DE4236070C2 - Clamp for connecting the edge profiles of formwork panels - Google Patents

Description

The invention relates to a clip for connecting in a Level formwork panels arranged side by side, the circumferential Have edge webs or edge profiles, with two against each other the opposite longitudinal surfaces of the adjacent edge webs or the like pivotable and compressing them Jaws and an actuator for pivoting of these jaws, with the two jaws each on its end facing away from its nip one at a distance to their pivot bearing arranged point of attack for the Have actuator and the actuator on egg is supported on the bracket belonging to the clip, to which chem the two jaws are pivotally mounted.

Such a bracket is known from DE-GM 88 14 208 and has with edge profiles in the form of hollow profiles relatively large cross-section proven. However, this is required Lich that the two jaws are approximately L-shaped and points to each other and overlap Ver have adjustment legs so that in the area of overlap at pull the eccentric on both of them together fen, its pivot and swivel mounting also vertical must be displaceable to the formlining. This results in one  easy to use because the eccentric is twisted desired tension causes. In particular, the requirement the mutual overlap of both jaws on their Ver but thighs causes a corresponding Platzbe may or limits the possibility of the selectable material cross cuts especially in their load area.

In the case of a clip of another type according to DE-27 59 966 C2 the jaws or clamping legs are not pivotable stored a carrier, but relative to each other with the help slidable from overlapping adjustment legs, whereby the adjustment legs are interspersed by a wedge the, so that the two ver adjusting leg and thus also the clamping leg against each other can be pulled and braced. The wedge must be included its broad side be arranged approximately parallel to the formlining, while its opposite, oblique to each other effective wedge surfaces approximately at right angles to the scarf skin and the direction of adjustment of the wedge again par is directed towards the formwork skin. This leads to the fact that Adjustment leg not only relative when driving the wedge adjusted to each other, but also at the same time can be pressed so that the occurring frictional force can enlarge such that at least part of the clamping force can be used up.

DE-35 17 307 A1 is a clamp-like clamping device device for edge profiles of neighboring formwork panels known which have a fixed jaw as a stop on one a second jaw is pivotally mounted on the carrier, the pivoting using an approximately perpendicular to the Formwork skin adjustable thread piece carried out and over an L-leg can be transferred. It follows different on the opposing jaws che movements and the selected translation with the help of a  straight screw movements on a Swivel part requires additional measures.

There is therefore the task of a parenthesis of the beginning mentioned type to create, in which the advantages of two rela tiv to each other and to a carrier pivoting jaws be maintained, but still a simple one, none Actuator that requires pivot bearings is used by anyone that can.

The solution to this problem is that the actuation element one with its flat side arranged in the swivel plane neter wedge is with one narrow side on the Formwork skin facing side of the wearer and with the other Arrange the wedge surface at a distance from the swivel bearings ten points of attack of the jaws supports that the An grip points of the two jaws on each other facing away from the sides and the wedge in his the end positions both jaws at their points of attack towered over.

It is therefore a very simple operation that has been proven with formwork cleaning element, namely a wedge provided, but avoided, that the wedge penetrates overlapping parts by the component oriented in the direction of impact of the wedge parts to be moved against each other. Much more the wedge surfaces can directly on the points of attack act without the parts to be pivoted thereby ge Touch each other and rub against each other. The result is that the wedge with its broad side in an approximately rectangular arranged to the formlining and usually horizontal level is effective while the two diagonally facing each other Wedge surfaces are in vertical planes, one of which is parallel lel can run to the formwork skin, while the other in the wedge Is at an angle. So there is a very one  Easy operation because the wedge is turned in one direction can be hit and thus both jaws relative to their carrier pivoted while being countered by an continued displacement of the wedge to be loosened and loosened.

It is particularly favorable if the carrier is a hollow profile and at least one arranged parallel to the pivot axis Leg for receiving the swivel bearing of the jaws like a crossbar from the formlining as an abutment ger for the wedge. It is particularly cheap if the carrier is angular or even U-shaped and the one angle leg or the U-cross bar the abutment of the wedge. The other angle leg or the U-legs can be used with their free edges position to the formwork skin, so that the actuation wedge between the pivot bearings and the abutment det, in which space the operating points of the Jaws protrude.

The points of attack of the wedge on the jaws are in Abutment closer than the pivot bearing.

The clamping jaws can in turn have an angular or approximately U- have cross-section and the carrier in the area of their Swivel bearing, especially outside, overlap or from the cross-sectionally U-shaped support itself be embraced. This results in a compact and stable con structure in which the forces occurring are largely sym can be initiated metrically.

A good introduction of force with simple guidance of the wedge can be achieved if the jaws in the loading realm of the wedge 's points of attack in their Direction of longitudinal extension beyond their swivel bearings chen and preferably the wedge and its attacking on them  Long, partially encompassing narrow sides, open at the ends have slits. The wedge cross section can therefore be long Intervene in the slots and withstand them so far that contact to the abutment, but the wedge does not only on its narrow sides, but also over part ner broadside detected and accordingly well managed.

It is useful if the long encompassing the wedge slit a width slightly exceeding the wedge thickness have and form a side guide of the wedge, which on its attacks both flat sides.

The length of the guide slot can be on both jaws be the same size and the jaws can be compared to one arranged at right angles to the beam and its crossbar Cross-sectional plane arranged at different angles or the crossbar of the wearer can be opposite the scarf skin at the angle at which the two are tapered active surfaces of the wedge arranged approximately to each other are. This can take into account the fact that due to the wedge gripping both jaws at the same time its wedge shape on one jaw with a narrower one Area than attacking the other cheek. However, it would be conceivable also vice versa the adjustment of the slot length to this under different widths of the wedge.

The wedge can at least narrow at its tapered End a protrusion protruding over the wedge surface as a stop against being pulled out of the bracket. This will make the Wedge captive and it also becomes narrow End widened so that a tool, for example a Hammer that can better attack the wedge in its looseness to move.  

Even at the wider end of the wedge, one can cross the boar extension protruding projection, especially one of the Formwork facing away from the projection. This will driving the wedge is also easier and better sert. It can also be used with a striking tool or the like this projection can be used to loosen the wedge, if the narrower wedge end, for example, because of too close arrangement is inaccessible on stiffening webs or the like.

An embodiment of the invention of great advantage, the one more effective introduction of the forces exerted on the wedge in the Allows meaning of closing the bracket, can in it exist that the located on the wider wedge end, across for wedge longitudinal extension or direction of movement of the wedge when clamping the clamp the narrow end face of the wedge runs at an angle, that between her and one of the swivel bearings opposite narrow side of the wedge an acute angle is included. The bevel on the front Narrow side and its angle with one narrow side of the Wedges can be chosen so that a perpendicular through this sloping surface the space between the two Jaws cut in as far as possible Release position, while driving in the wedge and / or also in the closed position of the clamp. Then it wanders of course this vertical line with progress driving the wedge from the outer opening of the Space towards the rear boundary.

The aforementioned inclined surface ensures that the Driving in the wedge applied impact forces more effective and cheaper via the wedge in the bracket be initiated. The sloping face on the wider one End of the wedge causes a larger force component approximately in Direction of the jaw extension so that the corresponding  Clamping jaw, which is at a distance from its swivel bearing, the faster and with greater force around its swivel axis Closing direction can be pivoted. This occurs on both jaws simultaneously.

It is no longer just the increasing one Widening of the wedge used the jaws more and pan more, but part of the punch is immediately in a pivoting of the jaws implemented. The other force component in the longitudinal direction of the Keiles does the necessary and desirable at the same time Move the wedge in its direction of impact. tries have shown that such an arrangement is essential smoother and vibration-free driving of the wedge and a correspondingly effective clamping of the jaws possible is elastic without disturbing the impact force Deformations of the edge webs to be braced on formwork panels to lead.

It is useful if the oblique face Narrow side down to the end of the wider end of the Wedge provided projection continues. A corresponding one large and easy to hit, opposite the direction of impact inclined face is available for the user.

Another embodiment of the invention, which is the solving of Can facilitate bracket accordingly, may be that the wedge at least one at its narrower end in areas to the one of the pivot bearings of the bracket opposite narrow side at an obtuse angle arranged narrow side as an impact surface for a Striking tool when loosening. So it can also be the shorter one Face of the wedge in one to the longer face opposed to be slanted to do so again a better distribution of the power components in the  Hitting this area to achieve. So that can also Loosening the wedge can be simplified because of the fact a considerable part of the power spent in one immediate pivoting of the jaws is implemented.

The helix angle of the narrower end face of the wedge can be chosen such that a perpendicular to this slanted front side with the clamp closed, approximately on the Clamping area of the jaws is directed. This measure, which also correspond to the wider wedge face has a corresponding helix angle, has as A good compromise has been shown, on the one hand, the clamping jaws to pivot as directly as possible, but on the other hand also Jamming or loosening accordingly without that reaction forces - even on the edge webs to be braced of formwork panels - lead to vibrations. It has shown, that a short stroke can be enough to get the wedge to tense on the one hand or to solve on the other hand because the Bracket arrangement does not spring in itself.

Overall, there is a bracket, the individual parts of which are all are captively attached to each other, so that the operation and storage is very easy. By the in Ge It is about the horizontal position of the wedge also possible, the clip according to the invention also very close to be attached to an upper or lower edge of a formwork, without with areas protruding from the formwork such as Example to collidie the floor at the bottom of the formwork ren.

Below are two embodiments of the invention based on the drawing with the features essential to the invention described in more detail. They show in partly schematic Presentation:  

Fig. 1 a view taken on two adjacent edge webs of be adjacent shuttering panels clip according to the invention in open position, the free edges of the edge webs are supported on the carrier of the clamp or pending, and is set the clip in top view,

Fig. 2 is a like FIG. 1 illustrating a top view of the clamp in the closed position,

Fig. 3 is a side view of the clamp of the invention in the position of use,

Fig. 4 is a Fig. 1 of an open parenthesis in plan view with a wedge whose frontal impact surfaces being arranged diagonally opposite the first embodiment,

Fig. 5 is a view corresponding to FIG. 4, a top view of the clip in the closed position and

Fig. 6 is a side view of the clip of FIGS. 4 and 5 in the use position.

A bracket denoted as a whole by 1 is used to connect formwork panels 2 arranged next to one another in one plane, which have circumferential edge webs 3 or edge profiles, on which the clip 1 according to FIGS. 2 and 3 in the use position in the sense of a compression of these contacting edge webs 3 takes hold.

For this purpose, the clamp has two swiveling and compressing beads 3 b of the adjoining edge profiles 3 against the longitudinal surfaces 3 a and the beads 3 b provided there and compressing clamping or clamping jaws 4 and an actuating element to be described for this pivoting and clamping of these clamping jaws 4 .

In the exemplary embodiment it can be seen that the two jaws 4 each at their end of their clamping point or their Klemmvor jump 4 a, which can engage in the bead 3 b, end facing away from their pivot bearing 5 arranged attack point 6 for the actuating element, which is a wedge 7 in the exemplary embodiment. This actuating element, that is, the wedge 7 , is supported on a bracket 8 which belongs to the bracket 1 so that the clamping force can be applied, transmitted and held via this support.

As already mentioned, for this purpose the actuating element is a wedge 7 with its flat side 7 a in the swivel plane, that is to say at right angles to the swivel axes 5, which wedge with one narrow side 7 b on the side of the formwork skin 9 of the formwork panels 2 and with the carrier 8 is supported on the c at a distance from the pivot bearings 5 arranged points of engagement 6 of the clamping jaws 4 on the wedge face. 7 Since at the points of attack 6 of the two jaws 4 each Weil on opposite sides of the pivot bearings 5 are arranged with a sufficient lever arm in order to move the wedge from the position shown in Fig. 1 in the position shown in Fig. 2 to a corresponding pivoting of the clamping points 4 a on the clamping jaws 4 to each other. In both end positions, the wedge 7 projects beyond both clamping jaws 4 at their points of attack 6 , so that in any case both clamping jaws 4 are pivoted relative to the carrier 8 by the displacement of the wedge 7 .

In particular, the Fig based. 3 it can be seen that the carrier 8 is a hollow profile and at least one arranged parallel to the pivot plane legs 8 a for receiving the pivot bearing 5 of the clamping jaws 4 and an end remote from the lining skin 9 crosspiece 8 b as an abutment for the wedge 7 and its Keilflä surface 7 b. The carrier could be angular, but in the exemplary embodiment is particularly U-shaped and the U-transverse web 8 b forms the abovementioned abutment for the wedge, while the two on the legs 8 a of which are designed as pins or bolts Swivel axis 5 are penetrated. Since the imaginary connection line of the points of attack 6 the abutment, that is the U-cross web 8 b, is closer than a connecting line of the pivot bearings 5 of the clamping jaws 4 and the points of attack 6 have a different, in the exemplary embodiment, greater distance than the two pivot bearings 5 from one another, introduces the wedge 7 from its position shown in FIG. 1 in the position according to FIG. 2 to a pivoting of the jaws 4 relative to the carrier 8 and each other.

From Figs. 1 and 2 on the one hand and Fig. 3 on the other is also apparent that the clamping jaws 4 turn an approximately U-shaped cross-section and have 8 overlap the carrier outside the region of its pivot bearing 5. It would al alerversely also possible that the clamping jaws 4 encompassed on the outside by the cross-sectionally U-shaped support 8 who the.

In the area of the points of attack 6 of the wedge 7 , the clamping jaws 4 extend in their longitudinal direction beyond their pivot bearings 5 and, according to FIG. 1, even one of the clamping jaws in the open position can also extend beyond the carrier 8. According to FIG. 3, the clamping jaws 4 have this Area each one the wedge 7 and its narrow side 7 c engaging around it, at the ends open long slot 10 . With reference to FIG. 3 it is seen that by a partially comes mainly on its flat sides 7 in this elongated slot 10 to face the wedge and is guided by them. This is favored by the fact that the elongated slots 10 encompassing the wedge 7 have a width slightly exceeding the wedge thickness and thus form the mentioned lateral guidance of the wedge 7 at two mutually spaced locations, which thus guides and defines the wedge well. On the other hand, this also fixes the clamping jaws 4 better with respect to the wedge and clamps them with the support 8 .

The length of the guide slot or long slot 10 on the two jaws 4 is in the embodiment - despite the different wedge width in each case in their area - the same size and the jaws 4 are therefore at a right angle to the carrier 8 and its crosspiece 8 b - and under egg Nem acute angle with respect to the flat sides of the edge webs 3 - arranged cross-sectional plane arranged at different angles or the crossbar 8 b of the carrier 8 is in relation to the formlining 9 in the use position at the angle at which the two tapering active surfaces of the wedge 7 approach each other approximately are arranged. Especially with reference to FIG. 2 it is clear that in a use position approximately symmetrical attack of the two clamping jaws 4 on the edge webs 3 of the carrier 8 with its cross bar 8 b extends somewhat obliquely and thus takes into account the wedge bevel.

At its tapering narrower end, the wedge 7 has a protrusion projecting beyond the wedge surface 7 c as a stop 11 against being pulled out of the clamp 1 . In addition, this means a widening of the wedge end, so that it can be struck with a hammer at this point to loosen.

Also at the wider end of the wedge 7 can be seen in the exemplary embodiment, a transverse to the wedge extension projecting before jump 12 , which is oriented in the embodiment according to the side facing away from the scarf skin 9 , while the stop 11 points opposite to the formlining 9 . This projection 12 increases the end face of the wedge, on which hammer blows can be acted on to increase the clamping force ver. In addition, this arrangement of the protrusion 12 allows access on its opposite side to release the wedge or to allow a hammer to act.

Overall, there is a horizontal arrangement of the wedge 7 and its flat sides 7 a in the case of vertically extending edge webs, so that the clamp is still very close to obstacles running at right angles to the edge webs to be connected, for example in the floor area the floor itself or hanging on the formwork Consoles or the like can be fixed without the wedge as such and its actuation and movement being disruptive. Even with an arrangement of the bracket 1 immediately above the footprint of a formwork, the wedge can be hammered in easily, which would not be possible with a wedge to be braced in the vertical direction at such a point.

In Fig. 1 and 2 it can be seen still in that the carrier 8 facing between the pivot bearings 5 at its the lining skin 9 side has an abutment and alignment surface 13, which may also be referred to as a stop surface and in the use position against the edges of the clamp 1 detected edge webs 3 or profiles. The dimensions are chosen so that the tensioning projections 4 a on the beads 3 b act in a tensioned position against a tensile force against this alignment surface 13 be so that any small original displacements of the edge webs 3 can be ausegli chen against each other by the bracing.

Overall, there is an easy-to-use and yet effective bracket 1 from a few simple individual parts, which, however, are connected to one another in such a way that no part can get lost and therefore do not have to be assembled for bracing edge webs 3 .

The above-mentioned advantages are also realized in the exemplary embodiment according to FIGS. 4 to 6, with corresponding parts being present and thus also having the same reference numbers.

In this exemplary embodiment according to FIGS. 4 to 6, however, in contrast to the first exemplary embodiment, it is provided that the end narrow side 14 located on the wider wedge end, which has the projection 12 , is arranged transversely to the wedge longitudinal extension or the direction of movement of the wedge 7 when the clamp 1 is clamped extends namely in one of the shuttering panel 2 facing away from the area obliquely such that between it and the one remote from the swivel bearings 5 narrow side 7 b of the wedge 7 is an acute angle α included. In Fig. 4 an imaginary extension of the narrow side 7 b to the point of intersection with the oblique front narrow side 14 is drawn in to illustrate this angle α.

This angle α or the bevel of the front narrow side 14 is selected such that a perpendicular to this inclined surface 14 and its extension through the inclined surface intersects the space between the two jaws 4 , such a perpendicular approximately to the center of the inclined surface in the initial position is directed into the area of the clamping projections 4 a, while in the clamped position ( FIG. 5) such a line also cuts the space between the two clamping jaws 4 , but closer to their pivot bearings 5 .

For ease of use, the oblique front narrow side 14 continues to the end of the projection 12 .

At the end of this oblique narrow side 14 opposite the projection 12 , an opposing slope is provided in order to somewhat restrict the entire wedge length and to ensure that the user applies the respective stroke in an area of the wedge where he himself good on the clamping jaws 4 via the wedge can be transferred.

At its smaller end, the wedge 7 also has a at least partially b to the one facing away from the pivot bearings 5 of the clamp 1 narrow side 7 at an obtuse angle β arranged narrow side 15 as an impact surface for a striking tool during release of the clamp. 1 The helix angle β of the narrower end face of the wedge 7 is selected such that is approximately directed a perpendicular to this inclined end face with a closed clamp 1 on the clamping region of the jaws 4 so that the releasing a good force transmission in the sense of a swiveling of the clamping jaws 4 is achieved. Due to the inclination, especially of the narrow side 14 , but also the opposite narrow side 15 , such a favorable force decomposition of an applied impact results that a single impact can be sufficient to tension or to release the clamp 1 , because the impact force is much more effective than in the exemplary embodiment is reacted according to FIGS. 1 to 3 in a pivoting of the clamping jaws 4. This is due to the fact that at the points of attack 6 of the wedge 7 on the clamping jaws 4 a considerably greater force component occurs in the direction of extension of these clamping jaws 4 than if only the widening of the wedge leads to a displacement of this point of attack 6 . The force component running in the jaw direction can pivot the jaw 4 directly under the lever arm relative to the pivot bearing 5 . Thus, reaction forces causing vibrations can be largely avoided.

The bracket 1 is used to connect in a plane next to each other arranged formwork panels 2 on their circumferential Randste gene 3 and has two these ridges 3 compressing clamping jaws 4 , which can be pivoted relative to one another and to a carrier 8 by means of a wedge 7 , the forms the counter or abutment for the wedge 7 at the same time. The clamping jaws have to a distance from their pivot bearings 5 under a lever arm engagement points 6 for the surface of the Abstützflä c 7 b facing away from the wedge surface. 7 These attack points 6 are expediently at the inner end of an open to the opposite side long and guide slot 10 angeord net, within which the wedge is also guided laterally when it is displaced. The wedge extension and movement he wrestles transversely to the extent of the pivot axes of Schwenkla 5 , with which the jaws 4 are pivotally attached to the common carrier 8 .

Claims (16)

1. clamp ( 1 ) for connecting formwork panels ( 2 ) arranged next to one another in one plane, which have circumferential edge webs ( 3 ) or edge profiles, with two pivotable against the mutually facing longitudinal surfaces ( 3 a) of the adjacent edge profiles or the like and to be pressed together Clamping jaws ( 4 ) and an actuating element for the pivoting of these clamping jaws ( 4 ), the two clamping jaws ( 4 ) each having at their end facing away from their clamping point a point of engagement ( 6 ) for the actuating element arranged at a distance from their pivot bearing ( 5 ) and the actuating element is supported on a bracket ( 1 ) belonging to the bracket ( 8 ), on which the two clamping jaws ( 4 ) are pivotally mounted, characterized in that the actuating element is arranged with its flat side ( 7 a) in the pivoting plane Wedge ( 7 ), which has one narrow side ( 7 b) facing the formwork skin ( 9 ) with the other wedge face (7c) is supported ndten side of the support (8) and at a distance from the swivel bearings (5) arranged points of application (6) of the clamping jaws (4), that the points of application (6) of the two clamping jaws (4) are each arranged on sides of the pivot bearings ( 5 ) facing away from one another and the wedge ( 7 ) projects over both clamping jaws ( 4 ) in their two end positions at their points of attack ( 6 ). 2. Clip according to claim 1, characterized in that the carrier ( 8 ) is a hollow profile and at least one leg arranged parallel to the pivot plane ( 8 a) for receiving the pivot bearing ( 5 ) of the clamping jaws ( 4 ) and one of the formlining ( 9 ) remote crossbar ( 8 b) as an abutment for the wedge ( 7 ). 3. Clip according to claim 1 or 2, characterized in that the carrier is angular or U-shaped and the one angle leg or the U-transverse web ( 8 b) the Wi derlager forms the wedge. 4. Clamp according to one of claims 1 to 3, characterized in that the points of attack ( 6 ) are closer to the abutment ( 8 b) than the pivot bearing ( 5 ) of the clamping jaws ( 4 ). 5. Clamp according to one of claims 1 to 4, characterized in that the clamping jaws ( 4 ) in turn have an angular or approximately U-shaped cross section and the carrier ( 8 ) in the region of their pivot bearing ( 5 ) on the outside or from the cross-sectionally U-shaped carrier are encompassed on the outside. 6. Clamp according to one of claims 1 to 5, characterized in that the clamping jaws ( 4 ) in the region of the attack ( 6 ) of the wedge ( 7 ) in their longitudinal direction extend beyond their pivot bearings and in particular the wedge ( 7 ) and its narrow side ( 7 c) engaging on them has partially encompassing, at the ends open long slots ( 10 ). 7. Clamp according to one of claims 1 to 6, characterized in that the wedge ( 7 ) encompassing slots ( 10 ) have a width slightly exceeding the wedge thickness and form a side guide of the wedge ( 7 ) which engages on its two flat sides . 8. Clamp according to one of claims 1 to 7, characterized in that the length of the guide slot ( 10 ) at the clamping jaws ( 4 ) is the same size and the clamping jaws ( 4 ) with respect to a cross-sectional plane arranged at right angles to the carrier and its crossbar are arranged at different angles or the cross bar ( 8 b) of the carrier ( 8 ) relative to the formlining ( 9 ) is below the angle at which the two tapering active surfaces of the wedge ( 7 ) are arranged approximately to one another. 9. Clip according to one of claims 1 to 8, characterized in that the wedge ( 7 ) at least at its ver tapering narrower end over the wedge surface ( 7 c) protruding projection as a stop ( 11 ) against withdrawal from the hen Has bracket ( 1 ). 10. Clamp according to one of claims 1 to 9, characterized in that also at the wider end of the wedge ( 7 ) a transverse to the wedge extension projecting projection ( 12 ), in particular a projection facing away from the formlining ( 9 ) is arranged. 11. Clamp according to one of the preceding claims, characterized in that the carrier ( 8 ) between the Schwenkla like ( 5 ) on its side facing the formlining ( 9 ) has an abutment and alignment surface ( 13 ) or stop surface for the edges of the from the clamp ( 1 ) captured edge webs ( 3 ) or profiles. 12. Clamp according to one of claims 1 to 11, characterized in that the narrow end face ( 14 ) located at the wider wedge end, transverse to the wedge longitudinal extension or to the direction of movement of the wedge ( 7 ) when the clamp ( 1 ) is tensioned, runs obliquely, that between it and the one, of the wedge an acute angle (7) (α) enclosed by the swivel bearings (5) facing away narrow side (7 b). 13. Clamp according to claim 12, characterized in that the bevel of the front narrow side ( 14 ) and its angle (α) with the one narrow side ( 7 b) of the wedge ( 7 ) is selected such that a perpendicular through this inclined surface ( 14th ) intersects the space between the two jaws ( 4 ) approximately in the area between the clamping points ( 4 a) and the pivot bearings ( 5 ). 14. Clip according to claim 12 or 13, characterized in that the oblique front narrow side ( 14 ) continues to the end of the at the wider end of the wedge ( 7 ) provided projection ( 12 ). 15. Clamp according to one of claims 1 to 14, characterized in that the wedge ( 7 ) at its narrower end an at least partially to the one of the pivot bearings ( 5 ) of the bracket ( 1 ) facing narrow side ( 7 b) under a blunt Has angle (β) arranged narrow side ( 15 ) as an impact surface for a striking tool when loosening. 16. Clamp according to claim 15, characterized in that the helix angle (β) of the narrower end face of the wedge ( 7 ) is selected such that a perpendicular to this oblique end face when the clamp ( 1 ) is closed, approximately on the clamping area of the clamping jaws ( 4 ) is directed.