DE666798C - Pincer-like device for expanding hose-like or other rubber parts for binding and isolating electrical cables - Google Patents

Description

Pliers-like device for expanding hose-like or other Rubber parts. for binding and isolating electrical lines To the process for binding and isolating electrical cables, through @ .which hose-like Rubber parts are mechanically expanded and after inserting the line the expansion is canceled in such a way that the hose pieces under their own tension the lines enclose, to be able to exercise, various spreading devices have become known. They are as follows: A well-known forceps-like device in which to expand of a piece of tubing two mandrels are provided. Are after attaching the hose section the legs of the pliers pressed together on the mandrels; so stretch the two diverging ones First, spike it apart on both sides. To medium and large lines Cross-sections or those that have a loose braid, freely into the stretched To be able to introduce a piece of tubing, an additional auxiliary fork had to be used the elongated widening caused by the two pliers mandrels into an all-round uniform, viewed from the central axis of the hose section, transformed.

In the case of the pliers-like device, the auxiliary fork is used for thin cables not required, which could lead to 'when treating lines medium and large cross-sections by laying the auxiliary fork this was not at hand. In order to remedy this disadvantage and in a faster way even with thick cables to be able to tie or isolate the cables without an auxiliary fork, the devices were created, which with more than two spreading at the same time Thorns work. However, these in turn have significant disadvantages.

A known spreading device, in the elastic, on one Steel needles attached to a tube-guided slide in holes in a flange are slidably guided at the end of the tube, so that the free needle ends depending on the mutual position of the slide to the pipe either nestled close together or into a mutual position corresponding approximately to the edges of a prism can be spread apart.

With this device, the mandrels have to pass them through the slide To be able to move apart can be very long. The thin thorns can, however bend slightly so that they no longer close in the initial position.

In a further known device, the mandrels are star-shaped displaceable or pivotable in a plane perpendicular to the thorns, lever operated arms, slides or bezels.

This device requires manual operation for the spreading process Use of both hands. In this device with foot operation, it is from Disadvantage that they with the Assembly of switchboards, on machines, on the wall or when the fitter is standing on the ladder, cannot be used.

In both versions, the actuation of the mandrels is still insofar disadvantageous, as spreading apart all thorns over the Um = 'away of the to be moved Arms, diaphragms or slides must be done. Also, the arms, etc. require one Embedding in a two-part housing, which in turn can be provided with pins must in order to be able to move the diaphragms, etc. The whole arrangement requires a great deal Individual parts and is therefore extremely involved.

Another disadvantage is that the expansion limit when fastening the mandrel on segments, slides, etc. is pulled relatively tight, so that lines middle and higher cross sections cannot be treated. To achieve this, the accommodation of the segments, etc. would have to occupy a very large space, whereby the device very unwieldy for practical use and for manual operation in practice will probably not be of any use, and the use is likely to be of slides with this device will not be possible at all, as this is a sufficient spreading process is not achievable.

In many cases, even with multi-core cables, the individual connection cores must to be exposed over a long distance to keep them distant from each other To be able to attach connection points. However, the binding or isolation prepares Difficulty at the bifurcation of the veins because the moving veins are within of the narrow pipe both damming and rubbing as well as in the case of lines with previously attached Do not allow cable lugs to pass through at all. It is also disadvantageous that in the previously described binding or. Isolation process the obstructing line in their Must be retracted lengthways through the pipe with loss of time, the thorns making this work even more cumbersome.

The invention while maintaining the proven basic structure the well-known two-mandrel pliers created a three-mandrel device, its three mandrel parts At the same time you can diverge in different directions by doing so form the corners of an approximately equilateral triangle and so one over the original Open the closed mandrel and widen the hose section. According to the invention is the Spike split lengthways into three parts, two of which on a pincer-like Device provided and spreadable by approaching the legs of this device are. The third part of the mandrel, the one at rest on or between the other two Parts of the mandrel is, however, when these parts of the mandrel are spread apart from them moved, in one to the spreading direction of the two, other mandrel parts approximately vertical direction. The third mandrel can be attached to a sliding rod o. The like. Sitting by a toggle linkage on the legs of the pliers-like Device is hinged. A spring is expediently provided on the lever linkage attacks and after releasing the legs, the device automatically returns to the rest position returns.

In the drawing, an embodiment of the invention is for example shown.

Fig. I shows the device in a closed state.

Fig. 2 shows it in the open state.

The forceps-like device has two legs in a manner known per se i and 2 and two jaws 3 and q. Which are rotatable about a bolt 5 so that they open when the thighs are squeezed together. At the ends of the jaws 3 and q. sit two mandrel parts 6 and 7. The jaw ends hit the device in the closed state (Fig. _) not quite together, they rather leave you Gap free in which a third mandrel part 8 is located at the end of a rod is attached, which is displaceable in its longitudinal direction. The other end of the Rod 9 is in the knee joint = o a toggle linkage consisting of two levers ii and 12 hinged. The lever ii is at 13, the lever 12 at i ¢ with the legs i and 2 articulated. A spring 15 is on one of the levers of the toggle linkage 1i, 12 and also attached to the middle pliers part.

When the device is closed (Fig. x) not to lie between the thorns 6 and 7, as shown here. He can also be arranged below these mandrels, which would then collide.

If a tubular rubber part is to be expanded, it will as shown in phantom at 16 in Fig. i, over the three mandrel parts 6, 7 and 8 pushed. Then the two legs i and 2 of the device, which is conveniently in one hand can be held, by squeezing it closer together, so become the two mandrel parts 6 and 7, as Fig. 2 shows, spread apart by move in opposite directions. At the same time the knee joint io of the toggle linkage pressed down. This also causes the push rod 9 moved downwards so that the third mandrel part 8 moves away from the mandrel parts 6 and 7 is, in one to the spreading direction of these two mandrel parts approximately perpendicular standing direction. As a result, the rubber part 16 is expanded as it is in Fig. 2 is shown so that the line can be conveniently pushed into the rubber piece can.

The spring 15 causes the automatic return of the pliers-like Device in the rest position after the legs z and 2 are released.

In contrast to the intricately constructed known facilities with more than two thorns is in the tool according to the invention as a result of actuation of the third part of the mandrel by the same pliers legs that spread it apart the first two parts of the mandrel cause the device to be operated with one hand. The pliers legs allow due to the relatively large leverage full effect of the force of the hand. The arrangement of the mandrel parts enables the new device to spread the tubular rubber part particularly wide apart, so that the new three-mandrel device can easily be used for setting and isolating Lines of medium and larger cross-sections can be used. It is also advantageous that the lines are not obstructed by a pipe or by the holes in housing parts are. Rather, after the setting and isolation process, they can easily be removed from Device are freed, so that a cumbersome and therefore time-consuming withdrawal the line is no longer available.

The device according to the invention is therefore characterized by simple Appropriate structure, easy operation and favorable mode of action compared to the known devices.

Claims (1)

PATENT CLAIM: Pliers-like tool for expanding hose-like or other rubber parts for binding and insulating electrical cables by one of the clear widths of the tube piece to be expanded with the smallest diameter corresponding mandrel, which is split lengthways into three parts, of which the two outer ones on the legs of a tool that can be moved apart attached perpendicular to its plane of movement and its inner part at a through a toggle linkage, which is hinged to the movable legs, perpendicular attached vertically to the spreading direction of the two other mandrel parts movable rod is.