Blade gripping tool and device

1. A blade gripping tool of a blade gripping device for gripping a rotor blade of a wind turbine, which blade gripping tool comprises

a sling and

an automatic sling handover mechanism comprising a sling-conveying element and a sling-receiving element, whereby the sling-conveying element is realized to convey a connection means of the sling solely along a two-dimensional predefined path of travel around a part of the rotor blade towards the sling-receiving element to connect to a receptor of the sling-receiving element.

2. The tool according to claim 1 , wherein the sling handover mechanism further comprises a guiding mechanism realized to guide the sling-conveying element along the path of travel.

3. The tool according to claim 1 , wherein the sling handover mechanism further comprises an actuator which in operation automatically moves the sling-conveying element from the open position towards a handover position.

4. The tool according to claim 1 , wherein the sling-conveying element comprises an engaging element realized to engage with the connection means of the sling.

5. The tool according to claim 1 , whereby the receptor is equipped with a positioning means realized to compel the connection means of the sling into a predefined interlocking orientation, whereby the receptor comprises a hook assembly equipped with a magnet.

6. The tool according to claim 1 , whereby the sling-receiving element is connected to and/or comprises a number of adjustment means realized to adjust the position and/or orientation and/or size of the sling receiving element.

7. The tool according to claim 6 , whereby the adjustment means comprises a hinge mechanism.

8. The tool according to claim 6 , whereby the adjustment means comprises a telescopic assembly realized to bring the sling-receiving element into a designated operating position.

9. The tool according to claim 1 , whereby the sling is held within the tool such that it is automatically driven or kept by an actuator system into a safe position.

10. The blade gripping tool, according to claim 1 , for a blade gripping device for gripping a rotor blade of a wind turbine, whereby the blade gripping tool is tiltable about a horizontal axis which axis is parallel to a longitudinal axis of the rotor blade when held in a designated gripping position by the tool.

11. A blade gripping device for gripping a rotor blade of a wind turbine, comprising a blade gripping assembly with a number of blade gripping tools, wherein at least one blade gripping tool comprises a blade gripping tool according to claim 1 .

12. A device according to claim 11 , comprising a sensor arrangement realized to sense a specific feature of the rotor blade, whereby the specific feature is such that it can be used to orientate the blade holding device relative to the rotor blade in a blade gripping maneuver.

13. The device according to claim 11 , comprising

a first frame which is essentially horizontally aligned in a designated operating position and

a second frame which is essentially horizontally aligned in the designated operating position and

the blade gripping assembly,

whereby the first frame and the second frame are connected to each other via a swivel connection, which swivel connection is realized to permit a yawing movement of the second frame relative to the first frame.

14. A blade gripping tool of a blade gripping device for gripping a rotor blade of a wind turbine, which blade gripping tool comprises

a sling and

an automatic sling handover mechanism comprising a sling-conveying element and a sling-receiving element, whereby the sling-conveying element is realized to convey a connection means of the sling solely along a two-dimensional predefined path of travel around a part of the rotor blade towards the sling-receiving element to connect to a receptor of the sling-receiving element,

wherein the sling-conveying element comprises a curved shape which defines the path of travel.

15. A method of gripping a rotor blade of a wind turbine by means of a number of blade gripping tools of a blade gripping device, at least one of which blade gripping tools comprises a sling and an automatic sling handover mechanism comprising a sling-conveying element and a sling-receiving element, whereby the sling-conveying element conveys a connection means of the sling solely along a two-dimensional predefined curved path of travel around a part of the rotor blade towards the sling-receiving element to connect to a receptor of the sling-receiving element.