Hand pliers

Abstract

The invention relates to hand pliers (1) which are in particular embodied as crimping pliers. According to the invention, the hand pliers (1) comprise a counting device (16) which counts the number passed working strokes (17). The counting device (16) is built with a sensor which senses the distance or displacement of two components moved relatively to each other over the working stroke (17), in particular the distance or displacement of hand levers (2, 3). If the count number registered by the counting device (16) exceeds a threshold value, it is possible to produce a display at a displaying device of the hand pliers (1) which indicates that an exchange of drive elements or an exchange of dies or a certification of the hand pliers is required.

Claims

1. Hand pliers comprising a counting device for counting a number of passed working strokes wherein the counting device is built with a sensor which senses a distance or displacement of two components moved relatively to each other over the working stroke, wherein the counting device is built with a cast module into which: a) a control unit, b) at least a wire connection, c) an electrical or electronical board, d) a transmitter, e) a receiver, f) a displaying device, g) a battery or an accumulator, h) a port for a power supply and/or i) a port for a data transfer is/are integrated; wherein a control unit or the control unit of the counting device comprises control logic which on the basis of a counted number of working strokes performs an evaluation of a wear of a die or a drive part of the hand pliers.

2. The hand pliers of claim 1, wherein the counting device is integrated into hand levers of the hand pliers.

3. The hand pliers of claim 2, wherein one of the hand levers is built in a plate design and the cast module is accommodated between plates of the hand lever.

4. The hand pliers of claim 2, wherein the cast module is integrated into a cover of one of the hand levers made of plastic or at least partially covered by the same.

5. The hand pliers of claim 1, wherein the counting device comprises a port.

6. The hand pliers of claim 1, wherein a displaying device for displaying the number of passed working strokes or an information dependent thereof is provided.

7. The hand pliers of claim 6, wherein the displaying device is built with a LED.

8. The hand pliers of claim 1, wherein the control unit of the counting device comprises control logic which compares the number of working strokes registered by the counting device with a threshold and when exceeding the threshold controls or actuates a displaying device.

9. The hand pliers of claim 8, wherein the control unit of the counting device comprises control logic which determines the threshold value dependent on other operating parameters of the hand pliers.

10. The hand pliers of claim 9, wherein the control unit of the counting device comprises control logic which a) compares the number of working strokes registered by the counting device with a first threshold and actuates or controls the displaying device for producing a first display when exceeding the first threshold and b) compares the number of working strokes registered by the counting device with a second threshold and actuates or controls the displaying device for producing a second display when exceeding the second threshold.

11. The hand pliers of claim 9, wherein the control unit of the counting device comprises control logic which a) compares the number of working strokes registered by the counting device with a threshold which corresponds to a number of calibrating strokes or working strokes of a quality control, b) compares the number of the working strokes registered by the counting device with a threshold which corresponds to a number of the maximal admissible working strokes and/or c) compares the number of working strokes registered by the counting device with a threshold which correlates with the upcoming arrival at the number of the maximal admissible working strokes.

12. The hand pliers of claim 8, wherein the control unit of the counting device comprises control logic which a) compares the number of working strokes registered by the counting device with a first threshold and actuates or controls the displaying device for producing a first display when exceeding the first threshold and b) compares the number of working strokes registered by the counting device with a second threshold and actuates or controls the displaying device for producing a second display when exceeding the second threshold.

13. The hand pliers of claim 12, wherein the control unit of the counting device comprises control logic which a) compares the number of working strokes registered by the counting device with a threshold which corresponds to a number of calibrating strokes or working strokes of a quality control, b) compares the number of the working strokes registered by the counting device with a threshold which corresponds to a number of the maximal admissible working strokes and/or c) compares the number of working strokes registered by the counting device with a threshold which correlates with the upcoming arrival at the number of the maximal admissible working strokes.

14. The hand pliers of claim 8, wherein the control unit of the counting device comprises control logic which a) compares the number of working strokes registered by the counting device with a threshold which corresponds to a number of calibrating strokes or working strokes of a quality control, b) compares the number of the working strokes registered by the counting device with a threshold which corresponds to a number of the maximal admissible working strokes and/or c) compares the number of working strokes registered by the counting device with a threshold which correlates with the upcoming arrival at the number of the maximal admissible working strokes.

15. The hand pliers of claim 1, wherein the counting device comprises a reset-device.

16. The hand pliers of claim 1, wherein the cast module builds an assembly-module, a disassembly-module and/or a retrofit module.

17. The hand pliers of claim 1, wherein the control unit of the counting device comprises control logic which increases the registered count number a) for a working stroke requiring a plurality of successive stroke parts only after having passed all of the successive stroke parts or b) only after having reached a defined end position of the working process.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention can be better understood with reference to the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the present invention. In the drawings, like reference numerals designate corresponding parts throughout the several views.

(2) FIG. 1 shows inventive hand pliers in a partially cut plain view.

(3) FIG. 2 shows a detailed view II-II of the hand pliers according to FIG. 1.

(4) FIG. 3 shows a detailed view III-III of the hand pliers according to FIG. 1.

(5) FIG. 4 shows in detail an end region of hand levers of inventive hand pliers.

(6) FIG. 5 shows in detail an end region of hand levers of inventive hand pliers.

(7) FIG. 6 schematically shows a counting device which might be used in inventive hand pliers.

DETAILED DESCRIPTION

(8) FIG. 1 shows as an example hand pliers 1, here embodied as crimping pliers for crimping tube connections as generally described in the publication DE 199 63 097 C1 and DE 103 46 241 B3 which are integrated into the disclosure of the present application.

(9) The actuation of the hand pliers 1 is provided by a pivoting movement of the hand levers 2, 3 towards each other over a working stroke 17 which coincides with the crimping of a workpiece between pliers jaws 4, 5. The hand levers 2, 3 each have a plate design with two plates 6, 7, respectively 8, 9, which have a distance 10, 11 in the region shown in FIGS. 2 and 3. In each of the regions of the hand levers 2, 3 a module 12, 13 is arranged. For the shown embodiment, the modules 12, 13 are integrated into the hand levers 2, 3, namely arranged in an intermediate space 14, 15 defined by the distance 10, 11. For this purpose, the modules 12, 13 have an extension which corresponds to the associated distance 10, 11 or which is smaller than the associated distance 10, 11. Also alternative options for an integration or for holding the modules 12, 13 at the base bodies of the hand levers 2, 3 are possible. It is e.g. possible that the modules 12, 13 are integrated into a recess of a base body of the hand levers 2, 3.

(10) A counting device 16 is built with the modules 12, 13. The counting device 16 counts the number of passed working strokes 17 of the hand levers 2, 3 towards each other for processing the workpiece. For the shown embodiment, the module 13 is built with a transmitter 18 which might e.g. be a permanent magnet 19. It is possible that the module 12 comprises a receiver 20. If the transmitter 18 is built with a permanent magnet 19, the receiver 20 is able to sense the magnetic field and its change over the working stroke 17. A sensor 21 is built with the transmitter 18 and the receiver 20. The sensor 21 senses the distance of the hand levers 2, 3 or senses that the distance of the hand levers 2, 3 goes below a minimum distance which triggers a counting impulse. Furthermore, a displaying device 22 (in particular an LED 23) is integrated into the module 12 which is visible for the user at the inner side of the hand lever 2. However, (deviating from the shown embodiment) is it also possible that the displaying device 22 is located in a side region or at the outer side of the hand lever 2 so that it is visible. For the embodiment shown in FIGS. 1 to 3 also at the end of the working stroke 17 the modules 12, 13 comprise a comparatively large distance so that it is required to use a sensor which is also able to trigger the signal used for the counting or a counting impulse for this distance. If it is intended to reduce the distance of the modules 12, 13, it is possible that in the region of the counting device at least one of the hand levers 2, 3 comprises a protrusion 24, 25 towards the other hand lever 3, 2 which supports the module 12, 13 or wherein the module 12, 13 is integrated (cp. FIG. 4).

(11) It is also possible that according to FIG. 5 a protrusion 25 of a hand lever 3 extends into a recess 26 of a protrusion 24 of the other hand lever 2 or of the base body of the hand lever 2 itself (and in some cases also extends through to the other side). In this case, it is possible that the module 12 is located in a lateral limiting region of the recess 26 so that during the working stroke 17 the module 13 laterally passes the module 12 (in some cases with a very small distance). It is possible that for this embodiment the modules 12, 13 are additionally protected by the entry or accommodation of the protrusion 25 into or in the recess 26 of the protrusion 24. Differing from the shown embodiment, it is also possible that a plurality of modules, in particular a plurality of transmitters, is integrated into at least one of the protrusions 24, 25 which are then passed successively which might lead to a more exact sensing of the distance of the hand levers 2, 3 or to a sensing of the distances in a plurality of steps.

(12) FIG. 6 schematically shows the counting device 16 which is built with the two modules 12, 13. Here, the module 13 associated with the hand lever 3 is built with a permanent magnet 19 so that this module 13 does not require a power supply and a control device and does not receive or produce signals.

(13) The module 12 associated with the hand lever 2 comprises the receiver 20 which is connected by wire connections 27 to a battery or an accumulator 28 or a control unit 29 which comprises suitable control logic 30. The control unit 29 is again connected to a displaying device 22 and/or a port 31 for an external power supply and/or for a data transfer and/or to a reset-device 32 for resetting the registered count number. The electrical power supply of the control unit 29 might be provided via the port 31 or by the accumulator or the battery 28. For the use of an accumulator 28 another port 33 might be provided for the first loading or reloading of the accumulator.

(14) Preferably, a module 12, 13 comprises or both modules 12, 13 comprise an overall construction size of less than 8 cm.sup.3, preferably less than 2 cm.sup.3 and in particular less than 1 cm.sup.3 and/or a maximal extension of 1 cm.

(15) In FIG. 6 the module 12 is framed with a dashed line. It is possible that the module 12 is cast to a block 34.

(16) It is possible that as the sensor 21 an infrared distance sensor is used. Furthermore, it is possible that a transfer between the modules 12, 13 of the counting device 16 and/or between the counting device 16 and an external monitoring device, displaying device, documenting device, storing device and/or evaluating device is provided by an infrared transfer device which might operate uni-directional or also bi-directional (e.g. for changing operating parameters of the counting device 16, for performing an initialization or performing a reset).

(17) The inventive design is e.g. also usable in connection with hand pliers as distributed by the applicant under the identification CS 10, CSV 10 , CSV 10 LWL-MOST-POF, CSV 10 LWL-MOST, CSV 10 FAKRA, CS 11, AE, AE 24, CS 8, CK 90, CK 100, CS 30 STRATO, PHOTOVOLTAIK, CS 40, CS KTVR, CE, cable cutter SH or SCORA 2 (cp. brochure WEZAG: Werkzeuge fr die professionelle Anwendung, document-No.: Cat. 10/11). These or other hand pliers of the present type for which the invention is usable are furthermore described in the documents of the applicant 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 017 366 A1, DE 20 2008 003 703 U1, DE 10 2009 001 949 A1, EP 1 724 101 B1, 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 B1 and the post-published patent applications EP 2 826 598 A1, EP 2 905 848 A1 as well as the non-published patent application EP 14 177 831.6.

(18) Many variations and modifications may be made to the preferred embodiments of the invention without departing substantially from the spirit and principles of the invention. All such modifications and variations are intended to be included herein within the scope of the present invention, as defined by the following claims.