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A closure for holding closed a door which is able to hinge in a frame, having a securing device which can be positioned on a first edge of the closed door and also a tightening unit which can be positioned on a second edge of the closed door and a cable or strap which, when the door is closed, runs

A closure for holding closed a door which is able to hinge in a frame, having a securing device which can be positioned on a first edge of the closed door and also a tightening unit which can be positioned on a second edge of the closed door and a cable or strap which, when the door is closed, runs through a gap between the door and frame and is fastened at one end to the securing device and fastened at the other end in the tightening unit, the tightening unit having inter alia a base plate with an opening for feeding through the cable or strap and also a tightening mechanism for tensioning and holding under tension the cable or strap guided through the opening and a cap with a lock which can be positioned on the base plate so as to produce a seal around the tightening mechanism. The securing device has a support extending on both sides of the cable or strap over a distance which is greater than the gap between the closed door and the frame, which distance is preferably greater than 5 mm.

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1. A closure for holding closed a door in a frame, comprising: a securing device positioned on a first side of the closed door, a tightening unit positioned on a second side of the closed door and a cable, when the door is closed, runs through a gap between the door and the frame, which cable is fas

1. A closure for holding closed a door in a frame, comprising: a securing device positioned on a first side of the closed door, a tightening unit positioned on a second side of the closed door and a cable, when the door is closed, runs through a gap between the door and the frame, which cable is fastened at one end to the securing device and at the other end in the tightening unit, the tightening unit comprising a base plate with an opening for feeding through the cable connected to the securing device, a tightening mechanism for tensioning and holding under tension the cable guided through the opening and a cap with a lock, the cap and the base plate forming an enclosure around the tightening mechanism, characterised in that the securing device comprises a support extending on both sides of the cable with a smallest dimension that is greater than the gap between the closed door and the frame, and in that the tightening mechanism comprises a clamp with teeth for gripping the cable at any length. 2. The closure according to claim 1, wherein the support is configured as a pin with a length longer than the width of the door. 3. The closure according to claim 1, wherein the cable is a tape having a width of at least 5 to 10 mm and the support extends perpendicularly to the tape on both sides of the tape. 4. The closure according to claim 1, wherein a distance from the opening in the base plate to an edge of the base plate is at least 5 mm. 5. The closure according to claim 1, wherein the cable comprises one of at least a woven plastics material and a woven plastics material with steel wire woven into the cable. 6. The closure according to claim 1, wherein the cable is configured as one of at least a wire of steel and a high-strength plastics material. 7. The closure according to claim 1, wherein the cable has a tensile strength of at least 3,000 N. 8. The closure according to claim 1, wherein the clamp comprises an opening for feeding through the cable between a movable clamping jaw and a stationary clamping jaw and also a spring for rotating the movable clamping jaw so that the opening becomes minimal. 9. The closure according to claim 1, wherein the tightening unit comprises a warning which is activated if an unusual degree of force is exerted on the closure. 10. The closure according claim 1, wherein the support includes a magnet that can be fastened to the frame. 11. The closure according to claim 1, wherein a screw can rotate in the clamp to tension the cable and the closed enclosure prevents rotation of the screw. 12. The closure according to claim 11, wherein the screw comprises a head with an eye opening, and the cap comprises a slot through which the head extends when the cap forms an enclosure around the clamp and wherein the slot prevents rotation of the head and the lock through the eye opening prevents removal of the cap. 13. A closure device for holding closed a door in a frame, comprising: a securing device adapted to be positioned on one side of the closed door;a tightening unit adapted to be positioned on another side of the closed door;a cable adapted to run through a gap between the door and the frame, said cable being fastened at a first end to said securing device and at a second end to said tightening unit;wherein said tightening unit comprises: a base plate with an opening for feeding through said cable connected to said securing device, a cap with a lock, and a tightening mechanism for tensioning and holding said cable guided through said opening, said cap and said base plate forming an enclosure around said tightening mechanism;wherein said securing device has a support extending on both sides of the cable with a smallest dimension adapted to be greater than the gap between the closed door and the frame; andwherein said tightening mechanism comprises a clamp with teeth for gripping said cable at any length. 14. The closure according to claim 13, wherein the support is configured as a pin with a length longer than the width of the door. 15. The closure device according to claim 13, wherein the cable is a tape having a width of at least 5 to 10 mm and the support extends perpendicularly to the tape on both sides of the tape. 16. The closure device according to claim 13, wherein a distance from the opening in the base plate to an edge of the base plate is at least 5 mm. 17. The closure device according to claim 13, wherein the cablc compriscs cable comprises one of at least a woven plastics material and a woven plastics material with steel wire woven into the cable. 18. The closure device according to claim 13, wherein the cable is configured as one of at least a wire of steel and a high-strength plastics material. 19. The closure device according to claim 13, wherein the cable has a tensile strength of at least 3,000 N. 20. The closure device according to claim 13, wherein the clamp comprises an opening for feeding through the cable between a movable clamping jaw and a stationary clamping jaw and also a spring for rotating the movable clamping jaw so that the opening becomes minimal.