Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
CABLE BRACKET FOR FASTENING AND MOUNTING HIGH-FREQUENCY RADIO-TELEPHONE CABLES AND/OR FEEDERS
Document Type and Number:
WIPO Patent Application WO/2003/032437
Kind Code:
A1
Abstract:
Subject of the invention is a cable bracket for fastening and mounting high-frequency radio-telephone cables and/or feeders, having fastening threaded metal clamp and threaded bolt serving for fastening to the bearing structure, with releasable joint in the threaded hole, threaded bar fastened with a threaded nut, at least one plastic clamp threaded on the bar and a threaded nut fastening plastic clamp to the other end of the threaded bar and advantageously underlay below it. It is characteristic of the invention that the fastening metal clamp (1) has on its upper part of reversed U-shape closed, on its two opposite sides open, on the other two sides closed shafts (11) are lightly widening from above downwards and has at least two, advantageously three threaded holes (12) making possible on its upper part and on its sides opposite each other any direction of mounting, on one shaft (11) of its open sides there is a rack (12) serving for sure fastening, the number of plastic clamps (3) is advantageously four and each of the plastic clamps (3) consists of two parts symmetrical to each other and having a hole (31) serving for threading onto the threaded bar (2), its part serving for clamping the cables is of half-cylindrical shape and is provided with inner ribs (33) and on its external faces there are anti-slip and stiffening external ribs (34).

Inventors:
SZABO FERENC (HU)
Application Number:
PCT/HU2002/000060
Publication Date:
April 17, 2003
Filing Date:
June 27, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
SZABO FERENC (HU)
International Classes:
F16L3/08; (IPC1-7): H01Q13/20; F16L3/10; F16L3/237; H01Q1/12; H02G3/30
Foreign References:
US3146982A1964-09-01
GB2351117A2000-12-20
GB1598046A1981-09-16
US3856244A1974-12-24
GB451945A1936-08-12
US5827026A1998-10-27
US4728235A1988-03-01
Attorney, Agent or Firm:
Kormos, Ágnes (Váci út 78/b Budapest, HU)
Download PDF:
Claims:
PATENT CLAIMS
1. Cable bracket for fastening and mounting highfrequency radiotelephone cables and/or feeders, having a fastening metal clamp serving for fastening it to a bearing structure and a threaded bolt, with releasable binding in the threaded hole of the fastening metal clamp, a threaded bar fastened with a threaded nut, at least one plastic clamp threaded onto the threaded bar and a threaded nut fastening that plastic clamp with releasable binding to the other end of the threaded bar and advantageously metal underlay under it of which is characteristic that the fastening metal clamp (1) has on its upper part of reversed Ushape closed, on its two opposite sides open, on the other two sides closed shafts (11) are lightly widening from above downwards and has at least two, advantageously three threaded holes (12) making possible on its upper part and on its sides opposite each other any direction of mounting, on one shaft (11) of its open sides there is a rack (13) serving for sure fastening, the number of plastic clamps (3) is advantageously four and each of the plastic clamps (3) consists of two parts symmetrical to each other and having a hole (31) serving for threading onto the threaded bar (2), its part serving for clamping the cables is of halfcylindrical shape and is provided with inner ribs (33) and on its external faces there are antislip and stiffening external ribs (34).
2. Cable bracket according to the claim point 1 of which is chqracterisffc that the material of the fastening metal clamp (1) is a rustproof, advantageously 4 mm thick sheet, advantageously K036, the diameter of the threaded hole (12) is 6 to 8 mm, advantageously 6,4 mm, advantageously M8 thread cut in, and the shafts (11) of tooth (14) of the rack (13) are arranged advantageously in an angle of 90 grades to each other.
3. Cable bracket according to the claim point}, of which is characteristic that the material of the plastic clamp (3) is of high strength and elasticity, heatresistant, independent of temperature changes, plastic material, resistant to UVradiation, advantageously makrolon and the diameter of the hole (31) amounts to practically 8mm.
4. Cable bracket according to any of the claim points 1 to 3, of which is characteristic that a plastic clamp (3) is of simple formation serving for clamping one bundle of cables.
5. 1 Cable bracket according to any of the claim points 1 to 3, of which is characteristic that a plastic clamp (3) is of double formation serving for clamping two bundles of cables.
6. Cable bracket according to any of the claim points 1 to 4, of which is characteristic that the hole (31) of the plastic clamp (3) of simple formation emerges from the face of the ribs around it is advantageously in a height of 1 mm and the radius (R1) of the part of the halfcylinder part near to the hole (31) is forger than the radius (R2) of the part further from the hole (31).
Description:
CABLE BRACKET FOR FASTENING AND MOUNTiNG HIGH-FREQUENCY RADIO-TELEPHONE CABLES AND/OR FEEDERS Subject of the model for use is a cable bracket for fastening and mounting high- frequency radio-telephone cables and/or feeders. The cable bracket according to the model for use can be applied for mounting 1800 MHz radio-telephone system where between the equipment and the antennas there are 7/8"coaxial cable wave-guides. For shaping clamps serving for encircling cylindrical objects, pipes, lines, cables and for fastening them to something there are many kinds of solution known.

In distribution plants polyamide fibbers as well as clamp bands with orifices of specified intervals accepting locking screws are used for fastening and connecting cables. A disadvantage of fastening with polyamide fibbers is that it is labour- intensive while a deficiency of the solution with clamp band is that stability of connection will be specified by the spacing of orifices.

In the Hungarian patent specification register number 187 817 another known fastening clamp is to be found. With this solution the clamping band has a saw-tooth rack on the inner face of the loop formed by it while retaining tongue has a retaining rack fitting into the saw-tooth of the clamp band stretching the clamp band onto the guide face of the orifice receiving the locking yoke clamp bend while the free end of the retaining tongue is shaped as an opening extension. This solution has the deficiency of taking a relatively big place in consequence of high compressive stress of the locking yoke as well as that the locking tongue may be unlocked lightly even by itself e. g. under the influence of repeated folding so that it does not ensure a stable joint. Another deficiency is that because of location of the retaining tongue it can be made only with limited tooth shape and does not grant self-closing, its production is expensive, thus uneconomical The Hungarian patent specification register number 194 446 makes known a bearing and stressing clamp serving mainly for fastening cables and lines. The essence of this solution is that the U-shaped receiving part has a stressing-fastening member fitting to the inner face of the open part of the U-configuration and for holding up the clamp it has a foot part. In addition on the inner face of the U-configuration made of flexible material the rack bending down towards the foot part is arranged between the two shaft parts, can be impressed in axial direction of the clamp straight or diagonally, at the ends of its stressing-fastening member of flat shaping there is a rack in direction opposite to the rack of the shaft part. The racks are arranged on the surface of a cylinder jacket in order of making possible twisting.

This solution serves for fastening one or several cables with different diameters in a single clamp in a specified direction and for releasing if needed.

The model for use aims at putting an end to deficiencies in known solutions and bringing about a cable bracket making possible fastening advantageously radio- telephone cables, feeders,, mounting it to brackets made out of whatever building units whether outside or inside, in conformity with mechanical, electrical, environmental requirements, regardless of any environmental temperature changes, being retentive, resisting to UV-radiation, mountable in whatever direction and receiving several cables without damaging, with a low place demand, to be mounted surely and produced economically.

The model for use is based on the consciousness of the fact that the cable bracket be composed of a metal clamp fastening the cable bracket, of a threaded bar, of at least one plastic clamp where the fastening clamp is of reversed U-shape, on the top part and on its two opposite sides open, at the other two sides closed, with shafts downwards lightly widening, at least two, more expediently three threaded holes at the sides closed opposite each other and with a sure rack on one of the shafts of its open sides, the length of the threaded bar can be changed depending on the number of plastic clamps, the plastic clamp is simple (suitable for receiving one bundle of cables) or double (suitable for receiving two bundles of cables and consists of to parts symmetrical to each other having a hole for attaching on the threaded bar while its part for receiving the cables is of half-cylindrical shape, with ribs hampering its displacement and with anti-slip and stiffening ribs so that high- frequency radio-telephone cables and/or feeders can be fastened and mounted according to the requirements of related standards, making possible whatever direction of mounting, receiving several cables at once with low place demand, mountable surely and producible economically.

The subject of the model for use is thus a cable bracket for fastening and mounting high-frequency radio-telephone cables and/or feeders. The cable bracket according to the model for use has a metal clamp serving for fastening to the supporting on the surface of a cylinder jacket structure and threaded metal screw, a threaded bar fastened by a threaded nut with releasable joining in the threaded hole, at least one plastic clamp and a threaded nut fastening the plastic clamp to the other end of the threaded bar and expediently a metal underlay.

The cable bracket is characterized by having at least two, expediently three threaded holes on the upper part of the reversed U-shaped part of the fastening metal clamp open at the two opposite sides and closed on the other two sides, with shafts lightly widening from above to down, with a rack on one shaft of its open sides serving for sure fastening. The length of the threaded bar is variable depending on the number of plastic clamps, the number of the plastic clamps are expediently four, each of the plastic clamps consists of two parts symmetric to each other and has a hole serving for threading it to the treaded bar. Its part for clamping cables is half- cylinder-shaped and has inner ribs hampering displacement, on the outer part anti- slipping and stiffening outer ribs.

The fastening plastic clamp is characterized of being made of stainless material, expediently of plat of 4 mm sheet thickness, practically K036, with a hole diameter of 6 to 8 mm, practically 6,4 mm, with practically M8 thread cut in it and with shafts of teeth of the rack practically at an angle of 90 degrees to each other.

The plastic clamp is characterized of being able to apply even by itself for fastening and mounting, its material is of good strength and elasticity, it is a plastic material, resistant to UV-radiation independent of temperature changes, advantageously PC 1418. The hole has a diameter of practically 8 mm..

The plastic clamp according to the model for use is of simple or double formation.

The plastic clamp of simple formation is characterized by being shaped higher by 1 mm then the face of the ribs around it for hampering to compress cables to be fastened and forms a distance opening when lightening the fastening threaded nut at the other end of the threaded bar in a way that the radius of the semi-cylindrical part near to the hole is more than the radius farther from the hole.

The model for use is presented in detail on the basis of drawings as follows : in fig. 1 the axonometric drawing of one of the shapes of implementation of the cable bracket according to the model for use, in fig. 2 the front view of one of the examples of implementation of the fastening metal clamp, in fig. 3 the B-B-section of the fastening metal clamp according to fig. 2 in fig. 4 the top view of one of the one of the examples of outside of one of that parts of the plastic clamp, in fig. 6 the B-B section of the plastic clamp in fig. 5, in fig. 7 the A-A section of the plastic clamp in fig. 5, in fig. 8 the top view of inside of one of the examples of implementation of the plastic clamp can be seen, in fig. 9 the axonometric drawing of the shape ox implementation of the cable bracket with a plastic clamp of double forming can be seen.

In fig. 1 the axonometric drawing of an example of implementation of the cable bracket according to the model for use can be seen. The cable bracket has metal clamp 1, threaded bar 2 and advantageously four plastic clamps 3. The fastening metal clamp 1 is of reversed U-shape, with two, properly three threded holes-12, on the above part closed, on two opposite sides open, on the other two sides closed, on the upper part and on the two closed sides opposite each other making possible optional direction of mounting. There is a threaded metal screw 17 serving for fastening into the threaded hole 12 on one of the closed sides to the supporting structure. In the threaded hole 12 on the upper part of the fastening metal clamp 1 the threaded bar 2 is screwed in and fastened by the threaded nut 15 to the fastening metal clamp 1. On the threaded bar 2 four plastic clamps 3 are advantageously threaded which are fastened to the other end of the threaded bar 2 with a releasable joint advantageously by the threaded nut 15 and the underlay 16 below it. Length of the threaded bar 2 may be varied depending on the number of plastic clamps 3 while the length for the example of implementation in fig. 1 is defined in a way that it suit for threading four plastic clamps 3. Each of the plastic clamps 3 are composed two parts symmetrical to each other. In the figure it is well to be seen the distance opening 32 between the two parts, the half-cylindrical shape of the part serving for clamping cables provided with the inner ribs 33 hampering displacement as well as shaping of the external anti-slip ribs 34.

In fig 2 the front view of an example of implementation of the fastening metal clamp 1 is to be seen. The shafts 11 are from above downwards lightly widening, formed practically at an angle of six grades while the threaded hole 12 is arranged on its upper part and on the opposite closed side in the middle, and the centre of the threaded hole 12 is advantageously 14 mm far from the base point. The upper part of the fastening metal clamp 1 are rounded towards the shafts 11, advantageously by a radius of 16 mm, the rack 13 serving for sure fastening is arranged on the inner part of one of the shafts 1 1 of their open sides, and the shafts 11 of the tooth 14 are closing advantageously an angle of 90 grades with each other while the number of teeth amounts to eight in an advantageous implementation.

In fig. 3 the section B-B of the fastening metal clamp 1 in fig. 2. can be seen. The diameter of the threaded hole 12 is advantageously 6,4 mm in which advantageously a thread M8 is cut in.

In fig. 4 the top view of an example of implementation can be seen, on the upper part with a threaded hole 12.

In fig 5 the top view of the example of implementation of the outside of one part of the plastic clamp 3 is to be seen. The plastic clamp 3 has a hole 31 the diameter of which is advantageously is 3 mm, and around the hole 31 there are external ribs 34 perpendicular to the longitudinal and axial horizontal axis. The upper part is provided also with external ribs 34. The number of them amounts to eleven with an advantageous solution while they have the function of hampering slippage.

In fig. 6 the B-B section of the plastic clamp 3 in the fig. 6 is to be seen, where for shaping the distance opening 32 the R1 radius of the half-cylindrical part of the hole 31 is larger than the R2 radius of the part farther from the hole 31. With an advantageous implementation of the plastic clamp 3 R1 is 13,75 mm, and R2 13,32 mm.

In fig. 7 the A-A section of the plastic clamp 3 in fig. 5 can be seen where the distance opening 32 is of lightly decreasing measure from the external part towards the half-cylindrical part while the measure of decreasing amounts to m=2 mm.

In fig. 8 the top view of one example of implementation of the inner part of one part of the plastic clamp 3 is to be seen. Beside the hole 31 the half-cylindrical part serving for clamping cables provided with the inner ribs 33 hampering displacement is well to be seen. The hole 31 emerges in a height of about 1 mm from the inner ribs 33 for hampering compression of cables to be fastened. The number of the inner ribs 33 is advantageously, with a width of 2 to 3 mm.

In fig. 9 a cable bracket provided with two double plastic clamps 3 is to be seen. It has the advantage of saving place since without any converting a double quantity of cables can be arranged. Its production is cheaper than using 2 of simple ones.

When expending no new bearing structure is needed, and all the eight bundles of cables can be laid on the existing one since four double plastic clamps 3 can be arranged advantageously on a threaded bar 2.

It can be seen in the figure that because of being symmetrical the distance opening 32 in fig. 1 is not needed since at compressing the plastic clamp 3 same forces are working everywhere so that the bundle of cables may not get damaged. The inner rib 33 in the figure makes possible that it can be used for individual ribbing any kind of bundle of cables without damaging cables when compressing.

For one advantageous implementation of the cable bracket according to the model for use-where the number of plastic clamps 3 is four-it can be used well for installing 900 to 1800 MHz radio-telephone systems as well as for further USB systems, where cables and/or feeders are to be fastened and mounted and 7/8"coaxial cable wave guides are applied. Should the threaded bar 2 been screwed in the threaded hole 2 in the middle of the upper part of the fastening metal clamp 1, cables and/or feeders can be fastened by a 3 perpendicular leading in the plastic clamps 3. With the plastic clamp 3 according to the model for use 7/8", 1/2"and 1'/" three feeders can be fastened and mounted. Otherwise the plastic clamp 3 can be used by itself for fastening and mounting cables and/or feeders.

In a simple example of the cable bracket according to the model for use the 1 fastening metal clamp is a deep-drawn toothed clamp with three M8 thread making possible in this way whatever direction of mounting, having as material K036 rust- proof plate with a sheet thickness of 2 mm while the 2 threaded bar K036 rust-proof stock with longitudinal measure to be varied. The binding members are one hexagon bolt M8 x 45, two hexagon bolts M8, one M8 metal underlay. The material of the 3 plastic clamp is makrolon PC 1418 made by injection molding in die and advantageously can be applied four of it at once in a bracket.

With a cable bracket according to the model for use about 200 m cables can be fastened to a 50 high steel bearing structure weighing nearly 180 kp and immobility of the mounted cables is sure even in case of strong winds. Mounting distance of cable brackets is perpendicularly 0,9 m.

The cable bracket according to the model for use implies the target of fastening high-frequency radio-telephone cables and feeders to a bearing structure made of whatever structure members whether outside or inside according the mechanical, electrical and environmental requirements in related standards, retentively, resisting to UV-radiation, making possible whatever direction of mounting, being suitable for clamping several, advantageously four cables at once without damaging, simply and jut surely mountable and being produced economically.

LIST OF DESIGNATIONS fastening metal clamp 11 shaft 12 threaded hole 13 rack 14 tooth 15 threaded nut 1 6 underlay 17 threaded metal screw 2 threaded bar 3 plastic clamp 31 hole 32 distance opening 33 inner ribs 34 extemal ribs