DE474991C - Spreading device for expanding and pulling hose-like, in particular elastic insulating parts onto electrical lines - Google Patents

Description

Spreading device for expanding and pulling hose-like, in particular elastic insulating parts on electrical lines the subject of the invention forms a spreading device for expanding and pulling hose-like, in particular elastic insulating parts on electrical lines.

The well-known nose pliers-like tools have the disadvantage that they expand the insulating hose unevenly (oval), which makes it work becomes very difficult. In order to be symmetrical to the required for round lines To get opening, a further expansion must be made. By means of a The fork causes the other hand to stretch the hose perpendicular to the first stretching direction, whereby the square position is determined. Since both hands are required for this are, the handling of the tool is made more difficult. Also, the thighs must of the pliers are always opened until the clamping spring jumps in and the position is fixed. In the other case, if the large spread is not carried out the legs of the pliers continuously through the same process of square opening one hand can be squeezed until the insulation is peeled off. Through this the work is also made very difficult, so that -the great advantages of isolation face great difficulties with elastic hoses.

The disadvantages mentioned are alleviated by the subject matter of the invention avoided, according to which several elastic steel needles attached to a holder guided so slidably in bores of a guide displaceable relative to the holder are that the free needle ends depending on the mutual position of the holder for guidance either nestled close together or approximately in one of the edges of one Prism corresponding mutual position are spread apart. Another one The feature of the invention is that the one carrying the needles is on the guide displaceable holder in any position and especially when the needles are open the transverse tension of the needles is held on the guide. The latter is hollow designed to be able to pass through the line to be isolated.

The subject matter of the invention is illustrated in the drawing.

Fig. T is a longitudinal section, Fig. Z is a plan view of the device when closed.

Fig. 3 is a longitudinal section and Fig. Q. a plan of the device in the open state.

A square bushing b is attached to a handle a, along which a slide e is movable, to which four steel needles d are attached. The free - end of the sleeve is crimped or b provided with a flange having four holes in which the needles are slidably guided. The steel needles are shaped in such a way that their free ends converge to a point when the device is closed, in order to facilitate the pushing on of a hose-like insulating body c. If the slide c is moved towards the handle a (Fig. 3 and q.), The needles take hold. part of this movement, the free ends of the needles occupying the mutual position of the edges of a prism, the plan of which is determined by the holes in which the needles are slidably guided. The insulating body e is spread wide apart in a corresponding manner. Since the sleeve b and the handle a are hollow, the line can be pushed into the tubular insulating body from either side. After inserting the line, the slide c is brought into the position shown in Fig. I, so that the needles close again. After the device, the insulating body then rests firmly and tightly on the line.

Claims (3)

PATENT CLAIMS: i. Spreading device for expanding and pulling open hose-like, especially elastic insulating parts on electrical lines, characterized in that several elastic steel needles attached to a holder (c) (d) in holes of a guide bushing (b) which can be adjusted relative to the holder in this way are slidably guided that the free needle ends depending on the mutual position of the holder to the sleeve either nestled close together or approximately in a mutual position corresponding to the edges of a prism spread apart are. 2. Spreading device according to claim i, characterized in that the holder (c) forms a slide which is movable on the guide bushing (b) and which in every position and especially when the device is open due to the transverse tension of the needles (d) is held by the sleeve (b). 3. Spreading device according to claim i and 2, characterized in that the guide bush (b) and the handle (a) are continuously hollow so that the line to be isolated can be passed through.