Twin clamp and method for simultaneously clamping two elongate profile segments

1. Twin clamp, comprising:

first and second receptacles ( 61 , 62 ), each of which has two movable clamping jaws ( 611 , 612 , 621 , 622 ) and by means of each of which an elongate profile segment ( 71 , 72 ) having a circular cross-section can be clamped in a contact section, each elongate profile segment having a center axis (D 71 , D 72 ) and an outside diameter;

a first and a second differential gearing ( 41 , 42 );

wherein a respective two of the clamping jaws ( 611 , 612 , 621 , 622 ) of different respective receptacles of the two receptacles ( 61 , 62 ) are coupled to one another via a respective one of the differential gearings ( 41 , 42 ) and two of the clamping jaws ( 611 , 612 , 621 , 622 ) of a same receptacle of the two receptacles ( 61 , 62 ) are coupled to one another via a synchronous gearing ( 51 , 52 ) and the position of the centre axes (D 71 , D 72 ) of the clamped elongate profile segments ( 71 , 72 ) is independent of the size of the outside diameters of the elongate profile segments ( 71 , 72 ), wherein the twin clamp further comprises a centric clamp ( 4 ) for the two differential gearings ( 41 , 42 ), by which the two differential gearings ( 41 , 42 ) can be moved relative to one another.

2. Twin clamp according to claim 1 ,

characterized in that the first clamping jaw ( 611 ) of the first receptacle ( 61 ) and the second clamping jaw ( 621 ) of the second receptacle ( 62 ) are coupled to one another via the first differential gearing ( 41 ) and the other first clamping jaw ( 612 ) of the first receptacle ( 61 ) and the other second clamping jaw ( 622 ) of the second receptacle ( 62 ) are coupled to one another via the second differential gearing ( 42 ), and the first clamping jaw ( 611 ) and the other first clamping jaw ( 612 ) are coupled to one another via a first synchronous gearing ( 51 ) and the second clamping jaw ( 621 ) and the other second clamping jaw ( 622 ) are coupled to one another via a second synchronous gearing ( 52 ).

3. Twin clamp according to claim 2 ,

characterized by the first synchronous gearing ( 51 ) which has at least one fifth tooth row ( 25 ) on a first synchronous support ( 31 ) with two fifth tooth row sections ( 251 , 252 ) located next to one another and at least one sixth tooth row ( 26 ) on a second synchronous support ( 32 ) with two sixth tooth row sections ( 261 , 262 ), and in that in each case there is arranged between the two fifth ( 251 , 252 ) and the two sixth tooth row sections ( 261 , 262 ) at least one first synchronous pinion ( 511 - 516 ) which couples the two fifth ( 251 , 252 ) and sixth tooth row sections ( 261 , 262 ) to one another, and the second synchronous gearing ( 52 ) which has at least one seventh tooth row ( 27 ) on a third synchronous support ( 33 ) and at least one eighth tooth row ( 28 ) on the fourth synchronous support ( 34 ), wherein there is arranged between the seventh ( 27 ) and the eighth tooth row ( 28 ) at least one second synchronous pinion ( 521 - 526 ) which couples the seventh ( 27 ) and eighth tooth row ( 28 ) to one another.

4. Twin clamp according to claim 3 ,

characterized by a first ( 91 ) and a second differential support ( 92 ), on which the first differential pinions ( 111 - 114 ) and respectively second differential pinions ( 121 - 124 ) are rotatably mounted and which are connected in a fixed position to carrier plates ( 301 - 304 ) of the centric clamp ( 4 ).

5. Twin clamp according to claim 3 ,

characterized in that one first clamping jaw ( 611 ) of the first receptacle ( 61 ) is connected in a fixed position to the third synchronous support ( 33 ) and the other first clamping jaw ( 612 ) of the first receptacle ( 61 ) is connected in a fixed position to the second synchronous support ( 32 ) and one second clamping jaw ( 621 ) of the second receptacle ( 62 ) is connected in a fixed position to the first synchronous support ( 31 ) and the other second clamping jaw ( 622 ) of the second receptacle ( 62 ) is connected in a fixed position to the fourth synchronous support ( 34 ).

6. Twin clamp according to claim 1 ,

characterized by the first differential gearing ( 41 ) comprising a first synchronous support ( 31 ) having at least one first tooth row ( 21 ) and comprising a third synchronous support ( 33 ) having at least one third tooth row ( 23 ), and at least one first differential pinion ( 11 ) which engages in the at least one first ( 21 ) and the at least one third tooth row ( 23 ) and couples the first ( 21 ) and third tooth row ( 23 ) to one another, and by the second differential gearing ( 42 ) comprising a second synchronous support ( 32 ) having at least one second tooth row ( 22 ) and comprising a fourth synchronous support ( 34 ) having at least one fourth tooth row ( 24 ), and at least one second differential pinion ( 12 ) which engages in the at least one second and the at least one fourth tooth row ( 24 ) and couples the second ( 22 ) and fourth tooth row ( 24 ) to one another.

7. Twin clamp according to claim 6 ,

characterized in that the at least one first tooth row ( 21 ) comprises two first tooth row sections ( 211 , 212 ) which are located opposite one another and between which two first groups of first differential pinions ( 111 - 114 ) are arranged, and in that two third tooth row sections ( 231 , 232 ) which are located opposite one another are arranged between the two first groups of first differential pinions ( 111 - 114 ) and each of the groups of first differential pinions ( 111 - 114 ) engages in respectively one first ( 211 ) and one third tooth row section ( 231 ), and

the at least one second tooth row ( 22 ) comprises two second tooth row sections ( 221 , 222 ) which are located opposite one another and between which two second groups of second differential pinions ( 511 - 514 ) are arranged, and in that two fourth tooth row sections ( 241 , 242 ) which are located opposite one another are arranged between the two second groups of second differential pinions ( 511 - 514 ) and each of the groups of second differential pinions ( 511 - 514 ) engages in respectively one second ( 221 ) and one fourth tooth row section ( 241 ).