US3797608A - Scaffolding winch - Google Patents

Scaffolding winch Download PDF

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Publication number
US3797608A
US3797608A US00236922A US3797608DA US3797608A US 3797608 A US3797608 A US 3797608A US 00236922 A US00236922 A US 00236922A US 3797608D A US3797608D A US 3797608DA US 3797608 A US3797608 A US 3797608A
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US
United States
Prior art keywords
cable
state
articulated lever
platform
locking means
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
US00236922A
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English (en)
Inventor
J Virdis
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.)
Poma SA
Original Assignee
Pomagalski 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 Pomagalski SA filed Critical Pomagalski SA
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Publication of US3797608A publication Critical patent/US3797608A/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
    • E04G3/30—Mobile scaffolds; Scaffolds with mobile platforms suspended by flexible supporting elements, e.g. cables
    • E04G3/32—Hoisting devices; Safety devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/16—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes for action on ropes or cables

Definitions

  • ABSTRACT [30] Foreign Application Priority Data Mar 26 1971 Switzerland 4524/71
  • the invention relates to an apparatus for raising and lowering a scaffolding platform along a support cable 52 us. (:1. 182/112 and a safety-cable-
  • the safety Cable gripping means [51] Int. Cl. E04g 3/10 enters automatically into action when the Support [58] Field of Search 182/1 i 143 cable become slack and an articulated lever for press- 254/l67: 188765 65.3 ing the cable in a grooved pulley rotates into an inac- 6 I tive state.
  • the invention relates to an apparatus for the raising and the lowering of a gangway or a scaffolding platform comprising at least a winch secured to the platform and adapted to co-operate with a support cable and locking means capable of gripping a safety cable to stop the descent and hold the said platform.
  • the US. Pat. No. 3,586,125 discloses such an apparatus wherein the unlocking control means are so coupled to the winch motor control means for lowering the platform that the safety system is activated to lock or unlock only when the motor is stopped (as far as lowering of the platform is concerned) and cannot therefore intervene and lock as long as the operator activates the motor to lower the platform. It will be appreciated that if, due to some malfunction, the support cable should become slack, for instance by breaking of the cable, the safety system could enter into action to hold the platform only after releasing of-the motor control means by the operator. Such a time lag is dangerous.
  • An object of the present invention is to provide an apparatus for raisingand lowering a scaffolding platform whereby perfect safety may be ensured in operation and any possibility of a false manoeuvre prevented.
  • the safety system is activated directly and only when the support cable slackens by means of an articulated lever, known per se, having a cable engaging roller and compression means to press the cable in a grooved pulley.
  • Another object of the invention is to provide a winch apparatus with a safety system, wherein the raising and lowering are controlled by the actuation of the drive means of said winch particularly of a winch motor.
  • a further object of the invention is to provide an apparatus wherein the perfect working of the safety device can be easily checked.
  • Still another object is to provide an apparatus which may be driven by any type of drive means such as electrical, pneumatical, combustion motors, manual drive means, several drive means working even separately or together.
  • drive means such as electrical, pneumatical, combustion motors, manual drive means, several drive means working even separately or together.
  • a further object of the invention is to provide an apparatus with a locking device activated by additional safety devices,for instance when the platform cants.
  • FIG. 1 is a view in elevation of a winch according to the invention
  • FIG. 2 is a section along line II-II of FIG. 1.
  • a support cable fastened at a fixed point is lodged in the V-shaped groove of a hauling pulley 12 which it embraces over part of its circumference.
  • the hauling pulley 12 and the articulated lever 16 are secured to a frame having a plate 20 and the pulley 12 is driven in rotation manually or by any motor (not shown).
  • the motor can be electrical, pneumatical, a combustion engine and operates for instance a shaft 22, in either direction, on which pulley 12 is keyed.
  • a compression spring 24 located between an abutment 26 of frame 20 and a face 28 of the articulated lever 16 bias the latter towards a second state in a direction shown by arrow F on FIG. 1. In said second state of the articulated lever 16 the compression wheel 14 is drawn out of the groove of pulley 12.
  • the stress in cable 10 maintains the articulated lever 16 in the first state shown on FIG. 1 against the spring action 24.
  • a winch of this type is described in US. Pat. No. 3,5 l6,642.
  • a locking device of a safety system 32 To the other side of plate 20 is secured a locking device of a safety system 32.
  • the safety system-32 cooperates with a safety cable 34 fastened to a fixed point preferably different of the fastening point of cable 10.
  • the safety cable 34 passes between two jaws 36, 38 of safety system 32 which are capable of grip and clamp the calbe 34.
  • Jaw 38 in the form of a U enclosing cable 34 and jaw 36, is articulated at 40, 40' on two locking rods 42, 42, the opposite end of each rod being fitted so as to pivot on a fixed axle 44, 44' of frame 20 of the winch.
  • the ends of the locking rods 42, 42 articulated respectively at 40, 40' are in the form of a cam or an eccentric 46, 46' coacting with jaw 36 in such a manner that a limited movement upwards of jaws 36, 38 in the direction of arrow F on the drawings results in a limited pivoting of rods 42, 42' in the trigonometric direction (arrow F,) and therefore in a closing of jaws 36, 38.
  • a movement downwards in the opposite direction provokes the opening of jaws 36, 38.
  • the safety device 32 is during normal operation of the apparatus maintained in a first state, in a downward inactive position by aspring (not shown) or by its weight. In this first state the jaws 36, 38 are opened and allow free passage of cable 34 in both directions.
  • a circular opening 48 is provided in plate 20 and a finger 50 fitted to the articulated lever 16 passes through the opening 43.
  • the finger 50 is for instance an extension of the shaft of the roller 18 and it protrudes on the face of plate 20 with the safety system 32 so as to coact with the latter when the support cable 10 slackens and when the articulated lever 16 is rotated on axle 30 in the direction of arrow F by spring 24.
  • the finger 50 draws upwards the jaws 36, 38 and pivots the whole safety system on axles 44, 44 of locking rods 42, 42' to close the jaws 36, 38 and to clamp the safety cable 34. It is easily understood that the slightest relative movement of cable 34 in the direction of arrow F, in relation to frame 20 tends to increase the clamping of the cable 34. By breaking of the support cable 10 the platform is automatically supported by the safety cable 34.
  • the apparatus functions in the following manner
  • the frame 20 is secured,for instance by axle 52, to a scaffolding platform (not shown) and the winch hauls the platform along the support cable 10.
  • the articulated lever 16 is maintained in the first state to press the cable 10 in the groove of pulley 12 by the stress in cable 10.
  • the finger 50 of lever 16 passing through the opening 48 stands back from the safety system 32 which is in the first state shown in FIG. 1.
  • the raising and lowering are allowed, the safety system remaining in its inactive position.
  • the safety system 32 works instantaneously when the cable slackens and a perfect safety is ensured as the slightest movement of the safety device 32 brings the jaws 36, 38 against the cable 34 and the friction between the jaws and the cable provokes the self locking on the cable.
  • the perfect working of the safety device can be checked by raising upwards the jaws 36, 38 in the direction of arrow F for instance by shifting upwards a control finger 54 secured to jaw 38.
  • the control finger 54 may be actuated by additional safety means particularlya cant detecting device of the platform, which could include a control rod (not shown) inserted between finger 54 and the platform and laterally shifted with respect to the support cable 10 so as to actuate the finger 54 if the platform cants.
  • the winch and the associated safety system are very simple and the safety system locks the platform when the support cable slackens, by breaking of the support cable or its fastening or by some malfunction of the drive means particularly by unkeying of pulley 12.
  • a plurality of winches can be used to support a platform, the control of all winches being performed from a single post in a very simple manner as the working of the safety system is automatical.
  • Apparatus for raising and lowering a scaffolding platform and adapted to be secured to such a platform said apparatus including a winch having a grooved pulley, a support cable lodged in the grooved pulley, an articulated lever with cable engaging means adapted to co-operate with the support cable so as to maintain said articulated lever in a first state when the cable is taut and in a second state when the cable is slack, compression means secured to said articulated lever adapted to press the support cable in the grooved pulley in said first state of the articulated lever, a safety cable, locking means adapted to co-operate with said safety cable passing therethrough and arranged in a first state of the locking means to allow passage of the cable cooperating therewith and in a second state to prevent such a passage, coupling means to couple said articulated lever and said locking means in such a manner that the locking means is moved in said second state when the articulated lever is moved in said second state.
  • said locking means comprises a brake device with jaws capable of gripping a cable passing therebetween and two articulated rods with one end coacting with the said jaws to induce their closing or opening when pivoted.
  • An apparatus comprising a frame with a plate arranged to support on one side of said plate said grooved pulley and said articulated 1ever, and on the other side said locking means, said plate having an opening and said coupling means passing through the opening to couple said articulated lever and said locking means.
  • said articulated lever comprises a finger extending horizon tally through said opening and beneath said jaws and arranged so as to move said jaws upwards in a closing state when said articulated lever is moved in said second state.
  • An installation including a scaffolding platform, an apparatus according to claim 6 secured to said platform a detector arranged on said platform so as to detect the cant of the platform and to operate said additional control means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Jib Cranes (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
US00236922A 1971-03-26 1972-03-22 Scaffolding winch Expired - Lifetime US3797608A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH452471A CH529060A (fr) 1971-03-26 1971-03-26 Treuil d'échafaudage

Publications (1)

Publication Number Publication Date
US3797608A true US3797608A (en) 1974-03-19

Family

ID=4277691

Family Applications (1)

Application Number Title Priority Date Filing Date
US00236922A Expired - Lifetime US3797608A (en) 1971-03-26 1972-03-22 Scaffolding winch

Country Status (9)

Country Link
US (1) US3797608A (enrdf_load_stackoverflow)
AT (1) AT317484B (enrdf_load_stackoverflow)
CA (1) CA955920A (enrdf_load_stackoverflow)
CH (1) CH529060A (enrdf_load_stackoverflow)
DE (1) DE2214009A1 (enrdf_load_stackoverflow)
FR (1) FR2130634B1 (enrdf_load_stackoverflow)
GB (1) GB1375622A (enrdf_load_stackoverflow)
IT (1) IT958719B (enrdf_load_stackoverflow)
NL (1) NL7204030A (enrdf_load_stackoverflow)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034828A (en) * 1975-04-14 1977-07-12 Rose Manufacturing Company Shock absorbing cable connector
DE2835294A1 (de) * 1977-08-17 1979-02-22 Nippon Biso Kk Seilzugvorrichtung
US4225012A (en) * 1979-04-06 1980-09-30 International Telephone And Telegraph Corporation Safety clamp device and apparatus utilizing same
US4237999A (en) * 1978-06-09 1980-12-09 Tractel, S.A. Automatic anti-tilt device for scaffoldings
US4462484A (en) * 1981-09-03 1984-07-31 Platforms And Power, Inc. Tension sensing device
US20060070809A1 (en) * 2004-09-30 2006-04-06 Yoav Barzilai Advanced "Omer" rescue system
CN102493637A (zh) * 2011-12-08 2012-06-13 中冶建工集团有限公司 脚手架防坠楔块的预紧保护联动装置
CN102733590A (zh) * 2012-06-26 2012-10-17 杨政 附着升降脚手架提升机构
US20130056303A1 (en) * 2010-03-30 2013-03-07 Uwe Bergmann Rappelling Device
CN103437541A (zh) * 2013-08-30 2013-12-11 中国能源建设集团山西省电力建设四公司 烟囱电动提升爬架的防坠装置
CN104120872A (zh) * 2014-08-05 2014-10-29 山西省宏图建设集团有限公司 新型抱锁装置
CN104481131A (zh) * 2014-12-17 2015-04-01 内蒙古巨华集团大华建筑安装有限公司 单向上升防坠器
CN104627894A (zh) * 2015-01-09 2015-05-20 刘秀英 电梯坠落保护器
CN104790646A (zh) * 2015-03-27 2015-07-22 日照昊卓机电科技有限公司 脚手架多点均衡承载动力装置及方法
CN105715034A (zh) * 2016-02-05 2016-06-29 河北科技大学 一种升降脚手架用防坠装置
US9790064B2 (en) * 2013-10-28 2017-10-17 Capital Access S.A. Autonomous winch with grip pulley
US20180200542A1 (en) * 2015-07-10 2018-07-19 Xsplatforms B.V. Descending device for persons from a building
US10850956B1 (en) * 2015-06-10 2020-12-01 Bryant William Bertrand Hand held device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263681A (en) * 1992-01-28 1993-08-04 Doei Gaiso Yugen Gaisha Working gondala.
BRPI0903209A2 (pt) * 2009-08-27 2011-05-10 Rodrigo Prado Pigini sistema de movimentaÇço de carga de duplo cabeamento
CN101832021B (zh) * 2010-02-11 2011-07-20 中冶实久建设有限公司 水塔及烟囱滑模施工中垂直运输的安全设施
CN101870437B (zh) * 2010-05-19 2013-03-13 广州四航岩土技术工程有限公司 电动攀登器及其应用设备
WO2015061863A1 (pt) * 2013-11-01 2015-05-07 Lopes Moreira Alberto Emilio Balancim quádruplo e estrutura para arranjo de sistema de elevação em fachadas prediais

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021918A (en) * 1958-07-05 1962-02-20 Medawar Andre Antoine Safety devices for lifting appliances
US3516642A (en) * 1966-12-28 1970-06-23 Pomagalski Jean Sa Hoist
US3586125A (en) * 1969-04-23 1971-06-22 Pomagalski Jean Sa Scaffolding winch with motor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3262520A (en) * 1964-09-17 1966-07-26 Frederick H Bond Trackless hoist with safety stop
FR1580173A (enrdf_load_stackoverflow) * 1968-03-07 1969-09-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021918A (en) * 1958-07-05 1962-02-20 Medawar Andre Antoine Safety devices for lifting appliances
US3516642A (en) * 1966-12-28 1970-06-23 Pomagalski Jean Sa Hoist
US3586125A (en) * 1969-04-23 1971-06-22 Pomagalski Jean Sa Scaffolding winch with motor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4034828A (en) * 1975-04-14 1977-07-12 Rose Manufacturing Company Shock absorbing cable connector
DE2835294A1 (de) * 1977-08-17 1979-02-22 Nippon Biso Kk Seilzugvorrichtung
DE2835294B2 (de) * 1977-08-17 1980-08-07 Nihon Biso K.K., Tokio Seilzugvorrichtung
DE2835294C3 (de) * 1977-08-17 1981-06-25 Nihon Biso K.K., Tokyo Seilzugvorrichtung
US4237999A (en) * 1978-06-09 1980-12-09 Tractel, S.A. Automatic anti-tilt device for scaffoldings
US4225012A (en) * 1979-04-06 1980-09-30 International Telephone And Telegraph Corporation Safety clamp device and apparatus utilizing same
US4462484A (en) * 1981-09-03 1984-07-31 Platforms And Power, Inc. Tension sensing device
US20060070809A1 (en) * 2004-09-30 2006-04-06 Yoav Barzilai Advanced "Omer" rescue system
US20080149433A1 (en) * 2004-09-30 2008-06-26 Yoav Barzilai Advanced "omer" rescue system
US20130056303A1 (en) * 2010-03-30 2013-03-07 Uwe Bergmann Rappelling Device
US9186527B2 (en) * 2010-03-30 2015-11-17 Uwe Bergmann Rappelling device
CN102493637A (zh) * 2011-12-08 2012-06-13 中冶建工集团有限公司 脚手架防坠楔块的预紧保护联动装置
CN102493637B (zh) * 2011-12-08 2014-04-02 中冶建工集团有限公司 脚手架防坠楔块的预紧保护联动装置
CN102733590A (zh) * 2012-06-26 2012-10-17 杨政 附着升降脚手架提升机构
CN103437541A (zh) * 2013-08-30 2013-12-11 中国能源建设集团山西省电力建设四公司 烟囱电动提升爬架的防坠装置
US9790064B2 (en) * 2013-10-28 2017-10-17 Capital Access S.A. Autonomous winch with grip pulley
CN104120872A (zh) * 2014-08-05 2014-10-29 山西省宏图建设集团有限公司 新型抱锁装置
CN104481131A (zh) * 2014-12-17 2015-04-01 内蒙古巨华集团大华建筑安装有限公司 单向上升防坠器
CN104627894A (zh) * 2015-01-09 2015-05-20 刘秀英 电梯坠落保护器
CN104790646A (zh) * 2015-03-27 2015-07-22 日照昊卓机电科技有限公司 脚手架多点均衡承载动力装置及方法
US10850956B1 (en) * 2015-06-10 2020-12-01 Bryant William Bertrand Hand held device
US20180200542A1 (en) * 2015-07-10 2018-07-19 Xsplatforms B.V. Descending device for persons from a building
CN105715034A (zh) * 2016-02-05 2016-06-29 河北科技大学 一种升降脚手架用防坠装置

Also Published As

Publication number Publication date
NL7204030A (enrdf_load_stackoverflow) 1972-09-28
CH529060A (fr) 1972-10-15
DE2214009A1 (de) 1972-10-05
FR2130634A1 (enrdf_load_stackoverflow) 1972-11-03
IT958719B (it) 1973-10-30
AT317484B (de) 1974-08-26
GB1375622A (enrdf_load_stackoverflow) 1974-11-27
CA955920A (en) 1974-10-08
FR2130634B1 (enrdf_load_stackoverflow) 1975-10-24

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