EP0300892A1 - Sicherheitsvorrichtung für die Winde einer hängenden Arbeitsbühne - Google Patents

Sicherheitsvorrichtung für die Winde einer hängenden Arbeitsbühne Download PDF

Info

Publication number
EP0300892A1
EP0300892A1 EP88401861A EP88401861A EP0300892A1 EP 0300892 A1 EP0300892 A1 EP 0300892A1 EP 88401861 A EP88401861 A EP 88401861A EP 88401861 A EP88401861 A EP 88401861A EP 0300892 A1 EP0300892 A1 EP 0300892A1
Authority
EP
European Patent Office
Prior art keywords
switch
winches
winch
nacelle
lever
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
EP88401861A
Other languages
English (en)
French (fr)
Other versions
EP0300892B1 (de
Inventor
Michel Cavalieri
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 EP0300892A1 publication Critical patent/EP0300892A1/de
Application granted granted Critical
Publication of EP0300892B1 publication Critical patent/EP0300892B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load
    • 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
    • B66D1/54—Safety gear
    • 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
    • B66D1/605—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes scaffolding winshes
    • 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
    • B66D1/7489—Capstans having a particular use, e.g. rope ascenders

Definitions

  • the present invention relates to a safety assembly for motorized flying scaffolding using two electric winches, each of which is powered by a control circuit, which scaffolding comprises a gondola suspended with two legs mounted, directly or indirectly pivoting, respectively on each of said winches.
  • the nacelle is joined to a pair of winches which are controlled, either individually, which requires the presence of two operators or the alternative commissioning of the two winches, or simultaneously by means of a box. central electric to which the two winches are connected.
  • These scaffolds are provided with safety systems in the event that the nacelle takes, relative to the horizontal, a moderate or excessive inclination.
  • the present invention provides means automatically correcting the inclination of the nacelle when the latter remains below a predetermined threshold or causing the engines to stop when the inclination becomes excessive.
  • each tab carries a lug adapted to penetrate a slot provided in a pull tab to move to the left or to the right said pull tab according to the lack of horizontality of the nacelle, the movement of said pull tab being capable of bring into contact with a switch interposed in said control circuit by causing it to open.
  • the pull tab has three projections through which it is likely to come into contact with a first, a second or a third switch interposed in the control circuit of the winch motor, causing it to open.
  • the opening of the first switch (excess tilt sive of the nacelle) causes the engines of the two winches to stop completely, while the opening of the second or third switch (moderate inclination of the nacelle) interrupts the operation of the engine of that of the winches on the highest side , uphill, or on the lowest side, downhill.
  • the second and third switches close again as soon as the cause that caused their opening ceases.
  • motorized flying scaffolding In addition to the safety systems acting in the event of moderate or excessive inclination of the nacelle, motorized flying scaffolding must necessarily be equipped with safety means to detect an overload of the nacelle, or on the contrary a load lower than normal. This latter situation can occur when the basket, downhill, touches the ground or hangs an obstacle, for example a balcony.
  • overload detection is obtained: - either by measuring the electric current, - Either by means implementing the compression of a spring (load cell).
  • the measurement of the electric intensity is not very precise because the intensity varies with the network voltage and, in the specific case of flying scaffolding, the winches are powered by long lengths of electric wires, source of voltage drop.
  • the weighing system it is certainly economical and easily adjustable, but it tends to give a pianotage effect.
  • the present invention provides a safety assembly which is simple and reliable in construction and which employs means common to both types of detection.
  • each suspension lug of the nacelle is articulated on a lever capable of acting on two electrical contacts away from which it is kept by elastic means suitably calibrated as long as the force F, at which is subject to said tab, is less than a first threshold S1 and greater than a second threshold S2, the passage of the force F to a value greater than S1 (overload) causing a first element of said lever to act on, and open, the first aforementioned switch, and the passage of the force F to a value less than S2 (underload) causing a second element of said lever to act on, and open, a fourth switch interposed in the supply circuit of each winch.
  • lever means both a simple lever and a set of articulated levers.
  • a pivot point capable of occupying two stable positions defined by two stops, the first position being imposed on it by the force F ′ transmitted to it the lever from the lug when this force is greater than the tare of the elastic underload means and the second position being imposed on it by said elastic means when said force F ′ is less than said tare.
  • opening the first switch causes the motors to stop completely. This is what happens in the event of an overload.
  • the opening of the fourth switch only causes the motors to stop in the lowering direction, since the system must be able to allow the nacelle to rise to release it, for example from the obstacle to which she clung.
  • the fourth switch closes as soon as the cause which caused its opening ceases.
  • the same first switch is used for two types of security: overload and excessive tilting of the platform.
  • the safety assembly according to the invention can be included in a box interposed between a conventional winch and the nacelle, or better be incorporated into the winch itself, and the invention naturally extends its scope to said winches.
  • a nacelle 1 suspended by two legs 2 to a pair of winches 3a-3b whose carrying cables are designated by the reference 4 and whose safety cables are designated by the reference 5.
  • the winches 3a and 3b are identical, but mounted inverted so that in FIG. 1, one of the faces of the winch is seen on side 3a and the opposite face on side 3b.
  • the winch 3a called “monitor winch”, is joined to the sector by the electric wire 6 and it feeds via wire 7 the winch 3b called “follower winch”.
  • the winch 3a is provided with a control cable 8a connected to an operating button box 8b.
  • the carrying cables 4 and the safety cables 5 are anchored to the upper lines and counterweights are fixed to the lower end of the cables.
  • the reference 9 designates the winch casing 3a or 3b.
  • the carrying cable 4 enters this casing 9 and is wound around an adhesion pulley 10, in a groove provided for this purpose, then leaves the casing 9.
  • the safety cable 5 also passes through the casing 9 but no did not represent it for the clarity of the drawings.
  • a roller 10a is mounted on a lever 11, a first end 11a of which is pivotally mounted in a hinge 12 and the other end of which 11b is subjected to the effect of a spring 13. Before the self-tightening effect presses the roller 10a on the cable 4, it is the spring 13 which forces the roller 10a to press the cable 4 into the groove of the adhesion pulley 10.
  • the nacelle 1 is suspended from the tab 2 by means of bolts penetrating into suitable holes 2a, 2b (FIG. 2).
  • the tab 2 is pivotally mounted at 14c and is joined to a set of articulated levers which will now be described in detail.
  • This set of levers comprises a first lever arm 14, one end of which 14a is held stationary by a spring 15 as long as the load applied to the tab 2 does not exceed a first predetermined threshold S1.
  • the other end 14b of the lever 14 is joined in 16d to a second lever 16, one end 16a of which is joined to the lever 11 by means of a connecting rod 25 and the other end of which 16b is held stationary by a spring 17 both that the load applied to the tab 2 remains greater than a second predetermined threshold S2.
  • the threshold S1 is set by a appropriate calibration of the spring 15 and the threshold S2 and adjusted by an appropriate calibration of the spring 17.
  • the points 14b and 16d could be confused in practice.
  • the point 16c of the lever 16 is capable of occupying two stable positions, in abutment at the bottom or at the top of the buttonhole 18 so that it offers, depending on the load applied to the tab 2, two pivoting positions for the lever 16 .
  • the set of levers further comprises a lever 20, one end 20a of which faces the end 14a of the lever 14 and the other end of which 20b faces the member of command to open a microswitch 21 interposed on the motor control circuit.
  • the lever 20 is pivotally mounted around a point 20c. Friction means, not shown, are provided to maintain the lever 20 in the pivoted open position of the microswitch 21 as long as it is not returned to the neutral position using the manual pusher 22.
  • a stop 37 limits movement under the effect of pusher 22.
  • pull tab 23 slidably mounted in a guide 24 consisting of two formations projecting from the housing 9.
  • the spring 17 and the buttonhole 18 are mounted on the guide 24.
  • the pull tab 23 has a slot or light 34 in which projects a lug 35 depending on the tab 2.
  • the pull tab 23 has three active projections 26, 27 and 28. These projections are capable of coming into contact with rollers 29, 30 and 31 acting respectively on the opening control device for switches 32, 33 and 21.
  • the tab 2 takes an inclination between the obliques 36a and 36b.
  • the displacement of the lug 35 is such that it does not push not on the ends of light 34, nothing happens.
  • the displacement of the lug 35 is greater, it displaces the zipper 23 to the right or to the left. If the zipper is moved to the right, the active point 26 of the zipper comes into contact with the roller 29 by opening the switch 32. If the zipper is moved to the left, the active point 27 of the zipper comes into contact with the roller 30 of the switch 33 which it causes to open.
  • the active point 28 of the pull tab 23 of one of the winches equipping the scaffolding will come into contact with the roller 31 which, thus being raised, will open the switch 21 by causing the engines of the two winches to stop completely.
  • the pull tab 23 is an "inert" member which remains in the position in which the lug 35 drives it, and that, given the stroke offered to the lug 35 by the light 34, the pull tab 23 does not follow the lug 35 only with a certain latency.
  • the safety assembly is included in a separate housing 38 which can be added to a conventional winch.
  • FIG. 3 the structure of the safety assembly is very similar to that of FIG. 2 and the same references designate the same parts. The only difference is that the levers 14 and 16 of FIG. 2 are merged into a single lever 39 in FIG. 3, that, consequently, the points 14b and 16d of FIG. 2 are merged into a single point 39a, and that this lever 39 is independent of the structure of the winch.
  • the pull tab could have a notch offering the same possibilities of lateral movement to the lug 35.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wind Motors (AREA)
  • Movable Scaffolding (AREA)
EP88401861A 1987-07-21 1988-07-19 Sicherheitsvorrichtung für die Winde einer hängenden Arbeitsbühne Expired - Lifetime EP0300892B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710276A FR2618421B1 (fr) 1987-07-21 1987-07-21 Ensemble de securite pour treuil d'echafaudage volant
FR8710276 1987-07-21

Publications (2)

Publication Number Publication Date
EP0300892A1 true EP0300892A1 (de) 1989-01-25
EP0300892B1 EP0300892B1 (de) 1991-05-02

Family

ID=9353352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88401861A Expired - Lifetime EP0300892B1 (de) 1987-07-21 1988-07-19 Sicherheitsvorrichtung für die Winde einer hängenden Arbeitsbühne

Country Status (4)

Country Link
US (1) US4821842A (de)
EP (1) EP0300892B1 (de)
DE (1) DE3862620D1 (de)
FR (1) FR2618421B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401099A1 (de) * 1989-05-29 1990-12-05 Tractel S.A. Gerät für den Antrieb eines Lastenträgerbandes mit einer kombinierten Vorrichtung zur Ablenkung der Last und Führung des Bandes
FR2746783A1 (fr) * 1996-03-27 1997-10-03 Fontanel Robert Support equilibreur de charges
EP1008550A1 (de) * 1998-12-10 2000-06-14 BMG Baugeräte und Maschinen GmbH Mechanische Anordnung zur Begrenzung der Bewegung von Arbeitsbühnen
FR2921165A1 (fr) * 2007-09-19 2009-03-20 Fixator Soc Par Actions Simpli Dispositif d'aide au maintien de l'orientation d'une plateforme et dispositif d'elevation associe
WO2013004663A1 (en) * 2011-07-04 2013-01-10 Tractel Greifzug Gmbh Endless cable winch

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2872841A1 (fr) * 2004-07-12 2006-01-13 Fixator Soc Par Actions Simpli Dispositif support de plate-forme pour l'elevation de charges ou de personnes le long d'un ouvrage
US7631730B2 (en) * 2005-11-04 2009-12-15 Sky Climber, Llc Powered controlled acceleration suspension work platform hoist system
US8944217B2 (en) 2005-11-04 2015-02-03 Sky Climber, Llc Suspension work platform hoist system with communication system
US8403112B2 (en) 2005-11-04 2013-03-26 Sky Climber Llc Hoist system with high system power factor
DE102006003832B4 (de) * 2006-01-26 2008-10-16 Bubenzer Bremsen Gerhard Bubenzer Ing. Gmbh Steuer- und Regelanordnung zur Sicherung einer Fördereinrichtung, Fördereinrichtung und Krananlage
GB2481595A (en) * 2010-06-29 2012-01-04 Shepherd Engineering Services Ltd System and method for positioning a first structure relative to a second structure.
US9932212B2 (en) 2014-11-06 2018-04-03 Ramsey Winch Company Mechanical overload sensor system
US11535492B2 (en) * 2019-01-10 2022-12-27 Safeworks, Llc Overspeed safety mechanism for lift car
US11427437B2 (en) * 2019-01-10 2022-08-30 Safeworks, Llc Overspeed safely brake

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586125A (en) * 1969-04-23 1971-06-22 Pomagalski Jean Sa Scaffolding winch with motor
BE838434A (nl) * 1976-02-11 1976-05-28 Beveiligingsinrichting voor hangbruggen en dergelijke
DE2634116A1 (de) * 1975-07-30 1977-02-17 Europ Levage Manutention Automatische fangvorrichtung fuer motorbetriebene hebezeuge
DE2732516A1 (de) * 1977-07-19 1979-02-01 Mannesmann Ag Einrichtung zur sicherung, insbesondere einer arbeitsbuehne fuer gebaeudefassaden
FR2427997A1 (fr) * 1978-06-09 1980-01-04 Tractel Sa Dispositif automatique d'intervention destine a arreter le mouvement d'inclinaison d'une nacelle suspendue a deux ou plusieurs treuils
GB2110632A (en) * 1979-06-01 1983-06-22 Tractel Sa Cable traction or hoisting apparatus
US4462484A (en) * 1981-09-03 1984-07-31 Platforms And Power, Inc. Tension sensing device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710442A (en) * 1927-04-27 1929-04-23 Shepard Co Lewis Four-post hoisting machine
SU626187A1 (ru) * 1977-04-25 1978-09-30 Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" Люлька

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3586125A (en) * 1969-04-23 1971-06-22 Pomagalski Jean Sa Scaffolding winch with motor
DE2634116A1 (de) * 1975-07-30 1977-02-17 Europ Levage Manutention Automatische fangvorrichtung fuer motorbetriebene hebezeuge
BE838434A (nl) * 1976-02-11 1976-05-28 Beveiligingsinrichting voor hangbruggen en dergelijke
DE2732516A1 (de) * 1977-07-19 1979-02-01 Mannesmann Ag Einrichtung zur sicherung, insbesondere einer arbeitsbuehne fuer gebaeudefassaden
FR2427997A1 (fr) * 1978-06-09 1980-01-04 Tractel Sa Dispositif automatique d'intervention destine a arreter le mouvement d'inclinaison d'une nacelle suspendue a deux ou plusieurs treuils
GB2110632A (en) * 1979-06-01 1983-06-22 Tractel Sa Cable traction or hoisting apparatus
US4462484A (en) * 1981-09-03 1984-07-31 Platforms And Power, Inc. Tension sensing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401099A1 (de) * 1989-05-29 1990-12-05 Tractel S.A. Gerät für den Antrieb eines Lastenträgerbandes mit einer kombinierten Vorrichtung zur Ablenkung der Last und Führung des Bandes
FR2746783A1 (fr) * 1996-03-27 1997-10-03 Fontanel Robert Support equilibreur de charges
EP1008550A1 (de) * 1998-12-10 2000-06-14 BMG Baugeräte und Maschinen GmbH Mechanische Anordnung zur Begrenzung der Bewegung von Arbeitsbühnen
FR2921165A1 (fr) * 2007-09-19 2009-03-20 Fixator Soc Par Actions Simpli Dispositif d'aide au maintien de l'orientation d'une plateforme et dispositif d'elevation associe
EP2040138A1 (de) 2007-09-19 2009-03-25 Fixator Hilfsvorrichtung zur Aufrechterhaltung der Ausrichtung einer Plattform und entsprechende Hebevorrichtung
WO2013004663A1 (en) * 2011-07-04 2013-01-10 Tractel Greifzug Gmbh Endless cable winch
US9422140B2 (en) 2011-07-04 2016-08-23 Tractel Greifzug Gmbh Endless cable winch with overload protection

Also Published As

Publication number Publication date
DE3862620D1 (de) 1991-06-06
FR2618421A1 (fr) 1989-01-27
FR2618421B1 (fr) 1990-01-05
US4821842A (en) 1989-04-18
EP0300892B1 (de) 1991-05-02

Similar Documents

Publication Publication Date Title
EP0300892B1 (de) Sicherheitsvorrichtung für die Winde einer hängenden Arbeitsbühne
EP0789380B1 (de) Betätigungsmechanismus für einen Lastschalter mit durch einen kurzschlussentkuppelbare Verriegelung
EP0688581A1 (de) Entkuppelbares selbstblockierendes Abseilgerät
EP0299899A1 (de) Vorrichtung zum Verriegeln und Entriegeln von Notausgängen
CH634798A5 (fr) Dispositif automatique d'intervention destine a arreter le mouvement d'inclinaison d'une nacelle suspendue a deux ou plusieurs treuils.
FR2693535A1 (fr) Dispositif de sécurité pour lève-vitre électriques de véhicule à câble.
FR2554102A1 (fr) Dispositif autobloquant mixte de descente et de remontee le long d'une corde verticale
EP1404605B1 (de) Verriegelungsvorrichtung für schachttür mit unabhängiger notentriegelungsvorrichtung
FR2693569A1 (fr) Dispositif de sécurité pour lève-vitre électriques de véhicule du type à câble coulissant le long d'un rail de guidage.
CH432379A (fr) Aiguillage pour transporteur à chariots tractés
FR2536707A1 (fr) Dispositif de descente automatique rapide pour pantographe
CH620644A5 (de)
FR2591645A1 (fr) Mecanisme d'ouverture et de fermeture d'issue de secours
WO2006000882A1 (fr) Porte rapide a fonctionnement securise
EP0081212A1 (de) Sicherheitsvorrichtung für Personen- oder Lastenaufzug
EP0582528B1 (de) Kontrolle der Klemmwirkung einer Kuppelklemme einer Seilbahn
FR2525906A1 (fr) Serre-cable de securite pour proteger les personnes contre les risques de chute
EP1222893A2 (de) Anordnung und Vorrichtung zum Bewegen eines schweren Teils
FR2808855A1 (fr) Tendeur de courroie a securite integree contre la rupture et la detente de la courroie, et appareil de radiologie equipe d'un tel tendeur de courroie
FR2805511A1 (fr) Vehicule de neige a conduite securisee
FR2682420A1 (fr) Dispositif de declenchement pour volet de desemfumage.
FR2661405A1 (fr) Dispositif de declenchement de parachute pour cabine d'ascenseur, par cable de traction.
FR2650024A1 (fr) Dispositif de verrouillage et de deverrouillage d'issue de secours
EP0936120A1 (de) Betätigungsvorrichtung für eine gelenkige Einstiegsstufe für ein Fahrzeug und Einstiegsvorrichtung für ein Fahrzeug, insbesondere Eisenbahnfahrzeug, mit einer solchen Betätigungsvorrichtung
EP1396599A1 (de) Führungs- und Fallsicherungsvorrichtung für Kipptor

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: A1

Designated state(s): DE ES FR GB IT NL

17P Request for examination filed

Effective date: 19890220

17Q First examination report despatched

Effective date: 19900208

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT NL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19910502

Ref country code: NL

Effective date: 19910502

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19910502

Ref country code: GB

Effective date: 19910502

REF Corresponds to:

Ref document number: 3862620

Country of ref document: DE

Date of ref document: 19910606

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920720

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920828

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST