EP0166701A1 - Système auxiliaire de sécurité pour une grue à tour pivotante - Google Patents

Système auxiliaire de sécurité pour une grue à tour pivotante Download PDF

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Publication number
EP0166701A1
EP0166701A1 EP85830146A EP85830146A EP0166701A1 EP 0166701 A1 EP0166701 A1 EP 0166701A1 EP 85830146 A EP85830146 A EP 85830146A EP 85830146 A EP85830146 A EP 85830146A EP 0166701 A1 EP0166701 A1 EP 0166701A1
Authority
EP
European Patent Office
Prior art keywords
slewing
crane
section
auxiliary safety
tower
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.)
Withdrawn
Application number
EP85830146A
Other languages
German (de)
English (en)
Inventor
Carmelo Fiumefreddo
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0166701A1 publication Critical patent/EP0166701A1/fr
Withdrawn legal-status Critical Current

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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
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/88—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/26—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail

Definitions

  • the invention relates to an auxiliary safety system for crane and particularly for tower crane with horizontal slewing jib, with or without an opposite jib for counter-weight, that is to say a system the auxiliary function of which is to give the greatest safety either to both slewing jibs against yieldings of those mechanical members or elements which are provided to maintain them in their horizontal slewing state, and the upper section of the crane tower in its satisfactory slewing motion about its own vertical axis, also when the component members and elements are subjected to sudden, unexpected stresses which exceed the limits usually forecast.
  • This upper slewing section of the crane tower is generally mounted on a thrust bearing and provided with gear pairs to carry out an efficient slewing motion about its vertical axis, such members as well as other component elements (e.g. lock-bolts ) being however subjected to serious drawbacks when the crane structure cannot be maintained in its designed condition.
  • Such mechanism is generally forced by a horizontally operating crown gear and one or two pinions driven by a geared motor whose axis is vertical.
  • the coupled members of the mechanism are solid for the stationary and slewing section of the tower, respectively and a person skilled in the art knows that the one and/or the other of these members are often so stressed by moments of different kind, that some deformations are provid-ed which relate, for example, to the teeth and/or lock-bolts.
  • the invention as claimed is intended to remedy the drawbacks and disadvantages of cranes still now proposed and applied in accordance with the prior art. It solves the problem of how to provide an auxiliary safety system for tower crane with slewing jib/jibs, which may also be applied on cranes of the type usually used, not expensive modifications of its structure being only necessary which are neverthless suitable to give the maximal operative safety also for a long time.
  • the claimed auxiliary safety system comprises:
  • crane 10 selected as an example of embodiment to describe the invention is provided with an operative jib 11 and an opposite jib 12 to support a counter-weight, substantially as in a conventional tower crane of this type.
  • Stationary section 13 and slewing section 14 of a trestle tower crane 10 are also of a conventional type, and this latter section 14 has solid for operative jib 11 and opposite counter-weight jib 12.
  • a cage 16 as auxiliary safety eans in accordance with the invention, the features and function of which will be explained below.
  • Such cage 16 is placed around stationary section 13 of crane tower 10, solid for this latter or forming a single piece with same, and is in any case extended from the area of the thrust bearing 15 of slewing section 14 up to a height considered sufficient to carry out its function in accordance with the invention.
  • the thrust bearing is not a part of the invention and is then not described here, but indicated only by that numeral reference 15 between stationary section and slewing section 13 and 14, respectively of the crane tower.
  • operative jib 11 and jib 12 to support a counter-weight has been schematically shown in Fig.l to evidence the solid connection of same with slewing section 14 of the crane tower.
  • Conventional tension rods 17 and 18 are also shown to support the crane jibs, the features of which must obviously be suitable to ensure the strength against unexpected, sudden stresses for variations of load at the free end 19 of protruding jib 11. Such variations give rise to corresponding variations of moments and are obviously dependent on the distance from the central vertical axis of the slewing upper section 14.
  • Tension rods 17, 18 may be replaced by tension ropes, if desired, and that which relates to operative jib 11 is evidently much more subjected to additional stresses because of variations of load, the effects of which may be actually dangerous when sudden and remarkable, as said above.
  • the auxiliary safety means for jibs 11 and 12 comprises ropes 20, 21, the function of which is that of elastic tension ropes as they are connected to and operating through spiral springs to improve the strength condition of the jibs and particularly of the operative jib 11 during any sudden and remarkable variation at its free end 19.
  • Tension ropes 20, 21 have like arrangement, so that it is suffi- ci-ent to make reference to tension rope 20 only which concerns jib 11, to explain the application and function.
  • a plate 22 is provided to which one end of both ropes 20, 21 is fastened.
  • a support 25 solid for the jib structure is provided with a horizontal threaded through-hole wherein a screw 26 is inserted and movable to allow the regulation of elastic tension rope 20 through a tension spiral spring 28. To one end of this latter is hooked the free end of rope 20, while the other end of spiral spring 28 is connected to the corresponding end of screw 26.
  • a nut 27 is provided to define the right elastic tension of rope 20.
  • auxiliary safety means for jibs 11 and 12 of a tower crane 10 may carry out an efficient function either through the own features of tension ropes 20, 21 and the selected features of springs 28, as each spring acts as an intermediate elastic means between top plate 22 and the structure of corresponding jib 11 or 12.
  • auxiliary safety means of the system according to the present invention is to be considered as very important regarding the maintenance of the axis of slewing section 14 in its vertical central position.
  • slewing section 14 is still provided with a trestle structure.
  • a more satisfactory application of this auxiliary safety means was found by providing for a slight lowering of the bottom end of the slewing section 14 in respect to conventional cranes of this type, wherein the connection with stationary section 13 is provided through a thrust bearing 15.
  • auxiliary safety means is formed by a cage 16 of a quadrangular shape like slewing section 14 and stationary section 13, if desired, which in any case must allow the free rotation of slewing section 14 inside same.
  • this auxiliary safety means is to discharge on the stationary vertical structure of crane 10 those eventual stresses which could damage the component members and elements carrying out the angular motion of the slewing section about its central vertical axis, and particularly the gear toothings in thrust bearing area as well as the lock-bolts p ro- vided in the slewing and stationary sections of the crane.
  • cage 16 of this embodiment has a quadrangular shape like slewing section 14 and extends vertically at least from an upper stretch of stationary section 13 up to a height of slewing section 14 which is considered sufficient to reach the desired finality.
  • a top collar 30 is solid for cage 16 and within the inner perimetrical surface of same the slewing section 14 of crane 10 may freely rotate.
  • collar 30 is solid for cage 16 and then for the stationary structure of crane 10, so that it constitutes a very suitable component to discharge thereon those eventual, unexpected stresses which have a negative effect as regards the safety features of crane 10, either for the operation and stability during a satisfactory period of time.
  • slewing section 14 of crane 10 is provided with rollers 31 outside the trestle structure, which are rotatirg freely about vertical axses, for example as shown in Fig.4.
  • each one of these rollers may, in its turn, be mounted on support which allows that radial shift which pushes the roller elastically against the inner perimetrical surface of collar 30 by rolling thereon, in order to continuously maintain ths axis of slewing section 14 and solidly connected jibs 11, 12 in its vertical position, any eventual angular motion in respect to the vertical, referred to the supporting base,being only within the tolerance limits.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)
EP85830146A 1984-06-13 1985-06-13 Système auxiliaire de sécurité pour une grue à tour pivotante Withdrawn EP0166701A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT3161984U IT8431619V0 (it) 1984-06-13 1984-06-13 Sistema supplementare di sicurezza per gru a torre telescopica costituito da funi regibracci e gabbia di sostegno del telescopaggio braccio e controbraccio
IT3161984U 1984-06-13

Publications (1)

Publication Number Publication Date
EP0166701A1 true EP0166701A1 (fr) 1986-01-02

Family

ID=11234044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85830146A Withdrawn EP0166701A1 (fr) 1984-06-13 1985-06-13 Système auxiliaire de sécurité pour une grue à tour pivotante

Country Status (2)

Country Link
EP (1) EP0166701A1 (fr)
IT (1) IT8431619V0 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103303816A (zh) * 2013-07-01 2013-09-18 张家港市天运建筑机械有限公司 塔机的套架滚轮组件
CN106081958A (zh) * 2016-07-26 2016-11-09 潘燕 一种塔式起重机在线监测系统
CN106081911A (zh) * 2016-08-29 2016-11-09 孟玲 一种塔式起重机在线监测系统
CN107673246A (zh) * 2017-11-14 2018-02-09 中建三局第建设工程有限责任公司 一种内爬塔吊限位导向装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191415558A (en) * 1914-02-18 1915-02-18 Charles Wolfe Blue Improvements in and relating to Tower Derricks.
DE1024696B (de) * 1954-08-14 1958-02-20 Menck & Hambrock Gmbh Kran, Bagger od. dgl. mit am Hauptausleger angeordnetem Spitzenausleger
FR1296149A (fr) * 1961-06-09 1962-06-15 Foeneter S A Installation pour le transport des matériaux, éventuellement des personnes, sur un chantier
GB1183609A (en) * 1966-05-25 1970-03-11 Edilmac S P A Tower Cranes
US3752326A (en) * 1972-02-01 1973-08-14 Levingston Shipbuilding Co Offshore oil and gas well drilling rig
FR2172044A1 (fr) * 1972-02-17 1973-09-28 Cadillon Roger
FR2200088A1 (fr) * 1972-09-26 1974-04-19 Kaltenbach Werner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191415558A (en) * 1914-02-18 1915-02-18 Charles Wolfe Blue Improvements in and relating to Tower Derricks.
DE1024696B (de) * 1954-08-14 1958-02-20 Menck & Hambrock Gmbh Kran, Bagger od. dgl. mit am Hauptausleger angeordnetem Spitzenausleger
FR1296149A (fr) * 1961-06-09 1962-06-15 Foeneter S A Installation pour le transport des matériaux, éventuellement des personnes, sur un chantier
GB1183609A (en) * 1966-05-25 1970-03-11 Edilmac S P A Tower Cranes
US3752326A (en) * 1972-02-01 1973-08-14 Levingston Shipbuilding Co Offshore oil and gas well drilling rig
FR2172044A1 (fr) * 1972-02-17 1973-09-28 Cadillon Roger
FR2200088A1 (fr) * 1972-09-26 1974-04-19 Kaltenbach Werner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103303816A (zh) * 2013-07-01 2013-09-18 张家港市天运建筑机械有限公司 塔机的套架滚轮组件
CN103303816B (zh) * 2013-07-01 2015-11-18 张家港市天运建筑机械有限公司 塔机的套架滚轮组件
CN106081958A (zh) * 2016-07-26 2016-11-09 潘燕 一种塔式起重机在线监测系统
CN106081911A (zh) * 2016-08-29 2016-11-09 孟玲 一种塔式起重机在线监测系统
CN107673246A (zh) * 2017-11-14 2018-02-09 中建三局第建设工程有限责任公司 一种内爬塔吊限位导向装置

Also Published As

Publication number Publication date
IT8431619V0 (it) 1984-06-13

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