EP3450389A1 - Procédé d'agrandissement de la zone de travail - Google Patents

Procédé d'agrandissement de la zone de travail Download PDF

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Publication number
EP3450389A1
EP3450389A1 EP17188709.4A EP17188709A EP3450389A1 EP 3450389 A1 EP3450389 A1 EP 3450389A1 EP 17188709 A EP17188709 A EP 17188709A EP 3450389 A1 EP3450389 A1 EP 3450389A1
Authority
EP
European Patent Office
Prior art keywords
kinematic
kinematic element
locked
kinematics
maximum speed
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Withdrawn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
EP17188709.4A
Other languages
German (de)
English (en)
Inventor
Markus Jöhren
Ingo Hartweg
Robert Krause
Thomas Tenk
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.)
Ruthmann & Co KG GmbH
Original Assignee
Ruthmann & Co KG GmbH
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 Ruthmann & Co KG GmbH filed Critical Ruthmann & Co KG GmbH
Priority to EP17188709.4A priority Critical patent/EP3450389A1/fr
Publication of EP3450389A1 publication Critical patent/EP3450389A1/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Withdrawn legal-status Critical Current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
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms

Definitions

  • the invention relates to a method for increasing the working range in aerial work platforms, in particular mobile aerial work platforms, the aerial work platform having a kinematics structure with a plurality of independently movable kinematic elements, wherein the kinematic elements are movable into different mounting positions and for the respective installation positions each a work area is determined and a safety control in response to the respective work area only for the respective working area permissible kinematics movements of the kinematic elements are released.
  • a suitable safety control For aerial work platforms, in particular for mobile aerial work platforms, a suitable safety control must be used to ensure that the stability and strength limits are not exceeded during the operation of the aerial work platform.
  • the amount of all allowed aerial work platform positions is called a workspace.
  • Various methods can be used to determine the work area and to monitor it.
  • the normatively required boundary conditions are mathematically transformed into permitted and forbidden movements.
  • the current working area of an aerial work platform is dependent on its installation configuration, in particular the position of the support device.
  • This setup configuration identifies the components that remain unchanged during an aerial work platform deployment.
  • aerial work platforms which provide a reduced working area during the erection process. In this case, the release of a work area on the position of one or more kinematic elements of the aerial work platform, wherein the departure of this position is prevented.
  • the dead weight, payload, wind power and a dynamic load When determining the working area, according to the standard, the dead weight, payload, wind power and a dynamic load must be taken into account.
  • the dynamic load takes into account all loads on the moving parts of an aerial work platform.
  • each aerial work platform has one or more work areas which are assigned to a specific set-up configuration. In this case, the switching between the work areas in dependence on the position of the lifting device or manually.
  • the working area is adjusted in advance and can not be controlled during an aerial work platform use. The workspaces of known aerial work platforms are thus limited.
  • the object of the invention is to increase the working range of aerial work platforms, without affecting the stability.
  • At least one kinematic element being locked in its current kinematic position or limiting the speed of at least one kinematic element from its current kinematics position to a predetermined maximum speed value and then automatically switched to a workspace by the safety control is, which takes into account the dynamic load of the at least one locked or limited in its maximum speed kinematic element not or only to a reduced extent.
  • one (or possibly more) kinematic element is locked in its current position electrically, hydraulically or mechanically or in another way or it is the speed of at least one kinematic element limited to a predetermined maximum speed value (eg very slow crawl speed) and then switched to a workspace that does not or only to a lesser extent takes into account the dynamic loading of the at least one locked or limited in its maximum speed kinematic element.
  • a predetermined maximum speed value eg very slow crawl speed
  • the dynamic load of the kinematic element is usually not neglected, but taken into account to a lesser extent.
  • the position of the respective relevant kinematic element is completely arbitrary.
  • the workspace is automatically re-determined based on the current position of the particular kinematic element concerned, either by appropriate calculation or by selecting from factory stored data for all possible positions of the kinematic elements of the aerial work platform.
  • the at least one kinematic element is manually locked by the operator or the speed of the at least one kinematic element is manually limited by the operator to the maximum speed value.
  • the operator can thus decide for himself in any position of the kinematic elements that he wants to leave a certain kinematic element in the current position or move it at a low speed for a certain time.
  • This kinematic element is electrically, hydraulically or mechanically locked or limited in its speed by the intervention of the operator, and subsequently an (enlarged) working range is determined and released.
  • the position of at least one kinematic element of a sensor connected to the safety control is monitored and is detected upon detection of a standstill of the at least one kinematic element over a predetermined period of time, this at least one kinematic element of the safety control automatically in its current kinematic position.
  • this is detected by a sensor and forwarded to the safety controller, which then automatically locks the respective kinematic element in the current position and releases a larger working area.
  • the speed of at least one kinematic element is monitored by a sensor connected to the safety control and upon detection of a falling below the maximum speed value of the at least one kinematic element over a predetermined period, the speed of this at least one kinematic element of the safety control automatically to the maximum Speed value is limited. This automatically releases a larger workspace from the safety controller as well.
  • all kinematic elements is monitored. All kinematic elements which are stationary in the given period of time are then automatically locked and all kinematic elements moving at a correspondingly low speed in the given period of time are correspondingly limited in their maximum speed, so that an even larger working range is available for the remaining kinematic elements.
  • predetermined kinematics situations with at least one locked or limited in its speed to the maximum speed value kinematic element as different driving modes in a memory of the safety controller and the operator of the respective desired driving mode is selectable, which automatically by the safety control on the associated Workspaces is switched.
  • the operation can be simplified because the operator does not actively himself at least one kinematic element lock by manual intervention or limit its speed, but can select from a manageable number of predetermined driving modes.
  • a highly simplified, preferably self-propelled aerial work platform 1 comprises a chassis 2 which is free-standing by a support means 3 (for example a plurality of telescopic supports), i. not standing on the wheels, not shown, is placed on an inclined bottom surface 4.
  • a support means 3 for example a plurality of telescopic supports
  • the aerial work platform 1 has a kinematics structure with a plurality of independently movable kinematics elements, namely a lower, preferably telescopic lifting device 5, which is pivotable in a first pivot point A about a horizontal axis.
  • a lower, preferably telescopic lifting device 5 is also pivotable about a vertical axis relative to the chassis 2, which is not shown in the figures.
  • the lower lifting device 5 passes through a further pivot point B in an upper, preferably telescopic lifting device 6, at the free end of a work basket 7 is arranged.
  • the kinematics structure of the aerial work platform 1 has a multiplicity of Degrees of freedom.
  • the lower lifting device 5 can be changed by their telescopic length.
  • it can be pivoted about a vertical axis relative to the chassis 2 and about the pivot point A about a horizontal axis.
  • the upper lifting device 6 can be changed in length due to their telescopability.
  • it can be pivoted about the pivot point B about a horizontal axis relative to the lower lifting device 5.
  • the work basket 7 about a horizontal axis relative to the upper lifting device 6 can be pivoted.
  • Fig. 2 and 3 a situation of the kinematic structure is shown, in which the rotation about the pivot points A and B is allowed, ie the corresponding movements are not locked.
  • the in Fig. 2 shown dynamic forces F1a in the center of gravity of the lower lifting device 5, F2a in the center of gravity of the upper lifting device 6 and F3a in the center of gravity of the working basket 7.
  • M_Kipp_a F 1 a ⁇ L 1 a + F 2 a ⁇ L 2 a + F 3 a ⁇ L 3 a ,
  • the lower lifting device 5 for example, in the in Fig. 4 Locked position shown, so that no rotation around the pivot point A is possible, only the in Fig. 4 shown dynamic forces by a rotation about the pivot point B, namely F2b and F3b. In contrast, the dynamic force F1b is 0.
  • F 1 b 0
  • F 2 a F 2 b
  • F 3 a F 3 b L 2 a > L 2 b L 3 a > L 3 b ,
  • the tilting moment M_Kipp_b occurring due to the dynamic forces is thus smaller than the maximum tilting moment M_Kipp_a when the pivot point A is not locked, so that a larger working range is available if a rotation about the pivot point A is available is locked, which on the one hand can be done by the fact that the operator causes a mechanical, electrical or hydraulic locking of the rotary joint A or the safety control of the working platform 1 performs a lock automatically, eg if it is determined by a sensor that the lower lifting device 5 has not been pivoted about the pivot point A for a predetermined period of time.
  • the working range can also be increased by limiting the speed of a selected kinematic element to a maximum speed value (eg, crawl speed). Even such a lower speed of movement opens up the possibility of correspondingly lower consideration of the dynamic loading of the relevant kinematic element in determining the current working area and thereby increasing the working area.
  • a maximum speed value eg, crawl speed

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
EP17188709.4A 2017-08-31 2017-08-31 Procédé d'agrandissement de la zone de travail Withdrawn EP3450389A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17188709.4A EP3450389A1 (fr) 2017-08-31 2017-08-31 Procédé d'agrandissement de la zone de travail

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17188709.4A EP3450389A1 (fr) 2017-08-31 2017-08-31 Procédé d'agrandissement de la zone de travail

Publications (1)

Publication Number Publication Date
EP3450389A1 true EP3450389A1 (fr) 2019-03-06

Family

ID=59745779

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17188709.4A Withdrawn EP3450389A1 (fr) 2017-08-31 2017-08-31 Procédé d'agrandissement de la zone de travail

Country Status (1)

Country Link
EP (1) EP3450389A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807966A1 (de) 1988-03-10 1989-09-21 Ruthmann Anton Gmbh & Co Hubarbeitsbuehne mit prozessorsteuerung
DE102012106222A1 (de) 2012-07-11 2014-01-16 Ruthmann Gmbh & Co. Kg Verfahren zur automatischen Reichweitenbegrenzung bei Hubarbeitsbühnen

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3807966A1 (de) 1988-03-10 1989-09-21 Ruthmann Anton Gmbh & Co Hubarbeitsbuehne mit prozessorsteuerung
DE102012106222A1 (de) 2012-07-11 2014-01-16 Ruthmann Gmbh & Co. Kg Verfahren zur automatischen Reichweitenbegrenzung bei Hubarbeitsbühnen

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