EP0159543A2 - Hydraulic crane aerial platform attachment - Google Patents
Hydraulic crane aerial platform attachment Download PDFInfo
- Publication number
- EP0159543A2 EP0159543A2 EP85103291A EP85103291A EP0159543A2 EP 0159543 A2 EP0159543 A2 EP 0159543A2 EP 85103291 A EP85103291 A EP 85103291A EP 85103291 A EP85103291 A EP 85103291A EP 0159543 A2 EP0159543 A2 EP 0159543A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- platform
- bracket
- invention according
- lever
- brake
- 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
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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
- 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
Definitions
- This invention relates generally to aerial platforms and, more particularly, to such platforms which may be attached to and used with hydraulic cranes.
- the present invention provides an aerial platform which is pivotally suspended from a bracket pinned to the cross-shafts projecting beyond a side plate on the boon tip of a hydraulic crane.
- the pivotal suspension permits the platform to remain level as the crane boon is elevated, while the pinned connection to the cross-shafts allow the attachment to be readily removed and re-installed.
- the platform includes a basket and is positioned adjacent to the boom tip so that tools or other light materials may be exchanged between the ground and the basket by means of the whip line on the crane.
- a dash pot preferably in the form of an automotive shock absorber, attached between the bracket and the platform controls the rate of movement and hence prevents any sudden rotational movement of the platform relative to the boom tip as the boom is elevated into a desired working position.
- a hand operated brake is provided to prevent rotation of the platform relative to the boom tip while the platform is occupied and in a working position.
- a means for storing the platform while attached to the boon tip so that the crane remains operable for certain uses and may also be transported in a normal manner is also provided.
- a hydraulic crane indicated generally at 10, having a multi-section, extendable boom 12 pivotally mounted on the crane's upper 14.
- the upper is rotatable about a vertical axis on the lower 16.
- the entire crane 10 is supported for stability on outrigger jacks 18, which may be retracted to permit the wheels 20 on the lower 16 to engage the ground for transport in a conventional manner.
- Hydraulic cylinder means 22 is connected between the boom 12 and the upper 14. With both the boom and the cylinder means 22 fully retracted, the boon 12 is oriented as indicated by solid lines and when both the boom and the cylinder means are fully extended, the boom 12 is configured as indicated by dotted lines in Figure 1.
- An aerial platform 23 is pivotally suspended from a boom tip 24 secured on the free end of the outer section of the boom 12.
- An auxiliary hoist 26 mounted on the upper 14 has a wire rope 28, commonly referred to as a whipline, wound thereon and trained over a sheave 30, as shown in Figure 2, rotatably carried on a cross-shaft between the side plates, one of which is shown at 32, of the boom tip 24 and an auxiliary sheave 34 on a shaft cantilevered from the tip 24 by means of arm 36.
- a hook 38 is attached to the free end of the wire rope 28.
- the hook 38 will, as it approaches the boom tip as a result of the auxiliary hoist reeling in the wire rope 28, be in close proximity to the platform 23 to enable a worker on the platform to remove or attach material from or to the hook.
- a bracket 44 has a pair of tubes 46 and 48 secured thereon, which tubes engage the ends of the cross-shafts 40 and 42 respectively.
- the tubes are cross-bored in alignment with bores provided in end fittings on the cross-shafts, one of which is shown at 50.
- a pair of pins, one of which is shown at 52 inserted through the tube 48 and the fitting 50, releasably secure the bracket 44 to the boom tip 24.
- the aerial platform 23 includes a basket 54, preferably constructed of an electrically non-conducting material, such as fiberglass, secured to a suspension link 56.
- the link 56 is pivotally connected to the bracket 44 by means of a pivot pin 58 attached to the link 56 and rotatably retained within a bushing 60 provided in the bracket 44.
- a dash pot which may be an automotive shock absorber 62, is pivotally attached at 64 to the bracket 44 and at 66 to an arm 68 secured to the link 56. Rotation of the link 56 clockwise, is viewed in Figure 2, will cause extension of the shock absorber 62, and rotation in the opposite direction will cause retraction.
- the shock absorber 62 will control the rate of such rotation, and hence will preclude any sudden rotational movement to the basket 54 while-the boom is being elevated or lowered.
- the basket 54 will remain virtually vertical when moved to and from a working position. Movement of the occupant and the shifting of his or her center of gravity resulting therefrom will not cause an unsettling and unexpected sudden rotation of the basket.
- a brake, indicated generally at 70, is provided to lock the link 56 relative to the bracket 44.
- the brake 70 includes a rotor sector 72 secured to the bracket 44.
- Calipers 74 carried by an actuating member 76 secured to the link 56 are capable of engaging the rotor sector 72 to lock the link 56 to the bracket 44.
- An actuating lever 78 rotatably mounted on the member 76 has a central position, wherein the caliber 74 are out of engagement with sector 72 permitting pivoting of the link 56 relative to the bracket 44, and movement in either directon from its central position causes the caliber 74 to engage to sector 72 thereby locking the link 56 to the bracket 44.
- Movement of the actuating levers 78 is controlled by a one way control device 80, such as that made by Quadrastat Controls Corp.
- the control 80 has an input mean 82 and output means 84.
- a hand lever 86 is affixed to the input means 82 and the link 88 is pivotally connected between the output means 84 and the actuating lever 78.
- the control permits rotation of the output means 84 when a force is applied to the lever 86, but precludes such movement when forces are applied to the output means 84. Consequently, the brake 70 can be released or engaged only through manipulation of the lever 86, and unintentional release or engagement as a result of vibration or other forces applied to the output means 84 will be precluded.
- the position of the hand lever 86 when the brake 70 is released is shown by solid lines in Figure 2 and movement of this lever to either of the dotted line positions will cause the break to engage. Thus, should an occupant need to quickly apply the brake 70 he or she would not have to consider which direction to rotate the hand lever; the brake 70 will be engaged with movement in either direction.
- a loop 90 is attached to the side of the basket 54 adjacent to the boon and along the basket's bottom edge.
- a stabber member 92 is formed on a bracket 94 attached to the boom 12. The stabber member 92 engages the loop 90 when the basket is held parallel to the bottom of the boom and the boom is then fully retracted.
- An inclined surface 96 on the stabber member 92 cams the basket 54 upward to facilitate full engagement of the loop 90 by the stabber member 92 should the basket 54 not be perfectly parallel to the bottom of the boom 12.
- a rope 95 may be attached to a second loop 98 secured to the basket 54 and passed through a third loop 100 attached to bracket 94. Tension force applied to the rope 95 permits rotation of the basket 54 to its proper position for engagement of the stabber 92 with the loop 90 from a remote position. When the boom is then fully retracted, the stabber 92 will engage the loop 90.
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)
Abstract
Description
- This invention relates generally to aerial platforms and, more particularly, to such platforms which may be attached to and used with hydraulic cranes.
- The present invention provides an aerial platform which is pivotally suspended from a bracket pinned to the cross-shafts projecting beyond a side plate on the boon tip of a hydraulic crane. The pivotal suspension permits the platform to remain level as the crane boon is elevated, while the pinned connection to the cross-shafts allow the attachment to be readily removed and re-installed. The platform includes a basket and is positioned adjacent to the boom tip so that tools or other light materials may be exchanged between the ground and the basket by means of the whip line on the crane. A dash pot, preferably in the form of an automotive shock absorber, attached between the bracket and the platform controls the rate of movement and hence prevents any sudden rotational movement of the platform relative to the boom tip as the boom is elevated into a desired working position. A hand operated brake is provided to prevent rotation of the platform relative to the boom tip while the platform is occupied and in a working position. A means for storing the platform while attached to the boon tip so that the crane remains operable for certain uses and may also be transported in a normal manner is also provided.
- Other attributes and advantages of the present invention will become more readily apparent from a perusal of the following description and the accompanying drawings wherein:
- Figure 1 is a side elevational view of a hydraulic crane with the present invention attached thereto;
- Figure 2 is a detailed view of the attachment shown in Figure 1;
- Figure 3 is a view taken on line 3-3 of Figure 2 with portions broken away and eliminated; and
- Figure 4 is an expanded view of a preferred embodiment for the brake mechanism utilized in the present invention.
- Referring to Figure 1, there is shown a hydraulic crane, indicated generally at 10, having a multi-section,
extendable boom 12 pivotally mounted on the crane's upper 14. The upper is rotatable about a vertical axis on the lower 16. As illustrated in Figure 1, theentire crane 10 is supported for stability onoutrigger jacks 18, which may be retracted to permit thewheels 20 on the lower 16 to engage the ground for transport in a conventional manner. Hydraulic cylinder means 22 is connected between theboom 12 and the upper 14. With both the boom and the cylinder means 22 fully retracted, theboon 12 is oriented as indicated by solid lines and when both the boom and the cylinder means are fully extended, theboom 12 is configured as indicated by dotted lines in Figure 1. - An
aerial platform 23 is pivotally suspended from aboom tip 24 secured on the free end of the outer section of theboom 12. Anauxiliary hoist 26 mounted on the upper 14 has awire rope 28, commonly referred to as a whipline, wound thereon and trained over asheave 30, as shown in Figure 2, rotatably carried on a cross-shaft between the side plates, one of which is shown at 32, of theboom tip 24 and anauxiliary sheave 34 on a shaft cantilevered from thetip 24 by means ofarm 36. Ahook 38 is attached to the free end of thewire rope 28. Since both theplatform 23 and theauxiliary sheave 34 are suspended from theboom tip 24, thehook 38 will, as it approaches the boom tip as a result of the auxiliary hoist reeling in thewire rope 28, be in close proximity to theplatform 23 to enable a worker on the platform to remove or attach material from or to the hook. - Referring now to Figures 2 and 3, a pair of
cross-shafts side plates 32. Abracket 44 has a pair oftubes cross-shafts tube 48 and thefitting 50, releasably secure thebracket 44 to theboom tip 24. Theaerial platform 23 includes abasket 54, preferably constructed of an electrically non-conducting material, such as fiberglass, secured to asuspension link 56. Thelink 56 is pivotally connected to thebracket 44 by means of apivot pin 58 attached to thelink 56 and rotatably retained within abushing 60 provided in thebracket 44. - A dash pot, which may be an automotive shock absorber 62, is pivotally attached at 64 to the
bracket 44 and at 66 to anarm 68 secured to thelink 56. Rotation of thelink 56 clockwise, is viewed in Figure 2, will cause extension of the shock absorber 62, and rotation in the opposite direction will cause retraction. The shock absorber 62 will control the rate of such rotation, and hence will preclude any sudden rotational movement to thebasket 54 while-the boom is being elevated or lowered. Thus, thebasket 54 will remain virtually vertical when moved to and from a working position. Movement of the occupant and the shifting of his or her center of gravity resulting therefrom will not cause an unsettling and unexpected sudden rotation of the basket. - A brake, indicated generally at 70, is provided to lock the
link 56 relative to thebracket 44. When so locked by engagement of thebrake 70, an occupant of the basket is provided with a stable platform from which work may be performed on elevated structures or lines. Thebrake 70 includes arotor sector 72 secured to thebracket 44. Calipers 74 carried by an actuatingmember 76 secured to thelink 56 are capable of engaging therotor sector 72 to lock thelink 56 to thebracket 44. An actuatinglever 78 rotatably mounted on themember 76 has a central position, wherein thecaliber 74 are out of engagement withsector 72 permitting pivoting of thelink 56 relative to thebracket 44, and movement in either directon from its central position causes thecaliber 74 to engage tosector 72 thereby locking thelink 56 to thebracket 44. Movement of the actuatinglevers 78 is controlled by a oneway control device 80, such as that made by Quadrastat Controls Corp. Thecontrol 80 has aninput mean 82 and output means 84. Ahand lever 86 is affixed to the input means 82 and thelink 88 is pivotally connected between the output means 84 and the actuatinglever 78. The control permits rotation of the output means 84 when a force is applied to thelever 86, but precludes such movement when forces are applied to the output means 84. Consequently, thebrake 70 can be released or engaged only through manipulation of thelever 86, and unintentional release or engagement as a result of vibration or other forces applied to the output means 84 will be precluded. The position of thehand lever 86 when thebrake 70 is released is shown by solid lines in Figure 2 and movement of this lever to either of the dotted line positions will cause the break to engage. Thus, should an occupant need to quickly apply thebrake 70 he or she would not have to consider which direction to rotate the hand lever; thebrake 70 will be engaged with movement in either direction. - In order to store the
basket 56 along side theboom 12, aloop 90 is attached to the side of thebasket 54 adjacent to the boon and along the basket's bottom edge. Astabber member 92 is formed on abracket 94 attached to theboom 12. Thestabber member 92 engages theloop 90 when the basket is held parallel to the bottom of the boom and the boom is then fully retracted. Aninclined surface 96 on thestabber member 92 cams thebasket 54 upward to facilitate full engagement of theloop 90 by thestabber member 92 should thebasket 54 not be perfectly parallel to the bottom of theboom 12. In order to move and hold the basket in the proper position for engagement of thestabber member 92 with theloop 90, arope 95 may be attached to asecond loop 98 secured to thebasket 54 and passed through athird loop 100 attached tobracket 94. Tension force applied to therope 95 permits rotation of thebasket 54 to its proper position for engagement of thestabber 92 with theloop 90 from a remote position. When the boom is then fully retracted, thestabber 92 will engage theloop 90. - While a preferred embodiment of the present invention has been described and illustrated, it is to be understood that changes and modifications may be made therein without departing from the spirit of the invention is defined by the scope of the appended claims.
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US59701084A | 1984-04-05 | 1984-04-05 | |
US597010 | 1984-04-05 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0159543A2 true EP0159543A2 (en) | 1985-10-30 |
EP0159543A3 EP0159543A3 (en) | 1986-06-25 |
EP0159543B1 EP0159543B1 (en) | 1989-07-12 |
Family
ID=24389680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19850103291 Expired EP0159543B1 (en) | 1984-04-05 | 1985-03-21 | Hydraulic crane aerial platform attachment |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0159543B1 (en) |
JP (1) | JPS60223788A (en) |
AU (1) | AU571663B2 (en) |
CA (1) | CA1235075A (en) |
DE (1) | DE3571425D1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0387141A1 (en) * | 1989-03-09 | 1990-09-12 | Camiva | Telescopic ladder with automatic turning movement of the working-basket |
US10194595B2 (en) | 2013-05-30 | 2019-02-05 | Cnh Industrial America Llc | Bale effect linkage and methods of use |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605941A (en) * | 1969-01-09 | 1971-09-20 | Gen Cable Corp | Aerial lift with rotatable and enclosable basket |
DE2106429A1 (en) * | 1971-02-11 | 1972-08-17 | Carl Metz Gmbh, 7500 Karlsruhe | Device for guiding and / or fixing a pendulum suspended work and / or rescue cage |
DE2107821A1 (en) * | 1971-02-18 | 1972-08-31 | Carl Metz Gmbh, 7500 Karlsruhe | Device for guiding and / or fixing a pendulum suspended work and / or rescue cage |
DE2129856A1 (en) * | 1971-06-16 | 1973-01-04 | Metz Gmbh Carl | EXTENDABLE WORK BASKET AND / OR RESCUE BASKET |
US3710893A (en) * | 1971-06-21 | 1973-01-16 | Bliss & Laughlin Ind | Portable extendible crane with work basket |
GB1572440A (en) * | 1978-04-06 | 1980-07-30 | Hongisto Oy | Working platform for cranes |
US4427121A (en) * | 1982-05-03 | 1984-01-24 | Clements Shannon K | Hydraulic valve control for aerial book devices |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE792745A (en) * | 1971-12-15 | 1973-03-30 | Freen Ltd | TRANSPARENCY PROJECTION SCREEN |
JPS5834883B2 (en) * | 1973-08-22 | 1983-07-29 | 三菱電線工業株式会社 | The best way to get started |
JPS5420801U (en) * | 1977-07-07 | 1979-02-09 | ||
JPS5427761U (en) * | 1977-07-26 | 1979-02-23 | ||
US4334594A (en) * | 1978-12-13 | 1982-06-15 | Mccabe Powers Body Company | Aerial device |
-
1985
- 1985-03-13 AU AU39809/85A patent/AU571663B2/en not_active Ceased
- 1985-03-19 CA CA000476925A patent/CA1235075A/en not_active Expired
- 1985-03-21 EP EP19850103291 patent/EP0159543B1/en not_active Expired
- 1985-03-21 DE DE8585103291T patent/DE3571425D1/en not_active Expired
- 1985-04-02 JP JP6861585A patent/JPS60223788A/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605941A (en) * | 1969-01-09 | 1971-09-20 | Gen Cable Corp | Aerial lift with rotatable and enclosable basket |
DE2106429A1 (en) * | 1971-02-11 | 1972-08-17 | Carl Metz Gmbh, 7500 Karlsruhe | Device for guiding and / or fixing a pendulum suspended work and / or rescue cage |
DE2107821A1 (en) * | 1971-02-18 | 1972-08-31 | Carl Metz Gmbh, 7500 Karlsruhe | Device for guiding and / or fixing a pendulum suspended work and / or rescue cage |
DE2129856A1 (en) * | 1971-06-16 | 1973-01-04 | Metz Gmbh Carl | EXTENDABLE WORK BASKET AND / OR RESCUE BASKET |
US3710893A (en) * | 1971-06-21 | 1973-01-16 | Bliss & Laughlin Ind | Portable extendible crane with work basket |
GB1572440A (en) * | 1978-04-06 | 1980-07-30 | Hongisto Oy | Working platform for cranes |
US4427121A (en) * | 1982-05-03 | 1984-01-24 | Clements Shannon K | Hydraulic valve control for aerial book devices |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0387141A1 (en) * | 1989-03-09 | 1990-09-12 | Camiva | Telescopic ladder with automatic turning movement of the working-basket |
FR2644204A1 (en) * | 1989-03-09 | 1990-09-14 | Camiva | TELESCOPIC LADDER WITH AUTOMATIC TILTING OF ITS WORK BASKET IN TRANSPORT AND WORK POSITIONS |
US10194595B2 (en) | 2013-05-30 | 2019-02-05 | Cnh Industrial America Llc | Bale effect linkage and methods of use |
Also Published As
Publication number | Publication date |
---|---|
CA1235075A (en) | 1988-04-12 |
EP0159543B1 (en) | 1989-07-12 |
AU3980985A (en) | 1985-10-10 |
DE3571425D1 (en) | 1989-08-17 |
JPS60223788A (en) | 1985-11-08 |
AU571663B2 (en) | 1988-04-21 |
EP0159543A3 (en) | 1986-06-25 |
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