EP3313619B1 - Pliers having two plier legs that intersect at a joint pin - Google Patents

Description

Field of engineering

The invention relates to a pair of pliers with two intersecting in a hinge pin pliers legs, of which one pliers leg is movable and the other pliers legs is fixed, and arranged with a between the fixed pliers leg and the hinge pin, a tooth engagement of the hinge pin supporting spring, the pliers legs on forming on one side of the hinge pin grip portions and on the other side a forceps jaw, wherein further the hinge pin through which at the same time an axis of rotation of the movable forceps leg is adjustable in a longitudinal slot of the stationary forceps leg, and where by means of in the direction of a plane defined by the forceps legs plane Dent gear engagement between the hinge pin and the longitudinal slot of the movable pliers legs relative to the fixed pliers leg is selectively fixed, moreover, the hinge pin in a only partially circular out formed opening having a different from the circular course entrainment molding, for cooperating with a driving Gegenausformung the hinge pin, wherein the hinge pin is rotatably guided in the circular portion of the opening and a circular line is predetermined by the circular portion of the opening ,

State of the art

Pliers of the type in question are known in many ways. For example, in this regard, the WO 2008/049850 A1 ( US 8 695 464 B2 ). To change the forceps jaw width, it is known that the meshing engagement between hinge pin and longitudinal slot willpowered to suspend thereafter to displace the movable leg by means of the hinge pin within the longitudinal slot relative to the fixed leg. From the cited WO application, it is known to lift the teeth engagement the hinge pin in a pliers leg, preferably the movable pliers legs to catch positive engagement for rotational drive, wherein the rotary driving begins only with partially open pliers mouth. The entrainment-shaping of the opening in the pliers limb causes with a radially beyond the usual contour of the hinge pin projecting driving Gegenausformungen together, with a usual movement of the movable pliers limb for closing or opening the pliers jaw remains without affecting the meshing engagement.

Next is the state of the art on the EP 2 596 912 A1 to refer.

Summary of the invention

In view of the above-described prior art, a technical problem of the invention is seen in a pliers of the type in question in terms of manufacturing technology favorable to further improve.

This object is achieved in the subject matter of claim 1, wherein given according to a first inventive idea in a pair of pliers, in which it is geared that the driving-shaping with respect to the circular line projects radially inward and the driving Gegenausformung is also formed within the circular line ,

The means of the hinge pin required to remove the toothing engagement and in the region of the opening of the one pliers limb extend within the through the leading, circular section resulting circle of the opening. More preferably, the entrainment Gegenausformung the hinge pin extends within a preferably circular contour of the same - viewed in a direction perpendicular to the pin axis extending plane. With the same hinge pin outside diameter, this offers the possibility of making the area surrounding the opening of the forceps limb slimmer in a material-saving manner, since the entrainment counter-shaping of the hinge pin does not engage in the material of the forceps limb outside the opening.

The proposed invention can be used for example in pliers with one another in the joint region pliers legs or pliers with a fork-shaped in the hinge region pliers legs, which fork portion is penetrated by the other pliers legs.

The opening in the pliers limb may be formed as a result of machining or lasing.

The rotational displacement of the hinge pin to cancel the toothing is preferred only intentionally feasible. For this purpose, the forceps jaw is opened by means of the movable pliers leg beyond the usual extent. The cancellation of the meshing intervention is achieved solely by appropriate pivoting or rotational displacement of the forceps arms relative to each other. There is no need for further manual intervention in the area of the hinge pin by the user.

It is further preferred that the entrainment molding and / or the entraining Gegenausformung run rounded with respect to their inner or outer contour line. Preferably, the contour lines run along a relation to the bolt axis or the opening axis Circle. Also, the contour line viewed from the pin axis to the outside radially only convexly curved and formed straight in sections. In a preferred embodiment, the curved regions of the entrainment shaping run along a common circular line, which relates to the opening axis, just as the convex regions of the entrainment counter-formation may preferably lie on a common circular line.

The, the entrainment formations forming wall portions of the opening may extend substantially chord-like to the otherwise given circular contour of the opening.

Distributed over the circumference can be formed several, in particular two driving formations. These can be arranged substantially diametrically opposite with respect to the opening axis, which at the same time also accommodates the pin axis when using the pliers. Here, one of the two driving-formations alone form a boundary of the opening, but also serve (alternatively) for sluggish rotational drive of the hinge pin in the teeth release. The further driving-shaping can offer in the opposite direction of rotation of the relevant forceps leg a stop limit for defining the forceps jaw closed position and / or a dragging of the hinge pin from the teeth release in the toothing receiving position.

In addition, the hinge pin can rotate freely in the opening preferably over an angular range of 10 to 45 °, more preferably approximately over an angular range of 15 to 30 °. The rotation limit of the hinge pin within the opening is given by the driving formations.

Also, the hinge pin can at least one side, with respect to the course of the rotation axis offset from engagement teeth, which are formed on the hinge pin, form a support portion. Such a support portion may provide an axial securing of the hinge pin at least in one direction.

Preferably, the mounting portion has a largest transverse to the axis viewed extent, which is selected to be greater than the largest distance dimension of the flanks of the longitudinal slot to each other.

The support portion may have, with reference to a floor plan in which the axis represents a point, for example, from a central pin portion outwardly, for example radially outwardly extending projections or the like, over which a corresponding Axialabstützung can be achieved. Preferred is an embodiment in which the mounting portion is formed as a cylinder portion, with a coincident with the axis of rotation cylinder axis.

In addition, the support portion may come to rest on an outer surface of the tong slot having the longitudinal slot. Such a configuration is particularly preferred in the case of pliers in which the forceps arms lie directly on one another in the joint region, and the movable forceps limb preferably does not have a fork-shaped joint region. In such an arrangement, the support portion becomes moved according to a forceps jaw width adjustment according to corresponding displacement of the bolt in the longitudinal slot along the facing surface of the longitudinal slot having forceps leg.

Also, the support portion may be received in a recess of the movable pliers limb. Such a recess is preferably formed so that a rotation of the support portion according to corresponding rotational displacement of the bolt can be achieved. Thus, in a preferred embodiment of the mounting portion as a cylindrical portion, the recess receiving the mounting portion is preferably circular in plan view and overall preferably pot-shaped.

Also, the recess may be formed in the form of a relevant piercing leg completely passing hole.

In addition, the support portion may be received in a recess of the longitudinal slot having pliers limb. The recess is in this case preferably aligned with respect to a floor plan the course of the longitudinal slot, wherein further the recess in the thickness direction, i. in Achserstreckungsrichtung of the bolt, extending only over a part thickness of the pliers limb in the joint region and over the further part of the thickness in the region of an edge of the longitudinal slot which cooperates with the engagement teeth of the bolt counter-toothing is formed.

Brief description of the drawings

Fig. 1

in einer ersten Ausführungsform eine Zange der in Rede stehenden Art in Vorderansicht, eine Zangenmaul-Schließstellung betreffend;

Fig. 2

die Rückansicht hierzu;

Fig. 3

einen Querschnitt durch die Zange, geschnitten in der Ebene eines Festschenkels, begrenzt auf den Bereich eines Längsschlitzes im Festschenkel, die Zangenmaul-Schließstellung betreffend;

Fig. 4

die Herausvergrößerung des Bereiches IV in Figur 3;

Fig. 5

den vergrößerten Bereich V in Figur 2 nach Abnahme einer Abdeckkappe eines Gelenkbolzens;

Fig. 6

eine partiell geschnittene Ansichtdarstellung der Zange in der Zangenmaul-Öffnungsstellung;

Fig. 7

die Herausvergrößerung des Bereiches VII in Figur 6;

Fig. 8

eine der Figur 5 entsprechende Darstellung, die Zangenstellung gemäß Figur 6 betreffend;

Fig. 9

eine der Figur 3 entsprechende partiell geschnittene Darstellung der Zange, betreffend eine Verzahnungs-Aufhebestellung zur Schiebeverlagerung eines Zangenschenkels;

Fig. 10

die Herausvergrößerung des Bereiches X in Figur 9;

Fig. 11

eine der Figur 5 entsprechende Darstellung, die Zangenstellung gemäß Figur 9 betreffend;

Fig. 12

den Schnitt gemäß der Linie XII-XII in Figur 10;

Fig. 13

die Zangenschenkel der Zange sowie der Gelenkbolzen und die Abdeckkappe des Gelenkbolzens in perspektivischer Explosionsdarstellung;

Fig. 14

den Gelenkbolzen in einer perspektivischen Einzeldarstellung;

Fig. 15

in einer zweiten Ausführungsform eine Zange in Vorderansicht, eine Zangenmaul-Schließstellung betreffend;

Fig. 16

die Rückansicht hierzu;

Fig. 17

die Zange in einer Stellung gemäß Figur 16 in einer partiell geschnittenen Darstellung;

Fig. 18

den vergrößerten Bereich XVIII in Figur 17;

Fig. 19

eine explosionsperspektivische Darstellung der Zange gemäß Figur 15;

Fig. 20

den Schnitt gemäß der Linie XX-XX in Figur 16;

Fig. 21

eine Schnittdarstellung gemäß Figur 20, eine weitere Ausführungsform der Gelenkbolzenausbildung betreffend;

Fig. 22

eine perspektivische Darstellung einer Zange gemäß Figur 15 mit einer Bolzenausgestaltung gemäß Figur 21;

Fig. 23

eine der Figur 21 entsprechende Darstellung, eine weitere Ausführungsform betreffend;

Fig. 24

in einer weiteren Ausführungsform einen Schnitt gemäß Figur 21;

Fig. 25

eine weitere der Figur 21 entsprechende Darstellung, eine weitere Ausführungsform betreffend.

The invention is explained below with reference to the accompanying drawing, which illustrates only several embodiments. A part that is explained only with reference to one of the embodiments and at a another exemplary embodiment is not replaced by another part due to the special feature found there, it is therefore also described as part of this possible further embodiment as an existing part. On the drawing shows:

Fig. 1

in a first embodiment, a pair of pliers of the type in question in front view, a pliers mouth closed position concerning;

Fig. 2

the rear view for this;

Fig. 3

a cross-section through the pliers, cut in the plane of a peg, limited to the area of a longitudinal slot in the leg, pincer jaw closing position concerning;

Fig. 4

the enlargement of the area IV in FIG. 3 ;

Fig. 5

the enlarged area V in FIG. 2 after removing a cap of a hinge pin;

Fig. 6

a partially sectioned view of the pliers in the forceps jaw opening position;

Fig. 7

the enlargement of the area VII in FIG. 6 ;

Fig. 8

one of the FIG. 5 corresponding representation, the pliers position according to FIG. 6 concerning;

Fig. 9

one of the FIG. 3 corresponding partially cut representation of the pliers, concerning a tooth raising position for sliding displacement of a pliers limb;

Fig. 10

the zoom out of the area X in FIG. 9 ;

Fig. 11

one of the FIG. 5 corresponding representation, the pliers position according to FIG. 9 concerning;

Fig. 12

the section according to the line XII-XII in FIG. 10 ;

Fig. 13

the pliers legs of the pliers and the hinge pin and the cap of the hinge pin in a perspective exploded view;

Fig. 14

the hinge pin in a perspective detail view;

Fig. 15

in a second embodiment, a forceps in front view, a forceps jaw closure position concerning;

Fig. 16

the rear view for this;

Fig. 17

the pliers in a position according to FIG. 16 in a partially sectioned representation;

Fig. 18

the enlarged area XVIII in FIG. 17 ;

Fig. 19

an exploded perspective view of the pliers according to FIG. 15 ;

Fig. 20

the section according to the line XX-XX in FIG. 16 ;

Fig. 21

a sectional view according to FIG. 20 another embodiment of the hinge pin education concerning;

Fig. 22

a perspective view of a pair of pliers according to FIG. 15 with a bolt design according to FIG. 21 ;

Fig. 23

one of the FIG. 21 corresponding representation concerning a further embodiment;

Fig. 24

in a further embodiment according to a section FIG. 21 ;

Fig. 25

another one FIG. 21 corresponding representation concerning a further embodiment.

Description of the embodiments

Shown and described, first with reference to the Figures 1 and 2 , A first embodiment of a pliers 1 in the form of a water pump pliers. This has two pliers legs 2 and 3, which intersect in a hinge pin 4.

The pliers leg 2 is referred to as a fixed pliers leg. The pliers leg 3 is rotatable about the given by the hinge pin 4 axis of rotation x relative to the pliers leg 2 to change the width of the pliers mouth M.

Starting from the pliers legs 2 and 3 pivotally holding each hinge pin 4 form the pliers legs 2 and 3 on the one hand grip sections 5 and 6 and on the other side of the hinge pin 4 jaws 7 and 8th

The fixed pliers limb 2 has a longitudinal slot 9 in the crossing region of the pliers limbs 2 and 3. This passes through the hinge pin 4, the bolt axis, which also results in the axis of rotation x, extends transversely to the plane defined by the peripheral edge contour of the longitudinal slot 9 plane.

The movable pliers leg 3 is fork-shaped in the crossing region of the pliers legs 2 and 3, with parallel and spaced-apart fork sections 10 and 11. These flank the, the longitudinal slot 9 having leg portion of the stationary pliers limb 2. The fixed pliers leg 11 is through the fork portion of the movable Pliers leg 3 plugged.

The hinge pin 4 is rotatably supported in the fork sections 10 and 11 of the movable pliers limb 3. Thus, the fork portions 10 and 11 corresponding, the associated end portions of the hinge pin 4 receiving openings 12 and 13.

The hinge pin 4 has in the, the longitudinal slot 9 in the forceps leg 2 penetrating region, in particular in the respective cross-sectional plane perpendicular to the axis of rotation x an elongated formation 32, projecting beyond the outwardly facing and aligned in the axial direction engaging teeth 14. These interact with on a associated edge 15 of the longitudinal slot 9 arranged counter teeth 16 together, for sliding determination of the movable pliers limb 3 relative to the pliers leg second

Transverse to the formation 32, a bore 17 is provided substantially opposite to the engagement teeth 14. In this sits a spring 18, which acts on a preferably captive in the bore 17 and over the bore opening plane and thus over the bore opening having surface of the recess 32 protruding ball 19 against the provided with the mating teeth 16 edge 15 opposite edge 20 acts to support the meshing engagement between the engagement teeth 14 of the hinge pin 4 and the mating teeth 16 in the region of the longitudinal slot. 9

The spring 18 is preferably a cylinder compression spring.

In the engaged position of the toothing between the hinge pin-side engaging teeth 14 and the longitudinal slot-side counter teeth 16 as shown in the FIGS. 1 to 8 is a pivotal displacement of the forceps leg relative to the forceps leg 2 about the axis of rotation x of the hinge pin 4 is possible, so as to the jaws 7 and 8 in a in the FIGS. 1 to 5 to shift shown pliers mouth closed position or out of this into a forceps jaw open position according to the representations in the FIGS. 6 to 8 ,

According to volitional influence on the teeth this can be canceled, according to change the forceps jaw distance according to displacement of the movable pliers leg 3 with the hinge pin 4 in the longitudinal slot. 9

The hinge pin 4 may have as a holding portion 34 a circular-cylindrical portion 21 having a viewed in the direction of extension of the axis of rotation x thickness, which corresponds to the viewed in the same direction material thickness of the fork portion 10 substantially. With the cylinder portion 21 of the hinge pin 4 is rotatably guided in a recess in the form of a diameter-adapted opening 12 in the fork portion 10 about the rotation axis x.

The bolt section which extends through the longitudinal slot 9 and engages in the opening 13 of the other fork section 11 has, in a plan view, in which plan view the rotation axis x is punctiform, essentially diametrically opposite circular sections 22. The respective radius of each circular section 22 relating to the axis of rotation x corresponds to that of the cylindrical section 21 so that the circular sections 22, viewed in the direction of extension of the axis of rotation x, preferably run continuously into the circumferential wall of the circular section 22. There may be an edge in the inlet area.

The circular sections 22 are connected to each other in plan view via straight contour lines, which straight contour lines in a projection along the axis of rotation x on the cylinder section 21 cut this secant-like.

This results in the direction of extension of the axis of rotation x adjacent to the cylinder portion 21 on both sides of the axis of rotation x plane surfaces 23 and 24 whose straight in plan outline extending lines an angle α of about 15 to 30 °, for example, about 20 ° to each other.

On the surface 23, the engaging teeth 14 are formed on the longitudinal slot 9 passing through area. These occur freely over the surface 23.

Overall, the hinge pin 4 is preferably formed only within a the diameter of the support portion or the cylinder portion 21 and / or the circular portion 22 receiving imaginary circular cylinder.

The cylinder section 21 facing away from the end face 33 of the hinge pin 4 may be aligned with the forceps leg 2 facing away from the surface of the opening 13 having fork portion 11.

This pin surface is preferably provided with a central, the axis of rotation x receiving bore 25, in which a pin 26 of a cap 27 is seated. The cap 27 may have a relation to the bolt diameter enlarged diameter, for support on the, the opening 13 in the fork portion 11 surrounding edge region.

The cap 27 may be connected via the pin 26 fixed to the hinge pin 4, for example, according to a screw connection between pin 26 and bore 25 or also due to a press fit. Also in this regard, a bond or flanging can be provided. In addition, a riveting may be provided. Also, if necessary, omitting the cap 27, the hinge pin 4 against axial displacement and thus be prevented from falling out, such as by placing a force acting on the support portion (cylinder portion 21) in the insertion direction spring or a corresponding spring-loaded part.

In the Figures 5 . 8th and 11 is to illustrate the function, the cap 27 is not shown.

The opening 13 in the fork portion 11 is not formed as the opening 12 in the fork portion 10 is circular throughout. Rather, approximately diametrically opposite circular sections 28 are provided with respect to a plan view of the opening 13, which lie on a common circular line K with the axis of rotation x as the center. The circular line K preferably has the same diameter as the opening 12 in the fork section 10.

The circular sections 28 are connected over the circular line K chord-like intersecting, in the course of their extension between the circular sections 28 radially inwardly toward the axis of rotation x curved contour lines connected to the formation of driving formations 29 and 30th

Between the driving formations 29 and 30, the associated end portion of the hinge pin 4 engages. The surfaces 23 and 24 of the hinge pin 4 extend between the driving formations 29 and 30. The extending between the driving formations 29 and 30 radial portion of the hinge pin 4 forms a driving Gegenausformung 31st

The formation of the driving Gegenausformung 31 and the given in the circumferential direction of the opening 13 spacing of the driving formations 29 and 30 allows a relative pivotal displacement of the pliers leg 3 to the pliers leg 2. Here, the hinge pin 4 is fixed in conventional pliers use, so that the pliers legs 3 in Course of the pivoting movement in the forceps jaw closed position a stop limit learns by the driving formation 29 against the driving Gegenausformung 31 of the hinge pin 4 occurs.

During a pivotal displacement of the forceps leg 3 out of the forceps jaw closed position in the direction of a forceps jaw opening position, the forceps limb 3 initially rotates relative to the toothed pin located in toothed engagement 4. When the jaw opening position is reached, the entrainment formation 30 comes into contact with the entrainment Counter-forming 31.

The movable pliers leg 3 is in this case over an angle β of about 30 ° relative to the hinge pin 4 and the stationary pliers leg 2 freely rotatable, or the hinge pin 4 freely rotatable about this angular range in the opening 13 of the pliers leg. 3

From the into the FIGS. 6 to 8 Pliers jaw opening position shown can be brought out of engagement by further pivoting of the forceps leg 3 on the forceps jaw opening position (arrow a) between the hinge pin 4 and longitudinal slot 9 (see FIGS. 9 to 12 This disengagement rotary displacement is stop limited by conditioning the opposite surface of the toothing 32 on the facing edge 20 of the longitudinal slot 9.

In the course of this further pivotal displacement, the hinge pin 4 is entrained about the axis of rotation x via the driving formation 30 under contact with the driving counter-counter-shaping 31, which counteracts the rotation Effect of the spring 18 under immersion of the ball 19 in the bore 17, a pivoting of the engagement teeth 14 from the engaged position to the mating teeth 16 of the longitudinal slot 9 leads. The movable pliers leg 3 is displaceable in this pivotal position along the longitudinal slot 9 to change the forceps jaw width.

The pivot stop limit and / or the swiveling take-up for canceling the toothing engagement may alternatively (possibly additionally) be achieved over the region of the hinge pin 4 substantially diametrically opposed to the region designated as entrainment counter-shaping 31 in cooperation with this associated carrier formations of the opening 13.

Also, the entrainment Gegenausformung 31 and / or the formation of this opposite region, for example, web-like or protrusion-like to be formed to a central pin portion.

With rearward displacement of the movable pliers limb 3 and associated Drehrückverlagerung of the hinge pin 4, the engagement position of the toothing between hinge pin 4 and longitudinal slot 9 is restored.

The rotational displacement of the forceps leg 3 beyond the forceps jaw opening position to cancel the teeth engagement can be done over an angle γ of about 15 °.

The cancellation of the meshing engagement can be brought out of any detent position along the longitudinal slot 9 out.

Both the openings 12 and 13 in the region of the fork sections 10 and 11 and the hinge pin 4 as a whole (with the exception of the separate cap 27) extend with respect to a plan within the through the opening 12 and through the circular portions 28 of the opening 13 given circle line K.

The FIGS. 15 to 20 show a second embodiment of a pair of pliers 1 with two immediately adjacent pliers legs 2 and 3 in the joint area.

The fixed pliers leg 2 is also provided here with a longitudinal slot 9 along the flank 15, the counter toothing 16 is formed.

The movable pliers leg 3 is provided with an opening 13 according to the above-described embodiment, corresponding to trained driving formations 29 and 30th

The hinge pin 4 is formed in accordance with the above-described embodiment and, viewed axially, also has a holding section 34 in the form of a cylindrical section 21. With this comes the hinge pin 4 on the facing and the longitudinal slot 9 surrounding outer surface of the fixed pliers limb 2 to the plant, so experiences an axial support.

The region of the formation 32 with the spring-supported ball 19 passes through the longitudinal slot area. The engagement teeth 14 formed on the formation 32 are aligned with the counter teeth 16 of the forceps leg 2 for tooth engagement.

In the region of the end of the hinge pin 4 facing away from the mounting portion 34, this too is provided with a driving countermold 31 according to the previously described embodiment, for cooperation with the driving formations 29 and 30 in the region of the opening 13 of the movable pliers arm 3.

An axial securing of the hinge pin 4 against falling out is also provided here by the arrangement of a cap 27, which preferably completely covers the opening 13 of the movable pliers limb 3.

The mode of operation for the usual use of the forceps 1 as well as for adjusting the forceps jaw width is the same as described above, wherein a guidance of the movable forceps limb 3 in the pivoting direction is given in particular by cooperation of the circular-segment-shaped outer surfaces of the circular sections 22 with the facing circular sections 28 of the opening 13.

The FIGS. 21 and 22 show an alternative embodiment with respect to the attachment of the cap 27 on the hinge pin. 4

The hinge pin 4 is provided with a in use position on the end face 33 of the hinge pin 4 protruding, axially arranged pin 35 which passes through a central bore 36 of the cap 27. The bore 36 widens toward the open end preferably funnel-like, to allow the formation of a radially enlarged rivet head of the pin 35th

Although in the FIGS. 21 and 22 the possible determination of the cap 27 by means of a pair of pliers according to the embodiment in FIG. 15 is shown, this possibility of fixing the cap 27, as well as the comments below, even with a pair of pliers according to the first embodiment possible.

FIG. 23 shows an embodiment based on the version as shown in FIG FIG. 21 , Again, the cap 27 is riveted to the hinge pin 4. The support portion 34 formed as a cylinder portion 21, which rests on the facing surface of the pliers arm 2 in the embodiment described above, is stepped in this embodiment with respect to a longitudinal section through the hinge pin 4. Thus, a radially extended collar of the support portion 34 can be supported on the facing surface of the forceps leg 2 or come to rest on this. In contrast, a diameter-reduced central cylinder portion 21 dives into a recess 37 of the longitudinal slot 9 having pliers legs 2 a. This recess 37 extends viewed in the axial direction over about half the thickness of the respective forceps leg 2. Beyond the further thickness dimension of the longitudinal slot 9 along the flank 15 is formed with the mating teeth 16. The recess 37 extends with respect to a plan view of the longitudinal slot 9 according to the slot profile.

The hinge pin 4 is guided over the cylinder portion 21 on the flanks of the recess 37.

The bolt-side holding portion 34 is adapted with respect to its axial extent dimension to the corresponding Axialerstreckungsmaß the longitudinal slot. 9

Also, as shown in FIG FIG. 24 the cap 27 may be screwed to the hinge pin 4. For this purpose, the hinge pin 4 a running in alignment with the axis of rotation x threaded bore 38, in which a, a central bore 36 of the cap 27 passing through screw 39 engages.

Also, according to FIG. 25 the hinge pin 4 end opposite to the support portion 34 to be provided with a male thread having a pin portion 40 which protrudes beyond the bracket portion 34 facing away from the surface of the pliers 1 in the joint area. On this pin portion 40, a nut 41 is screwed, which can come to rest on the facing outer surface of the pliers limb.

Cover cap 27 and nut 41 provide together with the opposite support portion 34 an axial securing of the hinge pin 4th <b><u> List of Reference Numbers </ u></b> 1 tongs 27 cap 2 pliers legs 28 circular sections 3 pliers legs 29 Entrainment formation 4 hinge pins 30 Entrainment formation 5 handle portion 31 Entrainment Gegenausformung 6 handle portion 32 formation 7 jaw 33 face 8th jaw 34 support portion 9 longitudinal slot 35 spigot 10 fork portion 36 drilling 11 fork portion 37 recess 12 opening 38 threaded hole 13 opening 39 screw 14 engaging tooth 40 journal section 15 flank 41 mother 16 against tooth a arrow 17 drilling x axis of rotation 18 feather 19 Bullet K circle line 20 flank M beaks 21 cylinder section 22 circular section α corner 23 surface β corner 24 surface γ corner 25 drilling 26 pen

Claims (9)

1. Pliers (1) comprising two pliers legs (2, 3) which intersect at a hinge pin (4), of which one pliers leg (3) is movable and the other pliers leg (2) is stationary, and comprising a spring (18) which is arranged between the stationary pliers leg (2) and the hinge pin (4) and assists with toothed engagement of the hinge pin (4), the pliers legs (2, 3) forming grip portions (5, 6) on one side of the hinge pin (4) and a pliers mouth (M) on the other side, the hinge pin (4), through which an axis of rotation (x) of the movable pliers leg (3) extends at the same time, also being adjustable in a longitudinal slot (9) of the stationary pliers leg (2), and the movable pliers leg (3) being selectively fixable relative to the stationary pliers leg (2) by means of a toothed engagement between the hinge pin (4) and the longitudinal slot (9), which engagement takes place in the direction of a plane which is spanned by the pliers legs (2, 3), the hinge pin (4) additionally being received in an opening (13) which is only partially circular and has a driving form (29, 30) which deviates from the circular shape, for cooperation with a counter driving form (31) of the hinge pin (4), the hinge pin (4) being rotatably guided in the circular portion (28) of the opening (13), and a circular line (K) being predetermined by the circular portion (28) of the opening (13), characterised in that the driving form (29, 30) projects radially inwards with respect to the circular line (K), and the counter driving form (31) is also formed within the circular line (K).
2. Pliers according to claim 1, characterised in that the driving form (29, 30) and/or the counter driving form (31) extend so as to be rounded in terms of the inner or outer contour line thereof.
3. Pliers according to either of the preceding claims, characterised in that two driving forms (29, 30) are formed that are distributed over the circumference.
4. Pliers according to any of the preceding claims, characterised in that the hinge pin (4) can rotate freely in the opening (13) over an angular range of 10 to 45°.
5. Pliers according to any of the preceding claims, characterised in that the hinge pin (4) forms a holding portion (34) on at least one side, which portion, with respect to the course of the axis of rotation (x), is offset from engagement teeth (14) which are formed on the hinge pin (4).
6. Pliers according to claim 5, characterised in that the holding portion (34) is designed as a cylinder portion (21).
7. Pliers according to either claim 5 or claim 6, characterised in that the holding portion (34) can rest against an outer surface of the pliers leg (2) which has the longitudinal slot (9).
8. Pliers according to any of claims 5 to 7, characterised in that the holding portion (34) is received in a recess of the movable pliers leg (3).
9. Pliers according to any of claims 5 to 7, characterised in that the holding portion (34) is received in a recess (37) of the pliers leg (2) which has the longitudinal slot (9).

Images