Coupling unit

1. A coupling unit comprising:

the coupling unit configured to couple a freely displaceable device into an energy chain system having an energy chain which is fixedly connected to a coupling carriage which is displaceable parallel to a path of displacement of the device,

the coupling unit having a first plug portion which is connectable to the device in flexible and tensile-resistant relationship and which is connectable to a second plug portion arranged on the coupling carriage,

the coupling unit extendable with the first plug portion in a direction of the coupling carriage so that the two plug portions are positionable horizontally and vertically relative to each other and are connectable together, and the coupling unit, after connection of the two plug portions, is retractable, while the device and the coupling carriage remain connected together in tensile-resistant and flexible relationship,

wherein the coupling unit has a vertically displaceable wedge-shaped blade at which the first plug portion is arranged,

wherein the blade is raisable with the first plug portion, when the coupling unit is extended and the coupling carriage, upon displacement parallel to the path of displacement of the device, engages the blade, and

wherein the blade is configured such that, when the coupling carriage stops in a predetermined position relative to the device the blade falls to embrace the coupling carriage.

2. A system comprising:

a coupling unit configured to couple a freely displaceable device into an energy chain system having an energy chain which is fixedly connected to a coupling carriage which is displaceable parallel to a path of displacement of the device,

the coupling unit having a first plug portion which is connectable to the device in flexible and tensile-resistant relationship and which is connectable to a second plug portion arranged on the coupling carriage,

the coupling unit extendable with the first plug portion in a direction of the coupling carriage so that the two plug portions are positionable horizontally and vertically relative to each other and are connectable together, and the coupling unit, after connection of the two plug portions, is retractable, while the device and the coupling carriage remain connected together in tensile-resistant and flexible relationship,

wherein the coupling unit has a vertically displaceable blade having the first plug portion,

wherein the blade is raisable with the first plug portion, when the coupling unit is extended and the coupling carriage, upon displacement parallel to the path of displacement of the device, engages the blade, and

wherein the blade is configured such that, when the coupling carriage stops in a predetermined position relative to the device, the blade falls to embrace the coupling carriage.

3. A system comprising:

a freely displaceable device having a coupling unit configured to couple the freely displaceable device into an energy chain system having an energy chain which is fixedly connected to a coupling carriage which is displaceable parallel to a path of displacement of the device,

the coupling unit having a first plug portion which is connectable to the device in flexible and tensile-resistant relationship and which is connectable to a second plug portion arranged on the coupling carriage,

the coupling unit extendable with the first plug portion in a direction of the coupling carriage so that the two plug portions are positionable horizontally and vertically relative to each other and are connectable together, and the coupling unit after connection of the two plug portions, is retractable, while the device and the coupling carriage remain connected together in tensile-resistant and flexible relationship,

wherein the coupling unit has a vertically displaceable blade having the first plug portion,

wherein the blade is raisable with the first plug portion, when the coupling unit is extended and the coupling carriage, upon displacement parallel to the path of displacement of the device, engages the blade, and

wherein the blade configured such that, when the coupling carriage stops in a predetermined position relative to the device, the blade falls to embrace the coupling carriage.

4. A method to couple a freely movable device with an energy chain system having an energy chain, comprising:

connecting the freely movable device to a coupling unit, the coupling unit comprising a displaceable blade and a first plug portion,

connecting the energy chain to a coupling carriage, the coupling carriage displaceable parallel to a path of displacement of the device and comprising a second plug portion,

extending the blade and the first plug portion of the coupling unit in a direction towards the coupling carriage,

displacing the coupling carriage parallel to the path of displacement of the device,

engaging the blade of the coupling unit with the coupling carriage,

raising the blade and the first plug portion of the coupling unit vertically with the coupling carriage,

arranging the coupling carriage and the coupling unit relative to one another such that the blade and the first plug portion fall vertically after being raised, by which the blade embraces the coupling carriage and the first plug portion and the second plug portion are positioned horizontally and vertically relative to each other.

5. The method according to claim 4 , further comprising:

connecting the first plug portion and the second plug portion to each other.

6. The method according to claim 5 , further comprising:

retracting the blade and the first plug portion of the coupling unit in a direction away from the coupling carriage.