EP1373121B1 - Automatic locking device for a lifting block - Google Patents

Automatic locking device for a lifting block Download PDF

Info

Publication number
EP1373121B1
EP1373121B1 EP02711212A EP02711212A EP1373121B1 EP 1373121 B1 EP1373121 B1 EP 1373121B1 EP 02711212 A EP02711212 A EP 02711212A EP 02711212 A EP02711212 A EP 02711212A EP 1373121 B1 EP1373121 B1 EP 1373121B1
Authority
EP
European Patent Office
Prior art keywords
winch
rope
frame
disc
locking
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.)
Expired - Lifetime
Application number
EP02711212A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1373121A1 (en
Inventor
Giorgio Veroni
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.)
Veroni Srl
Original Assignee
Veroni Srl
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 Veroni Srl filed Critical Veroni Srl
Publication of EP1373121A1 publication Critical patent/EP1373121A1/en
Application granted granted Critical
Publication of EP1373121B1 publication Critical patent/EP1373121B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B66D3/10—Applications of braking or detent devices

Definitions

  • the invention relates to a self-locking safety winch. These winches are very often used in building sites and in general in the field of civil and mechanical constructions to raise and lower loads of all types, with manual operation by two operators, one on the ground and the other located at the same height as the winch.
  • the main aim of the present invention is to provide a self-locking safety winch of contained size and weight, as well as being economical.
  • a further aim of the present invention is that it provides a self-locking safety winch wherein the braking action is gradual and non-violent and therefore limits wear on the rope, lengthening the working life thereof.
  • a further aim of the present invention is to provide a self-locking safety winch which is reliable and safe for operators and third persons, for improving safety at the workplace.
  • a further aim of the invention is to provide a self-locking safety winch which is easy to maintain.
  • 1 denotes in its entirety a self-locking safety winch according to the present invention.
  • the safety winch 1 essentially comprises a disc 1 which rotates about a shaft 4 mounted on a frame 5.
  • the disc 2 has a gullet 3 along a circumferential surface.
  • the frame 5, for compactness and simplicity, as well as for increasing operator safety, is preferably a shaped as a closed box, having one or more upper walls 7, one or more side walls 8 and one or more lower walls 9. On at least one of the lower walls there is at least one opening 10 through which the rope 11 passes into the frame 5.
  • the frame 5 is normally provided with special means for suspending 6 for mounting the winch 1 on a suitable support structure (not illustrated in the figure), fixed or mobile depending on the operator's choice.
  • this means for suspending 6 can be a hook 6a fixed to the upper wall 7 of the frame 5.
  • the rope 11 obviously exhibits two ends: one end is the pull end 12 which is generally manoeuvred by the operator located on the ground, and the other end is the load end 13 to which the load to be raised or lowered is secured.
  • the means for locking 14 are mounted on the frame 5 of the winch 1 at the disc 2 position, and are operatively active on the rope 11 on the pulling end 12; the means for locking comprise at least one fixed element 14a constrained to the frame and at least one mobile element 14b.
  • the fixed element 14a in a preferred and non-exclusive embodiment, exhibits a cylindrical conformation and can also comprise a special gullet around its circumferential surface.
  • the mobile element 14b operates between a near position hard by the fixed element 14a, in which the rope 11 is locked between the fixed element 14a and the mobile element 14b, and a distanced position away from the fixed element 14a, in which the rope is free to run.
  • the mobile element 14b in a preferred and non-exclusive embodiment, is wedge-shaped and comprises a flat contact surface 15 positioned on the same side as the rope and on the opposite side with respect to the disc 2.
  • the contact surface 15 is provided with an inclined end 18 so as better to engage the rope 11 during the locking phase.
  • the mobile element 14b also comprises a curved guide surface 19 located on the same side as the disc 2 and on the opposite side with respect to the rope 11, so as better to suit the profile of the circumferential surface of the disc 2, for example so that it can insert in the gullet 3 of the disc 2.
  • the mobile element 14b also exhibits, on the guide surface 19, a longitudinal slot 16 which engages on a fixed pivot 17 mounted on the frame 5.
  • the above-described characteristics enable the mobile element 14b to move, with respect to the fixed element 14a, between a distanced position and a near position, and vice versa.
  • the rope 11 is therefore blocked between the mobile element 14b and the fixed element 14a, and the load on the load side 13 of the rope 11 cannot fall dangerously to earth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Pulleys (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
EP02711212A 2001-04-02 2002-01-29 Automatic locking device for a lifting block Expired - Lifetime EP1373121B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT2001RE000031A ITRE20010031A1 (it) 2001-04-02 2001-04-02 Carrucola di sicurezza autobloccante
ITRE20010031 2001-04-02
PCT/IT2002/000043 WO2002079069A1 (en) 2001-04-02 2002-01-29 Automatic locking device for a flifting block

Publications (2)

Publication Number Publication Date
EP1373121A1 EP1373121A1 (en) 2004-01-02
EP1373121B1 true EP1373121B1 (en) 2005-07-13

Family

ID=11454076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02711212A Expired - Lifetime EP1373121B1 (en) 2001-04-02 2002-01-29 Automatic locking device for a lifting block

Country Status (6)

Country Link
EP (1) EP1373121B1 (it)
AT (1) ATE299469T1 (it)
DE (1) DE60205020T2 (it)
ES (1) ES2245400T3 (it)
IT (1) ITRE20010031A1 (it)
WO (1) WO2002079069A1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE531962C2 (sv) * 2007-09-26 2009-09-15 Selden Mast Ab Linlås för segelbåt
FR2922200B1 (fr) * 2007-10-12 2010-04-23 Marcel Jose Peltier Systeme de poulie a descente de charge freinee
WO2011042571A1 (es) * 2009-10-05 2011-04-14 Muelas Allegue, Jesus Maria Dispositivo de seguridad pombo para frenado, ajuste de tensión y retención de carga en poleas
JP6312223B2 (ja) * 2015-10-13 2018-04-18 株式会社古屋興産 荷降ろし補助具

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1167295A (en) * 1914-12-07 1916-01-04 John Smith Hall Pulley-block.
JPS499333Y1 (it) * 1970-11-24 1974-03-05
US4934660A (en) * 1987-10-02 1990-06-19 D B Industries, Inc. Device for raising and lowering loads
US5615865A (en) * 1995-03-08 1997-04-01 Fountain; Edward Automatically engaging and disengaging pawl and pulley lifting mechanism

Also Published As

Publication number Publication date
ITRE20010031A1 (it) 2002-10-02
WO2002079069A1 (en) 2002-10-10
EP1373121A1 (en) 2004-01-02
DE60205020D1 (de) 2005-08-18
ES2245400T3 (es) 2006-01-01
ITRE20010031A0 (it) 2001-04-02
DE60205020T2 (de) 2006-06-01
ATE299469T1 (de) 2005-07-15

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