EP1632453A2 - Dispositif d'abaissement d'urgence du moyen de prise de charge d'un chariot de manutention - Google Patents

Dispositif d'abaissement d'urgence du moyen de prise de charge d'un chariot de manutention Download PDF

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Publication number
EP1632453A2
EP1632453A2 EP05016958A EP05016958A EP1632453A2 EP 1632453 A2 EP1632453 A2 EP 1632453A2 EP 05016958 A EP05016958 A EP 05016958A EP 05016958 A EP05016958 A EP 05016958A EP 1632453 A2 EP1632453 A2 EP 1632453A2
Authority
EP
European Patent Office
Prior art keywords
bypass
valve block
cable
shut
locking element
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
EP05016958A
Other languages
German (de)
English (en)
Other versions
EP1632453A3 (fr
EP1632453B1 (fr
Inventor
Thomas Dipl.-Ing. Stolten
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.)
Jungheinrich AG
Original Assignee
Jungheinrich 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 Jungheinrich AG filed Critical Jungheinrich AG
Publication of EP1632453A2 publication Critical patent/EP1632453A2/fr
Publication of EP1632453A3 publication Critical patent/EP1632453A3/fr
Application granted granted Critical
Publication of EP1632453B1 publication Critical patent/EP1632453B1/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
    • 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
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/002—Electrical failure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F15B20/004—Fluid pressure supply failure

Definitions

  • the invention relates to a device for emergency lowering of a load-bearing means in a stacker according to the preamble of patent claim 1.
  • the load carrying means is raised and lowered by means of at least one hydraulic cylinder.
  • a control valve is connected to selectively hold a load in a raised position, to raise or lower the load. It may be the case that when the load is raised, a failure or failure of the electrical or hydraulic supply occurs, and the operator is unable to lower the load by operating the control valve. In this case, a device is required to initiate a so-called emergency lowering.
  • shut-off valve is manually operable and can be opened in an emergency, which safely lowers the lifted load and places the vehicle in a safe condition.
  • the manual valve is located in an area of the vehicle that can be reached by the operator without the risk of being involuntarily actuated.
  • the invention has for its object to provide a device for emergency lowering of a load-bearing means in a truck, which is easy to install, requires very little space and can be realized by simple means.
  • the bypass is formed by a bypass branch in the valve block.
  • a screw-shaped locking element with an externally threaded portion is screwed into a threaded bore of the valve block.
  • a torque transmitting cable is rotatably connected to the end of the locking element.
  • a handle for the rotation of the rope is attached.
  • the blocking element is designed in the manner of a grub screw, which is known to have a tip which engages in a correspondingly shaped recess at the bottom of the threaded bore when the blocking element is in the shut-off position.
  • the blocking element may itself comprise an element, e.g. Press a ball against a seat to lock the bypass branch.
  • the cable or the flexible shaft is rotatably mounted near the handle in a stationary opening.
  • the handle for example, a hexagon, is arranged so that it can be reached by the operator in an emergency, without the risk that it will be operated unintentionally.
  • the solution according to the invention has several advantages.
  • the required components for the realization of the device are extremely simple and small in number.
  • the operating cable or the flexible shaft can be laid very easily.
  • the assembly costs are extremely low.
  • the entire device requires a small footprint.
  • the hydraulic circuit shown in Fig. 1 is used to operate a reach truck.
  • Three hydraulic cylinders 10 are used in stages for raising and lowering a load fork 12, which is shown adjacent in some operating positions.
  • Two hydraulic cylinders 14 are used to tilt the fork 12, a double cylinder 16 is used to move the fork according to arrow 18, another hydraulic cylinder 20 is the feed of the mast, not shown.
  • the side thrust cylinder 16 is again exposed at the right end of Fig. 1.
  • the control valve arrangement for actuating the individual hydraulic cylinders is accommodated in a valve block 22. It also contains a control valve 24 for actuating the hydraulic cylinders 10.
  • the hydraulic cylinders 10 are supplied via a pump 26, which draws hydraulic medium from a tank 28.
  • the control valve 24 has three positions, namely a first position for lifting the cylinder 10, a neutral position in which the hydraulic cylinders are shut off from the hydraulic supply and a lowering position, in which the hydraulic medium from the cylinder 10 is fed back into the tank 28. This is not described in detail and for the invention also immaterial.
  • Another control valve 28a is for actuating the hydraulic cylinders 14 to tilt.
  • a control valve 30 serves to actuate the hydraulic cylinder for pushing the mast.
  • a control valve 32 serves to displace the fork 12.
  • Valve block 22 is a block-like, solid housing that forms a plurality of channels and valves. Of the cylinders 10 leads a line 38 via the terminal A in the Block 22, in which a channel 40 is formed, which is guided via the control valve 24 to the port P for the pump 26. From the control valve 24, a second channel 40 leads to the port T for the tank 28.
  • the other channels and valve arrangements in the valve block 22 will not be further described as they are generally state of the art.
  • a bypass channel 42 is provided, which opens at 44 in the channel 40 and at 46 in the return flow 40.
  • a threaded bore 48 is formed, into which a locking element 50 is screwed from the outside in the form of a grub screw.
  • the grub screw which has a pointed end, closes off the channel 42 in the fully screwed-in position, so that the flow of a medium in both directions is blocked.
  • the locking member 50 is unscrewed slightly, the passage is free, and the hydraulic medium can flow back from the cylinders 10 to the tank 28.
  • a flexible shaft or a cable 52 is rotatably connected, via which a torque can be transmitted.
  • the other end of the rope 52 is shown as it is rotatably mounted in an opening 54 of a bearing member 56.
  • a hex 58 is rotatably connected in the form of an external hexagon or a hexagon socket. With the aid of the hexagon 58, a torque can be exerted on the blocking element 50 in order to rotate the blocking element 50 from the closed state into the open state.
  • the handle 58 is for example housed in the driver's cab (not shown) in such a way that it can not be involuntarily actuated, but on the other hand is operable in any operating condition of the vehicle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP05016958A 2004-09-04 2005-08-04 Dispositif d'abaissement d'urgence du moyen de prise de charge d'un chariot de manutention Expired - Lifetime EP1632453B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004042881A DE102004042881A1 (de) 2004-09-04 2004-09-04 Vorrichtung zur Notabsenkung eines Lasttragmittels bei einem Stapler

Publications (3)

Publication Number Publication Date
EP1632453A2 true EP1632453A2 (fr) 2006-03-08
EP1632453A3 EP1632453A3 (fr) 2008-01-16
EP1632453B1 EP1632453B1 (fr) 2010-07-21

Family

ID=35457795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05016958A Expired - Lifetime EP1632453B1 (fr) 2004-09-04 2005-08-04 Dispositif d'abaissement d'urgence du moyen de prise de charge d'un chariot de manutention

Country Status (4)

Country Link
US (1) US7562616B2 (fr)
EP (1) EP1632453B1 (fr)
CN (1) CN100439231C (fr)
DE (2) DE102004042881A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9902559B2 (en) * 2014-02-17 2018-02-27 The Curotto-Can, Llc Scale based load limiting mechanism for refuse vehicles with an intermediate container
US10183852B2 (en) 2015-07-30 2019-01-22 Danfoss Power Solutions Gmbh & Co Ohg Load dependent electronic valve actuator regulation and pressure compensation
CN112591674B (zh) * 2020-08-21 2024-11-26 合肥紫均科技有限公司 一种电动搬运设备的新型对插式手柄安装结构及安装方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916056A1 (de) 1998-04-10 1999-11-11 Toyoda Automatic Loom Works Öldrucksteuereinrichtung für Werkfahrzeuge

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598361A (en) * 1969-06-02 1971-08-10 Raymond W Crowe Apparatus for remotely operating drain valves
US3623698A (en) * 1970-01-30 1971-11-30 Ez Serve Inc Remote controlled oil and liquid drain valve
DE3120890A1 (de) * 1981-05-26 1983-01-05 Gustav Magenwirth Gmbh & Co, 7432 Urach Ventilfernsteuerung
US4630629A (en) * 1986-03-07 1986-12-23 General Screw Products Company Valve with compressible valve stem and valve body seals
CN2058178U (zh) * 1989-04-29 1990-06-13 彭昌宗 叉车静液压驱动控制系统
US5065983A (en) * 1990-04-03 1991-11-19 Safe-T-Jack, Inc. Hydraulic power unit for jack system
US5577876A (en) * 1994-02-22 1996-11-26 Clark Equipment Company Hydraulic interblock system
CN2218734Y (zh) * 1994-11-04 1996-01-31 洪茂雄 带柄管复位及卡止装置的液压千斤顶
DE19804398A1 (de) * 1998-02-04 1999-08-05 Linde Ag Ventilanordnung für die Arbeitshydraulik eines Arbeitsfahrzeugs
US5975496A (en) * 1998-05-29 1999-11-02 Norco Industries, Inc. Multiple pump transmission jack
SE512652C2 (sv) * 1999-04-20 2000-04-17 Bt Ind Ab Anordning för, och förfarande vid, förflyttning av lastbärare hos industritruck
US6086047A (en) * 1999-07-07 2000-07-11 Lee; Steven Hydraulic jack
DE20208577U1 (de) * 2002-06-03 2003-12-11 Hawe Hydraulik Gmbh & Co. Kg Elektrohydraulische Hubsteuervorrichtung für Flurförerfahrzeuge
US6991216B1 (en) * 2003-06-12 2006-01-31 Inferno Manufacturing Corporation Valve

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19916056A1 (de) 1998-04-10 1999-11-11 Toyoda Automatic Loom Works Öldrucksteuereinrichtung für Werkfahrzeuge

Also Published As

Publication number Publication date
DE502005009936D1 (de) 2010-09-02
CN100439231C (zh) 2008-12-03
EP1632453A3 (fr) 2008-01-16
DE102004042881A1 (de) 2006-03-09
US20060049688A1 (en) 2006-03-09
CN1746102A (zh) 2006-03-15
EP1632453B1 (fr) 2010-07-21
US7562616B2 (en) 2009-07-21

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