EP3243792A1 - Support arrangement for a man cage on a cherry picker - Google Patents
Support arrangement for a man cage on a cherry picker Download PDFInfo
- Publication number
- EP3243792A1 EP3243792A1 EP17170176.6A EP17170176A EP3243792A1 EP 3243792 A1 EP3243792 A1 EP 3243792A1 EP 17170176 A EP17170176 A EP 17170176A EP 3243792 A1 EP3243792 A1 EP 3243792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support
- cage
- profile
- support profile
- holder
- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
- The present invention concerns a support arrangement for a man cage of a cherry picker which includes a lift adapted for mounting on a vehicle, the support arrangement including a cage support upon which the man cage is mounted, a support profile upon which the cage support is mounted, a rotator and a support holder on which the support profile is mounted, at which the support holder is mounted on the outermost boom of the lift.
- A cherry picker is frequently used in minor maintenance works where it does not pay to erect scaffolding and where it is not defensible to use a ladder.
- Lifts are constructed in many ways.
- Cherry pickers or servicing lifts can be of different kinds, such as scissor lifts, tower lifts, telescoping lifts and mobile lifts. Cherry pickers are typically mounted on compact, light vehicles that are capable of reaching the places where other lift vehicles are too large and heavy to access the site.
- The present invention is developed in connection with mobile lifts.
- Mobile lifts are lifts with a man cage for 1-3 persons that are to do work at height. The lift is mounted on a lorry, a truck, a van or a trailer. The larger models often extend 10-50 m up. The man cage is typically a structure with a rectangular bottom and upright support walls or support railing extending therefrom.
- A lift which is the basic element in the mobile lift can move in three dimensions, providing that the vehicle is rarely to be moved during the work.
- The lift includes a number of mutually pivotably interconnected booms. A lowermost boom in the lift is connected with a yaw gear that enables rotation of the lift about a vertical axis. Yaw gear/bearing is provided between the pedestal and the lift.
- The cage for persons to perform work at height is connected with an outermost boom in the lift.
- The lift will thus include at least two mutually pivoting booms. The booms are mutually pivotable about horizontally oriented axes such that the mutual pivoting of the booms establish lifting and lowering of the man cage.
- The outermost boom, technically called a flyboom, is designed as a parallelogram in order to displace the support holder and thereby the man cage by parallel displacement, ensuring that the bottom of the man cage remains largely horizontal during its movement. The lift can be provided with sensors or guides that ensure the parallel displacement.
- The booms can be adapted with fixed length or include telescoping booms that contribute to increasing the reach.
- The booms are made of high-strength steel. The electro-hydraulic control of the lift may have several automated functions.
- The man cage is supported on the boom by a support arrangement. This includes a cage support in the form of cross-struts, a frame, an H-profile or the like for providing fastening to areas close to the corners of the man cage. In the description below the term "cage support" will mean a supporting structure supporting the man cage irrespectively of its shape. The support arrangement furthermore includes a support profile upon which the cage support is mounted and which is connected to the outermost boom via a support holder unit.
- The man cage is therefore connected with the outermost boom such that it is pivoting together with the boom, and it is spaced apart from the outermost boom at a distance determined by the size and shape of the support holder and the support profile.
- It is desirable to pivot or rotate the man cage about a vertical rotary axis such that it is possible to orient the man cage independently of the rotation of the booms. This is desirable in certain work situations, for example if a vehicle is parked close to and drives along a wall or the like where work is to be performed at height. Here it may be desirable that a certain side of the cage faces a working area.
- The support arrangement may include a so-called rotator enabling the cage to turn sideways relative to the outermost boom.
-
AU-B-72988/94 - There will be a risk that the man cage will interfere with the outermost boom by the rotation. This risk is particularly pronounced when the outermost boom is made as a parallelogram as in this construction since guide rods are provided at each side of a main profile in order to establish the parallel displacement. This wide construction limits the possibility of rotating the man cage.
- The man cage may alternatively be mounted on a rotator that includes a long support profile. The man cage can hereby be pivoted by a large radius so that it clears the outermost boom. However, this will result in a space-consuming construction as the man cage is placed far from the outermost boom.
- It is the purpose of the present invention to remedy this drawback and enable great freedom in rotating the man cage in relation to the outermost boom.
- According to a further aspect it is desirable that operation of the man cage is effected in a simple way without any risk of faulty operation.
- According to the present invention, this is achieved by a support arrangement of the kind mentioned in the introduction, which is peculiar in that the cage support is mounted displaceable along the support profile, and that the support profile is mounted on the support holder for pivoting by rotation about a vertical rotary axis, and that the support arrangement includes moving means adapted to establish displacement of the cage support along the support profile and pivoting of the support profile in relation to the support holder.
- The man cage can be provided close to the outermost boom when at its initial position and where the work to be performed does not require rotation of the man cage. When the man cage needs to be rotated relative to the outermost boom, this may be effected to a position at an angle of 90° at either side relative to the initial position of the man cage.
- The wall of the cage in a rectangular man cage, farthest from the outermost boom, can hereby be positioned in parallel with the plane in which the lift booms are pivoting. This can be effected without the risk of the man cage interfering with the outermost boom.
- Displacement of the cage support provides spacing between the cage sidewall close to the outermost boom and the outermost boom such that the cage sidewall closest to the outermost boom can be pivoted and positioned outside the outermost boom, even in a situation where this outermost boom has a significant width.
- It is possible to vary the displacement of the cage support and thereby of the man cage along the support profile in dependence of the width of the outermost boom. The man cage can thereby be disposed at a desired distance from the outermost boom.
- According to an embodiment, the support arrangement according to the invention is peculiar in that the moving means are adapted for establishing a simultaneous displacement of the cage support along the support profile and pivoting of the support profile relative to the support holder.
- Hereby is provided a technically simple and efficient solution where it is possible for an operator to activate the moving means and thereby achieve a safe pivoting of the man cage without the need for an operator coordinating individual movements in the form of displacement and pivoting. Hereby, the risk of faulty operation is reduced.
- According to further embodiment, the support arrangement according to the invention is peculiar in that the moving means include a first toothed rim secured to the support profile, an interacting second toothed rim which is mounted rotatably by a bearing at the support holder and which spaced apart from its rotary axis via a rotary connection is connected with an articulated arm connected with the cage support.
- As the articulated arm is connected with the second toothed rim at a distance from its axis of rotation, a rotation will cause a displacement of the cage support and thereby of the man cage, while at the same time the engagement between the two toothed rims causes a pivoting of the support profile and thereby also of the man cage.
- The rotary connection between the second toothed rim and the articulated arm will mean that the support can be displaced along the support profile. The rotary connection can be established by means of a pivot and a bushing.
- According to further embodiment, the support arrangement according to the invention is peculiar in that the second toothed rim includes an extension extending beyond the diameter of the toothed rim, and that the articulated arm is connected with a distal end of the extension.
- By the extension it is possible to increase the radius of rotation of the rotary connection, and thereby the size of the displacement provided relative to a radius of rotation for the rotary connection situated within the toothed rim is increased. In a simple way it is thus possible to adapt a displacement in relation to an angle of rotation for the man cage. The extension can be replaceable, alternatively provided with several bushings interacting with a pivot on the articulated arm.
- According to further embodiment, the support arrangement according to the invention is peculiar in that the cage support is provided with slide shoes interacting with the support profile.
- The support profile is made of a four-edged tubular section. This may preferably be provided with slide rails that interact with the slide shoes of the cage support.
- Hereby is provided a secure guiding of the displacement and a suitable low friction between the cage support and the support profile.
- According to further embodiment, the support arrangement according to the invention is peculiar in that an actuator is arranged within the support profile, preferably a hydraulic cylinder, constituting a part of the moving means as by activation it establishes the displacement of the cage support along the support profile and the pivoting of the support profile in relation to the support holder.
- A compact design is achieved by arranging the actuator in the support profile. In a technically simple way there is established protection of the actuator against blows and impacts. The support profile, which is a strong structure, constitutes a covering of the actuator.
- According to further embodiment, the support arrangement according to the invention is peculiar in that that at one end the actuator is mounted rotatable relative to the support profile, and at the other end it is connected with a pivot arm arrangement mounted on the first toothed rim and on the support holder, such that an extending or a shortening, respectively, of the actuator produces a pivoting of the support profile in one or the other direction.
- The pivot arm arrangement is arranged such that it pivots about a rotary axis that is offset relative to the rotary axis of the first toothed rim. There is arranged a first pivot arm connected with the actuator, and a second pivot arm connected with the first toothed rim. The connection between the second pivot arm and the first toothed rim is established by a rotary connection which is also offset relative to the rotary axis of the first toothed rim.
- The rotary connection is preferably provided on an extension at a radius outside the diameter of the toothed rim. Hereby is established a moment arm so that the force requirement for pivoting the man cage can be kept low. The extension enables increasing the radius of rotation for the rotary connection and the size of the required force for providing the pivoting is thereby reduced.
- In the following, the invention will be explained in more detail with reference to the enclosed drawing wherein:
- Fig. 1
- shows a vehicle on which is mounted a man cage for a cherry picker;
- Figs. 2-7
- show partial views of a cherry picker with a man cage supported on an outermost boom via a support arrangement according to the invention, with the man cage in various positions, respectively;
- Figs. 8-12
- show views from above of a support arrangement (for the man cage which is omitted for the sake of clarity) according to the invention and shown in various positions;
- Figs. 13-17
- show the support arrangement according to the invention with partially transparent parts for illustrating the various parts of the support arrangement at various positions of the support arrangement, respectively; and
- Fig. 18
- shows an exploded perspective view of a support arrangement according to the invention.
- Identical features will be provided with the same designations in the following throughout the Figures. No specific explanation will be given in connection with each single Figure.
-
Fig. 1 shows a cherry picker 1 including alift 2 supporting aman cage 3. Thelift 2 is intended for mounting on a vehicle 4 and includes ayaw device 5 connected with the vehicle 4, enabling rotation of the cherry picker 1 about avertical axis 6. - The lift includes a
lowermost boom 7 and anoutermost boom 8 that are pivotably interconnected by a connecting joint 9. Thelowermost boom 7 includes anouter profile 10 and aninner profile 11 telescoping in theouter profile 10. Thelowermost boom 7 is mounted on theyaw device 5 via asupport holder 12 which enables the pivoting of the lowermost boom in a vertical plane corresponding to the paper plane inFig. 1 . Theoutermost boom 8 can also pivot in relation to thelowermost boom 7 in this plane. - The outermost boom is provided with a
support holder 13 constituting part of a support arrangement 14 (seeFig. 18 ) by which theman cage 3 is connected with thelift 2. This will be explained in more detail in the following. -
Fig. 18 shows an embodiment of thesupport arrangement 14 according to the invention. The support arrangement includes thesupport holder 13 which is connected with theoutermost boom 8. Aslave cylinder 15 is provided in order to ensure that the man cage is kept with its bottom 16 (seeFig. 1 ) in a horizontal orientation when lifting and lowering the man cage. - The support arrangement includes a
cage support 17. In the shown embodiment the cage support is provided as a cross where connectingpoints 18 intended for fastening the man cage in position and close to the corners of the man cage. Thecage support 17 has acentral part 19 in which is mounted slide shoes 20. - The support arrangement further includes a
support profile 21 which is provided as a four-edged tubular section in which anactuator 22 in the form of a double-acting hydraulic cylinder is mounted pivotable about apivot 23 extending through abushing 24 on the actuator. - At its other end, the
actuator 22 is connected with apivot arm arrangement 25. The connection is established viapivot 26 extending through abushing 27 for mutual rotation. - The
pivot arm arrangement 25 is mounted in a mounting fitting 28 provided in thesupport holder 13. - The
support profile 21 includes slide rails 29 interacting withslide shoes 20 for easy displacement of the cage support and thereby the man cage along thesupport profile 21. - The support arrangement furthermore includes a first
toothed rim 30 secured to thesupport profile 21 by means of mountingpins toothed rim 30 is arranged for engagement with a secondtoothed rim 33 which is mounted rotatable relative to thesupport holder 13. The secondtoothed rim 33 is thus mounted for rotation about an axis ofrotation 34. - The second toothed rim is provided with an
extension 35 which at itsdistal end 36 is provided with arotary connection 37 connected with abushing 38 on an articulatedarm 39. - The articulated
arm 39 is provided at its other end with a fastening fitting 40 mounted on thecage support 17. - When the
actuator 22 therefore rotates the secondtoothed rim 33, a displacement of the cage support along the support profile will be effected via the articulatedarm 39, and at the same time the engagement with the firsttoothed rim 30 will cause rotation of thesupport profile 31 with theman cage 3 fitted thereon. This rotation occurs about a rotary axis of the firsttoothed rim 30. -
Fig. 2 shows a perspective view of theman cage 3 mounted on theoutermost boom 8. The outermost boom is made as a parallelogram with amain profile 41 connected byguide rods 42. Theguide rods 42 are provided at either side of themain profile 41 such that a parallelogram for the displacement of the man cage is provided with a largely horizontal orientation of the bottom 16 of the man cage. Thesupport profile 21 is seen under theman cage 3. -
Fig. 3 shows a view corresponding toFig. 2 , seen from above. In this configuration the man cage will be disposed in an initial position where thecage sidewall 43 farthest from theoutermost boom 8 is situated at right angles to theplane 44 where the twobooms -
Fig. 4 shows theman cage 3 starting a counterclockwise pivoting movement. Here it is seen how the twotoothed rims -
Fig. 5 shows a position where theman cage 3 is displaced to a maximum along thesupport profile 21. It appears here that theinner wall 45 of the man cage located closest to theoutermost boom 8 is clear of theoutermost boom 8. - At this position it will be possible for an operator to perform work on an adjacent wall out from the
cage sidewall 43 which in an initial position will be farthest from theoutermost boom 8. - As the
man cage 3 frequently is rectangular with different side lengths, it is often preferred that an operator works from thesidewall 43 whereby a longer operational radius can be established than by working from one of theperpendicular sidewalls 46 that have a shorter extension that the cage sidewalls 43, 45. -
Fig. 6 shows theman cage 3 when starting a clockwise pivoting movement from the initial position shown inFig. 3 . -
Fig. 7 shows a view of theman cage 3 rotated 90° clockwise relative to its initial position. -
Fig. 8 shows a position corresponding toFig. 3 with the man cage removed such that the mutual positions of the elements of the support arrangement can be seen more clearly. -
Fig. 9 corresponds toFig. 4 , but also without the man cage.Fig. 10 corresponds toFig. 5 , but without the man cage.Fig. 11 corresponds toFig. 6 , but without the man cage.Fig. 12 corresponds toFig. 7 , but without the man cage. -
Fig. 13 is an enlarged view corresponding toFigs. 3 and8 . Thesupport profile 21 is transparent herein such that the movement of theactuator 22 is seen more clearly.Fig. 14 is also an enlarged view corresponding toFigs. 4 and9 . Here thesupport profile 21 is transparent as well. -
Fig. 15 corresponds toFigs. 5 and10 . Here thesupport profile 21 is transparent as well. Therefore it appears how theactuator 22 interacts with thepivot arm arrangement 25. -
Fig. 16 is a perspective view wherein thesupport profile 21 is transparent as well.Fig. 16 shows a position of thecage support 17 corresponding to the position shown inFigs. 3 and8 . -
Fig. 17 is a perspective view wherein thesupport profile 21 is transparent. The position shown inFig. 17 corresponds to the position shown inFigs. 5 and10 .
Claims (9)
- A support arrangement for a man cage (3) of a cherry picker (1) which includes a lift (2) adapted for mounting on a vehicle (4), the support arrangement (14) including a cage support (17) upon which the man cage is mounted (3), a support profile (21) upon which the cage support (17) is mounted, a rotator and a support holder (13) on which the support profile (21) is mounted, at which the support holder (13) is mounted on the outermost boom (8) of the lift, characterised in that the cage support (17) is mounted displaceable along the support profile (21), and that the support profile (21) is mounted on the support holder (13) for pivoting by rotation about a vertical rotary axis (34), and that the support arrangement (14) includes moving means (22,30,33,35) adapted to establish displacement of the cage support (17) along the support profile (21) and pivoting of the support profile (21) in relation to the support holder (13).
- Support arrangement according to claim 1, characterised in that the moving means (22,30,33,35) are adapted for establishing a simultaneous displacement of the cage support (17) along the support profile (21) and pivoting of the support profile (21) relative to the support holder (13).
- Support arrangement according to claim 1 or 2, characterised in that the moving means (22,30,33,35) include a first toothed rim (30) that is secured to the support profile (21), an interacting second toothed rim (33) which is rotatably mounted by a bearing at the support holder (13) and which spaced apart from its rotary axis (34) via a rotary connection (37, 38) is connected with an articulated arm (39) connected with the cage support (17).
- Support arrangement according to claim 3, characterised in that the second toothed rim (33) includes an extension (35) extending beyond the diameter of the toothed rim, and that the articulated arm (39) is connected with a distal end (36) of the extension (35).
- Support arrangement according to any preceding claim, characterised in that the cage support (17) is provided with slide shoes (20) interacting with the support profile (21).
- Support arrangement according to any preceding claim, characterised in that an actuator (22) is arranged within the support profile (21), preferably a hydraulic cylinder, constituting a part of the moving means (22,30,33,35) as by activation it establishes the displacement of the cage support (17) along the support profile (21) and the pivoting of the support profile (21) in relation to the support holder (13).
- Support arrangement according to any of claims 3-5 and claim 6, characterised in that that at one end the actuator (22) is mounted rotatable relative to the support profile (21), and at the other end it is connected with a pivot arm arrangement (25) mounted on the first toothed rim (30) and on the support holder (13) such that an extending or a shortening, respectively, of the actuator (22) produces a pivoting of the support profile (21) in one or the other direction.
- Support arrangement according to any preceding claim, characterised in that the support profile (21) is made of a four-edged tubular section.
- Support arrangement according to any preceding claim, characterised in that the support profile (17) is provided with slide shoes (29) interacting with the cage support (21).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA201670303A DK179024B1 (en) | 2016-05-09 | 2016-05-09 | Support arrangement for a basket for man lift |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3243792A1 true EP3243792A1 (en) | 2017-11-15 |
EP3243792B1 EP3243792B1 (en) | 2019-04-17 |
Family
ID=58714921
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17170176.6A Active EP3243792B1 (en) | 2016-05-09 | 2017-05-09 | Support arrangement for a man cage on a cherry picker |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3243792B1 (en) |
DK (1) | DK179024B1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2172263A (en) * | 1985-03-14 | 1986-09-17 | Nippon Light Metal Co | Inspection vehicle for bridges and high level roads |
JPS63315499A (en) * | 1987-06-17 | 1988-12-23 | 株式会社関電工 | High place operation equipment |
EP0596498A1 (en) * | 1992-11-06 | 1994-05-11 | Merlo S.P.A. Industria Metalmeccanica | Fixture for overhead control of platform lifts, and all-purpose machine fitted with such a fixture |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3283850A (en) * | 1965-04-09 | 1966-11-08 | Jones | Platform lift |
US3605941A (en) * | 1969-01-09 | 1971-09-20 | Gen Cable Corp | Aerial lift with rotatable and enclosable basket |
US4456093A (en) * | 1981-06-16 | 1984-06-26 | Interstate Electronics Corp. | Control system for aerial work platform machine and method of controlling an aerial work platform machine |
US4962827A (en) * | 1989-07-18 | 1990-10-16 | Garnett Edward V | Extendable, elevatable, rotatable, collapsible boom and basket for vehicles |
CA2055864C (en) * | 1991-11-19 | 1995-07-25 | Howard W.S. Derksen | Aerial lift platform |
US5522584A (en) * | 1993-09-15 | 1996-06-04 | Mobile Tool International, Inc. | Apparatus for placement of aerial cable with elevationally adjustable bullwheel assembly and movable worker's platform |
AU694128B2 (en) * | 1994-09-14 | 1998-07-16 | Barkly Welders Pty Ltd | Self-levelling platform assembly |
US8443936B1 (en) * | 2010-11-15 | 2013-05-21 | Timothy James Raymond | Self-contained work platform attachment for mobile cranes |
KR101025702B1 (en) * | 2010-12-27 | 2011-03-30 | 엄홍식 | Stand-alone working platform combinable with a boom |
CN103771304B (en) * | 2012-10-24 | 2016-01-06 | 浙江鼎力机械股份有限公司 | Bridge-type high-altitude operation platform |
-
2016
- 2016-05-09 DK DKPA201670303A patent/DK179024B1/en active
-
2017
- 2017-05-09 EP EP17170176.6A patent/EP3243792B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2172263A (en) * | 1985-03-14 | 1986-09-17 | Nippon Light Metal Co | Inspection vehicle for bridges and high level roads |
JPS63315499A (en) * | 1987-06-17 | 1988-12-23 | 株式会社関電工 | High place operation equipment |
EP0596498A1 (en) * | 1992-11-06 | 1994-05-11 | Merlo S.P.A. Industria Metalmeccanica | Fixture for overhead control of platform lifts, and all-purpose machine fitted with such a fixture |
Also Published As
Publication number | Publication date |
---|---|
DK179024B1 (en) | 2017-08-28 |
EP3243792B1 (en) | 2019-04-17 |
DK201670303A1 (en) | 2017-08-28 |
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