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WO1997009543A1 - Serre-cables - Google Patents

Serre-cables Download PDF

Info

Publication number
WO1997009543A1
WO1997009543A1 PCT/GB1996/002107 GB9602107W WO9709543A1 WO 1997009543 A1 WO1997009543 A1 WO 1997009543A1 GB 9602107 W GB9602107 W GB 9602107W WO 9709543 A1 WO9709543 A1 WO 9709543A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
grip
gripping member
gripping
cable grip
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.)
Ceased
Application number
PCT/GB1996/002107
Other languages
English (en)
Inventor
Geoffrey Fraser Atkinson
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.)
Latchways Ltd
Original Assignee
Latchways Ltd
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 Latchways Ltd filed Critical Latchways Ltd
Priority to AU68314/96A priority Critical patent/AU6831496A/en
Publication of WO1997009543A1 publication Critical patent/WO1997009543A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/10—Quick-acting fastenings; Clamps holding in one direction only
    • F16G11/101—Quick-acting fastenings; Clamps holding in one direction only deforming the cable by moving a part of the fastener

Definitions

  • the present invention relates to a device for gripping a flexible support member such as a cable or rope.
  • the invention is concerned with a cable grip for use in load attachment systems in which a load attachment device is movable along an elongate support secured with respect to a fixed support structure.
  • a known load attachment system is described in British Patent No. 1 ,582,201.
  • a flexible elongate element such as a cable is fixedly secured at its ends to a support structure and is also supported at intermediate locations with respect to said structure.
  • the system includes a load-transfer or traversing device which is either used to support the elongate element at each intermediate location, or is engaged with the elongate element to move along it with the ability to traverse the intermediate supports without detachment from the cable.
  • the cable used for the elongate support is usually provided with end ferrules or sleeves swaged thereon, which features are provided with integral couplings for bolting to location fittings secured to the fixed structure.
  • a shock absorbing device may be incorporated between the cable end and the fixed support, as described in the applicant's European patent application number 0 605 538.
  • the present invention is concerned with the erection of such load attachment systems. It is an object of the invention to provide a cable grip which obviates the need to terminate the cable with end ferrules, swaged sleeves or similar cable terminations that require modification of the cable end . It is a further object of the invention to provide a cable grip which is easy to engage and disengage from the cable to assist in the achievement of the desired degree of pre-tensioning during erection of a load attachment system.
  • the invention is a cable grip comprising: a body member defining a cable bed adapted to receive a loop of cable in use; a releasable gripping member operable between a cable release condition and a cable gripping condition, and operating means separate from said gripping member for effecting movement of said gripping member between said release and gripping conditions; characterised in that said operating means includes means to prevent tension in the cable from opening the cable grip when the cable grip is in its fully-closed condition, said means comprising an over-centre mechanism.
  • the operating means for effecting movement of the gripping member between its cable release and cable gripping conditions comprises a lever pivoted to the body member at a first position and pivoted to a gripping member driving link at a second position.
  • the gripping member driving link is, in turn, connected to the gripping member at a position remote from its pivotal connection to the lever.
  • the body member is a metal casting having a pair of up-turned flanges, the internal surfaces of which are concave in cross-section to serve as a cable seat.
  • the cable-engaging surfaces of the gripping member are similarly configured so that, when the device is in the fully closed condition, the trapped loop of cable is gripped snugly around most of its periphery. This helps to equalise loads throughout the gripped length of cable, thereby minimising local stresses.
  • the over-centre action of the operating lever means that, when it is in its fully closed condition, the lever is prevented from being pulled round to its own open position by any tension in the cable.
  • the lever may be provided with a hole for receipt of a padlock shackle.
  • a complimentary hole provided in the body member or, if necessary, an upstanding projection from the body member, allows the lever to be padlocked to the body in order to prevent tampering or accidental release.
  • Figure 1 is a front view of a device according to the present invention, shown in the fully open condition
  • Figure 2 is a sectional side view of the device of Figure 1 shown in the fully closed condition.
  • a cable grip in accordance with the present invention comprises a body member 10 having a pair of upstanding flange members 1 1 , 13 which define a cable seat as described in more detail below.
  • a gripping member 20 is mounted on the body member 10 and is arranged to move in relation thereto between a cable-release condition and a cable-gripping condition.
  • a gripping member driving link 30 is connected to gripping member 20 by means of pivot bolt 1 10 and penny washer 120.
  • An operating lever 40 is pivotally mounted on the body member 10 by means of pivot bolt and nut arrangement 90, 91. Lever 40 is, in turn, connected to driving link 30 by pivot pin 50.
  • driving link 30 is formed with a large cut-out portion 31 into which an upstanding spigot 21 of the gripping member 20 projects.
  • Spigot 21 is surrounded by a resilient bush 130 which is accommodated within the cut ⁇ out portion 31.
  • resilient bush 130 will be explained in more detail below.
  • a spacer bush 60 surrounds the shank of pivot bolt 90 where it passes through slots in the driving link 30 and the gripping member 20.
  • an attachment link 70 journalled on pivot bolt 90, by means of which the cable grip device may be attached to a fixed structure or an intermediate, for example a shock absorbing apparatus as described in the Applicant's European Patent No. 0 605 538.
  • Operating lever 40 has an over-centre action so that, when it is moved from the fully-open condition shown in Figure 1 to the fully-closed condition shown in Figure 2, it passes a neutral or "top dead centre” position and remains biased to the closed condition. This is achieved in the illustrated embodiment by the reaction of the resilient bush 130 against the periphery of cut-out portion 31 of the driving link 30. The biasing pressure urges driving link 30 to the right in Figure 2. The driving link, in turn, exerts a turning force on operating lever 40, effective to keep it in abutment against a projection 12 of flange 1 1 .
  • operating lever 40 is fixedly secured to projection 12 of flange 1 1 by means of a padlock 140, the shackle 141 of which passes through holes 41 and 12a of the lever and flange projection, respectively.
  • the padlock 140 is an optional feature which minimises the risk of accidental release of the operating lever 40 and prevents tampering.
  • Figure 2 it is also possible to see the preferred concave contour of flange 1 1 and the preferred concave outer periphery 22 of gripping member 20. For reasons of clarity, Figure 2 does not show a captive cable in the cable seat. However, the preferred concave contours described above are effective to facilitate a snug grip around much of the cable circumference so that local stresses are minimised.
  • the flanges 11 and 13 are spaced apart but convergent.
  • a gap 14 is provided between the flanges at the end of the body member 1 remote from the fixed structure (not shown).
  • Gripping member 20 has an external profile which is complementary to the convergence of the flanges 1 1 and 13.
  • a part-circular profile 23 is provided at the end of gripping member 20 nearest the fixed structure (not shown).
  • the respective flanges 1 1 and 13 of the body member 10 may be stamped with instructive labels such as "LOADED CABLE THIS SIDE” and "FREE SIDE", as appropriate.
  • the cable grip is first fully opened by rotating the operating lever 40 fully in the clockwise direction (with reference to Figure 1 ). Preferably, it is held nearly horizontal whilst the cable to be anchored is inserted into the correct side of the device as indicated by the labelling on flanges 1 1 , 13.
  • the operating lever 40 is then rotated fully in the counter-clockwise direction (in the sense of Figure 1 ) until it abuts projection 12 of flange 1 1. It is only possible to effect full rotation of the operating lever 40 if the cable is properly seated in the device.
  • the user may then partially release the operating lever 40 so that any undesired slack in the cable can be taken up by pulling on the cable free end. Then the operating lever is re ⁇ engaged. Repetition of this step may be necessary until as much slack is removed from the system as possible. This is effective to achieve a first approximation of the desired pre-tension in the system. Accurate setting of cable tension must be achieved by other means, such as rigging screws or turnbuckles incorporated elsewhere in the system.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Control Devices (AREA)

Abstract

L'invention concerne un serre-câbles pour système de fixation de charge, qui comprend un corps (10) définissant un logement de câbles conçu pour recevoir une boucle de câble, un élément de serrage libérable (20) pouvant passer d'un état de libération du câble à un état de serrage du câble, et un actionneur (40) qui fait passer l'élément de serrage (20) d'un état à l'autre. Le corps (10) peut comporter des rebords droits (11, 13) présentant des surfaces concaves permettant le passage du câble. Le pourtour de l'élément de serrage (20) peut également être concave. L'actionneur (40) assure un verrouillage à arc-boutement qui maintient le serre-câbles à l'état fermé en cours d'utilisation. Le système peut comporter d'autres moyens d'immobilisation (140, non représentés) afin de fixer l'actionneur (40) sur le corps (10), dans le but de réduire au minimum les risques de libératon accidentelle et/ou d'éviter les manipulations non autorisées.
PCT/GB1996/002107 1995-09-06 1996-08-27 Serre-cables Ceased WO1997009543A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU68314/96A AU6831496A (en) 1995-09-06 1996-08-27 Cable grip

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9518224A GB2304791A (en) 1995-09-06 1995-09-06 Cable grip
GB9518224.2 1995-09-06

Publications (1)

Publication Number Publication Date
WO1997009543A1 true WO1997009543A1 (fr) 1997-03-13

Family

ID=10780315

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/002107 Ceased WO1997009543A1 (fr) 1995-09-06 1996-08-27 Serre-cables

Country Status (3)

Country Link
AU (1) AU6831496A (fr)
GB (1) GB2304791A (fr)
WO (1) WO1997009543A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU709308B3 (en) * 1999-05-28 1999-08-26 Cunnington, Maria Elisabeth Rope hitch

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540887A (en) * 1948-12-31 1951-02-06 Auld D L Co Cable-anchoring and -tightening device
GB2018657A (en) * 1978-03-30 1979-10-24 Bartin Ltd Wire gripping devices
GB1582201A (en) * 1978-03-30 1981-01-07 Tupper A W Load-transfer device
EP0187113A2 (fr) * 1984-12-21 1986-07-09 Ogden W. Boden Dispositif de blocage de cordes
WO1989004929A1 (fr) * 1987-11-21 1989-06-01 Charles Henry Bliault Ancrages pour amarres
WO1993006384A1 (fr) * 1991-09-24 1993-04-01 Latchways Limited Dispositif amortisseur

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB883050A (en) * 1959-03-20 1961-11-22 Brown Best & Co Ltd Bag closure means
GB1169020A (en) * 1966-11-09 1969-10-29 Aeroquip Ag Buckle
FR2329480A1 (fr) * 1974-07-04 1977-05-27 Bosredon Pierre De Perfectionnement au montage des ceintures de securite utilisees notamment dans les vehicules automobiles
US3905711A (en) * 1974-10-31 1975-09-16 Marion Power Shovel Co Cable connecting assembly
US4313243A (en) * 1979-04-12 1982-02-02 Childress Ray R Sliding wedge cable clamp
US4536921A (en) * 1981-10-30 1985-08-27 Geroh Gmbh, Mechanische Systeme Cable clamp
US4714238A (en) * 1987-03-05 1987-12-22 Spradley Willie D Hydraulic jacking system for unseating wedge from rope sockets
US5408729A (en) * 1994-03-08 1995-04-25 C.I.S.-Lrc Joint Venture Apparatus for clamping an elongated flexible member

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2540887A (en) * 1948-12-31 1951-02-06 Auld D L Co Cable-anchoring and -tightening device
GB2018657A (en) * 1978-03-30 1979-10-24 Bartin Ltd Wire gripping devices
GB1582201A (en) * 1978-03-30 1981-01-07 Tupper A W Load-transfer device
EP0187113A2 (fr) * 1984-12-21 1986-07-09 Ogden W. Boden Dispositif de blocage de cordes
WO1989004929A1 (fr) * 1987-11-21 1989-06-01 Charles Henry Bliault Ancrages pour amarres
WO1993006384A1 (fr) * 1991-09-24 1993-04-01 Latchways Limited Dispositif amortisseur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU709308B3 (en) * 1999-05-28 1999-08-26 Cunnington, Maria Elisabeth Rope hitch

Also Published As

Publication number Publication date
GB2304791A (en) 1997-03-26
AU6831496A (en) 1997-03-27
GB9518224D0 (en) 1995-11-08

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