EP4319942A1

EP4319942A1 - Pliers

Info

Publication number: EP4319942A1
Application number: EP22720705.7A
Authority: EP
Inventors: Mario Mosler; Kevin LIEDTKE; Christian Holz
Original assignee: Knipex Werk C Gustav Putsch KG
Current assignee: Knipex Werk C Gustav Putsch KG
Priority date: 2021-04-07
Filing date: 2022-04-05
Publication date: 2024-02-14
Also published as: US20240181604A1; WO2022214471A1; TW202245992A; JP2024513092A

Abstract

The invention relates to pliers (1) having two plier arms (3 and 4) which cross one another by means of a joint bolt (2) having a joint bolt axis (x) and of which one plier arm (4) may be regarded as movable and the other (3) as stationary; gripping portions (8 and 9) are formed on one side of the joint bolt (2) and jaws (5 and 6) which co-operate as the mouth (7) of the pliers are provided on the other side of the joint bolt (2); furthermore, the movable plier arm (4) has a longitudinal slot (13) with a toothing (16) and the joint bolt (2) located in a receptacle (12) is movable out of a toothing engagement and the movable arm (4) penetrates the stationary plier arm (3); the longitudinal slot (13) has an extent (S) which, with the pliers (1) closed, runs transversely to an orientation of the plier arms (3 and 4) at the gripping end. In order to design pliers of the type in question for safe handling and operation, according to the invention the toothing (16) can be overrun by depression of the joint bolt (2) for adjustment of a mouth opening width (w); the penetrating plier arm (4) has an elongate overlap region (U) in which the penetrating plier arm (4) is overlapped on both sides by the penetrated plier arm (3); furthermore, the overlap region extends (U) substantially at right angles to an adjustment direction (r) of the joint bolt (2) in the longitudinal slot (16), having a width (g), which corresponds to 0.5 times or more of the maximum degree of adjustment (f), and having a length (d), which corresponds to 2 times or more of the maximum degree of adjustment (f).

Description

description

Tongs

field of technology

The invention relates to pliers with two pliers legs crossing in a hinge pin with a hinge pin axis, one of which is to be regarded as movable and the other as fixed, with handle sections on one side of the hinge pin and handle sections on the other side of the hinge pin as Jaw jaws interacting with the pliers mouth are formed, the movable limb of the pliers also having a longitudinal slot with teeth and the hinge pin located in a receptacle being movable out of a toothed engagement and the movable limb of the pliers passing through the stationary limb of the pliers, the longitudinal slot further having an extent which, when the pliers are closed, runs transversely to an alignment of the pliers legs on the handle side.

The invention also relates to pliers with two pliers legs that can be pivoted about an axis of rotation and a pliers mouth formed from two jaws, the pliers mouth having opposing working surfaces, a first working surface and a second working surface, which are seen over a significant part of their length from a free end of the jaws towards the axis of rotation, are provided with a toothing, with pointed, tapered teeth having an orientation of the tooth tips in the direction of the axis of rotation, and further pointed teeth having an orientation of the tooth tips to the free end of the jaws.

The invention further relates to a pair of pliers with two pliers arms pivotable about an axis of rotation and a pliers mouth, the pliers mouth having working surfaces which are provided with teeth and which pointed teeth have an orientation in the direction of the axis of rotation with regard to a course of tooth tips in the working surface, with the teeth each having an angle bisector, with the angle bisectors starting from the tooth tip and facing away from the pliers mouth to the free end of the jaws or to the end on the joint side of the forceps mouth.

The invention also relates to pliers with two pliers legs pivotable about an axis of rotation and a pliers mouth, the pliers mouth having working surfaces which are provided with teeth and the teeth tapering to a point with respect to a course of tooth tips in the working surface are aligned in direction of the axis of rotation, wherein, in a view in which the axis of rotation is depicted in a punctiform manner, a penetration plane extends through the pliers mouth, which is depicted in the form of a line in the view, the penetration plane resulting from the fact that it is at a most closed setting of the jaw of the pliers runs at right angles to a longitudinal center line of a longitudinal slot for accommodating an adjustable hinge bolt or runs in such a way that the axis of rotation extends within the penetration plane, with either an intersection point of the longitudinal center plane with the longitudinal center line being selected in the case of the longitudinal slot, or which, with the axis of rotation extending within the penetration plane, the orientation of the penetration plane is selected such that in the course of closing the jaws of the pliers at a specific opening angle, assigned to the free end of the jaws, contact occurs for the first time on opposite working surfaces, with moreover the tips of the teeth end at different vertical distances to the plane of penetration and the teeth also have a bisector that encloses an acute angle with the plane of penetration, with the acute angle on a part of the teeth in the area in which the bisecting angle within a range of the forceps mouth extends between the vertical and the axis of rotation is given and in a further part of the teeth between the vertical and the free end of the pliers mouth.

The invention also relates to pliers with two pliers legs that can be pivoted about an axis of rotation and a pliers mouth, the pliers mouth having working surfaces which are provided with teeth and the pointed teeth are aligned in the direction of the axis of rotation, with the Tooth tips a line can be placed, further subsections of the line form an angle with each other and line lines are opposite in a pliers mouth open position.

State of the art

Pliers of the type in question are known for example from US Pat. No. 5,996,450 A or US Pat. No. 5,752,419 A. The pliers known from US Pat the hinge pin is displaced in the longitudinal slot having the toothing. Finally, the interlocking engagement between the longitudinal slot and the joint bolt is restored by pivoting the pliers legs back. There is a corresponding displacement of the geometric hinge pin axis within half of the longitudinal slot. In the case of the pliers known from US Pat. No. 5,996,450 A, no fixed setting of an opening width is possible.

[0007] Pliers with snap-in, depressible joint bolts for jaw width adjustment are also known, for which reference is made to WO 2008/049850 A1 (US 2010/0064861 A1), in which with the pliers closed the longitudinal slit runs in alignment with the movable pliers arm. Such pliers can also have serrated working surfaces in the area of the pliers mouth. Such pliers are known, for example, from DE 202013101985 Ul. In conventional combination pliers, such a toothed pliers mouth is usually also referred to as a torch hole. In the case of a pair of tongs that cannot be adjusted with respect to the jaw width, the pivot pin axis can be given by a pivot axis of a pivot pin.

Summary of the Invention

In view of the prior art described above, the task is to design a pair of pliers of the type in question in terms of handling and function.

According to a first idea of the invention, a possible solution to the problem is given in the case of a pair of pliers in which it is taken into account that the teeth can be run over by pressing down the hinge bolt to adjust the jaw opening width, the penetrating pliers limb, preferably the movable pliers limb, has an elongated overlapping area, in which the penetrating pliers limb is covered on both sides by the interspersed pliers limb, preferably the fixed pliers limb, wherein the overlapping area also runs essentially at right angles to an adjustment direction of the hinge pin in the longitudinal slot, with a width that 0.5 times or more the maximum adjustment dimension, and with a length that corresponds to 2 times or more the maximum adjustment dimension.

[0010] As a result of the proposed design, ergonomically favorable handling results in a functionally reliable design of the pliers. To cancel the meshing engagement, the pivot pin is preferred Configuration moves in the direction of the hinge pin axis in a release position be. Preferably, such a load for the displacement of the joint bolt zens is solely willful, for example as a result of depression by actuation with the thumb, in particular with the thumb of the hand gripping the pliers. It is not necessary to pivot the pliers legs into the widest possible open position in order to adjust the opening width of the pliers mouth.

The overlapping area can be considered in a closed position of the pliers, more preferably with a smallest setting of the jaw opening width.

If the overlapping areas of the interspersed pliers leg do not run congruently in a plan view of the pliers, in which a geometric longitudinal axis of the hinge pin is shown in a point-like manner, the largest overlapping edge contour of the interspersed pliers leg indicates the overlapping area, with this edge contour can also be put together as an imaginary edge contour over a length of the overlap area from an upper and a lower edge contour, each of which has the greatest degree of coverage.

[0013] Also, as preferred, the penetration area of the interspersed pliers limb can be made of the same material as the pliers head and the gripping area of the interspersed pliers limb.

The hinge pin, which can be actuated by depressing it, can, as before, have a counter-toothing that can be brought into engagement with the toothing of the elongated hole. Two or more, preferably three or more, for example up to five or eight, for example four, six or seven different detent positions can be reached, with a corresponding number of adjustable jaw opening widths of the pliers.

[0015] This actuation of the hinge pin to cancel or to engage the toothing is also made possible in an ergonomically favorable manner by the preferably selected slim design as a result of the selected superimposition in a transition area between the pliers area receiving the hinge pin and the grip sections. The resulting slim design in the area of the overlap also allows the pliers to be handled easily, for example in areas that are difficult to access.

[0016] The overlapping area is more preferably in a pliers leg area that extends essentially in a straight line, preferably in the longitudinal direction, i.e. perpendicular to the adjustment direction, limited by widenings resulting in both pliers legs, so preferably at one end by a widening for forming the Pliers head with the Ge articulated training, and preferably at the other end by an outwardly directed bend of the pliers legs to form the handle area.

[0017] The overlapping area is preferably provided with a width that is essentially constant over the described length. There can be a deviation (reduction or increase) in a width dimension of up to, for example, 2%, but in any case preferably less than 10% compared to a width dimension averaged over the length of the overlapping area. The width of the overlapping area can correspond to 0.5 to, for example, 2 times and the length, for example, to 2 times to further, for example, to 5 or 10 times the adjustment dimension.

The pliers leg sections, particularly in this transition area between the pliers section receiving the hinge pin and the handle sections, can preferably run in the same direction, particularly with respect to a respective center line that is set centrally between the marginal edges running essentially perpendicular to the adjustment direction of the hinge pin. Thus, according to a preferred embodiment, these center lines of the limb sections of the pliers can run essentially parallel to one another. The inclusion of an acute angle of, for example, 1 or 2 degrees up to, for example, 10 or 15 degrees is to be understood as essentially rectified in the sense of the present invention.

With an exemplary maximum adjustment dimension of the pliers legs to one another along the longitudinal slot of about 10 mm, a length of the pliers leg sections running essentially in the same direction, viewed transversely thereto, can be given of, for example, about 20 to about 30 mm.

A possible solution to the task can also be given by the fact that both working surfaces each have teeth in their course from the free end of the jaws to the axis of rotation, which have the alignment of the tooth tips in the direction of the axis of rotation, followed by further ones Teeth in the same working surface, which have the orientation of the Zahnspit zen to the free end of the jaws, or vice versa, wherein further oppositely directed groups of teeth are formed opposite each other on the first and second working surface. The proposed alignments of the groups of teeth result in an advantageous torque transmission to a workpiece held between the jaws, for example a round bolt. The workpiece can be detected in the area of one work surface by a tooth or several teeth aligned towards the free end of the jaws and in the other work surface by a tooth or several teeth aligned towards the axis of rotation. More preferably, an improved torque transmission to the workpiece can result in that it is gripped in the area of one working surface in a transition area between two groups whose teeth are aligned differently, and in the area of the other working surface by a tooth tip pointing in the selected direction of rotation .

The bisecting line relates to the angle between two flanks of a tooth when looking at a longitudinal slot through the pliers mouth. In this regard, the flanks can preferably run in a straight line. However, they can also have a convex or concave curvature. A geometrically straight line from a tooth tip to a tooth base is decisive for the bisector of a curved course. If a tooth base is not given as such, a deepest point between two adjacent teeth can also be used as the tooth base. If, starting from the tooth tip, there is initially a straight flank which then transitions into a curvature, only the straight section of the tooth flank can also be used with regard to limiting the angle for the angle bisector.

In the case of pliers with a pliers mouth having the teeth, a possible solution to the problem can be given by looking at the axis of rotation from a free end of the working surfaces of the pliers mouth a first group of teeth is formed on a first working surface of the pliers mouth, in which the respective bisecting line of the teeth extends inclined starting from the tooth tip and facing away from the pliers mouth to the free end of the jaw, followed by a second group of teeth which extends the respective bisector to the articulated end of the pliers mouth inclined, followed by a third group of teeth, in which the respective bisector in turn extends inclined to the free end of the jaw.

The first group described above does not necessarily have to be the absolute first group of the pliers mouth. In any case, this defined first group is followed by a second and a third group according to the embodiment described above.

Starting from the free end of the working surfaces of the pliers jaws or the free ends of the jaws facing away from the axis of rotation, there are preferably at least three groups of teeth lying one behind the other on the first working surface in its longitudinal extension, with adjacent groups having different extensions and inclinations the bisecting angles have different orientations of the teeth.

[0027]More preferably, corresponding groups of teeth are also formed on the opposite second work surface, preferably also in groups in each case opposite to the groups of teeth of the first work surface. An opposite situation is given in particular when, in the case of a round part or polygon gripped by the pliers, corresponding teeth or groups of teeth act on the part at the same time. In relation to an overall length of a penetration level penetrating the pliers mouth, see also the explanations below, this can be the case, for example, with a part be given with a diameter, possibly the largest, which corresponds to one fourth or one half of the total length mentioned.

Also, in relation to a plane, for example a longitudinal median plane of the pliers, but in any case a penetration plane of the pliers mouth, in the area of the pliers mouth there can be acute angles between the angle bisector and a perpendicular to the plane. In relation to the enforcement plane, there can also be acute angles in the area of the jaws of the pliers between the bisecting line and a line perpendicular to the enforcement plane. The penetration plane can be oriented perpendicular to a longitudinal center line of a longitudinal slot in which a hinge pin can be displaced to adjust the jaw width, as is known, for example, with pliers of the configuration described above, or can also run in such a way that the axis of rotation extends within this plane . Furthermore, the orientation of such a penetration level can be chosen such that in the course of closing the jaws of the pliers in this penetration level, the areas of the working surfaces formed in the area of the free end come into contact for the first time.

The enforcement plane can coincide with the already mentioned longitudinal median plane, but it can also be different thereto.

The geometric longitudinal center line mentioned is given in an adjustment direction of the hinge pin in the longitudinal slot. The perpendicular to this, on which the enforcement plane is oriented, can intersect the longitudinal center line within the extent of the longitudinal slit, but also in the area of an imaginary extension of the longitudinal center line going beyond the boundary of the longitudinal slit. The longitudinal slot, in which the hinge pin can be adjusted, can also be curved. In such a case, the longitudinal center line is also curved, typically as a segment line of a circle with a comparatively large diameter. In this case, the point of intersection results in perpendicularity to a tangent to the longitudinal center line.

The free end is the area of the jaws, which is preferably located beyond a center of the pliers mouth resulting in the longitudinal extension of the jaws, facing away from the axis of rotation. Next, this free end can be given by in the pliers-closed position on the toothed pliers mouth in the direction of the jaw ends subsequent Ar beitsbereiche more of the jaws. These other working areas can also be toothed, but alternatively can also be designed with a smooth surface, for example.

The first contact of the work surfaces in the free end of the jaws can be given by direct contact, for example, tooth tips of both jaws jaws together. In this case, the tongs closed position can also be reached with this first touch. This first contact can also only be provided by a first, simultaneously occurring touch, spaced apart in the direction of the enforcement plane, by one or more teeth of both working surfaces.

[0034] In the course of closing the jaws of a pair of pliers, one work surface can, as it were, if one assumes that the enforcement level is already present here, shift the enforcement level until the required contact also occurs with the other work surface, then at the same time with the first touch, enters. This position of the enforcement level is then, as it were, mentally frozen in the following consideration. The reference the enforcement level is always to be understood in relation to the frozen state.

[0035] The mentioned or mentioned first contacts relate to the teeth of the pliers mouths, which are located in a front area of the pliers mouths associated with the free end of the jaws. In relation to a total length of the penetration plane penetrating the pliers mouth, it is correspondingly preferably the front half of the total length associated with the free end.

There can also be a - first - contact of the penetration plane of envelope surfaces of the toothings, which envelope surfaces are shown in the above-described view as stretched straight lines connecting the tooth tips. This can occur in particular in the case of toothed working surfaces in the area of the free end, which teeth engage in one another in the closed position of the pliers mouth. In this case, the first contact with the enforcement plane by the working surfaces in the area of the free end is given before the closed position is reached, where further in principle the contact of the relevant working surfaces in the enforcement plane can be point or area.

[0037] First of all, without taking the enforcement level into account, it is preferable, viewed from the free end of the working surfaces of the pliers mouth to the axis of rotation, that a first group of teeth is formed on the first working surface of the pliers mouth, in which the acute angle is between the vertical and the axis of rotation is given, followed by a second group of teeth, in which the acute angle respectively between rule the vertical and the free end of the working surfaces of the pliers mauls is given, followed by a third group of teeth whose acute angles are again given between the perpendicular and the axis of rotation.

There are advantageously at least two changes in the tooth alignment with regard to the longitudinal extent of the working surface, with the teeth of the first group tending to point in the direction of the axis of rotation due to the described alignment of the angle halves - viewed in the direction of the pliers mouth - the teeth of the second group tends to point towards the free end of the working surface and the third group again tends to point towards the axis of rotation.

The acute angles can range in magnitude from about 0.5 to about 60 degrees or more, preferably from about 1 to about 50 degrees, preferably with angular ranges between, for example, about 5 to about 25 degrees, or between about 30 and about , within a group 45 degrees, but within another group, for example, between about 3 and about 20 degrees, or between about 25 and about 50 degrees.

At the opposite working surface, two groups of teeth are also formed with alternation in the direction of the teeth as described. A group of the second, opposite working surface can also include so many teeth that it faces several groups, for example two groups, of the first working surface.

The selected alignment of the groups of teeth on both working surfaces can result in different areas of action in the jaws of the pliers, over which, for example, in one area using one or two adjacent groups of appropriately aligned teeth, a favorable left-handed action can be exerted on a workpiece, e.g - wise a screw, can be achieved and offsets another area to this area, for favorable clockwise rotation. Due to the proposed mutual alignment of the groups of teeth, a higher torque can be transmitted compared to any known configurations. A certain degree of clawing of the teeth with the workpiece can be achieved in a manner that is favorable in terms of handling, in which case higher forces can be transmitted in the course of a rotation with the same introduction of force before the non-positive effect on the workpiece is broken off via the teeth of the working surfaces compared to the known solutions.

With regard to the transmission of the torque and the direction of screwing, it is essential that opposing teeth of both working surfaces act on the workpiece.

Furthermore, with regard to pliers with a pliers mouth with teeth, according to a further inventive idea, the object can be achieved in that, based on the lines described, each line has at least two adjoining sections which, pointing to the pliers mouth, form an angle of 170 degrees or less up to, for example, 100 degrees to each other and that these partial sections are opposite partial sections of the other polyline, which also pointing to the jaws of the pliers enclose an angle of 170 degrees or more up to, for example, 190 degrees to each other, and that in each polyline there are two partial sections are included which form an angle of 190 degrees or more to one another when viewed in the same direction.

The proposed arrangement and alignment of the teeth tapering to a point results in a jaw design that is favorable in terms of handling. In this way, the polylines can be preferred for both working surfaces may be elongated in the manner of a sinusoidal shape, having a corrugation trough and a corrugation crest as well as a turning point resulting between the corrugation valley and the corrugation peak in relation to a side view towards the jaw of the pliers. With reference to the enforcement plane, a wave crest of the line of the other work surface is preferably located opposite the wave trough of the line of the one work surface.

As described above in connection with the angular alignment of the teeth, this can advantageously result in an area within one of the jaws of the pliers, which is designed for a left-handed action, for example on a screw or bolt or the like, and for this purpose Viewed in the longitudinal extension of the pliers, another area offsets the clockwise action on, for example, a screw or a bolt.

The above-described line is preferably obtained in a side view or in a cross section through the area of the pliers mouth, in which cross section the geometric pivot axis of the pliers legs is represented as a point, by a straight connection of the tooth tips to one another.

The characterizations described with regard to the angle halves and with regard to the lines can also be realized at the same time on the pliers mouth.

The features of the independent claims described above are important both individually and in any combination with one another, with further features of an independent claim can be combined with the features of a further independent claim or with features of several independent claims, also with only individual features of one or more of the further independent claims.

In particular, the features relating to the design of teeth of toothed working surfaces in the jaws of the pliers in otherwise known types of pliers, such as in particular combination pliers (cf., for example, WO 2017/134074 A1 or US 2019/00392141, each for example Figure 11) or water pump pliers (see WO 2008/049850 A1 or US 2010/0064861 A1 mentioned at the outset) can also be implemented.

Further features of the invention are explained below, also in the description of the figures, often in their preferred association with the subject matter of claim 1 and/or the further independent claim or with features of further claims. However, they can also be of importance in an assignment to only individual features of claim 1 and/or the further independent claim or the respective further claim or in each case independently.

Thus, according to a preferred embodiment of the adjustment with interpenetrating and interspersed pliers limbs in the course of the adjustment from a smaller to a larger jaw opening width with regard to the handle-side pliers limb sections, at least initially there can be a larger superimposition of the pliers limb sections in terms of area. The area of the pliers leg sections that is slimmed down overall offers a good support of the leg sections against one another, preferably in every jaw width position. Improved handling of the pliers results. Of the The effect of slimming down this area is preferably even reinforced in the case of larger mouth opening widths. The extent of the superposition - be considered in a direction transverse to the center lines of the pliers legs sections - can increase according to a preferred embodiment with increasing the opening width. Correspondingly, with a large opening, there is an enlarged support surface for the pliers leg sections on one another. The adjustment to a larger opening width of the pliers mouth can be made possible by finger pressure on both pliers legs in the area of the superimposition of the pliers legs and thereby supporting Ver push towards each other.

If a jaw opening width is exceeded, which does not correspond to the adjustable smallest jaw opening width, with further displacement of the pliers legs to take an even larger jaw opening width, a reduction in the superimposed position of the pliers leg sections can occur. Thus, with a displacement of the pliers legs after the latching in the slot has been released, from a position with the smallest jaw opening width to a position with the largest possible jaw opening width, a jaw opening area can be traversed, in which a superimposition of the pliers leg sections with the greatest surface area is achieved.

In a preferred embodiment, the pliers shank sections are at least partially superimposed in each open mouth position of the pliers.

[0054] Also, as is preferred, the width of the pliers in the region of the superimposed position can initially be reduced, starting from a closed pliers when adjusting to a larger jaw opening width, in particular in the case of a Adjustment of the pliers starting from a smallest jaw opening width in the direction of a larger jaw opening width. The smallest width of the pliers in the area of the above-described pliers leg sections is given with the greatest possible superimposition.

The width in the area of the area that has been slimmed down in this way is also preferably in every jaw opening width—in particular in relation to a jaw closed position—significantly less than the width in the area of the jaw jaws viewed in the same direction and more preferably in the area of the pliers legs. The greatest width in the area of the above-described pliers leg sections can, for example, correspond to approximately 0.3 to 0.8 times, possibly 0.4 to 0.6 times the width in the area of the jaws or the pliers legs. This results in the waisting described in the area of the pliers leg sections.

[0056] In a further embodiment, the stationary pliers arm can have a pit designed for pressure actuation of the hinge pin, with a hinge pin axis preferably being arranged eccentrically with respect to a geometric center axis of the pit. The pit results in a favorable finger rest, in particular a thumb rest, for further favorable actuation of the hinge pin. The pivot pin is preferably linearly displaced in the direction of the bottom of the pit in order to eliminate the meshing engagement.

The hinge pin axis can be offset in the direction of adjustment of the jaws of the pliers to the center axis of the pit. This can result in an offset to the above-described longitudinal center plane. The offset arrangement of the hinge pin axis contributes in an advantageous manner to a slim overall design of the pliers. [0058] The jaws can also have working areas that are provided with teeth. This can be a toothing of the type described above.

The working areas can be deepened with regard to a longitudinal extent of the pliers mouth towards the pliers tip, so that when the pliers or the pliers mouth are closed, an opening remains in a front view of the pliers mouth. Accordingly, there is a front gripping opening in the area of the jaws of the pliers, which preferably has a toothed contour. In a way that is favorable in terms of handling, the proposed pliers can also be used to grip an object from the front and rotate it, for example.

With regard to a specific design of the pliers mouth, in particular special with regard to an advantageous torque transmission, can be provided with regard to the design and arrangement of the teeth of the first working surface according to a further development that a fourth group of teeth is attached to the third group of teeth connects, in which the respective bisecting line of the teeth to the joint-side end of the pliers mouth tends to extend ge.

Thus, acute angles of the fourth group, between the angle half and the perpendicular to the plane—seen in the direction of the jaws of the pliers—can be given between the perpendicular and the free end of the working surfaces of the jaws of the pliers.

This results in a further change in the tooth alignment of this fourth group compared to the third group of teeth, so that viewed over the length of the first working surface there are preferably four groups of teeth are provided. The tooth tips of the teeth in the first and third groups preferably tend towards the axis of rotation, viewed in the direction of the jaws of the pliers, while the tooth tips of the teeth in the second and fourth groups preferably tend towards the free end of the first working surface.

Two sets of teeth tending to be substantially in the same direction are spaced longitudinally of the work area by a set of teeth tending to be oppositely directed thereto.

The acute angles of the teeth of groups which tend to be in the same direction, for example first and third groups or second and fourth groups, can be substantially the same or can be within a substantially same range of values. In this regard, different value ranges of the acute angles of two groups with essentially the same aligned teeth can be given, for example one group with a value range of the acute angle of about 5 to about 25 degrees and another group with a value range of, for example, about 30 to about 45 Degree.

[0065] A partial overlapping of the value ranges can also be present. For example, a value range can be between about 5 and about 35 degrees and the value range of the further group of aligned teeth can be between about 30 and about 45 degrees, for example.

Groups of teeth with a specific orientation of the bisecting line or angular orientation with respect to the plane are preferably located opposite one another. In relation to a perpendicular projection of these groups onto the plane described, there can be a complete or even partial overlap, for example by a third or more, up to for example two-thirds or more of these opposing groups. A group of teeth on the first working surface, whose tooth tips tend to point in the direction of the axis of rotation, can correspondingly be at least partially opposite a group of teeth on the second working surface, whose tooth tips also tend to point in the direction of the axis of rotation.

The tooth tips can be arranged offset to one another through the plane with regard to the opposite position, based on the vertical. The teeth of both working surfaces can be arranged "with a gap" in which arrangement the tooth tip of a tooth on the first working surface, viewed perpendicularly to the plane, essentially points in the direction of a tooth base between two teeth on the second working surface.

In a further embodiment, the second working surface of the pliers mouth can be provided with a first group of teeth, in which the respective angle bisector of the teeth extends inclined from the tooth tip and away from the pliers mouth to the free end of the jaw , followed by a second group of teeth, in which the respective bisecting line is inclined toward the joint-side end of the pliers mouth, it stretches. The acute angle of the first group of the second working surface resulting from the inclination can in each case - viewed within the jaws of the pliers - be given between the vertical and the axis of rotation and in the second group of the same working surface between the vertical and the free end of the working surfaces of the pincer mouth. [0070]More preferably, the second group of teeth can have two subgroups of teeth, a first subgroup with a small inclination or small acute angles and a second subgroup with a large inclination or larger acute angles. The second group of teeth is preferably assigned to an end region of the second working surface which faces the axis of rotation. A further subdivision of the second group into two subgroups results in a preferred arrangement in which the subgroup with a smaller inclination or smaller acute angles can face the transition area of the second group into the first group of the second working area, which essentially faces the free end .

A subset may include one, two or more teeth.

The values of the larger acute angles of the second subgroup can, as also preferably, correspond to about 1.5 to 100 times, further for example about 3 to 50 times the values of the smaller acute angles of the first subgroup .

Thus, the first subgroup of the second group in the area of the second work surface can have acute angles in a value range of, for example, about 0.5 degrees up to 10 degrees, further, for example, about 1 to about 5 degrees, and the subsequent second subgroup can have acute angles in a value range of, for example, about 10 to about 45 degrees, further, for example, about 15 to about 40 degrees.

[0075]An angle bisector, in particular in the case of a tooth, can also be present in a transition area between two consecutive groups of the vertical essentially coincide, so that there are no angles or a zero-degree angle between them.

According to a preferred development, it can be provided that a round bolt both in a front area facing the free end of the jaws and in a rear area of the pliers mouth facing the axis of rotation of one or more oppositely directed teeth of the first or second work surface, with teeth from different groups of teeth engaging with the round bolt in the front and rear area, with the round bolt in the rear area of two teeth each assigned to one of the opposite work surfaces, the tips of the teeth of which running in opposite directions, can be detected and can also be detected in the front area by two teeth each assigned to one of the opposite working surfaces, the tooth tips of which run in opposite directions.

For a possible diameter of such a round bolt, reference is made to the explanations above.

The above-described teeth of a work surface for the double detection of the workpiece, for example a round bolt, in the front and in the rear area are more preferably aligned in opposite directions.

Thus, the tooth of the first working surface assigned to the rear area can be inclined in the same direction as the tooth of the second working surface assigned to the front area.

[0079] In addition, it can be provided that the double socket of the round bolt is possible in any case if the round bolt has a diameter knife, which has a pliers jaw opening of approx.

10 degrees required.

Such detection can also be given in other opening angles of the pliers mouth, for example with a pliers mouth opening of up to 30 or 45 degrees, moreover preferably also in an open position of less than 10 degrees, so on depending on the jaw design as a whole, for example, up to a completely closed position of the jaws. The respective pliers mouth opening is dependent on the diameter of the workpiece, for example a round bolt, as well as the gripping position in the pliers mouth, further depending on whether the workpiece is gripped in the front, remote area in the pliers mouth or in the rear area, close to the joint. Locating a round bolt in the front portion of the tong jaw may require a smaller jaw opening than locating a round bolt of the same diameter in the rear portion.

Advantageously, the alignment of the tooth tips can be predetermined by a different length of tooth flanks of the respective tooth, with an alignment in the direction of the axis of rotation the longer tooth flank being formed on the side of the tooth tip facing away from the axis of rotation and with an alignment of the Tooth tip to the free end of the jaws, the longer tooth flank is formed on the side of the tooth tip that faces away from the free end of the jaws.

The tooth flanks result in a view in which the axis of rotation is shown as a point on both sides of the tooth tip, starting from the Tooth tip to a tooth base, in which there is a transition to the next following tooth and its tooth flank.

In the view described, the tooth flanks can run in a straight line or else, optionally in sections, be curved. In the case of a curved flank profile, the length of the tooth flank can be defined by a straight line connecting the ends of the tooth flank. In addition, reference is also made to the explanations above.

The ranges or value ranges or multiple ranges specified above and below also include all intermediate values with regard to the disclosure, in particular in 1/10 steps of the respective dimension, i.e. possibly also dimensionless. For example, the specification 0.5 to 3 times also includes the disclosure of 0.6 to 3 times, 0.5 to 2.9 times, 0.6 to 2.9 times, etc., the revelation of 170 degrees or less also the revelation of 169.9 degrees or less, etc., the revelation of 5 to 25 degrees also the revelation of 5.1 to 25 degrees, 5 to 24.9 degrees, 5.1 to 24.9 degrees, etc. On the one hand, this disclosure can be used to limit a specified range limit from below and/or above, but alternatively or additionally to disclose one or more singular values from a respective specified range.

BRIEF DESCRIPTION OF THE DRAWING [0085] The invention is explained below with reference to the accompanying drawing, which, however, only shows exemplary embodiments. A part that is only explained with reference to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment due to the special feature highlighted there, is therefore also applicable to this further exemplary embodiment. tion example as at least possible existing part described. The drawing shows:

Fig. 1 shows a perspective view of a pair of pliers of the type in question, relating to a first embodiment;

2 shows the pliers in view;

3 shows the side view of the pliers according to arrow III in FIG. 2;

4 shows the rear view of the pliers;

FIG. 5 shows the enlargement of area V in FIG. 2;

FIG. 6 shows the side view towards the pliers according to arrow VI in FIG. 5;

FIG. 7 shows the enlargement of area VII in FIG. 6;

FIG. 8 shows the greatly enlarged view of area VIII in FIG. 2;

FIG. 9 shows an enlarged representation of a pair of pliers mouths corresponding to FIG. 8; FIG.

FIG. 10 shows the enlargement of the area X in FIG. 9, with only a dot-dash representation of one of the jaws;

FIG. 11 shows a representation corresponding to FIG. 10, but with a single dash-dotted representation of the other jaw; FIG. 12 shows the enlargement of area XII in FIG. 9, with only one of the jaws shown in broken lines;

FIG. 13 shows a representation corresponding to FIG. 12, but with a single dash-dotted representation of the other jaw;

FIG. 14 shows the enlarged section along the line XIV-XIV in FIG. 4;

FIG. 15 shows an illustration essentially corresponding to FIG. 14, showing a joint pin position for canceling a latching; FIG. 16 shows the section along the line XVI-XVI in FIG. 3, relating to a smallest jaw opening width of the pliers;

FIG. 17 shows a sectional illustration according to FIG. 16, relating to a mean jaw opening width of the pliers;

FIG. 18 shows a further sectional illustration corresponding to FIG. 16, relating to a maximum jaw opening width of the pliers;

FIG. 19 shows an illustration corresponding to FIG. 5 when a workpiece is gripped in a front area of the jaws of the pliers;

FIG. 20 shows an illustration corresponding to FIG. 19 when a workpiece is gripped in a rear area of the jaws of the pliers;

21 shows a view of a pair of pliers in a second embodiment; FIG. 22 shows the enlargement of area XXII in FIG. 21;

23 bis

Fig. 26 schematic representations of alternative forceps jaws

floor plan shapes.

DESCRIPTION OF THE EXEMPLARY EMBODIMENTS A pair of pliers 1 in the form of assembly and/or gripping pliers is shown and described, initially with reference to FIGS.

In the figures 21 and 22 such a pair of pliers 1 is shown in the manner of a conventional pair of pliers.

The pliers 1 have two pliers limbs 3 and 4 which intersect in a hinge pin 2 with a hinge pin axis x. According to the exemplary embodiments shown, the pliers limb 3 is to be regarded as a fixed pliers limb and the pliers limb 4 as a movable pliers limb which rotates about the hinge pin axis x to open and close a pliers mouth 7 resulting between the jaws 5 and 6 of the pliers limbs 3 and 4 is pivotable relative to the fixed tongs limb 3 .

The jaws 5 and 6 result on the pliers legs 3 and 4 on one side of the hinge pin 2, while the jaws 5 and 6 facing sections of the pliers legs 3 and 4 handle sections 8 and 9 form. According to the first exemplary embodiment illustrated in FIGS. 1 to 13, the stationary tong limb 3 can be designed in the shape of a fork in the area where it crosses the movable tong limb 4, for surrounding on both sides of the movable tong arm 4 passing through the stationary tong arm 3 in the area of a slot opening 10 that results for this purpose.

The pivot bolt 2 is accommodated in a bore-like receptacle 12 in a fork section 11 of the fixed tongs arm 3, penetrating a longitudinal slot 13 in the crossing area of the movable tongs arm 4 as well as a bore-like bore further developed in an axial extension to the bore-like receptacle 12 Opening 14 in the other fork section 15 of the fixed tongs limb 3.

The longitudinal slot 13 has an extension S along a longitudinal center line 50, which when the pliers 1 are closed, for example as shown in FIG to a longitudinal extent L of the pliers 1 in total.

The longitudinal slot 13 can, as is also preferred, be formed with a toothing 16 along at least one longitudinal edge, more preferably along both longitudinal edges, for interaction with a counter-toothing 17 formed on the outside of the wall of the articulated bolt 2.

This counter-toothing 17 extends, starting from a pivot pin base 19 located in the receptacle 12 of the fork section 11, over approximately half the extent of the pivot pin 2 in the direction of the pivot pin axis x, so that in a basic alignment of the pivot pin 2, for example according to FIGS Representations in Figures 14 and 16, a Verzahnungsein reached between the hinge pin 2 and longitudinal slot 13 is given. In this basic orientation, the hinge pin 2 is preferably loaded by a spring, for example a leaf spring 18 . The leaf spring 18 can, as is also preferred, be anchored in the area of the fork section 11 of the fixed pliers leg 3 and act with its free end on the joint bolt floor 19 in such a way that the joint bolt 2 has a stop limit in the direction of the toothing engagement is charged.

In this basic orientation, the hinge pin 2 also protrudes beyond the opening edge, pointing axially outwards, of the further opening 14 formed in the fork section 15, forming a plate-like actuating projection 20.

The leaf spring 18 is preferably arranged starting from a contact area at one end on the associated end of the hinge pin, the hinge pin base 19, directed towards the overlapping area and is fastened in the overlapping area to the stationary pliers arm.

A dome-shaped pit 39 can be formed in the fork section 15 surrounding the above-described opening 14 in the fork section 15 . This pit 39 is preferably used in the manner of a thumb pit when the hinge pin 2 is actuated the alignment of the longitudinal slot 13 given adjustment direction r of the jaws of the pliers 7 is seen before. In this way, a related offset dimension a can result, which ches about 0.3 to 0.8 times, further about 0.5 times the diameter of the bolt can correspond (see Figure 2).

To change a jaw opening width w between the jaws 5 and 6, the pivot bolt 2 must first be displaced in the axial direction, possibly against the restoring force of the leaf spring 18, such that the toothing engagement with the longitudinal slot 13 is eliminated. For this purpose, as is also preferred, the hinge pin 2 can be subjected to a pressure load in the area of the actuating projection 20, for example by thumb actuation. In the axially displaced position of the pivot pin 2 as shown in FIG. 15, the toothing engagement is canceled and a linear displacement of the movable tongs leg 4 relative to the fixed tongs leg 3 in the adjustment direction r is made possible.

[00101] In this shifted position of the hinge pin 2 , its base 19 can be moved in the direction of the hinge pin axis x into a position at a distance from the associated surface of the fork section 11 . The end of the articulated bolt 2 facing away from the actuating projection 20 protrudes from the receptacle 12 (compare FIG. 15).

16 to 18 show the pliers 1 of the first embodiment with differently set jaw opening widths w, with FIG. 16 showing the smallest possible jaw opening width w by way of example and FIG. 18 showing the largest possible jaw opening width w by way of example, while FIG. 17 shows an intermediate position indicates.

In a further embodiment of the first exemplary embodiment described, viewed in the longitudinal extension L of the pliers 1, there are between the crossing fork sections 11 and 15 and their grip sections 8 and 9 tong leg sections 21 and 22 with, in particular in the closed position of the tongs, for example according to FIG. 16, a substantially parallel course. These pliers leg sections 21 and 22 preferably run essentially parallel to one another in the closed position of the pliers, more preferably in parallel alignment with a longitudinal center plane E penetrating the center of the pliers mouth 7. This longitudinal center plane E equally penetrates both pliers legs 3, 4, particularly in the region of the pliers leg sections 21 and 22

Viewed in the longitudinal extension of the pliers 1, the pliers leg sections 21 and 22 are essentially delimited by widenings resulting from these sections, such as gripping on the side by a cranked area 40 or 41 and on the opposite side by the pliers head 42 with the longitudinal slot 13 or with the fork sections 11 and 15 forming widening (compare in particular Figure 16).

In the closed position of the pliers jaws described, the edge edges 43 and 44 delimiting the shank section 21 preferably run perpendicularly to the longitudinal slot 13 or to the adjustment direction r, more preferably parallel to one another and beyond that preferably parallel to the other edge edges 45 and 46 of the tong leg section 22.

The penetrating, movable pliers leg 4 is covered on both sides by the interspersed, fixed pliers leg 3 in an overlapping area U (see the hatched areas in FIGS. 16 to 18 for better illustration). The overlap is provided essentially in the area of the pliers leg sections 21 and 22 . A total length d of the overlapping area U considered in the direction of the longitudinal extent L of the pliers 1 can be approximately 2 to 4 times the possible adjustment dimension f of the hinge pin 2 resulting transversely to the longitudinal alignment of the pliers leg sections 21 and 22 in the Longitudinal slot 13 correspond. The width g in the overlapping area U between the edge 45 of the movable limb 4 and the edge 44 of the fixed limb 3 (see Ligur 16) or - depending on the mouth width setting - between the edge 43 of the fixed limb 3 and the edge 46 of the movable limb 4 ( compare ligures 17 and 18) can speak about the 0.5 to 2 laughs of the possible transverse to the longitudinal alignment of the pliers leg sections 21 and 22 resulting adjustment dimension f of the hinge pin 2 in the longitudinal slot 13 ent. In addition, the width g of the overlapping area can correspond approximately to 1.5 to 4 times the relevant length d.

The width g of the overlapping area U can initially increase from a smaller mouth opening width w to a larger mouth opening width w, for example starting from the smallest mouth opening width w according to Ligur 16 to an intermediate position of the adjustable mouth opening according to Ligur 17, in which possible intermediate position an at least approximately complete overlap of the pliers leg sections 21 and 22 can be given. The length d, on the other hand, can be at least approximately the same in all positions of the jaw opening width of the pliers 1--related to the respective closed position of the pliers jaws.

With increasing overlap width g, the width h of the pliers 1 in the area of the pliers leg sections 21 and 22 decreases accordingly 0.6 laugh, continue about can correspond to 0.5 times the length d. A possible maximum width h with only partial overlapping of the pliers leg sections 21 and 22 can also correspond, for example, to approximately 0.6 to 0.9 times, further approximately 0.75 times the above-described length d of the pliers leg sections 21 and 22 .

Overall, the result is a slim design of the pliers 1, particularly in the area of the pliers shank sections 21 and 22. The pliers shank sections 21 and 22 preferably retreat behind the formation of the jaws 5 and 6 in every plier mouth width setting. The width dimension k of the pliers 1 in the area of the jaws 5 and 6, viewed perpendicularly to the longitudinal center plane E - in relation to the closed position of the pliers jaws - corresponds to at least 1.3 times to about 2 times the width of the jaw opening in each position width h viewed in the same direction in the area of the pliers leg sections 21 and 22 in the overlapping area U. The jaws 5 and 6 have working surfaces 23 and 24, which in the first exemplary embodiment shown in FIGS Toothing 25 and 26 are formed. Between these teeth 25 and 26 there is also a jaw opening 27 of the pliers mouth 7 in a closed position of the pliers, for example according to FIG. whose tooth tips 29 or the tooth troughs 30 resulting between the teeth 28 extend essentially in the direction of the hinge pin axis x, which forms an axis of rotation. The jaw of the pliers 7 preferably leaves a jaw opening 27 extending transversely and longitudinally to the longitudinal center plane E, even in a smallest closed position of the pliers according to FIG. In a view in which the axis of rotation x is shown as a point and the longitudinal center plane E as a line, the pliers mouth 7 is initially delimited on both sides of the longitudinal center plane E by the working surfaces 23, 24 of the jaws 5, 6. The pliers mouth also has an enforcement plane D, compare the magnifying glass representation in FIG. 5, which can coincide with the longitudinal center plane E, but does not have to coincide. If the jaws of the pliers are closed further after the creation of the penetration plane D as defined, the embodiment corresponds to the longitudinal center plane E.

In the illustrated embodiment, with a pliers jaw 7, in the position according to the magnifying glass representation of FIG. Ultimately, however, only the rules explained above and below are relevant with regard to the extension. Here, the penetration plane D can result from the fact that it runs at a right angle to the longitudinal center line 50 of the longitudinal slot 13 when the pliers mouth 7 is set the most closed, with an intersection point P of the penetration plane D and the longitudinal center line 50 resulting (compare Figure 5) .

In an embodiment according to FIGS. 21 and 22, the axis of rotation x preferably runs in the penetration plane D, compare the magnified view of FIG. 21, and in the exemplary embodiment also coincides with the longitudinal center plane E. A maximum length of the enforcement plane D mentioned in the context of the application relates to a dimension A from the joint-side end of the jaw opening 27 to the point at which a tooth first touches; compare this to the magnified view in FIG. 5.

Furthermore, the alignment of the enforcement plane D, starting from the point P, is selected in such a way that at this enforcement plane D in the course of closing the pliers mouth 7, both working surfaces in the free end 48 of both jaws 5 and 6 come into contact for the first time, for example by the tips of the teeth in an end region of the jaws adjoining the jaws of the pliers 7--viewed from the axis of rotation x. As is preferred, this first contact can be reached before the jaws have reached a closed position. The enlarged view in FIG. 5 shows this contact position—in contrast to the closed position in FIG. 5, which is otherwise shown. At least one tooth of each jaw 5 and 6 is in linear contact with the enforcement plane D.

Referring to a side view of the pliers 1, for example according to FIG. The tooth flanks 47 and 47', which are straight in the view, enclose an angle with one another. In the greatly enlarged representations of Figures 10 to 13, in which for the sake of clarity one jaw is shown only in dot-dash lines, bisecting lines Q are drawn in the middle of the tooth flanks 47 and 47' of a tooth 28, each of which extends to a tooth tip 29 in the the same point as the bisecting line Q intersecting, perpendicular to the enforcement plane D aligned perpendicular N rich in the Be, in which the bisecting line Q within the pliers mouth 7 he stretches, enclose an acute angle d or e. As can be seen in particular from FIGS. 9, 11 and 13, there are two groups G5 and G6 of teeth 28 on the jaw 5 with different orientations of the respective acute angles d or e. Viewed from a free end 48 of the jaw 5 facing away from the axis of rotation or hinge pin axis x, or the relevant working surface 23 towards the hinge pin axis x, this second working surface 23 has a first group G5 of teeth 28 whose acute angle d arise between the perpendicular N and the hinge pin axis x.

Starting from the tooth tip 29, the bisecting lines Q of the teeth 28 of this group G5 extend away from the pliers mouth 7 in the direction of the free end 48 of the jaw 5 with an increasing inclination.

The acute angle α of a tooth 28 in group G5 can be, for example, about 20 to about 50 degrees, further, for example, about 25 to about 40 degrees. Pointing into the pliers mouth 7 tooth tips 29 of this first

Group G5 of the jaws 5 are directed inside the pliers mouth 7 in relation to the side view in the direction of the hinge pin axis/axis of rotation x. There is a corresponding sweep of the teeth 28 in the direction of the hinge pin axis/axis of rotation x. Starting from the free end 48, the vertical distance b of the tooth tip 29 to the penetration level D increases step by step within the group G5. Thus, according to the exemplary embodiment shown, starting from the free end 48, the distance b can be doubled from tooth to tooth. This group G5 is followed by the second group G6, with teeth 28, the acute angles e of which arise between the perpendicular N and the free end 48, or with angle bisectors Q, which, starting from the tooth tips 29, deviate towards the jaw of the pliers 7 in the direction of the hinge pin axis x falling inclined.

This second group G6 can in turn, as is also preferred, be divided into two subgroups G6-1 and G6-2. The acute angles e of the subgroup G6-1 adjoining the first group G5 are selected to be significantly smaller than the acute angles e of the subgroup G6-2 adjoining this subgroup G6-1 in the direction of the axis of rotation x. Accordingly, in the area of subgroup G6-1 there is a lesser downward trend than in subgroup G6-2.

With respect to the first subgroup G6-1 of the second group G6, for example, there can be acute angles between about 0.5 (or less, up to possibly approximately 0 degrees) and about 10 degrees, further for example about 1 to about 5 degrees, and with respect to the second subgroup G6-2, for example, acute angles e between about 10 and about 45 degrees, further, for example, about 15 to about 40 degrees. The angles e of the second subgroup G6-2 can correspond to about 1.5 to about 100 times, further for example about 3 to about 50 times the acute angle e of the first subgroup G6-1.

Starting from the tooth 28 of the second group G6 or the first subgroup G6-1, which immediately follows the first group G5, the vertical distance b of the teeth 28 to the enforcement plane D can be gradually increased in the direction towards the axis of rotation x lose weight. Since at the distance b of the first group G5 directly subsequent Tooth 28 of the second group G6, for example, be selected to be 1.2 to 1.7 times greater than the distance b of the tooth 28 of the first group G5, which is directly adjacent to the second group G6 in the direction of the free end 48.

In the direction of the axis of rotation x facing the last tooth 28 of the second group G6 from tooth to tooth, a reduction in the respective distance b to about 0.5 to about 0.8 times the distance b of the in Result towards the free end 48 immediately adjacent tooth 28 of the same group G6.

With regard to the working surface 23 of the jaw 5, starting from the free end 48 towards the axis of rotation x, there can initially be an almost continuous increase in the distance b in the area of the group G5, followed by the transition to the second group G6 from one preferably approximately continuous decrease of the distance b.

The tooth tips 29 of the second group G6 of the jaw 5 are directed towards the free end 48 with reference to the side view, resulting in a corresponding sweeping of the teeth 28 towards the pliers tip 34.

According to the exemplary embodiment shown, the working surface 24 of the jaw 6 preferably has four groups G1 to G4 of teeth, which in the longitudinal extent L of the working surface 24, starting from the free end 48 in the direction of the hinge pin axis/axis of rotation x with the Group Gl starting over the groups G2 and G3 up to the group G4 are formed in a row, with each group change a change in the orientation of the acute angles d and e or the inclination in the direction tion to the free end or the axis of rotation x (compare in particular Figures 9, 10 and 12).

The acute angle d of the groups Gl and G3 can each adjust between the vertical N and the axis of rotation x, while in the groups G2 and G4 these acute angles e between the vertical N and the free end 48 result. Correspondingly, in the groups Gl and G3 there is an inclination of the bisecting line Q away from the pliers mouth 7 towards the free end and in the groups G2 and G4 towards the axis of rotation x. The acute angle α of a tooth 28 in group GI can be, for example, about 5 to about 30 degrees, further, for example, about 10 to about 20 degrees. Compared to this group G1, the acute angles in group G3 can be selected to be at least partially larger. In this regard, an acute angle d in group G3 can be chosen to be between about 20 and about 60 degrees, for example, further for example between about 30 and about

45 degrees.

The acute angle e of a tooth 28 in the group G2 can move in terms of values in approximately the same range as described with regard to the acute angle d of the first group G1, but this acute angle e results on the opposite Angle d on the opposite side of the vertical N. This group G2 can be at least partially larger than the acute angles in the group G4. A range of values for the acute angle e of group 4 can preferably result, as is described with reference to the acute angle d of group G3. As shown, there can also be two areas CI and C2, each composed of a group with acute angles d and an adjacent group with acute angles e, which acute angles d and e of these two groups are the same or have approximately the same value ranges. In the exemplary embodiment described, a first region CI is composed of groups G1 and G2, and a second region C2 is composed of groups G3 and G4.

As can also be seen, the distances b in the area C2, ie in the area of the groups G3 and G4, are selected to be essentially larger than in the first area CI.

While in relation to the working surface 23 of the other jaw 5 the distances b between the tooth tips 29 and the penetration level D result in the free space of the pliers mouth 7, in the area of the opposite working surface 24, particularly in the area of the first group pe Gl, on the other hand, result in negative distances b, due to the extension of the respective tooth 28 beyond the penetration plane D. Accordingly, a distance b results, measured along the perpendicular N within the tooth 28, starting from the tooth tip 28 in the direction of the tooth trough 30. The distance dimension corresponds to an overhang of the tooth 28 beyond the penetration level D, with such a free overhang beyond the penetration level D possibly only being reachable in the smallest jaw opening width shown in Figure 9 in the closed position of the pliers can. Such an overhang (distance b) is preferably in the low 1/10 mm range, for example in a range of up to 0.5 mm.

In particular, starting from the transition from the first group G1 to the second group G2, there is a gradual increase in the distance b between the teeth 28 of the groups G2 and G2 in the direction of the axis of rotation x, viewed up to the transition from the group G3 to the group G4 G3 and optionally the tooth 28 of the fourth group G4 immediately following the third group G3. The increase in value from tooth to tooth within the second group G2 can turn out to be greater than the increase from tooth to tooth within the third group G3.

Thus, in the area of the second group G2 from tooth to tooth, the respective distance b can increase by about 1.5 to about 2 times the distance b of the tooth 28 immediately adjacent in the direction of the free end 48 of the same result in group G2. The distance b from tooth to tooth in the third group G3 can be increased by about 1.2 to about 1-5 times the distance b from the tooth 28 immediately adjacent in the direction of the free end 48 of the same group G3.

[00142] A gradual reduction in the distance b is preferably obtained essentially solely in the area of the fourth group G4. From tooth to tooth - viewed starting from the transition from the third group G3 to the fourth group G4 in the direction of the axis of rotation x - a reduction in the respective distance b by about 1.5 to about 2.5 times the distance b of the tooth 28 immediately adjacent in the direction of the free end 48 of the same group G4. The tooth tips 29 of the first and third group G1 and G3 of the jaw 6 are directed with respect to the side view in the direction of the joint bolt axis x, which results in a corresponding sweeping of the teeth 28 in the direction of the handle sections 3 and 4 . The tooth tips 29 of the second and fourth groups G2 and G4, on the other hand, are directed towards the free end 48 with respect to the side view. Accordingly, the teeth 28 are swept in the direction of the tip 34 of the pliers.

Groups of teeth 28 of both working surfaces 23 and 24 or both jaws 5 and 6 with a specific angular orientation (angle d or e) are arranged at least partially opposite one another with respect to the longitudinal center plane E or penetration plane D. With reference to a vertical projection of the groups along a perpendicular N to the longitudinal center plane E or enforcement plane D, there is preferably partial overlap with regard to group Gl of the first work surface 24 and group G5 of the second work surface 23, while group G6 of the second work surface 23 overlaps with the aligned teeth 28 of the groups G2 and G4 of the first working surface 24 and with the oppositely aligned tooth tips 29 having the third group G3. Also preferred is a staggered arrangement of the tooth tips 29 on the working surfaces 23 and 24 along the penetration plane D, in particular in the closed position of the pliers jaws shown, for example, in FIG. Thus, in a preferred perpendicular projection to the longitudinal center plane E of a tooth tip 29 of one working surface, essentially a tooth trough 30 lies opposite the working surface.

With reference to a side view of the pliers 1 according to FIG. 8 or a cross section, for example according to FIG. 16, in which side view or in which cross section the joint pin axis x as a point, a line Z and Z′ connecting the tooth tips 29 of each toothing 25 and 26 can result in linearly stretched partial sections T between two tooth tips 29 that essentially follow one another in the longitudinal extension L. A wave-like line Z or Z′ can result overall, with—viewed outwards from the mouth opening 27—a wave crest 31 and a wave trough 32, with approximately mirrored to the longitudinal center plane E or penetration plane D Wave crest 31 of one polyline Z, Z′ preferably lies opposite a trough 32 of the other polyline Z′, Z′.

In the transition from a wave crest 31 to a wave trough 32 of a line Z or Z', there is a transition 33.

Thus, in the area of a wave crest 31, there are in any case two adjoining subsections T of the line Z or Z′, which enclose an angle a of 170 degrees or less pointing to one another and to the pliers mouth 7, for example with respect to the line Z one Angle a of about 150 degrees or 165 degrees, further, for example, with respect to the polyline Z', an angle a of about 130 degrees or 170 degrees.

In the area of the wave troughs 32, there can be included angles ß of 170 degrees or more between two subsections T adjoining one another in the direction of the polyline Z or Z′; Polyline Z' about 185 degrees. In the area of the transition 33, there can, as is also preferred, in each line Z or Z′, two consecutive subsections T result, which preferably enclose an angle g of more than 190 degrees to one another pointing in the direction of the pliers mouth 7. more preferably, for example, an angle g of about 195 degrees with respect to the polyline Z and more preferably, for example, with respect to the polyline Z' an angle Y of about 200 degrees.

[00151]Limited by the lines Z and Z', a diamond-shaped jaw opening area M can result overall, for example in the smallest jaw opening width w, in the closed position of the pliers jaws, for example as shown in FIG.

The tooth flanks 47 and 47' of the teeth 28 are more preferably aligned at an angle to one another in such a way that with respect to the area of the shaft mountains 31 of both working surfaces 23 and 24 there is an arrowing backwards in the direction of the hinge pin axis x and in the area of the wave troughs 32 has a tendency to sweep in the direction of the tip of the pliers 34. In the area of the transitions 33, a neutral alignment of the teeth 28 is essentially seen before.

The alignment of the tooth tips 29 can also be determined by the different lengths of the tooth flanks 47 and 47' of a tooth 28. As can be seen, for example, from Figures 10 to 13, with a tendency to align a tooth tip 29 in the direction of the free end 48, the longer tooth flank 47 is formed on the side of the tooth 28 facing the axis of rotation x and thus on the side facing away from the free end 48. With a tendency towards alignment of the tooth tip 29 in the direction of the Axis of rotation x, on the other hand, it is the shorter tooth flank 47 ′ which is formed on the side facing away from the free end 48 .

This advantageously results in a possible subdivision of the pliers mouth 7, in particular when using the pliers 1 to grasp a body to be rotated by means of the pliers mouth 7. The front teeth 28 in a front region 51 facing the pliers tip 34 serve Area of the wave crest 31 of the work surface 23 and the wave trough 32 of the work surface 24 for the preferred exercise of a left rotation on a body, for example to loosen a screw connection (compare Figure 19), and that of the axis of rotation or the hinge pin axis x in a rear area 52 facing teeth 28 of the wave trough 32 of the working surface 23 and of the wave crest 31 of the working surface 24 to perform a clockwise rotation, for example to tighten a screw (see Figure 20).

A workpiece, for example in the form of a round bolt 49 shown in Figures 19 and 20, can be gripped in a front area 51 or a rear area 52 of the pliers mouth 7 by the teeth 28 of the work surfaces 23 and 24, with at least a double setting of the round bolt 49 is given, by at least one tooth 28' and 28" of each working surface 23 and 24. This double detection results at least with a shown diameter e of the round bolt 49, which diameter e an opening angle h of the pliers mouth of preferably about 10 degrees.The diameter e of the round bolt 48 can be selected to be smaller for detection in the front area 51 than for detection in the rear area 52, while maintaining the opening angle h of, for example, about 10 degrees. Preferably, the round bolt 49 is gripped in the front region 51 by a tooth 28'' of the first group G1 of the first working surface 24, which is inclined in the direction of the free end 48, and optionally two teeth 28, but in any case one tooth 28'. of the second group G6, the second working surface 23, with a possible contact with two teeth 28 of the second working surface 23, these belong to different groups G5 and G6, which follow one another in the longitudinal extension of the pliers mouth 7. Accordingly, in this area there is preferably a detection in the Area of a trough 32 of the polyline Z.

When the round bolt 49 is detected in the rear area 52 according to FIG tooth 28′ of the second group G2 of the first working surface 24 directed towards the axis of rotation x. If necessary, a further detection by a tooth 28′ in the area of the group G3 of the first working surface 24 can be provided.

The arrangement and design of the teeth 28 along the line Z or Z' allows the use of the pliers 1 with the proposed pliers mouth 7 over a comparatively large diameter range of the workpiece to be grasped, for example over a range of about 1 5 to 4 mm and more, further for example up to 16 or 20 mm or more.

Such a design of the pliers mouth 7 can also be given in a so-called combination pliers, for example to form the pliers mouth 7 in the manner of a burner hole, as shown in FIGS. 21 and 22. Viewed in the longitudinal extension L of the pliers 1, be provided with further in the direction of the axis of rotation x the pliers mouth 7 ahead of cutting 35, as further in the direction of the pliers tip 34 then to the pliers mouth 7, the working surfaces 23 and 24 Greifflä surfaces 36 can form.

As an alternative to the overall approximately rhombic arrangement of the lines Z and Z' of both working surfaces 23 and 24, the working surfaces 23 and 24 can have two opposite rows with groups of teeth 28, whose lines Z and Z' or one connecting the tooth tips 29 Enveloping surface over the entire extension of the respective toothing 16 in the above-described view in a straight line (compare Figure 23), if necessary with a parallel orientation to the penetration plane D. The linear lines Z, Z' of both working surfaces 23, 24 can also diverge extend to one another, for example including an acute angle of, for example, 10 degrees or 20 degrees to one another.

As a further alternative, there can also be a convex alignment of both lines Z and Z′ or the enveloping surfaces (see FIG. 24), viewed from the enforcement plane D outwards, as a further alternative again seen from the enforcement plane D outside a concave alignment of both polylines Z and Z' or the enveloping surfaces (compare Figure 25). A polyline Z or Z′ or an enveloping surface can also be concave and the other line Z′ or Z or the other enveloping surface can be convexly curved when viewed from the penetration plane D (compare FIG. 26).

A tooth 28 of the working surface 23 or 24, in particular its tooth tip 29, can with respect to the enforcement plane D a in the direction of extension of the assigned polyline Z or Z′ between two teeth 28 of the other working surface 24 or 23 resulting tooth trough 30 are essentially opposite. The tooth design, in particular the course of the tooth flanks 47 and 47', can be adjusted differently with respect to the working surfaces 23 and 24 according to the course of the lines Z and Z', in particular in the case that both lines Z and Z' are, for example, equally concave or equally convex (compare ligures 24 and 25).

Irrespective of the course of the lines Z and Z' or the enveloping surfaces, each working surface 23 and 24 is provided with teeth 16, with the pointed teeth 28 of a group of the second working surface 23 assigned to the front region 51 having an orientation in direction of the axis of rotation x and the teeth 28 of a further group of the same working surface 23 in the rear area 52 are aligned in the direction of the free end 48. The group of the first working surface 24 in the front area 51 which is remote from the axis preferably has teeth 28 which point in the direction of the run free end 48 inclined. A further group of the same working surface 24 assigned to the rear region 52 is, however, preferably provided with teeth 28 inclined in the direction of the axis of rotation x.

In addition, the working surfaces 23 and 24 can have indentations running in the direction of the tip 34 of the pliers, particularly in the case of pliers 1 according to the first exemplary embodiment, but also when the pliers 1 are designed in the manner of combination pliers according to the second exemplary embodiment, so that in particular when the pliers 1 are closed, an opening 37 on the side of the pliers tip remains in a front view of the pliers mouth 7 as shown in FIG. An opening 37 with a circumferential teeth 38 result. The pliers 1 designed in this way is accordingly also suitable for enclosing a body on the tip side in order to rotate it, for example.

The groups of teeth shown in FIGS. 23 to 26 with different orientations can also be supplemented by one or more further groups in the respective work surface. The other groups then join with regard to the orientation in such a way that they are in turn aligned in the opposite direction to the neighboring group.

The above explanations serve to explain the inventions covered by the application as a whole, which also independently develop the prior art at least through the following combinations of features, whereby two, several or all of these combinations of features can also be combined, namely:

A pair of pliers, which is characterized in that the teeth 16 can be overrun by pressing down the hinge pin 2 to adjust a jaw opening width w, the penetrating pliers limb 4 having an elongated overlapping area U, in which the penetrating pliers limb 4 of the interspersed pliers leg 3 is covered on both sides, with the overlapping area U running essentially at right angles to an adjustment direction r of the hinge pin 2 in the longitudinal slot 16, with a width g that corresponds to 0.5 times or more the maximum adjustment dimension f , and with a length d that corresponds to twice or more the maximum adjustment dimension f.

A pair of pliers, which is characterized in that in the course of the adjustment from a smaller to a larger jaw opening width w with respect to the grip-side pliers leg sections 21, 22, in any case, there is initially a larger surface area superimposed.

[00169] A pair of pliers, which is characterized in that a width h of the pliers 1 in the region of the superimposition, starting from a closed pliers 1, initially decreases when the pliers are adjusted to a larger jaw opening width (w).

A pliers characterized in that the fixed pliers arm 3 has a pit 39 formed for pressure actuation of the pivot pin 2, wherein a pivot pin axis x is disposed eccentrically to a geometric pit center axis y.

A pair of pliers, which is characterized in that the joint pin axis x is offset in the adjustment direction r of the pliers mouth 7 in relation to the center axis y of the pit.

A pair of pliers, which is characterized in that the jaws 5, 6 have working surfaces 23, 24 which are provided with teeth 25 and 26.

Pliers characterized in that the working surfaces 23, 24 deepen towards the tip 34 of the pliers with regard to a longitudinal extension L of the pliers mouth 7, so that when the pliers 1 are closed there is an opening in a front view of the pliers mouth 7 37 remains.

A pair of pliers, which is characterized in that both working surfaces 23, 24 each have teeth 29 in their course from the free end 48 of the jaws 5, 6 to the axis of rotation x, which indicate the alignment of the tooth have pointed 29 in the direction of the axis of rotation x, followed by further teeth NEN 28 in the same working surface 23, 24, which zen the alignment of Zahnspit 29 to the free end 48 of the jaws 5, 6 have, or vice versa, with further opposing groups Eq , G2, G3, G4, G5 and G6 of teeth 28 oppositely formed on the first and second working surfaces 23, 24, respectively.

Pliers, which are characterized in that viewed from the free end of the working surfaces 23, 24 of the pliers mouth 7 towards the axis of rotation x, a first working surface 24 of the pliers mouth 7 initially has a first group Gl of teeth 28 formed in which the respective bisecting line Q of the teeth 28, starting from the tooth tip 29 and facing away from the jaw 7 of the pliers, extends inclined to the free end of the jaw 6, followed by a second group G2 of teeth 28, in which the respective bisecting line de Q is towards the joint-side end of the pliers mouth 7 extends inclined, followed by a third group G3 of teeth 28, in which the respective angle bisecting Q in turn extends inclined to the free end of the jaw 6.

A pair of pliers, which is characterized in that viewed from the free end 50 of the working surfaces 23 and 24 of the pliers mouth 7 towards the axis of rotation x, a first group Gl of teeth 28 is initially formed on a first working surface 24 of the pliers mouth 7 where the acute angle d is given between the perpendicular N and the axis of rotation x, followed by a second group G2 of teeth 28, in which the acute angle e is between the perpendicular N and the free end 50 of the working surfaces 23 and 24 of the Pliers mouth 7 is given, followed by a third group G3 of teeth NEN 28, the acute angle d in turn are given between the perpendicular N and the axis of rotation x. A pair of pliers, which is characterized in that the third group G3 of teeth 28 is followed by a fourth group G4 of teeth 28, in which the respective bisecting line Q of the teeth 28 extends inclined towards the joint-side end of the pliers mouth 7.

Pliers characterized in that the third group G3 of teeth 28 is followed by a fourth group G4 of teeth 28 whose acute angle e is between the perpendicular N and the free end 50 of the working surfaces 23 and 24 of the pliers mouth 7 are given.

A pair of pliers characterized in that groups G1, G2, G3, G4, G5 and G6 of teeth 28 face each other with a specific angular orientation with respect to the plane of penetration D.

A pair of pliers characterized in that the tips of the teeth 29 are staggered relative to each other with respect to the perpendicular N through the median longitudinal plane E.

A pair of pliers, which is characterized in that a first group G5 of teeth 28 is provided on the second working surface 23 of the pliers mouth 7, in which the respective bisecting line Q of the teeth 28 extends from the tooth tip 29 and faces away extends inclined to the pliers mouth 7 to the free end of the jaw 5, followed by a second group G6 of teeth 28, in which the respective bisecting line Q extends inclined to the joint-side end of the pliers mouth 7, and that the second group G6 of teeth 28 two subgroups G6-1 and G6-2 of teeth 28, with a first subgroup G6-1 with a smaller inclination of the angle bisectors Q and a second subgroup G6-2 with a greater inclination of the angle bisectors Q. A pair of pliers, which is characterized in that a first group G5 of teeth 28 is provided on the second working surface 23 of the pliers mouth 7, in which the acute angle d is given between the vertical N and the axis of rotation x, and a second group G6 of teeth 28, in which the acute angle e is respectively given between the perpendicular N and the free end 50 of the working surfaces 23 and 24 of the pliers mouth 7, and that the second group G6 of teeth 28 has two subgroups G6-1 and G6-2 of teeth 28, with a first subset G6-1 having smaller acute angles e and a second subset G6-2 having larger acute angles e.

A pair of pliers which is characterized in that a round bolt 49 is located both in a front area 51 facing the free end 48 of the jaws 5, 6 and in a rear area 52 of the pliers mouth 7 by one or more opposing oppositely directed teeth 28 of the first or second working surface 23, 24 can be taken, with teeth 28 of different groups G1, G2, G3, G4, G5 and G6 of teeth in the front and rear areas 28 are in engagement with the round bolt 49, wherein the round bolt can also be detected in the rear area by two teeth 28 assigned to one of the opposite working surfaces 23, 24, whose tooth tips 29 run in opposite directions, and in the front area 51 also by two respectively one of the opposite working surfaces 23, 24 zugeord Neten teeth 28, the tooth tips 29 run in opposite directions, can be detected.

A pair of pliers which is characterized in that the round bolt 49 can be held twice if the round bolt 49 has a diameter e that is zens 49 in the front area 51 or in the rear area 52 requires a jaw opening of the pliers by about 10 degrees.

A pair of pliers, which is characterized in that the alignment of the tooth tips 29 is determined by a different length of tooth flanks 47, 47 'of the respective tooth 28, with an alignment in the direction of the axis of rotation x the longer tooth flank 47 on the Axis of rotation x is formed on the opposite side of the tooth tip 29 and when the tooth tip 29 is aligned with the free end 48 of the jaw jaws 5, 6, the longer tooth flank 47 is formed on the side of the tooth tip 29, which faces the free end 48 of the jaw jaw 5, 6 is turned away.

A pair of pliers, which is characterized in that each polyline Z, Z' has at least two adjoining sections T, which, pointing to the pliers mouth 7, enclose an angle a of 170 degrees or less up to, for example, 100 degrees to one another and that this Subsections T subsections T of the other polyline Z', Z are opposite, which, facing the jaws of the pliers 7, enclose an angle ß of 170 degrees or more up to, for example, 190 degrees to one another, and that in each polyline Z, Z' two subsections T are included which, viewed in the same direction, enclose an angle g of 190 degrees or more.

All features disclosed are (by themselves, but also in combination with one another) essential to the invention. The disclosure of the application also includes the content of the disclosure of the associated/attached priority documents (copy of the previous application) in full, also for the purpose of including features of these documents in the claims of the present application. The subclaims characterize with their features, even without the features of a referenced claim independent inventive developments of the prior art, in particular special to make divisional applications based on these claims. The invention specified in each claim can additionally have one or more of the features specified in the above description, in particular with reference numbers and/or specified in the list of reference numbers. The invention also relates to designs in which some of the features mentioned in the above description are not implemented, in particular if they are recognizable as unnecessary for the respective intended use or can be replaced by other technically equivalent means.

List of References

1 pliers 28' tooth

2 pivot pins 28" tooth

3 pliers handle 29 tooth tip

4 pliers handles 30 tooth valley

5 Jaw 31 Wave crest

6 Jaw 32 trough

7 pincer mouth 33 transition

8 handle section 34 tip of pliers

9 handle section 35 cutting edge

10 slot opening 36 gripping surface

11 Fork Section 37 Opening

12 mount 38 serration

13 longitudinal slot 39 pit

14 opening 40 crank area

15 yoke section 41 crank area

16 serration 42 pliers head

17 counter teeth 43 edge

18 leaf spring 44 edge edge

19 hinge pin floor 45 edge edge

20 operating projection 46 marginal edge

21 shank section 47 tooth flank

22 pliers leg section 47' tooth flank

23 work surface 48 free end

24 work surface 49 round bolts

25 serration 50 longitudinal centerline

26 teeth 51 front area

27 jaw opening 52 rear area

28 tooth a Offset dimension L Longitudinal extent b Distance M Mouth opening area d Length N Vertical e Diameter P Point f Adjustment dimension Q Bisector g Width S Extension h Width T Partial section k Width U Coverage area r Adjustment direction Z Polyline w Jaw opening width Z' Polyline x pivot pin axis y pit central axis a Angle ß angle

A dimension Y angle CI area d angle C2 area e angle

D enforcement plane h angle E longitudinal median plane Gl group G2 group G3 group G4 group G5 group G6 group G6-1 subgroup G6-2 subgroup

Claims

Expectations

1. Pliers (1) with two pliers legs (3, 4) crossing in a hinge pin (2) with a hinge pin axis (x), of which one (4) is to be regarded as movable and the other (3) as fixed, handle sections (8, 9) being formed on one side of the hinge pin (2) and jaw jaws (5, 6) which work together as a pliers mouth (7) being formed on the other side of the hinge pin (2), the movable pliers arm (4) has a longitudinal slot (13) with teeth (16) and the hinge pin (2) located in a receptacle (12) can be moved out of a toothed engagement and the movable pliers arm (4) passes through the fixed pliers arm (3), with further the longitudinal slot (13) has an extension (S) which, when the pliers (1) are closed, runs transversely to an alignment of the pliers legs (3, 4) on the handle side, characterized in that the toothing (16) is disengaged by pressing down the hinge pin ( 2) for adjustment a jaw opening width (w), the penetrating tongs limb (4) having an elongated overlapping area (U), in which the penetrating tongs limb (4) is covered on both sides by the penetrating tongs limb (3), the overlapping area ( U) elongated and running essentially at right angles to an adjustment direction (r) of the hinge pin (2) in the longitudinal slot (16), with a width (g) which corresponds to 0.5 times or more the maximum adjustment dimension (f). , and with a length (d) that corresponds to 2 times or more the maximum adjustment dimension (f).

2. Pliers according to claim 1, characterized in that in the course of the adjustment from a smaller to a larger jaw opening width (w) be plus the handle-side pliers shank sections (21, 22) initially results in a larger superimposition in terms of area.

3. Pliers according to one of the preceding claims, characterized in that a width (h) of the pliers (1) in the region of the superimposed position, starting from a closed pliers (1), initially decreases when adjusted to a larger jaw opening width (w).

4. Pliers according to one of the preceding claims, characterized in that the fixed pliers arm (3) has a pit (39) designed for pressure actuation of the joint bolt (2), with a joint bolt axis (x) being arranged eccentrically to a geometric pit central axis (y).

5. Pliers according to claim 4, characterized in that the joint bolt zenachse (x) in the adjustment direction (r) of the pliers mouth (7) to the pit central axis (y) is offset.

6. Pliers according to one of the preceding claims, characterized in that the jaws (5, 6) have working surfaces (23, 24) which are provided with teeth (25, 26).

7. Pliers according to claim 6, characterized in that the working surfaces (23, 24) deepen towards the tip of the pliers (34) with respect to a longitudinal extent (L) of the pliers mouth (7), so that when the pliers (1) are closed an opening (37) remains in a front view of the pliers mouth (7).

8. Pliers (1) with two pliers legs (3, 4) that can be pivoted about an axis of rotation (x) and a pliers mouth (7) formed from two jaws (5, 6), the pliers mouth (7) having opposite working surfaces (23 , 24), a first work surface (24) and a second work surface (23), on points, which are provided with teeth (25, 26) over a substantial part of their length, viewed from a free end (48) of the jaws (5, 6) towards the axis of rotation (x), with pointed teeth (28 ) have an alignment of the tooth tips (29) in the direction of the axis of rotation (x) and further pointed teeth (28) have an alignment of the tooth tips (29) to the free end (48) of the jaws (5, 6), or pliers (1 ) according to one of Claims 1 to 7, characterized in that both working surfaces (23, 24) each have teeth (29) in their course from the free end (48) of the jaws (5, 6) to the axis of rotation (x). point, which have the orientation of the tooth tips (29) in the direction of the axis of rotation (x), followed by further teeth (28) in the same working surface (23, 24), which have the orientation of the tooth tips (29) to the free end (48) of the Have jaws (5, 6), or vice versa, further each opposing groups (Gl, G2, G3, G4, G5 and G6) vo n teeth (28) are formed opposite one another on the first and second working surfaces (23, 24).

Pliers (1) with two pliers legs (3, 4) pivotable about an axis of rotation (x) and a pliers mouth (7), wherein the pliers mouth (7) has working surfaces (23, 24) which are provided with teeth (25, 26 ) are provided and the pointed teeth (28) are aligned in the direction of the axis of rotation (x) with regard to a course of tooth tips (29) in the working surface (23, 24), the teeth (28) also each having an angle bisector (Q), the bisectors extending to (Q) starting from the tooth tip (29) and facing away from the jaws of the pliers (7) to the free end of the jaws (5, 6) or to the end of the pliers mouth (7) on the articulated side , or pliers (1) according to one of claims 1 to 8, characterized in that viewed from the free end of the working surfaces (23, 24) of the pliers mouth (7) towards the axis of rotation (x) towards a first working surface (24) of the pliers mouth (7) first one first group (Gl) of teeth (28) is formed, in which the respec ge bisecting line (Q) of the teeth (28) starting from the tooth tip ze (29) and facing away from the pliers mouth (7) to the free end of the jaw ( 6) extends inclined, followed by a second group (G2) of teeth (28), in which the respective bisector (Q) to the ge articulated end of the pliers mouth (7) extends inclined, followed by a third group (G3) of teeth (28), in which the respective bisecting angle (Q) turn to the free end of the jaw (6) inclined he stretches.

10. Pliers (1) with two pliers legs (3, 4) pivotable about an axis of rotation (x) and a pliers mouth (7), wherein the pliers mouth (7) has working surfaces (23, 24) which are provided with teeth (25 , 26) are provided and the pointed teeth (28) have an alignment in the direction of the axis of rotation (x) with regard to a course of tooth tips (29) in the working surface (23, 24), wherein further in a view in which where the axis of rotation (x) is depicted as a point, a penetration level (D) extends through the pliers mouth (7), which is depicted as a line in the view, the penetration level (D) resulting from the fact that it is at a most closed setting of the pliers mouth (7) runs at right angles to a longitudinal center line (V) of a longitudinal slot (13) for receiving an adjustable hinge pin (2) or runs in such a way that the axis of rotation (x) extends within the enforcement plane (D), with either in the case of the longitudinal slot (13) e at the point of intersection (P2) of the enforcement plane (D) with the longitudinal center line (V) is selected, or with the axis of rotation (x) extending within the enforcement plane (D), the orientation of the enforcement plane (D) is selected such that in the course of a Closing the jaws of the pliers (7) at a certain opening angle, assigned to the free end (50) of the jaws (5, 6), at the same time for the first time, a touch from opposite lying work surfaces, in which case the tooth tips (29) in relation to a perpendicular (N) which passes through the tooth tips (29) to the enforcement plane (D), with different vertical distances (b) to the enforcement plane (D) end and furthermore the teeth (28) have an angle bisecting line (Q) which encloses an acute angle (d, e) with the penetration plane (D), with the acute angle (d, e) on a part of the teeth (28) in the area in which the bisecting line (Q) within an area of the pliers mouth (7) it stretches between the vertical (N) and the axis of rotation (x) and in a further part of the teeth (28) between the vertical (N) and the free end (50) of the pliers mouth (7) or pliers (1) according to one of Claims 1 to 9, characterized in that viewed from the free end (50) of the working surfaces (23 and 24) of the pliers mouth ( 7) towards the axis of rotation (x) at a first working surface (24) of the jaws of the pliers (7) first a first group (Gl) of teeth (28) is formed, in which the acute angle (d) is given in each case between the vertical (N) and the axis of rotation (x), followed by a second group (G2) of teeth ( 28), in which the acute angle (e) is given between the perpendicular right (N) and the free end (50) of the working surfaces (23 and 24) of the pliers mouth (7), followed by a third group (G3) of Teeth (28), the acute angle (d) in turn between the perpendicular th (N) and the axis of rotation (x) are given.

11. Pliers according to one of Claims 8 to 10, characterized in that the third group (G3) of teeth (28) is followed by a fourth group (G4) of teeth (28), in which the respective bisector de (Q ) of the teeth (28) to the joint-side end of the pliers mouth (7) extends ge tends.

12. Pliers according to one of claims 10 or 11, characterized in that the third group (G3) of teeth (28) a fourth Grup pe (G4) of teeth (28) connects, the acute angle (e) between the Vertical (N) and the free end (50) of the working surfaces (23 and 24) of the pliers mouth (7) are given.

13. Pliers according to one of claims 10 to 12, characterized in that respective groups (G1, G2, G3, G4, G5 and G6) of teeth (28) with egg ner specific angular orientation with respect to the enforcement level (D) are opposite.

14. Pliers according to one of claims 8 to 13, characterized in that the tooth tips (29) are arranged offset to one another with regard to the opposite position relative to the vertical (N) through the longitudinal center plane (E).

15. Pliers according to one of Claims 8 to 14, characterized in that a first group (G5) of teeth (28) is provided on the second working surface (23) of the pliers mouth (7), in which the respective bisecting angles ( Q) of the teeth (28) extending inclined starting from the tooth tip (29) and facing away from the pliers mouth (7) to the free end of the jaw (5), followed by a second group (G6) of teeth (28), in which the respective bisecting line (Q) extends inclined towards the articulated end of the pliers mouth (7), and that the second group (G6) of teeth (28) has two subgroups (G6-1 and G6-2) of teeth (28), with one first subgroup (G6-1) with a smaller inclination of the bisecting line (Q) and a second subgroup (G6-2) with a greater inclination of the bisecting line (Q), and/or, preferably, that the second working surface (23) of the pliers mouth (7) a first group pe (G5) of teeth (28) is provided, in which the acute angle (d) is given in each case between the perpendicular (N) and the axis of rotation (x), and a second group (G6) of teeth (28), at where the acute angle (e) is given between the vertical (N) and the free end (50) of the working surfaces (23 and 24) of the pliers mouth (7), and that the second group (G6) of teeth (28) has two subgroups (G6-1 and G6-2) of teeth (28), with a first subgroup (G6-1) with smaller acute angles (e) and a second subgroup (G6-2) with larger acute angles ( e).

16. Pliers according to one of Claims 8 to 15, characterized in that a round bolt (49) is located both in a front area (51) facing the free end (48) of the jaws (5, 6) and in a rear, the area (52) of the jaws of the pliers (7) facing the axis of rotation (x) can be gripped by one or more oppositely directed teeth (28) of the first or second working surface (23, 24), with the front and rear area each teeth (28) of different groups (Gl, G2, G3, G4, G5 and G6) of teeth (28) are in engagement with the round bolt (49), further the round bolt in the rear area of two each one of the opposite Teeth (28) assigned to working surfaces (23, 24), whose tooth tips (29) run in opposite directions, can be detected and in the front area (51) also by two teeth (28) assigned to one of the opposite working surfaces (23, 24), their tooth tips (29) in opposite directions nig run, is detectable.

17. Pliers according to one of claims 8 to 16, characterized in that the double version of the round bolt (49) is in any case possible if the round bolt (49) has a diameter (e) for mentioned detection of the round bolt (49) in the front area (51) or in the rear area (52) a pliers mouth opening by approx.

10 degrees required.

18. Pliers according to one of claims 8 to 17, characterized in that the alignment of the tooth tips (29) is specified by a different length of tooth flanks (47, 47 ') of the respective tooth (28), with an alignment in the direction of Axis of rotation (x) the longer tooth flank (47) is formed on the side of the tooth tip (29) facing away from the axis of rotation (x) and when the tooth tip (29) is aligned with the free end (48) of the jaws (5, 6) the longer tooth flank (47) on the

Side of the tooth tip (29) is formed, which faces away from the free end (48) of the jaws (5, 6).

19. Pliers (1) with two pliers legs (3, 4) pivotable about an axis of rotation (x) and a pliers mouth (7), wherein the pliers mouth (7) has working surfaces (23, 24) which are provided with teeth ( 25, 26) and the pointed teeth (28) are aligned in the direction of the axis of rotation (x), whereby a line (Z, Z') can be drawn through the tooth tips (29), with further partial sections (T ) of the line (Z, Z') enclose an angle (a, ß, g) with one another and in a pliers jaw open position lines (Z, Z') lie opposite one another, or pliers according to one of Claims 1 to 18, characterized in that each polyline (Z, Z') has at least two adjoining partial sections (T) which, pointing to the pliers mouth (7), enclose an angle (a) of 170 degrees or less up to, for example, 100 degrees to one another and that these subsections (T) subsections te (T) of the other polyline (Z ', Z) opposite ge to the Zan nmaul (7) turned an angle (ß) of 170 degrees or more up to enclose, for example, 190 degrees to one another, and that each line (Z, Z') contains two subsections (T) which, viewed in the same direction, enclose an angle (g) of 190 degrees or more.

20. Pliers, characterized by one or more of the characterizing features of one of the preceding claims.