WO2009125167A1 - Cable retention bracket - Google Patents

Cable retention bracket Download PDF

Info

Publication number
WO2009125167A1
WO2009125167A1 PCT/GB2009/000880 GB2009000880W WO2009125167A1 WO 2009125167 A1 WO2009125167 A1 WO 2009125167A1 GB 2009000880 W GB2009000880 W GB 2009000880W WO 2009125167 A1 WO2009125167 A1 WO 2009125167A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
retention bracket
guide
attachment means
spacer element
Prior art date
Application number
PCT/GB2009/000880
Other languages
French (fr)
Inventor
Peter Elliott Moore
Jamie Dobbins
Original Assignee
Calder Limited
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 Calder Limited filed Critical Calder Limited
Publication of WO2009125167A1 publication Critical patent/WO2009125167A1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/30—Installations of cables or lines on walls, floors or ceilings
    • H02G3/32—Installations of cables or lines on walls, floors or ceilings using mounting clamps
    • 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
    • H01R13/58—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable
    • H01R13/5804—Means for relieving strain on wire connection, e.g. cord grip, for avoiding loosening of connections between wires and terminals within a coupling device terminating a cable comprising a separate cable clamping part
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G15/00—Cable fittings
    • H02G15/007—Devices for relieving mechanical stress
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/05—Suspension arrangements or devices for electric cables or lines
    • H02G7/053—Suspension clamps and clips for electric overhead lines not suspended to a supporting wire

Definitions

  • the present invention relates to an improved cable retention bracket.
  • the installation of cabling into some items of equipment requires the use of a cable gland assembly, such as a HawkeTM universal gland or similar, to prevent the cable chaffing on the edge of the equipment and to provide a means of retention.
  • the cable is threaded though the gland assembly and the wires at the end of the cable are attached to the appropriate connectors contained within the electrical housing, the gland assembly being attached to the housing by means of, for example, a threaded mechanism.
  • the gland within the assembly prevents the ingress of water and other contaminants into the interior to the equipment and, in some cases, provides an explosion proof barrier.
  • it is necessary for the cable to be physically supported remote from the connection such that strain cannot be applied to the gland should a force be applied to the cable.
  • this retention is provided by the installation of a remote bracket or hook to which the cable is secured.
  • the adequate installation of remote brackets and hooks is a time-consuming and costly process.
  • An object of the present invention is to provide an improved cable retention bracket that aims to overcome, or at least alleviate, the abovementioned drawbacks.
  • a first aspect of the present invention provides a cable retention bracket comprising a cable guide and attachment means separated by a spacer element.
  • the cable guide is preferably in the form of an adjustable clamp for receiving the cable.
  • the clamp comprises two substantially symmetrical parts for defining a passage therebetween for receiving the cable, in particular each being semicircular in profile, that are held together by suitable fastening means, such as a threaded screw, nut and washer.
  • the cable guide may be substantially circular with a gap extending radially therethrough which may enable loosening and tightening of the clamp around the cable.
  • an elastomeric sleeve such as an 0-ring or, more preferably, a laminated or non-laminated foam ring, within the interior of the guide.
  • the attachment means is in the form of a flange that is spaced apart from the cable guide but extends substantially parallel thereto, being separated therefrom by the spacer element.
  • the flange is provided with a bore therethrough, the bore being dimensioned to receive a part of a cable gland assembly, such as a threaded portion thereof.
  • the bracket may be secured to an electrical apparatus by the fastening of the gland to the apparatus in the conventional way.
  • an ingress protection washer may be provided within the bore of the flange where conditions require such additional protection.
  • the spacer element may be any suitable member that maintains an appropriate distance between the attachment means and the cable guide.
  • the spacer element comprises at least one arm extending from the cable guide to the attachment means.
  • the spacer element comprises a pair of arms that converge towards the cable guide. More preferably still, the arms extend parallel from each side of the attachment means, such as the flange, substantially perpendicularly thereto and then converge- to meet at an apex at the base of the cable guide.
  • the spacer element may be formed such as to provide a cable guide in the same plane as the bore of the attachment means or the spacer element may be constructed such as to provide a change of plane, thereby accommodating different types of cable gland assemblies.
  • the cable guide, spacer element and attachment means are formed integrally from a single piece of material, for example being injection moulded or machined from a piece of flat metal.
  • the thickness and type of material used for the bracket, in particular, the spacer element, will depend upon the weight of the cable to be supported by the bracket.
  • the cable retention bracket of the invention is preferably provided as a separate entity for attachment to an existing cable gland assembly.
  • the bracket also may be formed as part of the cable gland assembly.
  • a second aspect of the present invention provides a cable gland assembly that includes a cable retention bracket according to the first aspect of the present invention.
  • the cable gland assembly may include standard components in the art, for example, one or more of the following; a threaded hub element, at least one compression nut, "O" ring seal, gasket seal 2 nd and an armour braid clamping element.
  • Figure 1 is a perspective side view of a cable retention bracket according to one embodiment of the present invention
  • Figure 2 is a perspective top view of the cable retention bracket shown in
  • Figure 3 is a perspective view of the cable retention bracket of Figures 1 and 2 shown attached to a cable gland assembly;
  • Figures 4 and 5 are respectively perspective side and bottom views of the cable retention bracket of Figures 1 and 2 shown secured to an electrical apparatus by means of the cable gland assembly;
  • Figures 6a to 6d are schematic diagrams of the cable retention bracket incorporating an IP washer.
  • the bracket comprises a cable guide 4, a spacer element 6 and attachment means 8, the various parts being machined from flat metal.
  • the cable guide 4 comprises a pair of symmetrical members 4a, 4b that define a substantially circular bore 10 between the internal faces of the members for receiving a cable.
  • Suitable fastening means 12 such as a screw, nut and washer arrangement, is provided between the two members for securing them together.
  • a laminated foam ring 14, such as that supplied under the trade name ROXTECH is placed within the bore 10.
  • the spacer element 6 extends from the base of the cable guide 4 to the attachment means 8.
  • the spacer element comprises a pair of arms 6a, 6b that diverge from the cable guide. At the point where the distance between the arms is substantially the same as the width of the attachment means 8, the arms extend parallel to each other to the attachment means.
  • the attachment means comprises a flange extending perpendicularly from the end of the arms 6a, 6b.
  • a cylindrical bore 16 is provided through the flange. The positioning of the bore 16 is such that it lies substantially in the same plane as the bore 10 provided through the cable guide.
  • Figures 3 to 5 illustrate the installation of a cable 60 within the cable retention bracket 2 via a cable gland assembly 20.
  • the bore 16 of the attachment means 8 is placed over a threaded end 22 of a cable gland assembly 20 such that the flange contacts a face of the connector (see Figure 3).
  • a cable 60 is then threaded through the cable guide 4 of the bracket and the cable gland assembly 20, which is then attached to an electrical apparatus 40 by means of the screw fixing 22.
  • the flange 8 of the cable retention bracket is sandwiched between an external face of the cable gland and the electrical housing to secure the bracket in place.
  • the cable guide may be tightened around the cable by adjusting the fastening means 12, as required.
  • the laminated foam ring can also be adjusted to the required thickness by the removal of an appropriate number of layers of the ring to accommodate a particular diameter cable within the bracket.
  • a cable 60 that is connected to a piece of electrical apparatus by means of a cable gland assembly 20 can be easily retained at a specified distance from the gland exit by the cable retention bracket 2 according to the present invention.
  • the incorporation of the bracket adds minimal time to the assembly procedure and considerably reduces the onward cost of designing and fitting remote brackets and/or hooks.
  • the invention also eliminates the requirement for the use of an additional conventional earthing plate, typically used with such gland types, as the earth conductor may be fixed directly to the invention itself, should this be required.
  • An ingress protection washer 70 may be provided within the bore of the attachment means, as illustrated in Figures 6a to 6d of the accompanying drawings. In the assembled unit, the washer fits within the bracket/gland interface to provide a watertight seal.
  • the cable retention bracket illustrated in the accompanying drawings has a cable guide in the same plane as the bore of the attachment means
  • the invention is not limited to this arrangement.
  • the cable gland assembly may include a bend, preferably provided within the spacer element, such that the cable enters the assembly in a different plane to its passage into the electrical apparatus.
  • the attachment means may also differ to that shown, for example, comprising a clamping mechanism for securing the bracket to the gland assembly or the electrical housing. However, this will increase the actions required for installation of the cable within the apparatus and therefore the illustrated arrangement is preferred.
  • the cable retention bracket according to the present invention may be provided as an integral part of a cable gland and connector fixing or fitted retrospectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Installation Of Indoor Wiring (AREA)

Abstract

A cable retention bracket (2) having attachment means (8) for securing the bracket to a part of a cable gland assembly and/or an electrical housing, a cable guide (4) and a spacer element (6) for locating the guide at an appropriate distance from the cable gland assembly and/or electrical housing.

Description

CABLE RETENTION BRACKET
The present invention relates to an improved cable retention bracket.
The installation of cabling into some items of equipment requires the use of a cable gland assembly, such as a Hawke™ universal gland or similar, to prevent the cable chaffing on the edge of the equipment and to provide a means of retention. The cable is threaded though the gland assembly and the wires at the end of the cable are attached to the appropriate connectors contained within the electrical housing, the gland assembly being attached to the housing by means of, for example, a threaded mechanism. The gland within the assembly prevents the ingress of water and other contaminants into the interior to the equipment and, in some cases, provides an explosion proof barrier. In some circumstances, it is necessary for the cable to be physically supported remote from the connection such that strain cannot be applied to the gland should a force be applied to the cable. Typically, this retention is provided by the installation of a remote bracket or hook to which the cable is secured. However, the adequate installation of remote brackets and hooks is a time-consuming and costly process.
An object of the present invention is to provide an improved cable retention bracket that aims to overcome, or at least alleviate, the abovementioned drawbacks.
Accordingly, a first aspect of the present invention provides a cable retention bracket comprising a cable guide and attachment means separated by a spacer element. The cable guide is preferably in the form of an adjustable clamp for receiving the cable. Preferably, the clamp comprises two substantially symmetrical parts for defining a passage therebetween for receiving the cable, in particular each being semicircular in profile, that are held together by suitable fastening means, such as a threaded screw, nut and washer. Alternatively, the cable guide may be substantially circular with a gap extending radially therethrough which may enable loosening and tightening of the clamp around the cable. It is preferable to provide an elastomeric sleeve, such as an 0-ring or, more preferably, a laminated or non-laminated foam ring, within the interior of the guide.
Preferably, the attachment means is in the form of a flange that is spaced apart from the cable guide but extends substantially parallel thereto, being separated therefrom by the spacer element. Preferably, the flange is provided with a bore therethrough, the bore being dimensioned to receive a part of a cable gland assembly, such as a threaded portion thereof. In this manner, the bracket may be secured to an electrical apparatus by the fastening of the gland to the apparatus in the conventional way.
Optionally, an ingress protection washer (IP washer) may be provided within the bore of the flange where conditions require such additional protection. The spacer element may be any suitable member that maintains an appropriate distance between the attachment means and the cable guide. In a preferred embodiment of the present invention, the spacer element comprises at least one arm extending from the cable guide to the attachment means. Preferably, the spacer element comprises a pair of arms that converge towards the cable guide. More preferably still, the arms extend parallel from each side of the attachment means, such as the flange, substantially perpendicularly thereto and then converge- to meet at an apex at the base of the cable guide.
It is to be appreciated that the spacer element may be formed such as to provide a cable guide in the same plane as the bore of the attachment means or the spacer element may be constructed such as to provide a change of plane, thereby accommodating different types of cable gland assemblies.
Preferably, the cable guide, spacer element and attachment means are formed integrally from a single piece of material, for example being injection moulded or machined from a piece of flat metal. The thickness and type of material used for the bracket, in particular, the spacer element, will depend upon the weight of the cable to be supported by the bracket.
It is to be appreciated that the cable retention bracket of the invention is preferably provided as a separate entity for attachment to an existing cable gland assembly. However, the bracket also may be formed as part of the cable gland assembly. To this end, a second aspect of the present invention provides a cable gland assembly that includes a cable retention bracket according to the first aspect of the present invention. The cable gland assembly may include standard components in the art, for example, one or more of the following; a threaded hub element, at least one compression nut, "O" ring seal, gasket seal 2nd and an armour braid clamping element.
For a better understanding of the present invention and to show more clearly how it may be carried into effect reference will now be made by way of example only to the accompanying drawings in which:
Figure 1 is a perspective side view of a cable retention bracket according to one embodiment of the present invention; Figure 2 is a perspective top view of the cable retention bracket shown in
Figure 1;
Figure 3 is a perspective view of the cable retention bracket of Figures 1 and 2 shown attached to a cable gland assembly;
Figures 4 and 5 are respectively perspective side and bottom views of the cable retention bracket of Figures 1 and 2 shown secured to an electrical apparatus by means of the cable gland assembly; and
Figures 6a to 6d are schematic diagrams of the cable retention bracket incorporating an IP washer.
Referring to Figures 1 and 2 of the accompanying drawings, a cable retention bracket 2 according to one embodiment of the present invention is illustrated. The bracket comprises a cable guide 4, a spacer element 6 and attachment means 8, the various parts being machined from flat metal. The cable guide 4 comprises a pair of symmetrical members 4a, 4b that define a substantially circular bore 10 between the internal faces of the members for receiving a cable. Suitable fastening means 12, such as a screw, nut and washer arrangement, is provided between the two members for securing them together. A laminated foam ring 14, such as that supplied under the trade name ROXTECH is placed within the bore 10.
The spacer element 6 extends from the base of the cable guide 4 to the attachment means 8. The spacer element comprises a pair of arms 6a, 6b that diverge from the cable guide. At the point where the distance between the arms is substantially the same as the width of the attachment means 8, the arms extend parallel to each other to the attachment means. The attachment means comprises a flange extending perpendicularly from the end of the arms 6a, 6b. A cylindrical bore 16 is provided through the flange. The positioning of the bore 16 is such that it lies substantially in the same plane as the bore 10 provided through the cable guide.
Figures 3 to 5 illustrate the installation of a cable 60 within the cable retention bracket 2 via a cable gland assembly 20. The bore 16 of the attachment means 8 is placed over a threaded end 22 of a cable gland assembly 20 such that the flange contacts a face of the connector (see Figure 3). A cable 60 is then threaded through the cable guide 4 of the bracket and the cable gland assembly 20, which is then attached to an electrical apparatus 40 by means of the screw fixing 22. The flange 8 of the cable retention bracket is sandwiched between an external face of the cable gland and the electrical housing to secure the bracket in place. The cable guide may be tightened around the cable by adjusting the fastening means 12, as required. Furthermore, the laminated foam ring can also be adjusted to the required thickness by the removal of an appropriate number of layers of the ring to accommodate a particular diameter cable within the bracket. In this manner, a cable 60 that is connected to a piece of electrical apparatus by means of a cable gland assembly 20 can be easily retained at a specified distance from the gland exit by the cable retention bracket 2 according to the present invention. The incorporation of the bracket adds minimal time to the assembly procedure and considerably reduces the onward cost of designing and fitting remote brackets and/or hooks.
The invention also eliminates the requirement for the use of an additional conventional earthing plate, typically used with such gland types, as the earth conductor may be fixed directly to the invention itself, should this be required.
An ingress protection washer 70 may be provided within the bore of the attachment means, as illustrated in Figures 6a to 6d of the accompanying drawings. In the assembled unit, the washer fits within the bracket/gland interface to provide a watertight seal.
Whilst the cable retention bracket illustrated in the accompanying drawings has a cable guide in the same plane as the bore of the attachment means, the invention is not limited to this arrangement. For example, the cable gland assembly may include a bend, preferably provided within the spacer element, such that the cable enters the assembly in a different plane to its passage into the electrical apparatus. The attachment means may also differ to that shown, for example, comprising a clamping mechanism for securing the bracket to the gland assembly or the electrical housing. However, this will increase the actions required for installation of the cable within the apparatus and therefore the illustrated arrangement is preferred.
The cable retention bracket according to the present invention may be provided as an integral part of a cable gland and connector fixing or fitted retrospectively.

Claims

1. A cable retention bracket comprising a cable guide and attachment means separated by a spacer element.
2. A cable retention bracket as claimed in claim 1 wherein the cable guide is an adjustable clamp for receiving the cable.
3. A cable retention bracket as claimed in claim 1 or claim 2 wherein a sleeve is provided in the interior of the guide for surrounding the cable.
4. A cable retention bracket as claimed in any one of claims 1 to 3 wherein the attachment means comprises a flange spaced apart from the cable guide and extending substantially parallel thereto, the flange having a bore therethrough and being separated from the cable guide by the spacer element.
5. A cable retention bracket as claimed in any one of claims 1 to 4 wherein the spacer element maintains an appropriate distance between the attachment means and the cable guide.
6. A cable retention bracket as claimed in claim 5 wherein the spacer element comprises at least one arm extending from the cable guide to the attachment means.
7. A cable retention bracket as claimed in claim 6 wherein the spacer element comprises a.pair of arms that converge towards the cable guide.
8. A cable retention bracket as claimed in claim 7 wherein the arms extend parallel from each side of the attachment means and substantially perpendicularly thereto and converge to meet at an apex at the base of the cable guide.
9. A cable retention bracket substantially as hereinbefore described and with reference to Figures 1 and 2 or 6a to 6c of the accompanying drawings.
10. A cable gland assembly incorporating a cable retention bracket according to any one of claims 1 to 8.
11. A cable gland assembly substantially as hereinbefore described and with reference to Figures 3 to 5 or 6d of the accompanying drawings.
PCT/GB2009/000880 2008-04-10 2009-04-03 Cable retention bracket WO2009125167A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0806508.8 2008-04-10
GB0806508A GB2459146A (en) 2008-04-10 2008-04-10 Cable retention bracket

Publications (1)

Publication Number Publication Date
WO2009125167A1 true WO2009125167A1 (en) 2009-10-15

Family

ID=39433409

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2009/000880 WO2009125167A1 (en) 2008-04-10 2009-04-03 Cable retention bracket

Country Status (2)

Country Link
GB (1) GB2459146A (en)
WO (1) WO2009125167A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102064428A (en) * 2010-10-12 2011-05-18 贵州航天电器股份有限公司 Single-arm cable clip for electric connector
CN104676127A (en) * 2013-11-29 2015-06-03 神钢建机株式会社 Cord-like member holder for working machine
WO2020012059A1 (en) * 2018-07-12 2020-01-16 Maeihaeniemi Janne Fixing device to secure an rj-interface
US20230136617A1 (en) * 2020-03-25 2023-05-04 Hitachi Metals, Ltd. Sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276818A (en) * 1939-11-04 1942-03-17 Gen Electric Electrical connecting device
GB1297666A (en) * 1969-04-03 1972-11-29

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909099A (en) * 1974-06-14 1975-09-30 Anderson Power Products Electrical connector with movably mounted cable clamp
IT1227022B (en) * 1988-07-29 1991-03-08 Ilme Spa CONNECTOR FOR ELECTRIC CABLES WITH PLUG AND STEERING SOCKET.
US6419519B1 (en) * 2000-08-01 2002-07-16 Glenair Inc. Strain relief for electrical connectors
US20080076291A1 (en) * 2006-07-06 2008-03-27 Server Technology, Inc. Electrical plug retainer
US8056869B2 (en) * 2007-09-20 2011-11-15 Tellabs Petaluma, Inc. Static and dynamic cable management bracket
US7544085B2 (en) * 2007-10-24 2009-06-09 Amphenol Corporation Strain relief backshell assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2276818A (en) * 1939-11-04 1942-03-17 Gen Electric Electrical connecting device
GB1297666A (en) * 1969-04-03 1972-11-29

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102064428A (en) * 2010-10-12 2011-05-18 贵州航天电器股份有限公司 Single-arm cable clip for electric connector
CN104676127A (en) * 2013-11-29 2015-06-03 神钢建机株式会社 Cord-like member holder for working machine
EP2878493A1 (en) * 2013-11-29 2015-06-03 Kobelco Construction Machinery Co., Ltd. Holder for cord-like member for working machine
US9464734B2 (en) 2013-11-29 2016-10-11 Kobelco Construction Machinery Co., Ltd. Cord-like member holder for working machine
WO2020012059A1 (en) * 2018-07-12 2020-01-16 Maeihaeniemi Janne Fixing device to secure an rj-interface
US20230136617A1 (en) * 2020-03-25 2023-05-04 Hitachi Metals, Ltd. Sensor

Also Published As

Publication number Publication date
GB0806508D0 (en) 2008-05-14
GB2459146A (en) 2009-10-21

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