EP2054195B1 - Pliers with joint pin that can be moved against the force of a spring - Google Patents

Description

The invention relates first to a pair of pliers with two intersecting in a hinge pin pliers legs, one of which is movable and the other is stationary and with a between the leg and the hinge pin, a tooth engagement of the hinge pin supportive acting spring, the pliers legs on one side of the Form hinge pin handle portions and on the other side of the hinge pin a forceps jaw is formed, 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 wherein moreover by means of in the direction of a clamped by the forceps legs Level successive interlocking engagement between the hinge pin and the longitudinal slot of the movable pliers legs relative to the fixed pliers leg is selectively fixable.

Pliers with two adjoining in a hinge pin pliers legs, in which the opening width of the pliers mouth is changed by an adjustment of the hinge pin in a longitudinal slot, have already become known in a variety of configurations. First, for example, on the GB 10112 to refer. Continue on the EP 528 252 A1 , In these known pliers of the meshing engagement is carried out for a stepwise adjustability by a movement of the hinge pin perpendicular to a plane spanned by the pliers legs level. The hinge pin of these known pliers is also supported in the meshing engagement by a spring, namely biased at said pliers in the meshing engagement. The spring is supported for this purpose on the movable pliers legs.

Next is the state of the art on the WO 2004/103646 A2 to refer. In this pliers, an automatic delivery of Zangemauls takes place when gripping an object to be operated with the pliers. The hinge pin comes in the direction of a plane spanned by the forceps leg level in toothing engagement with corresponding teeth of a flank of the longitudinal slot. However, the effect of the spring is such, at least tending, that the gear engagement is thereby canceled. Further, since the spring loads the movable pliers leg constantly in the opening direction of the pliers mouth, the pliers mouth in the starting position is always in the largest possible open position.

Off is the state of the art on the DE 299 07 864 U1 , the EP 1 245 338 A and the US 4,048,878 A to refer.

Also becomes the state of the art on the DE 958 459 referenced pincers with adjustable jaw width. The hinge pin is held in a slide displaceable in the longitudinal slot of the peg, slide over which slide the meshing engagement between hinge pin and the longitudinal slot is reached. This intervention is supported by a spring acting on the carriage against the slot-toothing.

Based on the last-mentioned prior art, the invention has the object to design the known pliers and further develop that results in an advantageous different handling characteristics.

This object is achieved in the subject matter of claim 1, wherein it is based on the fact that the hinge pin is released from the teeth at single tensile load of the movable forceps leg transversely to the longitudinal extent of the longitudinal slot. This results in a significantly different handling. A once set mouth opening width is maintained even after appropriate use until it is deliberately adjusted. Nevertheless, the mouth opening width is adjustable without any manipulation on the hinge pin itself is required. By merely pulling movement of the movable pliers limb in the plane spanned by the pliers limb, an adjustment of the mouth width can be carried out without manual actuation of the hinge pin itself. It does not necessarily require the swinging of the movable leg to over here the gear engagement. Accordingly, such a repeal is possible even when handling in tight areas that do not allow pivoting of the long legs to each other. The tensile load of the movable pliers leg transversely to the longitudinal extent of the longitudinal slot does not necessarily have to be directed at right angles to the longitudinal slot with respect to a plane extending transversely to the bolt axis. Rather, in this regard, the term "transverse" includes an angular range of a few degrees up to, for example, 10 °, 20 ° or more at the right angle. If you pull in this angle range on the movable leg, the hinge pin is released from the teeth.

The invention further relates to a pair of pliers according to the features of claim 2. The hinge pin is initially movable out of the meshing engagement by a displacement transversely to the axis of rotation of the movable pliers limb out. However, more preferably this is not the only possible movement to solve the meshing intervention. Rather, with regard to an actually performed forceps in this context is preferred that the hinge pin - also - from the teeth by a shift in the direction of the axis of rotation of the movable Pliers leg is moved out. As far as the operation is concerned, as stated in the above EP 528 252 A1 is known. The user thus has the opportunity to use one or the other Verstellart side by side or depending on the application.

In a further development of the subject invention, it is provided that the (further in WO 2008/049850 A1 , Page 4, line 7)

Movement of the hinge pin is accompanied by a rotation about the axis of rotation. The displacement of the hinge pin in particular transversely to the axis of rotation is correspondingly superimposed by a rotation of the same, in the course of which rotational displacement of the hinge pin of the tooth engagement between the hinge pin and the longitudinal slot of the movable pliers limb is canceled. The teeth of the hinge pin take hereafter a spaced position to the teeth of the longitudinal slot, after which an adjustment of the pliers legs to each other in particular in the sense of a Maulweitenvergrößerung can be achieved. This results in a further favorable adjustment for the user. The movement and rotation of the hinge pin in the gear engagement or out of this preferably takes place solely by relative displacement of the pliers legs to each other. The rotation of the hinge pin about the axis of rotation can be done only by train on the hinge pin carrying the movable pliers legs transversely to the longitudinal extent of the longitudinal slot, for example, under the support of a hinge pin portion on an edge of the longitudinal slot. Further, the rotation of the hinge pin can also be brought about by constructive measures in the cooperation area with the hinge pin. In this regard, it is proposed, for example, that the rotation is achieved by an off-center loading of the hinge pin with respect to the longitudinal slot. By this action, a positive control is achieved in the direction of rotation of the hinge pin. The application of the hinge pin takes place off-center of the longitudinal slot, ie preferably laterally offset to a longitudinal slot centerline, which at the same time the rotational longitudinal axis receives the hinge pin, whereby the direction of rotation is predetermined with appropriate action.

In addition, it is proposed in this regard that the off-center admission is achieved according to a system of the hinge pin at one end portion of the longitudinal slot, so on at one of the longitudinal edge flanks of the longitudinal slot connecting slot bottom. In cooperation with this end portion is brought by appropriate action on the hinge pin by rotation about the longitudinal axis of the gear engagement, preferably this, the rotation of the hinge pin inducing impingement is provided only in the region of a longitudinal slot end, more preferably in the region of minimum mouth opening. Alternatively or in combination, a corresponding action on the hinge pin can also take place in the opposite end region of the longitudinal slot. The loading of the hinge pin by the longitudinal slot end portion leads under appropriate force on the forceps arms to a forced control of the hinge pin to cancel the meshing engagement.

It is further preferred in this regard that the hinge pin and / or the end portion of the longitudinal slot has a loading projection. If this is formed on the hinge pin, a one-piece design is preferred in this regard, this further in the manner of a with respect to the hinge pin axis approximately radially aligned control projection, which cooperates with the facing base edge of the longitudinal slot. Alternatively, just this base edge of the longitudinal slot may be provided with the Beaufschlagungsvorsprung which eccentrically with respect to the longitudinal center axis of the longitudinal slot arranged on the hinge pin acts such that it turns out of the meshing engagement. As an alternative, both the base flank of the longitudinal slot and the hinge pin can have off-center projections arranged correspondingly for cooperation. is the actuating projection formed solely on the hinge pin, so the base edge of the longitudinal slot acts in the manner of a control edge.

In a further embodiment, the hinge pin can also be trapped in a form-fitting manner in a pliers limb for rotational drive, whereby the rotational drive only starts with the pliers mouth open partially. Accordingly, the rotary drive is positively controlled via a pivoting of the pliers legs to each other about the pin axis. In this regard, it is preferred that the hinge pin is positively caught in the movable pliers leg. The forced Dreheitschleppen the hinge pin to cancel the meshing engagement is further preferably only at the usual forceps jaw opening width for removing the forceps from the part to be gripped bordering forceps jaw opening. Accordingly, the rotational displacement of the hinge pin to cancel the teeth is intentionally carried out by the forceps jaw is opened beyond the usual dimensions, such as a forceps jaw opening angle of more than 20 °, further including 25 ° or 30 °, for example. This positive rotational driving the hinge pin is feasible in a preferred embodiment in each toothed position along the longitudinal slot, whereby the user in each forceps jaw position by means of simple rotary displacement of the forceps arms to each other a different forceps jaw width can be adjusted, which proves particularly in hard to reach areas of advantage, beyond in areas that comply with VDE regulations. The user does not need to grasp the hinge pin for forceps jaw adjustment. Rather, the hands remain on the preferably suitably insulated pliers legs.

The form-fitting connection for rotational driving of the hinge pin via a pliers limb is achieved in a preferred embodiment in that the hinge pin has a radially extending driving projection, which in a radially inner Mitnahmeausnehmung of, which receives the hinge pin Hole having pliers leg engages. The Mitnahmeausnehmung hereby offers the engaging driving projection a freewheel in the range of conventional forceps handling, so that in a conventional opening and closing of the forceps jaw and corresponding rotation of the movable forceps arm about the hinge pin axis no positive engagement of the hinge pin is effected. Only a rotary displacement of the movable pliers leg beyond the usual Zangenmaulöffnungsmaß addition leads over a boundary surface of the driving recess to a Drehitschleppen the hinge pin. Thus further has the driving recess viewed in the circumferential direction on a width that allows a conventional opening of the forceps jaw up to an opening angle of 20 to 25 ° without positive engagement of the hinge pin.

If the hinge pin is also designed to displace the same in the direction of the axis of rotation in order to cancel the meshing engagement, the user is offered one or the other type of adjustment. In this context, it is further preferred that the driving recess has at least one axial depth, which corresponds to the stroke when moving the hinge pin in the direction of the axis of rotation plus the axial thickness of the driving projection. The driving projection of the hinge pin can adapted to the axial depth of the driving recess have a corresponding axial length. Alternatively, it is provided in this regard that the driving projection has only such an axial depth that it rests in the unloaded in the direction of the axis of rotation and by the user in the Mitnahmeausnehmung; however, leaves in the loaded position to cancel the gear engagement by displacement of the hinge pin in the direction of the axis of rotation, the driving recess. Next, the driving recess may represent an opening of the hinge pin receiving bore edge, which opening opens to the longitudinal slot of the fixed pliers limb out. Accordingly, the longitudinal slot can continue Also serve to accommodate the driving projection when depressed hinge pin.

Further, it is preferred that the spring acts on the hinge pin only. It is supported on the one hand on the thigh and on the other hand on the hinge pin. A loading of other elements, such as the movable pliers leg is not given. On the other hand, of course, the movable pliers legs indirectly, by means of the fitting into the bores of the movable pliers limb corresponding portions of the hinge pin by the spring also applied.

In particular, it is also preferred that the spring acts directly between the leg and the hinge pin. A deflection or translation of the spring force, for example by means of a lever preferably does not take place.

With regard to the interaction with the leg it is also preferred that the spring is supported on a portion of the leg forming the longitudinal slot. It is thus given a very close local relationship between the two bases of the spring, the hinge pin and the thigh. The spring can be made comparatively small. A compact construction is possible.

The slot width of the longitudinal slot is preferably selected to be continuous so that the hinge pin is movable in the longitudinal slot transversely to its longitudinal extent, preferably in each toothed position corresponding to a mouth width.

With regard to the further embodiment of the interaction of the hinge pin with the spring is also preferred that the spring is received in the hinge pin with a direction of action transverse to its longitudinal axis. Consequently can also be achieved an actual parallelism of the direction of action of the spring to the plane defined by the forceps legs plane.

Furthermore, it is preferred that the spring, at least in view of their interaction with the leg, acts on a spherical body and in turn the ball body cooperates with the leg. For this purpose, suitably the spherical body in a bore of the hinge pin, in which the spring is received, be supported. Insofar as usual, the bore can be caulked with the ball body therein, so that the ball is not lost even when disassembling the pliers. On the other hand, this is not absolutely necessary, as well as other form fit, such as with a running training in the thigh, the holder of the ball body operatively, so apart from disassembly, can be secured.

The hinge pin is further preferably formed in a cross section, at least in the cooperating with the leg portion, so that when teeth engagement of the hinge pin partially rests partially and partially on the spring element on the opposite edge. This has the advantage that with a suitable design when operating the pliers, the immediate system can absorb the reaction force.

In order to offer the user an opportunity to secure the found forceps jaw opening width, offers a blockage of the hinge pin, so that a repeal of the meshing intervention is prevented or is only possible after lifting the blocking. Thus, it is provided in a preferred embodiment of the article that the spring is selectively brought out of action such that they bring to the disengagement of the teeth does not work. The, acting on a longitudinal edge flank of the longitudinal slot ball acting spring is prevented in a preferred embodiment from springing, resulting in a blockage of about Spring and ball supporting hinge pin causes. This blocking position can be deliberately brought about, this for example by appropriate structural means on the hinge pin or on or on the pliers legs. Thus, for example, a pin or the like can be brought into a blocking position on the hinge pin, for example, for engagement in the deflection space required for the Verzahnungsaufhebung alternative space of the hinge pin. In this regard, it is preferred that a pin which is movable in the direction of the axis of rotation of the hinge pin is provided in the hinge pin in order to bring the spring out of operation. This pin acts directly or indirectly on the spring in such a way that it can not deflect. Accordingly, it is not possible for the ball acted upon by the spring to dip, which is necessary for displacing the hinge pin transversely to its axis of rotation.

With regard to the longitudinal slot is also preferred that only one longitudinal edge of the fixed toothed leg is formed with a toothing, with which then engagement teeth of the hinge pin cooperate in each case. The other, non-toothed longitudinal edge is preferably formed smooth.

Moreover, it is preferred that the toothing, which is formed on the fixed pliers limb, forms overflowable flank angles in the closing direction of the pliers jaw. As a result, an immediate delivery of the forceps jaw on the object is possible. Because of the described embodiment of the hinge pin namely by simple movement of the pliers legs relative to each other in the longitudinal direction. An adjustment of the hinge pin is not required. The hinge pin overruns the teeth ratchet like this. This in turn achieved by the spring, which allows the ratchet-like evasion.

In this context, it is particularly preferred that the flank angle of a tooth formed on the stationary forceps limb, the opposing tooth, with which an engagement tooth of the hinge pin when moving the movable pliers limb comes into cooperation in the closing direction of the forceps jaw, with a longitudinal axis of the longitudinal slot includes a significantly smaller angle than the counter flank of the counter tooth, against which the corresponding engagement tooth of the hinge pin is supported upon actuation of the forceps. In detail, this is also dependent on the tooth geometry of the hinge pin. It must be ensured that the overflow is ensured in the closing direction of the mouth, whereas a stable holding is achieved in the opening direction of the forceps muzzle. Suitable angles of the tooth flank between 20 ° and 60 °, based on the smaller angle, and 80 ° to 110 °, relative to the larger angle. The latter tooth flank (larger angle) can also be fundamentally negatively directed, that is to say have an undercut with respect to a vertical line on the said longitudinal axis.

If one also wants to speak of the sweep of the teeth (in a cross-sectional view), the cooperating engagement teeth of the pivot pin are swept in the opposite direction. Accordingly, with regard to the flanks, viewed in the engaged state, opposite or identical conditions arise.

As will be explained further below, the longitudinal slot can also have a curved longitudinal center line deviating from a straight longitudinal axis. In this respect, in the context described here, a respective tangent to the center line or a linear connection, not corresponding in the geometrical sense of a longitudinal axis, between end points of the longitudinal slot is then spoken of.

The hinge pin further preferably has two opposite, flattened sides, wherein only formed on one of the sides for Verzahneingriff hinge pin teeth.

Fig. 1

die Zange in perspektivischer Schrägansicht, eine erste Ausführungs-form betreffend;

Fig. 2

eine Herausvergrößerung des Abschnittes II in Figur 1;

Fig. 3

einen Querschnitt durch den Gegenstand gemäß Figur 1 bzw. Figur 2, geschnitten entlang der Linie III-III in Figur 2;

Fig. 4

einen Querschnitt durch den Gegenstand gemäß Figur 1 bzw. Figur 2, geschnitten in der Ebene des Festschenkels, begrenzt auf den Längsschlitz im Festschenkel;

Fig. 5

eine Darstellung gemäß Figur 4, wobei der Gelenkbolzen durch ledigliche Zugbelastung des beweglichen Zungenschenkels außer Eingriff ist;

Fig. 6

eine der Figur 5 entsprechende Darstellung, bei gleichzeitiger Verschwenkung des beweglichen Zangenschenkels;

Fig. 7

eine Unteransicht der Zange gemäß Figur 1;

Fig. 8

eine Einzeldarstellung des Gelenkbolzens, gesehen in Längsrichtung des Längsschlitzes;

Fig. 9

eine Darstellung gemäß Figur 8, jedoch gesehen quer zur Längsrichtung des Längsschlitzes;

Fig. 10

eine Darstellung gemäß Figur 9, jedoch gesehen aus der entgegengesetzten Richtung; und

Fig. 11

einen Querschnitt durch den Gegenstand gemäß den Figuren 8 bis 10, geschnitten entlang der Linie XI-XI in Figur 9,

Fig. 12

die Zange in perspektivischer Schrägansicht, eine zweite Ausführungsform betreffend;

Fig. 13

eine perspektivische Detaildarstellung mit Blick auf die Rückseite der Zange, den rückwärtigen, federbelasteten Bolzenbereich betreffend;

Fig. 14

den Zangenkopfbereich in vergrößerter Darstellung bei Einstellung einer geringen Maulöffnungsweite;

Fig. 15

eine der Figur 14 entsprechende Darstellung, jedoch nach Einstellung einer großen Maulöffnungsweite;

Fig. 16

den Schnitt gemäß der Linie XVI-XVI in Figur 14;

Fig. 17

ein in Querschnitt durch die Zange gemäß der Darstellung in Figur 5, die Zange der zweiten Ausführungsform betreffend;

Fig. 18

den Zangenkopf in einer weiteren Ausführungsform mit einem einen Beaufschlagungsvorsprung aufweisenden Gelenkbolzen, die Zangenmaulschließstellung betreffend;

Fig. 19

die Herausvergrößerung des Bereiches XIX in Fig. 18, jedoch im Zuge einer Aufhebung der Verrastung zwischen Gelenkbolzen und Zangenschenkel;

Fig. 20

eine der Fig. 19 entsprechende Darstellung, jedoch die Stellung bei freigegebenem Verzahnungseingriff betreffend;

Fig. 21

eine perspektivische Darstellung des Gelenkbolzens gemäß der Ausführungsform in den Fig. 18 bis 20;

Fig. 22

eine weitere perspektivische Darstellung des Gelenkbolzens;

Fig. 23

in perspektivischer, partiell geschnittener Darstellung den Zangenkopf in einer weiteren Ausführungsform, gleichfalls mit einem einen Beaufschlagungsvorsprung aufweisenden Gelenkbolzen;

Fig. 24

eine perspektivische Einzeldarstellung einen alternativen, gegenüber dem in Fig. 23 dargestellten Gelenkbolzen in Richtung seiner Drehachse schiebeverlagerbaren Gelenkbolzen;

Fig. 25

den Zangenkopfbereich der Ausführungsform gemäß Fig. 24, bei Aufhebung des Verzahnungseingriffs;

Fig. 26

eine perspektivische Teildarstellung des Zangenkopfbereichs, eine weitere Ausführungsform mit einem in Richtung der Drehachse verlagerbaren Gelenkbolzen;

Fig. 27

eine weitere perspektivische Darstellung, hier jedoch lediglich des Zangenkopfbereiches des festen Zangenschenkels, mit einem alternativen, nicht schiebeverlagerbaren Gelenkbolzen;

Fig. 28

den Zangenkopfbereich mit einem Gelenkbolzen gemäß der Darstellung in Fig. 27, die Eingriffsstellung der Verzahnung betreffend;

Fig. 29

den Zangenkopfbereich in einer Zangenmaulöffnungsstellung, weiterhin die Eingriffsstellung der Verzahnung betreffend;

Fig. 30

eine Zwischenstellung im Zuge der Aufhebung des Verzahnungseingriffs bei weiterem Verschwenken des beweglichen Zangenschenkels gegenüber dem festen Zangenschenkel;

Fig. 31

eine Folgedarstellung der Fig. 30, jedoch die aufgehobene Stellung des Verzahnungseingriffs betreffend;

Fig. 32

eine weitere perspektivische Darstellung der Ausführungsform gemäß den Darstellungen in den Fig. 26 bis 31;

Fig. 33

eine der Fig. 18 entsprechende Darstellung, jedoch eine weitere Ausführungsform betreffend, in welcher der Gelenkbolzen durch einen einschwenkbaren Speerstift in der Verzahnungsstellung drehgehindert ist;

Fig. 34

den Gelenkbolzen der Ausführungsform gemäß Fig. 33 in perspektivischer Einzeldarstellung, die Freigabestellung betreffend;

Fig. 35

den Gelenkbolzen in Seitenansicht, die Sperrstellung betreffend;

Fig. 36

den Gelenkbolzen gemäß Fig. 35 in perspektivischer Darstellung;

Fig. 37

in perspektivischer Darstellung den Gelenkbolzen in einer weiteren Ausführungsform mit einem Sperrhebel, die Freigabestellung betreffend;

Fig. 38

die Draufsicht hierzu;

Fig. 39

eine der Fig. 37 entsprechende perspektivische Darstellung, jedoch die Sperrstellung zur Hinderung der Drehverlagerung des Gelenkbolzens betreffend;

Fig. 40

den Gelenkbolzen einer weiteren Ausführungsform in einer EinzelPerspektivdarstellung;

Fig. 41

eine perspektivische Längsschnittdarstellung durch den Gelenkbolzen gemäß Fig. 40, eine Sperrstellung der Gelenkbolzen-Kugel betreffend;

Fig. 42

einen Ausschnitt des Gelenkbolzens in einer Schnittdarstellung gemäß der Schnittebene XLII in Fig. 40;

Fig. 43

eine perspektivische Schnittdarstellung gemäß Fig. 41; jedoch die Freigabestellung der Gelenkbolzen-Kugel betreffend;

Fig. 44

eine Ausschnittdarstellung in einer zu der Darstellung in Fig. 42 quer gerichteten Schnittebene, den Bereich der Gelenkbolzen-Kugel in der Freigabestellung betreffend.

In the following, the invention will be explained further with reference to the attached drawing, which, however, represents only several exemplary embodiments. Hereby shows:

Fig. 1

the pliers in perspective oblique view, concerning a first embodiment;

Fig. 2

an enlargement of section II in FIG. 1 ;

Fig. 3

a cross section through the article according to FIG. 1 respectively. FIG. 2 , cut along the line III-III in FIG. 2 ;

Fig. 4

a cross section through the article according to FIG. 1 respectively. FIG. 2 , cut in the plane of the thigh, limited to the longitudinal slot in the thigh;

Fig. 5

a representation according to FIG. 4 wherein the hinge pin is disengaged by merely pulling the movable tongue leg;

Fig. 6

one of the FIG. 5 corresponding representation, with simultaneous pivoting of the movable pliers limb;

Fig. 7

a bottom view of the pliers according to FIG. 1 ;

Fig. 8

an individual view of the hinge pin, seen in the longitudinal direction of the longitudinal slot;

Fig. 9

a representation according to FIG. 8 but seen transversely to the longitudinal direction of the longitudinal slot;

Fig. 10

a representation according to FIG. 9 but seen from the opposite direction; and

Fig. 11

a cross section through the article according to the FIGS. 8 to 10 , cut along the line XI-XI in FIG. 9 .

Fig. 12

the pliers in perspective oblique view, concerning a second embodiment;

Fig. 13

a detailed perspective view with respect to the back of the pliers, concerning the rear, spring-loaded bolt area;

Fig. 14

the pliers head area in an enlarged view when setting a small jaw opening width;

Fig. 15

one of the FIG. 14 corresponding representation, but after setting a large jaw opening width;

Fig. 16

the section according to the line XVI-XVI in FIG. 14 ;

Fig. 17

in cross-section through the pliers as shown in FIG FIG. 5 concerning the pliers of the second embodiment;

Fig. 18

the pliers head in a further embodiment with a hinge pin having a Beaufschlagungsvorsprung concerning the forceps closing position;

Fig. 19

the enlargement of the area XIX in Fig. 18 , but in the course of a lifting of the locking between the hinge pin and pliers legs;

Fig. 20

one of the Fig. 19 corresponding representation, however, the position with released gear engagement regarding;

Fig. 21

a perspective view of the hinge pin according to the embodiment in the Fig. 18 to 20 ;

Fig. 22

a further perspective view of the hinge pin;

Fig. 23

in a perspective, partially cut representation of the pliers head in a further embodiment, also with a Beaufschlagungsvorsprung having hinge pin;

Fig. 24

a perspective individual representation of an alternative, compared to in Fig. 23 illustrated hinge pin in the direction of its axis of rotation sliding displaceable hinge pin;

Fig. 25

the pliers head portion of the embodiment according to Fig. 24 if the interlocking action is removed;

Fig. 26

a partial perspective view of the pliers head portion, another embodiment with a displaceable in the direction of the axis of rotation hinge pin;

Fig. 27

a further perspective view, but here only the pliers head region of the fixed pliers limb, with an alternative, non-displaceable hinge pin;

Fig. 28

the pliers head area with a hinge pin as shown in FIG Fig. 27 , the engagement position of the gearing concerning;

Fig. 29

the pliers head region in a forceps jaw opening position, further the engagement position of the gearing concerning;

Fig. 30

an intermediate position in the course of the cancellation of the toothing engagement with further pivoting of the movable pliers limb relative to the fixed pliers limb;

Fig. 31

a following presentation of the Fig. 30 but concerning the canceled position of the meshing engagement;

Fig. 32

a further perspective view of the embodiment according to the representations in the Fig. 26 to 31 ;

Fig. 33

one of the Fig. 18 corresponding representation, however, concerning a further embodiment, in which the hinge pin is prevented from rotating by a pivotable spear pin in the toothed position;

Fig. 34

the hinge pin of the embodiment according to Fig. 33 in a perspective individual view concerning the release position;

Fig. 35

the hinge pin in side view, the locking position concerning;

Fig. 36

according to the hinge pin Fig. 35 in perspective view;

Fig. 37

in a perspective view of the hinge pin in a further embodiment with a locking lever, the release position concerning;

Fig. 38

the top view of this;

Fig. 39

one of the Fig. 37 corresponding perspective view, however, the locking position to prevent the rotational displacement of the hinge pin concerning;

Fig. 40

the hinge pin of another embodiment in a single perspective view;

Fig. 41

a perspective longitudinal section through the hinge pin according to Fig. 40 relating to a locking position of the hinge pin ball;

Fig. 42

a section of the hinge pin in a sectional view according to the cutting plane XLII in Fig. 40 ;

Fig. 43

a perspective sectional view according to Fig. 41 ; however, regarding the release position of the hinge pin ball;

Fig. 44

a detail in a to the representation in Fig. 42 transverse sectional plane, the area of the hinge pin ball in the release position regarding.

Shown and described, first with reference to the FIGS. 1 and 6 , Pliers 1 in a first embodiment in the manner of a water pump pliers with two pliers legs 2, 3. The pliers legs 2, 3 intersect in a hinge pin. 4

The forceps leg 2 is a fixed pliers leg. The pliers leg 3 is movable relative to the pliers leg 2 to change the mouth width.

The pliers legs 2, 3 form on one side of the hinge pin 4 handle portions 5, 6 and on the other side of the hinge pin 4 jaws 7 and 8. The crossing region of the legs 2 and 3 associated with the fixed leg 2 is provided with a longitudinal slot 9. This passes through the hinge pin. 4

The movable pliers leg 3 is fork-shaped in the crossing region, for flanking the longitudinal slot 9 having festoons section on both sides. The hinge pin 4 is rotatably supported in the fork portions of the movable leg 3.

The hinge pin 4 has radially outward engagement teeth 10 which cooperate with the sliding determination of the movable pliers limb 3 along with an associated edge 12 in the longitudinal slot 9 arranged counter teeth 11 together.

The toothing engagement of the hinge pin 4 to the longitudinal slot toothing is supported by a force acting on the bolt 4 spring 13, here in the form of a cylinder compression spring. This is located in a radially directed to the bolt axis, radially outwardly open bore 17 and is supported with its radially beyond the bolt 4 projecting free end, on which the counter teeth 11 having flank 12 opposite flank 14 of the longitudinal slot 9 from.

The support is not directly on the flank 14, but rather indirectly with the interposition of a ball 15th

The movable pliers leg 3 is by means of its bores 19,19 ', which are penetrated by the hinge pin 4, rotatably mounted on the stationary pliers legs 2, wherein the pin axis forms the axis of rotation A.

In the fixed pliers limb 2 is a longitudinal slot 9 (see also in particular FIG. 4 ), in which the hinge pin 4 and thus at the same time the movable pliers leg 3 is adjustable.

By the forceps arms 2, 3 can be seen at the same time a plane (set of planes, perpendicular to the axis of rotation A extending) spanned. In a direction oriented on this plane or with a movement in this plane, a toothing engagement takes place between the hinge pin 4, namely its engagement teeth 10, cf. also FIG. 9 , and the mating teeth 11, which are formed on a flank 12 of the longitudinal slot 9. As a result, by ratchet-like overflow between an engagement tooth 10 and a counter tooth 11 - when moving in the closing direction of the forceps jaw - zw. By active movement of the teeth 10, 11 disengaged, move by at least one tooth width and restore the tooth engagement due to spring force - when moving in Opening direction of the forceps jaw -, the movable pliers leg 3 is gradually adjustable relative to the fixed pliers legs 2.

A flank of a counter tooth 11 to be overrun when moving in the mouth closing direction from the hinge pin encloses an angle α of approximately 40 ° with a longitudinal axis (here specifically a tangent to the longitudinal axis of the curved longitudinal slot 9), while the counter flank of the same counter tooth 11 coincides with the Longitudinal axis forms an angle β of about 95 °.

The toothing engagement between the hinge pin 4 and the longitudinal slot 9, that is, concretely the teeth 11 of the flank 12 of the longitudinal slot 9, by a directly acting between the leg 2 and the hinge pin 4 spring 13, see. approximately FIG. 4 , supported. In the embodiment, the engagement teeth 10 are biased in the valleys between the mating teeth 11 a.

The support 13 is acted upon, in addition to its support on the leg 2, only the hinge pin 4. The support is, with the exception or by means of the ball 15, directly between the hinge pin 4 and the flank 14 of the leg 2. Against this, the spring is supported Due to the ball 15 is a very low coefficient of friction, which is favorable in terms of adjustment, between the hinge pin 4, and the spring 13 and the fixed leg 2, achieved.

The illustrated pliers 1 is adjustable in two ways. Namely on the one hand, in principle, as in the aforementioned EP 528 252 A1 For example, also described by depressing the hinge pin 4 in the direction of the axis of rotation A. For this purpose acts on the hinge pin 4 in the direction of the axis of rotation A, opposite to its upper side loading side, designed as a torsion spring compression spring 16 (see also FIG. 3 ). Next, the hinge pin 4 for this purpose is formed on the underside with a continuous peripheral edge bead 18. The spring 16 can not slip off about the hinge pin 4 so. The spring 16 is in the embodiment a - front, in the interaction region with the hinge pin, slightly bent - leaf spring.

On the other hand, as also described above, the hinge pin 4 can be adjusted by simply moving relative to each other of the pliers legs 2, 3, in said plane. In this case, in detail, first by pressurizing via the bore 19 (FIG. FIG. 3 ), optionally also at corresponding guide portions 20, in the opposite bore portion 19 'of the fork-shaped movable pliers limb 3, a pressure displacement of the hinge pin 4 against the action of the spring 13 in a position according to FIG. 5 or FIG. 6 achieved, after which then a shift in the longitudinal direction of the longitudinal slot 9 in the desired extent is readily possible. For this purpose, a width B of the longitudinal slot 9, see, for example FIG. 4 , chosen so that even in the disengaged state of the hinge pin 4, in which therefore the teeth are not engaged with each other ( FIG. 5 ), nor a displacement of the hinge pin in the longitudinal direction of the longitudinal slot 9 is made possible. When said pressurization of the hinge pin 4 is abandoned by means of the movable pliers limb 3, the toothing engagement between the hinge pin 4 and the toothed flank of the longitudinal slot 9 again arises at this point in the longitudinal slot 9 due to the action of the spring 13.

As from the in FIG. 5 To recognize the representation shown, the hinge pin 4 can be released from the teeth in single tensile load of the movable pliers limb 3 transversely to the longitudinal extent of the longitudinal slot 9. This tensile load can, as in FIG. 5 shown, take place substantially perpendicular to the longitudinal center line of the curved longitudinal slot 9, this from the in FIG. 5 in dash-dotted lines reproduced working position out. In the course of this predominantly linear displacement of the movable pliers limb 3, the hinge pin 4 is acted upon substantially through the bore 19, which due to a line-like pivoting of the hinge pin 4 permitting support thereof on the opposing teeth 11 opposite edge 14 of the longitudinal slot 9 emigration of joint bolt-side mating teeth 10 result. The hinge pin 4 is impressed by the tensile load acting on it, this further by overcoming the force of the in-bore 17 and the ball 15 acting on the edge 14 spring 13th

As in further FIG. 6 shown, the tensile load of the movable pliers arm 3 can also be superimposed transversely to the longitudinal axis of the longitudinal slot 9 by a pivoting of the pliers arm 3 about the axis of rotation A of the hinge pin 4. The pivoting of the movable pliers leg 3 alone does not cancel the teeth between hinge pin 4 and mating teeth 11th

Due to the special shape of the hinge pin 4 in cross section, such as out FIG. 4 but also out FIG. 10 can be seen, the hinge pin 4 nonetheless, viewed in the longitudinal direction of the longitudinal slot 9, on the one hand a portion, mouth side of the spring 13, which corresponds approximately to the free width B of the longitudinal slot 9 and on the other hand, maulabgewandt the spring 13, a portion of a width G, the in any case about the extent of the meshing engagement is less than the width B (also the width G is based on the free width of the longitudinal slot 9). In addition, as is apparent from the above representations, this region of the cross section of the hinge pin 4 is also, seen in the longitudinal direction of the longitudinal slot 9, tapered. The narrow area is maulabgewandt. The said width G results directly in the maulabgewandten edge region of the bore 17 (see, for FIG. 11 ), which receives the spring 13. The taper, which is in the above-mentioned cross section in the form of a practically straight surface, begins already on the mouth side of the bore 17th

The cross section of the hinge pin 4, based on the illustration in FIG. 4 is further substantially trapezoidal, wherein the trapezoidal transverse surfaces are rounded. These trapezoid transverse surfaces partially form support zones in the bores 19 and 19 'of the movable pliers limb (see also FIGS FIG. 3 ). The ball 15 breaks in this regard, a trapezoid longitudinal side.

In the vertical direction of the hinge pin 4, as this particular from the FIGS. 8 to 10 results, initially formed from a lower, preferably circular base 21, which merges with the diameter dimension of this base in the above-mentioned trapezoidal narrow sides 22, 23. With respect to a total height H of the hinge pin 4 down, that is offset to the base 21, the bore 17 is formed. The Versetzmaß this corresponds to about half of the diameter, that is about the radius of the bore 17th

A central axis of the bore 17, which is perpendicular to the surface 24, in which the ball 15 exits, extends according to a diameter line of the circular base 21 (seen in a plane transverse to the longitudinal axis of the hinge pin 4, with the above-mentioned axis of rotation A coincides).

The bore 17 is otherwise a blind hole, so does not occur on the opposite sides to the outside.

The opposite side, on which the engagement teeth 10 are formed in the lower region, is hereinafter, as is apparent from FIG. 11 results in rounded outside the engagement teeth 10 in the illustrated cross section. The engagement teeth 10 are formed offset relative to a longitudinal axis or center line of the longitudinal slot 9 to maulabgewandten side in said cross-section 10 out. They are formed corresponding maulabgewandt a longitudinal axis of the bore 17. In connection with the ball 15 also results in an advantageous behavior corresponding to a tilting moment with which the disengagement of the hinge pin 4 due to a tensile load in maulabgewandter direction of the movable pliers leg 3 relative to the fixed, and this held in mind, festivals 2 can be achieved.

The engagement teeth 10 extend over a height of the hinge pin 4, which corresponds to about 1.5 times the height of the base 21 or 20% to 35%, preferably about 25% to 30%, the height H of the hinge pin 4.

Overall, three engagement teeth 10 are realized in the embodiment. The tooth roots lie on a secant line with respect to the diameter of the base 21 extending line.

On the upper side of the hinge pin 4, a button part 25 is arranged, which is held by way of a central pin in a depression of the hinge pin in the rest. The knob 25, whose outer diameter is slightly smaller than the outer diameter of the base 21, protrudes over the surfaces 24 and the opposite surface like a roof.

The FIGS. 12 to 17 show a pair of pliers 1 in a second embodiment in the manner of a key pliers. Such a pair of key pliers, for example, from the EP 0 421107 B1 known. The content of this patent is hereby incorporated in full in the disclosure of the present invention, also for the purpose of including features of this patent in claims of the present invention.

The wrench 1 also has a movable pliers leg 3 and a fixed leg 2, which merges the latter material uniformly in a bearing plate 26. In this bearing plate 26 a formed according to the first embodiment longitudinal slot 9 is formed. This has counter teeth 11 on a longitudinal flank facing the forceps jaw 12, for engagement with engagement teeth 10 of a hinge pin 4 connecting the movable limb 3 with the fixed limb 2.

The configuration of the mating teeth 11, in particular the alignment of the tooth flanks, is chosen to be the same as that of the first exemplary embodiment.

In which the handle portion 5 of the fixed forceps leg 2 remote area of the bearing plate 26 is a material compared to the bearing plate 26 thickened jaw 7 is arranged. This jaw 7 is opposite a movable jaw 8, which is formed substantially symmetrical to the jaw 7. The movable jaw 8 forms in its lower region two resting on the surfaces of the bearing plate 26 and these in their upper region cross-arm 27, which on the bearing plate 26 facing inner sides Wear guide sections 28. These engage in above the longitudinal slot 9, ie facing the forceps jaw in two opposite surfaces of the bearing plate 26 incorporated guide grooves 29, which guide grooves 29 are aligned rectilinearly parallel to a linear connecting line between the end points of the longitudinal slot 9. Accordingly, the movable forceps jaw 8 in the direction of the jaw 7 and from this away linearly displaceable on the bearing plate 26.

Facing the longitudinal slot 9, the movable forceps jaw 8 is provided on both sides of the bearing plate 26 with substantially U-shaped joint recesses 30. These are turned open to the longitudinal slot 9. These serve to receive pivot pin 31 and protrude radially outwardly from the hinge pin 4 bordering leg end portions 32 of the movable pliers limb 3, which leg end portions 32 end of the movable pliers limb 3 in the region of the bearing plate 26 on both sides fork portion 33 are formed.

The movable pliers limb 3 is rotatably displaceable about the axis of rotation A defined by the hinge pin 4. By rotary displacement, the movable jaw 8 is linearly guided in the direction of the jaw 7 due to the displacement of the pivot pin 31 on a circular section track.

The hinge pin 4 of the pliers 1 according to the second embodiment is the same as that of the previously described embodiment. Accordingly, reference is made to the first embodiment with respect to the configuration of the toothing and the configuration of the hinge pin as such.

There are also adjustment options in two ways. Namely, on the one hand, the basically conventional by depressing the hinge pin 4 in the direction of the axis of rotation A against the rear acting on the hinge pin 4 force of the spring 16th

On the other hand, the hinge pin 4 can be adjusted by merely moving the pliers legs 2 and 3 relative to each other in the plane described here. By merely tensile load of the movable pliers limb, the hinge pin 4 is moved out of the meshing engagement with the toothing of the longitudinal slot 9. Thus, even without manipulation on the hinge pin 4 itself an adjustment of the jaw width, d. H. the spacing of the jaws 7 and 8 are performed to each other.

The FIGS. 18 to 22 show the pliers 1 in a further embodiment in the manner of a water pump pliers, which is constructed substantially the same as that with reference to Fig. 1 ff described first embodiment.

Thus, two pliers legs 2 and 3 are also provided here, which intersect in the hinge pin 4. The pliers leg 2 is a fixed pliers leg, to which the pliers leg 3 is movable relative to the change of the mouth width.

Also in this embodiment, the movable pliers limb in the crossing region is fork-shaped, for flanking the longitudinal slot 9 having festoons section on both sides. The hinge pin 4 is rotatably supported in the fork portions of the movable leg 3.

The radially outwardly directed engagement teeth 10 of the hinge pin 4 cooperate for sliding determination of the movable pliers limb 3 along with an associated flank 12 in the longitudinal slot 9 arranged counter teeth 11 together.

Also, the toothing engagement of the hinge pin 11 is supported to the longitudinal slot toothing by acting on the bolt 4 spring 13, which spring 13 indirectly with the interposition of a ball 15 at the the longitudinal slot toothing opposite flank 14 of the longitudinal slot 9 is supported.

To offer a possibility for canceling the engagement between the hinge pin 4 and counter teeth 11, without direct actuation of the hinge pin 4 by applying pressure and displacement thereof along the axis of rotation A, the hinge pin is in the in the FIGS. 18 to 22 illustrated embodiment provided in a cross section in the plane defined by the longitudinal slot 9 plane or plane share with a Beaufschlagungsvorsprung 34. For this purpose, the hinge pin 4 is designed substantially trapezoidal in this plane, with two aligned approximately parallel to each other trapezoidal longitudinal sides 24 and 35. The central axis of the spring 13 and the ball 15 receiving bore 17 is i. W. perpendicular to the surfaces of the longitudinal sides 24 and 35. The ball 15 emerges from the surface 24 according to the first embodiment.

The flat trapezoidal surface 35 extends in cross-section approximately from the central axis of the bore 17, starting outward under attack of the preferably circular base 21 of the hinge pin 4, this with a supernatant, which corresponds approximately to the diameter of the ball 15. At the end, the trapezoid longitudinal side 35 passes over into a trapezoidal narrow side 22 enclosing an approximately 60 ° angle to the longitudinal trapezoidal side 35, which in turn runs into the opposite longitudinal side 24 oriented parallel to the trapezoid longitudinal side 35.

The transition region from the long side 35 to the narrow side 22 is rounded, to form the Beaufschlagungsvorsprunges 34. This projects accordingly in a projection on the bore 19 and 19 'of the movable pliers limb 3 via the bore edge 3 in the free space of the longitudinal slot 9 a.

The trapezoid longitudinal side 35 is facing away from the Beaufschlagungsvorsprung 34 in the engagement teeth, which engagement teeth 10 are positioned on a plane perpendicular to the pivot plane of the hinge pin 4 level, which includes an obtuse angle to the longitudinal side 35 in cross section, so on about an angle of 165 ° ,

The loading projection 34 is directed in the direction of the pliers head associated longitudinal slot base edge 36. This base flank 36 extends transversely to the longitudinal flanks 12 and 14 of the longitudinal slot 9.

The transition regions, in particular the transition region from the base flank 36 to the flank 12 having the mating teeth 11, are rounded strongly to form a control curve 37.

The arrangement is further selected such that in a toothed position as shown in FIG Fig. 18 between the trapezoidal longitudinal surface 24 and the associated edge 14 of the longitudinal slot 9 and between the trapezoidal longitudinal side 35 and the facing edge 12 of the longitudinal slot 9 each have a gusset-like clearance 38, 39 sets, with a respective opening angle of about 15 °.

The biasing projection 34 is off-center, in particular in this basic position with respect to a the axis of rotation A of the hinge pin 4 crossing longitudinal central axis of the longitudinal slot 9, the edge 12 arranged facing.

Further, the hinge pin 4, viewed in the longitudinal direction of the longitudinal slot 9, on both sides of the spring 13 and the ball 15 receiving bore 17 formed with a width G, which is at least about the extent of the meshing less than the width B of the longitudinal slot 9. Specifically is further the width G 'of the hinge pin 4 in the region of the longitudinal slot 9 mouth side of the bore 17th reduced by the transversely to the longitudinal slot extension considered height dimension of the engagement teeth 10 relative to the width dimension G.

Like from the FIGS. 19 and 20 To recognize, the hinge pin 4 can be released from the teeth in single tensile load of the movable pliers arm 3 in the direction of the longitudinal extension of the longitudinal slot 9, this starting from a minimum nose position according to Fig. 18 in which the engagement teeth 10 of the hinge pin 4 engage in the last counter teeth 11 of the longitudinal slot 9 considered with reference to the base flank 36. As already described in the previous embodiments, this position can also be achieved from a different mouth position by ratchet-like displacement. By further zugbelastete displacement of the hinge pin 4 in the direction of the base edge 36 - this optionally with simultaneous pivotal displacement by a few degrees of the movable pliers arm 3 in the direction of a mouth opening position - occurs with respect to the longitudinal center axis of the longitudinal slot 9 eccentric Beaufschlagungsvorsprung 34 against the base edge 36 of the longitudinal slot 9, which causes due to the rounded contour of the Beaufschlagungsvorsprunges 34 and its eccentric arrangement a direction-controlled forced rotation displacement of the hinge pin 4, wherein further the control cam 37 further supports this forced rotational displacement. With reference to the representations in the Fig. 18 to 20 In this case, a rotational displacement counterclockwise about the axis of rotation A. By pressing the ball 15 against the force of the compression spring 13 pivots the trapezoid longitudinal surface 24 in the direction of the associated edge 14 of the longitudinal slot 9, for final investment in the same. In this position, the opposite engagement teeth 10 are moved from the mating teeth 11 of the longitudinal slot 9. By supporting the Beaufschlagungsvorsprunges 34 on the base edge 36 of the longitudinal slot 9 while maintaining the load on the movable pliers leg 3, the hinge pin 4, a torque in the lifting direction of the toothing impressed.

While maintaining a transversely directed to the longitudinal extent of the longitudinal slot 9 tensile force on the movable pliers leg 3 on the hinge pin 4 of this remains in the contact position of the trapezoidal surface 24 at the associated longitudinal slot edge 14 in accordance Fig. 20 , so that a Maulweiteneinstellung, in particular Maulweitenvergrößerung under sliding displacement of the forceps leg 3 is reached.

The proposed solution according to the embodiment in the FIGS. 18 to 22 can be used both in connection with a displaceable along the axis of rotation A hinge pin 4 (over which displacement an alternative tooth suspension can be achieved) and with a hinge pin 4, which is not displaced in this form are used. In the latter case, a corresponding cancellation of the toothing can be achieved only by turning the hinge pin with the interaction of the loading projection 34 and the associated flank of the longitudinal slot 9.

An alternative embodiment of this embodiment show the FIGS. 23 to 25 , where in the Figures 23 and 25 a not displaceable in the direction of the axis of rotation A hinge pin 4 is provided. In this embodiment, the hinge pin 4 is provided in a cross-section in a longitudinal slot plane starting from a trapezoid narrow side 22 receiving the base contour with a pin-like loading projection 34 extending in the direction of the base flank 36 of the longitudinal slot 9. Also, this extends eccentrically with respect to a longitudinal central axis of the longitudinal slot 9, here facing the counter teeth 11 opposite edge 14th

The transition region from flank 14 to the base flank 36 is provided with a recess 40 forming a control curve 37.

In the gear meshing situation, the loading projection 34 on the mouth side of the hinge bolt bore 17 is supported on the associated longitudinal slot flank 14 off. In the course of a displacement of the movable pliers limb 3 in the direction of a minimum jaw width position as shown in FIG Fig. 23 occurs with Mitverlagerung of the hinge pin 4 on the leg-side holes 19 and 19 'of the Beaufschlagungsvorsprung 34 in the cam curve-like recess 40, wherein under further tensile load on the movable leg 3 in the direction of the longitudinal extension of the longitudinal slot 9 via the control cam 37 a forced rotary displacement of the hinge pin 4 is effected according to the embodiment described above. Again, with reference to the Figures 23 and 25 a forced rotational displacement of the hinge pin 4 in the counterclockwise direction, which causes the exit of the engagement teeth 10 from the counter teeth in the longitudinal slot 9 (see. Fig. 25 ). Also in this embodiment, after the cancellation of the tooth engagement while maintaining a tensile load transversely to the extension of the longitudinal slot 9 on the movable pliers leg 3, a Maulweitenverstellung done (see, dot-dashed line illustration in FIG Fig. 25 ).

The above-described embodiment can also be provided in connection with a hinge pin 4 that can be displaced along the axis of rotation A as an alternative to the toothed suspension. Such a hinge pin 4 is in Fig. 24 shown. In a sliding displacement of the hinge pin 4 to cancel the gear engagement of the Beaufschlagungsvorsprung 34 dives into the longitudinal slot 9.

The FIGS. 26 to 32 show a further embodiment, wherein the illustration in Fig. 26 refers to a hinge pin 4, which is slidably displaceable along the axis of rotation A for alternative teeth suspension according to the first embodiment. The other representations ( FIGS. 27 to 32 ) show an embodiment with a hinge pin 4 which is not schiebverlagerbar in the manner described above.

The hinge pin 4 is provided in the region of a cooperating with the leg bore 19 collar or portion of a trapezoidal narrow side 22 with a radially projecting driving projection 41. This engages in a projection on a plane oriented transversely to the axis of rotation A, the edge of the bore 19 and immersed in a radially inwardly into the bore edge incoming, radially outwardly of the bore 19 shaped driving recess 42 a. This driving recess 42 has in one embodiment of the hinge pin 4 according to the representations in the FIGS. 27 to 32 an axial depth corresponding to the axial height of the driving projection 41. If, however, a sliding displaceable hinge pin 4 as shown in FIG Fig. 26 provided, the driving recess 42 viewed in the axial direction is designed as a breakthrough; opens in accordance with axially inward in a preferred arrangement of the driving recess 42 in a projection within the longitudinal slot 9 in the direction of the longitudinal slot 9, whereby the driving projection 41 for selectively sliding displacement of the hinge pin 4 along the axis of rotation A to cancel the teeth an escape space is given. Accordingly, the driving recess 42 in this embodiment has at least one axial depth, which corresponds to the stroke when moving the hinge pin 4 in the direction of the axis of rotation A plus the axial thickness of the driving projection 41.

The entrainment recess 42 has a length considered in the circumferential direction of the associated bore 19, which essentially corresponds to the usual pivoting path of the movable pliers limb 3 between a mouth closing position and a mouth opening position. Thus, the driving recess 42 extends with respect to the axis of rotation A through an angle of about 25 °.

The hinge pin 4 is rotatably held in the movable leg 3. The Mitnahmeausnehmung 42, in which the driving projection 41 rests, follows the pivotal movement of the movable pliers limb 3, wherein the further Mitnahmevorsprung 41 in a forceps jaw closing position, such as in Fig. 28 shown, abuts one end of the driving recess 42.

The usual leg movement when handling the pliers 1 does not affect the driving projection 41 due to the longitudinal slot-like driving recess 42. Only with striking of the leg opening the entrainment projection 41 supplied edge of the driving recess 42 is a positive connection, which causes further entrainment of the movable pliers leg 3 on the usual Zangenmaulöffnungsmaß addition entrainment of the driving projection 41 via the driving recess 42. The radially oriented driving projection 41 acts like a lever on the hinge pin 4, which is hereby forced rotationally displaced, which leads to the cancellation of the toothing (see. Figures 30 and 31 ). Here, too, the hinge pin 4 on the above the usual opening dimension pivoted pliers leg 3 and the positive connection between Mitnahmeausnehmung 42 and Mitnahmevorsprung 41 torque impressed, this further by overcoming the force of the in-bore 17 and the ball 15 on the flank 14 acting spring 13th

Keeping the movable pliers limb 3 in the overmouth opening position, the hinge pin 4 remains in disengaged position relative to the toothing of the longitudinal slot 9, according to which a longitudinal displacement of the movable pliers limb 3 along the longitudinal slot 9 into the desired position can take place. By releasing the force acting on the driving projection 41, d. H. with release of the pliers limb 3 or rearward displacement thereof in the direction of a mouth closing position, the meshing engagement in the desired mouth width position is achieved.

The cancellation of the meshing engagement is in this embodiment from each detent position along the longitudinal slot 9 can be brought out.

The FIGS. 33 to 44 show three different embodiments to allow a targeted blocking of Ausrastmöglichkeit the hinge pin 4 in the transverse direction, for example, effected by train on the movable pliers legs 3 or by selective rotation control of the hinge pin 4 via a positive engagement according to the embodiment in the representations of FIGS. 26 to 32 or via a positive control according to the embodiments in the FIGS. 18 to 25 , wherein, despite blocking the lifting of the locking by targeted, ie volitional displacement of the hinge pin 4 along the axis of rotation A is quite possible.

So first in one embodiment ( FIGS. 33 to 36 ) the knob part 25 of the hinge pin 4 relative to the hinge pin 4 is provided rotatable about the axis of rotation A at least over a partial area. The button part 25 is further formed plate-like, projects beyond the segment-like in a projection on a direction transverse to the axis of rotation A plane, the trapezoidal surface 24 from which the ball 15 emerges. On the underside, the button part 25 facing the surface 24 is provided with a parallel to the axis of rotation A extending pin 43. This extends in the direction of the axis of rotation A viewed over the entire length of the surface 24 to the base 21. The pin 43 is rotatably held on the button part 25.

Further, the pin 43 is provided at the axial height of the engagement teeth 10 with a thickening 44 which dips in accordance with twisted button part 25 in the setting in the toothed position between the trapezoidal surface 24 and the associated longitudinal slot edge 14 gland-like free space 38 (see. Fig. 33 ) and thus prevents the possibility of pivoting of the hinge pin 4 about its axis of rotation A. Accordingly, the hinge pin 4 does not occur by turning about its axis of rotation A from the teeth. The trapezoidal surface 24 is supported in this situation on the thickened portion 44 of the pin 43 on the longitudinal slot edge 14 from. There remains correspondingly no clearance for the exit of the engagement teeth 10.

Viewed in the pivoting direction of the pin 43, the end of the trapezoidal surface 24 in the hinge pin 4 is provided with a pocket-like recess 45 which recedes relative to the surface 24. In this immersed the pin 43, in particular its thickened portion 44 for the rotational release of the hinge pin 4, this via rotary actuation of the knob part 25. In this rückverschwenkten position as shown in FIG Fig. 34 the pin 43 is in particular the thickening 44 not over the plane of the surface 24 stepping out in the recess 45 a. In this position, the gore-like space 38 is exposed, so that a pivotal displacement of the hinge pin 4 about its axis of rotation A to cancel the gearing engagement via pliers leg operation can be carried out according to the embodiments described above.

In a will-emphasized sliding displacement of the hinge pin 4 in the direction of the axis of rotation A, in which the engagement teeth 10 are displaced by linear displacement out of engagement with the mating teeth 11 of the longitudinal slot 9, the opposite of the thickened portion 44 tapered portion 46 of the pin 43 passes into the region of Longitudinal slot 9, which allows the sliding displacement of the hinge pin 4 within the longitudinal slot 9 for width adjustment in the pin-locking position.

An alternative embodiment show the FIGS. 37 to 39 , Here, to block the rotational mobility of the hinge pin 4 to cancel the toothing engagement facing the trapezoidal surface 24, an initially plate-shaped, parallel to the surface 24 extending locking element 47 is provided. This is initially in a recess 48 of the surface 24, wherein further the transverse to the axis of rotation A considered depth of the recess 48 corresponds to the considered in the same direction thickness of the locking element 47 corresponds. In this respect, the outwardly directed surface of the locking element 47 is aligned with the remaining surface 24 of the hinge pin. 4

The locking element 47 is pivotable about an axis oriented perpendicular to the axis of rotation A axis. The pivot axis is provided with the reference numeral 49. In a total of approximately triangular plan view of the locking element 47, the pivot axis 49 is provided in a corner region. Another, over the head portion 25 in each pivot position protruding corner area forms a handling portion 50 from. The third corner region carries a locking shoulder 41 aligned perpendicular to the axis of rotation A.

The pivot axis 49 is arranged with respect to the spring 13 and the ball 15 receiving bore 17 on the mouth side of the surface 24. The locking shoulder 51 is positioned with respect to this bore 17 opposite the pivot axis 49.

The blocking element 47 is further formed, for example in the form of a bent sheet metal part.

About the handling portion 50, the user can, for example, thumb actuated the locking element 47 from a in Fig. 37 shown hinge pin release position in a locking position according to Fig. 39 pivot. In this position, the locking shoulder 51 engages in between the surface 24 and the facing longitudinal slot edge 14 adjusting, gland-like free space 38, whereby the hinge pin 4 is locked against rotation about the axis of rotation A. Accordingly, no suspension of the meshing engagement can be brought about via a tensile or rotary load on the movable leg 3. A repeal of this tooth engagement by linear displacement of the hinge pin 4 along the axis of rotation A is still possible in this blocking element position. The locking shoulder 51 emerges in the course of the sliding displacement of the hinge pin 4 from the allocation area to the longitudinal slot 9.

Finally, the show FIGS. 40 to 44 an embodiment in which a blocking of Ausrastmöglichkeit in the transverse direction is achieved by blocking the in-bore 17 ball 15. This can therefore not dip by transverse loading, for example by appropriate train on the movable pliers leg 3 or conditionally caused by a forced rotary displacement load of the hinge pin 4. Accordingly, no clearance is given to move the engagement teeth 10 out of the counter teeth.

For this purpose, the ball 15 is first outwardly pointing dome-shaped with an inwardly dipping into the bore 17 cylinder portion 52. This is backward loaded by the compression spring thirteenth

The cylinder portion 52 is provided with a circumferential groove 53.

In disengagement of the ball 15 of the groove 53 is assigned a locking pin 54. This extends perpendicular to the bore 17 and thus parallel to the axis of rotation A within a correspondingly aligned bore 55 of the hinge pin 4. This bore 55 opens one end in the spring 13 and the ball 15 receiving bore 17 and the other end in the region of a radial extension 56 below the Bore 55 substantially overlapping collar surface of the button portion 25. The button portion 25 itself is further provided with a provided in overlap to the bore 55 opening 57 for the passage of a locking pin end portion 58.

The locking pin 54 has further assigned to the radial extension 56 of the bore 55 to a radial collar 59. This is loaded on the underside by a supported on the Radialerweiterungsboden compression spring 60 in the form of a cylindrical spring in the direction of the button portion 25, wherein further the radial collar 59 forms a stop for support on the facing underside of the button portion 25.

By intentional displacement of the locking pin 54 against the spring force of the compression spring 60, the free pin end 61 is moved into the groove 53 of the ball 15 for positive engagement, after which the ball 15 is blocked in its extended position.

This blocking position can be locked. For this purpose, an actuatable slide 62 is provided in the region of the actuating surface of the button part 25, which is linearly displaceable transversely to the axis of rotation A via a handle 63 in the direction of the locking pin end portion 58. The slider 62 faces the end portion 58 has a circular portion-shaped recess 64 which engages the locking pin 54 in a radially tapered portion of the locking pin end portion 58 formed by a circumferential groove 65, and so an automatic return control of the locking pin 54 in the ball release position prevented.

To release the ball 15 and thus to release the blocking of Ausrastmöglichkeit in the transverse direction, it only requires the return displacement of the slider 62, which is associated with a release of the locking pin end portion 58. The compression spring 60 then moves under relief the locking pin 54 in the normal position, which is accompanied by an extension of the pin end 61 of the ball groove 53.

Claims (15)

1. Pliers (1) with two pliers legs (2, 3) crossing at a pivot pin (4), one (3) of which legs is movable and the other (2) is fixed, and with a spring (13) between the fixed leg (2) and the pivot pin (4) acting in such a way as to assist interlocking engagement of the pivot pin (4), the pliers legs (2, 3) forming gripping portions (5, 6) on one side of the pivot pin (4) and a pliers mouth being formed on the other side of the pivot pin (4), furthermore the pivot pin (4), through which a pivot axis (A) of the movable pliers leg at the same time extends, being adjustable in a longitudinal slot (9) of the fixed pliers leg (2), and it being possible for the movable pliers leg (3) to be fixed by choice in relation to the fixed pliers leg (2) by means of interlocking engagement between the pivot pin (4) and the longitudinal slot (9) that takes place in the direction of a plane defined by the pliers legs (2, 3), characterized in that the pivot pin (4) is released from the interlock merely by pulling loading of the movable pliers leg (3) transversely in relation to the longitudinal extent of the longitudinal slot (9).
2. Pliers according to the features of the precharacterizing clause of Claim 1, characterized in that the interlock can be overcome at choice by moving the pivot pin (4) counter to the force of the spring (13) or by moving the pivot pin (4) in the direction of the pivot axis (A).
3. Pliers according to one of the preceding claims, characterized in that the movement of the pivot pin (4) is accompanied by a turning about the pivot axis (A), wherein, preferably, the turning is achieved by an off-center actuation of the pivot pin (4) with respect to the longitudinal slot (9).
4. Pliers according to one of the preceding claims, characterized in that the off-center actuation is achieved as a result of abutment of the pivot pin (4) against an end portion of the longitudinal slot (9).
5. Pliers according to one of the preceding claims, characterized in that the pivot pin (4) and/or the end portion of the longitudinal slot (9) has an actuating projection (34).
6. Pliers according to one of the preceding claims, characterized in that the pivot pin (4) is captured with positively locking engagement in a pliers leg (3) such that it is rotationally driven along by the pivoting movement, it only beginning to be carried along by the pivoting movement when the pliers mouth is partially open.
7. Pliers according to one of the preceding claims, characterized in that the pivot pin (4) has a radially extending driving projection (41), which engages in a radially inner driving recess (42) of the pliers leg (3) which having the bore (19) of the pivot pin (4), wherein, preferably, the driving recess (42) has at least an axial depth which corresponds to the travel when the pivot pin (4) moves in the direction of the pivot axis (A) plus the axial thickness of the driving projection (41).
8. Pliers according to one of the preceding claims, characterized in that the spring (13) only acts upon the pivot pin (4), wherein, preferably, the spring (13) is supported on a portion of the fixed leg (2) that forms the longitudinal slot (9).
9. Pliers according to one of the preceding claims, characterized in that the pivot pin (4) is movable in the longitudinal slot (9) transversely in relation to the longitudinal extent of the latter.
10. Pliers according to one of the preceding claims, characterized in that the spring (13) is accommodated in the pivot pin (4) with a direction of action that is transverse to the longitudinal axis (pivot axis A) of the latter and/or that the spring (13) acts on a spherical body (15), wherein, preferably, the spherical body (15) is held in a bore (17) of the pivot pin (4), in which the spring (13) is also accommodated.
11. Pliers according to one of the preceding claims, characterized in that, during interlocking engagement, the pivot pin (4) lies against the opposite flank, partially directly and partially by way of the spring element (13).
12. Pliers according to one of the preceding claims, characterized in that the spring (13) can be disabled by choice, wherein, preferably, to disable the spring (13), a pin (54) which is movable in the direction of movement of the pivot pin (4) in the direction of the pivot axis (A) is provided in the pivot pin (4).
13. Pliers according to one of the preceding claims, characterized in that the tooth formation is formed only on one longitudinal flank of the fixed pliers leg (2) and/or that the tooth formation has flank angles which can be run over in the closing direction of the pliers mouth, wherein, preferably, the flank ankle in the closing direction encloses an angle of 50° to 70°, preferably 60°, with a longitudinal axis of the longitudinal slot.
14. Pliers according to one of the preceding claims, characterized in that a counter flank encloses a flank angle of 80° to 100°, preferably 90°, with the longitudinal axis.
15. Pliers according to one of the preceding claims, characterized in that the longitudinal slot (9) is formed such that it extends in a curved manner in the longitudinal direction and/or that the pivot pin (4) has two opposite flattened sides, only one of the sides being provided with engaging teeth (10) that are formed for the interlocking engagement.

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