EP2374986B1 - Fallschutzvorrichtung für einen ausziehbaren Leitersatz - Google Patents

Fallschutzvorrichtung für einen ausziehbaren Leitersatz Download PDF

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Publication number
EP2374986B1
EP2374986B1 EP20100159593 EP10159593A EP2374986B1 EP 2374986 B1 EP2374986 B1 EP 2374986B1 EP 20100159593 EP20100159593 EP 20100159593 EP 10159593 A EP10159593 A EP 10159593A EP 2374986 B1 EP2374986 B1 EP 2374986B1
Authority
EP
European Patent Office
Prior art keywords
ladder
tackle
rope
segment
telescopic
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.)
Active
Application number
EP20100159593
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English (en)
French (fr)
Other versions
EP2374986A1 (de
Inventor
Heiner Hoersch
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.)
Iveco Magirus AG
Original Assignee
Iveco Magirus AG
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 Iveco Magirus AG filed Critical Iveco Magirus AG
Priority to ES10159593T priority Critical patent/ES2402030T3/es
Priority to EP20100159593 priority patent/EP2374986B1/de
Priority to JP2011087039A priority patent/JP5684637B2/ja
Publication of EP2374986A1 publication Critical patent/EP2374986A1/de
Application granted granted Critical
Publication of EP2374986B1 publication Critical patent/EP2374986B1/de
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Classifications

    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C7/00Component parts, supporting parts, or accessories
    • E06C7/18Devices for preventing persons from falling
    • E06C7/186Rail or rope for guiding a safety attachment, e.g. a fall arrest system
    • EFIXED CONSTRUCTIONS
    • E06DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06CLADDERS
    • E06C1/00Ladders in general
    • E06C1/02Ladders in general with rigid longitudinal member or members
    • E06C1/04Ladders for resting against objects, e.g. walls poles, trees
    • E06C1/08Ladders for resting against objects, e.g. walls poles, trees multi-part
    • E06C1/12Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic

Definitions

  • the present invention relates to a telescopic ladder set with a falling safety device according to the preamble of claim 1.
  • Telescopic ladder sets of fire fighting vehicles are often equipped with falling safety devices to prevent fire workers entering the ladder from falling down in a rescue situation.
  • An example of a known ladder set with a falling safety device according to the preamble of claim 1 is disclosed in JP 2009001995 .
  • Such falling safety devices comprise a rope that runs along the extension direction of the ladder and is tensioned between a lower point at the bottom of the ladder set and an upper point located at one of the ladder segments, which may be the top most extractable ladder segment.
  • a person climbing the ladder can engage the rope by means of an engaging unit that is part of the personal equipment of the fire worker.
  • This engaging unit follows the person's position on the ladder by sliding along the rope. It may also comprise an absorbing means to dampen the impact of the load when the person falls down from the ladder and is stopped in this falling movement by the engaging unit that clinches into the rope.
  • a rope guiding means further comprise means for tensioning the rope between an upper and a lower tensioning point between which the absorber unit can be engaged and run along the length of the ladder.
  • the rope is deflected at the lower tensioning point at the bottom of the ladder by deflection pulleys and wound onto a spring drum that provides a predetermined tension on the rope.
  • a spring drum that provides a predetermined tension on the rope.
  • Another aspect of the spring drum tensioning system is that the spring drum itself consumes a lot of space at the mounting of the telescopic ladder, and the system is generally expensive.
  • the rope guiding means of the falling safety device comprises a deflection pulley suspended at the top end of a top ladder segment, and a tackle arrangement disposed between this top ladder segment and a bottom ladder segment from which the top ladder segment is telescopically extractable.
  • This tackle arrangement comprises two groups of tackle pulleys, namely a lower group of tackle pulleys suspended near the bottom end of the top ladder segment and an upper group of tackle pulleys suspended near the top end of the bottom ladder segment.
  • the rope runs from a lower fixing point at the bottom of the telescopic ladder set up to the deflection pulley, is deflected there downwards and runs further over the tackle pulleys of the tackle arrangement to an upper fixing point at the bottom ladder segment. That is, between its lower fixing point and its upper fixing point, the rope is repeatedly deflected by the deflection pulley and the tackle pulleys. When the rope passes the tackle arrangement, it is subsequently deflected alternately by the tackle pulleys of the lower and upper groups.
  • the rope may run down to a first tackle pulley belonging to the lower group (and being fixed near the bottom end of the top ladder segment), then up to a second tackle pulley belonging to the upper group (being fixed near the top end of the bottom ladder segment), again down to a third tackle pulley belonging to the lower group, and so on. Because the distance between the tackle pulleys belonging to the different groups changes with the extension state of the top ladder segment with respect to the bottom ladder segment, the length of the rope sections connecting tackle pulleys that are subsequently passed by the rope also changes. Because a plurality of tackle pulleys is passed subsequently when the rope runs through the tackle arrangement, this change can compensate for the change of the extension length of the ladder. The total number of tackle pulleys necessary for compensating the change can be chosen suitably.
  • the rope is always biased between its fixing points without the need of any spring drum mechanism. There is no danger that the person guided by the rope can fall from the ladder and unwind the rope so that she or he falls down against an interfering object.
  • Another advantage is that the tackle pulley arrangement can be received space consuming between the top and the bottom ladder segment.
  • the construction according to the present invention is less expensive than the conventional spring drum mechanism.
  • the total number of tackle pulleys deflecting said rope when it passes said tackle arrangement is equal to the number of extractable ladder segments of the telescopic ladder set.
  • the telescopic ladder set comprises four segments in total, namely one segment fixed to the turning/inclining suspension on the fire fighting vehicle carrying the ladder set and three further ladder segments arranged telescopically extractable from this ladder segment.
  • the number of extractable ladder segments is equal to three.
  • the number of tackle pulleys comprised within the tackle arrangement is also equal to three.
  • the lower group of tackle pulleys can comprise two tackle pulleys suspended at the bottom end of the top ladder segment, and the upper group of tackle pulleys comprises only one tackle pulley fixed near the top end of the bottom ladder segment.
  • the rope After being deflected by the deflection pulley, the rope runs down to the lowest tackle pulley of the lower group of tackle pulleys, up to the tackle pulley of the upper group, again down to the second tackle pulley of the lower group and finally up to its upper fixing point at the bottom ladder segment.
  • one further tackle pulley should be added to the tackle arrangement to compensate the elongated extension length of the ladder.
  • the upper group of tackle pulleys can comprise this additional fourth tackle pulley.
  • the rotation axis of the deflection pulley stands perpendicular to the rotation axis of the tackle pulleys.
  • the rotation axis of the tackle pulleys stands generally vertical to the plane of the rungs of the ladder segments so that they can be received between the ladder segments without consuming too much mounting space.
  • the deflection pulley may stand vertically in this case, i. e. its rotation axis lying within the plane of the rungs of the ladder set.
  • the top ladder segment represents the top most extractable ladder segments of the telescopic ladder set, and it is slidably mounted on top of the bottom ladder segment.
  • the rope is connected to the lower fixing point by a tension spring.
  • This tension spring is arranged to compensate length changes of the rope due to temperature and unpreciseness of the rope guiding means.
  • the telescopic ladder set 10 in Fig. 1 comprises four ladder segments in total, namely a first ladder section 12, a second ladder section 14, a third ladder section 16 and a fourth ladder section 18.
  • the first ladder section 12 is mounted turnably to be inclined upwards and downwards on top of a fire fighting vehicle.
  • the other three ladder segments 14,16 and 18 are telescopically extractable from the first ladder segment 12. This means that a subsequent ladder segment, for example, the second ladder segment 14, is extractable from a foregoing ladder segment (like the first ladder segment 12 in this example) by a sliding movement on the foregoing ladder segment that is actuated by a respective drive (not shown).
  • top ladder segment which is the fourth ladder segment 18
  • bottom ladder segment 16 with respect to the top ladder segment 18.
  • the telescopic ladder set 10 comprises a falling safety device 20 comprising a rope 22 that runs along the extension direction of the telescopic ladder set 10 between a lower fixing point 24 at the bottom of the first ladder segment 12 to an upper fixing point 26 at the top end of the bottom ladder segment 16.
  • top and bottom refer to the extension movement of the telescopic ladder set 10, so that any “bottom” part is located on the side closer to the general suspension of the whole ladder set 10, while the term “top” refers to the free end of the ladder set 10 (disposed on the top side in Fig. 1 ).
  • the rope 22 is guided and tensioned via guiding means that will be explained in the following. These guiding means also compensate the change of the extraction length of the rope 22 between the bottom of the ladder set 10 and its top end.
  • the rope guiding means comprise a deflection pulley 28 suspended at the top end of the top ladder segment 18, and a tackle arrangement 30 disposed between the bottom ladder segment 16 and the top ladder segment 18.
  • the pulleys of this tackle arrangement are received directly under the top ladder segment 18 and over the bottom ladder segment 16 within the rungs of the two ladder segments so that the mounting space needed for the tackle arrangement 30 is very small. While the rotation axis of the deflection pulley 28 stands horizontal within in the plane of the rungs of the top ladder segment 18, the rotation axis of the pulleys of the tackle arrangement 30 stands perpendicular to the rungs of the ladder segments 16,18. This means that the pulleys of the tackle arrangement 30 lie flat between the ladder segments 16 and 18.
  • the tackle arrangement 30 comprises two groups of tackle pulleys, namely a lower group 32 of tackle pulleys suspended near the bottom end of the top ladder segment 18, and an upper group 34 of tackle pulleys suspended near the top end of the bottom ladder segment 16. That is, the respective tackle pulleys of the lower group 32 and the upper group 34 are suspended at different ladder segments 16 and 18 that are extractable from each other.
  • the lower group 32 moves towards the upper group 34, shortening the distance between the two opposed groups 32 and 34 of tackle pulleys of the tackle arrangement 30.
  • this extraction movement the distance between the deflection pulley 28 and the lower group 32 of tackle pulleys is not changed, because the deflection pulley 28 and the lower group 32 are located at opposite ends of one and the same ladder segment 18.
  • the tackle arrangement 30 comprises three tackle pulleys in total, namely a first tackle pulley 36 belonging to the lower group 32 and being suspended at the bottom end of the top ladder set 18, a second tackle pulley 38 suspended at the top end of the bottom ladder segment 16, and a third tackle pulley 40 mounted in the bottom region of the top ladder segment 18 but more towards its top end than the first tackle pulley 36. That is, the first tackle pulley 36 and the third tackle pulley 40 belong to the lower group 32, while the upper group 34 only comprises the second tackle pulley 38.
  • the rope 22 extends along the extension length of the ladder set 10 up to the deflection role 28 and is deflected there to run downwards into the tackle arrangement 30.
  • the rope 22 first passes the first tackle pulley 36, is deflected by it to run up to the second tackle pulley 38, runs down again to the third tackle pulley 40 and is there deflected to run up to its upper fixing point 26.
  • an engaging unit as part of the personal equipment of a person climbing the ladder set 10 can be engaged so that this person is safely connected to the rope 22.
  • This engaging unit can run freely on the rope 22 between the lower fixing point 24 and the deflection pulley 28.
  • This engaging unit can also comprise an absorber unit to absorb a shock due to the load when a person falls into the rope 22. Also in this emergency case of catching a falling person, the rope 22 keeps its tension as described above.
  • Fig. 2 shows another embodiment of a falling safety device 50 in a ladder set 52.
  • the telescopic ladder set 52 comprises one more ladder segment than the telescopic ladder set 10 described before in connection with Fig. 1 so that there are four extractable ladder segments to be extracted from one fixed ladder segment at the bottom suspension of the telescopic ladder set 52.
  • This ladder segment 54 can be inclined and turned around a suspension (not shown) of the whole telescopic ladder set 52, while a second ladder segment 56, a third ladder segment 58, a fourth ladder segment 60 and a fifth ladder segment 62 are subsequently mounted slidably onto each other to represent the extractable ladder segments 56,58,60,62.
  • the basic construction of the falling safety device 50 is the same as that of the falling safety device 20 described before, that is, it comprises a rope 22 being fixed at a lower fixing point at the bottom of the ladder set 52 and is deflected by rope guiding means and is fixed, on the other hand, at an upper fixing point 26.
  • the "top ladder segment” is represented by the fifth ladder segment 62
  • the "bottom ladder segment” is represented by the fourth ladder segment 60 carrying the fifth ladder segment 62 so that the fifth ladder segment 62 is extractable and mounted slidable on the fourth ladder segment 60.
  • the deflection role 28 is mounted in the same way as in the foregoing embodiment.
  • the tackle arrangement 30 is disposed between the bottom ladder segment 60 and the top ladder segment 62.
  • the tackle arrangement 30 comprises an additional tackle pulley 64 belonging to the upper group 34 of tackle pulleys and being rotatably fixed near the top end of the bottom ladder segment 60. That is, in this embodiment the tackle arrangement 30 comprises four tackle pulleys in total, namely the first tackle pulley 36, the second tackle pulley 38, the third tackle pulley 40 and the additional fourth tackle pulley 64.
  • the rope 22 is deflected to pass the fourth tackle pulley 64 to be deflected again and to run down to the upper fixing point 26 that is located, in this case, at the bottom end of the bottom ladder segment 60.
  • an additional tackle pulley 64 there is also an additional rope segment 66 between the fourth tackle pulley 64 and the upper fixing point 26 to be shortened or elongated when the telescopic ladder set 52 is extracted or retracted. This compensates the additional extension length due to the provision of the fifth ladder segment 52 with regard to the foregoing embodiment of the telescopic ladder set 10.
  • one additional tackle pulley can be provided so that the rope 22 is deflected one more time, and there is an additional extended/shortened rope section.
  • the number of tackle pulleys within the tackle arrangement 30 can correspond to the number of extractable ladder segments. While in the foregoing embodiment, the number of tackle pulleys (three) within the tackle arrangement 30 corresponds to a number of extractable ladder segments 14,16,18, this number has been increased by one in the present embodiment of the telescopic ladder set 52, showing four tackle pulleys within the tackle arrangement 30, corresponding to the number of four extractable ladder segments 56,58,60,62.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Claims (5)

  1. Teleskopleitersatz (10, 52) mit einer Fallsicherheitseinrichtung (20, 50), wobei der Teleskopleitersatz (10, 52) eine Vielzahl von Leitersegmenten (12, 14, 16, 18; 54, 56, 58, 60, 62) umfasst, die zumindest ein unteres Leitersegment (16, 60) und ein oberes Leitersegment (18, 62), das teleskopisch aus dem unteren Leitersegment (16, 60) ausziehbar ist, umfassen, wobei die Fallsicherheitseinrichtung (20, 50) ein Seil (22), das im Gebrauch entlang der Auszugsrichtung des Teleskopleitersatzes (10, 52) zumindest zwischen einem unteren Punkt in der Nähe des Unterteils des Teleskopleitersatzes und einem oberen Punkt, der an einem der Leitersegmente angeordnet ist, verläuft, und Seilführungsmittel zum Führen des Seils (22) umfasst, wobei das Seilführungsmittel eine Umlenkscheibe (28), die an dem oberen Punkt, der an dem oberen Ende des oberen Leitersegments (18, 62) angeordnet ist, aufgehängt ist, und eine Flaschenzuganordnung (30) umfasst, die zwischen dem unteren Leitersegment (16, 60) und dem oberen Leitersegment (18, 62) angeordnet ist,
    wobei die Flaschenzuganordnung (30) eine untere Gruppe (32) von Flaschenzugscheiben (36, 40), die nahe bei dem unteren Ende des oberen Leitersegments (18, 62) aufgehängt sind, und eine obere Gruppe (34) von Flaschenzugscheiben (38, 64) umfasst, die nahe bei dem oberen Ende des unteren Leitersegments (16, 60) aufhängt sind, wobei das Seil (22), wenn es die Flaschenzuganordnung (30) durchläuft, aufeinanderfolgend abwechselnd durch Flaschenzugscheiben (36, 38, 40, 64) der unteren und oberen Gruppe (32, 34) umgelenkt wird,
    dadurch gekennzeichnet, dass
    das Seil (22) von einem unteren Befestigungspunkt (24) an dem Unterteil des Leitersatzes bis zu der Umlenkscheibe (28) und weiter hinunter über die Flaschenzuganordnung (30) zu einem oberen Befestigungspunkt (26) an dem Oberteil des unteren Leitersegments (16, 60) läuft.
  2. Teleskopleitersatz nach Anspruch 1,
    dadurch gekennzeichnet, dass die Gesamtzahl von Flaschenzugscheiben (36, 38, 40, 64), die das Seil (22) umlenken, wenn es die Flaschenzuganordnung (30) durchläuft, gleich der Zahl von ausziehbaren Leitersegmenten (14, 16, 18; 56, 58, 60, 62) des Teleskopleitersatzes (10, 52) ist.
  3. Teleskopleitersatz nach einem der Ansprüche 1 oder 2,
    dadurch gekennzeichnet, dass die Drehachse der Umlenkscheibe (28) senkrecht zur Drehachse der Flaschenzugscheiben (36, 38, 40, 64) steht.
  4. Teleskopleitersatz nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, dass das obere Leitersegment (18, 62) das oberste ausziehbare Leitersegment des Teleskopleitersatzes (10, 52) darstellt, und dass es verschiebbar an dem Oberteil des unteren Leitersegments (16, 60) montiert ist.
  5. Teleskopleitersatz nach einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, dass das Seil (22) durch eine Zugfeder (48) mit dem unterem Befestigungspunkt (24) verbunden ist.
EP20100159593 2010-04-12 2010-04-12 Fallschutzvorrichtung für einen ausziehbaren Leitersatz Active EP2374986B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES10159593T ES2402030T3 (es) 2010-04-12 2010-04-12 Dispositivo de seguridad frente a caídas para un conjunto de escalera telescópica
EP20100159593 EP2374986B1 (de) 2010-04-12 2010-04-12 Fallschutzvorrichtung für einen ausziehbaren Leitersatz
JP2011087039A JP5684637B2 (ja) 2010-04-12 2011-04-11 伸縮梯子セット用落下安全装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100159593 EP2374986B1 (de) 2010-04-12 2010-04-12 Fallschutzvorrichtung für einen ausziehbaren Leitersatz

Publications (2)

Publication Number Publication Date
EP2374986A1 EP2374986A1 (de) 2011-10-12
EP2374986B1 true EP2374986B1 (de) 2012-12-26

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ID=42635185

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Application Number Title Priority Date Filing Date
EP20100159593 Active EP2374986B1 (de) 2010-04-12 2010-04-12 Fallschutzvorrichtung für einen ausziehbaren Leitersatz

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EP (1) EP2374986B1 (de)
JP (1) JP5684637B2 (de)
ES (1) ES2402030T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015042277A1 (en) * 2013-09-18 2015-03-26 Wing Enterprises, Incorporated Ladders including rope and pulley system and fall protection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9422769B2 (en) * 2013-11-08 2016-08-23 Embraer S.A. Force-balancing mechanisms especially useful for assisted lifting/lowering of aircraft stairs
KR102486515B1 (ko) 2020-12-21 2023-01-06 주식회사 현대에버다임 추락방지용 와이어 장치 및 이를 포함하는 고가 사다리차

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1586508A3 (ru) * 1985-01-12 1990-08-15 Альберт Бекер Гмбх Унд Ко., Кг (Фирма) Блокирующее устройство дл телескопических направл ющих звеньев подъемника
JPH078799Y2 (ja) * 1991-01-17 1995-03-06 関東梯子株式会社 伸縮自在梯子の掛金具
FR2712916A1 (fr) * 1993-11-26 1995-06-02 Mounier Alain Dispositif de tension d'un câble de sécurité.
CA2181858A1 (en) * 1996-07-23 1998-01-24 Richard Williamson Method and apparatus for prevention of falls from extension ladders
JP4801011B2 (ja) * 2007-06-19 2011-10-26 紀美代 中尾 梯子長調整装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015042277A1 (en) * 2013-09-18 2015-03-26 Wing Enterprises, Incorporated Ladders including rope and pulley system and fall protection
CN105980652A (zh) * 2013-09-18 2016-09-28 伟英企业有限公司 包括绳索滑轮系统以及坠落保护的梯子

Also Published As

Publication number Publication date
JP2011220103A (ja) 2011-11-04
JP5684637B2 (ja) 2015-03-18
EP2374986A1 (de) 2011-10-12
ES2402030T3 (es) 2013-04-26

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