US1761482A - Apparatus for manufacturing wire rope - Google Patents

Description

June 3, 1930. J. LAUBENTHAL APPARATUS FOR MANUFACTURING WIRE ROPE Filed basis, was 2 Sheets-Sheet 1 June 3, 1930. JALAUBENTHAL ,7 ,4

APPARATUS FOR MANUFACTURING WIRE ROPE Fi led Dec. 9. 1926 2 Sheets-Sheet. 2

J rfLubeni m/ Patented June 3, 1930 UNITED STATES PATENT OFFICE JOHANN LAUIBENTKAL, OF COLOGNE-MULKEIM, GERMAN Y, ASSIGNOR T FELTEH 8c GUILLEAUMIE CARLSWEBK ACTIEN-GESELLSCIQIAFT, OF COLOGNE-MULHEIM, GER- MANY I APPARATUS FdR MANUFACTURING WIRE ROBE Application filed December 9, 1926, Serial No. 153,675, and in Germany May 8 1, 1926.

J In the manufacture of strands or ropes the individual wires are wound together hehbeen made in order to prevent'or eliminate the springing back of the helically bent wire.

For instance, it has been proposed to Wind the Wires forming the'r-ope individually in a separate machine around the core in the manner of a helical spring and then lay the wires thus treated in the actual strandmg machine to form a wire rope. Quite apart from the fact that this method is very complicated owing to the separate treatment of. each individual wire, the method is not, suitable for preventing internal stresses in the individual wires, since no means are provided for preventing twisting of the wire around its axis. It has further been proposed to cause the wires before being braided or, laid to pass through a former by which is imparted to them in advance the helical line or pitch which they are to have in the finished strand or rope. In this former the wires are bent in such a manner that thein-tendency to spring back is eliminated.

As a former for this purposeit has beenproposed to use a sleeve having a helical groove through which the wire is forced for imparting to it the desired helical form. This however, subjects the Wire while being bent to considerable friction, causing damage to the wire and a reduction of its tensile strength and great wear on the bending device and also entails an increase in the power' A further disadvantage is that this arrangement can only be used with advantage in machines in which the bobbins are arranged one behind the other, as only in such machines there is no appreciable twisting of the wires preliminarily formed in this manner. '7

Fig.1 shows-the device-intended for pre bending wires before they are stranded into the wire rope, which device is provided on the stranding drum.

Fig. 2 shows a representation of one single prcbending member of the preliminary bending head according to Fig. 1.

Fig. 8 shows a stranding machine with the lprebending device provided on the stranding ead.

The present invention relates to an apparatus, which overcomes these drawbacks.

As will be seen from F ig; 1' on the laying headstock a of the rope laying machine ahead I) is provided, between the two discs 0 and e of which there are providedguiding rods which are symmetrical with respect to the axis of the machine and inclined towards the front and around which the wires are preliminarily bent before being laid. The wires d coming from the bobbins arefirst guided through nuts 0 and then around inclined guiding bars f in the interior of the head I), b which means they are bent to the re uired elical form.

ig. 2 is a detailed figure showing this operation. The distance between the front disc 6 and the rear disc 6' can be varied, by the bolts h and the guiding rods 7 being exchanged for shorter or longer ones. By this means the helical form of the wires or thein pitch may be made longer or shorter as required. The nuts c are rotatably mounted in the insertion disc c. As will. be seen from Figure 2, each nut is provided, in addition to the hole for the guiding rod passing through the centre, with an eccentric hole for the insertion of the wire a". By means of a screw provided at z' the nuts can be adjusted.

They are provided for the purpose of preventing the wires being prematurely laid and for introducing'them smoothly into the bending head 6.

ings in the front disc e and, owing to their helical shape, immediately drop around the rope core 9 of hemp or wire into the rope less than in the known kinds of preliminary form k. The laying operation is effected by the laying headstock a and with it the bobbins and the head I) revolve about the axis of the rope or about the rope core g. In the stranding machine shown diagrammatically in Fig. 3, the reels b from which the wires cl are drawn ofl' are rotatably mounted in the stranding drum 3 These reels will always maintain theirivertical position by means of the planet Wheel gearing 2 when the stranding drum rotates". In this way a rotation opposite to the direction of movement of the stranding drum is imparted to the bobbins of the stranding drum for the purpose of avoidingthe twisting of the wires, so that the wires do not experience any axial twisting during stranding. a represents the stranding headprovided on the stranding drum, on which head is secured the prebending device b. It represents the.

stranded wire rope in the finished state. The wire ropes made in this way irom preliminarily bent wires free from stresses are .completely free from twist, in other words,

the wires do not seek to turn in the reverse direction and do not spring out of place and the finished rope does not warp or become kinked.

This apparatus is extremely simple and, since it isnadjustable, may be used for various pitches and thicknesses of wire. Owing to the friction being so slight, the wires are not unduly worn and the power required is formers.

What I claim is:

1. A device for prebending rope Wires in the helical form which they possess in the completed strand or rope without any twisting around the axes of the wires, comprising a prebending head (5) having two discs (6 and e) and smooth guiding rods (f) which are disposed between the said discs and are inclined symmetrically around the axis of the device towards the stranding point, around which rods the wires are intended to be bent whilst passing into the helical form.

2. A device for prebending rope wires as claimed in claim 1, in which the disc (6') of the prebending head has rotatable nuts (0) capable of allowing the wires to be inserted into the prebending head and of guiding them therein.

3. A device for prebcnding rope wires as claimed in claim 1, characterized by this that the prebending head is adjustable iii-the longitudinal direction by exchanging the. guide rods (f) and bolts (h) for rods and bolts of different length.

In testimony whereof I have signed my name to this specification.

J OHANN LAUBENTHAL.

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