EP0476459A2 - Dispositif de sécurité pour grues - Google Patents

Dispositif de sécurité pour grues Download PDF

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Publication number
EP0476459A2
EP0476459A2 EP91115098A EP91115098A EP0476459A2 EP 0476459 A2 EP0476459 A2 EP 0476459A2 EP 91115098 A EP91115098 A EP 91115098A EP 91115098 A EP91115098 A EP 91115098A EP 0476459 A2 EP0476459 A2 EP 0476459A2
Authority
EP
European Patent Office
Prior art keywords
angle
coupled
rotation
cable drum
encoder
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
EP91115098A
Other languages
German (de)
English (en)
Other versions
EP0476459B1 (fr
EP0476459A3 (en
Inventor
Arnold Dipl.-Ing. Axmann
Reinhold Pütt
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0476459A2 publication Critical patent/EP0476459A2/fr
Publication of EP0476459A3 publication Critical patent/EP0476459A3/de
Application granted granted Critical
Publication of EP0476459B1 publication Critical patent/EP0476459B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a safety device for cranes in which at least one electric drive motor is mechanically coupled to at least one cable drum by means of gears.
  • the object of the present invention is to provide a simple and reliable safety device with which in particular the gear part located between the drive and the cable drum is monitored.
  • angle encoders which absolutely provide the angle (or position), are advantageously used as rotary angle encoders.
  • Incremental encoders can be used as speed encoders, whose output signal summed in a counter also represents a measure of the path.
  • the monitoring will have to be set up in such a way that the directional pulses emitted by the incremental encoder are supplied to electronic counters and compared with one another. It must apply that the sum of the impulses given for the drive machines normally coincides with the sum of the impulses on the cable drums - whereby the one value has to be multiplied according to the transmission ratio. If the speeds given by the drive machines do not follow the corresponding speeds on the cable drums, there is a fault in the mechanics and the drive must be stopped immediately.
  • the paths (angles) are simultaneously compared with one another via the angle sensors (angle encoders); what applies to the speeds must also apply to the paths.
  • an electric motor 1 of a hoist drives a cable drum 3 via a transmission 2.
  • An electrical incremental encoder 4 and an angle encoder 5 are mechanically coupled to the motor 1.
  • An incremental encoder 6 and an angle encoder 7 are coupled mechanically directly to the cable drum 3.
  • the output signals of the transmitters 4 to 7 are fed to an evaluation circuit 8 which emits a shutdown signal 9 in the event of a fault.
  • the output signals of the transmitters 4 to 7 are routed via matching circuits 19 and are available as signals at the outputs A, B, C, D of these matching circuits 19.
  • a pulse sequence is present at output A, which is derived from incremental encoder 4 and corresponds to the speed of motor 1.
  • the respective angle value (angle of rotation) of the drive motor 1, which is supplied by the angle encoder 5, is present at the output B.
  • the values at output A are compared with the values at output C in subtractor 22. If the difference in the rotational speeds exceeds a predetermined limit value, then an assigned limit value indicator 24 responds and emits an interference signal.
  • the signals at the outputs B and D in the subtractor 21 are compared with one another and, in the event of a deviation, a fault signal is also output via limit value detector 24.
  • the permissible differences between angles or speeds can be set differently.
  • the measures described above are used to monitor whether the gears between the motor and the drum are OK.
  • the encoders can now also be monitored, and this is based on the consideration that the time integral of the pulse sequence emitted by the angle stepper 4 must match the angle value supplied by the angle encoder 5.
  • the values supplied at the outputs A and B are compared with one another in a subtractor 20, both values having to be output in count form or in absolute form so that they are comparable. The easiest way to do this is for outputs A and C to also output the integrated speed values.
  • FIG. 3 shows the monitoring of a crane with four drive motors 10 to 13.
  • two drive motors 10 and 11 or 12 and 13 drive a planetary gear 14, which drives two cable drums 16 via further gears 15.
  • Incremental encoders 17 and angle encoders 18 are coupled to motors 10 to 13 and cable drums 16. From the output signals of the sensors, it can then be determined in the evaluation circuit whether there is any fault in the mechanics or in the sensors; For example, one will monitor whether the two motors 10 and 11 have the same speeds or cover the same rotation angle in the same period. The same applies to motors 12 and 13 with their assigned sensors. One will also monitor whether the sum of the driving speed of the motors 10th to 13 corresponds to the speed or the path of the drums 16, since this condition must be met in a planetary gear.
  • FIG. 3 is an expansion of the ideas explained at the beginning, the same basic structure of differential monitoring always remaining.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Control And Safety Of Cranes (AREA)
EP91115098A 1990-09-21 1991-09-06 Dispositif de sécurité pour grues Expired - Lifetime EP0476459B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4029992 1990-09-21
DE4029992 1990-09-21

Publications (3)

Publication Number Publication Date
EP0476459A2 true EP0476459A2 (fr) 1992-03-25
EP0476459A3 EP0476459A3 (en) 1992-11-04
EP0476459B1 EP0476459B1 (fr) 1994-05-18

Family

ID=6414732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91115098A Expired - Lifetime EP0476459B1 (fr) 1990-09-21 1991-09-06 Dispositif de sécurité pour grues

Country Status (2)

Country Link
EP (1) EP0476459B1 (fr)
DE (1) DE59101661D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905020A1 (de) * 1999-01-28 2000-08-10 Mannesmann Ag Verfahren zur ständigen Überwachung der ordnungsgemäßen Betriebsfunktion eines Kranes
WO2004016542A1 (fr) * 2002-07-25 2004-02-26 Siemens Aktiengesellschaft Systeme de portique, en particulier portique a conteneurs
WO2004077177A1 (fr) * 2003-02-28 2004-09-10 Gottwald Port Technology Gmbh Procede et dispositif pour deconnecter de maniere sure des commandes electriques
EP1510498A1 (fr) * 2003-08-25 2005-03-02 Demag Cranes & Components GmbH Procédé de surveillance d' un palan à chaine et palan à chaine
EP1675799A2 (fr) * 2003-10-01 2006-07-05 Paccar Inc. Systeme de controle electronique de treuil
DE102015102140A1 (de) 2015-02-13 2016-08-18 Terex MHPS IP Management GmbH Anordnung aus einem elektrischen Antriebsmotor, einem Getriebe und einem Drehgeber, insbesondere für einen Seilzug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031363A (en) * 1978-10-17 1980-04-23 Northern Eng Ind Crane Safety System
GB2144091A (en) * 1983-07-30 1985-02-27 Norcros Investments Ltd Crane safety device
FR2638728A1 (fr) * 1988-11-07 1990-05-11 Mannesmann Ag Dispositif de controle d'une chaine d'entrainement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2031363A (en) * 1978-10-17 1980-04-23 Northern Eng Ind Crane Safety System
GB2144091A (en) * 1983-07-30 1985-02-27 Norcros Investments Ltd Crane safety device
FR2638728A1 (fr) * 1988-11-07 1990-05-11 Mannesmann Ag Dispositif de controle d'une chaine d'entrainement

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19905020A1 (de) * 1999-01-28 2000-08-10 Mannesmann Ag Verfahren zur ständigen Überwachung der ordnungsgemäßen Betriebsfunktion eines Kranes
WO2004016542A1 (fr) * 2002-07-25 2004-02-26 Siemens Aktiengesellschaft Systeme de portique, en particulier portique a conteneurs
WO2004077177A1 (fr) * 2003-02-28 2004-09-10 Gottwald Port Technology Gmbh Procede et dispositif pour deconnecter de maniere sure des commandes electriques
JP2006519149A (ja) * 2003-02-28 2006-08-24 ゴットヴァルト ポート テクノロジー ゲーエムベーハー 周波数制御式三相クレーンモータ等の電気駆動装置を安全に断路するための方法および装置
US7515389B2 (en) 2003-02-28 2009-04-07 Gottwald Port Technology Gmbh Method and device for safely disconnecting electric drives
EP1510498A1 (fr) * 2003-08-25 2005-03-02 Demag Cranes & Components GmbH Procédé de surveillance d' un palan à chaine et palan à chaine
US7422542B2 (en) 2003-08-25 2008-09-09 Demag Cranes & Components Gmbh Method of monitoring a chain pulley block and chain pulley block apparatus
EP1675799A2 (fr) * 2003-10-01 2006-07-05 Paccar Inc. Systeme de controle electronique de treuil
EP1675799A4 (fr) * 2003-10-01 2008-09-10 Paccar Inc Systeme de controle electronique de treuil
DE102015102140A1 (de) 2015-02-13 2016-08-18 Terex MHPS IP Management GmbH Anordnung aus einem elektrischen Antriebsmotor, einem Getriebe und einem Drehgeber, insbesondere für einen Seilzug
US10202264B2 (en) 2015-02-13 2019-02-12 Konecranes Global Corporation Cable winch

Also Published As

Publication number Publication date
EP0476459B1 (fr) 1994-05-18
DE59101661D1 (de) 1994-06-23
EP0476459A3 (en) 1992-11-04

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