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WO2018185446A1 - Écrou de sécurité - Google Patents

Écrou de sécurité Download PDF

Info

Publication number
WO2018185446A1
WO2018185446A1 PCT/GB2017/051504 GB2017051504W WO2018185446A1 WO 2018185446 A1 WO2018185446 A1 WO 2018185446A1 GB 2017051504 W GB2017051504 W GB 2017051504W WO 2018185446 A1 WO2018185446 A1 WO 2018185446A1
Authority
WO
WIPO (PCT)
Prior art keywords
securing element
fastener
diameter
securing
nut portion
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/GB2017/051504
Other languages
English (en)
Inventor
Mike Johnson
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.)
Hands Free Bolting Ltd
Original Assignee
Hands Free Bolting 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
Priority claimed from GB1705625.0A external-priority patent/GB2553871A/en
Application filed by Hands Free Bolting Ltd filed Critical Hands Free Bolting Ltd
Publication of WO2018185446A1 publication Critical patent/WO2018185446A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B25B21/004—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type
    • B25B21/005—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose of the ratchet type driven by a radially acting hydraulic or pneumatic piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers

Definitions

  • the present invention relates to a nut for use with tools which are used to apply torque to rotary fasteners such as nuts.
  • the invention relates to a safety nut which secures such a tool to the fastener and prevents such a tool from falling during use.
  • Tools such as spanners, wrenches and hydraulic torque wrenches are used to apply torque to turn objects, usually rotary fasteners such as nuts.
  • manual tools such as spanners and wrenches
  • Hydraulic torque wrenches are power tools used to exert torque on fasteners to either tighten or loosen the fastener.
  • a hydraulic torque wrench is placed around a fastener and is then held in position as the torque is applied.
  • an apparatus for for securing a tool to a fastener on an externally threaded member, the fastener having a diameter, the apparatus comprising:
  • the nut portion having a bore therethrough, the bore being provided with an internal thread corresponding to the thread of the externally threaded member;
  • the securing element having an opening therethrough and being connectable to the nut portion, wherein the securing element has a maximum diameter that is greater than the diameter of the fastener
  • the diameter of the securing element is at least 10mm larger than the diameter of the fastener.
  • the diameter of the securing element must be sufficiently larger than the diameter of the fasteners to prevent the tool from falling from the fastener during use.
  • the securing element is provided with a plurality of projections which extend outwards radially.
  • the maximum diameter of the securing element is considered to be the diameter of a circle circumscribing the tangent edges of the projections.
  • the projections are spaced equally around the securing element.
  • the securing element is rotatable about the nut portion.
  • the positions of the projections can be altered whilst maintaining a tight connection of the nut portion to the bolt. This is an advantage when access to the fastener is difficult.
  • the securing element is a plate.
  • the externally threaded member may be a bolt or a threaded bar.
  • the apparatus is preferably provided in parts such that nut portions with different bore diameters and different thread counts or thread pitches can be used depending on the particular bolt assembly.
  • the apparatus of the invention may be used with any tool which fits over a fastener.
  • the tool may be selected from the group comprising ring spanners, open ended spanners, wrenches, and hydraulic torque wrenches.
  • the nut portion has a front side and a rear side and the securing element is secured to the rear side of the nut portion.
  • the means for fastening the securing element to the nut comprises a split ring such as a circlip.
  • the split ring locates in a groove located on the rear side of the nut portion.
  • the front side of the nut portion is provided with gripping elements. Gripping elements help a user to tighten the apparatus on the bolt.
  • the securing element comprises at least three projections.
  • a method for tightening or loosening a fastener on a bolt comprising the steps of;
  • the position of the securing element relative to the nut may be adjusted by rotating the securing element about the nut.
  • the apparatus includes a flexible attachment element extending from one of the nut portion and the securing element.
  • the securing element may include a hole and the flexible element is attached to the hole.
  • the hole may be comprised in a tab extending from the securing element.
  • the flexible element may be provided with attachment means for attaching the flexible element to another object.
  • the flexible element may comprise a lanyard, typically a flexible wire, with attachment means at each end.
  • the lanyard may be attached to the securing element by a clip such as a key ring and the other end of the lanyard may be provided with a quick release clip.
  • a quick release clip is provided at the free end of the flexible element so that it may be released and reattached to an object as the operator of the tool desires.
  • the flexible element may be fastened to the securing element and or a clip at the free end of the flexible element in a fixed manner.
  • the flexible element may pass through a hole in the securing element to form a loop which cannot be opened easily.
  • the clip at the free end of the flexible element may be attached in a similar way.
  • kit of parts for securing a tool to a fastener on an externally threaded member comprising:
  • each nut portion having a bore therethrough and being provided with an internal thread corresponding to a particular external thread
  • the fastener has a diameter and the or each securing element has a maximum diameter that is greater than the diameter of the fastener
  • the or each securing element comprises a plurality of outwardly extending projections.
  • the maximum diameter of the or each securing element is considered to be the diameter of a circle circumscribing the tangent edges of the projections.
  • the projections are spaced equally around the securing element.
  • the or each securing element is a plate.
  • the apparatus of the invention helps secure a tool to a fastener and allows hands-free operation of power tools such as hydraulic torque wrenches, preventing accidents associated with the use of such tools.
  • Figure la is perspective view, from the front, of an embodiment of the apparatus of the invention.
  • Figure lb is a perspective view, from the rear side, of the embodiment of Figure la;
  • Figure 2a is an exploded view of the apparatus of Figure la;
  • Figure 2b is an exploded view of the apparatus of Figure lb;
  • Figure 3 is a plan view of a fastener;
  • Figure 4 is a plan view of the securing element portion of the apparatus of Figure la;
  • Figure 5 illustrates a hydraulic torque wrench located around a fastener prior to connection of the apparatus of Figure la;
  • Figure 6 illustrates a hydraulic torque wrench located around a fastener with the apparatus of Figure la attached to the bolt adjacent the wrench;
  • Figure 7 is a schematic representation of an alternative embodiment of the apparatus of the invention.
  • the apparatus of the invention shown generally at 1, comprises a nut portion 2, a securing element or plate 3 and a circlip or snap ring 4.
  • the plate 3 is provided with three arms or projections 5 which each extend radially outwards and are spaced equally around the circumference of the plate 3.
  • the nut portion 2 has a bore therethrough the diameter of which corresponds to the bolt to which it is to be attached and the bore is provided with an internal thread 6 which also corresponds to the thread count or pitch of the bolt to which the apparatus is to be attached (see Figures 3 and 4).
  • the plate 3 has a bore therethrough which is shaped to locate over the rear side of the nut portion 2.
  • the circlip 4 which is a semi-flexible ring with open ends, is snapped into place inside a groove 7 on the rear side of the nut portion 2.
  • the circlip 4 secures the plate 3 in place, but still allows the plate 3 to rotate around the nut portion.
  • a kit may be provided comprising several different nut portions, each corresponding to a different bolt diameter and/ or a different thread count or thread pitch.
  • Each nut portion 2 would be connectable to a plate 3 using a circlip 4.
  • the apparatus 1 is assembled with the plate 3 and circlip
  • the diameter Y of the plate 3 must be larger than the across corners diameter, X, of the fastener 10 to enable the plate to prevent a wrench from falling away from the fastener 10.
  • the diameter Y of the plate 3 is considered to by the diameter of a circle circumscribing the tangent edges of the projections 5.
  • the diameter Y of the plate 3 is at least 10mm larger than the cross corners diameter, X, of the fastener 10.
  • apparatus 1 Different sizes may be used with different sized fasteners.
  • the apparatus may be provided in three sizes as follows:
  • a first size may be for use with smaller fasteners 10, typically with an across corners diameter, X, of, for example, between approximately 31 and 70mm.
  • the plate 3, for use with fasteners 10 of this size would typically have an diameter, Y, of approximately 80mm, meaning that the difference between the diameter Y of the plate 3 and the across corners diameter X of the fastener lies in the range 10mm to 49mm.
  • a hydraulic torque wrench 9 is shown set in position around a fastener 10 located on a bolt 11.
  • the apparatus 1 is assembled such that bore diameter and the internal thread 6 of nut portion 2 matches the thread 12 and diameter of the bolt 11.
  • the apparatus 1 is then threaded onto the bolt 11 and tightened by hand, such that the apparatus 1, and particularly the plate 3, is located immediately adjacent the hydraulic torque wrench 9.
  • the nut portion 2 is preferably provided with gripping elements 8 which help a user to hand tighten the apparatus 1 around the bolt 11.
  • Figure 6 illustrates the apparatus 1 in position adjacent the wrench 9.
  • the projections 5 of the plate 3 extend outwardly beyond the diameter of the fastener 10 and interfere with the wrench 9, preventing the wrench 9 from falling off the fastener.
  • connection element in the form of a tab 15 extends from the plate 3 is a connection element in the form of a tab 15.
  • the tab 15 includes a hole 15a.
  • a clip in the form of a keyring 16 is attached to the tab 15 through the hole 15a.
  • a first loop 17a of a lanyard 17 is also attached to the keyring 16.
  • the other end of the lanyard 17 also has a loop 17b.
  • a clip 18 is attached to the loop 17b.
  • the clip 18 is a quick release clip and includes two sprung elements 18a, 18b.
  • the first spring element 18a provides for attachment of the clip 18 to the loop 17b, whilst the second spring element 18b provides for attachment of the clip 18 to another component, for example the torque wrench 9.
  • the advantage of providing a lanyard within the apparatus 1 is that the apparatus may be tethered to another component, thereby reducing the risk of the apparatus becoming lost or falling from a height, which may have potentially dangerous consequences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

L'invention concerne un appareil pour fixer un outil à une attache sur un boulon, le boulon étant fileté et l'attache ayant un diamètre particulier. L'appareil comprend une partie écrou, un élément de fixation et des moyens pour fixer l'élément de fixation à l'écrou. La partie écrou présente un alésage à travers celle-ci et est pourvue d'un filetage interne correspondant au filetage du boulon. L'élément de fixation présente une ouverture à travers celui-ci et peut être relié à la partie écrou. Le diamètre de l'élément de fixation est plus grand que le diamètre de l'attache.
PCT/GB2017/051504 2017-04-07 2017-05-26 Écrou de sécurité Ceased WO2018185446A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1705625.0A GB2553871A (en) 2016-04-07 2017-04-07 Safety nut
GB1705625.0 2017-04-07

Publications (1)

Publication Number Publication Date
WO2018185446A1 true WO2018185446A1 (fr) 2018-10-11

Family

ID=59258263

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2017/051504 Ceased WO2018185446A1 (fr) 2017-04-07 2017-05-26 Écrou de sécurité

Country Status (1)

Country Link
WO (1) WO2018185446A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002101249A1 (fr) * 2001-06-13 2002-12-19 Lempinen, Eelu Dispositif de blocage d'un ecrou ou d'un boulon et dispositif de montage
FR2859657A1 (fr) * 2003-09-16 2005-03-18 Ponticelli Freres Ets Dispositif pour le serrage et le desserage d'ecrous
GB2490376A (en) * 2011-04-28 2012-10-31 Bolting Products Ltd Apparatus and Method for the Remote Removal of Fasteners
US20130312576A1 (en) * 2012-05-25 2013-11-28 Hammer Tight, Inc. Hammer wrench safety device
US20140053691A1 (en) * 2009-10-21 2014-02-27 Elias De Los Santos Nut and Fitting Strike Adapter and Method of Utilizing the Same
WO2017015717A1 (fr) * 2015-07-28 2017-02-02 Kenneth Maxwell Archer Écrou de blocage, ou boulon et rondelle améliorés

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002101249A1 (fr) * 2001-06-13 2002-12-19 Lempinen, Eelu Dispositif de blocage d'un ecrou ou d'un boulon et dispositif de montage
FR2859657A1 (fr) * 2003-09-16 2005-03-18 Ponticelli Freres Ets Dispositif pour le serrage et le desserage d'ecrous
US20140053691A1 (en) * 2009-10-21 2014-02-27 Elias De Los Santos Nut and Fitting Strike Adapter and Method of Utilizing the Same
GB2490376A (en) * 2011-04-28 2012-10-31 Bolting Products Ltd Apparatus and Method for the Remote Removal of Fasteners
US20130312576A1 (en) * 2012-05-25 2013-11-28 Hammer Tight, Inc. Hammer wrench safety device
WO2017015717A1 (fr) * 2015-07-28 2017-02-02 Kenneth Maxwell Archer Écrou de blocage, ou boulon et rondelle améliorés

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