EP1710197A1 - Sicherheitsvorrichtung für Laufkatze eines Krans - Google Patents

Sicherheitsvorrichtung für Laufkatze eines Krans Download PDF

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Publication number
EP1710197A1
EP1710197A1 EP06003352A EP06003352A EP1710197A1 EP 1710197 A1 EP1710197 A1 EP 1710197A1 EP 06003352 A EP06003352 A EP 06003352A EP 06003352 A EP06003352 A EP 06003352A EP 1710197 A1 EP1710197 A1 EP 1710197A1
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EP
European Patent Office
Prior art keywords
cable
carriage
boom
safety device
movable
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.)
Granted
Application number
EP06003352A
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English (en)
French (fr)
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EP1710197B1 (de
Inventor
Jean-Paul Vercherre
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.)
Manitowoc Crane Group France SAS
Original Assignee
Potain SA
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 Potain SA filed Critical Potain SA
Publication of EP1710197A1 publication Critical patent/EP1710197A1/de
Application granted granted Critical
Publication of EP1710197B1 publication Critical patent/EP1710197B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/18—Travelling gear incorporated in or fitted to trolleys or cranes with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements

Definitions

  • the present invention relates generally to the field of tower cranes with a distributing boom, along which is movable a carriage driven by a cable. More particularly, this invention relates to a safety device for the carriage of such a crane, that is to say a device whose function is to automatically immobilize the carriage on the boom of the crane, in case accidental breaking of the cable of displacement of this truck.
  • the boom In a tower crane, in use, the boom is never perfectly horizontal. On the one hand, even for use in a theoretically horizontal position, the bending of the mast and the boom itself place this boom in a slightly inclined position. In particular, if the raised load is located below the front half of a theoretically horizontal boom, the front portion of the boom tilts down. On the other hand, for some tower cranes, there are possibilities of operation with more or less raised boom, so inclined to the horizontal.
  • rocker member is a lever mounted to pivot on the carriage about a horizontal axis, and normally held in an inactive position by the carriage moving cable; when the cable breaks, the lever is released and it tilts, by the effect of gravity, so as to engage in the horizontal lattice of the boom of the crane, to stop the truck.
  • the patent FR 1446400 discloses a crane cart safety device which is based on a somewhat different principle.
  • a lever is pivotally mounted about a horizontal axis on the carriage and it carries brake shoes provided to cooperate with the longitudinal elements of the boom, in case of breakage of the carriage moving cable. Braking of the carriage is thus effected by a frictional contact between parts usually painted steel, so with a low coefficient of friction, hence a braking efficiency itself low.
  • the brake lever when the brake lever is released to stop the truck, the lever will bounce off the boom members and oscillate around its pivot axis, further reducing the speed and efficiency of braking.
  • such a system at best achieves only a more or less strong braking of the carriage by friction against elements of the crane boom, and not a certain stop by abutment contact with an obstacle element in pursuit of moving the carriage.
  • the patent GB 1015255 discloses a movable finger device, engageable in the teeth of a rack in case of breakage of the cable, the movable finger having a terminal ring through which the cable.
  • Such a device ensures only a braking and a "mono-directional" stop, that is to say that it intervenes only in the direction of the down the platform or nacelle, while for a crane boom, the truck must be braked and stopped in a "bi-directional" manner, according to the direction of inclination of the boom portion on which the carriage is located.
  • the addition of a rack is acceptable in the case of a compact hoist, but would be a complex and very expensive solution in the case of a crane boom, whose length can reach 40 to 80 meters .
  • the present invention aims to eliminate these disadvantages, and it is therefore intended to provide a safety device for a crane truck, which has a very high reliability, and which is particularly effective, this device providing a braking and a stop "bi- directional "and also working very satisfactorily if the boom of the crane is strongly raised, knowing that the more the boom is inclined, the greater the risk in case of rupture of the cable is important.
  • the invention provides a safety device for a crane truck in which the functions of detecting the breaking of the cable and of stopping the carriage as a result of the breakage of the cable are clearly separated.
  • the safety device works very well even if the boom is raised strongly, the action of the spring means is not influenced by the inclination of the boom, and the design of this device also avoids any unexpected operation if the cable is only relaxed, without being broken.
  • the solution of the invention remains simple and economical, because it uses the existing mesh of the boom of the crane, regardless of the length of the boom, no additional element such as a rack being necessary.
  • the movable stop member is slidably mounted on the carriage in a direction contained in a longitudinal vertical plane of the boom, and is thus intended to engage in case of breakage. cable, in the horizontal lattice of the arrow.
  • the movable stop element is slidably mounted on the carriage in a direction transverse to a longitudinal vertical plane of the boom, and is thus designed to engage, in the event of breakage of the cable, in a trellis side of the arrow.
  • the cable rupture detection and triggering means are mechanically feasible, in the form of a rocker lever pivotally mounted on the carriage about an axis orthogonal to the direction of sliding of the movable stop element, the tilting lever having a first arm which cooperates with the cable, and a second arm which, except in the event of breakage of the cable, cooperates with a retaining shoulder formed on the movable stop element, maintaining the spring means in a state under stress.
  • the spring means are advantageously constituted by a helical spring, mounted around the movable stop member formed as a cylindrical rod, and normally kept compressed between the aforementioned shoulder of the mobile stop member and a guide member of the movable stop member.
  • the means for detecting cable rupture and tripping can be made electrically or hydraulically, that is to say in the form of a detection lever similar to that previously mentioned, but acting by means of intermediate of an electrical switch, or its hydraulic equivalent, to release the mobile stop member, and allow its engagement in the structure of the arrow.
  • the spring means replaceable by actuating means of the movable stopping element, constituted by a pneumatic cylinder or hydraulic or electric.
  • Figure 1 shows a liftable luffing tower crane to which the present invention is applied.
  • this crane comprises mainly: a fixed base frame 2, bearing on the ground 3; a rotating frame 4 rotatably mounted on the fixed base frame 2; a folding mast 5, articulated by its lower part on the rotating frame 4; a dispensing arrow 6, which in the example shown is an arrow 6 hinged about a horizontal axis on the top of the mast 5 and thus made liftable; a device 7 for retaining the boom 6, in the horizontal position or in the desired inclination ( Figure 1 showing the arrow 6 in the raised position).
  • the arrow 6 which is here triangular section comprises two lower ribs 8, and a single upper chord 9.
  • the two lower chords 8 are connected to each other by transverse bars 10 or “sleepers”, regularly spaced, so as to form a "horizontal" lattice (with reference to the arrow itself in a horizontal position).
  • Each of the two lower ribs 8 is connected to the upper chord 9 by diagonal slits 11, so as to also form two lateral lattices.
  • the two lower ribs 8 form a raceway, for an arrow carriage 12 thus made movable along the entire length of the arrow 6.
  • the carriage 12 is moved along the arrow 6 by means of a cable 13 called “cable distribution "motorized by means of a winch here not detailed, the distribution cable 13 decomposing into a front distribution cable 13a and a rear distribution cable 13b.
  • the crane further comprises a hoisting rope 14, which forms at least two vertical strands under the carriage 12, and on which is suspended a lifting block 15, provided with a hook 16 to which a load (not shown) to be raised can be suspended. .
  • the boom carriage 12 is equipped with a safety device, generally designated by the reference 17, which serves to automatically immobilize the carriage 12 in case of accidental breakage of the distribution cable 13.
  • the safety device 17, and its operation, are illustrated more particularly by FIGS. 2 to 5, to which reference is now made.
  • the safety device 17 is here carried by the rear portion of the frame 18 of the carriage 12, that is to say its nearest part of the top of the mast 5 of the crane.
  • This safety device 17 mainly consists of a movable stop element 19 and a rocker lever 20.
  • the movable stop member 19 is in the form of a cylindrical rod, slidably mounted along an axis A whose direction is contained in a longitudinal vertical plane of the arrow 6, and oriented perpendicularly to the direction of movement of the carriage 12, in other words to the longitudinal direction of the arrow 6.
  • the movable stop member 19 is slidably mounted in a guide block 21 integral with the frame 18 of the carriage 12, and it also slidably traverses a guide tab 22 fixed under the frame 18 of the carriage 12.
  • an annular shoulder 23 which takes place between the guide block 21 and the guide lug 22.
  • a coil spring 24 is mounted around the movable stop member 19, the spring 24 being placed and compressed between the annular shoulder 23 and the guide lug 22.
  • the rear portion of the frame 18 of the carriage 12 carries, close to the movable stop member 19, a short axis 25 orthogonal to the sliding direction A of this movable stop element 19, the axis 25 being more particularly oriented in the direction of travel of the carriage 12.
  • the rocking lever 20 is pivotally mounted by an intermediate sleeve 26 on the axis 25.
  • This rocker lever 20 has a first arm 27 which, starting from the hinge sleeve 26, forms several successive bends and passes on the distribution cable 13, more particularly on the rear distribution cable 13b.
  • the rocking lever 20 also has a second arm 28, opposite to the previous one and of shorter length, which is provided to cooperate with the annular shoulder 23 of the movable stop element 19.
  • Figures 2 and 3 show the components previously described in their normal position, that is to say the position they occupy as long as the distribution cable 13, in particular here the rear distribution cable 13b, is intact and normally tensioned, thus allowing the motorized control of the displacement of the carriage 12 on its raceway.
  • the rocker lever 20 is then held in its position by the support of its first arm 27 on the cable 13, more particularly the rear distribution cable 13b, which is tensioned.
  • the corresponding position of the second arm 28 of the rocking lever 20, which bears against the annular shoulder 23 of the movable stop element 19, is such that this movable stop element 19 is kept lowered, while the spring 24 is compressed.
  • the upper end 19a of this element 19 remains below the plane containing the crosspieces 10 of the lattice "horizontal of the arrow 6.
  • the carriage 12 can thus move freely along the arrow 6, towards the front or the rear according to the arrow F, rolling by its rollers 29 on the raceway formed by the two lower chords 8, connected by sleepers 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
EP20060003352 2005-04-07 2006-02-20 Sicherheitsvorrichtung für Laufkatze eines Krans Active EP1710197B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0503482A FR2884240B1 (fr) 2005-04-07 2005-04-07 Dispositif de securite pour chariot de grue

Publications (2)

Publication Number Publication Date
EP1710197A1 true EP1710197A1 (de) 2006-10-11
EP1710197B1 EP1710197B1 (de) 2010-06-02

Family

ID=35229874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060003352 Active EP1710197B1 (de) 2005-04-07 2006-02-20 Sicherheitsvorrichtung für Laufkatze eines Krans

Country Status (6)

Country Link
EP (1) EP1710197B1 (de)
DE (1) DE602006014613D1 (de)
ES (1) ES2346991T3 (de)
FR (1) FR2884240B1 (de)
PT (1) PT1710197E (de)
RU (1) RU2394748C2 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101823495A (zh) * 2010-03-15 2010-09-08 中国原子能科学研究院 一种燃料倾斜运输轨道车的防坠落的非能动装置
EP2377796A1 (de) * 2010-04-14 2011-10-19 Wilbert Turmkrane GmbH Sicherheitssystem für eine Laufkatze eines Kranes
EP2407412A1 (de) * 2010-07-14 2012-01-18 Wilbert Turmkrane GmbH Sicherheitssystem für eine Laufkatze eines Krans
CN103482509A (zh) * 2013-08-13 2014-01-01 河南卫华重型机械股份有限公司 钢丝绳固定装置
WO2014075276A1 (zh) * 2012-11-15 2014-05-22 中联重科股份有限公司 托绳装置、塔机起重臂及其吊绳防坠方法、塔机
CN107140541A (zh) * 2017-03-20 2017-09-08 无锡职业技术学院 一种检测式起吊机
CN117963722A (zh) * 2024-04-01 2024-05-03 河南新创业起重机械有限公司 一种汽车维修吊装装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022018B (zh) * 2009-09-11 2012-06-27 深圳市海生机房技术有限公司 升降塔以及移动式基站
CN101794146B (zh) * 2010-02-11 2012-03-28 浙江建机科技研发有限公司 用于塔式起重机的管理系统
US8967117B2 (en) 2012-09-05 2015-03-03 Honeywell International Inc. Throttle control assembly with integrated safety switch

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171132B (de) * 1961-05-02 1964-05-27 Reich Fa Wilhelm Turmdrehkran mit einziehbarem Ausleger und an diesem gefuehrter Laufkatze
GB972436A (en) * 1962-07-31 1964-10-14 Stothert & Pitt Ltd A safety device for cranes
GB1008220A (en) * 1963-01-31 1965-10-27 Scharf Gmbh Heinrich Braking device
GB1015255A (en) * 1963-04-19 1965-12-31 Leonard Evans Improvements in or relating to mobile lifts or elevators
FR1446400A (fr) * 1965-06-09 1966-07-22 Expl Des Etablissements Boilot Dispositif de sécurité pour chariot de grue circulant sur volée relevée
US3987915A (en) * 1975-03-21 1976-10-26 Conner John R Tire storage and retrieval system and method
DE19833772A1 (de) * 1998-07-17 2000-01-20 Giesen Leana Absturzsicherung für schienengeführte Aufzüge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1171132B (de) * 1961-05-02 1964-05-27 Reich Fa Wilhelm Turmdrehkran mit einziehbarem Ausleger und an diesem gefuehrter Laufkatze
GB972436A (en) * 1962-07-31 1964-10-14 Stothert & Pitt Ltd A safety device for cranes
GB1008220A (en) * 1963-01-31 1965-10-27 Scharf Gmbh Heinrich Braking device
GB1015255A (en) * 1963-04-19 1965-12-31 Leonard Evans Improvements in or relating to mobile lifts or elevators
FR1446400A (fr) * 1965-06-09 1966-07-22 Expl Des Etablissements Boilot Dispositif de sécurité pour chariot de grue circulant sur volée relevée
US3987915A (en) * 1975-03-21 1976-10-26 Conner John R Tire storage and retrieval system and method
DE19833772A1 (de) * 1998-07-17 2000-01-20 Giesen Leana Absturzsicherung für schienengeführte Aufzüge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101823495A (zh) * 2010-03-15 2010-09-08 中国原子能科学研究院 一种燃料倾斜运输轨道车的防坠落的非能动装置
CN101823495B (zh) * 2010-03-15 2013-03-20 中国原子能科学研究院 一种燃料倾斜运输轨道车的防坠落的非能动装置
EP2377796A1 (de) * 2010-04-14 2011-10-19 Wilbert Turmkrane GmbH Sicherheitssystem für eine Laufkatze eines Kranes
EP2407412A1 (de) * 2010-07-14 2012-01-18 Wilbert Turmkrane GmbH Sicherheitssystem für eine Laufkatze eines Krans
WO2014075276A1 (zh) * 2012-11-15 2014-05-22 中联重科股份有限公司 托绳装置、塔机起重臂及其吊绳防坠方法、塔机
CN103482509A (zh) * 2013-08-13 2014-01-01 河南卫华重型机械股份有限公司 钢丝绳固定装置
CN103482509B (zh) * 2013-08-13 2016-08-10 河南卫华重型机械股份有限公司 钢丝绳固定装置
CN107140541A (zh) * 2017-03-20 2017-09-08 无锡职业技术学院 一种检测式起吊机
CN117963722A (zh) * 2024-04-01 2024-05-03 河南新创业起重机械有限公司 一种汽车维修吊装装置
CN117963722B (zh) * 2024-04-01 2024-05-31 河南新创业起重机械有限公司 一种汽车维修吊装装置

Also Published As

Publication number Publication date
EP1710197B1 (de) 2010-06-02
DE602006014613D1 (de) 2010-07-15
RU2006111319A (ru) 2007-11-10
RU2394748C2 (ru) 2010-07-20
PT1710197E (pt) 2010-09-07
FR2884240A1 (fr) 2006-10-13
FR2884240B1 (fr) 2007-05-18
ES2346991T3 (es) 2010-10-22

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