MXPA01005071A - A suspension device having a cable carriage integral therewith - Google Patents

Abstract

The present invention relates to as a combined cable suspension device and cable carriage. In order to enable a cable suspension device (1) to be used also as a cable carriage, the suspension device has been provided with a rotatable cable support (2) which when the device shall function as a cable carriage can be moved upwards in said device in order to provide a rotatable support for the cable when said cable is moved out of contact with the cable abutment surfaces (3) in the suspension device. This type of device that incorporates a cable carriage facility enables a cable to be drawn and secured and released as required.

Description

A SUSPENSION DEVICE WHICH HAS AN INTEGRAL CABLE SUPPORT WITH THE MIS MO FIELD OF THE INVENTION The present invention relates to a combined cable suspension device and a cable support, preferably for heavy cables. The overhead cables, or self-supporting cables, are suspended from poles with the help of suspension devices attached to them. Cable supports in which a cable can be pulled forward when it is raised are used to extend the cables to the suspension devices mounted on the poles.

BACKGROUND OF THE INVENTION Cables, such as elevated self-supporting cables, reinforced cables with helically wound reinforcements, transmission lines, etc., are normally secured to poles with the help of suspension devices. Such devices are available in different forms. A main requirement of a suspension device is that it does not damage the cable suspended in it. Among other things, the pressure acting on the cable should not be so large that it permanently deforms the cable.

Different types of sleeves are fitted to the cable, with the intention of increasing the splicing surface of the cable and further reducing the pressure on it. The suspension device must also be easy to assemble in a short time and it must be effective in terms of cost. Consequently, a suspension device is required that incorporates a number of functions and facilities that will eliminate the use of tools, auxiliary rollers and lifting devices in assembly operations.

BRIEF DESCRIPTION OF THE INVENTION With the intention of allowing a cable suspension device to also be used as a cable support, the suspension device has to be provided with a rotating cable support surface, such as in the form of a movable roller, which when the suspension device is operating as a cable support it can move vertically in said suspension device to provide a rotating underlay surface that supports the cable when it is released from the splice surface of the suspension device. A suspension device including such a coercion cable holder allows a cable to be stretched and fixed and released easily as required. A sleeve can be fitted around the cable when required, without the need to lift the cable with the help of an external lifting device, such as a winch, a pulley rig or corresponding lifting means. The invention will now be described in greater detail and with reference to the preferred embodiments thereof and also with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 illustrates a combined cable suspension device and the cable support according to the invention. Figure 2 is a side view of the combined suspension device and the cable support. Figure 3 is a cross-sectional view of a lower magiite belonging to the combined suspension device and the cable support according to the invention. Figures 4A-D show different working positions of the combined suspension device and the cable support according to the invention.

DESCRIPTION OF THE PREFERRED MODALITIES The suspension device 1 and its built-in cable support function to meet all the requirements related to the support capacity and flexibility of a cable. In the illustrated case, the rotating support that forms part of the cable support function in the suspension device has the shape of a roller or wheel 2 having elongated end regions that allow the cable to be centered in the suspension device when Pull the cable in and out of that device, plus a cable support function; see Figures 1 and 2. In order to prevent the cable from being subjected to excessively high pressures, it is necessary to have the ability to move the roller or wheel away from the cable after the cable has been stretched in or out of the device of suspension, so that the cable is able to rest on a wider splice surface. In accordance with the present invention, this wider splice surface is in the form of one or two open lower sleeve forming portions 3 positioned on respective sides of the wheel or roller and movably connected to the suspension device. These sleeve forming parts are positioned in a manner that allows them to be retracted when the cable support function is to be used, to provide space for the cable to move freely. In order to allow the cable to be secured in the suspension device, the device includes on both sides of the roller or wheels on the lower sleeve forming portions, the upper sleeve forming portions 4 which are pivotally connected to the parts of the upper sleeve. bottom sleeve formation and which can be removed over the lower sleeve forming portions 3 to secure a cable between the lower sleeve forming parts and the upper sleeve forming parts. As the cable is stretched in or out of the suspension device, the rotary shaft 5 of the wheel or roller 5 is fixed at the upper limit of a slot 6. The ends of the wheel shaft can be provided with threaded joints to secure the Wheel axle in this position. The open lower parts of the cable securing sleeve are suspended on pins 7 accommodated in grooves or channels sloping downwardly 8 on the lower parts of the cable securing sleeve, which are substantially free of the wheel. When cable removal is completed, the lower parts of the sleeve are rotated and pushed into their respective grooves or channels 8 until they firmly engage in a notch 9 or flare provided in the groove 8 to receive the pins 7 and allow the parts of the groove 8 to be received. lower cuff bow to a certain degree; see figure 3. When necessary, the sleeves can be applied directly to the cable or alternatively the lower and upper cable securing parts can be provided with a suitable cover adapted for the cable in question. When the cable has been loosened from its upper position, it will fall on the lower sleeve parts 3 inserted below it. The upper sleeve parts 4 are removed on the lower sleeve parts and the rope is finally secured by securing the upper sleeve parts to the lower sleeve parts with the help of screws 10, for example. In order to avoid a cable suspension device that includes only a lower sleeve part and an upper sleeve part to tilt, as shown in dotted lines in Figure 2, the suspension device is provided with means, such as counterweight or similar, which works to balance the position of a mounted suspension device and the cable transported by it. Figure 3 is a cross-sectional view of the lower sleeve part 3 and more clearly illustrates the slot 8 and the similar notch or flare 9 for receiving a pin 7 in the pivotal locking position of the lower sleeve part. The lower sleeve portions can be easily positioned according to the angle of the wire through the middle part of the pin receiving groove in said groove. This allows all the splicing surface to be used optimally both in a straight line and in angulated positions and in the event that temporary loads caused by a tree fall on the cable. A personal safety factor achieved when mounting a cable according to the invention is that the cable never needs to be released from the suspension device after it is finally secured therein. Due to its simple construction, the combined cable suspension device and the cable support according to the invention can be easily dismantled. After having removed the wheel axle 5 and the pins 7 on the lower sleeve part, the upper part of the suspension device can be opened and a cable that has already been stretched can be inserted or removed from the device. After having inserted the cable into the suspension device the wheel and the parts of the lower sleeve are replaced and secured in their respective positions, thereby providing a functional suspension device that allows the placement of the cable therein to be adjusted and the cable is then secured in said device. When the outer sides 11 of the groove in the device are not flat, for example they are made of downwardly sloping and downwardly sloping parts, it will be necessary to loosen the screw gasket on the wheel axis gradually so that the shaft is capable of move towards the slot. This means that the nut 12 of the screw joint must be removed or loosened, to a greater degree than it is intended to move the wheel axle in the slot. This can provide the successive reduction of the wheel and the wheel movement controlled therewith, which can be very useful when a load of several tons acts on the wheel and the suspension device in a cable stretching operation. When the device is misplaced in relation to the intended cable direction, it may also be beneficial to have the ability to lower the wheel gradually in order to correctly position the suspension device. The sides inclined outwardly of the slot will also allow the bottom of the slot 13 to become wider, thereby reducing the tension on the bottom of the slot in case the wheel axle is not in the slot. In the cable stretching mode shown in Figure 4A, the suspension device functions only as a cable holder with the option of pulling the cable out of the device. The wheel or roller 2 of the device 1 will be in its upper position and the lower sleeve forming splicing surfaces 3 will be removed. In the cable splicing surfaces of the magiite parts will hang therewith obliquely from the device in their respective slot or channels to completely release the wheel 2 in the wire stretch mode of the combination. The wheel can be locked in this position with the help of, for example, a friction joint which can be adjusted directly on the wheel axle and which consists of a nut screwed onto the end thread of the axle. Alternatively, the wheel can be locked in said position by other means, such as a detent key, a locking pin, hook or slot. The connecting surfaces of the lower and upper sleeve portions can be locked, for example, with a cable or plastic band capable of holding the sleeve parts together in the hanging position downwards. Figures 4B and C show the mounting and fixing position of the device, in which the lower sleeve parts have been pushed into their respective grooves or channels 8 until the central positions remain inside, and in which the additional sleeves that can to be required have been fitted around the cable placed in the device on the cable splicing surfaces of said lower sleeve parts. When the wheel or roller 2 is released and remains within the slot or channel 6, the cable, at the same time, will move in splice with the connecting surfaces of the lower sleeve parts. Figure 4D illustrates the state of the device when the upper magiite portions have been lowered onto the cable. The upper sleeve parts are then secured to the lower sleeve parts by means of the screw seal 10 for example. As a result of the configuration of the splicing surfaces, the surfaces are able to automatically place themselves along the lines followed by the cable in said device as a result of the pivotal suspension of said lower sleeve portions, such as the straight line or in a line curvature in the vicinity of a pole if a tree falls on the cable and with the same causes it to flex. As a result, additional bending stresses will not be applied to the cable and the lower splicing surface can be used optimally. This results in a lower average value of the mechanical stresses and stresses on the cable, since the entire splicing surface is constantly used. It will be understood that the invention is not restricted to the above-described and illustrated embodiments thereof and that modifications may be made within the scope of the following claims.

Claims (4)

1 . A device for suspending combined cable and cable support comprises a rotary cable support means that can be raised and lowered, which allows a cable to rest therein to be stretched forward in said suspension device, in which at least one lower part movably connected to the suspension device is pivotally connected to an upper part, wherein the upper and lower parts function to secure a cable therebetween when they are joined in a closed state, characterized in that the supporting means Rotary cables are provided with a rotary shaft, the ends of which are provided to be able to move in slots of the suspension device for the placement of the rotary support means in the suspension means, in which the lower part includes grooves or channels adapted to co-act with the pins on the suspension device, wherein the lower part of the It can take different positions in relation to the suspension device, so that the free hanging vertical position or a generally guided horizontal position, in which the cable can be secured between the lower and upper parts.

2. A combined suspension device and cable support according to claim 1, characterized in that the slots or channels include a widening into which the pins are hooked in the mounting position, to allow the cable securing position. be tilted in a way that adapts to the line angle of the cable.

3. A combined suspension device and cable support according to claim 1, characterized in that the end sides of the grooves are inclined to allow the successive descent of the rotating cable support.

4. A combined suspension device and cable support according to claim 1, characterized in that the grooves have a wide bottom. SUMMARY The present invention relates to a combined cable suspension device and a cable support. In order to allow a cable suspension device to also be used as a cable support, the suspension device has been provided with a rotating cable support which when the device is to function as a cable support can move upwards in said device in order to provide a rotary support for the cable when said cable is moved out of contact with the cable splicing surfaces in the suspension device. This type of device incorporates a cable support facility that allows a cable to be stretched and secured and released as required.