WO2016165819A1 - Simplified device for the ground connection of coaxial cables - Google Patents

Simplified device for the ground connection of coaxial cables Download PDF

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Publication number
WO2016165819A1
WO2016165819A1 PCT/EP2016/000593 EP2016000593W WO2016165819A1 WO 2016165819 A1 WO2016165819 A1 WO 2016165819A1 EP 2016000593 W EP2016000593 W EP 2016000593W WO 2016165819 A1 WO2016165819 A1 WO 2016165819A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrical contact
cable
ground connection
internal electrical
arms
Prior art date
Application number
PCT/EP2016/000593
Other languages
French (fr)
Inventor
Alberto VARALE
Original Assignee
Fi.Mo.Tec. S.P.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fi.Mo.Tec. S.P.A. filed Critical Fi.Mo.Tec. S.P.A.
Priority to PL16718204T priority Critical patent/PL3284140T3/en
Priority to EP16718204.7A priority patent/EP3284140B1/en
Priority to ES16718204T priority patent/ES2810674T3/en
Publication of WO2016165819A1 publication Critical patent/WO2016165819A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H01R4/643—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for rigid cylindrical bodies
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/50—Bases; Cases formed as an integral body
    • H01R13/501—Bases; Cases formed as an integral body comprising an integral hinge or a frangible part
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
    • H01R13/65914—Connection of shield to additional grounding conductors

Definitions

  • the present invention relates to a simplified device for the ground connection of elongated bodies such as coaxial cables and the like.
  • the field of the invention relates to elongated bodies such as coaxial cables and the like, used for the transmission of electromagnetic signals in the field of telecommunications.
  • the coaxial cables consist of a primary transmission conductor of the signal and a secondary shield conductor of the signal carried by the primary conductor, wherein the above-mentioned conductors are positioned reciprocally coaxial with respect to each other.
  • ground connection devices of the coaxial cables are used, positioned in contact with the secondary conductor and fixed to the outer sheath of the coaxial cable.
  • connection devices provided with an internal contact having a lever closing system are known.
  • This known solution has the disadvantage of requiring manpower interventions at the moment of installation, necessary for the forced closing of the internal contact on the cable.
  • This known structure also has the disadvantage of being complicated by the presence of the above-mentioned lever closing system, which can also be subject to breakage caused by the stress exerted for installing the ground connection device.
  • auxiliary elements which form the thicknesses between the outer shell and the internal contact of the ground connection device are also envisaged, which must be strongly tightened in order to guarantee a contact pressure which is sufficient for the functionality of the device.
  • the disadvantage lies in the complexity of the whole system, whose implementation requires considerable stress for tightening the outer shell on the cable. This stress, in fact, not only makes the installation of the system complicated and laborious, but also has the drawback of possibly causing breakage of the shell.
  • US 2013/098680 Al discloses a device for the ground connection of electric cables, wherein the internal electrical contact is crimped onto the cable.
  • US 2014/024253 Al illustrates a clamp support system for electric cables.
  • US 2002/153157 Al relates to a clamp with a bolt for the grounding of electric cables.
  • the main objective of the present invention is to provide a device for the ground connection of elongated bodies such as coaxial cables and the like which, unlike traditional devices of the same type, has a simpler structure and is easier and more reliable for installation and use, at the same time guaranteeing a sufficient contact pressure for reaching the desired electric conductivity between the internal contact of the ground connection device and the cable.
  • the device of the invention also offers the advantage of being easier to produce and with reduced costs with respect to analogous devices of the known art.
  • FIG. 1 illustrates the device of the invention in an open configuration
  • figure 2 illustrates the detail of the internal electrical contact of the device of figure 1;
  • figure 3 illustrates a perspective view of the internal electrical contact of figure 2 without the grounding cable
  • figure 4 illustrates an example of a coaxial cable provided with the device of the invention.
  • FIG. 5 illustrates the device of figure 4 in a transversal section.
  • the device of the invention is indicated as a whole with 1 in figure 1. It is composed of an internal electrical contact 2 on which the grounding cable 3 is fixed, and also an outer shell 4 composed of two half- shells 4a, 4b reciprocally joined in correspondence with a hinge 5.
  • the half-shell 4b is advantageously provided with teeth 6, suitable for being closed inside corresponding slots 7 situated on the half-shell 4a.
  • the internal contact 2 of the device of the invention consists of a single piece of sheet made of an electrically conductive and flexible material (for example brass) , folded so as to form two substantially "C"-shaped arms 8a, 8b, according to a reciprocally opposed arrangement.
  • an electrically conductive and flexible material for example brass
  • arms 8a, 8b have outward flaps 9a, 9b suitable for facilitating the insertion, between the same arms 8a, 8b, of the cable 20 to be ground connected.
  • said arms are initially pushed outwardly in the direction of the arrows Fl and F2 during the insertion of the cable 20, and are then elastically closed on the same cable with a countermovement, in order to tighten it with a pressure which is sufficient for ensuring the necessary electrical contact between the same cable 20 assembled in situ and the internal contact 2 of the device 1.
  • Corresponding walls 10a, 10b are envisaged on the opposite ends of the above-mentioned arms 8a, 8b, reciprocally joined, preferably by means of rivets 11. In this way, the correct elastic closing reaction of the arms 8a, 8b around the cable 20 is obtained, after the insertion in situ of the latter between the same.
  • the internal contact 2 of the device of the invention contains a section of tubular sheet 12 which forms the seat inside which the ground connection cable 3 is tightened, for example by crimping.
  • the shell 4 of the device of the invention is advantageously provided with an open sleeve 13, which forms the seat for the ground connection cable 3 on the same shell 4.
  • the latter is also provided with abutments 14,15 which serve to hold the cable 3 fixed to the internal contact 2, in position, preventing disengagement in an axial direction.
  • the engagement of the cable 3 inside the sleeve 13 is effected so as to allow the relative rotations (arrows F3,F4 of figure 1), which are also transmitted to the internal contact 2 which can thus be most suitably oriented for installation.
  • Seats 16 are also envisaged on the internal surface of the half-shells 4a, 4b of the device 1, for housing an adhesive sealant 17 which closes the portions of shell 4 surrounding the cables 3 and 20, and also in correspondence with the portion of half-shells 4a, 4b that are clamped at the height of the teeth 6.
  • Said adhesive sealant 17 preferably consists of an elastomeric rubber such as butyl, suitable for keeping the half-shells 4a, 4b reciprocally closed on each other, even without the help of the action of the above-mentioned teeth 6.
  • the outer shell 4 can also be applied on the latter without having to generate further tightening stress, but simply with the stress necessary for ensuring the adhesion of the sealant 17 on the cables 3,20 and on the section of shell 4 in correspondence with the teeth 6 and slots 7.

Abstract

A device (1) for the ground connection of elongated bodies (20), such as coaxial cables or the like, of the type comprising an outer shell (4) and an internal electrical contact (2) electrically connected to a ground connection cable (3), wherein the above- mentioned internal electrical contact (2) is provided with elastic arms (8a, 8b) suitable for exerting, on the above-mentioned body (20), the contact pressure necessary for reaching the desired degree of electrical conductivity between the same elongated body (20) and said internal electrical contact (2). With respect to analogous devices of the known art, that according to the present invention offers the advantage of ensuring the desired contact pressure level between the cable and the internal electrical contact of the ground connection device, even with the use of a simple structure that is reliable and can be rapidly installed.

Description

SIMPLIFIED DEVICE FOR THE GROUND CONNECTION OF COAXIAL CABLES
DESCRIPTION
The present invention relates to a simplified device for the ground connection of elongated bodies such as coaxial cables and the like.
The field of the invention relates to elongated bodies such as coaxial cables and the like, used for the transmission of electromagnetic signals in the field of telecommunications.
For this purpose, the coaxial cables consist of a primary transmission conductor of the signal and a secondary shield conductor of the signal carried by the primary conductor, wherein the above-mentioned conductors are positioned reciprocally coaxial with respect to each other.
In installations of this type, it is also usual to effect the grounding of the coaxial cables in order to dissipate any possible parasite currents and also any possible electrical discharges such as lightning. For this purpose, ground connection devices of the coaxial cables are used, positioned in contact with the secondary conductor and fixed to the outer sheath of the coaxial cable.
Traditionally, in order to reach the desired contact pressure between the ground connection device and the cable, connection devices provided with an internal contact having a lever closing system, are known. This known solution, however, has the disadvantage of requiring manpower interventions at the moment of installation, necessary for the forced closing of the internal contact on the cable. This known structure also has the disadvantage of being complicated by the presence of the above-mentioned lever closing system, which can also be subject to breakage caused by the stress exerted for installing the ground connection device.
Again, in order to reach the desired compression degree between the internal contact of the ground connection device and the cable, auxiliary elements which form the thicknesses between the outer shell and the internal contact of the ground connection device are also envisaged, which must be strongly tightened in order to guarantee a contact pressure which is sufficient for the functionality of the device. Also in this case, the disadvantage lies in the complexity of the whole system, whose implementation requires considerable stress for tightening the outer shell on the cable. This stress, in fact, not only makes the installation of the system complicated and laborious, but also has the drawback of possibly causing breakage of the shell.
US 2013/098680 Al discloses a device for the ground connection of electric cables, wherein the internal electrical contact is crimped onto the cable. US 2014/024253 Al illustrates a clamp support system for electric cables. US 2002/153157 Al relates to a clamp with a bolt for the grounding of electric cables.
The main objective of the present invention is to provide a device for the ground connection of elongated bodies such as coaxial cables and the like which, unlike traditional devices of the same type, has a simpler structure and is easier and more reliable for installation and use, at the same time guaranteeing a sufficient contact pressure for reaching the desired electric conductivity between the internal contact of the ground connection device and the cable.
These and other objectives are achieved with the device and elongated body of claims 1 and 9 respectively. Preferred embodiments of the invention are specified in the remaining claims.
With respect to analogous devices of the known art, that according to the present invention offers the advantage of ensuring the desired contact pressure level between the cable and the internal electrical contact of the ground connection device, even with the use of a simple structure that is reliable and can be rapidly installed.
Thanks to its simplified structure, the device of the invention also offers the advantage of being easier to produce and with reduced costs with respect to analogous devices of the known art.
These and other objectives, advantages and characteristics appear evident from the following description of a preferred embodiment of the device of the invention, illustrated, for exemplificative and non-limiting purposes, in the figures of the enclosed drawings .
In these:
- figure 1 illustrates the device of the invention in an open configuration;
figure 2 illustrates the detail of the internal electrical contact of the device of figure 1;
figure 3 illustrates a perspective view of the internal electrical contact of figure 2 without the grounding cable;
figure 4 illustrates an example of a coaxial cable provided with the device of the invention; and
- figure 5 illustrates the device of figure 4 in a transversal section. The device of the invention is indicated as a whole with 1 in figure 1. It is composed of an internal electrical contact 2 on which the grounding cable 3 is fixed, and also an outer shell 4 composed of two half- shells 4a, 4b reciprocally joined in correspondence with a hinge 5. The half-shell 4b is advantageously provided with teeth 6, suitable for being closed inside corresponding slots 7 situated on the half-shell 4a.
As is better described in figures 2 and 3, the internal contact 2 of the device of the invention consists of a single piece of sheet made of an electrically conductive and flexible material (for example brass) , folded so as to form two substantially "C"-shaped arms 8a, 8b, according to a reciprocally opposed arrangement.
The free ends of these arms 8a, 8b have outward flaps 9a, 9b suitable for facilitating the insertion, between the same arms 8a, 8b, of the cable 20 to be ground connected. For this purpose, said arms are initially pushed outwardly in the direction of the arrows Fl and F2 during the insertion of the cable 20, and are then elastically closed on the same cable with a countermovement, in order to tighten it with a pressure which is sufficient for ensuring the necessary electrical contact between the same cable 20 assembled in situ and the internal contact 2 of the device 1.
Corresponding walls 10a, 10b are envisaged on the opposite ends of the above-mentioned arms 8a, 8b, reciprocally joined, preferably by means of rivets 11. In this way, the correct elastic closing reaction of the arms 8a, 8b around the cable 20 is obtained, after the insertion in situ of the latter between the same.
In correspondence with the side of said walls 10a, 10b opposite that joined to the arms 8a and 8b, the internal contact 2 of the device of the invention contains a section of tubular sheet 12 which forms the seat inside which the ground connection cable 3 is tightened, for example by crimping.
The shell 4 of the device of the invention is advantageously provided with an open sleeve 13, which forms the seat for the ground connection cable 3 on the same shell 4. The latter is also provided with abutments 14,15 which serve to hold the cable 3 fixed to the internal contact 2, in position, preventing disengagement in an axial direction.
In order to simplify the installation of the device 1 on the cable 20 to be ground connected, the engagement of the cable 3 inside the sleeve 13 is effected so as to allow the relative rotations (arrows F3,F4 of figure 1), which are also transmitted to the internal contact 2 which can thus be most suitably oriented for installation.
Seats 16 are also envisaged on the internal surface of the half-shells 4a, 4b of the device 1, for housing an adhesive sealant 17 which closes the portions of shell 4 surrounding the cables 3 and 20, and also in correspondence with the portion of half-shells 4a, 4b that are clamped at the height of the teeth 6.
Said adhesive sealant 17 preferably consists of an elastomeric rubber such as butyl, suitable for keeping the half-shells 4a, 4b reciprocally closed on each other, even without the help of the action of the above-mentioned teeth 6.
According to the invention, as the desired compression level of the internal contact 2 on the cable 20 to be ground connected is obtained thanks to the closing and elastic tightening action of the arms 8a, 8b around the same cable 20, the outer shell 4 can also be applied on the latter without having to generate further tightening stress, but simply with the stress necessary for ensuring the adhesion of the sealant 17 on the cables 3,20 and on the section of shell 4 in correspondence with the teeth 6 and slots 7.

Claims

1. A device for the ground connection of elongated bodies (20), such as coaxial cables or the like, of the type comprising an outer shell (4) and an internal electrical contact (2) electrically connected to a ground connection cable (3), characterized in that the above-mentioned internal electrical contact (2) is provided with substantially "C"-shaped elastic arms (8a, 8b) according to a reciprocally opposed arrangement and suitable for exerting, by the elastic closing on the above-mentioned body (20), the contact pressure necessary for reaching the desired degree of electrical conductivity between the same elongated body (20) and said internal electrical contact (2) .
2. The device according to claim 1, characterized in that said internal electrical contact (2) is produced in a single piece of flexible sheet, shaped so as to form said arms (8a, 8b) reciprocally joined in correspondence with walls (10a, 10b) in turn fixed to each other.
3. The device according to claim 2, characterized in that it comprises a tubular section (12) for housing said ground connection cable (3) , envisaged on the side of said walls (10a, 10b) opposite to that of said arms (8a, 8b) .
4. The device according to claim 3, characterized in that the free ends of said arms (8a, 8b) have outer flaps (9a, 9b) suitable for facilitating the insertion of the above-mentioned cable (20) between the same arms (8a, 8b).
5. The device according to claim 1, characterized in that said outer shell (4) is composed of two half- shells (4a, b) reciprocally joined in correspondence with a hinge (5) .
6. The device according to claim 5, characterized in that said shell (4) has an open sleeve (13) and abutments (14,15) for housing and withholding, with the possibility of rotation, said cable (3) and said internal electrical contact (2) with respect to the same shell ( ) .
7. The device according to claim 5, characterized in that said shell (4) is provided with seats (16) for housing an adhesive sealant (17).
8. The device according to any of the previous claims, characterized in that it comprises teeth (6) and corresponding slots (7) for the reciprocal closing of said half-shells (4a, 4b), rivets (11) also being envisaged for the reciprocal fixing of said walls (10a, 10b) of the internal electrical contact (2).
9. An elongated body of the type comprising an electrical conductor part, characterized in that it equipped with the device according to one or more the previous claims.
10. The elongated body according to claim characterized in that it is a coaxial cable (20).
PCT/EP2016/000593 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables WO2016165819A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL16718204T PL3284140T3 (en) 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables
EP16718204.7A EP3284140B1 (en) 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables
ES16718204T ES2810674T3 (en) 2015-04-17 2016-04-11 Simplified device for grounding coaxial cables

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2015A000560A ITMI20150560A1 (en) 2015-04-17 2015-04-17 SIMPLIFIED DEVICE FOR GROUND CONNECTION OF LONG-SHAPED BODIES
ITMI2015A000560 2015-04-17

Publications (1)

Publication Number Publication Date
WO2016165819A1 true WO2016165819A1 (en) 2016-10-20

Family

ID=53673181

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/000593 WO2016165819A1 (en) 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables

Country Status (5)

Country Link
EP (1) EP3284140B1 (en)
ES (1) ES2810674T3 (en)
IT (1) ITMI20150560A1 (en)
PL (1) PL3284140T3 (en)
WO (1) WO2016165819A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63195978A (en) * 1987-02-10 1988-08-15 株式会社東芝 Insulated terminal for grounding coaxial cable
US20020153157A1 (en) 2001-04-18 2002-10-24 Harger Timothy R. Cable grounding clamp
EP1808935A1 (en) * 2005-12-19 2007-07-18 Alcatel Lucent Grounding device with plastic housing
US20130098680A1 (en) 2010-07-14 2013-04-25 Yazaki Corporation Earth cable connecting structure of shielded electric wire
US20140024253A1 (en) 2012-07-23 2014-01-23 John Mezzalingua Associates, LLC Minimally invasive mid-span grounding clamp and method of use thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63195978A (en) * 1987-02-10 1988-08-15 株式会社東芝 Insulated terminal for grounding coaxial cable
US20020153157A1 (en) 2001-04-18 2002-10-24 Harger Timothy R. Cable grounding clamp
EP1808935A1 (en) * 2005-12-19 2007-07-18 Alcatel Lucent Grounding device with plastic housing
US20130098680A1 (en) 2010-07-14 2013-04-25 Yazaki Corporation Earth cable connecting structure of shielded electric wire
US20140024253A1 (en) 2012-07-23 2014-01-23 John Mezzalingua Associates, LLC Minimally invasive mid-span grounding clamp and method of use thereof

Also Published As

Publication number Publication date
ES2810674T3 (en) 2021-03-09
EP3284140B1 (en) 2020-06-03
PL3284140T3 (en) 2020-11-02
ITMI20150560A1 (en) 2016-10-17
EP3284140A1 (en) 2018-02-21

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