EP0621223A2 - Sicherheitsvorrichtung gegen Fallen - Google Patents

Sicherheitsvorrichtung gegen Fallen Download PDF

Info

Publication number
EP0621223A2
EP0621223A2 EP94105757A EP94105757A EP0621223A2 EP 0621223 A2 EP0621223 A2 EP 0621223A2 EP 94105757 A EP94105757 A EP 94105757A EP 94105757 A EP94105757 A EP 94105757A EP 0621223 A2 EP0621223 A2 EP 0621223A2
Authority
EP
European Patent Office
Prior art keywords
carriage
guides
sustaining members
series
cable
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Withdrawn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
EP94105757A
Other languages
English (en)
French (fr)
Other versions
EP0621223A3 (de
Inventor
Davide Trevisani
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.)
Soilmec SpA
Original Assignee
Soilmec SpA
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 Soilmec SpA filed Critical Soilmec SpA
Publication of EP0621223A2 publication Critical patent/EP0621223A2/de
Publication of EP0621223A3 publication Critical patent/EP0621223A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
    • B66B5/20—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of rotatable eccentrically-mounted members

Definitions

  • the present invention pertains to the field of civil or mining engineering works where several kinds of machines are used for soil consolidation, drilling, foundation construction, and the like. More in particular, the present invention refers to an anti-fall safety device for mounting on machines having heavy loads slidably suspended on non-horizontal guides. Should one of the sustaining members break, the load is likely to collapse causing serious damage to people and/or outfits.
  • None of the known commercial apparatuses provide carriage sustaining means disposed in parallel, i.e. acting simultaneously, nor safety devices capable of being operated locking the carriage on the tower in case one of the load sustaining members should break.
  • numeral 1 indicates overall a conventional carriage suspended by a sustaining cable 2 and provided with rollers 9 for facilitating movement along vertical guide 3.
  • Vertical guide 3 forms part of a tower (not shown) of a soil consolidation or drilling apparatus.
  • Carriage 1 has the task of supporting special drilling or soil consolidation outfits of the apparatus.
  • said outfits are not described hereinafter as being well known to prior art.
  • the outfits are always very heavy mechanical assemblies to which further units and implements such as tools are attached.
  • a bank of drilling rods may be attached to a carriage as illustrated of a drilling tower, the overall weight reached by the carriage/rod bank unit being of several tons.
  • the sustaining cable 2 is securely attached at 20 to the upper end of a piston 11 for maintaining the cable continuously stretched.
  • the lower end of the piston is pivotally attached to a tension rod 4 that is inserted in a hole 21 ( Figure 3) obtained in a horizontal floating plate 6.
  • Plate 6 is vertically slidable relative to the tension rod 4 and carriage 1. In normal working conditions, as shown in Figures 2 and 3, plate 6 is kept steadily at its upper end of stroke, against an abutment 22 integral with carriage 1.
  • a screw nut 7 is tightened against the lower face of plate 6, therefore providing safe support of the carriage and its implements to the cable 2.
  • a rigid housing 13 is fixed to the upper portion of carriage 1.
  • the rigid housing 13 contains a plurality of springs 5 biasing the upper face of plate 6.
  • the thrust given by the springs is anyway inferior to the weight of carriage 1 taken alone, so that the floating plate 6 can not be lowered unless a breaking occurs in one of the supporting elements occurs, as specified more in detail hereafter.
  • the front of plate 6 is fitted with a pair of opposite outwardly projecting side pins 10 aligned on a common horizontal axis.
  • a pair of respective cams 8 are pivotally engaged with a certain slack on pins 10.
  • the back ends 8a of cams 8 are grazing the surface of the guide 3 in normal operational conditions.
  • the cams 8 are centrally hinged and supported by respective horizontal and aligned pins 12, which are supported by couples of bearing ears 23 integral with the carriage 1.
  • the operation of the device according to the invention is as follows: as long as the tensile force with which screw nut 7 holds the plate 6 at its upper end of stroke prevails on the thrust of springs 5, the anti-fall safety device is not operated. As soon as this condition no longer persists, due to a breaking occurring in the cable 2 or any other member (the piston 11, tension rod 4, screw nut 7) sustaining the weight of the carriage and its attached implements, the springs 5 cause the plate 6 to lower immediately. Consequently. plate 6 pulls the screw nut and the other unloaded supporting members with it. The pins 10, being pulled downward, rotate cams 8 about their hinges 12 causing cam back portions 8a to engage the guides 3 and stopping the fall of the carriage 1 in the position it had at the breaking instant.
  • a second embodiment of the device according to the invention provides the sustaining cable 2 forming a closed ring round pulleys 25, 26 located at the upper and lower end portions of guide 3, respectively.
  • One end of the cable 2 is secured to a hooking seat 27 located on the bottom part of carriage 1.
  • the cable 2 is wound around a winch 28 mounted to the back side of the guides, whereby rotation of the winch in either way causes the carriage to move up or down.
  • cable tension is constantly provided by the piston assembly 11.
  • the embodiment of Figure 4 is ideal for application on machines having tiltable towers for working in sub-horizontal or inclined directions.
  • the stretched cable 2 holds the carriage down from the bottom and prevents the springs 5 from releasing untimely when inclination of the guides produces a lengthwise component of the weight of the carriage (supported by the cable) inferior to the thrust of compressed springs 5.
  • FIG. 1 to 4 The safety device shown in Figures 1 to 4 is composed by purely mechanical parts.
  • Figure 5 shows an alternative embodiment of the present invention in which also electrical and hydraulic components are employed.
  • the springs 5 bias a lower floating plate 17 downward.
  • a switch 15, located inside housing 13 and connected to plate 17 causes an electric valve 14 to open via a suitable electric circuit 24 schematically indicated in Figure 5.
  • the anti-fall device comprises respective locking cams 8 hinged in 16 to the carriage and similar to those disclosed with reference to Figure 2.
  • the locking cams of Figure 5 are operated by respective hydraulic spring piston assemblies 19, securely attached to the carriage and fitted with the electric valves 14.
  • cam 8 on the left in Figure 5 is shown in its passive or non-operating position grazing the surface of guide 3, while the cam on the right is illustrated in its active locking position, with its portion 8a engaging the guide.
  • cams 8 which are preferably toothed and made of a material that is harder than the one forming the guides 3. Moreover, in the locked position, the weight of the carriage further urges the cams on the guide, thereby further resisting falling.
  • a further variant (not shown) of the safety device according to the invention provides an accelerometer as the means for detecting a breaking in the sustaining members instead of the above discussed spring device.
  • the accelerometer is mounted to the carriage and connected to the electric valves that empty pistons 19 for operating them upon detecting a fall of the carriage.
  • the fall-detecting device is formed by an electric wire disposed parallel to the sustaining cable and connected to the electric valves 14. When a breaking occurs, also the electric wire breaks and automatically activates the electric valves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Earth Drilling (AREA)
EP94105757A 1993-04-23 1994-04-14 Sicherheitsvorrichtung gegen Fallen. Withdrawn EP0621223A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO930276 1993-04-23
IT93TO000276A IT1267662B1 (it) 1993-04-23 1993-04-23 Dispositivo di sicurezza anticaduta.

Publications (2)

Publication Number Publication Date
EP0621223A2 true EP0621223A2 (de) 1994-10-26
EP0621223A3 EP0621223A3 (de) 1995-11-02

Family

ID=11411427

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94105757A Withdrawn EP0621223A3 (de) 1993-04-23 1994-04-14 Sicherheitsvorrichtung gegen Fallen.

Country Status (2)

Country Link
EP (1) EP0621223A3 (de)
IT (1) IT1267662B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113820120A (zh) * 2021-11-22 2021-12-21 枣庄高新区立正安装工程有限公司 一种防坠器测试装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925151A (en) * 1954-07-26 1960-02-16 Clifford E Chandler Mine cage safety device
FR1584738A (de) * 1968-03-22 1970-01-02
GB1429181A (en) * 1972-01-31 1976-03-24 Ratcliff Tail Lifts Ltd Safety devices for vehicle tail lifts
GB2022055A (en) * 1978-05-31 1979-12-12 Ratcliff Tail Lifts Ltd Improvements in Safety Devices for Load Lifting and Lowering Apparatus
GB2088326A (en) * 1980-11-28 1982-06-09 Carrimore Sales Anthony Ltd Tailboard loaders for load carrying vehicles
JPH0539181A (ja) * 1991-07-31 1993-02-19 Hitachi Ltd エレベーターの索体緊張装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925151A (en) * 1954-07-26 1960-02-16 Clifford E Chandler Mine cage safety device
FR1584738A (de) * 1968-03-22 1970-01-02
GB1429181A (en) * 1972-01-31 1976-03-24 Ratcliff Tail Lifts Ltd Safety devices for vehicle tail lifts
GB2022055A (en) * 1978-05-31 1979-12-12 Ratcliff Tail Lifts Ltd Improvements in Safety Devices for Load Lifting and Lowering Apparatus
GB2088326A (en) * 1980-11-28 1982-06-09 Carrimore Sales Anthony Ltd Tailboard loaders for load carrying vehicles
JPH0539181A (ja) * 1991-07-31 1993-02-19 Hitachi Ltd エレベーターの索体緊張装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 17 no. 330 (M-1434) ,23 June 1993 & JP-A-05 039181 (HITACHI LTD) 19 February 1993, *
THE POST OFFICE ELECTRICAL ENGINEERS JOURNAL, January 1966 page 228 P.E. MARRIOTT 'Passenger Lifts in the Post Office Tower, London' *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113820120A (zh) * 2021-11-22 2021-12-21 枣庄高新区立正安装工程有限公司 一种防坠器测试装置
CN113820120B (zh) * 2021-11-22 2022-02-22 枣庄高新区立正安装工程有限公司 一种防坠器测试装置

Also Published As

Publication number Publication date
ITTO930276A1 (it) 1994-10-23
EP0621223A3 (de) 1995-11-02
ITTO930276A0 (it) 1993-04-23
IT1267662B1 (it) 1997-02-07

Similar Documents

Publication Publication Date Title
CN109996927B (zh) 防止人员坠落的保护装置
US4852842A (en) Appliance support apparatus
AU687838B2 (en) Apparatus and method
US20110095247A1 (en) Locking assembly for lifting apparatus
CN106365014A (zh) 电梯补偿绳涨紧轮限制机构、电梯补偿装置及电梯系统
CN105050933A (zh) 用于缆线的过载保护装置
WO2006082460A1 (en) A fall prevention device aimed at preventing an elevator counterweight to fall if its suspension elements break and elevator counterweight equipped therewith
CA2963799C (en) Support and guiding apparatus for feeder lines for excavation devices
EP0621223A2 (de) Sicherheitsvorrichtung gegen Fallen
US4173268A (en) Hoist mechanism
US4762203A (en) Lift truck lowering system
JP2001139280A (ja) 建設機械の過負荷防止装置
CN102384207B (zh) 工程机械及其运动缓冲装置以及设有该装置的臂式斗轮机
US5775845A (en) Passive riser tensioner
CN106956369A (zh) 绳锯机
CN1547549A (zh) 从轿厢顶部维修升降机系统的安全保护装置
EP1457453A1 (de) Einrichtung zur Überwachung von Seilen eines Aufzuges
CN109562913B (zh) 带有电梯系统的风力涡轮机
US5362029A (en) Lift limit device for a load lifting mechanism
DE202015005760U1 (de) Vorrichtung, Anordnung und deckengebundenen Röntgenbildgebungsgerät mit einer Überwachung der Längsausdehnung eines Tragseils
EP3545163B1 (de) System zum schutz vor windenüberlastung
US5066059A (en) Drill string compensator with improved transloaders
DE3915304C2 (de)
DE2844970C2 (de)
CN214745829U (zh) 捞渣机张紧装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE

17P Request for examination filed

Effective date: 19960429

17Q First examination report despatched

Effective date: 19981020

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19990302