WO2011012770A1 - Connector or jointing clamp for coated overhead cables - Google Patents

Connector or jointing clamp for coated overhead cables Download PDF

Info

Publication number
WO2011012770A1
WO2011012770A1 PCT/FI2010/050599 FI2010050599W WO2011012770A1 WO 2011012770 A1 WO2011012770 A1 WO 2011012770A1 FI 2010050599 W FI2010050599 W FI 2010050599W WO 2011012770 A1 WO2011012770 A1 WO 2011012770A1
Authority
WO
WIPO (PCT)
Prior art keywords
connector
body sections
jointing clamp
body section
elastomer
Prior art date
Application number
PCT/FI2010/050599
Other languages
French (fr)
Inventor
Piotr Maciej Depka
Krzysztof Adam Gajewski
Mika Olavi Heijari
Antti Tapio Toivanen
Original Assignee
Ensto Finland Oy
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 Ensto Finland Oy filed Critical Ensto Finland Oy
Priority to RU2012106812/07A priority Critical patent/RU2544987C2/en
Priority to EP10803958.7A priority patent/EP2460232A4/en
Publication of WO2011012770A1 publication Critical patent/WO2011012770A1/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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
    • H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
    • 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
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • 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
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/38—Clamped connections, spring connections utilising a clamping member acted on by screw or nut
    • H01R4/44—Clamping areas on both sides of screw

Definitions

  • the invention relates to a connector or jointing clamp for coated overhead cables, comprising two body sections, an upper body section and a lower body section, contact teeth in each of the body sections, a clamping screw for moving the body sections and the contact teeth thereof towards each other, and a moment transmission nut, provided with a fraction point and in engagement by its internal thread with an external thread of the clamping screw above the upper body section.
  • Such a connector or jointing clamp is known from the Applicant's patent publication FI-102120.
  • a problem with this and other similar clamps arises from trouble in terms of installation.
  • the outer surface of a clamp is slippery, especially in rain and winter, a secure grip of the clamp being difficult to obtain in view of placing the wires properly in the clamp.
  • An object of the invention is to provide a connector or jointing clamp of the foregoing type, wherein the above-mentioned handling-related problem has been alleviated.
  • FIG. 1 shows a connector or jointing clamp of the invention in a vertical section along a direction perpendicular to wires being joined;
  • Fig. 2 shows the same connector or jointing clamp in a vertical section along the direction of wires being joined
  • Fig. 3 shows the same connector or jointing clamp in a view from the end side along the direction of wires being joined.
  • the proposed connector or jointing clamp comprises two body sections, namely an upper body section 1 and a lower body section 2.
  • Each of the body sections is provided with contact teeth 3, bearing against a material of the body sections, which consists of hard plastics.
  • the contact teeth pierce the coating or insulation of the cable.
  • the contact teeth 3 are enclosed by soft plastics, especially elastomer 8, by which the contact teeth are attached to the body sections in a watertight manner.
  • These soft plastic components 8, preferably of elastomer extend onto the exterior sides of the body sections, thus increasing grip friction for easier handling.
  • These soft plastic components 8 are designed even to start with, i.e.
  • the elastomer 8 is of a color substantially different from that of the body sections 1 and 2 and also substantially different from black, for example blue or light grey. The color selections can also be used for various purposes of encoding connector or jointing clamp types.
  • the elastomer 8 is provided with an adequate UV shield. The gripping assistance provided by elastomer and its non-compliant coloring make for easier installation.
  • the connector or jointing clamp includes a clamping screw 4 for moving the body sections 1, 2 and the contact teeth 3 thereof towards each other.
  • a moment transmission nut 5, provided with a fraction point 6, is by its internal thread in engagement with an external thread of the clamping screw 4 above the upper body section 4.
  • the nut 5 breaks up at the fraction point 6.
  • the remaining bottom part of the nut 5 can be screwed off, if necessary, for releasing the connector or jointing clamp after first removing a protective collar 13 from around the bottom part of the nut 5.
  • Between the nut 5 and the body section 1 can be provided an appropriate bracket, which allows for a tilting action of the upper body section 1 with respect to the clamping screw 4.
  • the lower body section 2 is provided with an internally threaded column 7, which is fixedly cast therein and in engagement with the external thread of the clamping screw 4.
  • the extent of engagement extends over a substantial distance above the lower body section's 2 contact teeth 3.
  • the extent of engagement, increased by means of this column 7, is greater than the diameter of the clamping screw 4, preferably greater than the diameter of a cable to be joined by means of the connector or jointing clamp, whereby the column 7 extends at least to flushness with the upper body section's 1 contact teeth 3 as the cables have been joined by means of the connector or jointing clamp.
  • a top end of the column 7 extends into a guide of the upper body section 1 for a more stable structure.
  • the clamping load is distributed in the lower body section 2 over a long helical distance, which enables the stress applied to the body to be distributed over a larger area across the entire body, nor will it be necessary to use excessive dimensions for the lower body 2 below the contact teeth 3.
  • a head 11 of the clamping screw 4 can be totally omitted for cost saving, and/or a headless clamping screw can be fabricated from a higher quality and more expensive material, such as stainless steel.
  • a gripping formation 12 for an open- ended spanner the helical engagement can be further lengthened.
  • the threaded hole may terminate inside the gripping formation 12 to provide it with a solid bottom side.
  • the upper body section's 1 elastomer 8 is designed with downward directed guides 9, which extend to a guiding contact with guides 10 directed upward from the lower body section's 2 elastomer 8.
  • These guides 9 and 10 constrain elastically the relative tilting action of the body sections 1 and 2, such that, when placing a cable between one pair of contact teeth 3, the other pair of contact teeth 3 does not close its gap, thus facilitating the insertion of a second wire.

Landscapes

  • Clamps And Clips (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

(57) Abstract The present invention relates to a connector or jointing clamp for coated overhead cables, comprising two body sections, an upper body section (1) and a lower body section (2), contact teeth (3) in each of the body sections, a clamping screw (4) for moving the body sections and the contact teeth thereof towards each other, and a moment transmission nut (5), provided with a fraction point (6). It is in en- gagement by its internal thread with an external thread of the clamping screw (4) above the upper body section (1). The contact teeth (3) are attached to the body sections (1, 2) and coated with a plastic material, preferably elastomer (8), softer than the body sections, which extends onto the external sides of the body sections (1, 2) for added grip friction.

Description

Connector or jointing clamp for coated overhead cables
The invention relates to a connector or jointing clamp for coated overhead cables, comprising two body sections, an upper body section and a lower body section, contact teeth in each of the body sections, a clamping screw for moving the body sections and the contact teeth thereof towards each other, and a moment transmission nut, provided with a fraction point and in engagement by its internal thread with an external thread of the clamping screw above the upper body section.
Such a connector or jointing clamp is known from the Applicant's patent publication FI-102120. A problem with this and other similar clamps arises from trouble in terms of installation. The outer surface of a clamp is slippery, especially in rain and winter, a secure grip of the clamp being difficult to obtain in view of placing the wires properly in the clamp.
An object of the invention is to provide a connector or jointing clamp of the foregoing type, wherein the above-mentioned handling-related problem has been alleviated.
This object is achieved in the invention on the basis of characterizing features presented in the appended claim 1. When the watertight attachment elastomer for contact teeth extends onto the external sides of the body sections, grip friction is increased and a better hold is obtained of the clamp. Separate elements need not be made for increasing grip friction as the attachment elastomer for contact teeth works in two functions
Preferred embodiments of the invention are presented in the dependent claims.
The invention will now be described more closely with reference to the accompanying drawings, in which Fig. 1 shows a connector or jointing clamp of the invention in a vertical section along a direction perpendicular to wires being joined;
Fig. 2 shows the same connector or jointing clamp in a vertical section along the direction of wires being joined, and
Fig. 3 shows the same connector or jointing clamp in a view from the end side along the direction of wires being joined. The proposed connector or jointing clamp comprises two body sections, namely an upper body section 1 and a lower body section 2. Each of the body sections is provided with contact teeth 3, bearing against a material of the body sections, which consists of hard plastics. The contact teeth pierce the coating or insulation of the cable. The contact teeth 3 are enclosed by soft plastics, especially elastomer 8, by which the contact teeth are attached to the body sections in a watertight manner. These soft plastic components 8, preferably of elastomer, extend onto the exterior sides of the body sections, thus increasing grip friction for easier handling. These soft plastic components 8 are designed even to start with, i.e. prior to the attachment of a connector or jointing clamp to a wire, to extend over onto the external side surfaces of the body sections 1, 2 for added grip friction. The elastomer 8 is of a color substantially different from that of the body sections 1 and 2 and also substantially different from black, for example blue or light grey. The color selections can also be used for various purposes of encoding connector or jointing clamp types. The elastomer 8 is provided with an adequate UV shield. The gripping assistance provided by elastomer and its non-compliant coloring make for easier installation.
The connector or jointing clamp includes a clamping screw 4 for moving the body sections 1, 2 and the contact teeth 3 thereof towards each other. A moment transmission nut 5, provided with a fraction point 6, is by its internal thread in engagement with an external thread of the clamping screw 4 above the upper body section 4. Upon reaching a clamping force sufficient for joining the wires, the nut 5 breaks up at the fraction point 6. The remaining bottom part of the nut 5 can be screwed off, if necessary, for releasing the connector or jointing clamp after first removing a protective collar 13 from around the bottom part of the nut 5. Between the nut 5 and the body section 1 can be provided an appropriate bracket, which allows for a tilting action of the upper body section 1 with respect to the clamping screw 4.
The lower body section 2 is provided with an internally threaded column 7, which is fixedly cast therein and in engagement with the external thread of the clamping screw 4. The extent of engagement extends over a substantial distance above the lower body section's 2 contact teeth 3. The extent of engagement, increased by means of this column 7, is greater than the diameter of the clamping screw 4, preferably greater than the diameter of a cable to be joined by means of the connector or jointing clamp, whereby the column 7 extends at least to flushness with the upper body section's 1 contact teeth 3 as the cables have been joined by means of the connector or jointing clamp. Preferably, in use, a top end of the column 7 extends into a guide of the upper body section 1 for a more stable structure. By virtue of the column 7, the clamping load is distributed in the lower body section 2 over a long helical distance, which enables the stress applied to the body to be distributed over a larger area across the entire body, nor will it be necessary to use excessive dimensions for the lower body 2 below the contact teeth 3. As a result of this, if desired, a head 11 of the clamping screw 4 can be totally omitted for cost saving, and/or a headless clamping screw can be fabricated from a higher quality and more expensive material, such as stainless steel. When providing below the lower body 2 a gripping formation 12 for an open- ended spanner, the helical engagement can be further lengthened. The threaded hole may terminate inside the gripping formation 12 to provide it with a solid bottom side. The upper body section's 1 elastomer 8 is designed with downward directed guides 9, which extend to a guiding contact with guides 10 directed upward from the lower body section's 2 elastomer 8. These guides 9 and 10 constrain elastically the relative tilting action of the body sections 1 and 2, such that, when placing a cable between one pair of contact teeth 3, the other pair of contact teeth 3 does not close its gap, thus facilitating the insertion of a second wire.

Claims

Claims
1. A connector or jointing clamp for coated overhead cables, comprising two body sections, an upper body section (1) and a lower body section (2), con- tact teeth (3) in each of the body sections, a clamping screw (4) for moving the body sections and the contact teeth thereof towards each other, and a moment transmission nut (5), provided with a fraction point (6) and in engagement by its internal thread with an external thread of the clamping screw (4) above the upper body section (1), characterized in that the con- tact teeth (3) are attached to the body sections (1, 2) and coated with a plastic material, preferably elastomer (8), softer than the body sections, that the soft plastic material (8) is even to start with, i.e. prior to the attachment of a connector or jointing clamp, designed to extend onto the external side surfaces of the body sections (1, 2) for added grip friction.
2. A connector or jointing clamp according to claim 1, characterized in that the elastomer (8) is of a color substantially different from that of the body sections and also different from black.
3. A connector or jointing clamp according to claim 2, characterized in that the elastomer (8) is blue or light grey.
4. A connector or jointing clamp according to any of claims 1-3, characterized in that extending downward from the upper body section's (1) elas- tomer (8) are guides (9), which are in a guiding contact with guides (10) directed upward from the lower body section's (2) elastomer (8).
PCT/FI2010/050599 2009-07-27 2010-07-15 Connector or jointing clamp for coated overhead cables WO2011012770A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
RU2012106812/07A RU2544987C2 (en) 2009-07-27 2010-07-15 Connector or connecting clamp for aerial cables with coating
EP10803958.7A EP2460232A4 (en) 2009-07-27 2010-07-15 Connector or jointing clamp for coated overhead cables

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095810A FI121692B (en) 2009-07-27 2009-07-27 Connection piece for coated overhead lines
FI20095810 2009-07-27

Publications (1)

Publication Number Publication Date
WO2011012770A1 true WO2011012770A1 (en) 2011-02-03

Family

ID=40935887

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2010/050599 WO2011012770A1 (en) 2009-07-27 2010-07-15 Connector or jointing clamp for coated overhead cables

Country Status (4)

Country Link
EP (1) EP2460232A4 (en)
FI (1) FI121692B (en)
RU (1) RU2544987C2 (en)
WO (1) WO2011012770A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102354823A (en) * 2011-07-25 2012-02-15 郭金泉 Inserting connection stress wire clamp of power conducting wires
ITBO20120180A1 (en) * 2012-04-04 2013-10-05 3I En S R L JUNCTION JOINT FOR UNDERGROUND CABLES
CN103606761A (en) * 2013-11-19 2014-02-26 郭金泉 Non-stress-connection wrapping connection type wire clamp of electric wires

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715529A1 (en) * 1987-04-02 1988-10-20 Pfisterer Elektrotech Karl Fully insulated tap-in connector for medium voltage - has displacement contacts within housing embedded in deformable insulation to provide increased creepage distance
FR2790873A1 (en) * 1999-03-08 2000-09-15 Michaud Sa High voltage electrical cable connector includes insulating shells with insulation penetrating jaws clamped around two parallel cables

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2601516B2 (en) * 1984-06-15 1988-08-05 Sicame Sa INSULATED BYPASS CONNECTOR FOR ELECTRICAL CABLES
AT390854B (en) * 1985-08-05 1990-07-10 Mosdorfer Gmbh Fully insulated junction terminal for insulated overhead conductors
FR2596209B1 (en) * 1986-03-20 1989-06-16 Verlant Beaurain MONOBLOCK BYPASS CONNECTOR, ESPECIALLY FOR LIVE POWER LINES
FR2630591B1 (en) * 1988-04-21 1992-02-07 Materiel Electr Soc Ind INSULATING PERFORATION TYPE SINGLE POLE CONNECTOR
FI80169C (en) * 1989-03-17 1990-04-10 Sekko Ab Oy Arc protection that works through the conductor insulation
FI102120B (en) * 1997-03-07 1998-10-15 Sekko Ab Oy The coupling piece for coated air line and torque screw used therein
US6394851B1 (en) * 2001-06-28 2002-05-28 Andrew Corporation Cigarette lighter adapter with one-piece solderless ground contact
US7530840B2 (en) * 2005-02-10 2009-05-12 Zoll Medical Corporation Medical system including a cable retainer
WO2008119116A1 (en) * 2007-03-30 2008-10-09 Kenneth Tak-Ming Leong A cap for usb flash memory drives and type-a connector plugs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3715529A1 (en) * 1987-04-02 1988-10-20 Pfisterer Elektrotech Karl Fully insulated tap-in connector for medium voltage - has displacement contacts within housing embedded in deformable insulation to provide increased creepage distance
FR2790873A1 (en) * 1999-03-08 2000-09-15 Michaud Sa High voltage electrical cable connector includes insulating shells with insulation penetrating jaws clamped around two parallel cables

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2460232A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102354823A (en) * 2011-07-25 2012-02-15 郭金泉 Inserting connection stress wire clamp of power conducting wires
ITBO20120180A1 (en) * 2012-04-04 2013-10-05 3I En S R L JUNCTION JOINT FOR UNDERGROUND CABLES
CN103606761A (en) * 2013-11-19 2014-02-26 郭金泉 Non-stress-connection wrapping connection type wire clamp of electric wires

Also Published As

Publication number Publication date
EP2460232A1 (en) 2012-06-06
FI121692B (en) 2011-02-28
FI20095810A (en) 2011-01-28
FI20095810A0 (en) 2009-07-27
RU2012106812A (en) 2013-10-20
EP2460232A4 (en) 2013-05-22
RU2544987C2 (en) 2015-03-20

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