Tool for crimping insulated wire-end-ferrules in strip form.

p0001The invention relates to a tool for pressing insulated ferrules in strip form, with a loading station for introducing a stripped wire end into a provided with a plastic collar ferrule, a two cheek plates having crimping and with a transport device for advancing from the charging station to the crimping station, the tool with a forward stroke and a return stroke having drive is connected. The tool in question is connected to a drive or is provided with such. There are ferrules processed in strip form, ie those ferrules which are connected to each other band-shaped over contiguous areas within the plastic collar. In particular, such bands ferrules are processed, in which the plastic collars are molded together hanging without substantial distance, so that when separating each ferrule from tape produces no waste.

p0002A tool of the type described above is known in the form of pliers, being provided as a drive two hand lever. The tool is designed as a combination tool and permitted in a separate station cutting off the head, in another station stripping of the conductor end and finally crimping a crimping station. During cutting and a stripping the ferrules are not transported in the form of tape. To trigger the crimping in the crimping of the conductor is first with its stripped conductor end is inserted into the charging station by the collar side end of the ferrule in this and applying pressure to the conductor so pushed forward, that the front end of the ferrule is introduced into a Transportradscheibe, by their rotation, the parts are transported from the loading station to the crimping station. In the crimping station is then carried out, the pressing by two press jaws are moved relative to each other. The disadvantage here is that the transport of the parts from the charging station in the crimping of a exerted by hand coupling process is dependent and only occurs if properly the Transportradscheibe is achieved. By exercised by hand pressure is indeed achieved that the stripped conductor end gets a proper seat in the ferrule, there is a danger in thin and soft wires that the conductor may be bent. A substantial disadvantage persists that only a certain portion of the ferrule can be detected with the crimping operation. The front free end of the ferrule, which has penetrated the Transportradscheibe, can not be compressed, so that here a tulip-shaped bulge is formed which hinders the insertion of bearing the pressed-ferrule Conductor end to one terminal of the pressing jaws.

p0003It is also a pair of pliers to crimp ferrules in strip form, in which the strip is inserted from ferrules in a magazine. The so loaded magazine is inserted into the chuck. The magazine has a recess, can be detected, the tape of the end sleeves through which the thumb of the hand and pushed forward by a pitch, to the front ferrule ends up in the crimping between the cheek plates. It is then the otherwise stripped end of the conductor in the crimping station, which is also charging station, plugged in, and by the pincer movement the pressing jaws are relative to each other is driven, whereby the length of the metallic part of the ferrule three wells are pressed. simultaneously with the pressing process takes place separating the deformed ferrule from tape. A disadvantage of this pliers, that no transport means is provided for the automatic feed of the tape strip. The transport must rather be carried out manually and are coordinated performed on the pressing. Even with this nipper, it is not possible to achieve a proper pressing with trapezoidal profile.

p0004Another known tool for crimping ferrules in strip form is formed either as a hand tool or associated with a pneumatic drive. This tool is suitable for pressing such ferrules in strip form, which are injected under formation of connecting bridges each other. The feeding of the tape ferrules done out of a magazine. The ferrules are positioned in the crimping, and it follows the crimping process by the pressing jaws. The existing transport means for the transfer of the parts from the charging station to the crimping station has a pusher finger which engages between the metal sleeves of the ferrules. In addition to the charging station, the crimping and the transport device is still a cutter necessary having two cutting edges, by means of which the connecting bridge is cut between the plastic collar to form waste pieces. This takes place during the transport from the loading station to the crimping station. The forward transport of uncompressed ferrule happens during the return of the drive. This is disadvantageous, as the pressed ferrule must be removed from the crimping before inserting the backward stroke, thus time space is created to bring an unpressed ferrules in the range of crimping station during the return stroke. Even with erroneous pressing needs the crimping before embarking on the return stroke, so before releasing the hand lever of the pliers, are cleaned. Failure to do so arises again a failure by the hook parts.

p0005The invention has for its object to provide a tool for pressing insulated ferrules in strip form, in which all movements for the positive control can be derived, yet trouble-free compression, also using a trapezoidal profile, is possible.

p0006This is according to the invention in which the kind described in the opening tool reaches the fact that the movement of the transport device are connected to a first part of the forward stroke of the drive and the closing movement of the press jaws of the crimping station with a second part of the forward stroke of the actuator, while the return stroke of the actuator only associated with the opening movement of the press jaws.

p0007The new tool is equipped with automatic control of the different movements, by each forcibly controlled movement takes place at such a time in which it is also expected by the user of the tool. There is no coordination or operation of another control operation required. The front ferrule on tape is not in the crimping station, but in the charging station, and it is there only necessary to insert the stripped conductor end. Both the transport operation from the loading station to the crimping and the crimping operation itself derived from the forward stroke of the actuator, thereby preventing that takes place a feed from the charging station in the crimping station during the return stroke. This means that even after you release the lever of a manual provided with the tong-compressed with the ferrule end of the conductor can be removed from the crimping station, without the danger that occurs here entanglement or some other interruption. Also, the feed from the charging station in the crimping station is necessarily and thus safely achieved without it being dependent on the skill of a release operation at a Transportradscheibe. Also separating the front ferrule of the tape takes place during the forward stroke of the actuator are ready to install the crimping operation, so that the separated ferrule can move in the range of press jaws of crimping centering. The compression can be carried out readily and advantageously including the tip of the metal portion of the ferrule with a tulip formation is avoided and also - depending on the design of the press jaws - also proper trapezoidal profile can be produced. The new tool works independently from the supernatant of the conductor on the front end of the ferrule. Since the front end of the conductor abuts anywhere, also bending is not possible. The compressed part is, since the opening movement of the cheek plates is assigned solely to the return stroke of the drive, be removed without interference or fall out.

p0008The transport device can in particular have a rotatable about an axis transport wheel, which is provided on its periphery with recesses for receiving the plastic collar of the ferrules and the like via a ratchet mechanism, a flap drive o.. To each one pitch is weiterschaltbar. The transport fulfills different functions. There is even the further transport of the front ferrule from the charging station in the crimping station. At the same time it keeps the first ferrule following ferrules back on tape, thereby preventing a double occupancy in the charging station as well as in the crimping station. The transport wheel engages with its wells advantageous to the plastic collar of the ferrules and not to the metal sleeves of the ferrules so that the metal part for complete machining in the crimping station is free. Through restraining the following ferrules to the plastic collar separating the front ferrule is possible without requiring a separate partition or cutter.

p0009The open position of the pressing jaws associated with the transport device and the condition defined by the closed crimping position of the press jaws crimping station is arranged at a distance from the open position. This distance is used for cutting in the plastic collar. The front ferrule with the pushed-stripped conductor is taken directly from the transport means of the relative thereto arranged pressing jaws opened and transferred under transection into the crimping station.

p0010If the crimping station is located in greater radial distance from the axis of the transport wheel as its depressions, results in a particularly advantageous construction, so that the distance thus formed for separating the ferrule is sufficient from the tape. It is advisable in connection therewith, be movable only to a press jaws radially outwardly migrates during Crimpbewegung against the fixed press jaws. So that the severing is achieved on the one hand, and on the other hand, the pressed ferrule comes free from the region of the transport means, so that the transport can no longer obstruct the removal of the crimped portion.

p0011The transport device may be equipped with an effective blocking device during molding. In order for the following ferrules during pressing into contact on the transport device and thus fixed are held while bringing the front ferrule at a distance and thereby severed their link to the following ferrules, preferably by cunning.

p0012The blocking means may comprise a pivoting lever carrying a projection engaging in a recess of the transport wheel bolts. Also, the movement of the blocking means is associated with the second part of the forward stroke, in such a way that a movement of the transport wheel is prevented during the severing operation and the pressing operation. For the return movement of the swiveling lever and thus the release of the blocking position, a return spring may be provided. The release of the blocking position is synchronized with the opening of the press jaws and thus to the beginning of the return stroke of the actuator.

p0013There is provided a second part of the forward stroke of the actuator associated pivot drive for the pivot lever, on the carried out the pivoting of the pivot lever into the blocking position.

p0014The transport wheel on the one hand and the pressing jaws on the other hand can be arranged parallel to each other, wherein the distance of the parallel arrangement is matched to the length ratios of the ferrules. In any case, the transport device in the field of plastic collar engages, while the press jaws of the crimping over the entire length of the metal part of the ferrules can be effective.

p0015The press jaws and / or the transport wheel can be provided for crimping ferrules other dimensions interchangeably. Of the press jaws, the radially outer fixedly disposed, while the radially inner is moved radially outward.

p0016The drive can be configured as a pincer-like hand drive, a pneumatic or electric drive. It has in any case to a reciprocating movement, ie a forward stroke and a return stroke, said two strokes associated with a Verpreßzyklus in the order listed.

p0017The invention is further explained and described with reference to preferred embodiments. Show it:<dl id="dl0001"><dt>figure 1</dt><dd>a side view of a first embodiment of the tool with essential for the invention parts,</dd><dt>figure 2</dt><dd>a view of the ferrules in strip form,</dd><dt>figure 3</dt><dd>an enlarged view of the tool of Figure 1,</dd><dt>figure 4</dt><dd>a side view of a second embodiment of the tool and</dd><dt>figure 5</dt><dd>a magnified view of the essential parts of the invention, the tool according to FIG. 4</dd></dl>

p0018In the embodiment of the tool of Figures 1 and 3, a tool head 1 in front is seen, the housing 2 has a non-illustrated dovetail groove in the region of an end 3, is attached with the aid of the tool head 1 to a corresponding counter surface 4 a handgun 5 , The hand gun 5 has two hand levers 6 and 7, which are relative to each other. This provides a piston-like extension 8 in operative connection, which can perform a directed in Figure 1 to the left forward stroke when the lever 7 is pivoted in the direction of the hand lever. 6 The reverse is the return stroke of the extension 8 is addressed immediately after releasing the hand lever. 7 The hand gun 5 with the described items constituting a possible drive for the items of the tool head 1. The appendage 8 performs as driving a forward stroke according to arrow 9 and a return stroke opposite from the arrow. 9

p0019Ferrules 10 each have a metallic sleeve 11 and a plastic collar 12. Their mutual connection in strip form is made by a stringing spraying the plastic collar 12 preferably where the metallic sleeve 11 facing away from the area, in which case the connecting webs 13 are formed without significant extent, ie the distance between the plastic collar is practically determined by the outside diameter. The tape of the ferrules 10 is the tool head 1 is supplied through an opening 14 in the housing 2 so that the front end of the tape passes into the region of a transport device 15, which has here as an essential constituent a transport 16 which rotatably mounted about an axis 17 is. The transport wheel 16 has over its circumference in regular division distributed depressions 18 which are matched to the outer diameter of the plastic collar 12 of the ferrules 10 and which are designed and provided for receiving the plastic collars 12th For the drive of the transport wheel 16 and its clock-wise indexing by one pitch a pawl drive is provided with a latch 19 which is operated in the first part of the forward stroke of the extension 8 according to arrow 9 and the sprocket 16 is further turned by one pitch. On the periphery of the transport wheel 16, a charging station 20 is formed in certain relative arrangement, in the region of the housing 2 has a not shown recess for the lateral insertion of a stripped conductor end in the respective ferrule 10th Through the already described indexing of the transport wheel 16 by one pitch the front ferrule 10 is conveyed with the pushed-stripped wire end in the region of a crimping 21st

p0020In the crimping station 21, the pressing is carried out in the area of ​​the metallic sleeve 11 with the stripped wire end. Essential components of the crimping station 21 are a stationary arranged press jaws 22 and an associated movable arranged press jaws 23. The cheek plates 23 is supported by means of a slot 24 on the axle 17 of the transport wheel 16, but behind this in a staggered plane. The press jaws 23 is guided in the housing 2 of the tool head 1 in the direction indicated by arrow 9th Between the rear end 25 of the pressing jaw 23 and the forward end of the extension 8, a distance 26 is provided, which forms an idle stroke, in such a manner that the forward movement of the pawl 19 is limited only to the first part of the forward stroke of the extension 8 to the front ferrule, the crimping station has reached 21, while only then the distance is overcome 26 so that only the movable pressing jaw 23 starts to move according to the arrow. 9 In this case, the connecting web 13 between the front ferrule 10 and the subsequent end sleeve 10 is severed, in particular torn off, this being achieved in that the movable press jaws 23, the front ferrule 10 as viewed from the axis 17 radially pushes outwards, so the normal radius of the depressions is exceeded 18, so that the front ferrule 10 displaced radially outwards. She comes free not only from the following ferrules without a separate cutter would apply, but it is also at the same time a centering movement between the cheek plates 23 and 22 instead. In the second part of the forward movement of the appendage 8 and hence the pressing jaw 23, the press jaws 22 and 23 are closed, which is defined by this closed position, the crimping station 21 and the end of the crimping process. Only in the subsequent return stroke of the press jaws 23 moves opposite back to arrow 9 into the position shown, during this movement also resting the sprocket 16th This position is shown in Figures 1 and 3, one of pressed conductor 27 is indicated by the solid black section in the front ferrule 10th This tabletted conductor 27 is then removed from an opening 28 in the housing 2, which continues also to the charging station 20 or fall out due to gravity and backward movement of the pressing jaw 23rd The parts are shown 29 in the initial position, ie after releasing the hand lever 7 and after return stroke of the pressing jaw 23 and the pawl.

p0021In order to hold the position of the transport wheel 16 in the second part of the forward stroke, equipped with a pivoting lever 29 blocking device 30 is provided. For this purpose, the pivot lever 29 is mounted pivotally about an axis 31 against the force of a return spring 32nd The pivot lever 29 has a sliding surface 33, which is assigned to 34 on a cam slider 35 has a counter surface. The cam slider 35 is in the second part of the forward stroke of the extension 8 also actuated by the latter and shifted in the direction of the arrow 9, so that thereby the swing lever 29 of the blocking means 30 is pivoted in a clockwise direction and with a transverse pin 36 into the relevant recess 18 of the transport wheel 16 blocking engages. Thus, the free rotation of the transport wheel 16 is blocked, so that the subsequent ferrules 10 are held on the periphery of the transport wheel 16, while the front-end sleeve, which is located between the cheek plates 23 and 22, is separated and compressed. In the first part of the return stroke of the extension 8, the return spring 32 29 pulls the pivot lever back into its initial position pulled shown. The blocking position is indicated by dashed lines. The transport 16 may be otherwise still equipped with a stepping mechanism to prevent inadvertent turning back and slip out of the beginning of the band of ferrules 10, as a result acting tension on the band. The band of ferrules 10 is otherwise housed in a magazine 37 or wound there. The ratchet gear for the transport wheel 16 is piloted trained to consciously replace an unused strip of band-shaped ferrules 10 against such another Gößenordnung. Also the sprocket 16 and the cheek plates 22 and 23 are interchangeable to compress ferrules 10 of different dimensions.

p00222 illustrates a piece of a strip of contiguous ferrules 10. Between the plastic collar 12 are end connection webs 13. The metallic sleeve 11 protrude from free. In these two parallel planes arranged engages the transport wheel 16 on to the plastic collar 12, while the cheek plates 22 and 23 is associated with the levels of the metal sleeves eleventh

p0023The illustrated in Figures 4 and 5 show further embodiment of the tool has a tool head 1, which is based on the tool head 1 according to FIGS. 1 and 3 However, this tool head 1 is not attached to a handgun 5, but to a pneumatic actuator 38 here. Also this pneumatic drive 38 has an extension 8, of a forward stroke according to arrow 9 and a return stroke opposite to the arrow 9 can execute when the drive 38 is triggered. The tape of the ferrules 10 with the plastic collar 12 and the metallic sleeve 11 is also withdrawn from the coil-shaped magazine 37 and fed to the housing. 2 It passes through the opening 14 of the housing 2 in the region of the transport means 15 with the sprocket 16, wherein the plastic collar 12 are received by the recesses 18th For the progressive drive of the transport wheel 16 a flap lever 39 is disposed about an axis 40 to pivot on the wedge slide 35 or on a separate from the extension 8 in the first part of the forward actuated part. The tab lever 39 has a transverse pin 41 which engages in the recesses 18 of the transport wheel 16 and further on by one pitch in this operation. The geometry of the tab lever 39 and the pivot lever 29 are coordinated.

<b>LIST OF REFERENCE NUMBERS</b>

p0024<dl id="dl0002"><dt>1</dt><dd>- Tool head</dd><dt>2</dt><dd>- housing</dd><dt>3</dt><dd>- Front side</dd><dt>4</dt><dd>- Counter surface</dd><dt>5</dt><dd>- Handgun</dd><dt>6</dt><dd>- Hand lever</dd><dt>7</dt><dd>- Hand lever</dd><dt>8th</dt><dd>- Extension</dd><dt>9</dt><dd>- arrow</dd><dt>10</dt><dd>- ferrule</dd><dt>11</dt><dd>- Metallic sleeve</dd><dt>12</dt><dd>- Plastic collars</dd><dt>13</dt><dd>- Connecting web</dd><dt>14</dt><dd>- opening</dd><dt>15</dt><dd>- Transport means</dd><dt>16</dt><dd>- Transport</dd><dt>17</dt><dd>- axis</dd><dt>18</dt><dd>- wells</dd><dt>19</dt><dd>- jack</dd><dt>20</dt><dd>- Charging Station</dd><dt>21</dt><dd>- crimping</dd><dt>22</dt><dd>- press jaws</dd><dt>23</dt><dd>- press jaws</dd><dt>24</dt><dd>- Slot</dd><dt>25</dt><dd>- End</dd><dt>26</dt><dd>- distance</dd><dt>27</dt><dd>- Ladder</dd><dt>28</dt><dd>- opening</dd><dt>29</dt><dd>- Pivoting lever</dd><dt>30</dt><dd>- Blocking device</dd><dt>31</dt><dd>- axis</dd><dt>32</dt><dd>- Return spring</dd><dt>33</dt><dd>- sliding </dd><dt>34</dt><dd>- Counter surface</dd><dt>35</dt><dd>- Knife gate</dd><dt>36</dt><dd>- Cross pin</dd><dt>37</dt><dd>- Magazine</dd><dt>38</dt><dd>- pneumatic drive</dd><dt>39</dt><dd>- Flap lever</dd><dt>40</dt><dd>- axis</dd><dt>41</dt><dd>- Cross pin</dd></dl>