WO2003071083A1 - Dispositif d'assistance a la montee d'une echelle - Google Patents

Dispositif d'assistance a la montee d'une echelle Download PDF

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Publication number
WO2003071083A1
WO2003071083A1 PCT/DK2003/000114 DK0300114W WO03071083A1 WO 2003071083 A1 WO2003071083 A1 WO 2003071083A1 DK 0300114 W DK0300114 W DK 0300114W WO 03071083 A1 WO03071083 A1 WO 03071083A1
Authority
WO
WIPO (PCT)
Prior art keywords
ladder
line
wheel
assistance device
person
Prior art date
Application number
PCT/DK2003/000114
Other languages
English (en)
Inventor
Peter Gunnar Petersen
Original Assignee
Avanti Stigefabrik A/S
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 Avanti Stigefabrik A/S filed Critical Avanti Stigefabrik A/S
Priority to AU2003206686A priority Critical patent/AU2003206686A1/en
Publication of WO2003071083A1 publication Critical patent/WO2003071083A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/186—Rail or rope for guiding a safety attachment, e.g. a fall arrest system
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/12—Lifts or other hoisting devices on ladders
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/02—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes rigidly mounted

Definitions

  • the invention relates to a ladder climbing assistance device for use with an essentially vertical ladder, said ladder climbing assistance device comprising: - a line extending along the ladder;
  • Such ladder climbing assistance devices are especially useful in connection with ladders provided in windmills, masts, towers, silos, deep wells, etc. and are of great benefit, wherever maintenance and installation personnel have to carry tools or other ballast with them during their ascent or descent.
  • a known ladder climbing assistance device consists of a line that is connected to a motor driven winch positioned at the lower end of the ladder and extends over a wheel provided at the upper end of the ladder.
  • a slide is provided, said slide being displaceably connected to a rail that extends in the full length of the ladder.
  • the slide is provided with means that allows a person climbing the ladder to connect himself to the slide by means of a short wire connected to a harness worn by the person. In use, the person connects himself to the slide and starts the motor by pulling a string arranged adjacent the ladder.
  • the motor is controlled to provide a constant traction to the line of e.g. 500 N (corresponding to about 50 kg) and the person therefore experiences that his weight is correspondingly reduced. In this way ascending and descending the ladder is substantially facilitated since a person with a body weight of e.g. 80 kg only has to carry 30 kg.
  • Another ladder climbing assistance device is known from JP-A-08199956 that discloses a self-propelled slide that is in driving engagement with a rail extending in the full length of the ladder.
  • the slide is provided with a motor and the driving engagement with the rail entails that the slide can be driven displaceably along the rail in either direction.
  • the climbing force of the slide is adjusted in such manner that the slide lifts most of the weight of a person ascending or descending the ladder, thereby facilitating the ascent or descent.
  • a major disadvantage of these known ladder climbing assistance devices is that the slide - it being self-propelled or suspended by a line - must be positioned at specific location when a person is to ascend or descend the ladder. If a person is at the lower end of the ladder the slide must be displaced to this lower end, if it is not there, and if the person is at the upper end of the ladder the slide must be displaced to this upper end. If only one person is to ascend and later on to descend the ladder, the slide will normally be in the right location since it is located where the person left it after ascending or descending. However, if two or more persons are to ascend or descend the ladder, which is not unusual, the slide must be displaced form the upper end of the ladder to the lower end of the ladder or vice versa before the next person can ascend or descend.
  • a part of the line always extends along the ladder which means that the person or persons ascending or descending can connect themselves to the line at any time and at any location on the line.
  • a first person to ascend the ladder connects himself to the line at the lower end of the ladder and he starts climbing.
  • a second person may then immediately connect himself to the line and start ascending.
  • the line forming a closed loop may also be called an endless line.
  • line when used in this specification is intended to include any form of a flexible, elongate element capable of fulfilling the described function, i.e. including steel wires, ropes, straps, chains and other flexible, elongate elements.
  • the motor is connected to the first wheel provided at the upper end of the ladder, and this first wheel is in frictional engagement with the line.
  • traction is applied to the line directly above the ladder which means that the part of line that is loaded is as short as possible.
  • a line tightening arrangement is provided in order to keep the line stretched at all times.
  • the line tightening arrangement furthermore ensures that the line is kept engaged with the wheels provided at each end of the ladder.
  • a simple form of a line tightening arrangement comprises a third wheel and a freely suspended weight-loaded wheel tightening the line loop.
  • the motor, the first wheel, the second wheel and the third wheel must be supported by any structure that is fixed in relation to the ladder.
  • the motor, the first wheel, the second wheel and the third wheel are supported by the ladder, whereby the ladder climbing assistance device can be easily mounted onto existing ladders if desired.
  • the line has a generally smooth surface which ensures that it can easily be supported by the wheels.
  • the means adapted for connecting a person climbing the ladder with the line comprises a clamping device connected to a harness worn by the person.
  • a clamping device connected to a harness worn by the person.
  • Such clamping device and harness can be of any known kind.
  • Fig. 1 shows a schematic sideview of a ladder climbing assistance device according to the invention
  • Fig. 2 shows a part of a line and a clamping device in a first embodiment for use in the ladder climbing assistance device according to the invention.
  • Fig. 1 shows a schematic sideview of a ladder climbing assistance device according to the invention used in connection with a ladder 1 that is secured to a wall 2 by brackets 3 distributed along the length of the ladder 1.
  • the ladder 1 has an upper end 4 and a lower end 5 and is provided with steps 6, and a person 7 is ascending or climbing the ladder 1.
  • the ladder 1 can be positioned in windmills, masts, towers, silos, deep wells, etc.; the present invention is, however, independent of the use.
  • a motor 8 is provided at the upper end 4 of the ladder 1.
  • the motor 8 is mounted on the end of the ladder 1 and is provided with a first wheel 9.
  • a second wheel 10 is provided at the lower end 5 of the ladder 1 , and this second wheel 10 is also mounted on the ladder 1.
  • a third wheel 11 also supported by the ladder 1 via a bracket 12 is provided between the first and second wheels 9,10 and between the ladder 1 and the wall 2.
  • the motor 8 and the first, second and third wheels 9,10,11 need not be supported by the ladder 1 as such, but may be supported by any other structure that is fixed in relation to the ladder 1.
  • a line 13 forming a closed loop is wound around the first wheel 9, the second wheel 10 and the third wheel 11 as shown.
  • a line tightening arrangement comprising a weight-loaded wheel 14 carrying a weight 15 is provided freely suspended as shown.
  • the line tightening arrangement keeps the line stretched at all times.
  • the line 13 is in frictional engagement with the first wheel 9 that is drivingly connected to the motor 8. This means that when the motor 8 is activated it rotates the first wheel 9 clockwise if the person 7 is ascending while it rotates the first wheel 9 anti-clockwise if the person 7 is descending.
  • the amount of rotation is controlled in such manner that the person 7 experiences a constant upwardly directed force of a predetermined magnitude, e.g. 400 N, corresponding to a lift of about 40 kg.
  • the person 7 approaches the ladder 1 and connects himself to the line 13 by means of any suitable connecting means of which an example is described below with reference to Fig. 2.
  • the connecting means comprises a chain link 16 that is connected to a harness 17 worn by the person 7.
  • the motor 8 is activated by the person pulling a switch rope 18 arranged in proximity of the ladder 1.
  • the switch rope 18 is supported by the ladder 1 and is connected to an on/off switch 19 that activates/deactivates the motor 8 when the switch rope 18 is pulled downwards. This causes the motor 8 to apply a constant traction in the line 13 of e.g. 400 N as described above.
  • the ladder climbing assistance device according to the invention over the prior art devices is that more than one person can utilise the ladder climbing assistance device immediately after each other without having to return a slide or the like.
  • the ladder climbing assistance device according to the invention may even be designed to support two or more persons at the same time, such that these persons are allowed to ascend or descend the ladder simultaneously.
  • Fig. 2 shows a part of the line 13 used in the ladder climbing assistance device shown in Fig. 1 and a preferred embodiment of a clamping device 21 used for connecting a person 7 with the line 13.
  • the line 13 can have any suitable form and be made of any suitable material.
  • the line 13 is a standard rope of the type used in mountain climbing.
  • the clamping device 21 may also be a standard device used in mountain climbing comprising a bent metal plate forming a line guide 22 and provided with a spring-biased pawl 23 and an attachment opening 24.
  • a connector element such as an openable chain link 16 is attached to the attachment opening 24 and is intended for being connected to a harness 17 worn by the person 7 (see Fig. 1).
  • the person 17 connects the chain link 16 to his harness 17, thereby ensuring safe connection of the clamping device 21 with the harness 17.
  • the spring-biased pawl 23 is forced clockwise against the spring force by a finger to the position shown with dotted lines and the line 13 is captured by the line guide 22.
  • the spring-biased pawl 21 is released and a spring causes it to turn anti-clockwise until it engages the line 13. Any force now applied to the line in an upward direction causes the spring-biased pawl 23 to engage the line 13 even stronger, thereby ensuring a safe engagement between the line 13 and the clamping device.
  • the invention has been described with reference to a preferred embodiment of the ladder climbing assistance device.
  • Many of the elements comprised in the device may, however, be shaped differently or be replaced by other elements performing the same function.
  • the line forming the closed loop may be made of any suitable material such as nylon, cotton or even steel or any combination of such materials, e.g. for reinforcement reasons.
  • the line need not be totally smooth over its entire length as there might be provided beads extending outwards from the line for improved engagement with the clamping device.
  • through-going openings may be provided in the line in which connecting means can be attached.
  • the first wheel 9 connected to the motor 8 can be in frictional engagement with the line by any suitable means.
  • the wheel 9 comprises two opposed conical discs forming a V-shaped groove at the rim of the wheel 9. Through-going bores are provided close to the rim, and the inwardly facing edges of these bores provides an excellent frictional engagement with the line.
  • This kind of wheel 9 is only useful if the line is a relatively soft rope that allows the outer surface thereof to be slightly deformed into the through-going bores. If another line type is used, the wheel must be adapted thereto.
  • a fall protection system must normally supplement the ladder climbing assistance device; such fall protection system is, however, well- known in the art and is not a part of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

L'invention concerne un dispositif d'assistance à la montée d'une échelle destiné à être utilisé avec une échelle sensiblement verticale (1). Ce dispositif d'assistance à la montée d'une échelle comprend une ligne (13) tirée le long de l'échelle (1) ; un moteur (8) conçu pour exercer une traction sensiblement constante sur la ligne (13) ; et des moyens prévus pour rattacher une personne (7) montant l'échelle (1) à la ligne (13). Cette ligne (13) forme une boucle fermée entre une première roue (9) située sur une extrémité supérieure (4) de l'échelle (1) et une seconde roue (10) située sur une extrémité inférieure (5) de l'échelle (1).
PCT/DK2003/000114 2002-02-25 2003-02-21 Dispositif d'assistance a la montee d'une echelle WO2003071083A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003206686A AU2003206686A1 (en) 2002-02-25 2003-02-21 Ladder climbing assistance device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200200288 2002-02-25
DKPA200200288 2002-02-25

Publications (1)

Publication Number Publication Date
WO2003071083A1 true WO2003071083A1 (fr) 2003-08-28

Family

ID=27741074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2003/000114 WO2003071083A1 (fr) 2002-02-25 2003-02-21 Dispositif d'assistance a la montee d'une echelle

Country Status (2)

Country Link
AU (1) AU2003206686A1 (fr)
WO (1) WO2003071083A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005088063A1 (fr) 2004-03-12 2005-09-22 Avanti Stigefabrik A/S Procede de regulation de la force de traction du cable du dispositif d'assistance ascensionnelle d'une echelle, et dispositif d'assistance ascensionnelle d'une echelle
WO2005095750A1 (fr) 2004-03-15 2005-10-13 Greifzug Hebezeugbau Gmbh Auxiliaire de pente pour echelles
US7600610B2 (en) 2005-08-31 2009-10-13 Deuer Joseph F Climb assist system
DE102008034384A1 (de) * 2008-07-23 2010-01-28 Bergmann, Dirk Absturzsicherung
WO2010133260A1 (fr) * 2009-05-19 2010-11-25 Siemens Aktiengesellschaft Équipement d'entraînement de sauvetage
WO2010101725A3 (fr) * 2009-03-02 2010-12-16 D B Industries, Inc. Système d'aide à l'escalade
WO2011107817A1 (fr) 2010-03-05 2011-09-09 Tractel Limited Dispositif d'assistance pour un utilisateur d'échelle
US8974334B2 (en) 2011-10-14 2015-03-10 D B Industries, Llc Cable drive and tension assembly
EP3797202A4 (fr) * 2018-05-22 2021-07-07 Branach Technology Pty Ltd Échelle anti-chute

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2041920A5 (fr) * 1969-04-25 1971-02-05 Cloquie Herve
FR2440906A1 (fr) * 1978-11-10 1980-06-06 Moser Robert Rampe mobile du type ascenseur ou descenseur a commande par traction sur l'element formant rampe
FR2518519A1 (fr) * 1981-12-18 1983-06-24 Boisson Bernard Dispositif elevateur adaptable notamment sur les grues a tour, en vue de faciliter le hissage et la descente du grutier
DD261525A1 (de) * 1987-06-05 1988-11-02 Wtz Arbeitsschutz Vorlaufender steigeschutz
FR2682098A1 (fr) * 1991-10-04 1993-04-09 Roux Etudes Realisations Dispositif de securite pour grues, pylones et structures analogues.
DE20216895U1 (de) * 2002-11-02 2003-01-02 Greifzug Hebezeugbau Gmbh Steighilfe für Leitern

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2041920A5 (fr) * 1969-04-25 1971-02-05 Cloquie Herve
FR2440906A1 (fr) * 1978-11-10 1980-06-06 Moser Robert Rampe mobile du type ascenseur ou descenseur a commande par traction sur l'element formant rampe
FR2518519A1 (fr) * 1981-12-18 1983-06-24 Boisson Bernard Dispositif elevateur adaptable notamment sur les grues a tour, en vue de faciliter le hissage et la descente du grutier
DD261525A1 (de) * 1987-06-05 1988-11-02 Wtz Arbeitsschutz Vorlaufender steigeschutz
FR2682098A1 (fr) * 1991-10-04 1993-04-09 Roux Etudes Realisations Dispositif de securite pour grues, pylones et structures analogues.
DE20216895U1 (de) * 2002-11-02 2003-01-02 Greifzug Hebezeugbau Gmbh Steighilfe für Leitern

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005088063A1 (fr) 2004-03-12 2005-09-22 Avanti Stigefabrik A/S Procede de regulation de la force de traction du cable du dispositif d'assistance ascensionnelle d'une echelle, et dispositif d'assistance ascensionnelle d'une echelle
US7987945B2 (en) 2004-03-12 2011-08-02 Avanti Stigefabrik A/S Method for regulating the traction in a line of a ladder climbing assistance device and ladder climbing assistance device
CN1942650B (zh) * 2004-03-12 2010-11-17 阿万蒂斯蒂格工厂公司 调节爬梯辅助设备的绳索上的牵引力的方法及爬梯辅助设备
US7798288B2 (en) 2004-03-15 2010-09-21 Greifzug Hebezeugbau Gmbh Climbing aid for ladders
WO2005095750A1 (fr) 2004-03-15 2005-10-13 Greifzug Hebezeugbau Gmbh Auxiliaire de pente pour echelles
US7600610B2 (en) 2005-08-31 2009-10-13 Deuer Joseph F Climb assist system
DE102008034384A1 (de) * 2008-07-23 2010-01-28 Bergmann, Dirk Absturzsicherung
WO2010101725A3 (fr) * 2009-03-02 2010-12-16 D B Industries, Inc. Système d'aide à l'escalade
RU2522689C2 (ru) * 2009-03-02 2014-07-20 Д Б Индастриз, ЭлЭлСи Способствующее подъему устройство
US9080383B2 (en) 2009-03-02 2015-07-14 D B Industries, Llc Climb assist system
WO2010133260A1 (fr) * 2009-05-19 2010-11-25 Siemens Aktiengesellschaft Équipement d'entraînement de sauvetage
CN102428240B (zh) * 2009-05-19 2014-07-30 西门子公司 营救训练装置
WO2011107817A1 (fr) 2010-03-05 2011-09-09 Tractel Limited Dispositif d'assistance pour un utilisateur d'échelle
US8887865B2 (en) 2010-03-05 2014-11-18 Tractel Limited Device of assistance for a user of a ladder
US8974334B2 (en) 2011-10-14 2015-03-10 D B Industries, Llc Cable drive and tension assembly
EP3797202A4 (fr) * 2018-05-22 2021-07-07 Branach Technology Pty Ltd Échelle anti-chute

Also Published As

Publication number Publication date
AU2003206686A1 (en) 2003-09-09

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