WO2016123005A1 - Plate-forme de travail ayant une protection contre une opération involontaire soutenue - Google Patents

Plate-forme de travail ayant une protection contre une opération involontaire soutenue Download PDF

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Publication number
WO2016123005A1
WO2016123005A1 PCT/US2016/014692 US2016014692W WO2016123005A1 WO 2016123005 A1 WO2016123005 A1 WO 2016123005A1 US 2016014692 W US2016014692 W US 2016014692W WO 2016123005 A1 WO2016123005 A1 WO 2016123005A1
Authority
WO
WIPO (PCT)
Prior art keywords
switch
bar
work platform
control panel
platform according
Prior art date
Application number
PCT/US2016/014692
Other languages
English (en)
Inventor
Ji Hong HAO
Ignacy Puszkiewicz
Bryan Scott MOCK
Todd S. BOOHER
Dorothy Gates GREENBERGER
Original Assignee
Jlg Industries, Inc.
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
Priority claimed from US14/610,996 external-priority patent/US10029899B2/en
Application filed by Jlg Industries, Inc. filed Critical Jlg Industries, Inc.
Priority to JP2017540183A priority Critical patent/JP6524245B2/ja
Priority to EP16704109.4A priority patent/EP3250499A1/fr
Priority to AU2016211769A priority patent/AU2016211769B2/en
Priority to CA2971873A priority patent/CA2971873C/fr
Priority to CN201680007416.3A priority patent/CN107257773A/zh
Publication of WO2016123005A1 publication Critical patent/WO2016123005A1/fr

Links

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
    • 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
    • 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 work platforms and, more particularly, to a work platform including provisions to enhance protection for an operator from sustained involuntary operation resulting in an impact with an obstruction or structure.
  • Lift vehicles including aerial work platforms, telehandlers such as rough terrain fork trucks with work platform attachments, and truck mounted aerial lifts are known and typically include an extendible boom, which may be positioned at different angles relative to the ground, and a work platform at an end of the extendible boom.
  • a control console including various control elements that may be manipulated by the operator to control such functions as boom angle, boom extension, rotation of the boom and/or platform on a vertical axis, and where the lift vehicle is of the self-propelled type, there are also provided engine, steering and braking controls.
  • a safety hazard can occur in a lift vehicle including a work platform when an operator is positioned between the platform and a structure that may be located overhead or behind the operator, among other places.
  • the platform may be maneuvered into a position where the operator is crushed between that structure and the platform, resulting in serious injury or death.
  • a platform it would be desirable for a platform to incorporate protective structure to enhance protection of the operator from continued involuntary operation of the machine in proximity to an obstruction or structure.
  • the protecting structure can also serve as a physical barrier to enhance protection for the operator and/or cooperate with the drive/boom functions control system to cease or reverse movement of the platform. If cooperable with the operating components of the machine, it is also desirable to prevent inadvertent tripping of the protective structure.
  • a work platform includes a floor structure having a width dimension and a depth dimension and a safety rail coupled with the floor structure and defining a personnel work area.
  • a control panel area is cooperable with the safety rail and includes a sensor support bar having a top cross bar extending along the width dimension and side bars extending substantially perpendicularly from the top cross bar.
  • the side bars define a width of the control panel area.
  • Each of the side bars includes an upper section extending from the top cross bar inward in the depth dimension to a bent section, and a lower section extending from the bent section outward in the depth dimension to the safety rail.
  • a platform switch that is configured to trip upon an application of a predetermined force is attached to the sensor support bar.
  • a switch bar is secured to the control panel area, and the platform switch is attached to the switch bar.
  • FIG. 1 illustrates an exemplary lift vehicle
  • FIGS. 2-3 show a work platform including a protection envelope of a first embodiment
  • FIG. 4 shows a control panel area and a protective envelope including a platform switch
  • FIG. 5 is a cross-sectional view of the platform switch
  • FIGS. 6-7 show an alternative design of the protection envelope including the platform switch
  • FIG. 8 shows the platform switch connected with shear elements
  • FIG. 9 is a perspective view showing an alternative platform design including the switch bar and platform switch;
  • FIG. 10 is a detailed view of the switch bar and platform switch secured to the platform of FIG. 9;
  • FIG. 11 is a close-up view of the switch bar secured to a sensor support bar of the platform shown in FIG. 9.
  • FIG. 1 illustrates an exemplary typical aerial lift vehicle including a vehicle chassis 2 supported on vehicle wheels 4.
  • a turntable and counterweight 6 are secured for rotation on the chassis 2, and an extendible boom assembly is pivotably attached at one end to the turntable 6.
  • An aerial work platform 10 is attached at an opposite end of the extendible boom 8.
  • the illustrated lift vehicle is of the self-propelled type and thus also includes a driving/control system (illustrated schematically in FIG. 1 at 12) and a control console 14 on the platform 10 with various control elements that may be manipulated by the operator to control such functions as boom angle, boom extension, rotation of the boom and/or platform on a vertical axis, and engine, steering and braking controls, etc.
  • FIGS. 2 and 3 show an exemplary work platform 10 including a protection envelope according to a first embodiment of the invention.
  • the platform 10 includes a floor structure 20, a safety rail 22 coupled with the floor structure 20 and defining a personnel work area, and a control panel area 24 in which the control panel 14 is mounted.
  • the protection envelope surrounds the control panel area 24 and serves to enhance protection for the operator from an obstruction or structure that may constitute a crushing hazard.
  • the protection envelope may include protection bars 26 on either side of the control panel area 24 extending above the safety rail 22.
  • the safety rail 22 includes side sections (the longer sections in Figs. 2 and 3) and end sections (the shorter sections in Figs. 2 and 3).
  • the control panel area 24 may be positioned within one of the side sections.
  • the protection bars 26 are disposed intermediately within the one of the side sections adjacent the control panel area 24.
  • the protection bars 26 may be disposed in alignment with the end sections of the safety rail 22 (as shown in dashed line in FIG. 3).
  • the protection bars 26 extend above the safety rail 22 by an amount sufficient to accommodate an anteroposterior diameter of an adult human (i.e., a distance between a person's front and back). In this manner, if an obstacle is encountered that could result in crushing the operator between the structure and the control panel 14, the operator will be protected from injury by the protection bars 26 with sufficient space between the control panel 14 and a top of the protection bars 26 to accommodate the operator's torso.
  • FIG. 3 shows the user in a "safe" position where an encountered structure is prevented from crushing the operator by the protection bars 26.
  • the protection envelope includes a switch bar 28 secured in the control panel area 24.
  • a platform switch 30 is attached to the switch bar 28 and includes sensors for detecting the application of a force, such as by an operator being pressed into the platform switch by an obstruction or structure.
  • the platform switch 30 is configured to trip upon an application of a predetermined force.
  • the force causing the platform switch 30 to be tripped may be applied to the platform switch 30 itself or to the switch bar 28 or to both. It has been discovered that inadvertent tripping can be avoided if the predetermined force is about 40-50 lbs over a 6" sensor (i.e., about 6.5-8.5 lbs/in).
  • the switch bar 28 and the platform switch 30 are positioned between the personnel work area and the safety rail 22. Relative to the floor structure, the switch bar 28 and the platform switch 30 are positioned above and in front of the control panel area 24. Based on an ergonomic study, it was discovered that the switch bar 28 and platform switch 30 should be positioned about 50" above the platform floor.
  • the switch 30 includes a switch housing 32 with internal ribs 34 connected between the switch housing and a pressure switch 36. Sensitivity can be adjusted by selecting a different rating pressure switch 36 and/or by adjusting the number, shape and stiffness of the ribs 34.
  • the switch bar 28 and platform switch 30 also serve as a handle bar that an operator can grab in an emergency.
  • FIGS. 6 and 7 An alternative platform switch assembly 301 is shown in Figs. 6 and 7.
  • the switch assembly 301 includes a platform switch 302 with injection molded end caps 303 and die cast mounting brackets 304.
  • the platform switch 302 operates in a similar manner to the switch 30 shown in FIGS. 4 and 5.
  • An exemplary suitable switch for the platform switch is available from Tapeswitch Corporation of Farmingdale, NY.
  • the platform switch 30, 302 and switch bar 28 may be secured to the control panel area 24 via a shear element 38.
  • the shear element 38 includes a reduced diameter section as shown that is sized to fail upon an application of a predetermined force.
  • the predetermined force at which the shear element 38 would fail is higher than the force required to trip the platform switch 30, 301.
  • nylon may be used as the material for the shear element 38, since nylon has low relative elongation to plastic. Of course, other materials may be suitable.
  • the driving components of the vehicle that are cooperable with the lifting assembly for lifting and lowering the work platform are controlled by an operator input implement on the control panel 14 and by the driving/control system 12 communicating with the driving components and the control panel 14.
  • the control system 12 also receives a signal from the platform switch 30, 302 and controls operation of the driving components based on signals from the operator input implement and the platform switch 30, 302.
  • the control system 12 is programmed to shut down driving components when the platform switch 30, 302 is tripped.
  • the control system 12 may reverse the last operation when the platform switch 30, 302 is tripped.
  • function cutout when the platform switch is tripped, the active function will be stopped immediately, and all non-active functions shall not be activated.
  • a reversal function when the platform sensor is tripped during operation, the operation required RPM target is maintained, and the active function only when the trip occurred is reversed until the reversal function is stopped.
  • a ground horn and a platform horn can be activated when the reversal function is active.
  • engine RPM is set to low, and all functions are disabled until the functions are re-engaged with the foot switch and operator controls.
  • the system may include a platform switch override button that is used to override the function cut out initiated by the platform switch.
  • override button If the override button is pressed and held, it enables the hydraulic functions if the foot switch and controls are re-engaged sequentially. In this event, function speed is set in creep mode speed automatically.
  • the controller is programmed to avoid the cut out feature being disabled before the platform switch is tripped regardless of whether the override button is pressed or released. This assures that the cut out feature will still be available if the override button is stuck or manipulated into an always-closed position.
  • the reversal function is implemented for various operating parameters of the machine. For vehicle drive, if drive orientation shows that the boom is between the two rear wheels, reversal is allowed only when the drive backward is active and the platform switch is tripped. If a drive forward request is received when the platform switch is tripped, it is treated as a bump or obstacle in the road and will not trigger the reversal function. If the drive orientation shows that the boom is not in line with the rear wheels, then both drive forward and drive backward may trigger the reversal function.
  • Additional operating parameters that are implemented with the reversal function include main lift, tower lift, main telescope (e.g., telescope out only), and swing.
  • Reversal function terminates based on the platform switch signal, footswitch signal and time parameters that are set for different functions, respectively. If the platform switch changes from trip status to non-trip status before the maximum reversal time is elapsed, then the reversal function will be stopped; otherwise, the reversal function is active until the maximum reversal time is elapsed.
  • ground control can be accessed from the ground via a switch.
  • the platform switch In the ground control mode, if the platform switch is engaged, boom operation is allowed to operate in creep speed. If the platform switch changes status from engaged to disengaged, then operation is maintained in creep speed unless the ground enable and function control switch is re-engaged.
  • FIGS. 9-11 show an alternative work platform 110 including a floor structure 120, a safety rail 122 coupled with the floor structure 120, and a control panel area 124 to which the control panel (not shown) is mounted.
  • the switch bar 28 and platform switch 30 are secured in the control panel area 124.
  • the control panel area 124 includes a sensor support bar 126 having a top crossbar 128 extending along a width dimension (W in FIG. 9) and sidebars 130 extending substantially perpendicularly from the top crossbar 128.
  • the sidebars 130 define a width of the control panel area 124.
  • the sensor support bar 126 is preferably bent from a single piece of material, although multiple pieces can be attached to one another in the arrangement shown.
  • Each of the sidebars 130 may include an upper section extending from the top crossbar inward in a depth dimension (D in FIG. 9) to a bent section.
  • a lower section preferably extends from the bent section outward in the depth dimension to the safety rail 122.
  • the upper section of the sidebars 130 may be angled downwardly from the top crossbar 128 to the bent section.
  • the lower section may extend at an angle from the bent section to the safety rail 122. As shown, the lower section may extend in a substantially straight line from the bent section to the safety rail.
  • the safety rail 122 extends above the floor structure 120 to a rail height, where the lower sections of the sidebars 130 connect to the safety rail 122 at a position about halfway between the floor structure 120 and the rail height.
  • the top crossbar 128 is preferably positioned above the rail height.
  • the switch bar 28 and the platform switch 30 may be connected to the sensor support bar 126 at the bent sections of the sidebars 130 as shown.
  • the platform switch is positioned inward in the depth dimension D of the floor structure such that an operator in the control panel area is closer to the platform switch 30 than to the safety rail 122.
  • the switch bar and platform switch are under-mounted on the sensor support bar 126 relative to an operator standing on the floor structure 120. That is, as shown in FIGS. 10 and 11, the switch bar 28 is preferably coupled to an outside surface of the sensor support bar 126 on an opposite side of the sensor support bar 126 relative to a position of an operator standing on the platform.
  • the under-mounted configuration results in a simpler assembly (e.g., without brackets 304) and improved ergonomics.
  • FIG. 11 is a close-up view of the switch bar 30 secured to the sensor support bar 126.
  • a block 132 is fixed (e.g., by welding) to the sensor support bar 126
  • a block holder 134 is fixed (e.g., by welding) to the block 132.
  • the block holder 134 receives a shear block 136 of the switch bar 30 and is secured by a fastener 138 such as a bolt or the like.
  • a similar bolt (not shown) secures the switch bar 30 to the shear block 136.
  • the protection envelope provided by the described embodiments serves to enhance protection for operators from an obstruction and continued involuntary operation.
  • the protection envelope can include physical/structural protection in the form of protection bars or the like and/or a platform switch that is tripped upon the application of a predetermined force (such as by an operator being driven toward or into the control panel by an obstruction or structure).

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

L'invention concerne une plate-forme de travail (110) qui comprend une structure de plancher (120) ayant une dimension de largeur (W) et une dimension de profondeur (D) et un rail de sécurité (122) couplé à la structure de plancher. Une zone de panneau de commande (124) peut coopérer avec le rail de sécurité et comprend une barre de support de capteur (126) ayant une barre transversale supérieure (128) s'étendant le long de la largeur et des barres latérales (130) s'étendant sensiblement perpendiculairement à partir de la barre transversale supérieure. Chacune des barres latérales comprend une section supérieure s'étendant de la barre transversale supérieure vers l'intérieur dans le sens de la profondeur jusqu'à une section incurvée, et une section inférieure s'étendant de la section incurvée vers l'extérieur dans le sens de la profondeur jusqu'au rail de sécurité. Un commutateur de plate-forme (30), qui est configuré pour se déclencher lors de l'application d'une force prédéterminée, est attaché à la barre de support de capteur par une barre de commutation (30) retenue par des éléments de cisaillement (136).
PCT/US2016/014692 2015-01-30 2016-01-25 Plate-forme de travail ayant une protection contre une opération involontaire soutenue WO2016123005A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2017540183A JP6524245B2 (ja) 2015-01-30 2016-01-25 持続的な非自発的操作（過失操作）に対する保護を備える作業プラットフォーム
EP16704109.4A EP3250499A1 (fr) 2015-01-30 2016-01-25 Plate-forme de travail ayant une protection contre une opération involontaire soutenue
AU2016211769A AU2016211769B2 (en) 2015-01-30 2016-01-25 Work platform with protection against sustained involuntary operation
CA2971873A CA2971873C (fr) 2015-01-30 2016-01-25 Plate-forme de travail ayant une protection contre une operation involontaire soutenue
CN201680007416.3A CN107257773A (zh) 2015-01-30 2016-01-25 防止持续非自愿操作的工作平台

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/610,996 2015-01-30
US14/610,996 US10029899B2 (en) 2010-12-20 2015-01-30 Work platform with protection against sustained involuntary operation

Publications (1)

Publication Number Publication Date
WO2016123005A1 true WO2016123005A1 (fr) 2016-08-04

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PCT/US2016/014692 WO2016123005A1 (fr) 2015-01-30 2016-01-25 Plate-forme de travail ayant une protection contre une opération involontaire soutenue

Country Status (6)

Country Link
EP (1) EP3250499A1 (fr)
JP (1) JP6524245B2 (fr)
CN (1) CN107257773A (fr)
AU (1) AU2016211769B2 (fr)
CA (1) CA2971873C (fr)
WO (1) WO2016123005A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018073640A1 (fr) * 2016-10-21 2018-04-26 Magni Telescopic Handlers S.R.L. Panneau de commande pour machine d'exploitation
CN108358136A (zh) * 2018-05-14 2018-08-03 浙江鼎力机械股份有限公司 工作平台防挤压系统、高空作业平台及控制方法
JP2018154499A (ja) * 2017-03-17 2018-10-04 浙江鼎力机械股▲ふん▼有限公司 電子センサー式安全防護装置を有する高所作業車
US11708254B2 (en) * 2010-12-20 2023-07-25 Jlg Industries, Inc. Opto-electric system of enhanced operator control station protection
US12006194B2 (en) 2021-01-21 2024-06-11 Oshkosh Corporation Lift device with user contact sensor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110562886B (zh) 2019-09-16 2024-05-31 浙江鼎力机械股份有限公司 一种防挤压装置及高空作业平台
CN110589729A (zh) * 2019-09-16 2019-12-20 浙江鼎力机械股份有限公司 一种防挤压机构及其作业平台

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2012088091A1 (fr) * 2010-12-20 2012-06-28 Jlg Industries, Inc. Plate-forme de travail dotée d'une protection contre une manoeuvre accidentelle prolongée
WO2014202512A1 (fr) * 2013-06-17 2014-12-24 Haulotte Group Plateforme de nacelle élévatrice et nacelle élévatrice équipée d'une telle plateforme
FR3007401A1 (fr) * 2013-06-25 2014-12-26 Haulotte Group Nacelle elevatrice a pupitre de commande securise
WO2015004178A1 (fr) * 2013-07-10 2015-01-15 Haulotte Group Plateforme de nacelle élévatrice et nacelle élévatrice équipée d'une telle plateforme

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JPH0749360B2 (ja) * 1991-10-31 1995-05-31 株式会社ジャパニック 高所作業車の安全機構
CN102259811B (zh) * 2011-04-29 2013-04-10 浙江鼎力机械有限公司 高空作业平台护栏
CN202379687U (zh) * 2011-12-21 2012-08-15 湖南星邦重工有限公司 应用于高空作业平台防护装置
GB2497803B (en) * 2011-12-21 2014-12-03 Bluesky Solutions Ltd Aerial lift with safety device and alarm
CN203877860U (zh) * 2014-04-24 2014-10-15 美通重工有限公司 蜘蛛式直臂型高空作业平台

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012088091A1 (fr) * 2010-12-20 2012-06-28 Jlg Industries, Inc. Plate-forme de travail dotée d'une protection contre une manoeuvre accidentelle prolongée
WO2014202512A1 (fr) * 2013-06-17 2014-12-24 Haulotte Group Plateforme de nacelle élévatrice et nacelle élévatrice équipée d'une telle plateforme
FR3007401A1 (fr) * 2013-06-25 2014-12-26 Haulotte Group Nacelle elevatrice a pupitre de commande securise
WO2015004178A1 (fr) * 2013-07-10 2015-01-15 Haulotte Group Plateforme de nacelle élévatrice et nacelle élévatrice équipée d'une telle plateforme

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11708254B2 (en) * 2010-12-20 2023-07-25 Jlg Industries, Inc. Opto-electric system of enhanced operator control station protection
WO2018073640A1 (fr) * 2016-10-21 2018-04-26 Magni Telescopic Handlers S.R.L. Panneau de commande pour machine d'exploitation
JP2018154499A (ja) * 2017-03-17 2018-10-04 浙江鼎力机械股▲ふん▼有限公司 電子センサー式安全防護装置を有する高所作業車
CN108358136A (zh) * 2018-05-14 2018-08-03 浙江鼎力机械股份有限公司 工作平台防挤压系统、高空作业平台及控制方法
CN108358136B (zh) * 2018-05-14 2024-02-27 浙江鼎力机械股份有限公司 工作平台防挤压系统、高空作业平台及控制方法
US12006194B2 (en) 2021-01-21 2024-06-11 Oshkosh Corporation Lift device with user contact sensor

Also Published As

Publication number Publication date
AU2016211769A1 (en) 2017-07-13
JP2018508435A (ja) 2018-03-29
JP6524245B2 (ja) 2019-06-05
EP3250499A1 (fr) 2017-12-06
CA2971873A1 (fr) 2016-08-04
AU2016211769B2 (en) 2018-04-19
CN107257773A (zh) 2017-10-17
CA2971873C (fr) 2019-02-19

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