Pressure jaws, as well as pressure clamps with two pressure jaws

Abstract

The invention relates to a crimping tool with two jaws (2, 3) provided with opposing crimping jaws (6, 7). These jaws (6, 7) can rotate together about a rotation axis (z) directed in the direction in which they are joined. The jaws (6, 7) can also rotate about the rotation axis (z) when joined, without either jaw (2, 3) obstructing this rotation. Each jaw (6, 7) has a pivot pin (43). For greater jaw mobility, the invention proposes that the pivot pin (43) be mounted on one of the jaws (2, 3) to allow pivoting, and that the jaw (6, 7) can rotate about the pivot pin (43) in the jaws' (6, 7) mounting position.

Description

field of technology

[0001] The invention relates to a crimping tool with two jaws, which are provided with opposing crimping jaws, wherein the crimping jaws are rotatable together about a rotational axis directed in the direction of the crimping jaws coming together, wherein furthermore the crimping jaws are rotatable about the rotational axis even in the closed state without hindrance by a jaw and one crimping jaw has a pivot pin wherein the pivot pin is mounted in one of the jaws for pivoting. State of the art

[0002] Crimping pliers of the type in question are known. They are used, for example, for crimping conductor ends, e.g., using a wire end ferrule. The crimping jaws used for this purpose are interlocking shaped parts, possibly with ribs. Known crimping pliers have jaws to which crimping jaws are attached. The jaws can be opened and closed in a pliers-like or scissor-like manner.

[0003] In a crimping tool known from DE 198 18 482 C1 (US 6151950 A), the crimping jaws held in the jaws of the tool can only be moved together with the jaws of the tool.

[0004] In a crimping tool known from EP 0 516 598 A1, the crimping jaws are rotatable relative to the jaws of the tool. The crimping jaws have a pivot pin which is received in a plastic insert, which is pivotable relative to the jaws of the tool by means of stub axles received in the jaws of the tool. The pivot pins are non-rotatably connected to the crimping jaws. Document EP 0 888 850 A2 also discloses a crimping tool according to the preamble of independent claim 1.

[0005] From EP 3 179 580 A1, a crimping tool is known in which the crimping jaws are rotatable about an axis perpendicular to the direction in which the crimping jaws are closed. From US 3 067 489 A, crimping jaws are known that have a pin extension. From US 4 283 933 A, a crimping tool is known in which the crimping jaws are rotatable about an axis perpendicular to the direction in which they are closed. From US 6 151 950 A, a crimping tool comparable to US 4 283 933 A is known. From US 5 117 671 A, a device for acting on electrical wires is known in which star-shaped acting pins are linearly movable towards a center point. The linkages acting on the pins are rotatably articulated to a circumferential part, which is rotatable relative to a guide part of the pins, and to the pins themselves. Summary of the invention

[0006] Starting from a prior art such as that known from EP 0 516 598 A1, the invention deals with the problem of providing a crimping tool of the type mentioned in which the crimping jaws are advantageously designed to be movable.

[0007] This problem is solved in the subject matter of claim 1, wherein the focus is on the fact that the press jaw can be rotated about the pivot pin in a mounted position of the press jaw.

[0008] The proposed rotation about the axis of rotation can be continuous, but alternatively it can also be stepwise, e.g. in the circumferential direction in 15°, 30° or 45° steps.

[0009] The pivot pin can be mounted in the press jaw in a removable manner. The press jaw can be rotatable about a geometric axis of rotation passing through the pivot pin. Accordingly, the pivot pin can provide the geometric axis of rotation.

[0010] The pivot pin can be mounted in the associated jaw of the plier in a pivot joint for pivoting about a pivot axis extending transversely to the axis of rotation. When the pressing jaw is detached from the opposite jaw, the pressing jaws can be rotated individually or together in the direction of the pivot axis to be pulled out of the jaw opening. By detaching one pressing jaw from the associated jaw or from the associated pivot pin, the upper surface of the jaw facing the pressing jaw can be separated from the pressing jaw by shifting that pressing jaw towards the other jaw. This creates a space between the detached pressing jaw and the upper surface of the jaw facing the pressing jaw, which can be used to pivot the pair of pressing jaws about the pivot axis, particularly in a direction that moves the pair of pressing jaws out of the jaw opening.After releasing the other press jaw from its corresponding pivot pin, the pair of press jaws can essentially be pulled out along the axis of rotation. This allows for a press jaw change in a user-friendly manner.

[0011] Even in their closed position, the press jaws have no protrusion that would collide with the upper and / or lower jaws during rotation. Where guide projections are provided, this is also achieved by distributing the guiding functions of these projections between the corresponding jaws on the opposite side of the press jaw, i.e., between both jaws. In this case, the guide projections are also designed to engage only to the extent necessary to prevent any collision with the jaws when the press jaw rotates around the aforementioned axis of rotation.

[0012] For example, to replace the pressing jaw, such as after wear of the pressing jaw or to install a differently designed pressing jaw adapted to the pressing part, the pressing jaw can be removed from the pivot pin. This can be done without tools, but also, if necessary, with the use of a common tool such as pliers or a screwdriver.

[0013] The pivot pin can be held in place by a plug-in component that is positively engaged with both the pivot pin and the press jaw. To remove the press jaw from the pivot pin, the plug-in component must be removed, thereby releasing the positive engagement.

[0014] The plug-in part can be approximately U-shaped overall, comprising two, preferably, substantially parallel U-shaped legs connected to each other by a U-shaped web. The positive locking can be achieved in the area of ​​the U-shaped legs and / or the U-shaped web.

[0015] The plug-in part can also be spring-loaded, e.g., due to the plug-in part being designed as a wire-shaped spring, in particular a U-shaped wire-shaped spring.

[0016] Furthermore, the formation of a rotary axis and / or a pivot axis, as described above, is also conceivable for press jaws that do not have guide elements or guide elements designed differently.

[0017] The press jaws can have ribs running in a longitudinal direction, which interlock during pressing.

[0018] Outside the working area of ​​the ribs, a guide surface extending transversely to the rib's longitudinal direction can be formed, which interacts with a guide projection extending from the opposite press jaw. This design ensures guidance of the press jaws, particularly during the pressing process and the associated engagement of the jaws. Any forces acting on one or both press jaws in the longitudinal direction of the ribs during pressing, which could cause one press jaw to shift relative to the other in the rib's longitudinal direction, are absorbed by the interaction of the guide surface of one press jaw and the guide projection of the other. This results in proper pressing or crimping. The guide surface can be located on a guide projection of the other press jaw.However, it can also be located on a different shape of the other press jaw. For example, the guide surface can also be located on an associated (end) area of ​​one or more ribs of the other press jaw.

[0019] In a preferred embodiment, the guide projection of one press jaw extends beyond a separating plane of the press jaws directed transversely to the direction of contact of the press jaws, preferably to contact the guide surface of the other press jaw.

[0020] As mentioned in general, the guide surface can be formed, for example, by a ribbed end face that limits the ribs (of the other press jaw) in their longitudinal extension.

[0021] The ribs have a longitudinal rib direction, with each rib having a free end face corresponding to the other press jaw.

[0022] The end face, viewed in a cross-section perpendicular to the rib longitudinal direction, can have a contour line that is rounded most prominently in the middle.

[0023] The proposed cross-sectional design, preferably of each rib in the end-face area, results in improved crimping, e.g., of wire ferrules. All ribs of one or both crimping jaws can have the rounded contour line.

[0024] The furthest projecting area of ​​the end face, which points towards the opposite press jaw or its groove base between two ribs leaving a groove between them, is preferably substantially rounded, optionally having a constant radius along the entire length of the rounded contour line, but also optionally having different radii along the rounded contour line. Preferably, at least a portion of the end face contour is provided with a radius that is smaller than the thickness of a rib perpendicular to its longitudinal extent, for example, corresponding to 0.5 to 0.3 times the thickness.

[0025] This design results in a crimping tool that is particularly improved with regard to handling. The pair of crimping jaws can be rotated around the axis of rotation into a position favorable for crimping or pressing. The crimping jaws are designed such that this rotation of the pair is preferably possible in any retracted position, including the fully retracted position.

[0026] The aforementioned design to enable the pair of press jaws to be rotated even when closed also applies to a pair of press jaws with a guide surface running transversely to the longitudinal direction of the ribs outside a working area of ​​the ribs, which interacts with a guide projection extending from the opposite press jaw.

[0027] Furthermore, at least one press jaw can have a rib-side end face, wherein, seen in a cross-section transverse to the rib longitudinal direction, a contour line is given that projects furthest in the middle.

[0028] Regarding the design of the press jaws, it may further be provided that the ridge lines of at least one set of ribs in the aforementioned view have a protrusion that projects into the press jaw opening.

[0029] This preferably results in a ridge line that, instead of being strictly straight, has a convex protrusion towards the press jaw opening. This protrusion can, preferably, be partial with respect to the longitudinal extent of the ridge line, meaning it may only extend over a portion of the line.

[0030] As a result of such a design, a cross-sectional shape may arise that deviates from an otherwise possibly strictly rectangular geometric cross-sectional shape of the press jaw opening.

[0031] Using press jaws with a protrusion formed with respect to the ridge lines described above, the press jaws can first be brought into contact with the outer surface of the wire end sleeve with the protrusions formed on the ribs, and with the help of the protrusions, concave wall sections can be formed in the essentially rectangular wall of the deformed wire end sleeve during further pressing.

[0032] Consequently, the workpiece or the wire end ferrule undergoes a favorable deformation. In particular, this allows for almost complete filling of the cross-section of the crimped wire end ferrule with wire ends, perpendicular to the longitudinal extent of the conductor ends. The proposed crimping method preferably avoids cavities that could allow the conductor ends to shift even after crimping and thus potentially lead to loosening. The free inner cross-section of the deformed wire end ferrule is preferably completely, almost homogeneously, filled with conductor ends. This also ensures a uniform arrangement of the conductor ends within the wire end ferrule.

[0033] During the crimping process, the protrusions first reach the outer surface of the wire end ferrule, thus initially pressing against it. Consequently, concave wall sections of the wire end ferrule are formed in the area of ​​this contact by the protrusions.

[0034] The centrally projecting, rounded contour line of the rib-pen end face can be continuously curved, possibly with the exception of a flattening that forms the furthest projecting area. This flattening preferably appears as a straight line relative to the contour line, transitioning into the continuously curved contour line. Preferably, the straight line transitions into a continuously curved path on both sides.

[0035] The curvature can also extend to the point where it merges into a flank contour of the rib that runs in a straight line in the direction of travel. In one possible, and also preferred, embodiment, the rib can, with reference to the cross-section described above, have only two possibly parallel contour lines and the curvature described above on the end face, and optionally a flattening that forms the furthest projecting area. Preferably, the curved (partial) contour line transitions tangentially into the surface contour.

[0036] The press jaws described here are preferably made of a metallic material, e.g., steel. They can be multi-part or single-piece. They can be manufactured by forming, e.g., hot forming, or by primary forming, e.g., as a casting, particularly in investment casting. A sintering process can also be used.

[0037] A jaw of the pliers can also have an upper surface facing the associated pressing jaw, wherein a guide projection, when the pressing jaws are closed, maintains a distance between its surface facing the closing direction and the surface of the jaw facing the pliers, preferably even when the pressing jaws are fully closed. Regardless of the rotational position of the pair of pressing jaws about the axis of rotation, a collision-free displacement of the guide projection towards the upper surface of the jaw facing the pliers is enabled. Preferably, even when the jaws are fully closed, the guide projection does not extend beyond the opposite pressing jaw.

[0038] In the case of possible press jaws whose ribs have protrusions extending beyond the ridge line towards the press jaw opening, these protrusions can, when viewed from one side of the ribs, overlap with each other in relation to a set of ribs.

[0039] In one possible embodiment, only individual rib sets can have such protrusions, for example, both rib sets of one press jaw, while the rib sets of the other press jaw do not have such protrusions. Alternatively, one rib set of each press jaw can be provided with such a protrusion. In a further embodiment, all rib sets, corresponding to all ribs of both press jaws, are provided with such protrusions.

[0040] According to one possible design, the ridge lines can run continuously, i.e., in a straight line from one end of the ridge line to the other in the longitudinal direction. Alternatively, such a ridge line can have at least one straight section, to which, for example, a bulge is attached.

[0041] Furthermore, straight sections of the ridge line, with different or the same lengths, can also be provided on both sides of the protrusion, in relation to the longitudinal direction of the ridge line.

[0042] These straight areas, which may be provided on both sides of the protrusion, can merge into one another in a linear extension, so that in a possible, and also preferred, embodiment these straight areas run along a geometric baseline stretched between the two endpoints of the ridge line.

[0043] The greatest extent of the protrusion beyond such an imaginary baseline in the direction of the press jaw opening can correspond to one fiftieth to one tenth of the greatest extent of the baseline that occurs when the press jaw opening is initially closed.

[0044] The initially closed press jaw opening is reached in the press jaw displacement position, in which the interlocking ribs of the press jaws moving towards each other with their ridge lines completely enclose the press jaw opening in its largest cross-sectional design.

[0045] In a preferred embodiment, the protrusions of the ribs are effective in every press jaw opening position, and are correspondingly preferentially effective when crimping a wide variety of wire end sleeve cross-sections.

[0046] The length of the protrusion measured in the direction of extension of the baseline can also correspond to one third to one tenth of the greatest extent of the baseline when the press jaw opening is initially closed.

[0047] The ridge line can be formed in the area of ​​the protrusion as a circular segment with a continuous radius, or possibly with a radius that changes in the direction of extension.

[0048] In one possible embodiment, a highest point of the protrusion results, which is offset from the longitudinal center of the rib relative to the maximum initial extension of the imaginary baseline when the press jaw opening is initially closed. This offset can extend to a completely off-center arrangement of the entire protrusion, for example, when crimping wire ferrules with a relatively large cross-section, e.g., 16 mm². When crimping wire ferrules with a smaller cross-section, e.g., 6 mm² or 2.5 mm², the protrusion may, at the moment of crimping, be arranged with the longitudinal center intersected by the effective ridge line.

[0049] The offset is preferably directed towards the baseline of the next rib of the same press jaw, which is substantially perpendicular to the baseline of the first rib in a parallel arrangement. The longitudinal center here refers to a midpoint between the points that define the end of the ridge line when the press jaw opening is initially closed, corresponding to the imaginary baseline.

[0050] This results in a concavity that is asymmetrically formed with respect to a baseline perpendicular to an otherwise linear ridge. The concave wall sections of the crimped wire end ferrule are formed accordingly, particularly in larger diameter cross-sections, such as 16 mm² or 8 mm², with respect to a wall leg considered in cross-section, tending to be associated with the corner area of ​​the otherwise essentially rectangular wall, while the wall section corresponding to the opposite corner area is preferably straight. In smaller cross-sections, a wall leg may even be formed with a concave wall section flanked on both sides by straight wall sections of at least approximately equal length. In the smallest cross-sections, e.g.,With cross-sections smaller than 2.5 mm², the effect can even occur that essentially only a concave wall section forms, connecting the corner areas of the otherwise essentially right-angled wall. At these small cross-sections, it can happen that the pressing contour is not completely filled on both sides of the protrusion during the grouting process, and consequently, straight wall sections are not formed.

[0051] The ranges or value ranges or multiple ranges specified above and below also include, with regard to disclosure, all intermediate values, particularly in one-tenth increments of the respective dimension, and possibly even dimensionless values. For example, the specification "one fiftieth to one twentieth" also includes the disclosure of ten five-hundredths to nine two-hundredths, eleven five-hundredths to ten two-hundredths, eleven five-hundredths to nine two-hundredths, etc. This disclosure can serve, on the one hand, to delimit a specified range boundary from below and / or above, or alternatively or additionally, to disclose one or more singular values ​​from a given specified range.

[0052] In the case of possible press jaws whose ribs have protrusions extending beyond the ridge line towards the press jaw opening, these protrusions can, when viewed from one side of the ribs, overlap with each other in relation to a set of ribs.

[0053] In one possible embodiment, only individual rib sets can have such protrusions, for example, both rib sets of one press jaw, while the rib sets of the other press jaw do not have such protrusions. Alternatively, one rib set of each press jaw can be provided with such a protrusion. In a further embodiment, all rib sets, corresponding to all ribs of both press jaws, are provided with such protrusions.

[0054] According to one possible design, the ridge lines can run continuously, i.e., in a straight line from one end of the ridge line to the other end in the longitudinal direction. Alternatively, such a ridge line can have at least one straight section, to which, for example, a bulge is attached.

[0055] Furthermore, straight sections of the ridge line, with different or the same lengths, can also be provided on both sides of the protrusion, in relation to the longitudinal direction of the ridge line.

[0056] These straight areas, which may be provided on both sides of the protrusion, can merge into one another in a linear extension, so that in a possible, and also preferred, embodiment these straight areas run along a geometric baseline stretched between the two endpoints of the ridge line.

[0057] The greatest extent of the protrusion beyond such an imaginary baseline in the direction of the press jaw opening can correspond to one fiftieth to one tenth of the greatest extent of the baseline that occurs when the press jaw opening is initially closed.

[0058] The initially closed press jaw opening is reached in the press jaw displacement position, in which the interlocking ribs of the press jaws moving towards each other with their ridge lines completely enclose the press jaw opening in its largest cross-sectional design.

[0059] In a preferred embodiment, the protrusions of the ribs are effective in every press jaw opening position, and are correspondingly preferentially effective when crimping a wide variety of wire end sleeve cross-sections.

[0060] The length of the protrusion measured in the direction of extension of the baseline can also correspond to one third to one tenth of the greatest extent of the baseline when the press jaw opening is initially closed.

[0061] The ridge line can be formed in the area of ​​the protrusion as a circular segment with a continuous radius, or possibly with a radius that changes in the direction of extension.

[0062] In one possible embodiment, a highest point of the protrusion results, which, relative to the maximum extent of the imaginary baseline when the press jaw opening is initially closed, is offset from the longitudinal center of the rib. This offset can extend to a completely off-center arrangement of the entire protrusion, as is the case, for example, when crimping wire ferrules with a relatively large cross-section, e.g., 16 mm². When crimping wire ferrules with a smaller cross-section, e.g., 6 mm² or 2.5 mm², the protrusion may, at the moment of crimping, be arranged with the longitudinal center intersected by the effective ridge line.

[0063] The offset is preferably directed towards the baseline of the next rib of the same press jaw, which is substantially perpendicular to the baseline of the first rib in a parallel arrangement. The longitudinal center here refers to a midpoint between the points that define the end of the ridge line when the press jaw opening is initially closed, corresponding to the imaginary baseline. Brief description of the drawings

[0064] The invention is explained below with reference to the accompanying drawing, which, however, only depicts exemplary embodiments. A part that is explained only in relation to one of the exemplary embodiments and is not replaced by another part in a further exemplary embodiment due to the special feature highlighted therein, is thus also described for this further exemplary embodiment as a possible existing part. The drawing shows: Fig. 1 in perspective view of a crimping jaw in an open position; Fig. 2 the side view thereof; Fig. 3 the crimping jaw in top view; Fig. 4 an enlarged front view towards the crimping jaw; Fig. 5 the magnification of area V in Fig. 1 ; Fig. 6 a sectional view according to the section plane VI in Fig. 5 ; Fig. 7 the magnification of area VII in Fig. 6 ; Fig. 8 in perspective detail view of the press jaw arrangement, concerning the press jaw open position; Fig. 9 a further perspective view of the press jaw arrangement, viewed in the direction of arrow IX in Fig. 8 ; Fig. 10 one of the Fig. 9 corresponding representation, but after removing the plug-in parts that secure the pressing jaws to the pressing tool; Fig. 11 the pressing jaws with associated pivot pins and plug-in parts in a perspective exploded view; Fig. 12 the section along line XII - XII in Fig. 4through the press jaw arrangement; Fig. 13 one of the Fig. 12 corresponding representation, however, in the course of a joint rotation of the press jaw pair; Fig. 14 in a single view a pivot pin designed to hold a press jaw; Fig. 15 another view of the pivot pin; Fig. 16 the pivot pin in perspective view; Fig. 17 essentially the Fig. 9 corresponding representation, however, after releasing the holder of a press jaw on the associated pivot pin and pivoting the pair of press jaws into a removal position; Fig. 18 the section along line XVIII - XVIII in Fig. 3 ; Fig. 19 a sectional view according to section plane XIX in Fig. 8 with the workpiece inserted in the press jaw, concerning a press jaw open position; Fig. 20 the view according to arrow XX in Fig. 19 ; Fig. 21 one of the Fig. 18corresponding representation, concerning an intermediate position during a grouting process; Fig. 22 one of the Fig. 19 corresponding representation, concerning the intermediate press position according to Fig. 21 ; Fig. 23 the view according to arrow XXIII in Fig. 22 ; Fig. 24 a subsequent illustration to Fig. 22 in the course of a further press jaw relocation; Fig. 25 the view according to arrow XXV in Fig. 24 with a further magnifying-magnification view; Fig. 26 a subsequent view to Fig. 21 , concerning an intermediate position under a first bending deflection of a retaining part acting on a press jaw; Fig. 27 the retaining part in a detail view; Fig. 28 a subsequent view to Fig. 26 during the further pressing process, with further resilient deflection of the mounting part; Fig. 29 a side view according to Fig. 4 , concerning a second embodiment of the press jaws; Fig. 30 the pair of press jaws of the embodiment according to Fig. 29in perspective view; Fig. 31 in schematic and enlarged view the press jaw opening limited by the ribs of the press jaws of the second embodiment; Fig. 31 the magnification of area XXXIa in Fig. 31 ; Fig. 32 one of the Fig. 29 corresponding illustration with the workpiece placed in the press jaw opening for pressing; Fig. 33 a subsequent position to Fig. 32 during a grouting process; Fig. 34 a subsequent illustration to Fig. 33 , concerning the crimping end position; Fig. 35 in detail shows a crimping jaw pair of the second embodiment according to Fig. 29 crimped workpiece in the form of a wire end sleeve that receives conductor ends. Description of the embodiments

[0065] The presentation and description initially refers to Fig. 1, a crimping tool 1, which essentially has two crimping jaws 2, 3, two handle parts 4, 5, as well as a first crimping jaw 6 and a second crimping jaw 7, which are arranged opposite each other as a pair of crimping jaw corners.

[0066] The Figures 1 to 28 Figure 1 shows a crimping tool 1 with crimping jaws 6 and 7 in a first embodiment. A second embodiment of the crimping jaws 6 and 7 is shown in the Figures 29 to 35 depicted.

[0067] The jaw 2 and the associated handle 4 are hereinafter referred to as fixed, while the jaw 3 and the handle 5 associated with it are hereinafter referred to as movable.

[0068] The first pressing jaw 6 is assigned to the fixed jaw 2, while the movable jaw 3 carries the second pressing jaw 7.

[0069] The fixed jaw 2 of the pliers essentially consists of two jaw parts 8 of essentially identical design, spaced apart from each other transversely to the longitudinal extent of the jaw 2, which at their ends, in the areas facing away from the pressing jaws 6 and 7, transition into the handle part 4, which is rigidly connected to the jaw 2 thus designed. The latter, like the movable handle part 5, can be enclosed by a handle cover 9 or 10.

[0070] The movable jaw 3 is rotatably mounted about a geometric axis of rotation x on the stationary jaw 2, wherein a rotational open position is limited by a stop section 11 of the movable jaw 3 being supported on a section of the stationary jaw 2, e.g., as shown, on a pin 12 extending between the jaw parts 8 of the stationary jaw 2 in the direction of extension of the axis of rotation x.

[0071] The axis of rotation x runs essentially transversely to the longitudinal direction of, in particular, the stationary jaw 2 of the pliers and the adjoining handle part 4.

[0072] Furthermore, the movable jaw 3 of the plier is spring-loaded in the direction of its stop-limited open position. For this purpose, in the illustrated embodiment, a spring 13, preferably in the form of a cylindrical tension spring as shown, is provided, which acts on one of the lever ends of the movable jaw 3 that faces away from the associated second pressing jaw 7. The end of the spring 13 facing away from the jaw 3 is connected to a further pin 14 of the stationary jaw 2.

[0073] Essentially starting from the geometric axis of rotation x, lever sections extend away from each other, such as a lever section projecting essentially towards the handle part 5, at the end of which the spring 13 acts, and a lever section facing essentially away from the handle part 5 and directed towards an end face of the press jaw 2, at the end of which the associated second press jaw 7 is held.

[0074] Overall, the movable jaw 3 of the illustrated embodiment is preferably formed by a continuous, plate-like lever part 15 made of a single material.

[0075] Furthermore, the movable handle part 5 is essentially hinged at the end of the lever section 17 acted upon by the spring 13. The corresponding geometric axis of rotation y extends in a parallel orientation to the geometric axis of rotation x of the movable jaw of the pliers 3. In conjunction with a ratchet arm 18, this results in a toggle joint arrangement K concerning the hinge of the handle part 5 and the action via the handle part 5 on the jaw of the pliers 3.

[0076] For this purpose, the ratchet arm 18 is hinged at one end to the fixed jaw 2 and at the other end to the movable handle 5. The relevant geometric axes of rotation also run parallel to the geometric axis of rotation x, as well as to the geometric axis of rotation y.

[0077] A toothed ratchet section 19 is formed on the ratchet arm 18, for interaction when the crimping pliers 1 are actuated with a pawl 20 pivotally mounted on the movable handle part 5. The latter is spring-loaded into a basic position by means of a tension spring 21 in the movable handle part 5.

[0078] In a known manner, adjustment of the knee joint assembly K is made possible by an adjusting element 22, accessible from the outside on the fixed jaw 2 and rotatable about the geometric axis of rotation about which the ratchet arm 18 is also movable in the area of ​​the fixed jaw 2. The adjusting element 22 can be locked in several rotational positions. It acts via an eccentric (not shown) on the fixed-jaw axis of rotation of the ratchet arm 18, thus enabling a corresponding linear displacement of the relevant geometric axis of rotation.

[0079] The first pressing jaw 6 is attached to the end of a spring-loaded retaining part 23. With respect to the center line a of the retaining part 23, which runs essentially longitudinally along the fixed jaw 2 and its extension into the fixed handle 4, the following shape, viewed from the movable jaw 3 or the movable handle 5, is essentially concave, particularly in the area of ​​a retaining part section 24 between the free end holding the first pressing jaw 6 and a stop connection 25, which will be described in more detail below.

[0080] The mounting part 23 is preferably flanked on both sides by the jaw parts 8 of the stationary plier jaw 2, wherein the mounting part section 26 facing away from the end carrying the first pressing jaw 6 is connected at its end to the stationary plier jaw 2, correspondingly to the jaw parts 8, and / or the stationary handle part 4. In the illustrated version, a fixed connection 27 is provided in this respect by two pin connections spaced apart from each other in the direction of extension of the center line a.

[0081] The pressing jaws 6, 7 are designed for opposing arrangement in the pressing tool 1. One or both pressing jaws 6, 7 have ribs 29, 31. The ribs 29, 31 have a longitudinal rib direction R corresponding to the direction of their free ends when projected onto a base surface, cf. e.g. Fig. 11 During pressing, the ribs 29, 31 can usually be pressed over part of their height H, see also. Fig. 11, collide. Reference is also made to the following: Figures 6, 7 The area of ​​the ribs 29, 31, which typically engages with a pressed part during pressing, is designated as the working area. Outside the working area of ​​the ribs 29, 31, the ribs 29, 31 have a guide surface F that interacts with a guide projection 38 extending from the opposite press jaw 6, 7. This results in an interaction and thus also in resistance to or limitation of displacement in the longitudinal direction of the ribs. Additionally or alternatively, the guide surface can also be provided in the transverse direction. In the illustrated embodiment, this is achieved by a corresponding end face S of a guide projection 38 pointing in this direction, possibly opposite each other on both sides; see also, for example, [reference to be added]. Fig. 5The guide surface, if present in the transverse direction, serves less to limit displacement than to provide additional guidance in the form of linear guidance of the press jaws relative to each other. Such displacement limitation is preferably already achieved by the interlocking ribs.

[0082] The press jaws 6 and 7 are preferably identical in design, more preferably comprising a base body 28 on which the ribs 29 are arranged, initially with reference to the press jaw 6. The ribs 29 and the base body 28 are preferably formed in one piece from a single material.

[0083] The ribs 29 of the press jaw 6 have the longitudinal rib direction R. With reference to a viewing direction perpendicular to this longitudinal rib direction R, the ribs 29 are essentially triangular in plan view, with an outer rib end face 30 extending essentially perpendicular to the base body 28 or perpendicular to the longitudinal rib direction R. Starting from this rib end face 30, the end face extending in the longitudinal rib direction R and facing the opposite press jaw slopes down towards the base body 28.

[0084] The ribs of a press jaw 6 or 7, oriented in the same direction, are spaced apart from each other transversely to the rib longitudinal direction R, in particular with a distance that essentially corresponds to the rib thickness considered in the distance direction.

[0085] Further ribs of the same press jaw 6 or 7 partially extend into these spaces between the jaws. With reference to an end view of the press jaw 6, in which the triangular plan view of a rib 29 is shown, the further ribs 29 engaging in the spaces between the aforementioned ribs 29 are arranged essentially as mirror images, but preferably offset by one rib width. These further ribs also have an outer rib end face 30 extending essentially vertically to the base body 28, opposite the rib end faces 30 of the aforementioned ribs 29. These further ribs 29 also slope downwards in the longitudinal direction towards the base body 28. Ribs 29 of the press jaw 6 oriented in the same direction form a set of ribs 54 or 55 (see Figure 54). Fig. 8 ).

[0086] The opposite press jaw 7 is designed identically with regard to the design and arrangement of the ribs, accordingly having triangular ribs 31 with outer rib end faces 32 in relation to a ground plan viewed from the front.

[0087] The ribs 29 and 31 of the press jaws 6 and 7 interlock in a comb-like manner, whereby the triangular ground plan design of the ribs 29 and 31 described above, as well as the mirror-image arrangement within a press jaw 6 and 7, results in a configuration independent of the spacing between the press jaws 6 and 7, as e.g. in Fig. 1 As can be seen, the press jaw opening 33 is set with a preferably rectangular, more preferably square, ground plan. The edge length of the press jaw opening 33 can be changed uniformly by changing the linear spacing between the press jaws 6 and 7.

[0088] Facing the other press jaw, each rib 29, 31 has a free end face 34, with a cross-section as shown in the illustration in Fig. 7 The contour line 35, which projects most prominently in the center and extends transversely to the longitudinal direction of the ribs, is rounded. This rounded or curved contour line 35 extends between the flank contour 36 of the rib 29, 31, which preferably extends in a straight line with respect to a direction of contact r of the press jaws 6 and 7. Furthermore, a parallel flank contour 36 is preferably provided on both sides of a rib 29, 31. Viewed in the direction of the opposite press jaw, the contour line 35 is preferably concave overall.

[0089] The curved contour line 35 can extend continuously over the entire rib thickness viewed transversely along the rib's longitudinal direction, for example having a (constant) radius of curvature that can correspond to half the rib thickness.

[0090] As further shown, the continuous curvature of the contour line 35 may be interrupted by a flattening 37, which forms the furthest projecting area of ​​the rib 29, 31 and is approximately central to the cross-section. This flattening may run transversely and possibly in a straight line to the flank contour 36 with respect to the cross-section.

[0091] With respect to a view perpendicular to the direction of contact r of the press jaws 6 and 7, a ridge line 56 is visible along the end face 34, respectively, when viewed from the rib end face 30 or 32. This ridge line 56 is shown in the Figures 1 to 28 The first embodiment shown is preferably continuously straight (see above). Fig. 4 ).

[0092] Transverse to the longitudinal direction of the ribs, when the press jaws 1 are actuated, particularly during a pressing operation, the ribs 29 and 31 can be supported and thus the press jaws 6 and 7 guided.

[0093] Furthermore, a guide is provided, particularly in the longitudinal direction of the ribs. For this purpose, each press jaw 6, 7, connected to the respective base body, has at least one guide projection 38 with a length, considered in the direction of travel r, which can essentially correspond to the length of the ribs 29 or 31 arranged on the same base body 28 in the same direction. Transversely to the longitudinal direction of the ribs, the guide projection 38 extends over a distance which, in the illustrated embodiment, covers the arrangement of two or three ribs 29, 31.

[0094] The guide projection 38 extends further along the associated rib end face 30 or 32.

[0095] In the operating position of the press jaws 6 and 7, in which the ribs 29 and 31 interlock, the guide projection 38 works together with the rib end faces 30 and 32, respectively, which form a guide surface.

[0096] Such support via a guide projection 38 is provided opposite each other when viewed in the longitudinal direction of the ribs, wherein the opposing guide projections 38 are provided twice on one side, leaving an intermediate central entry opening 39, and preferably only once on the opposite side, for entry into the central entry opening of the other press jaw 6, 7.

[0097] This also provides additional guidance due to the arrangement of the mutually oriented longitudinal edge surfaces of the comb-like cooperating guide projections 38 of both press jaws.

[0098] In order to further improve the crimping tool 1, particularly in terms of handling, the crimping jaws 6 and 7 are rotatable together about a rotation axis z in the operating position held between the fixed jaw 2 and the movable jaw 3, which is directed in the direction of travel r and transversely to the geometric axes of rotation x and y of the movable jaw 3 and the movable handle part 5, respectively.

[0099] This possible twisting is independent of the contact position of the press jaws 6 and 7, i.e., both in the press jaw's basic position, e.g., as shown in the illustration in Fig. 2 , as also in a crimping jaw end position, e.g. according to the illustration in Fig. 28 , as well as in any intermediate position between the basic position and the final position.

[0100] This rotatability about the axis of rotation z, even in a retracted position in which the press jaws 6 and 7 are fully engaged (which is theoretically only possible if no workpiece to be pressed is located in the press jaw opening 33), is essentially achieved by ensuring that the surface 40 of a guide projection of the press jaw located on the opposite jaw, facing the opposite jaw, does not extend beyond a lower surface 41 of the base body 28 of the opposite jaw in this retracted position. Accordingly, a gap always exists between the surface 40 of the guide projection 38 and the surface 42 of the jaw towards which the guide projection 38 moves.

[0101] To achieve rotatability, a pivot pin 43 is provided for each of the pressing jaws 6 and 7, respectively. This pivot pin, penetrating the underside 41, is seated in a form-fitting recess 44 in the base body 28 of the pressing jaw 6, 7. The pressing jaw 6, 7 is rotatable relative to the pivot pin 43 about the axis of rotation z, while the pivot pin 43 is preferably fixed with respect to the axis of rotation z in the respective end of the pliers jaw 2, 3 or the lever part 15 or the mounting part 23.

[0102] The press jaw 6 or 7 can be detachably mounted on the respective pivot pin 43. In the illustrated embodiment, a U-shaped plug-in part 45 is provided for this purpose, which can be removed, if necessary, from the end face that also forms the press jaw opening 33, transversely to the axis of rotation z. For this purpose, two channels 46 running parallel and transversely to the axis of rotation z are provided in the base body 28 of the press jaw 6, 7, through which the U-shaped legs of the plug-in part 45, which preferably run parallel to each other in the unloaded state, can be inserted. The channels 46 cross the recess 44, which essentially receives the pivot pin 43 (see figure). Fig. 11 ).

[0103] The pivot pin 43 can be provided with a polygonal cross-section, at least in the section interacting with the plug-in part 45, in the illustrated embodiment in the form of an octagon. The U-shaped legs of the plug-in part 45 abut against two flat sides of the polygonal pivot pin 43 opposite each other with respect to the axis of rotation z. This provides a positive-locking connection of the plug-in part 45 both in the press jaw 6, 7 and on the pivot pin 43, since the polygonal design described above is formed particularly in a diameter-constricted area of ​​the pivot pin 43, so that the U-shaped legs lie in the circumferential annular groove formed thereby (see also Fig. 6 ). Accordingly, a rotational detent can be provided in several rotational positions.

[0104] By pulling out the plug-in part 45, which in a further embodiment is preferably spring-loaded, the press jaw 6, 7 can be detached from the pivot pin 43, in order to remove the press jaw 6, 7.

[0105] Each pivot pin 43 can also be attached to the associated jaw 2, 3 or to the associated lever part 15 or mounting part 23 via a pivot joint 47. The geometric pivot axis u is oriented transversely to the axis of rotation z, and optionally, preferably, parallel to the geometric axes of rotation x and y of the movable jaw 3 and / or the movable handle part 5.

[0106] For this purpose, a pivot pin is formed on the pivot pin 43 in extension of the section received in the base body 28 of the press jaw 6, 7, which can be covered on both ends by guide jaws 49 that are enlarged compared to the pin diameter.

[0107] The respective pivot pin 48 is received in a form-fitting cavity 50 of the associated jaw 2, 3 or the associated lever part 15 or mounting part 23, which cavity 50 preferably has a cross-section as shown in the illustration in Fig. 15 extends beyond half the circumference of the pivot pin 48 in order to offer a captive mounting of the pivot pin 43.

[0108] In conjunction with the aforementioned pivotability about the given pivot axis u and the removable press jaws 6, 7 from their respective pivot pins 43, the press jaws 6, 7 can be easily removed and fitted with new ones. For example, to remove them, the plug 45 of the first press jaw 6, which is associated with the fixed jaw 2, can first be removed. The first press jaw 6 can then be moved towards the opposite second press jaw 7 in the direction of the approach r, with the ribs 29 and 31 interlocking. The pivot pin 43 then leaves the recess 44, after which the entire pair of press jaws can be pivoted forward about the pivot axis u of the second press jaw 7, which is associated with the movable jaw 3, for example, by a pivot angle of approximately 15° to 30°.In this position, but also possible beforehand, the additional plug-in part 45 of the second press jaw 7 can then be removed, after which the entire pair of press jaws can be removed from the pivot pin 43 of the second press jaw 7. The assembly of a pair of press jaws is carried out in reverse order.

[0109] Alternatively, the second press jaw 7 can first be detached from the associated pivot pin 43 and then moved towards the first press jaw 6, after which the pair of press jaws is pivoted forwards around the pivot axis u of the press jaw 6, the first press jaw 7 is detached from the pivot pin 43 and finally the press jaw pair thus detached is

[0110] In one of the jaws of the crimping tool, the fixed jaw 2, the associated crimping jaw 6 is connected to the fixed jaw 2 by means of the aforementioned retaining part 23. The retaining part 23 is inherently spring-loaded in the sense that it can deflect in the opposite direction of crimping. In the area of ​​the fixed connection, there is no, or at least practically no, relative movement between the retaining part 23 and the fixed jaw 2 during crimping with the crimping tool.

[0111] The retaining part 23 can move relative to the stationary jaw 2 during crimping. This movement results, at least in essence, from elastic deformation in response to the forces acting on the jaw 6 during crimping, which are absorbed by the retaining part 23. However, this mobility is limited by a stop formed on the retaining part 23 and / or the stationary jaw 2. When a corresponding force is applied or the retaining part 23 deforms, this stop creates a gap between the retaining part 23 and the stationary jaw 2. Once this stop is reached, the resilient area of ​​the retaining part 23 effectively shortens. Under further force, the retaining part 23 no longer deflects elastically by the same amount as it did previously under a corresponding force.However, this results in a further degree of springiness.

[0112] The stop connection 25 provided in the area of ​​the mounting part 23 associated with the stationary pliers jaw 2 is formed by a stop, specifically and preferably by a stop section 51. The stop can abut an edge of the mounting part 23. Preferably, and as shown in the exemplary embodiment, the mounting part 23 has an elongated hole 53 in which the stop, preferably in the form of the pin 52, is received. In the given case, if provided in this way, the elongated hole 53 extends with its longitudinally directed central axis substantially perpendicular to the aforementioned center line a of the mounting part 23.

[0113] The elongated hole 53 has a width adapted to the diameter of the pin 52, while the length considered perpendicular to this can correspond to approximately 1.5 to approximately 2 times the pin diameter.

[0114] The mounting part 23 is suitable for bending deformation during the application of a pressing force, in particular for bending deformation essentially against the direction of travel r and transverse to the center line a. During this bending deformation, which initially and essentially results from the clamping in the area of ​​the fixed connection 27 to the fixed jaw 2, the elongated hole 53 in the mounting part 23 can come into contact with the stop section 51 or the pin 52. The mounting part 23 is only supported in this contact position in the area of ​​the stop connection 25, which, during the application of further pressing force, e.g., when pressing larger diameter workpieces W, causes a predominant bending stress on the mounting part 23, possibly solely in the mounting part section 24.

[0115] The workpiece W to be crimped can, as preferably and shown, be a wire end ferrule 57 that comprises conductor ends 58 of a cable. The crimping process achieves a pull-out resistant connection between the wire end ferrule 57 and the conductor ends 58 due to deformation of the wall 59 of the wire end ferrule 57.

[0116] The retaining part 23 is preferably designed as a flat part with a thickness d that is smaller than its length l. In the illustrated embodiment, the length l corresponds to approximately 15 to 30 times, and furthermore approximately 20 times, the thickness d. The retaining part also preferably rests practically directly against a corresponding flat side of the stationary jaw 2 of the clamp.

[0117] Furthermore, a minimum cross-section b, b', considered transversely to the center line a, is obtained, particularly in the respective central area, or at least in the middle third of the length, of the support part section 24 and the support part section 26. The minimum cross-section (dimension b') between the fixed connection 27 and the stop connection 25 is preferably larger than the minimum cross-section (dimension b) between the stop connection 25 and the support area for the first press jaw 6. The dimension of the minimum cross-section 6 between the stop connection 25 and the press jaw support can correspond to 0.3 to 0.8 times the dimension of the minimum cross-section b' between the stop connection 25 and the fixed connection 27.

[0118] In the illustrated embodiment, viewed in the direction of extension of the center line a, starting from the mounting area for the first press jaw 6 and extending towards the stop connection 25, a smaller cross-sectional dimension b is consistently present over half to 2 / 3 of the corresponding length of the mounting part section 24 compared to the cross-sectional dimension b' over the entire length of the mounting part section 26 extending between the stop connection 25 and the fixed connection 27. Accordingly, an area of ​​maximum deformation can occur in the mounting part section 24 between the stop connection 25 and the mounting area for the first press jaw 6.

[0119] This enables a favorable force-displacement ratio, allowing workpieces W with different diameters to be pressed without changing the pressing jaws 6 and 7. The respective lever travel, particularly of the handle 5, is the same regardless of the workpiece diameter, up to a position where the locking pawl 20 disengages from the ratchet section 19. The movable handle 5, now released, can then be pivoted back, opening or distancing the pressing jaws 6 and 7 from each other.

[0120] Furthermore, the force-displacement compensation is supported by a possible bending deformation in the area of ​​the lever part 15 associated with the movable jaw 3, or which directly forms this jaw 3, in particular in the lever section 16 resulting between the axis of rotation x and the pivot joint 47 of the associated second pressing jaw 7, which, viewed transversely to its essential longitudinal extent, has a smaller minimum cross-sectional dimension than the lever section 17 between the axis of rotation x and the pivot connection of the movable handle part 5.

[0121] The Figures 29 to 34 Figure 1 shows a pair of press jaws with press jaws 6 and 7 in a second embodiment. The ribs 29 and 31 of both press jaws 6 and 7 are provided with a protrusion 60 with respect to the respective ridge line 56.

[0122] In the longitudinal direction of the ridge line 56, a straight area 61 is formed on both sides of the protrusion 60. These straight areas 61 are arranged along a baseline 62 connecting the ends of the ridge line 56, beyond which baseline 62 the protrusion 60 is directed towards the press jaw opening 33.

[0123] The protrusion 60 can be of a convex shape according to the illustrated embodiment, with reference to a plan view as shown in Figure 31 circular segment shape.

[0124] The protrusions 60 of a rib set 54 or 55 lie in overlap with each other with reference to a view against the press jaw 6 or 7 on the rib end face 30, 32.

[0125] The extent e of the protrusion 60 beyond the imaginary baseline 62, particularly in the area of ​​a highest point 63 located furthest perpendicular to the baseline 62, corresponds in the illustrated embodiment to approximately one fortieth to one thirtieth of the greatest free extent length f of the baseline 62, which is established when the press jaw opening 33 is initially closed (cf. Fig. 31 and the corresponding magnification).

[0126] The length g of the protrusion 60, considered in the direction of extension of the baseline 62, can correspond to approximately one seventh to one quarter, and further to approximately one fifth, of the previously described extension length f of the baseline 62, according to the illustrated embodiment.

[0127] As further, particularly from the presentation in Figure 31As can be seen, the protrusion 60, with reference to the associated baseline 62 of the ridge line 56, is arranged eccentrically with respect to a center line M running perpendicular to the baseline 62, at least when the press jaw opening 33 is initially closed. Furthermore, the protrusion 60 can be entirely eccentric, correspondingly over its entire length g.

[0128] Furthermore, the bulge 60 can be offset off-center with respect to the central axis M in the direction of the intersecting base line 62 of the immediately adjacent rib 29 or 31 of the same press jaw 6 or 7, which runs perpendicular to the base line 62 having the bulge 60. With respect to the rib end face 30 or 32, the bulge 60 is correspondingly offset off-center with respect to the central axis M in the direction of the gusset formed by the ribs of the same press jaw.

[0129] From this wedge extends a first straight section 61 of the ridge line 56, with a length k that may correspond to approximately 0.3 to 0.8 times the length g of the protrusion 60, preferably approximately 0.5 times.

[0130] The further straight section 61 of the ridge line 56, which adjoins the protrusion 60 at the other end, is chosen to be significantly larger with respect to its length h than the straight section described above, thus having a length h that can correspond to approximately 1.5 to 2.5 times, and further to approximately 2 times, the length of the protrusion 60.

[0131] The Figures 32 to 34 show successive intermediate positions during a pressing process using press jaws of the second embodiment.

[0132] A workpiece W in the form of a wire end sleeve 57 with conductor ends 58 bundled inside it is placed into the press jaw opening 33. The wall 59 of the wire end sleeve 57 initially has a circular cross-section in the crimping area, i.e., in the unformed state, as shown in the illustration. Figure 32 The conductor ends 58 are loose, i.e. not securely held in this position in the wire end sleeve 57.

[0133] As the ribs 29 and 31 of the press jaws 6 and 7 engage, the protrusions 60 in the area of ​​the rib-side ridge lines 56 initially come into contact with the outer wall surface of the wire end sleeve 57.

[0134] With the aid of the protrusions 60, concave wall sections 64 are formed into the wall 59 of the wire end sleeve 57 as the press jaws 6 and 7 continue to engage. Preferably, the wall material is simultaneously deformed into the gussets between the facing ribs 29 and 31 of the press jaws 6 and 7, which are transverse to the direction of engagement r. This process forms corresponding wall sections with a straight cross-section along the potentially longer straight sections 61 of the ridge lines 56 in this press jaw position. Two immediately consecutive such straight wall sections of the wire end sleeve 57 form an angle of approximately 90 degrees to each other.

[0135] These straight wall sections end in concave wall sections 64 formed by the protrusions 60 (cf. Fig. 33 ).

[0136] As the press jaws 6 and 7 continue to move into each other until the press end position is reached according to Figure 34 The wall 59 of the wire end sleeve 57 is preferably also pressed into the gussets between the ribs of a press jaw 6 and 7 in the direction of travel r, and adapted accordingly to the shorter straight areas 61 of the ridge line 56 adjoining the protrusion 60.

[0137] For crimping smaller workpiece cross-sections, the crimping jaws 6 and 7 move further together. Crimping is performed with a smaller crimping jaw opening 33. Due to the interlocking action, the length of the crimped section of the longer, straight section 61 is reduced. Thus, on the crimped workpiece W, e.g., a wire end ferrule 57, approximately equal-length straight wall sections can be attached on both sides of the concave wall section 64, with respect to cross-section. Furthermore, the entire wall leg, especially with very small cross-sections, can essentially have a concave curvature, possibly extending directly into the corner areas.

[0138] In the deformed final position of the wire end sleeve 57, this results in an overall essentially rectangular, and in particular square, cross-section with concave wall sections 64, which, according to the material thickness of the ribs 29 and 31, are arranged on the wall side of the wire end sleeve 57 as shown in the illustration. Figure 35 The upper concave wall sections 64 shown in this illustration are formed by the protrusions 60 of the ribs 29 of one of the rib pairs 54 or 55 in the press jaw 6, while the lower concave wall sections 64 shown in the illustration are formed by the protrusions 60 of the ribs 31 of a rib set 54 or 55 of the press jaw 7.

[0139] The width m of a concave wall section 64, considered in the longitudinal direction WL of the workpiece, depends on the rib thickness or thickness of the end face 34, considered perpendicular to the longitudinal direction R of the rib, which also preferably determines the corresponding thickness of the protrusion 60.

[0140] The offset of the upper concave wall sections 64 to the lower concave wall sections 64 corresponds to the offset of the interlocking ribs of a press jaw 6 or 7, resulting in a distance n that is approximately equal to the width m. This further results in a distance p between two concave wall sections 64 arranged side by side in the longitudinal direction WL of the workpiece. This distance p depends on the distance between two ribs of a rib set 54 or 55 of a press jaw 6 or 7 that are oriented in the same direction. Thus, and preferably, the distance p can be approximately twice the width m of a wall section 64.

[0141] As in Figure 34As shown, the proposed method, using press jaws with protrusions 60, can produce a "homogeneous" wire end sleeve 57 completely filled with conductor ends 58, which leaves no empty areas in the cross-section that could lead to the gripped conductor ends 58 loosening.

Claims

1. Pressing pliers (1) comprising two pliers jaws (2, 3) provided with oppositely arranged press jaws (6, 7), the press jaws (6, 7) being jointly rotatable about a rotation axis (z) directed in the direction in which the press jaws (6, 7) move towards one another, the press jaws (6, 7) furthermore being rotatable about the rotation axis (z) even in a closed state without being hindered by a pliers jaw (2, 3), and one press jaw (6, 7) having a pivot pin (43), the pivot pin (43) being mounted for pivoting in one of the pliers jaws (2, 3), characterized in that the press jaw (6) is rotatable about the pivot pin (43) in an assembled state of the press jaws (6, 7).

2. Pressing pliers according to claim 1, characterized in that the rotatability about the rotation axis (z) is provided continuously or in steps.

3. Pressing pliers according to any one of the preceding claims, characterized in that a press jaw (6, 7) can be removed from the pivot pin (43).

4. Pressing pliers according to any one of the preceding claims, characterized in that the pivot pin (43) is seated in a form-fitting recess (44) of a base body (28) of a press jaw, passing through a lower surface (41) of the base body (28) of the press jaw (6, 7).

5. Pressing pliers according to claim 3, characterized in that a holder for the pivot pin (43) is formed by an insert part (45) which is received in a form-fitting manner both on the pivot pin (43) and on the press jaw (6, 7).

6. Pressing pliers according to claim 5, characterized in that the insert part (45) is U-shaped and / or resilient.

7. Pressing pliers according to any one of claims 3, 5 or 6, characterized in that the pivot pin (43) is received in the associated pliers jaw (2, 3) in a pivot joint (47) for pivoting about a pivot axis (u) extending transverse to the rotation axis (z), wherein, when the press jaw (6, 7) is released from the opposite pliers jaw (2, 3), the press jaws (6, 7) can be rotated individually or together in order to be pulled out of the pliers mouth in the direction of the rotation axis (z).

8. Pressing pliers according to claim 7, characterized in that a pivot journal (48) is formed on the pivot pin (43) in extension of the section accommodated in a base body (28) of the press jaw (6, 7).

9. Pressing pliers according to claim 8, characterized in that the pivot journal (48) is covered at both ends by guide cheeks (49) which are enlarged relative to the journal diameter.

10. Pressing pliers according to either of claims 8 or 9, characterized in that the pivot journal (48) is accommodated in a form-fitting cavity (50) of the associated pliers jaw (2, 3).

11. Pressing pliers according to claim 10, characterized in that the cavity (50) extends in cross-section beyond half of the circumferential extent of the pivot journal (48) so as to provide captive retention of the pivot pin (43).

12. Pressing pliers according to any one of the preceding claims, characterized in that the press jaws (6, 7) have ribs (29, 31) extending in a longitudinal direction (R) of the ribs, which move into one another during pressing, and in that a guide surface (F) extending transverse to the longitudinal direction (R) of the ribs is formed outside a working region of the ribs (29, 31), which guide surface cooperates with a guide projection (38) protruding from the opposite press jaw (6, 7).

13. Pressing pliers according to claim 12, characterized in that guide projections (38) opposite to one another with respect to the longitudinal direction (R) of the ribs are formed on each press jaw (6, 7).

14. Pressing pliers according to claim 13, characterized in that the opposite guide projections (38) are formed a plurality of times on a first side of the press jaw (6, 7), with an insertion opening remaining between them transverse to the longitudinal direction (R) of the ribs.

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