EP0774324B1 - Pliers with two plierarms - Google Patents

Abstract

The pliers have two arms connected by a pivot pin (4) and adjustable in a stepwise manner to open or close the gap (M) between the jaws (5,6). The first arm (2) passes through a dividing slot in the other (3). The pin has limited axial movement in holes (14) in two side walls of the second arm and has diametrically opposed flats (19,20) which allow it to fit between the sides (12) of a slot (11) in the other arm. The slot has rack teeth on each side which engage with teeth (21) on the pin flats and lock the pin rotationally and positionally. To adjust the jaws, the pivot pin is pushed from the head end (15) against the pressure of a leaf spring (23). This moves the pin sideways out of engagement with the slot teeth so that it, together with the arm can be adjusted along the slot.

Description

The invention relates to pliers with two pliers legs, which are connected to each other by means of a hinge pin are, the hinge pin a hinge pin head, a pivot pin base and a positive locking Area and adhere to this Cross the hinge pin on one side of the crossing area a jaw between two jaws, which are defined on the two pliers legs, is formed and on the opposite side of the first side of the intersection handle sections the pliers legs are formed, the one, to change the size of the jaws in the crossing area gradually relative to the other pliers leg adjustable pliers legs a free space with two Thigh longitudinal walls of the other pliers leg penetrated, the hinge pin in a bore of the other pliers legs guided and in his Axial direction is shiftable and two in the axial direction adjacent cross-sectional areas of the hinge pin has, one of which, positive locking Coupled area in positive engagement to the profiled flanks of one in the intersection area lying longitudinal slot of a pliers leg occurs and in the uncoupled state of the cross section the thinner area can be freely moved in the longitudinal slot with the thinner area being two diametrical opposite, symmetrically flattened Has surfaces, and wherein the narrow sides of the flattened surfaces are rounded and peripheral Support or guide zones for the hinge pin on the Bore wall of a bore of the longitudinal side walls form, with the thinner area in cross section is limited on one side by the joint pin head (see GB-A-M 10 112).

A pair of pliers is from EP 0 116 305 known, wherein the hinge pin is made of a profiled Cross-sectional area for positive engagement in correspondingly shaped flanks of a pair of pliers and from a much thinner cross-sectional area composed. At the end is that a stop collar is formed on the thinner cross-sectional area, of the actuation of the hinge pin in the axial Towards an outside of another facing him Forceps legs acted upon. Furthermore shows the GB-A-M 10 112 a pair of pliers with two pliers legs that connected to each other by means of a hinge pin are. The latter is in a hole in one, the bolt actuation side opposite leg longitudinal wall the other leg of the pliers. Furthermore is the hinge pin in its axial direction to obtain a decoupled state. The hinge pin has two adjacent cross-sectional areas, such a form-locking in the coupled state Area, the latter being circular in cross section is formed, and one in the uncoupled state enabling the shift in cross section thinner area, this thinner area being two diametrically opposed, symmetrically flattened Surfaces with on the narrow sides of the flattened Surface formed rounded. Latter form peripheral support or guide zones for the Hinge pin on the opposite side of the pin actuation side formed bore of the longitudinal leg wall the other leg of the pliers, this support of the cross-sectional area in the hole in the uncoupled Condition, d. H. in the relocated position of the Bolzens is achieved.

The object of the present invention is a generic Pliers with a view to adjusting the Forceps jaw size in every angular position of the forceps legs to improve each other.

This problem is solved by the specified in the characterizing part of claim 1 Invention.

The subclaims relate to advantageous further developments of the subject of the invention.

As a result of such a configuration is a generic one Pliers created, in which the thinner in cross section Area of the hinge pin in the coupled state the bore of each leg longitudinal wall of the other leg of the pliers interspersed with the narrow sides of the flattened Areas in coupled or uncoupled condition peripheral in each bore of the longitudinal leg walls Form support or guide zones for the hinge pin and an intermediate section in the uncoupled state of the thinner area in cross section between the positive locking area and the joint pin head free in the longitudinal slot of one leg of the pliers is movable. The support and management function of the hinge pin is the rounded narrow sides assigned, with an overall rectangular configuration. Furthermore, it is also provided that the hinge pin when actuated a stop in the area of the profiled Experiences flanks of a pliers leg. in this connection has proceeded in such a way that the freedom to enforce of the pliers legs having pliers legs one on the actuating side of the hinge pin arranged recess which, when the Hinge pin receives the hinge pin head and that an actuation stop that is sunk in depth is provided for the joint bolt head. The structural Means are simple and practical. It is particularly advantageous that the Articulated bolt head when actuated below the level of the the pliers leg side having the recess occurs. In the basic position, the pivot pin head only moves a little over the level of the side of the pliers with the recess addition, what a palpation of the joint pin head facilitated. Here are advantageous the profiled flanks of a pliers leg as Stop trained. A spring load has been found the hinge pin from the the hinge pin head opposite side as particularly advantageous with which the hinge pin after adjustment of the The jaw width is always shifted back to its basic position becomes. It is therefore always in the basic position Form fit between the hinge pin and the profiled Given flank legs. Alternatively, the arrangement can also be made in this way be that the hinge pin by means of a substantially acting perpendicular to its direction of displacement Locking part is adjustable, which is the basic position of the hinge pin is defined. A relocation the hinge pin for the purpose of changing the jaw width thus takes place against the effect of a Locking part, which in the area of the recess Pliers legs can be provided. A relocation of the hinge pin is done with willpower, the latter until fixed by the Resting part is moved back manually. advantageously, the locking part is designed as a spring-loaded ball, which in a corresponding deepening of Hinge pin engages. As a further advantageous training the hinge pin has an intermediate section between the form-producing cross-sectional area and the joint bolt head, with the intermediate section has a constant cross-section. Preferably, the cross section corresponds to the Intermediate section of the clear width between the profiled flanks of one leg of the pliers. Consequently it is ensured that the hinge pin always rotates and is tilt-proof, regardless of its axial Location. The joint pin head is circumferentially in the essentially coincident with an annular Envelope surface of the hinge pin formed, resulting in The consequence is that the hinge pin, regardless of its Operating position, secure storage in the axial bores the fork ends of the other leg of the pliers. Advantageously, that is on the actuation side of the other pliers leg arranged recess funnel-shaped, this recess in passes over the area of the axial bore. This configuration enables a favorable handling technique Moving the hinge pin in the release position to Changing the clear width of the jaws. As special It proves advantageous here, the recess eccentric to the hinge pin head, with what the recess has an ergonomically more favorable shape, which is improved handling when relocating of the hinge pin. This will be additional supported by the fact that the recess is approximately one Has thumb size. The latter can also be slightly oval and, as already mentioned, eccentric to the hinge pin be trained. This will ensure optimal rolling the bottom of the thumb when relocating the hinge pin allows. To prevent the thumb from slipping Actuation of a contaminated (e.g. oil-contaminated) Avoiding pivot pins is further provided that the hinge pin head is structured on the top is. The latter is easier to grip thanks to the measure mentioned and thus designed to be favorable in terms of handling technology. Alternatively, the pivot pin head can also as a round button part that is spherically curved upwards be trained. In an advantageous further training fills the pivot pin head in the depressed state the opening in the recess is essentially complete out. The joint pin head thus points in the projection one corresponding to the opening in the recess Diameter on. Furthermore, it is provided that the hinge pin head is formed separately, what is advantageously realized in that the Bolted bolt head screwed to the base of the pivot bolt is. It can also have a different spigot connection be provided.

According to a further embodiment, it is also provided that that the one provided in the other pliers leg Recess such a free diameter, or Articulated bolt head in relation to the free diameter the recess with such a dimension is that even when the joint pin head is depressed View gap on the profiled flanks of one Pliers legs remain. This measure proves to be for example as advantageous if dirt in the Area of the profiled flanks of the one leg of the pliers occur. The contaminants can be a complete Depressing the actuator head so practical do not hinder. You will either be in the gaps the tooth profiles, which are when the Open the pivot pin head, pushed or between the Edge of the joint bolt head and the edge of the surrounding Recess. For this purpose, it is further advantageous that the Articulated bolt head in the projection in the area of his largest diameter a tooth of the flanks of the pliers leg (only) covered to about half a tooth depth. The contact area of the joint bolt head on the upper transverse surface of the tooth profile, which the Stop when depressed for the joint pin head form is kept very small. This is beneficial with a view to pushing dirt away in the sense outlined above. It is also preferred that the pivot bolt head in its base from the overlay of a rounded and rectangular Area is formed such that the width of the rectangle about the free distance between the tooth flanks corresponds, but its longitudinal extent corresponds to the diameter of the rounded area. The section of the Hinge pin or the hinge pin head, which the rectangular area, extends only within the free area between the tooth flanks of the one leg of the pliers. The rounded or circular Surface is formed by the part of the hinge pin, which is also the overhang in terms of tooth profiling forms on the tooth flanks what just that mentioned above yields when depressed. The Narrow sides of the rectangular area are beyond preferably rounded. These narrow sides work directly with the other leg of the pliers, in which the recess is formed together. For this it is appropriate that the radius of the circumferential line the narrow sides correspond approximately to the radius of the recess. To also underflow when depressed the other leg of the pliers through the joint pin head to prevent what is tolerably unfavorable Pairings may not be completely excluded would also be preferred that a protrusion of the rectangular area over the circular area in profile- d. H. elevationally - The adjacent circular section of the Joint head surpasses. This measure will be special clearly with regard to a specific embodiment, where the circular section has its own button-like component is formed, which a has a dome-shaped curved surface. The edge area this button-shaped component exceeds called supernatant, in a side view that towers above button-like component, however, in its central area again the supernatant or both supernatants.

Fig. 1

eine erfindungsgemäße Zange in Seitenansicht;

Fig. 2

die andere Seitenansicht der Zange;

Fig. 3

den Gelenkbolzen in perspektivischer Darstellung;

Fig. 4

einen Schnitt gemäß Linie IV-IV in Fig. 1 mit in strichpunktierter Darstellung veranschaulichter Lage des Gelenkbolzens in Freigabestellung;

Fig. 5

den Schnitt gemäß Linie V-V in Fig. 4;

Fig. 6

die Rückansicht der Zange;

Fig. 7

eine Seitenansicht des Kreuzungsbereichs der Zangenschenkel zur Verdeutlichung der Blattfederzuordnung;

Fig. 8

eine Draufsicht, ausschnittsweise, auf eine weitere Ausführungsform des Gelenkbolzens;

Fig. 9

einen Schnitt durch den Gegenstand gemäß Fig. 8, geschnitten entlang der Linie IX-IX;

Fig. 10

einen weiteren Schnitt durch den Gegenstand gemäß Fig. 8, geschnitten entlang der Linie X-X, bei niedergedrücktem Gelenkbolzen;

Fig.11

eine perspektivische Darstellung, etwa entsprechend Fig. 3, des Gelenkbolzens der weiteren Ausführungsform, bei entnommenem Knopfteil;

Fig. 12

eine Teildarstellung gemäß Fig. 1 einer alternativen Ausführungsform;

Fig. 13

einen Schnitt durch den Gegenstand gemäß Fig. 12 entlang der Linie XIII-XIII;

Fig. 14

einen Schnitt durch den Gegenstand gemäß Fig. 12 entlang der Linie XIV-XIV;

Fig. 15

eine Teildarstellung gemäß Fig. 1 einer weiteren alternativen Ausführungsform;

Fig. 16

eine der Fig. 15 entsprechende Darstellung, jedoch eine weitere Ausführungsform des Gelenkbolzens und der Ausnehmung des einen Zangenschenkels betreffend;

Fig. 17

den Schnitt gemäß der Linie XVII-XVII in Fig. 16;

Fig. 18

eine weitere Teildarstellung entsprechend der Fig. 16, jedoch eine weitere Ausführungsform des Gelenkbolzenkopfes und der Ausnehmung des einen Zangenschenkels betreffend;

Fig. 19

den Schnitt gemäß der Linie XIX-XIX in Fig. 18;

Fig. 20

eine der Fig. 18 entsprechende Darstellung, jedoch eine Ausführungsform betreffend, bei der der Gelenkbolzen ohne einen Gelenkbolzenkopf ausgebildet ist;

Fig. 21

den Schnitt gemäß der Linie XXI-XXI in Fig. 20;

Fig. 22

eine Rückansicht der Zange gemäß Fig. 2, jedoch eine weitere Ausführungsform betreffend, wobei der Gelenkbolzen mittels eines Rastteiles in der Grundstellung gehalten ist;

Fig. 23

den Schnitt gemäß der Linie XXIII-XXIII in Fig. 22;

Fig. 24

eine der Fig. 23 entsprechende Darstellung, jedoch in niedergedrückter Stellung des Gelenkbolzens.

The invention is further explained below with reference to the accompanying drawings, which, however, only show exemplary embodiments. Here shows:

Fig. 1

a pair of pliers according to the invention in side view;

Fig. 2

the other side view of the pliers;

Fig. 3

the hinge pin in a perspective view;

Fig. 4

a section along line IV-IV in Figure 1 with the dash-dotted line illustrated position of the hinge pin in the release position.

Fig. 5

the section along line VV in Fig. 4;

Fig. 6

the rear view of the pliers;

Fig. 7

a side view of the intersection of the pliers legs to illustrate the leaf spring assignment;

Fig. 8

a plan view, in sections, of a further embodiment of the hinge pin;

Fig. 9

a section through the object of Figure 8, taken along the line IX-IX.

Fig. 10

8 shows a further section through the object according to FIG. 8, sectioned along the line XX, with the hinge pin depressed;

Figure 11

a perspective view, approximately corresponding to Figure 3, the hinge pin of the further embodiment, with the button part removed.

Fig. 12

a partial view of Figure 1 of an alternative embodiment.

Fig. 13

a section through the article of Figure 12 along the line XIII-XIII.

Fig. 14

a section through the object of Figure 12 along the line XIV-XIV.

Fig. 15

a partial view of Figure 1 of a further alternative embodiment.

Fig. 16

a representation corresponding to FIG. 15, but relating to a further embodiment of the hinge pin and the recess of the one pliers leg;

Fig. 17

the section along the line XVII-XVII in Fig. 16;

Fig. 18

a further partial representation corresponding to FIG 16, but relating to a further embodiment of the joint pin head and the recess of the one leg of the pliers;

Fig. 19

the section along the line XIX-XIX in Fig. 18;

Fig. 20

an illustration corresponding to FIG. 18, but relating to an embodiment in which the hinge pin is designed without a hinge pin head;

Fig. 21

the section along the line XXI-XXI in Fig. 20;

Fig. 22

a rear view of the pliers according to Figure 2, but regarding another embodiment, wherein the hinge pin is held in the basic position by means of a locking part.

Fig. 23

the section along the line XXIII-XXIII in Fig. 22;

Fig. 24

a representation corresponding to FIG. 23, but in the depressed position of the hinge pin.

The pliers 1 have two mutually intersecting Pliers legs 2 and 3. The latter are in the intersection area articulated against each other via a hinge pin 4 connected. The pliers legs 2 and 3 form on the Side above and below each a grip section 7 or 8 off. The joint of the tong M is at an angle approx 45 ° to the handle sections 7, 8. The pliers leg 2 penetrates a free space corresponding to its thickness F of the pliers leg 3. The free space F is as in the Leg swivel plane designed slot that on both sides two leg walls 9 of approximately the same thickness having. The latter are wider than that of the The handle portion.

The penetrating pliers leg 2 also points in the area of the free space F is the width of the handle section 7 clearly exceeding width. This Passage area is designated 10. He stands about at right angles to the jaw 5.

To change the size of the jaws M you can the penetrated pliers leg 3 gradually adjust. The corresponding adjustment device consists of a longitudinal slot 11 penetrated by the hinge pin 4 in the penetrating pliers leg 2. The longitudinal slot 11 is at its parallel to each other Longitudinal slot flanks 12 profiled. It is about a sawtooth-like profile. The single ones Tooth gaps are denoted by 13 and extend like the hinge pin 4, transversely to the pivot actuation plane the pliers leg 2, 3.

The in a bore 14 which is congruent to Longitudinal slot 11 lies, appropriately guided hinge pin 4 axially, it is essentially rotationally symmetrical educated. Here the hinge pin settles 4 from a cylindrically shaped joint pin head 15 and a hinge pin base 16 together, the Articulated bolt head 15 with a screw 17 the pivot pin base 16 is connected. Both parts have essentially the same diameter on. The pivot pin base 16 is diametrical opposite sides symmetrically flattened, this area a on the one hand from the joint bolt head 15 and on the other hand from a hinge pin collar 18 of the pivot pin base 16 is limited. The Thickness of the base part 16 corresponds to the area a the clear distance y of the longitudinal slot 11 between the longitudinal slot flanks 12, the length of the area a approximately the addition of the width of the Passage area 10 of the pliers leg 2 and one Leg longitudinal wall 9 of the pliers leg 3 corresponds.

Are in the area of the pivot pin base section a this on the flattened sides 19, 20 two each teeth 21 extending from the hinge pin collar 18 to form-fitting Engagement in the tooth gaps 13 of both longitudinal slot flanks 12 molded. The length of the teeth 21 corresponds to approximately three quarters of the width x of the longitudinal slot flanks 12.

The cross-sectional area a of the joint pin base thus designed 16 thus serves on the one hand to achieve the positive connection between the hinge pin 4 and the Pliers leg 2 and on the other hand when the Hinge pin 4 in direction z to secure the hinge pin 4 against self-rotation.

On the actuating side of the hinge pin 4 is in the Leg longitudinal wall 9 of the pliers leg 3 one of the Hole 14 outgoing recess 22 is arranged. This Recess 22 is realized in the form of a countersink, leaving a remaining portion of the bore 14. The recess 22 is formed with a circular shape.

The hinge pin is counter to the direction of displacement z 4 with the exception of that shown in FIGS. 22 to 24 Embodiment under spring loading, so in Sense of maintaining the positive engagement of the Profiles. For this purpose, the hinge pin 4 of the a full cross-section free end acted upon by a leaf spring 23. The latter sits on the outside of the longitudinal wall there 9. The Assignment area of the leaf spring 23 points to it recessed assignment a form-fitting channel 24 on. The leaf spring 23 takes the pliers leg 3 adapted course, the end region of the leaf spring 23 is angled in the direction of the hinge pin 4. As can be seen in FIG. 7, the free end overlaps Leaf spring 23 a sector-shaped recess 25 on the Front side of the hinge pin 4. The sector shape is taken into account the swivel angle requirement of the pliers legs 2, 3 taking into account the fact that the hinge pin 4 also in the uncoupled state the longitudinal slot 11 carrying pliers legs 2 held is. A relative movement, i. H. Rotation of the Hinge pin 4 takes place only in relation to the enforced Pliers legs 3 instead. For fixing the leaf spring 23 is a screw passing through the other end 26 or other fastener.

In a coupled position, those that remain standing circular jacket wall sections 16 'of the base part of the hinge pin 16 peripheral support or guide zones for the hinge pin 4 on the bore wall of the bore 14 of the longitudinal leg wall 9 on the right.

On the other side of the longitudinal slot 11, that is left side leg wall 9, however, is the full cylindrical jacket wall of the base part of the hinge pin 16 supported and guided on the bore wall of the Hole 14 on.

In the uncoupled position, the jacket wall takes over of the joint bolt head 15, the support and guidance within the bore 14 of the right-hand side longitudinal wall 9 and the jacket wall sections 16 'the support and guidance on the bore wall of the others Page. This ensures that the hinge pin 4th is tilt-proof in every position.

The handling of the pliers is as follows: for It is only lifting the previously used mouth width required the hinge pin 4 from the the hinge pin head 15 having side axially, d. H. transverse to the plane of movement of the pliers legs 2, 3 opposite To shift spring action. Here the joint pin head 15 received by the recess 22 and with Impact of the pivot pin head 15 on the profiled Longitudinal slot flanks 12 (the upper end face) of the longitudinal slot 11 is the positive engagement between the teeth 21 of the hinge pin 4 and the tooth gaps 13 of the longitudinal slot 11 canceled. The hinge pin 4 can now together with the displacing pliers leg 3 in the direction of extension of the longitudinal slot 11 are moved. By releasing the hinge pin head 15 causes the spring 23 to be brought about again the desired positive engagement of the profiles, the hinge pin collar 18 as a stop the longitudinal slot flanks 12 is used.

8 to 11 is another embodiment of the hinge pin illustrated. So far same parts are not explained separately, is on referred to the above statements.

The recess 22 or more precisely its smallest diameter d (more circular, as in the exemplary embodiment Training), which smallest diameter the same represents the free diameter is chosen so that when the hinge pin 4 is depressed, a viewing gap s (see also FIG. 9) on the profiled longitudinal slot flanks 12 remains. As can be seen in particular from the 8 shows, can be about below of the protruding area U of the button part 27 and the End face 28 of the longitudinal slot flank 12 located Debris pushed into the spaces 29 will be thrown out.

As can also be seen in particular from FIG. 8, covers the button part 27 in the projection in the area its largest diameter d1 a tooth of the longitudinal slot flanks 12 about half the tooth depth.

The hinge pin head 15 is in the embodiment 8 to 11 in its base from the Overlapping a rounded and a rectangular Area. The rounded area is separated by the Button part 27 formed. The overlay is wider such that the width of the rectangle roughly the free Distance y between the longitudinal slot flanks 12 corresponds, the longitudinal extent, however, the diameter d1 the button portion 27 exceeds.

In addition, the narrow sides 30, 31 of the hinge pin head 15 rounded. The rounding corresponds here the inner free rounding of the recess 22nd

The recess 22 is composed of one Cone section 32, which has an angle of inclination from 30 °, and a cylindrical portion 33 together.

As can be seen in particular from FIGS. 10 and 11 (wherein in Fig. 11 the hinge pin 4 without the button part 27), the narrow sides 30, 31 are so pulled up so that it is in the edge area in the profile, d. H. in height, the adjacent edge area 34 of button part 27, protrusion U1. The button part 27 is sunk with respect to the narrow sides 30, 31 arranged in the hinge pin 4. At the same 10 is the depressed position shown in FIG clearly that this supernatant U1 prevents about the hinge pin 15 or an edge region 34 of the button part 27 when moving under the hole 14 of the pincer leg 9 pushes.

Otherwise applies to the embodiment according to the 9 to 11 that the intermediate section Z between the cross-sectional area generating positive locking (teeth 21) and the joint bolt head 15 with a constant cross section even in the area of the button part 27 continues and at least partially towers above it, namely on the narrow sides 30 and 31.

In Fig. 12, with respect to the recess 22, which surrounds the button part 27, a modification is shown. The recess 22 is designed so that an elliptical edge line 35 results. The ellipse however, is irregular in that the focal points are generated by different sized circles and the ellipse at the bottom of a parabola is the same, but in the upper one essentially an exact one Semicircle. At the top of the ellipse that is Button part 27 concentric to a focal point or a center point of the semicircle 35a.

The boundary line 35 is further in the area of the strongest Parabolic curvature not pronounced due to penetration with an elongated hole 36 in the pliers leg Third

Overall, however, there is an ergonomic very advantageous design of the button part 27 surrounding Recess. There is also a lower tendency with regard to possibly settling dirt or similar. This recess can be advantageous by forging.

The recess 37 of the embodiment shown in FIG. 15 the pliers 1 are exactly circular, the center AM being eccentric to the center GM the hinge pin 4 is arranged. Here too results an ergonomically very advantageous design of the Recess 37, since the latter when the hinge pin is displaced 4 an optimal support for the underside of the thumb offers. It is also conceivable for the recess 37 to be elliptical (Similar to that shown in Fig. 12 Recess), the upper area of the Ellipse concentric to the center point GM of the hinge pin 4 is arranged.

The joint pin head 38 is in the in FIGS. 16 and 17 illustrated embodiment as a round, after spherically curved button part 39 formed above. How 17, in particular, also settles here the recess 22 from a cone section 32 and a cylindrical portion 33 together. Furthermore applies in this embodiment, that the joint bolt head 38 the cylindrical in the depressed state Section 33 of the recess 22 in its projection in essentially completely filled out.

18 and 19 are regarding the design of the joint bolt head 40 and the recess 22, which surrounds the hinge pin 4, a modification is shown. The recess 22 faces as in the previous exemplary embodiments a cone section 32 and a cylindrical one Section 33, but with the cone section 32 has an angle of inclination of approximately 60 °. The joint pin head 40 is structured on the top side Head part 41 formed. This structuring continues consist of several concentric and vertically offset from each other arranged circular sections together, so that a step-pyramidal surface of the head part 41 is formed. This design of the headboard 41 is used primarily for the safe handling of the Pliers 1 when changing the jaw width. a The thumb slips off if the joint pin head is dirty 40 has been successfully counteracted.

In the embodiments shown in FIGS. 15 to 19 the profiled flanks form a limit stop for the hinge pin 4 to be operated, wherein this with the underside of the joint bolt head 38 or 40 on the said longitudinal slot flanks 12 supported.

20 and 21, however, is an embodiment shown, in which the hinge pin 4 none of the has mentioned joint pin heads. Here is one Limitation of the displacement of the hinge pin 4 only by the limited indentation of the operator Given thumb. The longitudinal slot flanks also serve here 12 as limit stop, being symbolic the thumb underside of the bottom of one Hinge pin head corresponds.

Those mentioned in the previously mentioned exemplary embodiments Hinge bolts 4 are all of the hinge pin head opposite side by means of the spring 23 in Direction loaded to the home position.

The exemplary embodiments show an alternative to this 22 to 24. Here is the hinge pin 4 by means of a perpendicular to the direction of displacement of the Articulated bolt 4 acting locking part 42 fixable. This locking part 42 consists essentially of one Compression spring 43 and a locking ball 44 together.

The compression spring 43 is in that of the recess 22 opposite leg longitudinal wall 9 in a Direction towards the bore 14 open blind bore 45 stored and loaded the ball 44 towards the cylindrical end portion of the hinge pin 4. The Hinge pin 4 is in this area with a corresponding Well 46 for entry of the ball 44 in Provide basic position.

The basic position of the hinge pin 4 is thus clear Are defined. An unintentional solution to the positive locking between the teeth 21 of the hinge pin 4 and the profiled longitudinal slot flanks 12 are hereby successfully counteracted. To adjust the Pliers mouth width is the hinge pin 4 of the Axially displaced pin head 38 side, the detent ball 44 out of engagement with the Recess 46 occurs (see FIG. 24). A relocation of the hinge pin 4 in the basic position in this embodiment, manually using thumb actuation. Here, the hinge pin 4 is moved back as far until the locking part 42 fixes the hinge pin 4.

Claims (38)

1. Pliers (1) having two gripping shanks (2, 3) which are connected to one another by means of a hinge bolt (4), wherein the hinge bolt (4) possesses a hinge bolt head (15, 38, 40), a hinge bolt base part (16) and a region producing form-locking, and cross each other at this hinge bolt (4), wherein on one side of the region of intersection a gripping bit (M) is constructed between two gripping jaws which are defined on the two gripping shanks, and on the side opposite the first side of the region of intersection handle sections (7, 8) are formed on the gripping shanks (2, 3), wherein one stepwise adjustable gripping shank (2) for altering the size of the gripping bit (M) in the region of intersection relative to the other gripping shank (3) passes through an open space (F) having two longitudinal shank walls (9) in the other gripping shank (3), wherein the hinge bolt (4) is fitted in a bore (14) of the other gripping shank (3) and possesses two neighbouring cross-sectional regions in the axial direction of the hinge bolt (4) of which one region producing form-locking in the coupled state moves into form-locking engagement with the profiled flanks of a longitudinal slot (11) of one gripping shank (2) located in the region of intersection and in the uncoupled state the region of narrower cross-section is freely displaceable in the longitudinal slot (11), wherein further the narrower region possesses two symmetrically flattened surfaces positioned diametrically opposite one another, and wherein the narrow sides (30, 31) of the flattened surfaces are rounded and form peripheral support or guidance zones for the hinge bolt (4) on the bore wall of a bore (14) of the longitudinal walls (9) on the shank, wherein further the region of narrower cross-section is bounded on a side of the hinge bolt head (15, 38, 40), characterized in that the region of the hinge bolt (4) of narrower cross-section in the coupled state passes through the bore (14) of each shank longitudinal wall (9) of the other gripping shank (3), wherein the narrow sides (30, 31) of the flattened surfaces in the coupled or uncoupled state form in each bore (14) of the shank longitudinal walls (9) peripheral support or guidance zones for the hinge bolts (4) and that in the uncoupled state an intermediate section (Z) of the region of narrower cross-section between the region producing form-locking and the hinge bolt head (15, 38, 40) is freely displaceable in the longitudinal slot (11) of one gripping shank (2).
2. Pliers according to Claim 1, characterized in that the region of narrower cross-section is bounded on one side by the hinge bolt head (15, 38, 40) and on the other side by a hinge bolt collar (18) of the hinge bolt base part (16).
3. Pliers according to one of the preceding claims, characterized in that the thickness of the region of narrower cross-section matches the open width (y) of the longitudinal slot (11) between the flanks (12) of the longitudinal slot, wherein the length of the region of narrower cross-section is approximately equal to the sum of the width of the region of passage (10) of the gripping shank (2) and a shank longitudinal wall (9) of the gripping shank (3).
4. Pliers according to one of Claims 2 or 3, characterized in that formed on each of the flattened sides (19, 20) of the region of narrower cross-section are two teeth (21) emanating from the hinge bolt collar (18) for form-locking engagement into the tooth spaces (13) of both flanks (12) of the longitudinal slot.
5. Pliers according to Claim 4, characterized in that the length of the teeth (21) is approximately equal to three-quarters of the width (x) of the shank slot flanks (12).
6. Pliers according to one of the preceding claims, characterized in that in uncoupled position the jacket wall of the hinge bolt head (15, 38, 40) assumes the support and guidance inside the bore (14) of the right-hand shank longitudinal wall (9) and the jacket wall section (16') of the hinge bolt base part (16) assumes the support and guidance on the bore wall of the other side.
7. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) possesses a button part (27, 39).
8. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) is constructed as a round, upwardly spherically domed button part (27, 39).
9. Pliers according to Claim 8, characterized in that the section of narrower cross-section between the cross-sectional region producing form-locking and the hinge bolt head (15, 38, 40) continues with unchanging cross-section into the region of the button part (27, 39).
10. Pliers according to one of Claims 8 or 9, characterized in that the region of narrower cross-section projects over the button part (27, 39) on the narrow sides (30) and (31).
11. Pliers according to one of the preceding claims, characterized in that the other gripping shank (3) is constructed on one side, on the actuating side of the hinge bolt (4) with a recess (22) into which the hinge bolt head (15, 38, 40) can be received on actuation.
12. Pliers according to one of the preceding claims, characterized in that an actuating limit stop located sunk to a depth is provided for the hinge bolt head (15, 38, 40).
13. Pliers according to Claim 12, characterized in that the profiled flanks form the limit stop.
14. Pliers according to one of the preceding claims, characterized in that there is spring-loading of the hinge bolt (4) from the side located opposite the hinge bolt head (15, 38, 40).
15. Pliers according to one of the preceding claims, characterized in that the hinge bolt (4) is adjustably fixable by means of a locking part (42) acting substantially perpendicularly to its direction of displacement.
16. Pliers according to Claim 15, characterized in that the locking part (42) is a spring-loaded ball (44).
17. Pliers according to one of the preceding claims, characterized in that in terms of its circumference the hinge bolt head (15, 38, 40) is constructed substantially coinciding with a circular envelope surface of the hinge bolt (4).
18. Pliers according to one of the preceding claims, characterized in that the other gripping shank (3) is constructed on one side, on the actuating side of the hinge bolt (4) with a recess (22).
19. Pliers according to Claim 18, characterized in that the hinge bolt head (15, 38, 40) on actuation is receivable into the recess (22).
20. Pliers according to Claim 18, characterized in that the recess (22) is of funnel-shaped construction.
21. Pliers according to Claim 18, characterized in that the recess (22) is constructed eccentrically with respect to the hinge bolt head (15, 38, 40).
22. Pliers according to Claim 18, characterized in that the recess (22) is approximately thumb-sized.
23. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) is textured on the upper side.
24. Pliers according to one of Claims 18 to 22, characterized in that the hinge bolt head (15, 38, 40) in the pushed-down condition substantially completely fills the opening in the recess (22).
25. Pliers according to one of Claims 18 to 22, characterized in that a narrowest diameter of the recess (22) exceeds the diameter of the hinge bolt head (15, 38, 40).
26. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) is constructed separately.
27. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) is joined by mortise and tenon to a hinge bolt base part (16) to form the hinge bolt (4).
28. Pliers according to one of Claims 18 to 22, characterized in that the recess (22) is constructed with such an open diameter (d) and the hinge bolt head (15, 38, 40) in such a size with respect to the open diameter (d) of the recess (22) that even with the hinge bolt (4) pressed down a sighting aperture (s) onto the profiled longitudinal slot flanks (12) of one gripping shank (2) remains.
29. Pliers according to one of the preceding claims, characterized in that the hinge bolt head (15, 38, 40) in a projection in the region of its greatest diameter with respect to the longitudinal slot flanks (12) covers a tooth of the longitudinal slot flank (12) of one gripping shank (2) to approximately half the tooth depth.
30. Pliers according to one of the preceding claims, characterized in that the base surface of the hinge bolt head (15, 38, 40) is formed from the superposition of a rounded and a rectangular surface.
31. Pliers according to one of the preceding claims, characterized in that a longitudinal extension of the hinge bolt head (15, 38, 40) exceeds the diameter (dl) of the rounded surface.
32. Pliers according to one of Claims 18 to 22, characterized in that the radius of the perimeter line of the narrow sides (30, 31) is approximately equal to the radius of the recess (22) at the narrowest diameter (d) thereof.
33. Pliers according to one of the preceding claims, characterized in that an overhang (U1) of the rectangular surface over the circular surface in profile surpasses the adjoining circular section (34) of the hinge head (15).
34. Pliers according to Claim 33, characterized in that the circular section is formed by the button part (27, 39) sunk into the hinge bolt head (15, 38, 40).
35. Pliers according to one of Claims 18 to 22, characterized in that the recess (22) is constructed in such a way that an elliptical perimeter line (35) is produced, wherein the button part (27, 39) is arranged concentrically with respect to a focal point (P).
36. Pliers according to Claim 35, characterized in that the perimeter line (35) is composed of a semicircular arc (35a) and a parabola (35b), wherein the curvature at a lowest inversion point of the parabola (35b) is greater than the curvature of the semicircular arc (35a).
37. Pliers according to Claim 36, characterized in that the button part (27, 39) is arranged concentrically with the centre of the semicircular arc (35a).
38. Pliers according to Claim 36, characterized in that the perimeter line (35) of the recess (22) is not constructed in the region of greatest parabolic curvature due to penetration of the recess (22) by a slot-like longitudinal recess (36) in the gripping shank (3).

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