EP0615705B1 - Rotatable fastener - Google Patents

Abstract

The plane of at least one groove (21) containing a pulley cable (3) running round the outer periphery of the winder disc (2) contains a hub bore (22) diametrically penetrating the central hub part of the winder disc. The lengthwise section (3a) of the pulley cable runs through the hub bore, between its two ends. The two outer orifices of the hub bore widen out radially so as to curve backwards. Two cable pulley through-holes (4,5) in the housing periphery wall (1a) are diametrically opposite on the same plane as the cable pulley holder groove.

Description

The invention relates to a rotary lock for the adjustable, releasable contraction of two locking elements which can be clamped relative to one another, in accordance with the preamble of claim 1.

Twist locks of the type required in the preamble of claim 1 are known from EP-B-393 380 and EP-A-412 290. These known twist locks are specially designed for use on sports shoes. The closing flaps of a sports shoe can be contracted or released by winding or unwinding a traction cable on a winding disc rotatably mounted in a housing, for which purpose this winding disc has a traction cable receiving groove in which at least one end of the traction cable is fixed. So that a corresponding sports shoe can be adapted to the foot of a user, a precise adjustment of these twist locks is provided in that a releasable locking device or pawl device is arranged in the area between a turning handle acting on a rotary operating shaft and the winding disc. Furthermore, the rotary actuating shaft, which is rotatably mounted centrally in the housing, is in a drive connection with the winding disk via a gear arrangement, for example a planetary gear.

The invention is based on the object to further improve a twist lock of the type described in such a way that it is characterized by a particularly favorable pull cable arrangement and guide and by an enlarged pull cable holding capacity of the winding disk.

This object is achieved by the features of claim 1.

Advantageous refinements and developments of the invention are the subject of the dependent claims.

FR-A-21 77 294 describes the implementation of a twist lock for shoes, in particular ski boots, with reference to FIGS. 1 to 3. Here, the winding disc, which is mounted eccentrically and rotatably in a housing, is driven in one or the other winding direction with the aid of a Maltese drive via a rotary actuating handle. The pulling rope of this embodiment can be wound with its central longitudinal section on a circumferential receiving groove or unwound from there again, this pulling rope being arranged in two diametrically opposite recesses of this winding roll.

According to the present invention, the winding disc now has on its outer periphery two traction cable receiving grooves, which are incorporated into this outer periphery of the winding disc in two planes with axial spacing and parallel to one another and in an annular manner. In this case, a hub through-hole is provided in the plane or in the height of at least one of these two pull-rope receiving grooves, which passes diametrically through a central hub region of this winding disk and through which the pull rope is loosely guided with a central longitudinal section located between its two ends.

This design allows, on the one hand, an arrangement and guiding of the at least one pulling rope in two pulling rope receiving grooves lying parallel to one another, as a result of which the winding disk can accommodate a maximum of twice the amount of pulling rope, compared to a winding disk with only a single pulling rope receiving groove, which reduces the mutual bracing area of the pulling together and also releasably releasable locking elements. On the other hand, the pulling rope, which interacts with two locking elements which can be braced relative to one another, can at the same time be reliably arranged and guided in the respective pulling rope receiving groove, and in an extremely advantageous manner, free pulling of this pulling rope at least at the beginning of the tensioning or closing process of the corresponding pulling rope. Longitudinal section within the associated hub through bore, receiving groove and associated pull rope through openings is ensured in a housing wall. This free longitudinal mobility of the traction cable thus contributes to extremely good cable centering (self-centering) in the region of the winding disc at the beginning of the tensioning or closing process, so that the closing elements to be contracted can be braced relatively to one another in a manner which is extremely well adapted to the individual closing elements.

A particularly advantageous embodiment of the invention is also seen in the fact that the two outer mouth sections of the or each hub through-hole in the winding disk expand radially outwards in such a way that - when viewed from above and in the direction of winding rotation - they are considered constant groove width curved backward curved. As a result of these designs, when the traction cable is wound up in the associated traction cable receiving groove of the winding disk, there are, as it were, stepless transitions from the hub through bore to the outer circumferential wall of this hub, that is to say to the inner peripheral region of the circumferential traction cable receiving groove. The corresponding pull rope section is thus deflected into the pull rope receiving groove without significant kinking.

With regard to the assembly or replacement of the traction cable, it is easily conceivable that a corresponding traction cable can also be easily inserted from the outside through associated traction cable lead-through openings in a housing circumferential wall and through an associated hub through-hole without this Twist lock must be disassembled.

While the known designs described at the outset are intended for special use on sports shoes, the construction according to the invention of the twist lock enables use that is not only limited to sports shoes, but can also be adapted to many other useful applications, such as various items of clothing (for example gloves, especially baseball or other sports gloves, belts, outer clothing), protective helmets, bags, cases, quick fasteners for fastening of containers or similar parts on two-wheelers, etc. In any case, with the help of the twist lock (twist lock) according to the invention, fast locking of locking elements which can be braced relative to one another can be brought about, this bracing also being able to be released again quickly.

Fig.1

einen vertikalen Querschnitt (etwa Schnittlinie I-I in Fig.2 und 5) durch eine erste Ausführungsform des erfindungsgemäßen Drehverschlusses, bei der die zugehörige Wickelscheibe zwei Zugseil-Aufnahmenuten besitzt, von denen jede einen mittleren Längsabschnitt des Zugseiles aufnimmt;

Fig.2

eine etwas vereinfachte, horizontale Schnittansicht durch den Drehverschluß, etwa entlang der Linie II-II in Fig.1, wobei sich die Wickelscheibe in ihrer Ausgangsstellung befindet;

Fig.3

eine ähnliche Horizontalschnittansicht wie in Fig.2, wobei die Wickelscheibe jedoch bereits eine Teilumdrehung ausgeführt hat;

Fig.4

eine Horizontalschnittansicht durch den Drehverschluß bei einer Ausführungsvariante, in der sich die Zugseil-Durchführungsöffnungen in der Gehäuseumfangswand nicht diametral gegenüberliegen;

Fig.5

eine vereinfachte Horizontalschnittansicht etwa entlang der Linie V-V in Fig.1;

Fig.6

eine ähnliche vetikale Schnittansicht wie Fig.1 (Schnittlinie etwa entsprechend VI-VI in Fig.7) zur Erläuterung einer weiteren Ausführungsform, bei der die eine Zugseil-Aufnahmenut einen mittleren Längsabschnitt und die zweite Zugseil-Aufnahmenut die Enden des Zugseiles aufnimmt;

Fig.7

eine vereinfachte Horizontalschnittansicht etwa entlang der Linie VII-VII in Fig.6;

Fig.8 und 10

schematische Aufsichten auf besondere Ausführungsvarianten der Wickelscheibe mit allgemeinen Anwendungsmöglichkeiten der Zugseilführungen;

Fig.9

eine Seitenansicht der Wickelscheibe, etwa entsprechend Linie IX-IX in Fig.8.

The rotary lock according to the invention will be explained in more detail below with reference to some exemplary embodiments illustrated in the drawing. In this drawing:

Fig. 1

a vertical cross section (approximately section line II in Figures 2 and 5) through a first embodiment of the twist lock according to the invention, in which the associated winding disk has two pulling rope receiving grooves, each of which receives a central longitudinal section of the pulling rope;

Fig. 2

a somewhat simplified, horizontal sectional view through the twist lock, approximately along the line II-II in Figure 1, with the winding disc in its initial position;

Fig. 3

a similar horizontal sectional view as in Figure 2, but the winding disc has already made a partial revolution;

Fig. 4

a horizontal sectional view through the twist lock in an embodiment, in which the pull-cable through openings do not lie diametrically opposite in the housing peripheral wall;

Fig. 5

a simplified horizontal sectional view taken approximately along the line VV in Figure 1;

Fig. 6

a vetical sectional view similar to Figure 1 (section line approximately corresponding to VI-VI in Figure 7) to explain a further embodiment, in which the one pulling cable receiving groove receives a central longitudinal section and the second pulling cable receiving groove the ends of the pulling cable;

Fig. 7

a simplified horizontal sectional view taken approximately along the line VII-VII in Figure 6;

Fig. 8 and 10

schematic views of special design variants of the winding disk with general applications of the pull rope guides;

Fig. 9

a side view of the winding disc, approximately according to line IX-IX in Fig.8.

The general structure of the first embodiment of this twist lock according to the invention will be explained with reference to FIG. 1.

This rotary lock contains as an essential part a rotatably mounted in a housing 1 winding disc 2, on which - in the present case preferably - a single pull cable 3 can be wound up and unwound, which is passed through pull cable through openings or - holes 4, 5 which are provided in the peripheral wall 1 a of the housing 1. The pull rope 3 interacts with two closing elements, not shown in FIG. 1, which can be adjusted, but releasably pulled together by the twist lock, and can thus be braced relative to one another.

The rotary lock also contains a rotary actuation shaft 6 which is rotatably mounted centrally in the housing 1 and which is connected to the winding disk 2 in rotary drive connection via a gear arrangement, preferably via a planetary gear 7 with sun gear 8, planet gears 9 and internal ring gear 10. It is also expedient here if, in a manner known per se, one end (in FIG. 1 the lower end 6a) of the rotary actuation shaft 6 carries a disengageable coupling element 11a of a coupling 11 provided in the drive connection mentioned, which is counteracted by the force of a compression spring 12 exercisable, axial pressure actuation (arrow 13) of the rotary actuation shaft can be disengaged. In this disengaged state, the winding disc 2 is then freely rotatable, thereby a rapid unwinding of the wound pull rope 3 and thus a quick release of the bracing of the closing elements is made possible. Said lower end 6a of the rotary actuation shaft 6 projects together with the coupling element 11a carried by it axially into a central axial bore 14 of the central winding disk hub 15.

As is also known per se from the explanations described at the outset according to EP-B-393 380 and EP-A-412 290, the rotary drive of the winding disk 2 takes place in such a way that the rotary actuating shaft 6 via a rotary handle 16 which can be rotated relative to the housing 1, which, for example, covers the top of the housing 1 in a cap-like manner, is rotated in the desired direction, as a result of which the central sun gear 8 is driven via the coupling 11, which is in meshing engagement with a plurality of planet gears 9, which in turn are in meshing engagement with a stationary internal ring gear 10 and are freely rotatably guided on trunnions 18, which are fixedly formed on the upper, first outer side 2a of the winding disk 2.

In addition, based on the known design according to EP-B-393 380 coaxial with the winding disk 2 and on the lower, second outer side 2b of the winding disk 2 opposite the clutch 11, at least one stop element, for example in the form of a stop arm 17, or in the housing 1 two stop arms 17, be rotatably supported. This stop element (stop arm 17) comes into contact with the housing 1 after at least approximately two turns of the winding disc, as a result of which the rotary spring Winding disc 2 is limited accordingly to avoid overstraining the pull rope 3.

The winding disk 2 is received and guided in a preferably cylindrical shape in a corresponding section of the housing 1 (as can be seen in FIG. 1). In addition, it can also be expedient if a pivot pin 17a of the stop element 17 protrudes briefly from below into the axial bore 14 of the winding disk hub 15 from the lower, second outside 2b of the winding disk 2. The stop element 17 or one of the two stop elements 17 also has a second pivot pin 17b, which is arranged coaxially with the first pin 17a projecting into the axial bore 14 and opposite thereto and engages in a bearing bore 19 which engages in a bottom wall 1b of the housing 1 is provided appropriately (see also Fig. 6).

Finally, for the general structure of the twist lock, it should also be mentioned that this - similar to the two known designs mentioned above - also contains a releasable pawl device 20, which is designed to fix the twist actuating shaft 6 and the winding disk 2 in a made adjustment of the twist lock.

A special feature of this embodiment of the twist lock illustrated in FIG. 1 - but also similarly with reference to FIG. 6 - can be seen above all in that the winding disk 2 has two ring-shaped circumferential traction cable receiving grooves 21, 21a on its outer circumference, both of which are essentially the same can be great. These two traction cable receiving grooves 21, 21a are worked into the winding disk 2 (from its outer circumference) in two planes or vertical positions lying axially apart and parallel to each other. Each circumferential traction cable receiving groove 21, 21a is slightly larger in its axial dimension (slot width) than the diameter of the traction cable 3, and its radial dimension is large enough to be able to accommodate a sufficiently large central longitudinal section of the traction cable 3.

According to an essential concept of the invention, in this embodiment according to FIG. 1, an associated diametrical hub through bore 22 or 22c is provided for each of the two pulling cable receiving grooves 21, 21a. A hub through bore 22, 22c diametrically crossing the central hub region (hub 15) of this winding disk 2 is provided in the plane or at the height of each circumferential pulling rope receiving groove 21, 21a. Through these hub through bores 22, 22c, the traction cable 3 is loosely guided with middle longitudinal sections 3a, 3b located between its two ends 3c, 3d, ie the diameter of the hub through bores 22, 22c is accordingly only very slightly larger than the diameter of the traction cable 3, but preferably somewhat smaller than the axial width of the traction cable receiving grooves 21, 21a (as shown in FIG. 1). This The fact can also be seen in the horizontal sectional views in FIGS. 2 and 3.

Here are through both hub through bores 22, 22c - cf. 5 - middle longitudinal sections 3a and 3b of the pull cable 3 are passed in such a way that on the one hand the two ends 3c and 3d of this pull cable 3 located outside the twist lock and on the other hand an outer pull cable loop 3e formed by a longitudinal section with the closing ends in locking engagement stand, as it is illustrated with reference to Fig.8. The winding disk 2 can accommodate approximately twice the length of the pull rope 3 through the two pull rope receiving grooves 21 and 21a, i.e. this winding disk 2 with its pulling rope receiving grooves has, compared to the known embodiments described, with only one receiving groove a double pulling rope receiving capacity.

FIGS. 2 and 3 also show that the two outer mouth sections 22a, 22b of the hub through bores are increasingly widening radially outwards in such a way that - in the view of the winding disk 2 (FIGS. 2 and 3) and in its winding rotation direction (Arrow 23) considered - they run with a constant slot width (axial dimension in relation to the winding disk 2) curved backwards in an arc shape, as can be seen particularly well in FIG. 2 at 22a 'and 22b'. This allows a relatively continuous winding of each middle longitudinal section, for example 3a of the pull cable 3 in the transition from the associated hub through bore 22 to the outer peripheral wall of the hub 15. The latter is compared in a comparison between the starting position of the winding disk 2 in Fig.2 and the position of the winding disc 2 in Figure 3 clearly, wherein the winding disc 2 has made a first partial revolution after the starting position.

In this embodiment according to FIGS. 1, 2, 3 and 5, central longitudinal sections 3a, 3b of the pull cable 3 are loosely guided through the associated hub through bores 22, 22c and at the same level or height as the pull cable receiving grooves 21 and 21a on the one hand and the hub through bores 22 and 22c, on the other hand, can each have two pull cable through-openings 4, 5 in the housing peripheral wall 1a arranged diametrically opposite one another; however, the diametrically opposite pull-cable through-openings 4, 5 can also be provided as approximately vertically extending elongated holes in such a way that the two longitudinal pull-cord sections 3a, 3b running one above the other are passed through a respective elongated hole. The latter statement also applies in accordance with the further embodiment to be explained according to FIGS. 6 and 7. The embodiment just described is suitable for very different applications of the twist lock according to the invention.

Fig. 4 illustrates a variant of the previously explained embodiment. According to this, the two pull cable through openings 4 ', 5' are also arranged in the same plane as the associated pull cable receiving groove 21 and the associated hub through bore 22; however, they are not diametrically opposed, but have a circumferential section UA of less than 180 °, preferably approximately 90 ° from one another. This can be especially the case with sports shoes, especially ski boots, be advantageous if the twist lock is to be attached to a so-called spoiler.

An essential difference between the embodiment described above in particular with reference to FIGS. 1 and 5 and that according to FIGS. 6 and 7 can be seen in the fact that according to FIGS. 6 and 7 only a diametrical hub through-bore for the one, lower pull-rope receiving groove 21 22 is provided for the loose passage of a central longitudinal section 3a, while the two ends 3c and 3d of the pull rope 3 are fixed in the plane or height of the upper, second pull rope receiving groove 21a in the winding disk hub 15. This setting can take place, for example, in that corresponding blind bores and through bores - as indicated in FIG. 7 - are provided in the winding disk hub 15, which receive the outermost end sections of these two cable ends 3c and 3d, these outermost end sections then preferably in the associated hub bores Ultrasonic welding, that is to say in an extremely simple manner, can be attached to the hub 15, in particular when the traction cable 3 is a corresponding plastic cable and the winding disk 2 or its hub 15 is a corresponding plastic part.

As can also be seen in FIGS. 6 and 7, two outer pulling rope loops 3e and 3f are formed by the embodiment selected there, which, as indicated in FIG. 10, can engage the corresponding locking elements, the points of engagement thereof are indicated at 24 and 25 (similar points of attack 24, 25 of corresponding locking elements are also illustrated in FIG. 8).

The hub through bore in the winding disk 2 of the embodiments according to FIGS. 6 and 7 can also be shaped in the same way, as is explained in more detail with reference to FIGS. 2 and 3.

While in the representations in FIGS. 1, 5, 6 and 7, the longitudinal sections of the pull cable (including the corresponding ends) introduced into the two superimposed pull cable receiving grooves 21, 21 a in the starting position of the winding disk 2 (see FIG. 2) approximately FIGS. 8 to 10 run parallel to one another, according to which the longitudinal sections of the pulling cable (for example middle longitudinal sections 3a, 3b in FIG. 9) inserted into the two superimposed pulling rope receiving grooves 21, 21a are in the starting position of the winding disk 2 cross, preferably run approximately at right angles to each other. 8 and 9 is essentially adapted to the example of FIGS. 1 and 5 and the configuration of FIG. 10 is essentially adapted to the example of FIGS. 6 and 7.

Reference is once again made to the two embodiments according to FIGS. 1 and 5 on the one hand and to FIGS. 6 and 7.

If one first looks at FIGS. 1 and 6, the design and arrangement of the clutch 11 in the transmission connection between the lower end 6a of the rotary actuating shaft 6 and the planetary gear 7, then the disengageable coupling element (for example a claw coupling part) 11a projects from the lower shaft end 6a the upper outer side 2a of the winding disk 2 somewhat in the upper end portion of the axial bore 14 Winding disc hub 15 into it. Between the underside of the coupling element 11a and the longitudinal section (3a in FIGS. 6 and 3b in FIG. 1) of the pull cable 3 that is directly adjacent to this coupling element 11a, such a clear axial clearance must now be present in the axial bore 14 (see FIG. 1). be present that the lower shaft end 6a together with the coupling element 11a can be pressed down sufficiently far axially into the axial bore 14 in order to be able to disengage the coupling in the desired manner if necessary. Accordingly, the axial length of the end section of the axial bore 14 receiving the lower shaft end 6a and the coupling element 11a must extend from the corresponding outer side 2a of the winding disk 2 to the nearest hub through bore 22 or 22c - according to arrow 13 - at least the maximum pressure actuation path (corresponding to play s) plus corresponds at least to coupling element 11a or its thickness. Since in the embodiment according to FIGS. 1 and 5, two middle longitudinal sections 3a, 3b pass through the winding disk hub 15, while in the embodiment according to FIGS. 6 and 7 only a single middle longitudinal section 3a crosses the winding disk hub 15, the axial dimension or thickness of the 6 and 7 are kept smaller than in the case of the example according to FIGS. 1 and 5, as a comparison of the drawings in FIGS. 1 and 6 shows.

In this context, it should also be pointed out that the pivot bearing pin 17a of the stop element 17, which projects into the axial bore 14 of the winding disk hub 15, projects only as far into this bore, that in any case the closest or lower hub through bore 22 is left free.

With regard to the design of the pull cable through-openings 4, 5, it should also be mentioned that these - as indicated in Fig. 2 at 4a and 5a - similar curved sections as the mouth sections 22a, 22b of the hub through holes (Fig. 2 and 3) in the Can have way that the pull rope 3 can be guided or deflected largely without kinks during the winding process along the curved opening sections 4a, 5a.

As can be seen from the exemplary embodiments described, the use of only a single pulling rope is particularly preferred in this rotary lock or rotary clamp. In the described embodiments, however, it is also possible to provide at least two traction cables in a corresponding manner, it being possible, for example, in the case of two traction cable receiving grooves, to assign a traction cable to each of the receiving grooves of the winding disk.

This twist lock according to the invention can be made of any suitable material. At least the main parts of this twist lock can be made of metal, preferably relatively wear-resistant light metal. However, an embodiment is also particularly preferred in which at least the main parts of this twist lock are made of plastic material, preferably of an impact-resistant and wear-resistant plastic material.

In any case, this twist lock according to the invention can be adapted extremely well to very different applications, it also being distinguished by a particularly flat and space-saving design.

Claims (14)

1. Rotary fastener for adjustable and releasable drawing together of two closure elements which can be braced relative to one another, comprising

   a) at least one traction cable (3) which can be wound and co-operates with one of the two closure elements,

   b) a winding pulley (2) rotatably mounted in a housing (1) for winding on and unwinding of the traction cable (3), wherein this traction cable is passed through holes (4, 5) in the peripheral wall (1a),

   c) a rotary actuating spindle (6) which is rotatably mounted substantially in the centre of the housing (1) and is in drive connection with the winding pulley by way of a gearing arrangement (7),

   d) a releasable ratchet arrangement (20) for fixing the rotary actuating spindle (6) and the winding pulley (2) in a setting of the rotary closure,

   wherein

   e) the winding pulley (2) has running around its outer circumference two traction cable receiving grooves (21, 21a) machined in two planes lying parallel to one another,

   f) in the plane of at least one of these two traction cable receiving grooves (21, 21a) there is provided a hub bore (22, 22c) which diametrally traverses a central hub region of this winding pulley and through which the traction cable (3) is loosely passed with a central longitudinal portion (3a, 3b) located between its two ends.
2. Rotary fastener as claimed in Claim 1, characterised in that the two outer mouth portions (22a, 22b) of the hub bore (22, 22c) are increasingly widened outwards in the radial direction in such a way that - when considered in a top view of the winding pulley (2) and in the direction of winding thereof (23) - they extend so that they are curved backwards with the groove width remaining constant.
3. Rotary fastener as claimed in Claim 2, characterised in that two traction cable holes (4, 5) are disposed in the peripheral housing wall (1a) in the same plane as the traction cable receiving groove (21, 21a) and lie approximately diametrally opposite one another.
4. Rotary fastener as claimed in Claim 2, characterised in that two traction cable holes (4', 5') are disposed in the peripheral housing wall (1a) in the same plane as the traction cable receiving groove (21, 21a) and have a peripheral spacing (UA) of less than 180°, preferably of approximately 90° from one another.
5. Rotary fastener as claimed in Claim 1, characterised in that two traction cable receiving holes (4, 5) lying approximately diametrally opposite one another in the peripheral housing wall (1a) are co-ordinated with both traction cable receiving grooves (21, 21a).
6. Rotary fastener as claimed in Claim 1, characterised in that a diametral hub bore (22, 22c) is provided which is associated with each of the two traction cable receiving grooves (21, 21a), wherein central longitudinal portions (3a, 3b) of the traction cable (3) are loosely passed through both hub bores in such a way that on the one hand the two ends (3c, 3d) of this traction cable and on the other hand an outer loop (3e) of traction cable formed by a longitudinal portion of traction cable located outside the housing (1) are in closing engagement with the closure elements.
7. Rotary fastener as claimed in Claim 1, characterised in that the two ends (3c, 3d) of the traction cable (3) are fixed in the plane of the second traction sable receiving groove (21a) in the winding pulley hub (15), preferably secured by ultrasonic welding, wherein two outer loops (3e, 3f) of traction cable formed outside the housing (1) are in closing engagement with the closure elements.
8. Rotary fastener as claimed in Claim 1, characterised in that the longitudinal portions of traction cable inserted into the two traction cable receiving grooves (21, 21a) extend approximately parallel to one another in the starting position of the winding pulley (2).
9. Rotary fastener as claimed in Claim 1, characterised in that the longitudinal portions of traction cable inserted into the two traction cable receiving grooves (21, 21a) cross over one another, preferably extending approximately at right angles to one another, in the starting position of the winding pulley (2).
10. Rotary fastener as claimed in Claim 1, characterised in that one end (6a) of the rotary actuating spindle (6) protrudes into a central axial bore (14) in the winding pulley hub (15) and bears a disconnectable coupling element (11a) of a coupling (11) which is provided in the drive connection between the rotary actuating spindle and the gearing arrangement and which can be disconnected by axial pressure actuation (13) of the rotary actuating spindle which can be exerted against a spring force, and that the axial length of the end portion of the axial bore (14) which receives one end (6a) of the rotary actuating spindle (6) and the coupling element (11a) from the corresponding outer face (2a) of the winding pulley (2) to the nearest hub bore (22, 22c) corresponds at least to the maximum pressure actuation path plus at least the coupling element (11a).
11. Rotary fastener as claimed in Claim 10, characterised in that at least one stop element (17) is rotatably mounted in the housing (1) coaxially with respect to the winding pulley (2) and on the second outer face (2b) of the winding pulley opposite the coupling (11), the stop element (17) coming to rest on the housing after at least approximately two revolutions of the winding pulley and thereby limiting the rotary movement of the winding pulley, and that a trunnion (17a) of the stop element (17) protrudes from the second outer face (2b) of the winding pulley into the axial bore (14) of the winding pulley hub (15), freeing the nearest hub bore (22).
12. Rotary fastener as claimed in Claim 11, characterised in that the stop element (17) has a second trunnion (17b) which is disposed coaxially with the first trunnion (17a) protruding into the axial bore (14) of the winding pulley hub (15) and opposite thereto and engages in a bearing bore (19) which is suitably provided in a base wall (1b) of the housing (1).
13. Rotary fastener as claimed in Claim 1, characterised in that at least the principal parts of this rotary closure are made from plastics material, preferably from an impact-resistant and wear-resistant plastics material.
14. Rotary fastener as claimed in Claim 1, characterised in that at least the principal parts of this rotary closure are made from metal, preferably relatively wear-resistant light metal.

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