Stripping pliers

Abstract

The invention relates to stripping pliers (1) having two pliers jaws (2, 3), two outer clamping jaws (19, 20), two inner cutting jaws (22, 23) and two handle parts (4, 5), wherein, in the course of pressing together the handle parts (4, 5), the cutting jaws (22, 23) can be displaced by means of a pull rod (30) from a starting position into an end position, wherein, furthermore, the cutting jaws (22, 23) are guided in their displacement direction (r) on a slotted link part (46, 47) which is movable in the displacement direction (r) and which for its part is supported on a clamping jaw-mounted slotted link (48, 49), by means of which slotted link part (46, 47) the cutting jaws (22, 23) are moved towards one another to different degrees in dependence on a closed position of the clamping jaws (19, 20), which closed position determines the movement of the slotted link part (46, 47). In order to further improve stripping pliers of the type in question in particular in terms of the cutting depth adaptation of the cutting jaws, it is proposed that the slotted link part (46, 47) is adjustable independently of a closed position of the clamping jaws (19, 20) with respect to a position relative to the slotted link (48, 49).

Description

Description Wire stripper field of technology

[0001] The invention relates to wire strippers with two jaws, two outer clamping jaws, two inner cutting jaws and two handle parts, wherein the cutting jaws can be moved from a starting position to an end position by means of a pull rod in the course of squeezing the handle parts together, wherein furthermore the cutting jaws are guided in their direction of movement on a cam part movable in the direction of movement, which in turn is supported on a cam fixed to the clamping jaws, by means of which cam part the cutting jaws are moved to different distances towards each other depending on a closing position of the clamping jaws, which closing position determines the movement of the cam part. State of the art

[0002] Wire strippers of the type in question are known. These are used for stripping electrical cables. In this context, so-called automatic wire strippers are known, which cut the insulation in one step and then, as the handles are squeezed further, pull it off the conductor. The cutting depth of the cutting blades must be adjusted to the thickness of the insulation layer in order not to damage the exposed conductor.

[0003] In this context, wire strippers are known which automatically adjust the cutting depth of the cutting jaws depending on the cable thickness. Reference is made, for example, to EP 1 557920 Bl (US 7,513,177 B2). The content of this patent specification is hereby fully incorporated into the disclosure of the present invention, including... the purpose of incorporating features of this patent specification into the claims of the present invention. Summary of the invention

[0004] With regard to the prior art described above, one object of the invention is seen as being to further improve a wire stripper of the type in question, in particular with regard to the cutting depth adjustment of the cutting blades.

[0005] According to a first inventive concept, one possible solution to the problem is given in a wire stripper, in which the cam part is adjustable with respect to a position relative to the cam independently of a closed position of the clamping jaws.

[0006] According to the proposed design, in addition to an automatic adjustment of the cutting depth due to the enabling of a relative displacement of the cam section on which the associated cutting jaw is supported, as is further known from the aforementioned prior art, it also enables, in particular, manual adjustment of the cam section.

[0007] Experience has shown that the thickness of the insulation to be cut and subsequently removed can vary, even between different batches or cables from different manufacturers with the same conductor cross-section. In such cases, the cutting depth can be adjusted according to the proposed solution. The relative displacement of the cam section to the associated cam is independent of the clamping jaw position.

[0008] With regard to manual additional adjustment, a suitable handle may be provided on the wire stripper, with the help of which the cutting depth of the cutting jaws, which is automatically adjusted during the use of the wire stripper, can be further reduced or increased.

[0009] Further features of the invention are explained below, also in the description of the figures, often in their preferred relation to the subject matter of claim 1 or to features of further claims. However, they may also be related to only individual features of claim 1 or the respective further claim, or independently of their significance.

[0010] In a preferred embodiment, one jaw of the pliers is fixed, while the other jaw is movable due to a rotational movement relative to the fixed jaw. The fixed jaw can be rigidly connected to its corresponding handle, while the movable jaw may be only indirectly connected to the handle, for example, via a lever mechanism in a known manner. This mechanism causes the movable jaw to pivot relative to the fixed jaw when the handles are pressed together.

[0011] In one possible embodiment, the cam element can be slidably mounted on the movable jaw of the clamp with respect to a (geometric) axis of rotation. The displacement of the cam element relative to the associated cam is preferably limited. A possible displacement path of the cam element can be adjusted according to the known automatic cutting depth adjustment, depending on the cable thickness. Furthermore, the possibility of manual intervention is provided, allowing for the initial position of the cam element to be adjusted. The position of the backdrop can be partially altered. From this potentially changed starting position, the relative displacement of the backdrop part to the backdrop occurs as the handle parts are pressed together.

[0012] In further detail, the cam element is preferably displaceable by means of a connecting rod rotatably connected to the cam element and / or a linkage rotatably connected to the cam element. The actual rotation angles resulting from stripping are comparatively small, for example, only in the range of single-digit degrees or up to, for example, 20 degrees. A pivot axis formed between the connecting rod and / or the linkage and the cam element can preferably be used to change the relative initial position. For example, the pivot axis can be designed as an eccentric component, so that the distance to the cam element can be changed starting from a geometric axis of rotation.

[0013] The inherently movable rotary bearing of such a rotary axis provides the necessary mobility while simultaneously guiding it.

[0014] The axis of rotation can therefore be adjusted independently of the closing position of the jaws relative to each other, either with respect to the movable jaw or the fixed jaw. Fine-tuning of the automatic cutting depth adjustment is achieved by changing the initial position of the axis of rotation.

[0015] As further preferred, two cam sections can be provided, wherein a first cam section acts on the cutting jaw associated with the movable jaw of the pliers and a second cam section acts on the cutting jaw associated with the stationary jaw of the pliers. The first cam section acts with a The first set of parts is assembled in the movable jaw of the tongs, the second set of parts with a second set of parts in the fixed jaw of the tongs.

[0016] It is further preferred that the displacement of the cam components relative to the cams or the associated jaws is coupled, so that, according to the cited prior art, the cam components have equal displacement distances during handling of the wire stripper. Even with the (manual) adjustability proposed according to the invention, independent of the closed position of the jaws, a preferred embodiment ensures equal action on both cam components.

[0017] The cam element associated with the movable jaw of the pliers can be mounted in the stationary jaw of the pliers via a first axis guided in a first elongated hole. In a preferred embodiment, the axis of rotation formed by this axis extends transversely to a displacement direction of the cam element, as well as transversely to a displacement direction of the associated cutting jaw. Equivalently, the cam element associated with the stationary jaw of the pliers can be mounted in the movable jaw of the pliers via a second axis guided in a second elongated hole. This second axis also extends with its geometric axis of rotation preferably transversely to a displacement direction of the cam element. Thus, in a possible embodiment, the cam element is indirectly, and preferably only via a portion of the pivot path of the movable jaw of the pliers, coupled to the movable jaw of the pliers.

[0018] The engagement of the first axis in the first elongated hole, as well as the engagement of the second axis in the second elongated hole, provides guidance and the possibility of relative displacement of the respective cam section to the jaw of the clamp that has the respective elongated hole. The in The longitudinal extent of the respective elongated hole, and the considered limit of the elongated hole, can provide a stop for the axis, thus further defining a maximum adjustability of the cutting depth of the cutting jaws.

[0019] With regard to a (manual) presetting of the initial position of one or both cam sections, the relative arrangement of the first and / or second axis in the first and / or second elongated hole can be adjusted independently of a pivot position of the clamping jaws relative to each other, or such an independent adjustment can result from an action at another point on a sliding mechanism of the cam section(s). The sliding mechanism is preferably provided here by the aforementioned link and / or connecting rods. Such a different initial position can be achieved by a different initial position of the axis(es) relative to the associated elongated hole before the start of stripping. Due to such an initial position, a further automatic adjustment of the cutting depth occurs during the closing of the pivoting cams and the gripping of a cable to be stripped between the clamping jaws.

[0020] The additional, preferably manual, adjustability can be achieved via a first and / or second eccentric. The eccentric can, preferably, be rotatably arranged about a geometric axis running parallel to the aforementioned cam-side rotation axes, optionally with limited rotatability. It can, for example, be an eccentric disc whose wall, rotating eccentrically to the axis of rotation, acts directly or indirectly on the cam section.

[0021] In the case of two eccentrics, they can be identical in design. However, different designs are also possible. further preferably with adaptation of a transmission means connected between the eccentric and the associated cam part.

[0022] The two eccentrics can be arranged and designed to rotate independently of each other about their respective axes of rotation. In a further possible embodiment, the first and second eccentrics are formed on a common eccentric part with a common axis of rotation. The eccentric part can, preferably, be a single-piece component, optionally also formed from a single material.

[0023] The first and / or second eccentric can also be connected to the first and second axles, respectively, by means of a first and a second linkage section, for indirect interaction with the cam components. In a preferred embodiment, the eccentric can act directly on the linkage.

[0024] The fine adjustment of the cutting depth made possible by the proposed solution can be achieved, for example, by directly rotating the eccentric part. For this purpose, the eccentric part can be extended outwards for operation and may also include a handle.

[0025] Due to the fine adjustment that is possible, the cutting depth can be adjusted beyond the automatic adjustment, with the manual adjustment offering cutting depth regulation in the hundredths of a millimeter range, e.g. down to a tenth of a millimeter. Brief description of the drawings

[0026] The invention is explained below with reference to the accompanying drawing, which, however, only represents one embodiment. The drawing shows: Fig. 1 shows a perspective view of wire strippers; Fig. 2 shows a pair of cutting jaws in a perspective view; Fig. 3 shows the pair of cutting jaws in side view; Fig. 4 shows another perspective view of the cutting jaw pair; Fig. 5 shows the section according to the finish VV in Figure 4; Fig. 6 shows a section view through the wire stripper, in an unactuated basic position; Fig. 7 shows a representation corresponding to Figure 6, but relating to an intermediate position during operation; Fig. 8 shows a subsequent illustration to Figure 7 in the course of further operation of the wire stripper; Fig. 9 is a subsequent illustration to Figure 8, concerning the actuation end position; Fig. 10 shows a longitudinal section view of the wire stripper, essentially corresponding to Figure 7, relating to a release position of a pull rod to enable a change of the cutting jaw pair; Fig. 11 the Her from V Enlargement of area XI in Figure 6; Fig. 12 shows the area depicted in Figure 11 in partial section Perspective view; Fig. 13 shows another perspective exploded view of the [unclear text] in the Figures 11 and 12 show the area depicted; Fig. 14 shows a clamping jaw of the wire stripper in front view; Fig. 15 shows the clamping jaw in another view; Fig. 16 shows the clamping jaw in side view; Fig. 17 the Her from V Enlargement of area XVII in Figure 16; Fig. 18 shows the top view of the clamping jaw according to arrow XVIII in Fig. 14; Fig. 19 shows the section along line XIX-XIX in Figure 18; Fig. 20 shows the section along line XX-XX in Figure 18; Fig. 21 shows a cutting edge of a cutting jaw in a perspective single view; Fig. 22 shows the section along line XXII-XXII in Figure 21 through the Cutting edge; Fig. 23 the cutting edge in an enlarged side view; Fig. 24 shows an enlarged schematic sectional view of the arrangement of both cutting edges of the cutting jaw pair; Fig. 25 shows a perspective view of the jaw area of ​​the pliers with the cable to be stripped inserted between the jaws; Fig. 26 shows a partial exploded view of area XXVI in Figure 1; Fig. 27 shows the jaws of the wire stripper in an exploded view, as well as means for adjusting the cutting depth of the cutting jaws; Fig. 28 shows another perspective view according to Figure 27; Fig. 29 in perspective view the adjustment means arrangement for setting a cutting depth of the cutting jaws; Fig. 30 shows the adjustment mechanism arrangement in side view; Fig. 31 shows a side view of an eccentric part of the adjustment mechanism. Arrangement with a first and a second eccentric; Fig. 32 shows the arrangement according to Figure 31 in perspective view; Fig. 33 shows the section along the line XXXTTT-XXXTTT in Figure 31 through the area of ​​the first eccentric s; Fig. 34 shows the section along line XXXIV-XXXIV in Figure 31 through the area of ​​the second eccentric; Fig. 35 a schematic sectional view of area XXXV in figure 7; Fig. 36 shows a representation corresponding to Figure 35, but after manual adjustment of the cutting depth via the adjustment means arrangement.

[0027] The figure shown and described, initially with reference to Figure 1, is a wire stripper 1 with two jaws 2, 3 and two handles 4, 5. The jaws 2 and 3 define a jaw opening M.

[0028] The jaw of the pliers 2, which is referred to below as fixed, is directly and firmly connected to the handle part 4 via a cheek area 6.

[0029] In the cheek area 6, the wire stripper 1 provides a bearing for a pivot axis 7 with a geometric axis x, about which the movable jaw 3 further below is rotatably mounted.

[0030] The bearing of the movable jaw 3 on the axis of rotation 7 results in the area of ​​a shoulder area 8 of the movable jaw 3 extending in the direction of extension of the axis x in projection to the cheek area 6 of the stationary jaw 3.

[0031] The jaw opening position, for example as shown in Figure 6 is stop-limited, due to the support of a projection area 9 on the movable jaw 3 on an associated support surface 10 of the stationary jaw 2.

[0032] The further handle part 5 is pivotally mounted about a further geometric axis y, which is aligned parallel to the axis of rotation 7 or its geometric axis x. The corresponding physical axis is likewise held in the cheek area 6 of the fixed jaw 2 or the fixed handle part 4.

[0033] The movable handle part 5 can be pivoted about the axis y in the direction of the fixed handle part 4, whereby a pivot V Positioning the movable handle part 5 towards the fixed handle part 4 causes a coupled rotary movement of the movable jaw 3 around the axis x.

[0034] For this purpose, a preferably angled control lever 11 is attached to the movable handle part 5, the free end of which, in the illustrated embodiment with a roller 12 preferably arranged in this area, acts on an, for example, cam-like extension 13 of the shoulder area 8 of the movable jaw of the pliers 3.

[0035] The control lever 11 is pivotally mounted on the movable handle part 5. The pivot axis for this movement preferably runs parallel to the geometric axis of rotation x.

[0036] A return spring 14, preferably in the form of a torsion spring, acts between the control lever 11 and the movable handle part 5. This spring biases the movable handle part 5 towards the basic position shown in Figure 6.

[0037] In this basic position, a projection area 15 extending away from the grip area with reference to the geometric axis y of the movable handle part 5 acts on the shoulder area 8 of the movable jaw of the pliers 3 in such a way that it is forced and held in its stop-limited basic position.

[0038] Furthermore, the movable handle part 5 acts via a linkage 16 on a cutting edge 17 which is pivotally mounted in the cheek area 6 of the stationary jaw 2. The cutting edge 17 is mounted in the cheek area 6, with its geometric axis z also running parallel to the geometric axis of rotation x of the movable jaw 3.

[0039] The cutting edge 17 lies exposed in a free-cut area 18 of the fixed jaw 3 or cheek area 6 and is preferably used for cutting a cable to length, for example a cable to be stripped in a further step.

[0040] The pivoting movement of the cutting edge 17 during the pivoting displacement of the movable handle part 5 towards the stationary handle part 4 causes any cable that may be located in the area 18 to be cut off. S The support of the cable on the flanks of the cheek area 6, which define the area 18, is severed by the pivoting cutting edge 17.

[0041] The two jaws of the pliers 2 and 3 each have an outer clamping jaw 19, 20, for clamping a cable 21 inserted into the jaws of the pliers for stripping a free end, see also Figures 13 to 16.

[0042] Furthermore, two inner cutting blocks 22, 23 are provided with respect to the arrangement of the clamping jaws 19 and 20 relative to the geometric axis of rotation x, each with cutting edges 24, 25 fixed in the end region facing the clamping jaws 19 and 20. The cutting edges 24 and 25 are arranged to face each other.

[0043] The cutting jaws 22 and 23, for which further details are also referred to Figures 2 to 5, are combined to form a pair of cutting jaws 26 and are connected to each other in the area of ​​the ends facing away from the cutting edges 24 and 25 via a pivot axis 27, which pivot axis 27 allows the cutting jaws 22 and 23 to pivot relative to each other.

[0044] In the ready-to-use arrangement of the cutting jaw pair 26, the geometric axis of the pivot axis 27 preferably extends in parallel alignment to the axis of rotation x of the movable jaw 3.

[0045] Between the cutting jaws 22 and 23 a spring 28, in the illustrated embodiment in the form of a cylindrical compression spring, is arranged, which spring 28 loads the cutting jaws 22 and 23 into an open position spaced apart from each other.

[0046] In the illustrated embodiment, a stop slide 29, which can be locked in the extension direction of the cutting jaw 22, is provided on the lower cutting jaw 23, i.e. on the cutting jaw 22 associated with the stationary pliers jaw 2, to provide a stop for the free end of the cable 21 inserted into the jaws M of the pliers, in order to define the length of the area to be stripped.

[0047] The cutting jaws 22 and 23 are guided laterally in the respective associated pliers jaws 2, 3, see also, for example, Figures 12 and 13, to enable proper sliding displacement of the cutting jaws 22 and 23 in the direction of their longitudinal extension, i.e., starting from an initial position associated with the clamping jaws 19 and 20 in the direction of an end position spaced apart from the clamping jaws 19 and 20 and displaced in the direction of the axis of rotation x, and from this end position back to the initial position.

[0048] For this relocation of the cutting jaws 22, 23, preferably the A pull rod 30 is provided for the pair of cutting jaws 26. The cutting jaws 22, 23 can be moved from a starting position to an end position by compressing the handle parts 4, 5 against the force of a spring 39 acting on the pull rod 30. For this purpose, the pull rod 30 is preferably further penetrated by a pull axis 33 that is movable in, for example, an elongated hole 34. The pull rod 30 also preferably has a sliding element attached to it at its handle-side end. The sliding element can be displaced relative to the pull rod 30 against the force of the spring 39, in order to release the pull rod 30 on a handle-side bearing.

[0049] The sliding part can in particular be designed as a sleeve 35.

[0050] When the pull rod 30 is released from its handle-side bearing, it can pivot about the pull axis 33. By pivoting accordingly, the cutting jaws 22, 23 are released from the pull rod 30.

[0051] The pull rod 30 is also guided through the physical axis of rotation 7 by means of a pull rod-side, elongated hole-like recess 31.

[0052] Associated with the pivot axis 27 of the cutting jaw pair 26, the drawbar 30 has an entry opening 32 that is directed essentially towards the stationary jaw 2 and, furthermore, essentially in the closing and opening direction of the cutting jaws 22 and 23. This opening is created by an overall hook-like design of the corresponding end region of the drawbar 30.

[0053] In this entry opening 32, under normal operating conditions, SThe adjustment of the wire stripper 1 engages the pivot axis 27 of the cutting jaw pair 26, so that a sliding displacement of the pull rod 30 made possible by the elongated design of the recess 31 leads to a corresponding sliding displacement of the cutting jaw pair 26.

[0054] This sliding displacement of the pull rod 30 is made possible by a coupling with the control lever 11 held on the movable handle part 5, which control lever 11 has a pull axis 33 aligned parallel to the axis of rotation 7, which in the illustrated embodiment is also the axis for the roller- le 12 can form a slot 34 on the pull rod side. A central longitudinal line of the slot 34 forms an acute angle α of approximately 60 to 85°, or for example approximately 75°, with a displacement direction r of the pull rod 30.

[0055] A section of the pull rod 30, which is bent in relation to the area guided particularly in the region of the pivot axis 7 and the pull axis 33, runs in the usual operating position of the wire stripper 1, if necessary inside the fixed handle part 4, in any case in association with it.

[0056] At the end closest to the handle, the pull rod 30 is enclosed by the aforementioned sleeve 35. This sleeve is preferably captive and held in place on the pull rod 30, while still allowing the sleeve 35 to slide relative to the pull rod 30. This is made possible by a pin-shaped retaining element 36 that penetrates the cross-section of the sleeve, with the pin-shaped retaining element 36 being fixed at each end in the area of ​​the sleeve wall 37. The pin-shaped retaining element 36 penetrates the pull rod 30, which is received at the end of the sleeve 35, in the area of ​​a further elongated hole 38.

[0057] Inside the sleeve 35, the spring 39 is arranged in the form of a cylindrical compression spring, which is supported at one end on the base 40 of the sleeve 35 and at the other end on a shoulder 41 of the drawbar 30 facing the base 40. Accordingly, a relative displacement of the drawbar 30 and the sleeve 35 in the direction of the longitudinal axis of the sleeve against the force of the spring 39 is enabled.

[0058] In the illustrated embodiment, the sleeve 35, together with the associated end region of the pull rod 30, is received in a recess 42 on the inside of the handle, with the sleeve 35 being in the ready-to-use position The state of the wire stripper 1 can be supported on a cavity floor 43 via a pin-shaped extension projecting beyond the base 40.

[0059] Furthermore, the sleeve 35 has a detent projection 44 for engagement with a detent recess 45 formed on the handle part 4, in particular in the area of ​​the cavity 42.

[0060] According to the arrangement and design of the spring-loaded sleeve 35 described above, the pull rod 30 can be released from its bearing on the handle side (see Figure 10). As already explained above, the pull rod 30 can then be pivoted about the axis of rotation 7, which is also made possible by the pull axis 33 guided in the elongated hole 34 of the pull rod 30. This pivoting movement of the pull rod 30 towards the movable handle part 5 causes the free end of the pull rod 30, which has the insertion opening 32, to pivot open, thus releasing the pivot axis 27 of the cutting jaw pair 26. In addition, a linear movement, guided by the axis of rotation 7 engaging in the elongated recess 31, may optionally occur superimposed on the pivoting movement of the pull rod 30. In this process, the control lever 11, which is dragged along the drawbar 33, is pivotally displaced against the force of the return spring 14.

[0061] In the pivoted and optionally sliding position of the drawbar 30 as shown in Figure 10, the cutting jaw pair 26 can be removed in a handling-friendly manner, preferably by performing a pivoting movement of the cutting jaws 22 and 23 towards a closing position opposite to the Cutting jaws 22 and 23, load-bearing spring 28.

[0062] Proper operation is also ensured after re-inserting a pair of cutting jaws 26. S The position of the wire stripper 1 can be assumed in a handling-technically favorable and tool-free manner.

[0063] The cutting jaws 22 and 23 can be moved towards a closed position against a spring 28 which loads the cutting jaws 22 and 23 into an open position as shown, for example, in Figure 6, when the handle legs 4 and 5 are brought together.

[0064] The cutting jaws 22 and 23 are further removed as a pair for replacement. In more detail, the cutting jaws 23 and 23 are pivotally connected to each other via a pivot axis 27, which is preferably also designed as an axle pin.

[0065] Each cutting jaw 22, 23 is supported in the associated pliers jaw 2, 3 via a cam section 46, 47, which cam section 46, 47 in turn is supported on a clamping jaw fixed cam 48, 49.

[0066] This indirect support of the cutting jaws 22, 23 on the respective pliers jaws 2, 3 is known from the aforementioned EP 1 557 920 Bl. Reference is also made to the content of this patent specification regarding its mode of operation.

[0067] The sliding wedge-shaped cam section 46 or 47 is suitable for displacement along the cam 48 or 49, which is designed as a sliding wedge surface on the jaw side. The radii of the interacting surfaces of cam sections 46, 47 and cam 48, 49 are matched to each other. Overall, the sliding displacement of the cam sections 46 and 47 is essentially achieved in Direction of movement r of the drawbar 30 and the cutting jaw pair 26 given.

[0068] The cam element 46 guided in the movable jaw 3 is preferably connected to the cheek area 6 of the fixed jaw 2 or the fixed handle 4 via a connecting rod 50, this via a first axis 51 provided at the end of the connecting rod 50, which is guided in the cheek area 6 in a first elongated hole 52.

[0069] The cam element 47 guided in the stationary jaw 2 can also have a connecting rod 53 which can carry a second axle 54 at its end for engagement in a second elongated hole 55 provided in the shoulder area 8 of the movable jaw 3.

[0070] With reference to a basic position, for example according to the representation in Figure 6, the elongated holes 52 (see also Figure 25) and 55 (see also Figure 27) are aligned with reference to a projection of the same in the direction of the geometric axis of rotation x into a plane perpendicular to the axis of rotation x such that they each enclose an acute angle of approximately 45° to the displacement direction r, with both elongated holes 52 and 55 being inclined essentially in the direction of the axis of rotation x.

[0071] As a result of the aforementioned arrangement of the cam parts 46 and 47 in conjunction with the jaw-side cams 48 and 49, as well as further as a result of the connection of the cam parts 46 and 47 via the connecting rods 50 and 53 to an area of ​​the substantially opposite jaw of the pliers, in the embodiment an automatic cutting depth adjustment is given depending on the cable outer diameter.

[0072] Depending on the diameter or thickness of the cable 21 to be gripped between the clamping jaws 19 and 20, different cutting depths of the cutting edges 24 and 25 of the cutting jaws 22 and 23 result when the handle parts 4 and 5 are compressed accordingly. This is because, depending on the gripping cable thickness and the associated distance between the clamping jaws 19 and 20 and, consequently, between the jaws 2 and 3, a sliding displacement of the cam sections 46 and 47 occurs along the cams 48, 49. As a result, the support point for the cutting jaws 22 and 23 on the cam sections 46 and 47 changes. Depending on the cable thickness, the cam sections 46 and 47 are displaced to the same extent in or against the direction of displacement r via the connecting rods 50 and 53.

[0073] The cutting depth is adjusted by squeezing together the handle parts 4 and 5, and above them the jaws 2 and 3, and thereby deflecting the movable jaw 3 about the axis of rotation 7, the lower cam part 47 in the stationary jaw 2 is slightly pulled away from the jaw tip via the connecting rod 53 connected to the movable jaw 3. This causes the cam part 47 to be displaced by a certain amount. This displacement closes the associated cutting bar 23 by a certain amount and simultaneously changes the angular position of the cam part 47.

[0074] Simultaneously, the movable jaw 3 is deflected via the cam section 46, which is connected to the stationary jaw 2 via the connecting rod 50, so that a relative movement of the cam section 46 with respect to the associated cam 48 occurs in the same direction as with the cam section 47. Thus, a feed movement of the associated cutting jaw 22 perpendicular to the longitudinal displacement and a positional correction of the cam section 46 also occur here.

[0075] As the handle parts 4 and 5 are squeezed together, the jaws of the pliers M close due to a corresponding pivoting movement of the movable jaw 3, superimposed on the closing of the cutting jaw pair 26 (see Figure 7). The cutting edges 17 of the cutting jaws 22 and 23 cut into the insulation sheath of the cable 21, with a cutting depth that, according to the design described above, adjusts automatically depending on the cable thickness.

[0076] The pivoting displacement of the movable jaw 3 is achieved by correspondingly acting on the roller 12 arranged on the control lever 11 on a control surface of the arm 13 facing the wire stripper 1, which in the basic position is approximately aligned in the direction of displacement r.

[0077] With further pivoting of the movable handle part 5 towards the stationary handle part 4 as shown in Figure 8, the roller 12 of the boom 13 slides along the facing and previously described end face of the boom 13, overcoming the restoring force of the spring 39 acting on the pull rod 30 in the sleeve 35. The pull rod 30 is pulled linearly in the direction of displacement r, dragging the cutting blade pair 26 along with it. This causes the insulation section 56, separated by cutting with the blades 17, to be stripped from the conductor.

[0078] As shown in Figure 9, when the handle parts 4 and 5 are further compressed, the roller 12 on the cantilever side leaves its supporting position relative to the cantilever 13 of the movable jaw 3, which pivots back towards its open-home position, while simultaneously opening the jaw M of the pliers and the cutting jaw pair 26. This occurs under among other things due to the restoring force of the spring 28 provided between the cutting jaws 22 and 23.

[0079] The cable 31, with its end stripped, is freely accessible for removal from the wire stripping pliers 1. The cut and removed insulation section 56 is freely accessible for removal or, if necessary, falls automatically from the jaws of the pliers M.

[0080] To enable adjustment of the automatic cutting depth of the cutting edges 24 and 25 of the cutting jaws 22 and 23, a central adjusting means can be provided. This can be, as shown by way of example in Figure 26, a one-piece eccentric part 57 with two eccentrics 58 and 59 spaced apart from each other in the axial direction of the eccentric part 57. Further reference is made to Figures 31 to 34.

[0081] Furthermore, the eccentric part 57 can form the axis of rotation 7, as also shown, in particular by means of an eccentric part area formed between the eccentrics 58 and 59, which is circular in cross-section and concentric.

[0082] The eccentric part 57, see also Figure 28, can be hollow-shafted to accommodate a central, solid shaft. This shaft can be further formed by a screw bolt 60, by means of which the eccentric part 57 can be rotatably mounted on the cheek area 6 of the stationary jaw 2. The screw bolt 60 is supported at its end by a collar on the cheek side. Opposite this collar in the axial direction, a screw connection is made with an externally accessible, plate-shaped handle 61, which engages with a square extension, as shown, in a correspondingly shaped coaxial recess 62 of the eccentric part 57 in a rotationally fixed manner. A rotational displacement of the handle 61 about the geometric axis of rotation x leads to This results in a rotational displacement of the eccentric part 57 overall. A detent rotational displacement may occur.

[0083] The second eccentric 59, which faces the handle 61 with respect to the central area of ​​the eccentric part 57 forming the axis of rotation 7, can be larger in diameter overall, i.e. also with respect to the cam-like extension, than the section forming the axis of rotation 7, while the further first eccentric 58, which is formed further away from the handle 61, can be smaller in diameter than the central area forming the axis of rotation 7.

[0084] The eccentrics 58 and 59 act via first and second links 63, 64 on the first and second axles 51, 54 of the connecting rods 50, 53 respectively (see figures 30, 35 and 36).

[0085] The adjustment of the automatic cutting depth setting, which is still provided by this design, is carried out by turning the handle 61, which leads accordingly to a rotational displacement of the eccentrics 58 and 59 via the positive locking connection, and further accordingly to a displacement of the control areas 65, 66, which are eccentrically pre-curved in cross-section relative to the geometric axis of rotation x, by the respective angular amount.

[0086] As can be seen from the sectional views in Figures 33 and 34, according to the illustrated embodiment, the control areas 65 and 66 of the eccentrics 58 and 59 can be arranged offset from each other by an angle β of approximately 90° with respect to the geometric axis of rotation x.

[0087] As a result of twisting the handle 61 and the associated rotation of the eccentrics 58 and 59 about the geometric axis of rotation x, an equal- Moderate and unidirectional displacement of the first and second axes 51, 54 of both connecting rods 50 and 53 in the associated first and second elongated holes 52, 55 is achieved (see arrows c). Figure 36 shows a handle position rotated 180° compared to the position in Figure 35. Accordingly, the control areas 65 and 66 of the eccentrics 58 and 59 are rotated into a position opposite the geometric axis of rotation x, with corresponding dragging of the associated links 63 and 64. In one possible embodiment, the latter encompass the circumferential end face of the respective eccentric s.

[0088] According to the example, the axes 51 and 54 are displaced by approximately half the extension of the respective elongated hole 52, 55 in the elongated hole 52, 55, with corresponding dragging of the connecting rods 50 and 53 attached to the axes 51 and 54 as well as the final cam parts 46 and 47.

[0089] In the case of such an adjustment device arrangement, the angular position of the cam parts 46 and 47 and their relative position to the respective cam 48, 49 with respect to the basic orientation in the jaw open position can be adjusted via the handle 61 and correspondingly via the eccentrics 58 and 59, from which basic position a further automatic adjustment to the cable thickness can be made during the usual use of the wire stripper 1.

[0090] According to the illustrations in Figures 35 and 36, an exemplary adjustment of the eccentrics 58 and 59 by 180° for adjusting the automatic cutting depth adjustment can create an opening of the cutting jaws 22 and 23 shown in these illustrations with respect to an opening W inkels g by a quarter to one-eighth, and further, for example, to about one-sixth of the angle measurement.

[0091] The relative arrangement of the first and second axes 51, 54 in the assigned elongated holes 52 and 55 is independent of a pivoting S Position of the clamping jaws 19, 20 or the pliers jaws 2 and 3.

[0092] The wire stripper 1 can be equipped with clamping jaws 19 and 20 and / or cutting edges 17 as described below.

[0093] The cutting edges 24, 25 of the cutting jaws 22, 23 can be fixed by means of screws 67 which can be operated from the front of the respective cutting jaw 22 or 23.

[0094] For this purpose, each cutting edge 24, 25, which is at least essentially plate-shaped, can have a bore 68 through which the respective screw 67 can pass.

[0095] The cutting edge 24, 25 has a direction towards the in use state. The pliers jaw M has a cutting edge 69, with an end that tapers at an acute angle in cross-section as shown in Figures 21 and 22, forming a contour line 70 in a side view according to Figure 23. In the side view according to Figure 23, the contour line 70 also forms a termination line of the cutting edge 17.

[0096] The contour line 70 may have a depression 71. This appears in a central area viewed along the longitudinal extent of the contour line 70 as a continuously curved line (curved area 72), preferably a circle. with a radius a, to which a line or section 73 with a lesser curvature preferably adjoins on both sides, continuing the enclosure of an inserted cable 21. According to the illustrated embodiment, this line adjoining the central curved line can be a straight line on both sides of the curvature, so that overall an essentially V-shaped indentation 71 of the contour line 70 results, with a V-tip correspondingly rounded with the radius a.

[0097] The contour line in section 73, which follows the rounded contour in area 72, can continue in the direction of the cutting direction b with respect to a cutting direction b of a cutting plane E (compare Figure 24). Accordingly, in the exemplary embodiment and with reference to Figure 29, it rises upwards from the indentation in the cutting direction b or falls downwards.

[0098] Limiting the depression 71, the contour line 70 preferably continues on both sides of the depression 71 into straight sections 73, 74, which can run according to a common straight line perpendicular to the cutting direction b.

[0099] The contour line 70 also extends in a plane extension of the cutting plane E, which is strictly curved (see Figures 3 and 11), cf. Fig. 23. The contour line 70 thus also extends in width and height, preferably less so in height than in the area of ​​the rounded contour and more so in width than in the area of ​​the rounded contour.

[0100] Each clamping jaw 19 or 20 can, as shown, first have a plate-shaped base body 75 with two opposing The broad side surfaces are laid flat. A fastening extension 76 projects vertically from a broad side surface when arranged approximately centrally. This extension can be plate-like, with a plate plane extending transversely to the orientation of a cable 21 to be gripped between the clamping jaws 19 and 20 when installed.

[0101] The fastening extension 76 enables the clamping jaw 19 or 20 to be attached to the corresponding pliers jaw 2 or 3, respectively, by inserting the fastening extension 76 into a correspondingly designed receiving pocket 77 of the pliers jaw 2, 3.

[0102] The clamping jaws 2, 3 are secured by a screw connection. The corresponding fastening screw 78 passes through a corresponding bore in the clamping jaws 2, 3 and an elongated hole 79 in the fastening extension 76, with the screw fastening of the clamping jaws 19, 20 being effected from an end face 80 of the respective clamping jaws 2, 3.

[0103] Both clamping jaws 19 and 20 are provided with ribs 81 extending transversely to a cable 21 to be clamped between the clamping jaws 19 and 20, with respect to the broad sides of the base bodies 75 which face each other in the installation situation. Groove-like recesses 82, each with a recess base 83, extend between these ribs 81.

[0104] According to the illustrated embodiment, and preferably, each clamping jaw 19, 20 can be provided with, for example, six such ribs 81, which are spaced evenly apart from each other when viewed transversely to the longitudinal extent of the ribs 81, see also Figure 18. Furthermore, the ribs 81 are arranged such that, depending on the thickness of the material to be clamped, Cable 21, but also without inserting a cable 21, can be inserted comb-like into the recesses 82 of the opposite clamping jaw.

[0105] All ribs 81 of both clamping jaws 19 and 20 can, as shown, be extended along part of their longitudinal extent, preferably further in the middle of their longitudinal extent. SThe extension has a concave bulge 84. This results, preferably when viewed in a longitudinal extension of an inserted cable, in a flush arrangement of the recesses 84 and viewed over all ribs 81, in a substantially central trough-shaped depression – in the sense of an enveloping surface over the contour lines of the bulges in the aforementioned longitudinal extension – with respect to the rib surface 85 pointing towards the jaw M of the clamp. Reference is also made to Figures 19 and 20.

[0106] The ribbed surface 85 on both sides of the protrusions 84 spans a total flat clamping surface L.

[0107] The width d of a projection 84, considered in the direction of extension of a rib 81, can correspond approximately to half the longitudinal extent of the rib. The depth e of a projection 84, considered perpendicular to the width d, can correspond approximately to half the maximum depth f of a recess 82, considered in the same direction.

[0108] The greatest depth f of a recess 82 in the illustrated embodiment can also correspond approximately to the 1.5-fold of the free distance g considered transverse to the rib longitudinal extension between two adjacent ribs 81 in the area of ​​their rib surface 85 (compare Ligur 17).

[0109] Furthermore, each rib 81, with respect to a cross-section transverse to the longitudinal extent of the rib 81, starting from the recess base 83, can They taper conically towards the rib surface 85. Thus, the outer rib surfaces defining the recess 82 can enclose a conical angle d of approximately 15° to each other.

[0110] The rib surface 85 of each rib 81 can extend, with respect to a longitudinal extent of the rib 81, over a partial area in a plane defining the clamping surface F, for example, as shown in Figure 17, over a length h which may correspond to approximately one-third of the total length k projected onto the clamping surface F. According to the embodiment shown in Figure 17, the section of the rib surface 85 extending beyond the length h can slope downwards at an angle e of approximately 5°.

[0111] The recess floor 83 can have different depths along the length of the recess 82, and thus different dimensions f. As also shown, a dome-shaped elevation 86 can be provided on the recess floor side in the area of ​​the bulge 84, with a width m, considered in the longitudinal extension of the recess 82, which can correspond to approximately one-third of the total length of the recess 82 or a rib 81, and a height n above the level of the area of ​​the recess floor 83 adjoining the elevation 86, which height n can correspond to approximately one-third to one-fifth of the greatest depth f of the recess 82.

[0112] The arrangement and dimensions of the bulge 84 and the elevation 86 can be further selected such that even in the area of ​​the elevation 86 the bulge 84 does not reach the recess base 83.

[0113] The foregoing statements serve to explain the inventions covered by the application as a whole, which represent the prior art. at least through the following combinations of characteristics, each of which can also be developed independently, whereby two, several or all of these combinations of characteristics can also be combined, namely:

[0114] A wire stripper characterized in that the cam part 46, 47 is adjustable independently of a closing position of the clamping jaws 19, 20 with respect to a position relative to the cam 48, 49.

[0115] A wire stripper characterized in that one jaw 2 is fixed and one jaw 3 is movable due to a rotational movement relative to the fixed jaw 2.

[0116] A wire stripper characterized in that the cam part 46 is rotatably mounted on the movable jaw 3 with respect to an axis of rotation.

[0117] A wire stripper characterized in that the axis of rotation with respect to the movable jaw 3 is adjustable independently of a closing position of the clamping jaws 19, 20 relative to each other.

[0118] A wire stripper characterized in that two cam parts 46, 47 are provided, wherein a first cam part 46 acts on the cutting jaw 22 associated with the movable jaw 3 of the pliers and a second cam part 47 acts on the cutting jaw 23 associated with the stationary jaw 2 of the pliers.

[0119] A wire stripper characterized in that the cam part 46 associated with the movable jaw 3 is in the stationary The jaw of the pliers 2 is mounted via a first axis 51 guided in a first elongated hole 52.

[0120] A wire stripper characterized in that the cam part 47 associated with the stationary jaw 2 is mounted in the movable jaw 3 via a second axis 54 guided in a second elongated hole 55.

[0121] A wire stripper characterized in that the relative arrangement of the first and / or second axis 51, 54 in the first and / or second elongated hole 52, 55 is adjustable independently of a pivot position of the clamping jaws 19, 20 relative to each other.

[0122] A wire stripper characterized in that the adjustability is achievable via a first and / or second eccentric 58, 59.

[0123] A wire stripper characterized in that the first and second eccentrics 58, 59 are formed on a common eccentric part 57 with a common axis of rotation x.

[0124] A wire stripper characterized in that the first and / or second eccentric 58, 59 are connected to the first and second axle 51, 54 by means of a first and a second link part 63, 64.

[0125] All disclosed features are essential to the invention (individually, but also in combination with one another). The disclosure of the application hereby also fully incorporates the disclosure content of the associated / attached priority documents (copy of the earlier application), also for the purpose of incorporating features of these documents into claims of the present application. The notification must be included. The dependent claims, even without the features of a referenced claim, characterize independent inventive developments of the prior art with their features, in particular for the purpose of filing divisional applications on the basis of these claims. The invention specified in each claim may additionally include one or more of the features in the preceding description, in particular those provided with reference numerals and / or specified in the list of reference numerals. The invention also relates to designs in which individual features mentioned in the preceding description are not implemented, in particular insofar as they are recognizably unnecessary for the respective purpose or can be replaced by other technically equivalent means. List of reference symbols 1 wire stripper 29 stop slide 2 fixed jaws, 30 pull rod 3 movable jaws, 31 recesses 4 fixed handle part 32 insertion opening 5 movable handle part 33 pull axis 6 Cheek area 34 Slotted hole 7 axis of rotation 35 sleeve 8 Shoulder area 36 Mounting part 9 Projection area 37 Sleeve wall 10 Support surface 38 Slotted hole 11 Control lever 39 Spring 12 rolls 40 floor 13 outriggers 41 shoulder 14 Return spring 42 Cavity 15 Protrusion area 43 Cavity floor 16 handlebars 44 ratchet projection 17 Cutting edge 45 Recess 18 cut-out area 46 scenery part 19 Clamping jaw 47 Backing piece 20 clamping jaw 48 backdrop 21 Cable 49 Backdrop 22 Cutting jaw 50 Connecting rod 23 Cutting jaw 51 First axis 24 cutting edge 52 first elongated hole 25 cutting edge 53 connecting rod 26 cutting jaw pairs 54 second axis 27 Swivel axis 55 second slotted hole 28 spring 56 insulation section Eccentric part 84 bulge First eccentric 85 Rib surface Second eccentric 86 Increase Screw bolt Handle a radius Recess b Cutting direction first handle c Arrow second handlebar width Control range e depth Control range f depth Screw g distance Bore h length Cutting tip k Total length Contour line m width Subsidence n height curved area r direction of displacement section x geometric axis of rotation section y geometric axis base body z geometric axis mounting extension E cutting plane Mounting pocket F clamping surface Mounting screw M jaw Slotted hole at an angle Front surface β angle Rib g Opening angle Recess d Cone angle Recessed bottom e angle

Claims

Claims 1. Wire stripper (1) with two jaws (2, 3), two outer clamping jaws (19, 20), two inner cutting jaws (22, 23) and two handle parts (4, 5), wherein the cutting jaws (22, 23) can be moved from a starting position to an end position by means of a pull rod (30) when the handle parts (4, 5) are compressed, wherein the cutting jaws (22, 23) are further guided in their direction of movement (r) on a cam section (46, 47) movable in the direction of movement (r), which in turn is supported on a cam section (48, 49) fixed to the clamping jaws, by means of which cam section (46, 47) the cutting jaws (22, 23) depending on a closed position of the clamping jaws (19, 20), which closed position the movement of the cam section (46, 47) is determined to be moved to different distances from each other, characterized in that the cam section (46, 47) is independent of a closed position of the clamping jaws (19, 20) with respect to a position relative to the cam (48,49) is adjustable.

2. Wire stripping pliers according to claim 1, characterized in that one jaw (2) is fixed and one jaw (3) is movable due to a rotational movement relative to the fixed jaw (2).

3. Wire stripper according to claim 2, characterized in that the cam part (46) is rotatably mounted on the movable jaw of the pliers (3).

4. Wire stripper according to claim 3, characterized in that the movable bearing is achieved by means of a rotary axis.

5. Wire stripper according to one of claims 2 to 4, characterized in that a rotation axis with respect to the movable jaw (3) is un- depending on the closing position of the clamping jaws (19, 20) relative to each other.

6. Wire stripper according to one of the preceding claims, characterized in that two cam parts (46, 47) are provided, wherein a first cam part (46) acts on the cutting jaw (22) assigned to the movable jaw of the pliers (3) and a second cam part (47) acts on the cutting jaw (23) assigned to the fixed jaw of the pliers (2).

7. Wire stripper according to claim 6, characterized in that the cam part (46) associated with the movable jaw (3) is mounted in the stationary jaw (2) via a first axis (51) guided in a first elongated hole (52).

8. Wire stripper according to one of claims 6 or 7, characterized in that the cam part (47) associated with the stationary jaw (2) is mounted in the movable jaw (3) via a second axis (54) guided in a second elongated hole (55).

9. Wire stripper according to one of claims 7 or 8, characterized in that the relative arrangement of the first and / or second axis (51, 54) in the first and / or second elongated hole (52, 55) is adjustable independently of a pivot position of the clamping jaws (19, 20) relative to each other.

10. Wire stripper according to claim 9, characterized in that the adjustability is achievable via a first and / or second eccentric (58, 59).

11. Wire stripper according to claim 10, characterized in that the first and second eccentrics (58, 59) are formed on a common eccentric part (57) with a common axis of rotation (x).

12. Wire stripper according to one of claims 10 or 11, characterized in that the first and / or second eccentric (58, 59) are connected to the first and second axle (51, 54) by means of a first and a second linkage part (63, 64).