DE202004018133U1 - Insulation stripping tool e.g. for cables, has first cutting element swivel-mounted relative to second cutting element - Google Patents

Abstract

A gripper jaw-type insulation stripping tool has a basic body provided with a lower arm (23), a drive lever, an upper arm (6), first and second retention elements (9,10) and first and second cutting elements. The first cutting element (8) can be swiveled relative to the second cutting element (11) and is movably mounted.

Description

The The invention relates to a forceps stripping tool for cables with a lower arm having a body, a drive lever, an upper arm, first and second holding members and first and second cutting elements.

such Stripping tools are known and are used for stripping electrical Cables of different types used, being plier-like press together of operating handles such tools inserted between the pliers ends cable end is processed so that its isolation for a certain predetermined length to later Peel off is cut.

When disadvantageous has been found in such tools that after completion of the incising and withdrawing operation, the actuating force, the operator exercises by his hand on the pliers arms, relax must to release the cable again. This can be stripped Cable end disadvantageous by the opening tool of parts the same touched or taken so that the wires of the stripped cable end bent, split or otherwise be affected, resulting in reworking the cable end is required. Especially is an afterthought Twisting of the strands of wire by means of fingers usual, which is due to corrosive Properties of hand sweat disadvantageous affects the core material.

Farther is for clamping the cable to be stripped between the jaws the pliers-like tool a relatively large force necessary because by the cable must be held during the removal of the insulating piece. It can happen that the isolation of the clamped Cable is deformed by the high clamping force. This affects now often disadvantageous in that subsequently applied to the stripped cable end ferrules with her collar no longer pushed properly over the insulation can be. Here, a post-processing is required.

Farther Such wire strippers are often with equipped with a further cutting device, for example for Shorten of cables, which are nearby the finger of the hand of the actuator can be located. The disadvantage here is the risk of injury the finger seen.

As an example for illustrating such a forceps-like tool is the DE 203 15 756 U1 2004.04.01 called.

The The object of the present invention is now a tool to provide, in which the disadvantages described above not occur more and which allows further benefits.

According to the invention this Task by a stripping tool with the features of the claim 1 solved.

The The idea underlying the invention is the stripping tool to control so that the contact force to hold the cable when Peeling off is reduced and a release of the cable from the tool done in one operation.

One pliers stripping tool for cables with a lower one Arm having basic body, a drive lever, an upper arm, first and second holding members and first and second cutting elements, characterized that the first cutting element relative to the second cutting element is arranged pivotably and displaceably

there it is advantageous that the first cutting element severed the insulating withdraws while the second cutting element a stop for the insulation of the stripped Cable forms and thus the clamping force to hold for the removal process significantly reduced.

It it is preferred that the first cutting element in a relative to a slider swiveling cutter carrier and the second cutting element is disposed in the lower arm. hereby is enabled that the second cutting element is fixed and thus the stop for the rest Isolation can form, wherein the first arranged on the sliding slider Cutting element the removal process independent of the second cutting element performs.

To it is preferred that the blade carrier on the slider in a Cutting joint by means of a first power storage element in a specific Angle to the slider held resiliently pivoted on the upper arm, and, that the slider in the main body slidably guided is.

In particularly preferred embodiment stand the drive lever, the upper arm and the slider by means of a control lever in operative connection, which advantageously a coherent control the stripping by means of the functional elements is made possible. For this it is advantageous that the control lever three cams having.

For this purpose, the control lever is via a control joint with the drive lever, via the first STEU with the slider, the second control cam with the upper arm and the third control cam with a stop edge of the body in cooperation. It is particularly advantageous that only one control lever is needed, whereby a reduction of a variety of parts is done.

In a preferred embodiment is the control lever with the drive lever with a second force storage element at a distance to the control joint in conjunction, thereby providing an advantageously simple Coupling of cams and thus coupled components is possible.

In a further particularly preferred embodiment of the stripping tool is the drive lever with the body in a drive joint swiveling and over a third force storage element with the body in combination, wherein the Drive joint in the upper region of the base body and on the handle of the drive lever opposite End is arranged. This is an advantageous force distribution reached long lever arms.

It is advantageous in that the slider is a the first cutting element opposite Having third holding element, whereby the deducted insulating piece with the overlying first cutting element is held in a simple manner.

The slide is in the lower arm of the body by means of bilateral Guided guide pin and arranged resiliently supported by means of a fourth force storage element. With this arrangement is advantageously achieved that damage to the Core of the cable is also avoided during the removal process.

It it is preferred that the control lever, the pivotal movement of the drive lever each bounded by a stop with the body.

Of the Drive lever has at the opposite end of his grip an upper knife arranged to cooperate with a in the upper region of the body lower knife on. This cutting device is thus advantageous removed from the range of the operator's finger and points the additional Advantage of a low force due to a long lever arm on.

At least a handle part of the stripping tool has a non-slip coating on, which in an advantageous manufacturing method in a two-component injection molding process will be produced.

advantageous Embodiments and developments of the invention are the subject the dependent claims and the description with reference to the drawing.

following the invention with reference to the schematic figures of the drawing specified embodiments explained in more detail. It shows attended:

1 an embodiment of a Stripping according to the invention in side view with its functional parts in rest position;

2 after the stripping tool 1 in a first work situation;

3 after the stripping tool 1 in a second work situation; and

4 after the stripping tool 1 in a final position.

All identical or functionally identical elements - unless stated otherwise is - are with provided the same reference numerals.

In 1 is a stripping tool 1 for stripping cables in a lateral view with its functional parts in a rest position.

The stripping tool 1 consists of a basic body 2 which in this exemplary embodiment consists of two side shells, one of which is shown here with a view of its inside.

The main body 2 is pistol-like with a handle that has a coating 4 which is made of a non-slip material for convenient and safe handling and has notches, corrugations and the like.

The handle can be single-shell or two halves. Here he is integral with the illustrated side shell of the body 2 shown connected, with its boundary to the open inside of this side shell is marked by a line.

At the top of the base body is equipped with an attachment which serves for a cutting device, for example for cutting a cable and will be described in more detail below. Between the handle and the attachment is the main body 2 widened designed, wherein it is designed in the front region of the tower down vertically extending approximately rectilinear and in its lower part in a lower arm 23 with a lower arm end 22 continues.

Below the essay, the basic body 2 a drive joint A with a cylindrical Recording and one perpendicular to the main body 2 (here on the drawing plane) standing hinge axis. Another cylindrical receptacle serves to receive a rocker joint C with a joint axis parallel to that of the joint A and is located in the vicinity of the vertically downwardly extending front edge of the body 2 , Furthermore, the main body 2 with a guide 20 provided parallel to the upper edge of the lower arm 23 runs.

The drive joint A serves for the pivotable mounting of a drive lever 5 which also has in its lower part a handle, which in the hand of an operator with the handle of the body 2 cooperates by pushing the hand around the drive joint A backwards against the handle of the body 2 pivoted. The drive lever 5 is configured in a shape having an upper and a lower arc, said sheets on the front of the drive lever 5 a bulge with a finger rest for an advantageous handling of the handle of the drive lever 5 form.

The drive lever 5 is in the region of its storage around the drive joint A around with a third force-storing element 16 opposite the main body 2 so in relationship that when squeezing the hand of the operator of this power storage element 16 is tense. When releasing the drive lever 5 pushes the third force storage element 16 the drive lever 5 back in his in 1 shown rest position back. This power storage element 16 is in a preferred embodiment, a metallic bending or plate spring.

The rocker joint C serves for the pivotable mounting of an upper arm 6 with one at the bottom 22 of the lower arm 23 opposite arranged upper arm end 21 , The upper arm end 21 opposite, rearwardly disposed end of the upper arm 6 has a coupling joint B, which is in contact with a control lever 3 which will be explained in more detail below.

The upper end of the arm 21 and the lower end of the arm 22 are designed like a pair of tongs. The upper end of the arm 21 has on its underside a first holding element 9 , which is formed protruding and to a second holding element 10 on the top of the lower arm end 22 corresponds, which may be a suitable recess, for example. When closing the stripping tool 1 becomes the upper end of the arm 21 by pivoting the upper arm 6 on the lower arm end 22 moved to a in-between manner in a known manner to be stripped cable between the first and the second holding element 9 . 10 to fix for a stripping.

The pivoting movement of the upper arm 6 about the pivot joint C is moved by movement of the drive lever 5 generated in the manner described above, by the movement of the drive lever 5 over the control lever 3 and the coupling joint B on the upper arm 6 is transmitted. This is the control lever 3 in a control joint E pivotally mounted on the drive lever 5 arranged in the front, slightly above its center area.

The control lever 3 has a portion disposed in front of the control joint E, which extends arcuately upwards and ends in a stop portion, which in the in 1 shown rest position of the stripping tool 1 rests against the cylindrical body of the rocker joint C and thus the rest position of the drive lever 5 sets.

The rearward facing side of the upwardly extending forward portion of the control lever 3 is as a first cam 24 formed, which with a tension joint D in the leadership 20 of the basic body 2 slidably mounted slider 25 in contact and cooperation, which will be described later.

The back section of the control lever 3 is formed similar to the front portion, but has a rearwardly extending extension which is rectangular and at the rear upper corner of a circular recess 19 that of an upwardly curving edge portion whose rearward outer edge has a third control curve 18 forms, is surrounded to a certain part. Towards the front, this circular recess extends 19 in the in 1 illustrated rest position of the stripping tool 1 as a second control curve 27 directed obliquely upwards as a straight line to an edge, followed by a side extending by approximately 90 ° downwards side, which ends further down in a rounding and behind the control joint E in the first control curve 24 passes.

At the bottom of the rectangular section of the control lever 3 is a receptacle for a second power storage element 15 formed, which the control lever 3 opposite the drive lever 5 against in the in 1 illustrated rest position of the stripping tool 1 in the recess 19 the second cam 27 clutch joint B presses and thus a forced contact of these elements B, 27 thus ensuring that this contact with each other is ensured in all positions. The second energy storage element 15 is preferably formed as a helical metallic compression spring.

The coupling joint B is formed in one embodiment as a rotatable roller on the upper arm, and it also as a sliding pin with the control lever 3 Corresponding material pairing can be performed.

The first control curve 24 of the control lever 3 cooperates with the tension joint D, which is designed like the coupling joint B. The tension joint D is at the left end of the slider 25 rotatably mounted, wherein the opposite right end of the slider 25 is provided with a cutting joint F, in which a cutter carrier 7 is pivotally mounted. The slider 25 extends in an extension to the front lower arm end 22 , where it is on or in the lower arm 23 is mounted longitudinally adjustable and by means of guide pins 26 in the main body 2 in both side parts is guided on both sides. The above pivotally mounted cutter support 7 is opposite the slider 25 via a first force storage element 14 held so springy that the cutter carrier 7 in each pivot position against the underside of the upper arm 6 is pressed and the pivoting movement of the upper arm 6 on the cutter carrier 7 is transferable. The energy storage element 14 is a known metallic bending or torsion spring.

The blade carrier 7 is in its front end with a first cutting element 8th equipped, which is used in him in a known manner. This first cutting element extends perpendicular to the plane of the drawing and acts with a second cutting element 11 together, which is just before the spout of the lower arm 23 in the lower end of the arm 22 is introduced. The second cutting element 11 is fixed, wherein the first cutting element 9 opposite the second cutting element 11 due to the pivotability of the cutter carrier 7 is movably arranged.

The front section of the slider 25 is at its front end with a third holding element 13 whose function is described below. Furthermore, the front portion of the slider 25 a stop device 12 . 12a on, with which in known manner the length of a strip to be stripped in the 1 from the right between the arms inserted cable (not shown) is adjustable in the longitudinal direction. This is the front section of the slider 25 laterally with locking means 12a provided with the stop device 12 interact in a known manner.

Also, the front section of the slider is 25 between its bottom and the top of the lower arm 23 or of the basic body 2 by means of a fourth force storage element 17 resiliently supported, whose function will also be described below. This fourth force storage element 17 For example, integral with the front portion of the slider 25 executed and thereby be designed as a resilient tongue, for example made of plastic. An insert made of metal is also possible, for example.

The operation of the stripping tool 1 will now be with reference to the 2 to 4 explained.

This shows 2 a first working position of the stripping tool 1 , wherein by actuation of the drive lever 5 a force over the lever 3 by means of the recess 19 on the coupling joint B of the upper arm 6 is transferred to the upper arm 6 pivoted about the rocker joint C and his arm end 21 with the first holding element 9 on the holding element 10 of the lower arm 23 moved, with the intervening cables to be stripped (not shown) of the holding elements 9 . 10 is held over its isolation. This holding process is only for fixing the cable to the cutting elements 8th . 11 necessary, so that only small forces are required, whereby the insulating jacket of the cable is advantageous little or not deformed.

The cutting elements 8th . 11 cut in this in 2 shown position the cable insulation to subsequent separation process so that the inner wires of the cable are not damaged. This is additionally advantageously ensured by the fact that the front portion of the slider 25 through the fourth force storage element 17 opposite the lower arm 23 is resiliently supported. This causes the third holding element 13 that through the cutting elements 8th . 11 Insulation of the stripping cable additionally cut in and out of the remaining insulation behind the first cutting element 8th pushed up against it, passing between the cutting element 8th and the third holding element 13 is held.

The control lever 3 is with his first cam 24 has been guided along the drawbar D, wherein the first cam 24 is formed so that in this position the tension joint D still in its rest position as in 1 is shown left. By a further movement of the drive lever 5 on the handle of the main body 2 there is the control lever 3 , as in 3 is shown, moves backwards and thus exerts a force on the tension joint D and the slider 25 this in the lead 20 in the main body 2 takes to the rear. The as described above between the first cutting element 8th and the third holding element 13 held and cut from the rest of the insulation of the cable or cut off to be deducted insulating the cable is by this pulling operation of the sliding tee 25 and the cutter carrier 7 finally separated from the remaining insulation of the cable. Here, the remaining insulation of the cable from the fixed second cutting element 11 retained, thereby only an advantageously low holding force of the first and second holding element 9 . 10 necessary is.

Towards the end of the pulling process, that is at the end of the rearward pivoting movement of the drive lever 5 , is by touching the rear edge, namely the third cam 18 of the control lever 3 , with a stop edge 28 in the back of the body 2 the control lever 3 with further force acting on the drive lever 5 pivoted by the operator's hand counterclockwise about the control joint E, since the third control cam 18 of the control lever 3 at the stop edge 28 along and thus controls this pivoting movement.

The first cutting element 8th holds up to this working position of the stripping tool 1 the severed insulating piece of the cable against the third holding element 13 pressed firmly, since the coupling joint B still with the second control cam, namely the horizontal portion behind the recess 19 , in touch.

Another actuation of the drive lever 5 causes a further pivoting of the control lever 3 counterclockwise about the control joint E due to the movement of the third cam 18 at the stop edge 28 , which eventually causes the in 4 illustrated end position of the stripping tool 1 results.

In this process, the coupling joint B is on the second cam 27 of the control lever 3 at its rectangular rear section on the run to about 90 ° downward section, with the upper arm 6 raised as a result of this controlled movement. With this raising of the upper arm 6 has also the cutter carrier 7 by the force acting on it of the first power storage element 14 moved up and released the separated insulation piece of the cable. The insulator falls down or stays with a small one on the cable for later removal.

Furthermore, this is between the first and second holding element 9 . 10 held cable also released in this last process, with no element of the stripping tool 1 can damage and / or alter the stripped cable end due to uncontrolled movement.

After releasing the drive lever 5 this moves together again as described above with the control lever 3 and the slider 25 with the cutter carrier 7 in the rest position of the stripping tool 1 for another stripping back.

The drive lever 5 , the upper arm 6 and the control lever 3 may be formed so that they are flat over or interlocking between two side parts of the body 2 are arranged, which are connected to each other by a detachable or non-detachable connection in a known manner. All parts except for the cutting elements 8th . 11 can be made of suitable plastic.

In addition, the approach on the body has an upper and a lower knife 29 . 30 for cutting to length, for example, a cable. This Ablängvorgang is also by operating the drive lever 5 executed. The lower knife 30 is in the body 2 fixed, with the upper knife 29 in a correspondingly shaped end portion of the drive lever 5 is introduced above the drive joint A. In this preferred embodiment, an advantageous lever ratio results for this cutting device. Furthermore, this cutting device is located outside the range of the operator's fingers, thereby minimizing a possible risk of injury.

The stripping tool 1 is suitable in the exemplary embodiment shown particularly for round cables, wherein the cutting elements 8th . 11 and the holding elements 9 . 10 adapted by means of their shape.

The cutting elements 8th . 11 are preferably arranged at an angle to the longitudinal direction of the cable to be stripped.

Even though the present invention above based on a preferred embodiment It is not limited to this, but in many ways and modifiable.

For example, the flooring 4 of the handles or be executed as a two-component injection molding.

The formation of the pivot joints A to F can be done by means of metal or plastic rivets, which at the same time the entire tool 1 stick together.

The Cutting elements can also be interchangeable, the shape of which is an adaptation for different Cable shapes allows. Likewise, by modified retaining elements with corresponding Cutting elements adapt to many different cable types respectively.

Also are interchangeable holding elements conceivable.

1

stripping

2

body

3

control

4

covering

5

drive lever

6

Oberer poor

7

cutting carrier

8th

first cutting element

9

first retaining element

10

second retaining element

11

second cutting element

12

stop device

12a

latching means

13

third retaining element

14

first Power storage element

15

second Power storage element

16

third Power storage element

17

fourth Power storage element

18

third cam

19

recess

20

guide

21

upper arm end

22

lower arm end

23

lower poor

24

First cam

25

slide

26

spigot

27

Second cam

28

stop edge

29

upper knife

30

lower knife

A

drive joint

B

coupling joint

C

rocker joint

D

pull link

e

control joint

F

cutting joint

Claims (15)

Pliers-type stripping tool ( 1 ) for cables with a lower arm ( 23 ) having basic body ( 2 ), a drive lever ( 5 ), an upper arm ( 6 ), first and second retaining elements ( 9 . 10 ) and first and second cutting elements ( 8th . 11 ), characterized in that the first cutting element ( 8th ) relative to the second cutting element ( 11 ) is arranged pivotably and displaceably. Stripping tool ( 1 ) according to claim 1, characterized in that the first cutting element ( 8th ) in a relative to a slider ( 25 ) pivotable blade carrier ( 7 ) and the second cutting element in the lower arm ( 23 ) is arranged. Stripping tool ( 1 ) according to claim 1 or 2, characterized in that the cutter carrier ( 7 ) on the slider ( 25 ) in a cutting joint (F) by means of a first force storage element ( 14 ) at a certain angle to the slider ( 25 ) on the upper arm ( 6 ) is held resiliently pivoted adjacent. Stripping tool ( 1 ) according to one of claims 1 to 3, characterized in that the slider ( 25 ) in the body ( 2 ) is guided displaceably. Stripping tool ( 1 ) according to one of claims 1 to 4, characterized in that the drive lever ( 5 ), the upper arm ( 6 ) and the slider ( 25 ) by means of a control lever ( 3 ) are in operative connection. Stripping tool ( 1 ) according to claim 5, characterized in that the control lever ( 3 ) three cams ( 18 . 24 . 27 ) having. Stripping tool ( 1 ) according to claim 6, characterized in that the control lever ( 3 ) via a control joint (E) with the drive lever ( 5 ), via the first control cam ( 24 ) with the slider ( 25 ), via the second control cam ( 27 ) with the upper arm ( 6 ) and the third control curve ( 18 ) with a stop edge ( 28j of the basic body ( 2 ) interacts. Stripping tool ( 1 ) according to one of claims 5 to 7, characterized in that the control lever ( 3 ) with the drive lever ( 5 ) with a second force storage element ( 15 ) is connected at a distance to the control joint (E). Stripping tool ( 1 ) according to one of claims 1 to 8, characterized in that the drive lever ( 5 ) with the basic body ( 2 ) is pivotally connected in a drive joint (A) and via a third force storage element (A) 16 ) with the basic body ( 2 ). Stripping tool ( 1 ) according to claim 9, characterized in that the drive joint (A) in the upper region of the base body ( 2 ) and on the handle of the drive lever ( 5 ) opposite end is arranged. Stripping tool ( 1 ) according to one of claims 1 to 10, characterized in that the slider ( 25 ) a the first cutting element ( 8th ) Opposite third holding element ( 13 ) having. Stripping tool ( 1 ) after one of the Claims 1 to 11, characterized in that the slider ( 25 ) in the lower arm ( 23 ) of the basic body ( 2 ) by means of two-sided guide pin ( 26 ) and by means of a fourth force storage element ( 17 ) is arranged resiliently supported. Stripping tool ( 1 ) according to one of claims 5 to 12, characterized in that the control lever ( 3 ) the pivoting movement of the drive lever ( 5 ) each by a stop with the body ( 2 ) limited. Stripping tool ( 1 ) according to one of claims 1 to 13, characterized in that the drive lever ( 5 ) at the opposite end of its handle an upper knife ( 29 ) for cooperation with one in the upper region of the main body ( 2 ) arranged lower knife ( 30 ) having. Stripping tool ( 1 ) according to one of claims 1 to 14, characterized in that at least one handle part ( 2 . 5 ) of the stripping tool ( 1 ) a non-slip coating ( 4 ) having.