EP2107650B1 - Press clamp with a positioning device - Google Patents

Abstract

The crimping pliers (1a) have a locator (9a) rotatable relative to a head (2a) around a pivoting axis (11a). The locator stays in connection with an activating element (54). The activating element is activated by the hand of a user for directly or indirectly causing a pivoting movement of the locator relative to the head, where the activating element has an extension. The activating element is designed and arranged such that the crimping pliers are actuated by gripping or contacting hand levers (16a, 17a) by the hand of the user.

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a pressing tongs with a positioner according to the preamble of patent claim 1.

STATE OF THE ART

Generic pressing tongs are used for pressing a workpiece in a tool arranged in a pliers head. For example, it is a so-called "crimping tool", which is used in particular for pressing a connector or contact with a partially stripped conductor end. The pressing tongs can also be designed as working tongs, with which a plastic deformation of the workpiece is produced or a part of the workpiece is cut off or punched out. Furthermore, a generic pressing tongs equipped with a positioner, which is also referred to as a "locator". Such a positioner serves the functionally correct arrangement of the workpiece relative to the pressing tongs, in particular to the at least one tool. In this case, the positioner can ensure that with the beginning of the pressing operation, the workpiece is positioned correctly relative to the tool, for example, the connector is in the correct position relative to the stripped conductor end and / or against the tool. Alternatively or additionally, during the actual pressing operation, the positioner can maintain or influence the relative position of the workpiece to the tool, for example during plastic deformation of the workpiece occurring. Particularly advantageous is a positioner when using the crimping pliers in conjunction with relatively small workpieces, in which a positioning by hand through an opening of the pliers head through relative to the moving tool parts is difficult or no longer possible.

In particular, in the manufacture of crimp connections, the connector on the one hand and the stripped conductor end on the other hand must each be brought into a predetermined relative position to the tools, which are designed here as a crimp die.

• Eine aus DE 27 18 165 A1 bekannte Presszange besitzt einen C-förmigen Zangenkopf, der somit seitlich offen gestaltet ist. In einer anderen Ausführungsform der DE 27 18 165 A1 bewegen sich die Werkzeugteile "scherenartig" zueinander. In beiden Fällen wird im Zangenkopf eine Zangenkopfebene festgelegt, die als Mittelebene der Haupterstreckungsrichtungen des Zangenkopfes anzusehen ist. Die bekannten Presszangen besitzen einen Positionierer, der um eine Schwenkachse zwischen einer Aufsteckstellung und einer Arbeitsstellung verschwenkbar ist. Der Positionierer weist mindestens eine Aufnahme für ein Werkstück auf. Die Schwenkachse ist hierbei vertikal zur Zangenkopfebene orientiert. Auf diese Weise ist es möglich, den Positionierer in die Aufsteckstellung zu verschwenken, das Werkstück in die Aufnahmestelle einzusetzen und den Positionierer mit dem aufgesteckten Werkstück durch die geöffnete Seite des Zangenkopfes in die Bearbeitungsstellung zu verschwenken, in der das Werkstück die vorgesehene Relativposition zu dem Werkzeug einnimmt. Hieran anschließend kann die Bearbeitung des Werkstücks in Form des eigentlichen Pressvorgangs erfolgen, indem der Antrieb der Presszange, hier zwei zueinander verschwenkbare Handhebel, betätigt wird.

With regard to the basic mechanical construction of the pressing tongs and the arrangement of the degree of freedom of movement and the configuration of the positioner, various embodiments are known from the prior art, which can be further developed by means of the invention:

• One out DE 27 18 165 A1 Known pressing tongs have a C-shaped pliers head, which is thus designed open to the side. In another embodiment of the DE 27 18 165 A1 The tool parts move "scissor-like" to each other. In both cases, a pliers head plane is set in the pliers head, which is to be regarded as the center plane of the main extension directions of the pliers head. The known pressing tongs have a positioner which is pivotable about a pivot axis between a Aufsteckstellung and a working position. The positioner has at least one receptacle for a workpiece. The pivot axis is in this case oriented vertically to the pliers head plane. In this way, it is possible to pivot the positioner in the Aufsteckstellung, insert the workpiece in the receiving point and to pivot the positioner with the attached workpiece through the open side of the pliers head in the machining position in which the workpiece the intended relative position to the tool occupies. Following this, the machining of the workpiece in the form of the actual pressing process can be done by the drive of the pressing tongs, here two mutually pivotable hand lever is operated.

Another pressing tongs, which in Fig. 1 is sold by the applicant under the type designation CS20KS. This pressing tongs also has a C-shaped, open to one side pliers head. At this pliers head, a positioner is linearly guided on an axis fixed to the pliers head, which is oriented according to the lower horizontal leg of the C and is arranged in a plane parallel to the pliers head plane. The positioner can be driven via a pivotable lever mounted on the pliers head, the pivoting movement of which is converted via a connection between a pin guided in a slot into a linear movement along the axis for the linear movement of the positioner.

Furthermore, a pressing pliers of the applicant with the type designation CS25KS is known in Fig. 2 is shown and has a C-shaped pliers head. In this pressing tongs a positioner is pivotally mounted about a pivot axis relative to the pliers head, which is oriented vertically to the pliers head plane. The positioner is pivotable about the rotation of a knurl in the pliers head plane between a plug-on position and a working position. As in Fig. 2 shown, the pivoting of the positioner is carried out in a two-handed operation, with one hand holding the crimping pliers in the range of the hand lever and the second hand causes a pivoting of the positioner.

DE 198 32 884 C1 discloses a crimping pliers with a pliers head in a plate construction, which is not C-shaped with one-sided opening, but O-shaped without opening in the circumferential direction. In accordance with the operation of hand levers a movable tool part is displaceable in the direction of a longitudinal axis relative to a pliers head fixed tool part. The document proposes a positioner, which is pivotable about a pivot axis, which is oriented parallel to the pliers head plane and transverse to the direction of movement of the tool parts of the pressing pliers. In a working position, the positioner is oriented substantially parallel to the pliers head plane. From this working position, the positioner can be swung out about the pivot axis in a Aufsteckstellung. For a pivoting of the positioner also a two-handed operation of the pressing tongs is required.

OBJECT OF THE INVENTION

The invention has for its object to provide a pressing tongs for pressing a workpiece whose operation is simplified.

SOLUTION

The object of the invention is achieved with the features of independent claim 1. Further embodiments of the solution according to the invention are obtained according to a pressing tongs with the features of the dependent claims 2 to 11.

DESCRIPTION OF THE INVENTION

According to the invention, a positioner is used, which is pivotable relative to a pliers head about a pivot axis, which is oriented parallel to a pliers head plane and is oriented transversely to the direction of movement of tool parts of the pressing pliers. Thus, the positioner "can be swung out of the pliers head plane". Without this being necessarily the case, such a degree of freedom of the positioner allows the use of the positioner for non-C-shaped pliers heads, since the positioner does not have to be moved through the opening of the C in the course of relative movement to the pliers head, as in particular for the prior art according to DE 27 18 165 A1 and the pressing tongs of the applicant CS20KS and CS25KS is the case.

According to the invention, the positioner is in operative connection with an actuating member, with the actuation of which a pivoting of the positioner relative to the pliers head can be brought about directly or indirectly. The actuating member is in this case designed and arranged such that it can be actuated by a hand of the user enclosing the hand lever of the pressing tongs. Thus, a pivoting of the positioner for one-handed operation of the pressing tongs is made possible according to the invention. This has the advantage that, for example, with the other hand of the user, the workpiece can be held and can be inserted into the tool of the pressing tongs.

While for the also operated in one-handed press pliers with the type designation CS20KS an operation with the thumb with an actuation of the thumb, which is greater with closure of the hand lever, due to the otherwise inventive orientation of the pivot axis of the way for the actuation of the actuator below Circumstances substantially independent or less dependent on a position of the hand lever. On the other hand, an alternative or improved operation, for example via an index finger in accordance with the invention may be possible. Finally, according to the invention, the elaborate actuating mechanism for the pressing tongs of the type CS20KS with a pivotable lever and a geared connection for converting the pivoting movement into a linear movement can be avoided.

For a further proposal of the invention, the actuator is formed with an arm or arm of the positioner, which allows easy connection and can be simple. By designing the length and the course of the arm or Jib can be worn a particularly good feel or good operation options of the actuator account.

For example, such an arm can be formed with a metal sheet, which in particular can be bent, bent or twisted to bring about a desired geometry and suitable actuating surfaces.

For a further proposal, the arm or the sheet is multifunctional in the pressing tongs according to the invention, since this not only serves to apply a force or a moment for pivoting the positioner, but at the same time forms at least one Abstützort for a spring element. This spring element can serve to act on the positioner in the direction of a position, preferably the working position.

For a further proposal of the invention, the hand lever carry out a movement in a plane with the pressing stroke of the pressing tongs, which preferably corresponds to the tongs head plane or is oriented parallel thereto. In the working position of the positioner, the arm forms an acute angle with respect to the aforementioned plane. For a transfer of the positioner from the working position to another position, in particular the attachment position, the arm is pivoted in the direction of the plane. Such pivoting can be done for example by the index finger or middle finger of the pressing tongs holding hand.

In the case of the pressing tongs according to the invention, the positioner is preferably secured or securable in the working position via a latching device or a blocking device.

In this context, a locking device is understood to mean a device which holds the positioner in the vicinity of the working position or in the latter itself for small-acting forces on the positioner and arm or extension arm, while the positioner can be moved away from the working position for forces acting in an enlarged manner. Examples of such a latching device are a spring-loaded latching ball which engages in the working position in a corresponding latching groove, which can be specified via the diameter design of the detent ball, the geometry of the groove and the stiffness of the detent ball spring supporting the forces that are required move the positioner out of the working position. Accordingly, a locking pin can be used. Also possible is the use a magnet as a latching device, wherein on the strength of the magnetic force, the latching force can be specified in the working position and an automatic closing movement can be brought about by a surrounding area of the working position.

By contrast , a locking device is understood to mean a device which can not be released merely by applying forces in the direction of the pivoting degree of freedom of the positioner. Rather, preferably in the locking device, a positive securing the working position with or without clearance, including, for example, a locking pin or a pawl can be used. The locking device can be released from the same hand or the second hand of the user or be solved by additional actuators or by movement of the actuator in the direction of another degree of freedom than the pivoting degree of freedom of the positioner. (Accordingly, it is within the scope of the invention also possible that the positioner is secured in a position deviating from the working position, for example, the plug-on position, via a locking device or a locking device or is securable.)

While it is also possible that a specification of a maximum pivot angle of the positioner relative to the pliers head is determined by the positioning of the positioner relative to the pliers head or other attacks, the arm or boom in addition to the function of transmitting actuation forces and possibly the support of a spring element also serve to limit the maximum pivoting of the positioner. This can be achieved in a particularly simple manner if the arm or outrigger is arranged and designed in such a way that it comes to bear against a further component of the pressing tongs in order to achieve the maximum pivoting angle of the positioner.

In a further embodiment of the pressing tongs according to the invention, the actuating member, in particular the arm or arm, is designed and arranged such that it can be actuated by a hand lever enclosing the right hand of the user of the pressing tongs, but also by a hand lever surrounding the left hand of the user of the pressing tongs can be actuated. In this way it can be ensured that the pressing tongs can be used with the actuator according to the invention of a right and left-handed and / or in different installation conditions.

Furthermore, the invention proposes to form the pressing tongs with a kind of modular positioner, for which the positioner and / or the arm or arm can be connected as an equipment variant with the other components of the pressing tongs / are. Thus, a first group of pressing tongs can be manufactured, sold and used without positioner and / or arm or cantilever, while for a second group of tongs the additional module is equipped with the positioner and / or the arm or cantilever that for the second group of ease of use may be increased. It is also possible that an existing crimping tool is optionally retrofitted with a positioner and / or an actuator or arm or equipped depending on the application.

The inventive arrangement of the pivot axis of the positioner can be used with the actuating mechanism, for example, both for a C-shaped open pliers head as well as for an annular closed pliers head. Also, the type of drive of the pressing tongs and the movement of the tool parts relative to each other irrelevant to the positioner. It is as it creates a universal positioner, which can be attached to pliers of various kinds and which is also suitable to be replaced on different pliers. Due to the orientation of the pivot axis and the number and arrangement of the nests on the tool in the pliers head is independent of the positioner. In particular, it is possible to increase the number of nests for a given requirement. The number of nests only has to match the number of pick-up points on the positioner or be aligned in the working position. Another advantage of the new positioner is that it provides a comparatively improved accessibility and good handling in the slip-on. It allows the easy and safe plugging even very small workpieces in the relevant receiving point, which may be formed as a depression or as a projection on the positioner. Another advantage of the new positioner is that it does not hinder the conversion of the pressing tongs to other tools or tool sizes. The positioner is also easier to replace, as required when changing tools. The invention can be used for pressing tongs of different design, in which, for example, the movable tool part is guided linearly or on a circular path in the pliers head.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and combinations of several features mentioned in the introduction to the description are merely exemplary and can take effect alternatively or cumulatively, without the advantages of compelling embodiments of the invention must be achieved. Further features are the drawings - in particular the illustrated geometries and the relative dimensions of several components to each other and their relative arrangement and operative connection - refer. The combination of features of different embodiments of the invention or of features of different claims is also possible deviating from the chosen relationships of the claims and is hereby stimulated. This also applies to those features which are shown in separate drawings or are mentioned in their description. These features can also be combined with features of different claims. Likewise, in the claims listed features for further embodiments of the invention can be omitted.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

zeigt einen Zangenkopf einer bekannten Presszange der Anmelderin mit der Typenbezeichnung CS20KS.

Fig. 2

zeigt einen Zangenkopf einer weiteren bekannten Presszange der Anmelderin mit der Typenbezeichnung CS25KS.

Fig. 3

zeigt eine Ansicht einer weiteren, aus DE 198 32 884 C1 bekannten Presszange mit ringförmig geschlossenem Zangenkopf.

Fig. 4

zeigt einen Schnitt gemäß der Schnittlinie IV-IV in Fig. 3 durch den Zangenkopf mit geschnitten dargestelltem Positionierer.

Fig. 5

zeigt eine Schnittdarstellung der Schwenkplatte des Positionierers gemäß der Schnittlinie V-V in Fig. 3.

Fig. 6

zeigt eine Schnittdarstellung der Befestigungsplatte des Positionierers.

Fig. 7

zeigt eine ähnliche Darstellung wie Fig. 4 mit der in die Aufsteckstellung aufge- klappten Schwenkplatte.

Fig. 8

zeigt eine ähnliche Darstellung wie Fig. 4 und 7 mit der in die Arbeitsstellung ge- klappten Schwenkplatte.

Fig. 9

zeigt eine erfindungsgemäße Presszange in räumlicher Darstellung mit einem klappbaren, mit einem Arm ausgestatteten Positionierer in der Arbeitsstellung.

Fig. 10

zeigt eine gegenüber Fig. 9 vergrößerte Ansicht.

Fig. 11

zeigt die erfindungsgemäße Presszange gemäß Figuren 9 und 10 in räumlicher Darstellung in einer Aufsteckstellung.

Fig. 12

zeigt eine gegenüber Fig. 11 vergrößerte Ansicht.

Fig. 13

zeigt eine räumliche Einzelteilansicht eines Armes oder Auslegers für eine erfindungsgemäße Presszange.

In the following the invention will be further explained and described with reference to preferred embodiments shown in the figures.

Fig. 1

shows a pliers head of a known crimping pliers of the applicant with the type designation CS20KS.

Fig. 2

shows a pliers head of another known crimping pliers of the applicant with the type designation CS25KS.

Fig. 3

shows a view of another, from DE 198 32 884 C1 known pressing pliers with annular closed pliers head.

Fig. 4

shows a section along the section line IV-IV in Fig. 3 by the pliers head with cut represented positioner.

Fig. 5

shows a sectional view of the pivot plate of the positioner according to the section line VV in Fig. 3 ,

Fig. 6

shows a sectional view of the mounting plate of the positioner.

Fig. 7

shows a similar representation as Fig. 4 with the swivel plate opened in the slip-on position.

Fig. 8

shows a similar representation as Fig. 4 and 7 with the swivel plate folded into the working position.

Fig. 9

shows a pressing tongs according to the invention in a spatial representation with a hinged, equipped with an arm positioner in the working position.

Fig. 10

shows one opposite Fig. 9 enlarged view.

Fig. 11

shows the pressing tongs according to the invention according to Figures 9 and 10 in a spatial representation in a slip-on position.

Fig. 12

shows one opposite Fig. 11 enlarged view.

Fig. 13

shows a partial spatial view of an arm or jib for a pressing tongs according to the invention.

DESCRIPTION OF THE FIGURES

Fig. 3 shows a view of a pressing tongs 1 with an annular closed pliers head 2 in plate construction, which has two identical in shape cover plates 3 and 4. The cover plates 3 and 4 are generally symmetrical with respect to a pliers head plane 5 (FIG. Fig . 4 ) arranged. The pliers head plane 5 is determined by the two main directions of extension of the pliers head 2. In Fig. 3 forms the pliers head plane 5 at the same time the plane of the drawing.

In the pliers head 2, two tool parts 6, 7 are arranged, which together form a tool. The tool part 6 is fixedly mounted in the pliers head 2, while the tool part 7 is arranged to be relatively movable. The tool part 7 is guided here linearly with the aid of the frame-shaped closed cover plates 3, 4. One can imagine the tool parts 6 and 7 as mutually associated pressing dies, with which it is possible to permanently deform a workpiece 8 in a pressing operation, for example to produce a crimped connection. For this purpose, however, the workpiece 8 previously in a precisely defined relative position to the Tool parts 6 and 7 are brought. For this purpose, a positioner 9, which is mounted with a pivot bearing 10 with pivot axis 11 pivotally mounted on the pliers head 2. The pivot bearing 10 is designed and arranged such that its pivot axis 11 is located in a plane 12 which is parallel to the pliers head plane 5 (FIG. Fig. 4 ) is arranged. As a rule, the plane 12 lies at some distance parallel to the pliers head plane 5. However, it can also coincide with the pliers head plane 5.

In detail, the positioner 9 has a mounting plate 13, which is connected by means of a screw 14 to a part in the pliers head 2, which is on the one hand with the movable tool part and on the other hand with a drive 15 in connection. As a drive 15, two levers 16 and 17 are used, which are mounted in a known manner on the pliers head 2 pivotally relative to each other and drive the movable tool part 7 linearly in the main direction of the pressing tongs 1.

The positioner 9 has, in addition to the mounting plate 13, a pivot plate 18. The pivot plate 18 is pivotally connected to the mounting plate 13 via the pivot bearing 10, so that the pivot plate 18 can be pivoted about the pivot axis 11 (see. Fig . 7 and 8th ).

The pivot plate 18 ( Fig. 5 ) has on its side facing away from the pliers head plane 5 a projecting bolt 19, which serves to facilitate gripping the pivot plate 18 for performing a pivoting about the pivot axis 11. On its other, so the pliers head 2 facing side, the pivot plate 18 has at least one receiving location 20th Fig. 3 allows three receiving points 20 side by side on the positioner 9 and the pivot plate 18 recognize. The receiving points 20 are assigned to three nests on the tool parts 6 and 7 and determined, for example, for different diameters of workpieces 8. Each receiving point 20 is formed here as a recess in the back 21 of the pivot plate 18. But it is also possible, the receiving point 20 on the positioner 9 and the pivot plate 18 as a projection, in particular as a projecting pin form, to a z. B. sleeve or tubular workpiece 8 aufzustecken here.

Fig. 5 shows in a sectional view, the pivot plate 18 of the positioner 9. The pivot plate 18 may be formed in particular as a plastic molding or as a metal molding. It has in the lower part for the realization of the located on the pivot plate 18 parts of the Swivel bearing 10 preferably a plurality of projections 22 with open-edged recesses 23, with the aid of which they can be detachably attached to a bolt 24, which on the mounting plate 13 (FIGS. Fig. 6 ) is provided and stored. The bolt 24 and the open-edged recess 23 are provided in the mounted position with jointly aligned pivot axis 11. In the lower part of the back 21 of the pivot plate 18, a magnet 25 is mounted, which in the working position ( Fig. 4 and Fig. 8 ) compliantly secures this job. The compliance, so the ability of locking the working position for the pivot plate 18, is useful if an elongation of the workpiece 8 occurs in the process, the bill must be taken. It can thus pivot the pivot plate 18 slightly and allow this elongation of the workpiece 8 during the pressing process without the workpiece 8 is pressed in an inadmissible manner or otherwise adversely affected. It is understood that the magnet 25, which acts between the pivot plate 18 and the mounting plate 13, could also be arranged on the mounting plate 13. Since the mounting plate 13 may be formed as a plastic molding or metal molding, this suitably has a bore 26 into which in the mounted position a steel pin 27 (FIG. Fig. 4 ) engages, which cooperates with the magnet 25. The steel pin also has the task of supporting the mounting plate 13 together with the screw 14 against rotation on the pliers head. Instead of using a magnet 25 or in addition to such a magnet 25, the pivot plate 18 may have on its rear side 21 one or more cylindrical projections 28 which engage in holes not shown in the mounting plate 18 in the working position and engage. This measure can serve to eliminate an occurring in the realization of the pivot bearing 10 and / or by frequent use of the positioner 9 magnifying game in the pivot bearing 10 in the working position and in this way the working position of the positioner or the pivot plate 18 with to stabilize the inserted workpiece 8.

In comparison of the Fig. 7 and 8th can be seen that the pivot plate 18 from the receiving position ( Fig. 7 ) into the working position ( Fig. 8 ) is pivotable about a pivot angle 29 about the pivot axis 11 of the pivot bearing 10. The swivel angle 29 should be at least 75 °. It is better if the pivoting angle 29 is more than 90 °, for example about 120 °, as in Fig. 5 shown. The pivot angle 29 is limited by a stop 30, which is formed by the cover plate 3 and to the one edge or corner of the pivot plate 18 in the Aufsteckstellung ( Fig. 7 ) strikes. The stop 30 simultaneously forms an abutment for the pivot plate 18, so that the pivot plate 18 in the Aufsteckstellung ( Fig. 7 ) is fixed and the workpiece 8 can be inserted accurately in the selected receiving location 20. The insertion or insertion of the workpiece 8 in the receiving position 20 by hand, wherein the workpiece 8 is usually held and guided between the thumb and forefinger. As a workpiece 8 is in Fig. 7 a connector shown, as it is needed in a crimp connection with a partially stripped electrical conductor, while two crimp connections must be made, namely once with the isolation of the electrical conductor and the other with the metal core of the electrical conductor.

Fig. 8 shows the relative position of the parts before initiating such a processing step or crimping. It can be seen that the pivot plate 18 of the positioner in accordance with the pivot angle 29 from the attachment position Fig. 7 according to the working position Fig. 8 has been pivoted. The workpiece 8 in the form of the connector is thus positioned in exact position relative to the movable tool part 7. The axis of the workpiece 8 and the axis of the movable tool part 7 are aligned with each other. From the Fig. 7 and 8th it can be seen that the workpiece 8 is positioned from the one side into the pliers head 2 in the direction of the pliers head plane 5 perpendicular to the working position. From the other side of the pliers head 2, ie relative to the pliers head plane 5, an electrical conductor 31 is now inserted with its stripped metal core 32 until the end face of its insulation 33 abuts a positioning stop 34. The positioning stop 34 can be designed as a platen head 2 against spring force displaceable thin plate, as is well known. The positioning stop 34 only serves to establish the correct intended position of the electrical conductor 31. The positioning stop 34 has no significance for the positioning of the workpiece 8 in the pliers head during the working position. Of course, the positioning stop 34 is also matched to the relative position of the workpiece 8 in the working position in the pliers head. But you recognize it Fig. 8 in that the axes of the workpiece 8 or the receiving location 20 and the axis of the electrical conductor 31 are provided at a distance from each other. This is the case during the open position of the pressing tongs 1. When performing the operation, so for example, a crimping operation, the movable tool part 7, in which the positioner 9 sits with its pivot plate 18, straight upwards, ie in the direction of the stationary arranged in the pliers head 2 tool part 6, moves, so that the both from the drawing representation apparent staples of the workpiece designed as a connector 8 once around the metal core 32 and on the other to the insulation 33 around. By the common step of crimping both compounds produced. After completion of the work or crimping process, the conductor 31 is connected to the workpiece 8 and remains when opening the pressing pliers in its relative position to the movable tool part 7, so that the totality of conductor 31 and workpiece 8 against the insertion movement of the electrical conductor 31 relative can be removed to the pliers head plane 5. After pivoting the pivot plate 18 of the positioner 9 in the Aufschwenkstellung according to Fig. 7 a new workpiece 8 can be used and the operation can then be repeated. The described embodiment according to Fig. 3 to 8 is (in addition to other embodiments that can be combined with the features of the invention) in DE 198 32 884 C1 described.

In the Fig. 9 to 12 an exemplary embodiment of a pressing tongs according to the invention is shown, wherein the embodiment according to the Fig. 3 to 7 Corresponding components are identified by the same reference numerals with the addition of the letter a.

Here, the positioner 9 a is equipped with a boom or arm 35, which as a single part in Fig. 13 is shown. For the illustrated embodiment, the arm 35 is formed as a shaped sheet metal part with a constant wall thickness. The arm 35 is formed with a connecting portion 36 and a tab 37 projecting from the connecting portion. The tab 37 is flat with a U-shaped outer contour. The tab 37 is oriented with respect to the pliers head plane 5 at an acute angle 41, wherein the angle 41 is preferably 60 ° to 85 °, in particular 70 ° to 80 °, for example approximately 75 °. The connecting portion 36 is formed with a strip of approximately constant width, which is angled U-shaped with a base leg 38 and two parallel side legs 39, 40. The base leg 38 has an approximately semi-circular recess 42 and two edge-closed or, as in Fig. 12 The side legs 39, 40 are extended downwards with rod-shaped extensions 45, 46, which are angled in their side arms 39, 40 facing away from each other end portions 47, 48 by 90 ° to each other, wherein the in Installation state aligned with the pivot axis 11a-11a are oriented.

The arm 35 is attached to the positioner 9a from the outside, the bolt 19 entering the recess 42 and the rear side of the base leg 38 coming into contact with the outside of the positioner 9a, while the side legs 39, 40 of the arm 35 are the positioner 9a grip around the side. Such as in Fig. 10 can be seen, there is a firm connection between the arm 35 and positioner 9a in that two screws 49, 50 are screwed through the recesses 43, 44 in threaded holes of the positioner 9a. The end regions 47, 48 each serve to support one of a spring element 51, here a spiral or leg spring. The spring element 51 has two legs, which are pivoted to produce a torsional force of the spring element 51 to each other. A leg 52 extends parallel to the extension 46 upwards and extends for the purpose of securing against the arm 35 in an angled end portion in a bore 53 in the side legs 40. The other leg of the spring member 51 is supported in a manner not shown on the pressing pliers 1a , For example, on the cover plate 3a, the mounting plate 13a or the pliers head 2a, from. The spring element 51 is biased so that this the positioner 9a with arm 35 in the direction of Fig. 10 shown working position and can secure in this, which can be done in addition to a fuse by the magnet 25.

As in Fig. 10 can be seen, the tab 37 extends at an angle of 60 ° to 85 °, in particular 70 ° to 80 °, for example about 75 °, to the pliers head plane 5a, wherein the tab 37 is slightly inclined in the direction of the hand lever 16a, 17a , If a user's hand is placed on the hand levers 16a, 17a or if this includes the hand levers 16a, 17a, then the user can use a finger, preferably the index finger or middle finger, from outside according to Fig. 10 apply an actuating force to the tab 37, so that the tab 37 can be used in one-handed operation as an actuator 54. With such an operation, a user-controlled force and a moment can be exerted on the positioner 9 a, which is based on a pivoting of the positioner 9 a from the working position Fig. 9 in the slip position according to Fig. 11 is directed, which is possible in one-handed operation. With reduction or elimination of the actuation force, the spring element 51 again closes the positioner 9a or pivots it back into the working position. A limitation of the pivoting movement, that is, preferably a specification of the position of the slip-on position, can deviate from the embodiment according to FIG Fig. 3 to 7 , Made by the fact that the tab 37 comes with its bottom to rest against another component of the pressing tongs 1a. For the illustrated embodiment, this device is designed as part of the drive 15 or as a pivot pin of the drive 15. The end regions 47, 48 thus form Abstützorte 55, 56 for the spring element 51st

LIST OF REFERENCE NUMBERS

1

crimping pliers

2

pliers head

3

cover plate

4

cover plate

5

Pliers head level

6

tool part

7

tool part

8th

workpiece

9

positioners

10

pivot bearing

11

swivel axis

12

level

13

mounting plate

14

screw

15

drive

16

hand lever

17

hand lever

18

swivel plate

19

bolt

20

receiving location

21

back

22

head Start

23

recess

24

bolt

25

magnet

26

drilling

27

steel pin

28

head Start

29

swivel angle

30

attack

31

ladder

32

metal core

33

insulation

34

positioning

35

poor

36

connecting area

37

flap

38

base leg

39

side leg

40

side leg

41

angle

42

recess

43

recess

44

recess

45

extension

46

extension

47

end

48

end

49

screw

50

screw

51

spring element

52

leg

53

drilling

54

actuator

55

support location

56

support location

Claims (11)

1. Crimping pliers (1) for crimping a work piece (8) comprising

   a) two hand levers (16, 17) being movable relative to each other for producing a crimping movement and being manually actuatable and

   b) a locator (9) being pivotable relatively to a pliers head (2) around a pivoting axis (11), which

   aa) has an orientation parallel to a pliers head plane (5) and

   ab) having an orientation transverse to the moving direction of tool parts (6, 7) of the crimping pliers (1)

   characterised by

   c) the locator (9) being linked or cooperating with an actuating means (54) wherein with an actuation of the actuating means (54) a pivoting movement of the locator (9) relative to the pliers head (2) is directly or indirectly caused,

   d) wherein the actuating means (54) is arranged and designed such that the actuating means (54) is actuatable by a hand of the user of the crimping pliers enclosing the hand levers (16, 17).
2. Crimping pliers (1) of claim 1, wherein the actuating means (54) is built with an arm (35) or beam of the locator (9).
3. Crimping pliers (1) of claim 2, wherein the arm (35) is built by a metal sheet.
4. Crimping pliers (1) of claim 2 or 3, wherein the arm (35) or metal sheet builds at least one supporting location (55, 56) for a spring element (51).
5. Crimping pliers (1) of claim 3 or 4, wherein the metal sheet comprises an extension (45, 46) with end regions (47, 48), wherein the extension builds a bearing axis for a spring element (51).
6. Crimping pliers (1) of one of claims 2 to 5, wherein

   a) the hand levers (16, 17) move in a plane during the crimping stroke of the crimping pliers (1),

   b) in a working position of the locator (9) the arm (35) builds an acute angle with respect to the plane and

   c) with the transfer of the locator (9) from the working position into an insertion position the arm (35) is pivoted towards the plane.
7. Crimping pliers (1) of one of claims 1 to 6, wherein the locator (9) is biased by a spring element (51) towards the working position.
8. Crimping pliers (1) of one of claims 1 to 7, wherein the locator is secured or securable in the working position by a latching device or locking device.
9. Crimping pliers (1) of one of claims 2 to 8, wherein the maximum of the pivoting angle of the locator (9) is limited by the arm (35) or beam establishing a contact at another part of the crimping pliers (1).
10. Crimping pliers (1) of one of claims 1 to 9, wherein the actuating means (54) is designed and arranged such that the actuating means (54) is actuatable by the right hand of the user of the crimping pliers (1) enclosing the hand levers (16, 17) but also actuatable by a left hand of the user of the crimping pliers (1) enclosing the hand levers (16, 17).
11. Crimping pliers (1) of one of claims 1 to 10, wherein for an optional configuration the locator (9) and/or the arm (35) or beam is linkable with other parts of the crimping pliers (1).

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