CA2028336A1 - Upper power supply arrangement for mobile vehicular apparatus with aerial platform - Google Patents
Upper power supply arrangement for mobile vehicular apparatus with aerial platformInfo
- Publication number
- CA2028336A1 CA2028336A1 CA 2028336 CA2028336A CA2028336A1 CA 2028336 A1 CA2028336 A1 CA 2028336A1 CA 2028336 CA2028336 CA 2028336 CA 2028336 A CA2028336 A CA 2028336A CA 2028336 A1 CA2028336 A1 CA 2028336A1
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- Canada
- Prior art keywords
- power supply
- platform
- manipulator
- supply arrangement
- upper power
- Prior art date
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- Abandoned
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Abstract
ABSTRACT OF THE DISCLOSURE
A mobile vehicular apparatus for moving an operator around a three-dimensional aerial work location includes a mobile vehicle having a vehicle body, a boom upwardly exten-sibly and downwardly collapsibly mounted on the vehicle body, a platform mounted on a distal end of the boom, and a manipu-lator mounted on the distal end of the boom in electrically insulated relation to the platform. The platform and the manipulator are electrically insulated from each other, and hydraulically operated generators are disposed respectively on the platform and the manipulator for energizing respec-tively electric systems mounted thereon. The electric sys-tems on the platform and the manipulator are interconnected by an optical fiber cable. Since the platform and the manip-ulator are structurally electrically insulated from each other and their electric systems are electrically insulated from each other, the operator on the platform is protected for safety against electric shocks while electric cables or the like are being processed by the manipulator under the control of the operator.
A mobile vehicular apparatus for moving an operator around a three-dimensional aerial work location includes a mobile vehicle having a vehicle body, a boom upwardly exten-sibly and downwardly collapsibly mounted on the vehicle body, a platform mounted on a distal end of the boom, and a manipu-lator mounted on the distal end of the boom in electrically insulated relation to the platform. The platform and the manipulator are electrically insulated from each other, and hydraulically operated generators are disposed respectively on the platform and the manipulator for energizing respec-tively electric systems mounted thereon. The electric sys-tems on the platform and the manipulator are interconnected by an optical fiber cable. Since the platform and the manip-ulator are structurally electrically insulated from each other and their electric systems are electrically insulated from each other, the operator on the platform is protected for safety against electric shocks while electric cables or the like are being processed by the manipulator under the control of the operator.
Description
2~2833~
UPPER POWER SUPPLY ARR~N~EMENT FOR
MOBILE V~HICULAR APPAR~TUS WITH A~RIAL PLATFORM
BACKGROUND OF THE INVENTION
The present invention rela-tes to an upper power supply arrangement Eor use with a mobile vehicular appara-tus which includes an aerial platform or cabin and manipulators that are mounted on the distal end of an insula-ted boom, the aerial platform and -the manipulator being completely electri-cally insulated -~rom each other.
; Some mobile vehicles wi-th aerial platforms are used to handle elec-tric cables suppor--ted on poles. While electric cables are being processed, it is o~ten required that the electric cables be Left "hot", i.e., an electric current flow through the elec-tric cables, in order to prevent an undesira-ble power failure.
There is known a mobile vehicle with an aerial platform and manipulators whi.ch are mounted on the distal end of a boom. The operator who stands on the plat~orm operates on a controller on the platform to actuate the manipulators for processing energized electric cables.
One conventlonal mobile vehicular apparatus wi-th an aerial platform wi.ll be describecl with re~erence to FIG. 1 of -the accompanying drawings~ Actually, FIG. :L shows a mobile vehicular apparatus wlth an aerial platform according to the present invent:ion. Since the mobile vehicular apparatus .~ .
' 2~2~33$
according to the present invention has an appearance or external s-truc-ture which is the same as tha-t of the conven--tional mobile vehicular apparatus, the conventional mobile vehicular apparatus will be described with reference to FIG.
1. The mobile vehicular apparatus, generally denoted a-t 1, comprises an upper assembly including a platform 5 and a manipulator 6 and a lower assembly including a vehicle body la. The upper and lower assemblies are electrically insulat-ed Erom each other by a distal end member 4a o~ a boom 4, the distal end member 4a being ~ade o-f a highly electrically insulating material such as FRP (Fiber-Reinforced Plastic) or -the like. The manipulator 6 is actuated by a hydraulic actuator which is disposed in the upper assembly and can be actuated by hydraulic pressure that is supplied from the lower assembly, The upper assembly has an electric control system (an upper CPU, etc.) for controlling various devices in the upper assembly, and the lower assembly also has an electric control system (a lower CPU, etc.) for controlling various devices in the lower assembly. Electric signals are transferred between these electric control systems through optical fibers. In this manner, the upper and lower assem-blies are operatively connected to each o-ther by hydraulic pressure hoses and an optical. fiber cables, and hence are electrically insulated from each other.
ThereEore, the electric insulation is sufficient].y achieved between the upper and lower assemblies of the mobile ' ~ :
2~33~
vehicular apparatus. As shown in FI~. 4, signals from a master control arm 8 and an upper controller 9 which con-trol the manipulator(slare manipula-tor arm) 6 are processed by, and control signals are supplied to the manipulator 6 from, an electric con-trol system which includes an upper CPU 81, a servo driver 83, a power supply 84, and an AC/~C conver-ter 85. The electric control system is energized by a single hydraulically operated generator G which is moun-ted on the platform 5, for example. Accordingly, i-t is impossible to electrically isolate the platform 5 and the manipulator 5 ~rom each other. The operator M who rides on the plat-form 5 and opera-tes the manipulator 6 is therefore exposed to clan-gers under high voltages ~rom energized eiectric cables. The mas-ter control arm 8 is an arm mounted on the plat~orm 5 and manually movable by the operator M. When the master control arm 8 is moved by the operator M, the manipulator 6 is oper-atedl following the motion of the master control arm 8.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an upper power supply arrangement for a mobile vehicular appara-tus with an aerial plateorm, the upper power supply arrange-ment, providing a complete electrical insulation between the platform and a ma.nipulator which is operatirely coupled ko and actuatable from the plat~orm.
According to the presen-t invention, a platEorm and a 2~33~
manipula-tor are structurally electrically insulated from each other, and independent power supply uni-ts such as hydrauli-cally operated generators are moun-ted respectively on the pla-tform and the manipulator. Flec-tric systems on the plat-form and the manipulator are energized by the respec-tive power supply units.
The pla-tform and the rnanipulator are struc-turally elec-trically insulated rom each other and their electric systems are also electrically insulated from eaeh other. There$ore, the operator on the platform is pro-tected for safety against electric shocks and can opera-te the manipula-tor highly effi-ciently while energized electric cables or the like at a high work location are being processed by the manipulator under the control of the operator.
The above and other objects, features and advantages of the present invention will become more apparent from the -Eollowing description when taken in conjuncti.on with the accompanying drawings in which preferred embodiments of the present invention are shown by way of illustrative example.
BRIEF DESCRIPTION OF TIIE DR~WINGS
FIG. 1 is a perspective view of a mobile vehicular appara-tus with an aerial platform, incorporating an upper power supply arrangement according to the present invantion;
FIG. 2 is a diagram of an electrohydraulic circuit o-f the upper powe.r supply arrangemen-t;
. . ~: : ,: :: ......... , .
:
2~2~
FI~. 3 is a side elevational view o-~ another mobile vehicular apparatus wi-th an aerial platform, which incorpo-rates an upper power supply arrangement according to the present invention; and FIG. 4 is a diagram of an elec-trohydraulic circuit of a conventional upper power supply arrangement.
DETAILED DESCRIPTION OF THE PREFERRED EMBODINENTS
FIG. 1 shows a mobile vehicular appara-tus with an aerial platform, incorporating an upper power supply arrangement according to the present inven-tion. The mobile vehicular apparatus includes an aerial platform 5 and a manipulator 6.
The mobile vehicular apparatus includes a mobile vehicle having a driver's cabin lb and a vehicle body la. The vehi-cle body la supports a turntable 2 on which there is moun-ted a telescopic boom 4 which is ~pwardly extensible and down-wardly collapsible, i.e., vertically swingable, by a cylinder 3. The telescopic boom 4 comprises three boom members, i.e., a distal boom member 4a, an intermediate boom member 4b, and proximal boom member 4c. The distal boom member 4a and the intermediate boom member 4b are slidably movable into and ou-t o~ the proximal boom member 4c by hydraulic cylinders ~not shown) disposed in the telescopic boom 4. The plat~orm 5 and the manipulator ~ are mounted on the tip end of the distal boom member 4a so that the platform 5 and the manipulator ~
can hoxizon-tally and vertical swing with respec-t -to the boom 2~33~
The pla-tform 5 is in the ~orm of an upwardly open box or a box-shaped bucket -Eor carrying an operator M therein, and is held in a horizon-tal posi-tion at all times irrespective o~
whether the boom 4.is raised or lowered. The plat~orm 6 supports a mas-ter control arm 8 ~or con-tro].lin~ operation oE
the rnanipulator 6 and a controller 9 Eor con-trolling turning movement, vertical movement, and telescopic movement of the boom 4 and also operation of the manipulator 6 in coaction with the mas-ter control arm 8. The master control arm 8 i.s manually operated by the operator M, and an operation signal produced by the master control arm 8 as operated by the operator M is processed by an upper CPU 11 (FIG. 2) and transmitted from the upper CPU 11 to a servo driver ~3 ~or controlling operation of a hydraulic servo system ~or the manipulator 6. The manipulator ~ is thus operated in a pattern corresponding to the pattern of movement of the manually operated master control arm 8.
The distal boom member ~a on which the platEorm 5 and the manipulator 6 are supported is made o~ FRP ~Fiber-Rein-forced Plastic) which is a hi.ghly el.ectrically insulating materlal. The mani.pulator 6 is supported on the distal boom member ~a by a support arm 7 positioned near the platform 5, -the support arm 7 b0ing also made of F~P. Therefore, the vehicle body la, the platEorm 5, and the manipulator 6 are electrically insulated from each other by the distal boom 2~2~33~
member 4a and the support arm 7.
FIG. 2 shows an electrohydraulic circuit of an upper power supply arrangement, for controlling operation of the manipulator ~. The electrohydraulic circuit is divided into a lower region L, an upper platform region U1, and an upper manipulator region U2 as indicated by the dot-and-dash lines.
The lower ragion L includes a lower CPU 12 and a hydrau-lic pump P drivable by an electric motor EM mounted on the vehicle body la. The hydraulic pump P is hydraulically connected to the manipula-tor 6 through hydraulic lines hl, h2 which supply working oil pr~ssur-e from the hydraulic pump P
to the manipulator 6. The lower CPU 12 is electrically connected to the upper CPU 11 in the upper pla-tform region U1 through an optical ~iber cable fl so that optical signals can be exchanged between the CPUs 12, 11. The lower CPU 12 is supplied with electric energy from the motor vehicle la.
The upper platform region Ul includes, in addition to -the master control arm 8 and the controller 9, the upper CPU
11, a DC generator G1 (first power supply unit) for supplying drive electric power to the upper CPU 11 through an electric wire el, and a Eixst hydraulic motor- Ml for dr-iving the DC
generator Gl. The master control arm 8, the controlls:r 9, the CPU 11, the DC genera-tor ~1, and the Ei.rst hydraulic motor Ml are mounted on the platEor-m 5. The first hydraulic motor M1 is actuated by hydraulic pressure which is supplied Erom the vehic].e body la through hydraulic lines h3, h4. An : . :
' 2~33~
operation signal which is sent ~rom the master control arm 8 and the controller 9 through electric wires e2, e3, e4 is applied to the upper CPU 11, processed thereby, and converted in-to an op-tical signal, which is then -transmitted to the servo driver 13 in -the upper manipulator region U2 through an optical fiber cable f2.
The upper manipulator region U2 includes, in addition to the manipulator 6, the servo driver 13, a power supply 14, an AC/DC converter 1~, an AC generator G2 (second power supply unit), and a second hydraulic mo-tor MZ. The servo driYer 13, the power supply 14, -the AC/VC converter, the AC generator G2, and the second hydraulic motor M2 are installed on the manipulator 6. The second hydraulic motor M2 is actuated by hydraulic pressure which is supplied ~rom the vehicle body la -through hydraulic lines h5, h6, thereby driving the AC gener-ator G2. An al-ternating current generated by the AC genera--tor G2 is sent through an electric wire ell to the AC~DC con-verter 15, which converts the al.-ternating curren-t into a direct current tha-t is supplied to the power supply 14 -through an electric wire el2. The current which is delivered from the power supply 14 to the servo driver 13 through an electric wire el3 is converted into a control current ~or a solenoid-oper-a-ted valve 6a Eor controll.Lng operation of the manipulator ~, in reæponse to the optical signa]. ~rom the upper CPU 11. The contro:L current is then sen-t from the servo driver 13 to the solenoid-opera-ted valve Ga through an 2~33~
elec-tric t~ire el4. Therefore, opera-tion oE the solenoid-opera-ted valYe 6 is controlled to move -the manipula-tor 6 in response -to movement of the master control. arm 8 and opera-tlon of the controller 9.
~ ith the upper power supply arrangement according to the above embodiment, the distal boom member 4a and the support arm 7 for the manipulator 6 are made oE an electrically insulating material such as FRP or the like, so that they are structurally electrically insulated. Moreover, -the genera-tors G1, G2 are moun-ted respectively on -the platform 5 and the manipulator 61 and the upper platform and manipulator regions U1, U2 are hydraulically and optically connec-ted to each other by hydraulic lines and an optical fiber cable, so that the platform 5 and the manipula-tor 6 are completely electrically insulated from each o-ther. Therefore, the operator M on the platform 5 is protected for safety against electric shocks and can operate the manipulator 6 with high efficiency while energized electric cables at an aerial work location are being processed by the manipulator 6 under the control of the operator M through the master control arm 8 and the controller 9~
While the DC generator is loca-ted in the upper pla,t~orm region Ul and -the AC generator is located in the upper manip-ulator region U2, the present invention is not limi-ted to such a generator selection, but either an AC or DC generator may be employed in ei-ther of the upper platform and manipula-_ g _ , :~' ~2~33~
tor regions Ul, U2.
Another mobile vehicular apparatus with an aerial pla-t-form or cabin, which incorpora-tes an upper power supply arrangement according -to -the present inven-tion will be de-scribed below with reference to FIG. 3.
The mobile vehicular apparatus, generally denoted at 101, includes a motor vehicle having a driver's cabin lOlb and a vehicle body lOla. The vehicle body lOla suppor-ts a turntable 102 on which there is mounted a telescopic boom 104 which is upwardly ext0nsible and downwardly collapsible by a cylinder 103. The telescopic boom 104 comprises three boom members 104a, 104b, 104c. The boom member 104a at the d.istal end of the boom 104 supports an operator's cabin (platform) 105 through a suyport 106a which can be ver-tically and hori-zontally swung with respect -to the boom 104. A pair of manipulators lOG is also operatively mounted on the support 105a.
The distal boom member 104a is made o-E a highly electr.i-cally insula-ting material. The manipulators 106 are support-ed on the support lO~a by a support arm 107 which is also made of a highly electrically insulating material. The manipula-tor-s 106 are disposed in front of the cabin (plat-Eorm) 105. Thererore, the vehicle body lOla, the cabin (platEorrrl) 105, and the manipu:Lators 106 are electrically :insulated fIom each other.
I'he upper power supply arrangement employed in the 2~2~33~
mobile vehicular apparatus 101 shown in FIG. 3 is the same as that which .is shown in FIG. 2. Thus, hydraulically opera-ted electric generators are mounted respectively on the cabin (platform) 105 and the manipulators 106, and hydraulically and optically connected to each other by hydraulic lines and an optical fiber cable.
In the above embodiments, the genera-tors are driven by the respective hydraulic motors. However, the generators may be operated by other means such as pneumatic motors or -the like according to the presen-t invention. Alternatively, batteries may be employed instead of the generators and associated components.
Although certain preferred embodiments have been shown and described, it should be understood that many changes and modifications may be made therein without depar-ting from the scope of the appended claims.
UPPER POWER SUPPLY ARR~N~EMENT FOR
MOBILE V~HICULAR APPAR~TUS WITH A~RIAL PLATFORM
BACKGROUND OF THE INVENTION
The present invention rela-tes to an upper power supply arrangement Eor use with a mobile vehicular appara-tus which includes an aerial platform or cabin and manipulators that are mounted on the distal end of an insula-ted boom, the aerial platform and -the manipulator being completely electri-cally insulated -~rom each other.
; Some mobile vehicles wi-th aerial platforms are used to handle elec-tric cables suppor--ted on poles. While electric cables are being processed, it is o~ten required that the electric cables be Left "hot", i.e., an electric current flow through the elec-tric cables, in order to prevent an undesira-ble power failure.
There is known a mobile vehicle with an aerial platform and manipulators whi.ch are mounted on the distal end of a boom. The operator who stands on the plat~orm operates on a controller on the platform to actuate the manipulators for processing energized electric cables.
One conventlonal mobile vehicular apparatus wi-th an aerial platform wi.ll be describecl with re~erence to FIG. 1 of -the accompanying drawings~ Actually, FIG. :L shows a mobile vehicular apparatus wlth an aerial platform according to the present invent:ion. Since the mobile vehicular apparatus .~ .
' 2~2~33$
according to the present invention has an appearance or external s-truc-ture which is the same as tha-t of the conven--tional mobile vehicular apparatus, the conventional mobile vehicular apparatus will be described with reference to FIG.
1. The mobile vehicular apparatus, generally denoted a-t 1, comprises an upper assembly including a platform 5 and a manipulator 6 and a lower assembly including a vehicle body la. The upper and lower assemblies are electrically insulat-ed Erom each other by a distal end member 4a o~ a boom 4, the distal end member 4a being ~ade o-f a highly electrically insulating material such as FRP (Fiber-Reinforced Plastic) or -the like. The manipulator 6 is actuated by a hydraulic actuator which is disposed in the upper assembly and can be actuated by hydraulic pressure that is supplied from the lower assembly, The upper assembly has an electric control system (an upper CPU, etc.) for controlling various devices in the upper assembly, and the lower assembly also has an electric control system (a lower CPU, etc.) for controlling various devices in the lower assembly. Electric signals are transferred between these electric control systems through optical fibers. In this manner, the upper and lower assem-blies are operatively connected to each o-ther by hydraulic pressure hoses and an optical. fiber cables, and hence are electrically insulated from each other.
ThereEore, the electric insulation is sufficient].y achieved between the upper and lower assemblies of the mobile ' ~ :
2~33~
vehicular apparatus. As shown in FI~. 4, signals from a master control arm 8 and an upper controller 9 which con-trol the manipulator(slare manipula-tor arm) 6 are processed by, and control signals are supplied to the manipulator 6 from, an electric con-trol system which includes an upper CPU 81, a servo driver 83, a power supply 84, and an AC/~C conver-ter 85. The electric control system is energized by a single hydraulically operated generator G which is moun-ted on the platform 5, for example. Accordingly, i-t is impossible to electrically isolate the platform 5 and the manipulator 5 ~rom each other. The operator M who rides on the plat-form 5 and opera-tes the manipulator 6 is therefore exposed to clan-gers under high voltages ~rom energized eiectric cables. The mas-ter control arm 8 is an arm mounted on the plat~orm 5 and manually movable by the operator M. When the master control arm 8 is moved by the operator M, the manipulator 6 is oper-atedl following the motion of the master control arm 8.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an upper power supply arrangement for a mobile vehicular appara-tus with an aerial plateorm, the upper power supply arrange-ment, providing a complete electrical insulation between the platform and a ma.nipulator which is operatirely coupled ko and actuatable from the plat~orm.
According to the presen-t invention, a platEorm and a 2~33~
manipula-tor are structurally electrically insulated from each other, and independent power supply uni-ts such as hydrauli-cally operated generators are moun-ted respectively on the pla-tform and the manipulator. Flec-tric systems on the plat-form and the manipulator are energized by the respec-tive power supply units.
The pla-tform and the rnanipulator are struc-turally elec-trically insulated rom each other and their electric systems are also electrically insulated from eaeh other. There$ore, the operator on the platform is pro-tected for safety against electric shocks and can opera-te the manipula-tor highly effi-ciently while energized electric cables or the like at a high work location are being processed by the manipulator under the control of the operator.
The above and other objects, features and advantages of the present invention will become more apparent from the -Eollowing description when taken in conjuncti.on with the accompanying drawings in which preferred embodiments of the present invention are shown by way of illustrative example.
BRIEF DESCRIPTION OF TIIE DR~WINGS
FIG. 1 is a perspective view of a mobile vehicular appara-tus with an aerial platform, incorporating an upper power supply arrangement according to the present invantion;
FIG. 2 is a diagram of an electrohydraulic circuit o-f the upper powe.r supply arrangemen-t;
. . ~: : ,: :: ......... , .
:
2~2~
FI~. 3 is a side elevational view o-~ another mobile vehicular apparatus wi-th an aerial platform, which incorpo-rates an upper power supply arrangement according to the present invention; and FIG. 4 is a diagram of an elec-trohydraulic circuit of a conventional upper power supply arrangement.
DETAILED DESCRIPTION OF THE PREFERRED EMBODINENTS
FIG. 1 shows a mobile vehicular appara-tus with an aerial platform, incorporating an upper power supply arrangement according to the present inven-tion. The mobile vehicular apparatus includes an aerial platform 5 and a manipulator 6.
The mobile vehicular apparatus includes a mobile vehicle having a driver's cabin lb and a vehicle body la. The vehi-cle body la supports a turntable 2 on which there is moun-ted a telescopic boom 4 which is ~pwardly extensible and down-wardly collapsible, i.e., vertically swingable, by a cylinder 3. The telescopic boom 4 comprises three boom members, i.e., a distal boom member 4a, an intermediate boom member 4b, and proximal boom member 4c. The distal boom member 4a and the intermediate boom member 4b are slidably movable into and ou-t o~ the proximal boom member 4c by hydraulic cylinders ~not shown) disposed in the telescopic boom 4. The plat~orm 5 and the manipulator ~ are mounted on the tip end of the distal boom member 4a so that the platform 5 and the manipulator ~
can hoxizon-tally and vertical swing with respec-t -to the boom 2~33~
The pla-tform 5 is in the ~orm of an upwardly open box or a box-shaped bucket -Eor carrying an operator M therein, and is held in a horizon-tal posi-tion at all times irrespective o~
whether the boom 4.is raised or lowered. The plat~orm 6 supports a mas-ter control arm 8 ~or con-tro].lin~ operation oE
the rnanipulator 6 and a controller 9 Eor con-trolling turning movement, vertical movement, and telescopic movement of the boom 4 and also operation of the manipulator 6 in coaction with the mas-ter control arm 8. The master control arm 8 i.s manually operated by the operator M, and an operation signal produced by the master control arm 8 as operated by the operator M is processed by an upper CPU 11 (FIG. 2) and transmitted from the upper CPU 11 to a servo driver ~3 ~or controlling operation of a hydraulic servo system ~or the manipulator 6. The manipulator ~ is thus operated in a pattern corresponding to the pattern of movement of the manually operated master control arm 8.
The distal boom member ~a on which the platEorm 5 and the manipulator 6 are supported is made o~ FRP ~Fiber-Rein-forced Plastic) which is a hi.ghly el.ectrically insulating materlal. The mani.pulator 6 is supported on the distal boom member ~a by a support arm 7 positioned near the platform 5, -the support arm 7 b0ing also made of F~P. Therefore, the vehicle body la, the platEorm 5, and the manipulator 6 are electrically insulated from each other by the distal boom 2~2~33~
member 4a and the support arm 7.
FIG. 2 shows an electrohydraulic circuit of an upper power supply arrangement, for controlling operation of the manipulator ~. The electrohydraulic circuit is divided into a lower region L, an upper platform region U1, and an upper manipulator region U2 as indicated by the dot-and-dash lines.
The lower ragion L includes a lower CPU 12 and a hydrau-lic pump P drivable by an electric motor EM mounted on the vehicle body la. The hydraulic pump P is hydraulically connected to the manipula-tor 6 through hydraulic lines hl, h2 which supply working oil pr~ssur-e from the hydraulic pump P
to the manipulator 6. The lower CPU 12 is electrically connected to the upper CPU 11 in the upper pla-tform region U1 through an optical ~iber cable fl so that optical signals can be exchanged between the CPUs 12, 11. The lower CPU 12 is supplied with electric energy from the motor vehicle la.
The upper platform region Ul includes, in addition to -the master control arm 8 and the controller 9, the upper CPU
11, a DC generator G1 (first power supply unit) for supplying drive electric power to the upper CPU 11 through an electric wire el, and a Eixst hydraulic motor- Ml for dr-iving the DC
generator Gl. The master control arm 8, the controlls:r 9, the CPU 11, the DC genera-tor ~1, and the Ei.rst hydraulic motor Ml are mounted on the platEor-m 5. The first hydraulic motor M1 is actuated by hydraulic pressure which is supplied Erom the vehic].e body la through hydraulic lines h3, h4. An : . :
' 2~33~
operation signal which is sent ~rom the master control arm 8 and the controller 9 through electric wires e2, e3, e4 is applied to the upper CPU 11, processed thereby, and converted in-to an op-tical signal, which is then -transmitted to the servo driver 13 in -the upper manipulator region U2 through an optical fiber cable f2.
The upper manipulator region U2 includes, in addition to the manipulator 6, the servo driver 13, a power supply 14, an AC/DC converter 1~, an AC generator G2 (second power supply unit), and a second hydraulic mo-tor MZ. The servo driYer 13, the power supply 14, -the AC/VC converter, the AC generator G2, and the second hydraulic motor M2 are installed on the manipulator 6. The second hydraulic motor M2 is actuated by hydraulic pressure which is supplied ~rom the vehicle body la -through hydraulic lines h5, h6, thereby driving the AC gener-ator G2. An al-ternating current generated by the AC genera--tor G2 is sent through an electric wire ell to the AC~DC con-verter 15, which converts the al.-ternating curren-t into a direct current tha-t is supplied to the power supply 14 -through an electric wire el2. The current which is delivered from the power supply 14 to the servo driver 13 through an electric wire el3 is converted into a control current ~or a solenoid-oper-a-ted valve 6a Eor controll.Lng operation of the manipulator ~, in reæponse to the optical signa]. ~rom the upper CPU 11. The contro:L current is then sen-t from the servo driver 13 to the solenoid-opera-ted valve Ga through an 2~33~
elec-tric t~ire el4. Therefore, opera-tion oE the solenoid-opera-ted valYe 6 is controlled to move -the manipula-tor 6 in response -to movement of the master control. arm 8 and opera-tlon of the controller 9.
~ ith the upper power supply arrangement according to the above embodiment, the distal boom member 4a and the support arm 7 for the manipulator 6 are made oE an electrically insulating material such as FRP or the like, so that they are structurally electrically insulated. Moreover, -the genera-tors G1, G2 are moun-ted respectively on -the platform 5 and the manipulator 61 and the upper platform and manipulator regions U1, U2 are hydraulically and optically connec-ted to each other by hydraulic lines and an optical fiber cable, so that the platform 5 and the manipula-tor 6 are completely electrically insulated from each o-ther. Therefore, the operator M on the platform 5 is protected for safety against electric shocks and can operate the manipulator 6 with high efficiency while energized electric cables at an aerial work location are being processed by the manipulator 6 under the control of the operator M through the master control arm 8 and the controller 9~
While the DC generator is loca-ted in the upper pla,t~orm region Ul and -the AC generator is located in the upper manip-ulator region U2, the present invention is not limi-ted to such a generator selection, but either an AC or DC generator may be employed in ei-ther of the upper platform and manipula-_ g _ , :~' ~2~33~
tor regions Ul, U2.
Another mobile vehicular apparatus with an aerial pla-t-form or cabin, which incorpora-tes an upper power supply arrangement according -to -the present inven-tion will be de-scribed below with reference to FIG. 3.
The mobile vehicular apparatus, generally denoted at 101, includes a motor vehicle having a driver's cabin lOlb and a vehicle body lOla. The vehicle body lOla suppor-ts a turntable 102 on which there is mounted a telescopic boom 104 which is upwardly ext0nsible and downwardly collapsible by a cylinder 103. The telescopic boom 104 comprises three boom members 104a, 104b, 104c. The boom member 104a at the d.istal end of the boom 104 supports an operator's cabin (platform) 105 through a suyport 106a which can be ver-tically and hori-zontally swung with respect -to the boom 104. A pair of manipulators lOG is also operatively mounted on the support 105a.
The distal boom member 104a is made o-E a highly electr.i-cally insula-ting material. The manipulators 106 are support-ed on the support lO~a by a support arm 107 which is also made of a highly electrically insulating material. The manipula-tor-s 106 are disposed in front of the cabin (plat-Eorm) 105. Thererore, the vehicle body lOla, the cabin (platEorrrl) 105, and the manipu:Lators 106 are electrically :insulated fIom each other.
I'he upper power supply arrangement employed in the 2~2~33~
mobile vehicular apparatus 101 shown in FIG. 3 is the same as that which .is shown in FIG. 2. Thus, hydraulically opera-ted electric generators are mounted respectively on the cabin (platform) 105 and the manipulators 106, and hydraulically and optically connected to each other by hydraulic lines and an optical fiber cable.
In the above embodiments, the genera-tors are driven by the respective hydraulic motors. However, the generators may be operated by other means such as pneumatic motors or -the like according to the presen-t invention. Alternatively, batteries may be employed instead of the generators and associated components.
Although certain preferred embodiments have been shown and described, it should be understood that many changes and modifications may be made therein without depar-ting from the scope of the appended claims.
Claims (8)
1. An upper power supply arrangement on an apparatus for moving an operator around a three-dimensional aerial work location, the apparatus including a mobile vehicle having a vehicle body, a boom upwardly extensibly and downwardly collapsibly mounted on the vehicle body, a platform mounted on a distal end of the boom, and a manipulator mounted on the distal end of the boom in electrically insulated relation to the platform, said upper power supply arrangement comprising:
a first electric system installed on said platform;
a first power supply unit mounted on said platform, for energizing said first electric system installed on said platform;
a second electric system installed on said manipulator;
a second power supply unit mounted on said manipulator, for energizing said second electric system installed on aid manipulator; and an optical fiber cable interconnecting said first and second electric systems.
a first electric system installed on said platform;
a first power supply unit mounted on said platform, for energizing said first electric system installed on said platform;
a second electric system installed on said manipulator;
a second power supply unit mounted on said manipulator, for energizing said second electric system installed on aid manipulator; and an optical fiber cable interconnecting said first and second electric systems.
2. An upper power supply arrangement according to claim 1, wherein said first and second power supply units comprise electric generators, respectively.
3. An upper power supply arrangement according to claim 2, further including hydraulic motors rotatable by hydraulic pressure supplied from said motor vehicle, for driving said electric generators, respectively.
4. An upper power supply arrangement according to claim 2, further including pneumatic motors rotatable by pneumatic pressure supplied from said motor vehicle, for driving said electric generators, respectively.
5. An upper power supply arrangement according to claim 1, wherein said first and second power supply units comprise batteries, respectively.
6. An upper power supply arrangement according to claim 1, wherein said platform comprises a box-shaped bucket for carrying an operator to operate said manipulator.
7. An upper power supply arrangement according to claim 1, wherein said platform comprises a cabin for accommodating an operator to operate said manipulator.
8. An upper power supply arrangement according to claim 7, wherein said manipulator comprises a pair of manipulators disposed in front of said cabin in electrically insulated relation thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2028336 CA2028336A1 (en) | 1990-10-23 | 1990-10-23 | Upper power supply arrangement for mobile vehicular apparatus with aerial platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2028336 CA2028336A1 (en) | 1990-10-23 | 1990-10-23 | Upper power supply arrangement for mobile vehicular apparatus with aerial platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2028336A1 true CA2028336A1 (en) | 1992-04-24 |
Family
ID=4146233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2028336 Abandoned CA2028336A1 (en) | 1990-10-23 | 1990-10-23 | Upper power supply arrangement for mobile vehicular apparatus with aerial platform |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2028336A1 (en) |
-
1990
- 1990-10-23 CA CA 2028336 patent/CA2028336A1/en not_active Abandoned
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Dead |