EP1371604A2 - Dispositif de levage pour un chariot de manutention - Google Patents

Dispositif de levage pour un chariot de manutention Download PDF

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Publication number
EP1371604A2
EP1371604A2 EP03012624A EP03012624A EP1371604A2 EP 1371604 A2 EP1371604 A2 EP 1371604A2 EP 03012624 A EP03012624 A EP 03012624A EP 03012624 A EP03012624 A EP 03012624A EP 1371604 A2 EP1371604 A2 EP 1371604A2
Authority
EP
European Patent Office
Prior art keywords
lifting
load
mast
force transducer
chain
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Withdrawn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
EP03012624A
Other languages
German (de)
English (en)
Other versions
EP1371604A3 (fr
Inventor
Ralf Mebert
Michael Meinhardt
Hans-Jörg Schiebel
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.)
Still Wagner GmbH and Co KG
Original Assignee
Still Wagner GmbH and Co KG
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 Still Wagner GmbH and Co KG filed Critical Still Wagner GmbH and Co KG
Publication of EP1371604A2 publication Critical patent/EP1371604A2/fr
Publication of EP1371604A3 publication Critical patent/EP1371604A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks

Definitions

  • the invention relates to a lifting device for an industrial truck with a along a Lift masts movable in the vertical direction, with a Lifting device carrying lifting chain and with a measuring device for Determining the weight of a load on the load suspension device.
  • the weight of the load on the load handling device can be very high complex via a weighing device located on the load suspension device be determined. However, this requires a special construction of the Load suspension device and the transmission of the measured signals determined movable lines. With less construction work, the weight of the load in Depending on the pressure in a hydraulic lifting cylinder can be estimated. However, since the pressure in the lifting cylinder also depends on other factors, e.g. dynamic influences or the friction conditions on the mast, the accuracy of such a measurement is not sufficient for many applications.
  • the invention is therefore based on the object of a mast for an industrial truck with a simply constructed measuring device for exact determination of the weight to make available a load on the load suspension device.
  • the measuring device has a Includes force transducer, which is arranged in the region of the lifting chain of the lifting device is.
  • the total weight of the load is from of the lifting chain.
  • the force acting on the lifting chain is therefore direct depending on the load weight. Since the lifting chain is directly on the Load suspension device is attached, arise in the arrangement of the Measuring device in the area of the lifting chain only minimal interference, e.g. as a result of existing friction between the load suspension device and the mast.
  • the measuring device is preferably designed such that the force transducer is direct or indirectly measures the tensile force acting on the lifting chain.
  • the weight of the raised load causes a tensile load acting on the lifting chain, which for example, directly via a tension measuring element or indirectly via the reaction forces an attachment point of the lifting chain on the load suspension device or on Lift mast can be measured.
  • a particularly simple embodiment is present when the force transducer is used for Measuring pressure forces is suitable. Sensors for measuring pressure forces are commercially available and have good accuracy and a long service life on.
  • the use of a sensor for measuring pressure forces is possible if the Force transducer is arranged at a fastening point of the lifting chain on the lifting mast. At the attachment point, the lifting chain is connected to the lifting mast, the on the lifting chain acting tensile force is supported as a compressive force on the lifting mast.
  • the force transducer has at least one continuous sensor.
  • a continuous one Transmitter delivers a stepless or fine-level measurement signal, which the Shows the weight of the load lifted by the lifting device.
  • a Control device of the industrial truck can thus from the output signal of the Force transducer can be concluded exactly on the load weight.
  • the force transducer has two independent elements Has transducer. Because each transmitter is one of the load weight dependent signal, there are two redundant measurement signals. These measurement signals can be compared in terms of a plausibility check. With a separate Evaluation of the measurement signals is also for their further processing steps safety-relevant functions of industrial trucks require the redundancy required.
  • the attachment point has an abutment attached to the mast, through which a fastening piece of the chain is carried out, on which the Lift chain facing away is secured by a locking piece.
  • That about that last chain link attached fastening piece can for example be an elongated Have threaded rod, which is inserted through an opening in the abutment becomes. Two nuts are then countered on the threaded rod, which so that form the locking piece.
  • a particularly favorable arrangement is when the force transducer between the Securing piece and the abutment is arranged.
  • the load cell can do this have an annular shape and is on the threaded rod of the Attachment piece of the chain attached. The power of the lifting chain is thus from that Securing piece on the force transducer and from this to the abutment transfer.
  • the invention can be used particularly advantageously when the load suspension device is guided on an additional mast, which together with the Load suspension device can be moved up and down by means of a main mast and if the measuring device is arranged in the area of the additional mast.
  • a have such additional mast in particular as a high-rack stacker or as High-bay order pickers designed for industrial trucks.
  • the additional mast is included mostly designed as a simple, non-telescopic mast, which makes a Falsification of the result of the measurement of the load weight due to lifting part of a mast is excluded.
  • Figure 1 shows an inventive designed as a high-rack stacker Truck.
  • the high-bay stacker has one that cannot be lifted Vehicle section 1, on which a telescopic main mast 2 is attached.
  • a driver's cab 3 can be raised along the main mast 2.
  • One as Load fork designed load suspension device 9 is different Movement device attached to the driver's cab 3 and can be shared with this can be raised by means of the main mast 2.
  • Movement devices are a side thruster 5 for moving the Load suspension device in the transverse direction of the high-rack stacker, one Swiveling device 6 for swiveling the load suspension device 9 around the vertical axis 7 and an additional mast 8 for lifting the Load suspension device 9 is provided relative to the driver's cab 3.
  • the additional mast 8 of the high-rack stacker is shown, with which the Load suspension device 9 can be lifted with a load 10 located thereon can.
  • a hydraulic lifting cylinder 11 provided, on the extendable piston rod, a deflection roller 12 for a Lift chain 13 is arranged.
  • the lifting chain 13 is at one end 14 on the Additional mast 8 and with the other end 15 on the load suspension device 9 attached.
  • the guide roller 12 raised, whereby the lifting chain 13 up the load suspension device 9 draws.
  • the load suspension device 9 is thus compared to one Extension movement of the piston is raised twice the lifting speed.
  • the load suspension device 9a With Dashed lines are the load suspension device 9a, the load 10a and the Deflection roller 12a shown in the raised position.
  • the measuring device for According to the invention, the weight of the load 10 is in the range of Fastening point of the lifting chain 13 on the additional lifting mast 8.
  • the area surrounding this attachment point is shown enlarged in FIG.
  • the lifting chain 13 the tensile force F, the weight of the load (10) and Load carrying device (9) carries.
  • the last link in the lifting chain 13 is a Fastening piece 16 is provided.
  • the attachment piece 16 is by a Component of the additional mast 8 inserted abutment 17 inserted.
  • a force transducer 18 for measuring Pressure forces attached.
  • Below the force transducer 18 are on one Threaded portion of the fastener 16 countered two nuts, the one Form locking piece 19, which is a pulling out of the fastening piece 16 from the Opening of the abutment 17 prevented.
  • the from the lifting chain 13 in the abutment 17th of the additional lifting mast 8 is introduced as a compressive force over the Transfer force transducer 18. This creates a function of the size of the force electrical signal, which is via a line 19 of a control device of the Truck is fed for processing.
  • the line 19 can not Movable line can be carried out because the position of the force transducer 18 is relative not changed to the additional mast 8.
  • the maximum Driving speed the permissible braking acceleration or the maximum permissible Lifting height can be determined. This can be done automatically in a control device of the Truck take place.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Loading Or Unloading Of Vehicles (AREA)
EP03012624A 2002-06-14 2003-06-03 Dispositif de levage pour un chariot de manutention Withdrawn EP1371604A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10226601 2002-06-14
DE10226601A DE10226601A1 (de) 2002-06-14 2002-06-14 Hubvorrichtung für ein Flurförderzeug

Publications (2)

Publication Number Publication Date
EP1371604A2 true EP1371604A2 (fr) 2003-12-17
EP1371604A3 EP1371604A3 (fr) 2005-06-22

Family

ID=29557832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012624A Withdrawn EP1371604A3 (fr) 2002-06-14 2003-06-03 Dispositif de levage pour un chariot de manutention

Country Status (3)

Country Link
US (1) US20040045745A1 (fr)
EP (1) EP1371604A3 (fr)
DE (1) DE10226601A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007059436A1 (de) 2007-12-10 2009-06-18 Still Wagner Gmbh Verfahren zur Lastbestimmung bei einem Flurförderzeug
DE102008000120A1 (de) * 2008-01-22 2009-07-23 Zf Friedrichshafen Ag Verfahren zur Messung der Nutzlast bei einem Telehandler
US8779306B2 (en) * 2010-02-19 2014-07-15 Methode Electronics, Inc. Weight sensing method and apparatus for forklifts
CN102145858A (zh) * 2011-03-22 2011-08-10 浙江诺力机械股份有限公司 链式起重系统称重报警方法及其装置
DE102013206539A1 (de) * 2013-04-12 2014-10-16 Jungheinrich Aktiengesellschaft Vorrichtung zur Ermittlung einer Bewegungsgeschwindigkeit oder/und einer Längung einer Last übertragenden Kette in Kettenlängsrichtung und Flurförderzeug mit einer derartigen Vorrichtung
US11565923B2 (en) 2019-02-19 2023-01-31 Crown Equipment Corporation Chain slack detection system
CN112499524B (zh) * 2020-11-24 2023-01-06 宁波朗科称重设备有限公司 物料升降搬运计量的物流设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE934572C (de) * 1952-10-02 1955-10-27 Continental Gummi Werke Ag Fahrbare Hub- und Stapelvorrichtung, insbesondere Gabelstapler
US2722411A (en) * 1953-12-10 1955-11-01 Donald W Philbrook Hydraulic lift truck scales
DE2730435A1 (de) * 1977-07-06 1979-01-18 Pfreundt Hans Guenther Verfahren zur bestimmung der von einem gabelstapler gehobenen last und vorrichtung zur durchfuehrung dieses verfahrens
US4212360A (en) * 1977-10-20 1980-07-15 Pye (Electronics Products) Limited Load measuring arrangements for fork lift trucks or the like
US4499971A (en) * 1983-04-22 1985-02-19 Crown Controls Corporation Material handling vehicle having improved chain monitoring
US5824963A (en) * 1997-03-04 1998-10-20 Gagetek Company Lifting device employing a weight integrative weighing system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783755A (en) * 1997-03-04 1998-07-21 Gagetek Company Lifting device employing an equalizer system to reduce weight measurement error

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE934572C (de) * 1952-10-02 1955-10-27 Continental Gummi Werke Ag Fahrbare Hub- und Stapelvorrichtung, insbesondere Gabelstapler
US2722411A (en) * 1953-12-10 1955-11-01 Donald W Philbrook Hydraulic lift truck scales
DE2730435A1 (de) * 1977-07-06 1979-01-18 Pfreundt Hans Guenther Verfahren zur bestimmung der von einem gabelstapler gehobenen last und vorrichtung zur durchfuehrung dieses verfahrens
US4212360A (en) * 1977-10-20 1980-07-15 Pye (Electronics Products) Limited Load measuring arrangements for fork lift trucks or the like
US4499971A (en) * 1983-04-22 1985-02-19 Crown Controls Corporation Material handling vehicle having improved chain monitoring
US5824963A (en) * 1997-03-04 1998-10-20 Gagetek Company Lifting device employing a weight integrative weighing system

Also Published As

Publication number Publication date
US20040045745A1 (en) 2004-03-11
EP1371604A3 (fr) 2005-06-22
DE10226601A1 (de) 2003-12-24

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