EP3929145A1 - Hebesystem für arbeitsmaschinen - Google Patents

Hebesystem für arbeitsmaschinen Download PDF

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Publication number
EP3929145A1
EP3929145A1 EP21180411.7A EP21180411A EP3929145A1 EP 3929145 A1 EP3929145 A1 EP 3929145A1 EP 21180411 A EP21180411 A EP 21180411A EP 3929145 A1 EP3929145 A1 EP 3929145A1
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EP
European Patent Office
Prior art keywords
platform
designed
checking
operator
side wall
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
EP21180411.7A
Other languages
English (en)
French (fr)
Other versions
EP3929145B1 (de
Inventor
Marco IOTTI
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.)
Manitou Italia SRL
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Manitou Italia SRL
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Filing date
Publication date
Application filed by Manitou Italia SRL filed Critical Manitou Italia SRL
Publication of EP3929145A1 publication Critical patent/EP3929145A1/de
Application granted granted Critical
Publication of EP3929145B1 publication Critical patent/EP3929145B1/de
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    • 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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • 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
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type
    • 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 present invention relates to a lifting system equipped with a loading platform and designed for use with self-propelled operating machines, such as telescopic handlers or telehandlers, aerial platforms or other like machines.
  • self-propelled operating machines such as telescopic handlers or telehandlers, aerial platforms or other like machines.
  • Loading platforms which comprise a bottom plane, designed for supporting operators, the load and work equipment, around which there are side panels designed to prevent accidental falling.
  • the platforms are able to be connected to a telescopic lifting arm, with which the work machines are provided, by means of attachment devices.
  • the special platforms with side walls which can be tipped would have a greater risk of falling compared with those with fixed sides; however, the invention protected by the above-mentioned European patent comprises a system for consent and inhibiting based on a logic which guarantees that the operators cannot be close to the free edge of the tipped side wall, when the platform is moved, thus preventing the possibility of falling.
  • the technical purpose which forms the basis of the invention is to propose a loading platform which, included in an innovative lifting system, makes it possible to satisfy the need indicated in the previous paragraph.
  • the numeral 1 denotes a loading platform for a telehandler 2, an aerial platform or similar work machines.
  • the platform 1 according to the invention is especially designed to be connected to a lifting arm 21 with which the work machine 2 is equipped.
  • the lifting system according to the invention may be like the one described in the above-mentioned European patent No. 3392192 in the name of the same Applicant as this invention and incorporated herein by reference.
  • the platform 1 comprises a bottom plane 10, set up for supporting the operators and/or the work equipment.
  • the plane 10 is associated with side walls 11, 12, 13, 14 to prevent accidental falling of the operators or the load.
  • the plane 10 is preferably quadrangular (for example rectangular) and, therefore, the side walls 11, 12, 13, 14 are located at the perimeter of the plane 10, from which they extend to form a sort of open-topped cage.
  • the lifting arm 21 is movable and, preferably, telescopic; in detail, the arm 21 comprises a plurality of segments, inserted with the possibility of sliding one in the other, of which a proximal segment hinged to the frame of the machine 2 or to a relative rotary tower, and a distal segment which mounts the attachment device 22 for removably coupling the platform 1.
  • the platform 1 is equipped with an hooking device 15 designed for anchoring to the attachment device 22 of the arm 21, in a known manner.
  • the platform 1 may be rotatable relative to an axis which passes through the hooking device 15; in particular, the device 15 may include a hinge on which a movement device acts, preferably of the hydraulic type, acts.
  • the movements of the arm 21 are preferably achieved by means of a drive apparatus 24, 25, 26, which may include hydraulic cylinders 25, 26, activated by one or more electro-hydraulic distributors 24, not illustrated because they can also be of known type.
  • the invention also relates to the case in which the movement devices are of the electro-mechanical type and not hydraulic.
  • the platform 1 according to the invention has been designed to pass from a first to a second operating configuration and vice versa.
  • the first operating configuration may be a configuration of normal use whilst the second configuration (shown in Figure 2 ) may be used for special purposes, such as, for example, removal of sheets of asbestos from roof coverings or similar uses.
  • At least one of the side walls 11, 12, 13, 14 which surround the bottom plane 10 may be movable between an upright position, to define a first configuration of normal use of the platform 1 and a lowered position, to define a second configuration for special use of the platform 1.
  • the platform 1 when the movable side wall 11 is in the lowered position, the platform 1 is in an open configuration which allows the material to be introduced or supported, whilst in the upright position the platform 1 is closed on all sides.
  • the movable side wall 11 can be tipped, that is to say, it is designed to rotate between the upright position wherein it is substantially perpendicular to the bottom 10, like the other side walls 12, 13, 14, to a lowered position in which it defines an extension of the bottom plane 10, and is therefore parallel and/or consecutive to the bottom surface.
  • the movable side wall 11 is the outermost or "front" side wall, that is, the one opposite the rear side wall 12 which has the hooking device 15.
  • the side wall 11 which can be tipped is hinged to the bottom 10 at its lower side; auxiliary means may be provided for moving the side wall 11 between its various positions, which connect the movable side wall 11 and the bottom of the platform 1, such as, for example, gas springs, hydraulic cylinders 25, 26, etc.
  • the movable side wall 11 is equipped with a continuous surface, substantially equal to that of the bottom of the platform 1, for example comprising a sheet 110 at least partly made of metal, for example aluminium.
  • the side walls 11, 12, 13, 14 may be of the reticular (or "lattice” type), with the lattice of the movable side wall 11 which has fixed the above-mentioned continuous surface.
  • the movable side wall 11 may be equipped with two sub-side walls 111, 112 or parapets, to define, in the special operating configuration, extensions of the two fixed side walls 13, 14 positioned between the movable side wall 11 and the rear side wall 12.
  • the two sub-side walls 111, 112 may be hinged to the movable side wall 11 and can be fixed manually in a position in which they are perpendicular to the movable side wall 11.
  • the invention includes a side wall sensor designed to check whether the platform 1 is in the first or second operating configuration.
  • the side wall sensor is designed to check whether the above-mentioned movable side wall 11 is in the upright position or whether it is in the lowered position.
  • At least one control apparatus which can be operated directly by an operator and set up to control the hydraulic distributor 24, in such a way that it moves the arm 21 (and, if necessary, the tower and the rotation joint of the platform 1, if present) according to the commands selected by the operator.
  • control apparatus is connected to processing means 3, which may also consist of or comprise the control unit on the telehandler 2, which produce control signals which drive the electro-hydraulic distributor 24 which activates the hydraulic cylinders 25, 26 of the arm 21 (and also the motor of the rack which causes the rotation of the tower, if present).
  • processing means 3 may also consist of or comprise the control unit on the telehandler 2, which produce control signals which drive the electro-hydraulic distributor 24 which activates the hydraulic cylinders 25, 26 of the arm 21 (and also the motor of the rack which causes the rotation of the tower, if present).
  • the control apparatus comprises an interface, consisting for example of a joystick, pushbuttons, display (also touchscreen), levers and the like, the activation of which allows the operator to select the commands for moving the arm 21.
  • the interface of the control apparatus is configured to allow the setting or selection of position parameters, representing the movement of the arm 21 both in relation to the inclination relative to the frame of the machine 2 and in relation to the extension and shortening of the arm 21.
  • the control apparatus which may also be of known type and therefore not shown, is designed to generate control signals, as a function of the selections performed on the relative interface, whilst the processing means 3 are designed to receive these control signals and to generate and transmit to the distributor 24 drive signals as a function of the control signals received.
  • the cab control apparatus can be like those already in use in this type of vehicle. Alternatively or in addition, there may be an external apparatus, for example equipped with a remote control which can be operated by an operator outside the cab 23 of the machine 2.
  • the invention of the above-mentioned European patent advantageously allows switching the control of the movements of the arm 21 and of the platform 1 from the control apparatus on the platform 1 to the one in the cab (or outside) and vice versa, according to the different operating conditions and the various uses of the platform 1, in order to always maintain the highest degree of safety and efficiency of use.
  • the invention may also be applied to solutions which do not provide this aspect of the security system of European patent No. 3392192 .
  • This invention has been conceived in such a way as to guarantee that, especially when the platform 1 is in the open configuration, that is to say, with the movable side wall 11 lowered, it cannot be moved by the arm 21 or by its joint, unless the operators on board are wearing protective devices 41, 42 which physically anchor them to the platform 1.
  • the invention comprises, for each operator positioned on the platform, a safety device 41, 42 which can be worn for fastening him/her securely to the platform 1, such as, for example, a sling 41 connected by a cable 42 to the platform 1, preferably to a side wall 12.
  • the slings 41 are both connected by the anchoring cable 42 to the innermost side wall 12, opposite to the movable one.
  • checking means 5 are provided which are designed to detect whether the safety device 41, 42 is worn by the respective operator.
  • the above-mentioned processing means 3 are configured to allow or inhibit operation of the above-mentioned drive apparatus 24, 25, 26, which includes the hydraulic actuators 25, 26 of the arm 21 and of the platform 1, based on the detection performed by the checking means.
  • the processing means 3 may be configured in such a way as to allow the operation of the hydraulic actuators 25, 26 which move the arm 21 and platform 1 if and only if the checking means detect that each safety device 41, 42 implemented on the platform 1 is worn by a relative operator.
  • the checking means comprise an electric circuit 5 normally open which may be closed following wearing of the protective device 41, 42, thereby generating an electrical checking signal which is transmitted to the processing means 3 for its detection.
  • the circuit 5 may comprise two branches 51, 52 mounted on the sling 41 (schematically illustrated in Figure 4 ) and provided at the free ends with respective terminals, designed to be connected to each other by the operator wearing the sling 41, so as to close the circuit 5, thereby allowing the electrical signal to flow in the circuit 5 and be detected by the processing means 3.
  • a second cable 53 for transmitting electrical signals which comprises a first terminal, for example a jack, which is electrically connected to an inlet present on the platform 1 and which, at the other end, is joined to the back of the sling 41, where it splits into the two branches 51, 52 mentioned, incorporated or attached to the sling 41, which slide on the sides of the sling 41 preferably at the position of the waist of the operator.
  • the platform 1 has various electrical inputs to which the second cable 53 is connected, the inputs being connected to the electrical system of the machine 1, which is in turn connected to the processing means 3.
  • the second cables 53 of the safety devices on the platform 1 might be permanently connected to the electrical system of the telehandler 1.
  • the above-mentioned checking means are designed to transmit a first checking signal, as a function of the detection performed, which does not necessarily need to be an electrical signal, but may be an optical signal or other type; this signal is in any case processed by the processing means 3, which inhibit or allow operation of the drive apparatus 24, 25, 26 based on the checking signal.
  • the processing means 3 can assess the presence or absence of checking signals or assess a measurement of the value of the signals received and determine whether or not to allow the electro-hydraulic distributor 24 to activate the hydraulic actuators 25, 26 according to how the operator is operating the control apparatus.
  • the processing means 3 when the processing means 3 receive the control signals from the control apparatus, regardless of whether it is on the platform 1 or in the cab 23, they transmit suitable drive signals to the distributor 24 only if they have detected checking signals indicating the fact that the slings 41 have been worn and therefore the safety conditions are satisfied to allow the platform 1 to be moved.
  • the checking means may include a sensor, positioned on the safety device 41, 42, designed to detect whether the latter is worn and to consequently produce said checking signal; for example, there may be a presence sensor associated with a buckle of the sling 41 which detects whether the sling is connected.
  • the above-mentioned side wall sensor 6 (shown in a stylised form in Figure 4 ), which is designed to detect the position of the movable side wall 11, produces a second checking signal, depending on the position detected, which is processed by the processing means 3, together with the first checking signal on the wearing of the protective devices 41, 42.
  • the drive apparatus 24, 25, 26 which regulates the movement of the platform 1 is actuated or inhibited according to conditions relating to both types of check signals.
  • the checking on the condition of wearing the slings 41 by the operators on the platform 1 conditions the actuation or inhibition of the movements of the arm 21 and of the platform 1 only if the movable side wall 11 is in the lowered position, that is to say, when the risk of falling is greater.
  • the processing means 3 inhibit the activation of the hydraulic actuators 25, 26 by the distributor 24 only if the second checking signal represents the condition of side walls 11 overturned but a checking signal has not been processed which represents the condition of the sling 41 worn or not all the slings 41 connected on the platform 1 are worn, based on the respective checking signals.
  • the second cable 53 set up for electrical conduction, may be a much longer cable, for example configured like a spiral spring which surrounds the first cable 42.
  • the processing means 3 can include a memory module 31 for recording the number of safety devices 41, 42 carried on the platform 1 and which must be worn.
  • the processing means 3 may include a connection module 32 configured for detecting how many protective devices 41, 42 are connected to the electrical system of the machine, through the inputs present on the platform 1 and to record this number in the memory module 31.
  • the processing means 3 then comprise a first safety module 33, connected to the memory module 31 and configured to determine whether all the safety devices 41, 42 are worn, as a function of the first checking signals detected.
  • a second safety module 34 may be provided to determine whether the movable side wall 11 is in the lowered position, on the basis of the second check signal.
  • control module 35 configured for transmitting to the hydraulic distributor 24 control signals designed to control the drive apparatus 24, 25, 26 as a function of the control signals received from the above-mentioned control apparatuses.
  • the processing means 3 can include an enabling module 36 configured to allow or inhibit the operation of the drive module on the basis of the fact that the first and the second safety module 33, 34 have determined whether the movable side wall 11 is lowered and if all the safety devices 41, 42 are worn.
  • processing means may comprise a processing unit 3 which is presented as divided into separate functional modules for the purpose of describing the functions clearly and completely.
  • processing unit may consist of an electronic device, also of the type commonly present on this type of machines and platforms, such as the control unit mentioned above, suitably programmed to perform the functions described.
  • the various modules can correspond to hardware units and/or software routines forming part of the programmed device.
  • the functions can be performed by a plurality of electronic devices on which the above-mentioned functional modules can be distributed.
  • the processing unit may have one or more microprocessors or microcontrollers for execution of the instructions contained in the memory modules and the above-mentioned functional modules may also be distributed on a plurality of local or remote calculators based on the architecture of the network in which they reside.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Jib Cranes (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Control And Safety Of Cranes (AREA)
EP21180411.7A 2020-06-26 2021-06-18 Hebesystem für arbeitsmaschinen Active EP3929145B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102020000015508A IT202000015508A1 (it) 2020-06-26 2020-06-26 Sistema di sollevamento per macchine operatrici.

Publications (2)

Publication Number Publication Date
EP3929145A1 true EP3929145A1 (de) 2021-12-29
EP3929145B1 EP3929145B1 (de) 2024-08-07

Family

ID=72473809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21180411.7A Active EP3929145B1 (de) 2020-06-26 2021-06-18 Hebesystem für arbeitsmaschinen

Country Status (3)

Country Link
EP (1) EP3929145B1 (de)
CN (1) CN113845069A (de)
IT (1) IT202000015508A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10337336A (ja) * 1997-06-09 1998-12-22 Kao Corp 安全帯を用いる人命防護装置
EP3228581A1 (de) * 2016-04-08 2017-10-11 Socage S.r.l. Verbesserter korb für turmwagen oder dergleichen
EP3392192A1 (de) 2017-04-06 2018-10-24 Manitou Italia S.r.l. Hubsystem

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100542943C (zh) * 2007-09-24 2009-09-23 许树根 带可延伸作业平台的高空作业平台
ITUB20160363A1 (it) * 2016-01-29 2017-07-29 Manitou Italia Srl Braccio telescopico per macchine operatrici semoventi.
KR20180002403A (ko) * 2016-06-29 2018-01-08 전진씨에스엠 주식회사 활선용 절연 고소작업 붐장치
IT201700067809A1 (it) * 2017-06-19 2018-12-19 Manitou Italia Srl Attrezzatura di carico per macchine operatrici.
AT520559B1 (de) * 2017-10-03 2019-05-15 Plasser & Theurer Export Von Bahnbaumaschinen Gmbh Verfahren zum Betreiben einer schienengeführten Oberbaumaschine sowie Oberbaumaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10337336A (ja) * 1997-06-09 1998-12-22 Kao Corp 安全帯を用いる人命防護装置
EP3228581A1 (de) * 2016-04-08 2017-10-11 Socage S.r.l. Verbesserter korb für turmwagen oder dergleichen
EP3392192A1 (de) 2017-04-06 2018-10-24 Manitou Italia S.r.l. Hubsystem

Also Published As

Publication number Publication date
IT202000015508A1 (it) 2021-12-26
EP3929145B1 (de) 2024-08-07
CN113845069A (zh) 2021-12-28

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