EP2995424A1 - Pliers - Google Patents

Abstract

The invention relates to a hand tool (1), which is in particular a pressing tongs. According to the invention, the hand tool (1) is equipped with a counting device (16) which counts the number of working strokes (17) that have passed through. The counting device (16) is formed with a sensor which detects the distance or travel of two components moving relative to one another via the working stroke (17), in particular the distance or way of hand levers (2, 3). If the count determined by the counter (16) exceeds a threshold value, a display may be generated on a display device of the hand tool (1) indicating that replacement of drive elements or replacement of dies or certification of the hand tool must occur.

Description

TECHNICAL FIELD OF THE INVENTION

The invention relates to a hand tool, which may be any non-power-operated, but manually operated by a user pliers. Here, the pliers can be operated in one-handed operation or two-hand operation. To name just a few examples, it may be in the pliers to a cutting pliers, a crimping pliers or crimping pliers (especially crimping pliers for sealing pressing of pipe joints), hole pliers u. act. In the following, for ease of description, reference will be made, in part, to a crimping tool, without this being intended to limit the invention to this type of crimping tool.

STATE OF THE ART

According to the document DE 10 2007 050 176 A1 The increasing complexity of wire harnesses, stricter product liability and increased warranty requirements require quality assurance by monitoring a pressing force in making a press fit. It is proposed to equip a pressing tongs with a force measuring device, which is designed as a piezoelectric force sensor or strain gauges. The force measuring device is arranged on the outside of a press ram or within a press ram or in a press receptacle. The pressing tongs are equipped with a transmitter, which is mounted above the press ram on the pressing tongs head. The transmitter emits a wireless press force signal, which is received and evaluated by an external receiving and evaluation device. The transmitter can be switched on and off via control elements. Furthermore, the frequency of the transmitter can be specified via the operating elements. In the transmitter, an energy source in the form of an electric battery or a rechargeable battery for powering the transmitter and the force measuring device is integrated. It is also possible that the transmitter has an induction coil in which an external magnetic field can generate an induction current to recharge the accumulator. It is also possible to equip the crimping pliers with a solar cell, via which alternatively the recharging of the accumulator can take place. But also possible is the power supply of the force measuring device and the transmitter via a temporary cable connection. The pressing tongs has a display device to which a pressing force, a transmission frequency, an indication of the existence of a wireless connection, a state of charge of the accumulator u. Ä. can be displayed. In this case, the display device can be designed as an LED or LCD display device. In addition, a displacement measuring system for detecting the working stroke of the pressing tongs can be provided on the pressing tongs. To avoid damage, the pressing tongs may have a ratchet device or a slipping clutch which limits the applicable pressing force to a predetermined value. The receiving and evaluating device can be designed, for example, as a commercially available PC with a Bluetooth receiver. It is also possible to use a database in which received signals are stored in order to reliably and permanently document the quality of the produced press connections.

The publication DE 298 06 179 U1 also describes measures for documenting a progression of a pressing force as a function of a pressing path. In this case, both the pressing force and the pressing travel in the region of the mouth of the forceps or in an intermediate part of a lever drive of the pressing tongs are measured. An evaluation circuit can be provided on the pressing tongs with a suitable display for displaying information about the quality of the pressing process. The pressing tongs may have a data memory in which force-displacement profiles can be stored for different types of press-fit connections, in particular different contact types. As a visual display device, a light-emitting diode display or a liquid crystal display can be used. In addition, a signal output via an acoustic display device. By means of different colors or tones of the display device, different information on the quality of the press connection produced and the pressing force-press path progression can be transmitted. As an interface for a stationary computer, a wired or optical interface or any possible air-transmitted interface, which uses electromagnetic radiation in the visible, infrared or radio range, proposed, whereby a bidirectional interface can be used. An evaluation of the pressing force curve can be made by comparison with a predetermined pressing force curve, if necessary with a predetermined tolerance range, done. Furthermore, it is proposed to detect both the pressing force and the pressing path in each case via a force sensor, wherein the pressing path is converted via a spring loaded via the pressing path into a force which is then detected via the force sensor.

The publication DE 10 2004 009 489 B4 discloses the assistance of a setting operation of a pressing stroke depending on the workpiece to be pressed by a sensory detection and electronic processing of the position of press dies.

The publication DE-OS2 316 769 describes a non-generic pressing machine in which a counter the number of executed strokes should be read without explaining how the number of strokes is recorded and for what purpose the counter should be displayed.

DE 297 03 052 U1 describes accordingly a counting memory for recording the number of performed pressing in a non-generic pressing machine with electric drive. An indication of the number of compressions performed should alert an operator to the achievement of a maintenance interval. After a maintenance performed then the count is to be deleted again, which then the counting procedure should start again.

OBJECT OF THE INVENTION

The invention has for its object to propose a pair of pliers with advanced options in terms of monitoring the proper operation of the pliers.

SOLUTION

The object of the invention is achieved with the features of the independent claim. Further preferred embodiments according to the invention can be found in the dependent claims.

DESCRIPTION OF THE INVENTION

The invention is based on the finding that although the monitoring of an actuating force of a pliers, in particular a pressing force, or the monitoring of a PresskraftPressweg-course can be advantageous in terms of ensuring a desired result of machining a workpiece by the hand tool. However, this assumes that the hand tool, in particular its drive mechanism and its dies, are in perfect condition. But if, for example, a wear of a die of the pliers occurred or has a bearing clearance of the drive mechanism changed, the work result of the pliers may differ from the desired result, even if u. U. the prescribed press force profile has been brought about. In order to avoid interference with the working results of a pair of pliers, regular calibrations or checks of the condition of the pliers are carried out. This can also be done in the manner of a "TÜV" a regular certification of the condition of the hand tool, which takes place, for example, monthly or annually. This is the case, in particular, for manual tongs, which are intended to ensure a high quality of the work result, as is the case, for example, with manual tongs for tube pressing or hand tongs for pressing connecting elements in the aerospace industry. The disadvantage of such regular certifications, however, is that the intervals of the certification do not necessarily correlate with the actual extent of use of the hand tool. For example, it is possible that a hand tool from the production to the first use at a customer has experienced longer delivery times or was also stored at the customer before their first use for a long period of time, which then a regular first certification would take place too soon. Furthermore, the frequency of use of the same hand tools with different customers or even different employees of the same customer may be different, so that when choosing the intervals for the certification according to the highest frequency of use unnecessary certification effort may arise or to reduce unnecessary certification effort staff or customer-dependent intervals would be set.

According to the invention, it is proposed that a hand-held pliers of the type described above be equipped with a counting device by means of which the working strokes passed by the manual pliers are counted. The invention is based on the surprising finding that the use of a counter, as is well known for complex presses with a power-operated drive such as an electric drive, is also possible for a hand tool, which in terms of equipment costs and the usual Dimensions, the clock numbers and the drive deviates seriously from a pressing machine. While in press machines detection of the pressing force and u. U. also a counting of work strokes is trivial, since in the pressing machine anyway a drive signal, for example, for the energization of the drive unit is present, which can be evaluated for the determination of the pressing force or counting of working strokes, this is not the case for a hand tool. According to the invention, the counting device of the hand tool is not (exclusively) based on the detection of a pressing force via an actuating force or pressing force or on the evaluation of the drive movement of a drive of a pressing machine, in particular the electrical power consumption and the control signal of an electric drive. Rather, in the hand tool according to the invention, the counting device has a sensor which detects the distance between two components of the hand tool, which are moved relative to one another via the working stroke. For example, the sensor may detect the distance of hand levers, jaws or any components of the drive mechanism whose motion correlates with passage of the power stroke. Thus, according to the invention, it is not a force sensor which is used, but a displacement or distance sensor, which has proved to be advantageous with regard to the integration into a hand tool, the installation space conditions, the robustness, the costs and the reliability. In this case, the sensor can detect the distance over the entire working stroke or a part of the working stroke, preferably in the initial region of the working stroke or in the end region of the working stroke, whereby the detection, provision and / or processing of a signal provided by the sensor continuously, digitally or ( in the manner of a switch) can be binary.

Within the scope of the invention, any distance sensor can be used. This can be designed as a contact sensor or as a contactless sensor. For example. may include a capacitive sensor, an inductive sensor, an eddy current sensor, a Hall sensor, a reed sensor or switch, a magnetoresistive sensor, a magnetostrictive sensor, an optical laser, a confocal sensor, an interferometer sensor, an ultrasonic sensor u. Ä. Be used, without the invention being limited to the use of one of the sensor types mentioned.

In principle, the counter can be integrated into any components of the hand tool. For example, it is possible that the counter is arranged in the region of a pliers head of the hand tool. For a particular proposal of the invention, the counter is integrated in the hand lever of the hand tool, including the integration at least a module of the counter at least partially subsumed in at least one hand lever.

It is possible that the hand lever of the hand tool provide a large installation space in this direction in view of their large extent in the longitudinal direction. On the other hand, the hand lever usually perform a greater movement over the power stroke than, for example, the jaws, so that when detecting the distance of the hand lever to count the traversed strokes a relatively coarse measuring sensor device can be used or a high accuracy can be achieved. It is also possible that two modules of the counter are respectively arranged on the mutually facing sides of the hand lever or integrated into it, whereby these relatively far approach or even touch at the end of the working stroke, bringing the variety of usable sensors u. U. is increased. It is also possible that at least one module protrudes from a hand lever in the direction of the other hand lever to reduce the distance of the respectively associated with the two hand lever modules, and / or that the hand lever (or both hand lever) a bend, a web or extension in Has direction of the other hand lever, in which the module is integrated while reducing the distance to the other hand lever. In extreme cases, over a partial stroke or the entire stroke of the hand lever, the bend, the web or extension and thus also the module through a recess of the other hand lever extend through, then in the region of the recess, the other module is integrated into the other hand lever and the two modules interact with each other to generate the measurement signal. Another advantage of the integration of the counter in the hand lever of the hand tool can be that usually the pliers head is exposed to harsher operating conditions than the hand lever of the pliers, so here u. U. sensitive counting device is not easily damaged. In addition, a protection of the counter can be done by the hand lever of the hand tool with integration of the counter in the same.

In a particular embodiment of this solution thought of the hand lever can be formed in plate construction. In this case, the counter, in particular at least one module thereof, is received (at least partially) between plates of the hand lever. This solution idea combines the advantages of the design of the hand lever in plate construction (in particular, a cost-effective production, a stiff, yet compact design and the possibility of training of bearing eyes in the plates with Holes of the plates or bearing bolts held in the plates) with the simple provision of a receiving space of the module of the counter between the plates while protecting the module through the plates.

According to a further proposal of the invention, a module of the counter is integrated in a casing of a hand lever made of plastic or at least partially covered by the sheath made of plastic. This refinement can make use of the knowledge that a measuring principle of the sensor is not disturbed (essentially) by a casing made of plastic or partially covering, but the plastic casing or the at least partial cover can provide protection of the module of the counting device. In addition, by integrating the module of the counter, a kind of block of the module can be formed with which individual components of the module are fixed relative to one another.

It is possible that the counter works independently. It is also possible that the counter cooperates via non-contact connections with external devices for power supply and / or data transmission. For a further proposal of the invention, the counter is equipped with a connection. This can serve the power supply during operation of the hand tool. Alternatively or cumulatively, it is possible that recharging of a rechargeable battery takes place via the connection. Furthermore, it is possible that a change in the operating conditions of the counter is possible via the connection. It is also possible that the connection is used as a data transmission device, by means of which operating data of the hand tool or the current count of the counter, if necessary with additional information such as frequencies of the passage of a working stroke on a working day, date and time of a working stroke or other measured values how actuating forces, pressing forces, pressing force-Pressweg-courses are transmitted.

It is possible that the components of the counter are formed with individual components or modules which are spaced from each other and communicate with each other, for example via cable. In a further embodiment of the invention it is proposed that the counter is formed with a module (or is formed with two modules, which are each assigned to a hand lever). In the module or one of the modules, a control unit, at least one line connection in the form of a Cable, a board, a transmitter, a receiver, a display device, a battery or an accumulator and / or a connection for a power supply and / or data transmission to be integrated. In such a module then the said components are encapsulated with a suitable material, such as synthetic resin or any flowable or pasty and thermosetting material, into a kind of block. Such a potted module can then be stored and provided as semi-finished in the production of the hand tool. Susceptible wiring or other components may be protected by potting the module against mechanical damage, dirt, moisture or shock. It is also possible that the assembly of the module is simplified with the other components of the hand tool by the module as a whole in operative connection with the component to which it is to be mounted, or brought into a specific recess thereof or introduced and then as Whole is attached. It is unnecessary u. U. also several separate fasteners of the control unit, the line connections, the board, the transmitter, the receiver, the display device and / or the battery or the accumulator. UU also disassembly of such a molded module as a whole is facilitated and simplified the replacement of a repair or replacement module or a module of another type.

It is entirely possible that the display of a count and information derived therefrom only via an external display device. For a hand tool according to the invention, however, a display device is provided on the hand tool itself, by means of which the number of working strokes or information dependent thereon can be displayed. For example, the information dependent on the number of working strokes passed is the information as to whether a threshold for the number of working strokes has been reached.

In principle, any embodiments of the display device are possible. For a proposal according to the invention, the display device is formed with at least one LED, which can indicate, for example, depending on the operating condition (in particular by operation / non-operation of the LED or operation of the LED with different colors), whether a threshold for the number of working strokes has been reached or the Hand tool is ready for use or certification is required.

The evaluation of the result of the counter can be arbitrary. For a proposal of the invention, the counter has a control unit. The control unit is equipped with a control logic, based on the counted strokes an evaluation of wear of the hand tool, in particular a die or the drive mechanism makes. Depending on the result of this evaluation, a maintenance, repair or just a certification or examination can then take place.

In development of this idea, the user can also be given quite different information. For this purpose, the control unit of the counter is equipped with control logic which compares the number of strokes detected by the counter with a first threshold. When the first threshold value is exceeded, the control unit activates the display device to generate a first display. In addition, the number of strokes detected by the counter is compared to a second threshold (which is different from the first threshold). When the second threshold value is exceeded, the control unit activates the display device to generate a second display. It is quite possible that in addition to the comparison with a third, fourth ... Threshold takes place with the generation of a third, fourth ... display.

This will be explained with reference to the following non-limiting example: It is possible that prior to the actual commissioning of the hand tool, the hand tool, for example, in the context of quality control at the manufacturer, some workhops must be completed. Thus, the first threshold may correlate with the number of these strokes prior to startup. When the first threshold value is exceeded, it can be indicated by means of the first display that the hand tool is ready for operation. If an adjustment of the use of the pliers, certification or testing, maintenance or replacement of a die or other component after N strokes, a second threshold corresponding to the number N can be selected. When this second threshold value is exceeded, the second indication indicates to the user that the operation of the hand-held pliers must be stopped or certification is required. In the event that the user is not to be surprised by this request to discontinue operation, a third threshold may be defined which is less than said second threshold, for example 5 or 10% less than this. Upon reaching this third threshold value can then with a third display to the user be indicated that an early setting of the operation of the pliers is required and only a limited number of work strokes should be carried out with this.

The different displays can in different colors of an LED, driving different LEDs, the change from a continuous operation of an LED, for example as a third display to a flashing operation of the same LED as the second display u. Ä. exist.

In a further embodiment of the invention, the counter has a reset device. These can be used to reset the current count of the working strokes to zero or a specified value. By way of non-limiting example, the counter can be used to ensure that the dies are used only with a defined number of strokes to avoid excessive wear of dies. If a premature replacement of the dies or the replacement of dies after passing the predetermined maximum number of strokes, the counter should also be used for a new pair of dies, which is made possible by resetting the count by means of the reset device. In this case, the reset device can be actuated by a switch, knob or sensor, which is freely accessible on the hand tool, for example on an inner side of a hand lever. If the unintentional actuation of the reset device is to be avoided, it may be advantageous if the reset device is covered by a cover or a flap or is arranged in an accessible manner behind a projection or in a depression. It is also possible that a reset device is used, which can only be actuated via a special tool or via an electrical reset signal.

It is quite possible that the threshold values with which a comparison of the number of working strokes determined by the counter takes place are predetermined, whereby different threshold values are used, depending on the type of hand tool, the drive mechanism used and / or the workpiece processed with the hand tool can come. In a further embodiment, the invention proposes that the control unit of the counter is equipped with control logic which determines the threshold value as a function of operating variables. If, for example, the detection of an actuating force or pressing force is used in addition to the manual forceps, a smaller threshold value can be taken into account by means of the control logic if a comparatively large amount is produced during the working strokes Operating force or pressing force acts, while a larger threshold value is taken as the basis during the strokes relatively small actuation forces or pressing forces. Other possible operating variables taken into account are, for example (but not limited to) temperature conditions, operating frequencies, inserted dies and the like. ä.

The invention also proposes that the counter is formed with at least one, preferably two, module / modules. These modules can facilitate simplified assembly and disassembly. Here, a module may be formed with a transmitter of the sensor or a permanent magnet, while the other module has a receiver, a reed contact o. Ä. The modules also make it possible to easily provide different equipment variants of the hand tool, namely those with counting device and without counting device. It is also possible that by the modular design of the counter easy retrofitting an existing hand tool with a counter is possible.

It is quite possible that the counter counts passing through each working stroke, reaching an initial or end portion of the working stroke or an end position of the working stroke or the like. It is also possible that the hand tool has a working stroke, which requires several successive Teilhübe. To name just a few non-limiting examples, such a hand tool can be a cutting tool according to the patent DE 43 03 180 C2 or a hand tool for pressing sockets, pipes, cable lugs and similar tools according to patent DE 198 34 859 C2 or DE 199 63 097 C1 or a pressing tongs according to DE 10 2008 005 472 B3 act. Here u. U. the number of partial strokes carried out not meaningful in terms of the stress of the components of the hand tool, since in a first partial stroke of the power stroke, the stress on the components is still low, while the stress increases with increasing partial strokes. In this case, the control unit of the counter can be equipped with control logic, which increases the count only when several or all partial strokes of the power stroke have passed. It is also possible that the increase in the count takes place only after reaching a defined end position of the machining process. Possibly, such a pair of pliers is also with a so-called Zwangsgesperre, cf. Also, the cited in the present application documents of the applicant, in which a Zwangsgesperre is used equipped, which the Passing all Teilhübe makes mandatory or opening the hand tool only when reaching the defined end position of the machining process allows and / or allows temporary relief of the hand lever after a part of the working stroke. Here, a pawl for opening the hand lever is released only after passing through all successive partial strokes or when reaching the defined end position of the machining process. The release of such a blocking element can be used in the detection of the same via a suitable sensor as a pulse for increasing the count.

Advantageous developments of the invention will become apparent from the claims, the description and the drawings. The advantages of features and of combinations of several features mentioned in the description are merely exemplary and can take effect alternatively or cumulatively, without the advantages having to be achieved by embodiments according to the invention. Without thereby altering the subject matter of the appended claims, as regards the disclosure of the original application documents and the patent, further features can be found in the drawings, in particular the illustrated geometries and the relative dimensions of several components and their relative arrangement and operative connection. 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.

The features mentioned in the patent claims and the description are to be understood in terms of their number that exactly this number or a greater number than the said number is present, without requiring an explicit use of the adverb "at least". For example, when talking about an element, it should be understood that there is exactly one element, two elements or more elements. These features may be supplemented by other features or be the only characteristics that make up the product in question.

The reference numerals contained in the claims do not limit the scope of the objects protected by the claims. They are for the sole purpose of making the claims easier to understand.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1

zeigt eine erfindungsgemäße Handzange in einer teilgeschnittenen Draufsicht.

Fig. 2

zeigt eine Detailansicht II-II der Handzange gemäß Fig. 1.

Fig. 3

zeigt eine Detailansicht III-III der Handzange gemäß Fig. 1.

Fig. 4

zeigt im Detail eines Endbereichs von Handhebeln eine erfindungsgemäße Handzange.

Fig. 5

zeigt im Detail eines Endbereichs von Handhebeln eine erfindungsgemäße Handzange.

Fig. 6

zeigt schematisch eine Zähleinrichtung, wie diese in einer erfindungsgemäßen Handzange Einsatz finden kann.

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

Fig. 1

shows a hand tool according to the invention in a partially sectioned plan view.

Fig. 2

shows a detail view II-II of the pliers according to Fig. 1 ,

Fig. 3

shows a detail view III-III of the pliers according to Fig. 1 ,

Fig. 4

shows in detail of an end portion of hand levers a hand tool according to the invention.

Fig. 5

shows in detail of an end portion of hand levers a hand tool according to the invention.

Fig. 6

schematically shows a counter, as this can be used in a hand tool according to the invention.

DESCRIPTION OF THE FIGURES

Fig. 1 shows an example of a hand tool 1, here in training as pressing tongs for the compression of pipe joints, as this principle in the publications DE 199 63 097 C1 and DE 103 46 241 B3 is described, which are made the subject of the present application.

The operation of the hand tool 1 via the pivoting of hand levers 2, 3 via a working stroke 17 toward each other, which is accompanied by the pressing of a workpiece between jaws 4, 5. The hand lever 2, 3 are each formed in plate construction with two plates 6, 7 and 8, 9, which in the in FIGS. 2 and 3 area shown have a distance 10, 11. In the area of the hand lever 2, 3, a respective module 12, 13 is arranged. For the illustrated embodiment, the modules 12, 13 are integrated in the hand lever 2, 3, namely in a predetermined by the distance 10, 11 intermediate space 14, 15 are arranged. For this purpose, the modules 12, 13 have an extension which corresponds to the assigned distance 10, 11 or is smaller than this. Alternative integration options or holding the modules 12, 13 on basic bodies of the hand lever 2, 3 are also possible. For example, the integration of the modules 12, 13 in a recess of a base body of the hand lever 2, 3 take place.

With the modules 12, 13, a counter 16 is formed, which counts the number of traversed strokes 17 of the hand lever 2, 3 to each other for machining the workpiece. For the illustrated embodiment, the module 13 is formed with a transmitter 18, which may be, for example, a permanent magnet 19. The module 12 is formed with a receiver 20. If the transmitter 18 is formed with a permanent magnet 19, the receiver 20 can detect the magnetic field and its change via the working stroke 17. With the transmitter 18 and the receiver 20, a sensor 21 is formed, which detects the distance of the hand lever 2, 3 or falls below a minimum distance, whereby a count pulse is triggered. In the module 12 is also a display device 22, in particular an LED 23, integrated, which is visible on the inside of the hand lever 2 for the user, which (notwithstanding the illustrated embodiment) in a side region or on the outside of the hand lever 2 arranged and thus can be visible.

For that in the Fig. 1 to 3 illustrated embodiment, the modules 12, 13 at the end of the power stroke 17 a relatively large distance, so that a sensor 21 must be used, which can trigger the used for counting signal or a count pulse over this distance. If the spacing of the modules 12, 13 is to be reduced, at least one of the hand levers 2, 3 in the area of the counter can have an extension 24, 25 in the direction of the other hand lever 3, 2, which then carries the module 12, 13 or in which Module 12, 13 is integrated (see. Fig. 4 ).

It is also possible that according to Fig. 5 an extension 25 of a hand lever 3 in a recess 26 of an extension 24 of the other hand lever 2 or the body of the Hand lever 2 itself (and may also pass through this recess 26 therethrough). In this case, the module 12 can be arranged in a lateral boundary region of the recess 26, so that the module 13 is moved past the module 12 during the working stroke 17, u. U. with a very small distance. It is possible that for this embodiment, the modules 12, 13 are additionally protected by entry of the extension 25 into the recess 26 of the extension 24. Notwithstanding the illustrated embodiment, a plurality of modules, in particular a plurality of transmitters 18, in at least one of the extensions 24, 25 may be integrated, which are then successively passed, whereby a more accurate detection of the distance of the hand lever 2, 3 or the detection of the distance in several Steps is possible.

Fig. 6 schematically shows the counter 16, which is formed with the two modules 12, 13. Here, the hand lever 3 associated with the module 13 is formed with the permanent magnet 19 so that this requires neither a power supply nor a control device and does not receive or generate signals.

The hand lever 2 associated module 12 has the receiver 20, which is connected via line connections 27 to a battery or an accumulator 28 and a control unit 29, which is equipped with suitable control logic 30. The control unit 29 is in turn connected to a display device 22 and / or a connection 31 for an external power supply and / or a data transmission and / or a reset device 32 for a reset of the count. The electrical power supply of the control unit 29 can be made via the terminal 31 or via the accumulator or the battery 28. When using a rechargeable battery 28, a further connection 33 may be present for initial charging or recharging of the rechargeable battery.

• insgesamt eine Baugröße von weniger als 8 cm³, vorzugsweise weniger als 2 cm³ und insbesondere weniger als 1 cm³ und/oder
• eine maximale Erstreckung von 1 cm.

Preferably has a module 12, 13 or have both modules 12, 13th

• a total size of less than 8 cm ³ , preferably less than 2 cm ³ and in particular less than 1 cm ³ and / or
• a maximum extension of 1 cm.

In Fig. 6 the module 12 is surrounded by dashed lines. In this case, the module 12 may be cast into a block 34.

It is possible that the sensor 21 is an infrared distance sensor is used. It is also possible that a transfer between individual modules 12, 13 of the counter 16 and / or between the counter 16 and an external monitoring, display, documentation, storage and / or evaluation via an infrared transmission device takes place, which unidirectional can work or bidirectional work, for example. To change operating variables of the counter 16 to make an initialization or perform a reset.

The design according to the invention can also be used, for example, in connection with hand tools, such as those described by the applicant under the designations CS 10, CSV 10, CSV 10 FO MOST-POF, CSV 10 FO MOST, CSV 10 FAKRA, CS 11, AE, AE 24, CS 8, CK 90, CK 100, CS 30 STRATO, PHOTOVOLTAICS, CS 40, CS KTVR, CE. Cable cutter SH or SCORA2 (see brochure WEZAG: Tools for professional use, Document No .: Cat. 10/11). These and other hand tools of the kind relevant here, for which the invention can be used, are further in the applicant's documents DE 35 12 157 C2 . DE 37 08 727 C2 . DE 37 33 358 C1 . DE 40 23 337 C1 . DE 40 26 332 C2 . DE 40 39 435 C1 . DE 43 03 180 C1 . DE 44 27 553 C2 . DE 196 10 899 C1 . DE 296 20 856 U1 . DE 197 13 580 C2 . DE 197 09 639 A1 . DE 197 53 436 C2 . DE 297 12 879 U1 . DE 198 02 287 C1 . DE 198 07 737 C2 . DE 298 03 336 U1 . DE 198 32 884 C1 . DE 198 34 859 C2 . DE 199 24 086 C2 . DE 199 24 087 C2 . DE 199 63 097 C1 . DE 100 56 900 C1 . DE 101 32 413 C2 . DE 101 40 270 B4 . DE 102 42 345 B3 . DE 103 46 241 B3 . DE 10 2005 003 615 B3 . DE 10 2005 003 617 B3 . DE 10 2007 038 626 B3 . DE 10 2007 001 235 B4 . DE 10 2008 003 524 B4 . DE 10 2008 007 303 B4 . DE 10 2008 005 472 B3 . DE 10 2008 012 011 B3 . DE 10 2008 017 336 A1 . DE 20 2008 003 703 U1 . DE 10 2009 001 949 A1 . EP 1 724 101 A1 . EP 2 305 428 A1 . EP 2 463 969 A2 . EP 2 562 891 A1 . EP 2 672 580 A1 . EP 2 672 581 A1 . EP 2 672 582 A1 . EP 2 672 583 A1 . EP 2 672 584 A1 . EP 2 672 585 A2 and the unpublished patent applications EP 13 176 918.4 . EP 14 154 206.8 such as EP 14 177 831.6 described.

LIST OF REFERENCE NUMBERS

1

hand tool

2

hand lever

3

hand lever

4

jaw

5

jaw

6

plate

7

plate

8th

plate

9

plate

10

distance

11

distance

12

module

13

module

14

gap

15

gap

16

counting

17

stroke

18

transmitter

19

permanent magnet

20

receiver

21

sensor

22

display

23

LED

24

extension

25

extension

26

recess

27

line connection

28

Accumulator, battery

29

control unit

30

control logic

31

connection

32

Reset device

33

connection

34

block

Claims (16)

Hand tong (1) having a counting device (16) for counting the continuous working strokes (17), which is formed with a sensor (21) which detects the distance or path of two over the working movement relative to each other moving components. Hand tool (1) according to claim 1, characterized in that the counter (16) in the hand lever (2, 3) of the hand tool (1) is integrated. Hand tong (1) according to claim 1 or 2, characterized in that at least one hand lever (2; 3) is formed in plate construction and a module (12; 13) of the counting device (16) between plates (6, 7; 8, 9) of the hand lever (2, 3) is received. Hand tool (1) according to claim 2 of 3, characterized in that a module (12, 13) of the counter (16) is integrated in a sheath of a hand lever (2, 3) made of plastic or at least partially covered by this. Hand tong (1) according to one of the preceding claims, characterized in that the counting device (16) is equipped with a connection (31, 33). Hand tool (1) according to any one of the preceding claims, characterized in that the counting device (16) with a molded module (12, 13) is formed, in which a) a control unit (29), b) at least one line connection (27), c) a circuit board d) a transmitter (18), e) a receiver (20), f) a display device (22), g) a battery or an accumulator (28) and / or h) a connection (31, 33) for a power supply and / or data transmission is / are integrated. Hand tool (1) according to any one of the preceding claims, characterized in that a display device (22) for the number of continuous strokes (17) or a dependent thereon information is present. Hand tool (1) according to claim 7, characterized in that the display device (22) with an LED (23) is formed. Hand tool (1) according to one of the preceding claims, characterized in that one or the control unit (29) of the counter (16) is equipped with control logic (30), which on the basis of the counted strokes (17) an evaluation with respect to a wear of the hand tool (1), in particular a die or the drive parts makes. Hand tool (1) according to one of claims 7 to 9, characterized in that one or the control unit (29) of the counter (16) is equipped with control logic (30) which determines the number of strokes (17) detected by the counter (16) ) compares with a threshold value and, when the threshold value is exceeded, drives the display device (22). Hand tool (1) according to claim 10, characterized in that the control unit (29) of the counter (16) is equipped with control logic (30) which a) compares the number of working strokes (17) detected by the counting device (16) with a first threshold value and, when the first threshold value is exceeded, activates the display device (22) to generate a first indication, and b) compares the number of working strokes (17) detected by the counting device (16) with a second threshold value and, when the second threshold value is exceeded, activates the display device (22) to generate a second indication. Hand tool (1) according to claim 11, characterized in that the control unit (29) of the counter (16) is equipped with control logic (30) which a) compares the number of strokes (17) detected by the counter (16) with a threshold corresponding to a number of calibration strokes or strokes of a quality control, b) comparing the number of working strokes (17) detected by the counting device (16) with a threshold value which corresponds to a number of maximum allowable working strokes and / or c) comparing the number of working strokes (17) detected by the counting device (16) with a threshold value which correlates with the speed of reaching the maximum number of permitted working strokes. Hand tool (1) according to one of the preceding claims, characterized in that the counter (16) has a reset device (32). Hand tool (1) according to any one of claims 10 to 12, characterized in that the control unit (29) of the counter (16) is equipped with control logic (30) which determines the threshold value in dependence on other operating variables. Hand tool (1) according to one of the preceding claims, characterized in that the counter (16) is formed with at least one mountable, demountable and / or retrofittable module (12, 13). Hand tool (1) according to one of the preceding claims, characterized in that the control unit (29) of the counter (16) is equipped with control logic (30) which a) in a working stroke, which requires a plurality of successive partial strokes, only after passing through all successive partial strokes, or b) increases the count after reaching a defined end position of the machining process.

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