EP3284140B1 - 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
EP3284140B1
EP3284140B1 EP16718204.7A EP16718204A EP3284140B1 EP 3284140 B1 EP3284140 B1 EP 3284140B1 EP 16718204 A EP16718204 A EP 16718204A EP 3284140 B1 EP3284140 B1 EP 3284140B1
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EP
European Patent Office
Prior art keywords
cable
electrical contact
internal electrical
ground connection
arms
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
EP16718204.7A
Other languages
German (de)
French (fr)
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EP3284140A1 (en
Inventor
Alberto VARALE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fi Mo Tec SpA
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Fi Mo Tec SpA
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Publication date
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Priority to PL16718204T priority Critical patent/PL3284140T3/en
Publication of EP3284140A1 publication Critical patent/EP3284140A1/en
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    • 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 A1 discloses a device for the ground connection of electric cables, wherein the internal electrical contact is crimped onto the cable.
  • US 2014/024253 A1 illustrates a clamp support system for electric cables.
  • US 2002/153157 A1 relates to a clamp with a bolt for the grounding of electric cables.
  • EP 1 808 935 A1 discloses a grounding device with plastic housing in which a contact element is made of a sheet of metal.
  • JP S63 195978 A concerns a grounding insulation device for 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.
  • 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 F1 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.

Landscapes

  • Cable Accessories (AREA)
  • Multi-Conductor Connections (AREA)

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 A1 discloses a device for the ground connection of electric cables, wherein the internal electrical contact is crimped onto the cable. US 2014/024253 A1 illustrates a clamp support system for electric cables. US 2002/153157 A1 relates to a clamp with a bolt for the grounding of electric cables.
  • EP 1 808 935 A1 discloses a grounding device with plastic housing in which a contact element is made of a sheet of metal.
  • JP S63 195978 A concerns a grounding insulation device for 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 6 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 F1 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 (6)

  1. A device for the ground connection of elongated bodies (20), the elongated bodies being coaxial cables or the like, the device comprising an outer shell (4) and an internal electrical contact (2) electrically connected to a cable (3) for ground connection, wherein the above-mentioned internal electrical contact (2) is equipped with substantially "C" shaped elastic arm (8a) configured to be elastically closed onto the mentioned elongated body (20) so that the contact pressure realizes the desired electrical conductivity between the elongated body (20) and said internal electrical contact (2) connected to said cable (3) for mass connection, said outer shell (4) comprising two half-shells (4a, 4b) reciprocally joined at a hinge (5) characterized in that
    the device further comprises a second substantially "C" shaped elastic arm (8b) provided on the internal electrical contact (2) disposed opposed the first elastic arm (8a), and
    the outer shell (4) is further provided with seats (16) for housing an adhesive sealant (17), teeth (6) and corresponding slots (7) for the reciprocal closing of said half-shells (4a, 4b) one to the other and rivets (11) provided for the reciprocal fixing of said walls (10a, 10b) of the internal electrical contact (2).
  2. The device according to claim 1, characterized in that said internal electrical contact (2) is realized by a single piece of flexible sheet, shaped so as to form said arms (8a, 8b) reciprocally joined at 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 cable for mass connection (3), provided on the side of said walls (10a, 10b) opposite to that joint to 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) configured for facilitating the insertion of the above-mentioned cable (20) between the same arms (8a, 8b).
  5. The device according to claim 4, 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 said shell (4).
  6. An assembly comprising a coaxial cable (20) and a device for the ground connection according to any of the preceding claims.
EP16718204.7A 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables Active EP3284140B1 (en)

Priority Applications (1)

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

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
PCT/EP2016/000593 WO2016165819A1 (en) 2015-04-17 2016-04-11 Simplified device for the ground connection of coaxial cables

Publications (2)

Publication Number Publication Date
EP3284140A1 EP3284140A1 (en) 2018-02-21
EP3284140B1 true EP3284140B1 (en) 2020-06-03

Family

ID=53673181

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16718204.7A Active EP3284140B1 (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)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112039014A (en) * 2019-06-04 2020-12-04 罗森伯格（上海）通信技术有限公司 Grounding protection device

Family Cites Families (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
US6486402B2 (en) 2001-04-18 2002-11-26 Harger, Inc. Cable grounding clamp
ATE377266T1 (en) * 2005-12-19 2007-11-15 Alcatel Lucent EARTHING SYSTEM WITH A PLASTIC HOUSING
JP5688242B2 (en) 2010-07-14 2015-03-25 矢崎総業株式会社 Shield wire ground wire connection structure
US9362635B2 (en) 2012-07-23 2016-06-07 John Mezzalingua Associates, LLC Minimally invasive mid-span grounding clamp and method of use thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3284140A1 (en) 2018-02-21
PL3284140T3 (en) 2020-11-02
ITMI20150560A1 (en) 2016-10-17
WO2016165819A1 (en) 2016-10-20
ES2810674T3 (en) 2021-03-09

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