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EP1277495B1 - Auxiliaire de pente - Google Patents

Auxiliaire de pente Download PDF

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Publication number
EP1277495B1
EP1277495B1 EP02015295A EP02015295A EP1277495B1 EP 1277495 B1 EP1277495 B1 EP 1277495B1 EP 02015295 A EP02015295 A EP 02015295A EP 02015295 A EP02015295 A EP 02015295A EP 1277495 B1 EP1277495 B1 EP 1277495B1
Authority
EP
European Patent Office
Prior art keywords
climbing aid
pulling element
aid according
climbing
drive motor
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
EP02015295A
Other languages
German (de)
English (en)
Other versions
EP1277495A1 (fr
Inventor
Norbert Wippich
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.)
Wippich Norbert
Original Assignee
Wippich Norbert
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 DE10163928A external-priority patent/DE10163928A1/de
Application filed by Wippich Norbert filed Critical Wippich Norbert
Publication of EP1277495A1 publication Critical patent/EP1277495A1/fr
Application granted granted Critical
Publication of EP1277495B1 publication Critical patent/EP1277495B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • 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

Definitions

  • the invention relates to a climbing aid to assist a person in overcoming differences in height, in particular when climbing buildings, such as chimneys, lattice masts or wind turbines via ladders, stairs or the like, comprising a fall protection device, a fixed constant tension winch with a drive motor and a pull element driven by the constant tension winch for applying a substantially constant tensile force in an upward direction to the person to be supported, the tensile force being smaller than a weight force component of the person acting counter to the force application direction of the tensile element.
  • a device for automatically securing a climber to a climbing wall which comprises a fall protection device and a device for preventing sagging of a safety rope of the fall protection device, the latter device either from a counterweight or a fixed, motorized driven constant tension winch is formed, which exerts a small upward pulling force on the pull rope and thus on the climber.
  • this device cannot be used as a climbing aid, since it does not allow reversal of movement on the ladder, because the fall protection device blocks movement of the pull rope in the descending direction.
  • this blockage could only be lifted by the climber jumping off the ladder, since otherwise he would not be able to trigger the fall protection device against the pulling force of the winch.
  • the fall protection device also prevents the pulling rope from being lowered for another climber.
  • a safety system for climbing a ladder which comprises a fall protection device and a climbing aid to facilitate the climb, the tensile force of which is applied by a counterweight.
  • the known climbing aid however, the person has to pull the counterweight upwards each time he descends on the ladder with the pulling rope in order to bring it back to a starting position near the deflection roller arrangement for a subsequent ascent. Because part of the weight of the rising person from the counterweight and the rest through a leg standing on a ladder Person is intercepted, this process is very strenuous and laborious because the person has to push himself down on the ladder when descending.
  • the fall protection device is arranged in a stationary manner at the upper end of the ladder and acts on the pull rope.
  • a similar climbing aid is also known from US-A-4,252,214, in which the counterweight connected to the traction cable by means of a pulley block is designed as a piston which moves up and down in a vertical cylinder filled with liquid, and also here when climbing downwards the ladder has to exert a pulling force on the counterweight from the person descending in order to pull it upwards in the piston.
  • a climbing aid with a motor-driven winch which, like the person hanging on the rope, is carried by the rope and which comprises a fall protection device engaging the rope above the winch.
  • this climbing aid does not allow you to get off the rope without disengaging the fall protection device. If the rope is torn above the fall protection device, a fall is also inevitable.
  • Fall protection devices with a slide that can be moved along a guide are basically known per se, as are constant pulling winches with a drive motor and a cable drum, in which the pulling force exerted by a cable drum on a pulling rope of the winch has a predetermined value.
  • Such constant tension winches are used, among other things, as mooring winches for the mooring lines of ships in ports where the pulling rope is hauled in when the force exerted by the respective ship on the free end of the pulling rope decreases as the water level rises to prevent drifting, and where the pulling rope is omitted if, when the water level drops, the force exerted by the respective ship on the free end of the towing rope increases, in order to hang it up to prevent the quay wall.
  • the object of the invention is to improve a climbing aid of the type mentioned at the outset such that the assisted person can stop at any point and can climb up or down as desired, that the climbing aid does not represent a burden for the descending person when descending, and that the free end of the pulling element can be moved back to the lower end of the ladders, stairs or the like more easily, in order to enable other people to ascend and possibly stay together at the upper end of the ladders, stairs or the like.
  • the climbing aid comprises devices for interrupting the energy supply to the drive motor or the transmission of power from the drive motor to the pull element which are separate from the traction element and which can be actuated essentially from any point on the ladder, stairs or the like, and in that the fall protection device is one Includes carriage which is displaceable along a guide separate from the tension element.
  • an economically usable climbing aid is provided for people who only occasionally have to overcome larger height differences on ladders, stairs or the like, which effectively supports the person ascending, which also makes it possible to stop at any point and upwards as desired or continue to climb down, and which does not represent a burden for the descending people when descending.
  • the drive motor is preferably an electric motor, the circuit of which can be closed and interrupted in order to switch the electric motor on or off when the traction element is to be subjected to the constant tensile force when ascending the ladder or to be relieved of the load on the descent.
  • an electric motor other drive motors can in principle also be used, for example internal combustion engines whose ignition can be switched off or switched on as required, hydraulic motors whose pumping rate can be changed as required, or any other motors which allow the power supply or the power transmission to be interrupted , such as Stirling or air engines or spring engines.
  • the constant tension winch comprises torque control devices for generating an essentially constant drum torque and thus an essentially constant force in the tension element, which can include, for example, a turbo coupling, slip coupling, induction coupling or permanent magnet coupling arranged between the drive motor and the drum, or which can be used when using an electric motor or internal combustion engine in the form of an electronic control device or when using Hydraulic motors can be in the form of proportional control, but are not limited to this.
  • a so-called three-phase magnet is preferably used as the drive motor, ie a three-phase asynchronous motor designed to be short-circuit proof, which can be switched on at standstill with full mains voltage and then a constant torque holds that at low speeds, such as those caused by the low ascent speeds when climbing a ladder on the drum, does not change significantly and is therefore referred to as constant in the context of the present invention.
  • the torque of the drum and thus the tensile force exerted by the traction element on an ascending person can be set to a constant fixed value, which is smaller than the weight of an individual person or the smallest weight of a group of people, by an appropriate choice or configuration of the torque control devices , for the use of which the climbing aid is intended, and can be, for example, 500 N for a person's own weight between 700 and 900 N.
  • the tractive force can be adjusted as required, for example by regulating the voltage applied to an electric motor or the distance between two clutch disks of a magnetic clutch.
  • a cord switch with which, for example, the circuit of an electric motor used as a drive motor can be interrupted or closed or the ignition of an internal combustion engine used as a drive motor can be switched off or on .
  • a remote control can also be used, for example to adjust a switch in the electric motor circuit or an actuator of the torque control device.
  • the constant tension winch can be arranged at the upper end of the ladders, stairs or the like, which is preferred, for example, with ladders or stairs in shafts or wells. where the top of the ladder is at ground level.
  • the constant draft winch is preferably located at the lower end of the ladders or stairs, with its traction element being deflected via a deflection device at its upper end.
  • the constant tension winch can in principle also be arranged at any level in between.
  • the tension element unwinds from the drum of the constant tension winch when the energy supply to the drive motor or the power transmission to the tension element is interrupted.
  • the pulling element can be pulled off the drum with a relatively small force, this force being able to be applied either easily by the person descending on the ladders, stairs or the like, to whose seat belt or harness the free end of the pulling element is attached , or by a return weight attached to the free end of the pulling element, the weight of which pulls the free end of the pulling element down, for example after an interruption in the energy supply to the drive motor of the constant tension winch and after loosening from the seat belt or harness to the lower end of the ladder or stairs.
  • another advantageous embodiment of the invention provides that the direction of rotation of the constant tension winch can be reversed in order to bring the free end of the tension element released from the seat belt or harness after a person has climbed back up to the lower end of the ladder, stairs or the like, where it can be connected to another person's seat belt or harness for the ascent.
  • the climbing aid can be used not only as a support for people in overcoming differences in height, but also for material transport by connecting the free end of the pulling element to a material transport container or the like, which can be moved along the ladders, stairs or the like by a guide.
  • This guide can be formed, for example, by a tensioned rope, or alternatively, in the case of ladders, for example by a ladder bar or a rail parallel to the ladder bars, on which the transport container can be displaced.
  • the guide can also form part of a safety device that must be present on higher ladders or stairs in accordance with the applicable safety regulations in order to prevent people from falling if they lose their grip on the ladder or stairs.
  • These safety devices which are known per se, generally consist of a safety slide which can be moved along the guide and which blocks in the event of a fall and prevents the person from falling freely.
  • the climbing ladder 2 shown in the drawing for a wind power plant essentially consists of a vertical support beam 4, which is fastened at regular vertical intervals by brackets (not shown) to the inner wall of the rotor mast of the wind power plant.
  • the support bar 4 carries a plurality of laterally protruding pairs of rungs 6, the are attached to the support bar 4 at equal intervals.
  • a safety carriage 8 of a fall protection device can be guided along the support bar 4 and is intended to prevent a person 10 climbing up or down on the ladder 2 from falling.
  • the safety carriage 8 comprises a safety lever 11 which is pivotally mounted in the carriage 8, is connected to a safety belt 14 of a harness 16 via a safety rope 12 and causes a positive or frictional holding engagement of the carriage 8 with the support bar 4 when it falls when the person falls 10 is pivoted down.
  • the harness 16, which must be put on by the ascending person 10 before ascending over the ladder 2, has a construction and mode of operation known to the person skilled in the art and is therefore not to be described in more detail.
  • the climbing aid essentially consists of a so-called constant tension winch 18, which in the exemplary embodiment shown is mounted near the lower end of the ladder 2 on the bottom of the rotor mast of the wind power installation, and a pull rope 20 which is mounted on the top of the ladder 2 Deflection pulley 22 is guided, one end of which is wound on a cable drum 24 of the constant tension winch 18 and its other free end can be connected to the belt harness 16, so that with the aid of the pull cable 20 an upward pulling force on the belt harness 16 and thus on one can be exercised on the climbing ladder 2 upward person 10 to facilitate this person 10 the ascent.
  • the free end of the traction cable 20 can be connected directly to the harness 16, for example by means of a snap hook or the like, but in the exemplary embodiment shown engages on a return carriage 26 which is displaceable above the securing slide 8 on the support bar 4 of the ladder 2.
  • This can with a tether 28 be connected to the harness 16, preferably in the chest area, so that the person 10 is held in an upright position by the harness 16 when he slips on the ladder 2 when climbing and hangs on the tether 28.
  • the constant tension winch 18 comprises a reduction gear 32 arranged between the drive motor 30 and the cable drum 24, and a hydrokinetic clutch or turbo clutch 34 arranged between the reduction gear 32 and the drive motor 30 is housed together with the drive motor 30 and the reduction gear 32 in a housing 36.
  • the clutch 34 is set such that the cable drum 24 is acted upon by a substantially constant torque when the drive motor 30 is switched on. This torque corresponds to a tensile force in the pull rope 20 that is less than the dead weight of the respective person 10 climbing up the ladder 2.
  • a so-called rotating field magnet i.e. a short-circuit proof three-phase asynchronous motor
  • the constant standstill torque can be adjusted by changing the applied voltage.
  • Such rotary field magnets are available, for example, from Georgii Kobold, August Heine GmbH & Co., Leinfelden-Echterdingen, Germany.
  • a torque is preferably set which corresponds to a tensile force in the traction rope 20 of approximately 500 N, so that when the climbing aid is used, a person 10 climbing up the ladder 2 is pulled upward with this tensile force during her ascent and thus with one Body weight of 750 N the energy expenditure required to climb the ladder 2 is reduced to about a third.
  • the ascent is finished or should be stopped, for example to descend on ladder 2
  • the The tensile force in the pull rope 20 is relieved by the person standing on the ladder 2 by interrupting the energy supply to the drive motor 30 or the power transmission from the drive motor 30 to the cable drum 24.
  • two cord switches 40, 42 are provided in a feed circuit of the drive motor 30, which are each actuated by a pull cord 44, 46 parallel to the vertical ladder 2 to the left and right of the vertical ladder 2.
  • the two pull cords 44, 46 are guided upwards in annular guides (not shown) along the ladder 2 and are connected near the upper end of the ladder 2 by a two-armed rocker arm 48 which is articulated in the middle to the ladder bar 4.
  • the circuit of the drive motor 30 is interrupted by the cord switch 40, while in the latter case it is closed by the cord switch 42, so that both the switching on and the switching off of the drive motor 30 by pulling down on the corresponding pull cord 44, 46 can be done.
  • the two cord switches 40, 42 are arranged at the upper end of the ladder.
  • the dead weight of the return carriage 26 is selected such that it is greater than the sum of the dead weight of the traction rope 20 between the rope drum 24 and Deflection pulley 22 and the frictional resistance of the cable drum 24 of the switched off constant tension winch 18. This means that the return slide 28 automatically moves downward after the drive motor 30 of the winch 18 has been switched off along the support beam 4, if after loosening from the harness 16 at the upper end of the Tragholms 4 the head 2 is released. A dead weight of the return slide 26 of 50 N is usually sufficient for this.
  • the direction of rotation of the constant tension winch 18 is also advantageously reversed by actuating the pull cords 44, 46, but in this case the circuit in both cord switches 40, 42 is closed by a first pull on the associated pull cord and interrupted by a further pull.
  • the two cord switches 40, 42 supply current with reversed polarity to the drive motor 30 of the constant tension winch 18, so that one is used to switch the upward movement on and off and the other one to switch the downward movement on or off.
  • a fixed holder for the upper ends of the pull cords 44, 46 can also be provided, which in this case is actuated by pulling up once or twice.
  • a rotating field magnet When using a rotating field magnet as a constant tension winch, it can also be provided that two different voltages are applied to the rotating field magnet, namely a higher voltage that generates a standstill torque corresponding to a tensile force of approx. 500 N and a lower voltage that a standstill torque corresponding to a tensile force of generated approximately 50 N, so that the tensile forces exerted by the constant tension winch 18 and the return slide 26 are approximately balanced.
  • This lower voltage is switched on by a main switch (not shown) and is due to the rotating field magnet on when the higher voltage has been switched off with one of the cord switches.
  • a proportional control or the like can be provided, with which at least one of the voltages applied to the rotating field magnet can be changed, in order in this way to increase the torque of the constant tension winch 18 and thus the tensile force in the pull rope 20 to the weight of an ascending person 10, the return slide 26 or one Adjust end of the pull rope 20 or attached to the return slide 26 load.
  • the free end of the traction cable 20 which can be connected to the harness 16 does not have to be pulled down by hand, as in the prior art, in order to facilitate the ascent of a further person 10 with the climbing aid 2.
  • the return sled 26 can be moved simply by switching off the drive motor 30 or reversing its direction of rotation to the lower end of the ladder 2, where the harness 16 of another person 10 for a new ascent with the sled 26 can be connected.
  • the support bar 4 serving as a guide for the return carriage 26 is provided at its upper and lower ends with a mechanical lock which prevents the return carriage 26 from leaving its guide.
  • the return carriage 26 itself is further designed such that a tool container (not shown) can be attached, the weight of which, including the weight of its contents and the weight of the return carriage 26, is below the set tensile force in the pull rope of 500 N, so that the tool container passes through Turning the drive motor 30 can be pulled up.
  • the part of the pulling cable 20 which runs between the inner wall of the rotor mast and the conductor 2 from the cable drum 24 to the deflecting pulley 22 is, like pulling cords 44, 46, the cord switch 40, 42 guided in guides to prevent the pulling rope 20 or the pull cords 44, 46 from hitting.
  • These guides are preferably in the form of eyebolts, welded or cast parts (not shown), which are fastened to the rear of the ladder 4 at regular intervals and protrude laterally and each have an eye for the passage of the pull rope 20 and the pull cords 44, 46 ,

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Glass Compositions (AREA)
  • Steroid Compounds (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Claims (10)

  1. Auxiliaire d'ascension destiné à supporter une personne devant surmonter des différences de hauteur, en particulier devant escalader des bâtiments, tels que des cheminées, des pylônes ou des installations éoliennes par le biais d'échelles, d'échelons ou similaires, comprenant un dispositif de protection contre les chutes, un treuil d'amarrage automatique fixe avec un moteur d'entraînement et un élément de traction entraîné par le treuil d'amarrage automatique, pour appliquer une force de traction essentiellement constante dans une direction orientée vers le haut sur la personne à supporter, la force de traction étant inférieure à une composante de force de pesanteur de la personne agissant à l'encontre de la direction d'application de la force de l'élément de traction, caractérisé en ce qu'il comprend des dispositifs (40, 42, 44, 46, 48) séparés de l'élément de traction pour interrompre l'apport d'énergie au moteur d'entraînement (30) ou la transmission de force du moteur d'entraînement (30) à l'élément de traction (20), lesquels peuvent être actionnés essentiellement depuis chaque position des échelles (2), échelons ou similaires, et en ce que le dispositif de protection contre les chutes comprend un glissoir (8) qui peut être déplacé le long d'une coulisse (4) séparée de l'élément de traction (20).
  2. Auxiliaire d'ascension selon la revendication 1, caractérisé en ce que les dispositifs (40, 42, 44, 46, 48) comprennent au moins un interrupteur de cordon (40, 42) et au moins un cordon d'actionnement (44, 46) s'étendant le long des échelles (2), échelons ou similaire.
  3. Auxiliaire d'ascension selon la revendication 1, caractérisé en ce que les dispositifs pour interrompre l'apport d'énergie ou la transmission de force comprennent une commande à distance sans fil, dont l'actionnement transmet un signal à un interrupteur ou un dispositif de réglage du treuil d'amarrage automatique.
  4. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le treuil d'amarrage automatique (18) présente un dispositif (24) pour enrouler l'élément de traction (20) qui se trouve en course libre après une interruption de l'apport d'énergie ou du transfert de force.
  5. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le treuil d'amarrage automatique (18) présente un dispositif (24) pour enrouler l'élément de traction (20), dont le sens de rotation peut être inversé.
  6. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le treuil d'amarrage automatique (18) comprend un dispositif de commande de couple de rotation (34) qui assure une force de traction essentiellement constante dans l'élément de traction (20) pendant un apport d'énergie au moteur d'entraînement (30).
  7. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 6, caractérisé en ce que des couples de rotation ou des forces de traction différents peuvent être ajustés sur le treuil d'amarrage automatique (18).
  8. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 7, caractérisé par un élément de rappel (26) connecté ou pouvant être connecté à l'extrémité libre de l'élément de traction (20), lequel peut être déplacé le long d'une coulisse stationnaire et de préférence le long de la coulisse (4) pour le glissoir (8) du dispositif de protection contre les chutes.
  9. Auxiliaire d'ascension selon la revendication 8, caractérisé en ce que la force de traction appliquée par le treuil d'amarrage automatique (18) sur l'élément de traction (20) peut être ajustée à une valeur telle qu'elle s'équilibre essentiellement avec la force de la pesanteur de l'élément de rappel (26).
  10. Auxiliaire d'ascension selon l'une quelconque des revendications 1 à 9, caractérisé par un conteneur de transport de matériel pouvant être connecté à l'extrémité libre de l'élément de traction (20) ou de l'élément de rappel (26).
EP02015295A 2001-07-20 2002-07-10 Auxiliaire de pente Expired - Lifetime EP1277495B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10134704 2001-07-20
DE10134704 2001-07-20
DE10163928 2001-12-22
DE10163928A DE10163928A1 (de) 2001-07-20 2001-12-22 Steighilfe

Publications (2)

Publication Number Publication Date
EP1277495A1 EP1277495A1 (fr) 2003-01-22
EP1277495B1 true EP1277495B1 (fr) 2003-09-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02015295A Expired - Lifetime EP1277495B1 (fr) 2001-07-20 2002-07-10 Auxiliaire de pente

Country Status (3)

Country Link
EP (1) EP1277495B1 (fr)
AT (1) ATE249267T1 (fr)
DK (1) DK1277495T3 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN102536107A (zh) * 2011-12-15 2012-07-04 上海和蕴机电科技有限公司 登高助力装置及其操作方法
US11745035B2 (en) 2019-01-14 2023-09-05 Msa Technology, Llc Fall protection compliance system and method

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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
DE202004004117U1 (de) 2004-03-15 2004-05-13 Greifzug Hebezeugbau Gmbh Steighilfe für Leitern
US8141681B2 (en) 2008-04-07 2012-03-27 Safeworks, Llc Tower climbing assist device
US20100219016A1 (en) * 2009-03-02 2010-09-02 D B Industries, Inc. Fall arrest assembly
DE102009040133B4 (de) 2009-09-04 2022-02-24 Christofer Born Sportgerät
WO2011101333A1 (fr) * 2010-02-16 2011-08-25 Aip Aps Système destiné à la protection des personnes qui utilisent des échelles
US8887865B2 (en) 2010-03-05 2014-11-18 Tractel Limited Device of assistance for a user of a ladder
CN105936482B (zh) * 2016-06-11 2019-07-26 界首永恩机电科技有限公司 一种攀梯助力器
CN107489944A (zh) * 2017-07-27 2017-12-19 安徽工程大学 一种具有智能攀爬结构的路灯
CN110562345B (zh) * 2019-09-27 2024-05-14 上海交通大学 具有防坠落装置的磁吸式爬壁机器人
CN111375154B (zh) * 2020-04-17 2024-05-31 福建省特种设备检验研究院 一种塔机攀爬安全带吊挂装置及其使用方法
CN111543905B (zh) * 2020-05-08 2021-08-27 四川先成科技有限责任公司 一种人体攀爬装置及其控制方法
CN111734297B (zh) * 2020-08-04 2024-12-27 浙江正泰新能源开发有限公司 一种爬梯
CN113090098B (zh) * 2021-03-30 2024-02-13 湖南省永盛电力器材有限公司 一种用于信号塔的电力钢杆
CN114209998B (zh) * 2021-12-23 2023-02-03 广东电网有限责任公司 一种高空作业安全防护方法
CN114949814B (zh) * 2022-06-10 2024-03-08 安庆师范大学 一种幼儿攀岩教学用防掉落安全牵引机构

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102536107A (zh) * 2011-12-15 2012-07-04 上海和蕴机电科技有限公司 登高助力装置及其操作方法
CN102536107B (zh) * 2011-12-15 2014-03-05 上海和蕴机电科技有限公司 登高助力装置及其操作方法
US11745035B2 (en) 2019-01-14 2023-09-05 Msa Technology, Llc Fall protection compliance system and method

Also Published As

Publication number Publication date
ATE249267T1 (de) 2003-09-15
DK1277495T3 (da) 2004-01-19
EP1277495A1 (fr) 2003-01-22

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