GB2179915A - Improvement of a transportable platform with a twin telescopic arm hoist - Google Patents

Improvement of a transportable platform with a twin telescopic arm hoist Download PDF

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Publication number
GB2179915A
GB2179915A GB08619629A GB8619629A GB2179915A GB 2179915 A GB2179915 A GB 2179915A GB 08619629 A GB08619629 A GB 08619629A GB 8619629 A GB8619629 A GB 8619629A GB 2179915 A GB2179915 A GB 2179915A
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GB
United Kingdom
Prior art keywords
telescopic
trolley
arm
twin
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08619629A
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GB2179915B (en
GB8619629D0 (en
Inventor
Francesco Bono
Original Assignee
Francesco Bono
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 to IT67746/85A priority Critical patent/IT1183935B/en
Priority to IT6746886A priority patent/IT1189694B/en
Application filed by Francesco Bono filed Critical Francesco Bono
Publication of GB8619629D0 publication Critical patent/GB8619629D0/en
Publication of GB2179915A publication Critical patent/GB2179915A/en
Application granted granted Critical
Publication of GB2179915B publication Critical patent/GB2179915B/en
Expired legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/16Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure

Abstract

The transportable hoist consists of a twin-arm telescopic unit (B) (Fig. 1) comprising a given number of rectangular telescopic elements e.g. 105, 105a, Fig. 7 which can be extended longitudinally by means of a telescopic hydraulic cylinder (104). A first windlass (201) pays out steel rope 220, Fig. 9, passing round pulley 221 during this extension, and is then locked to enable further pressurization of cylinder 104 to stabilize the telescopic unit. A trolley (120) with a work platform (119) is mounted on said twin-arm unit (B) and comprises four pairs of flanged frustoconical rollers (two rollers are shown as 126, Fig. 7), each held against the telescopic elements by elastic devices, e.g. springs 130. The trolley frame comprises levers, including 124, 125, having a pantograph type articulation which also maintains the rollers against the telescopic element via the action of steel ropes 131 connected to a second windlass (121, Figs. 1 and 6), which ropes also move the trolley along the elements. The trolley is equipped with an automatic emergency brake 214. The twin-arm unit (B) is supported by a pivoting platform (101) mounted on a self- propelled or towed vehicle (A). Two telescopic cylinders (103) are used to set the angle of said unit (B) during use. A spring loaded device (Figs. 15 and 16) draws cylinder 104 if it detects any slackening in ropes 131 and completely stops all movement of the hoisting machine. <IMAGE>

Description

SPECIFICATION Improvement of a transportable platform hoist with a twin telescopic arm The same applicant holds Italian Patent No.
67746-A/85 for a hoist consisting of a twinarm telescopic unit with a pivoting base- that can be installed on different types of vehicles.
A trolley equipped with a work platform, capable of transporting men or loads to considerable heights, is mounted on said twin-arm unit; said trolley is connected to a steel cable, which in turn is connected to a windlass. A motor independent of the vehicle's engine operates the windlass and the angular movement of the pivoting platform. A single-action, telescopic hydraulic cylinder extends or retracts the telescopic elements; two hydraulic cylinders attached at the pivoting platform and at the first two elements of the twin-arm telescopic unit are used to set the angle of said unit during use. The work platform connected to the trolley is equipped with an automatic emergency brake.
As a result of the practical use of this hoisting machine according to the above mentioned patent, a series of improvements to the principal components of said machine have been made. The main improvements regard the trolley and a work platform, the trolley emergency brake and the cable system for operating said trolley along the twin-arm telescopic unit These improvements, which are the purpose of this invention, consist of the following: The trolley and platform have four pairs of symmetrical rollers; the two rollers making up each pair of rollers are located on either side of the twin telescopic arm.Said rollers, having a frustoconical profile, continuously adhere to the parallel surfaces and exterior sides of the two telescopic rails; said rollers are connected to rocker arms enabling them to conform to the variable cross section of the telescopic elements thanks to the traction of the trolley and the force exerted by elastic devices described below.
An emergency brake is automatically activated by means of the reaction of a sturdy coil spring if both pull ropes break.
The rope drive system consists of two steel ropes connected to a windlass with an incorporated brake.
The hoisting machine has a second windlass with an incorporated brake, to pressurise the telescopic hydraulic cylinder.
The invention will be described further, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an isometric view of the complete hoisting machine in the operative position mounted on a lorry; Figure 2 is schematic, longitudinal cross section on a different scale of one of the two telescopic elements; Figure 3 is a schematic, cross section of one of the two telescopic elements showing part of the trolley without the platform; Figure 4 is a side view of the components shown in Fig. 3; Figure 5 is a view in perspective from below of the components shown in Figs. 2 and 3; Figure 6 is a view in perspective of the partially extended twin-arm telescopic unit also showing the windlass used for manoeuvering the trolley; Figures 7 and 8 are views in perspective of the trolley without the platform;; Figure 9 is a schematic, plan view of the rope drive system used for manoeuvering the trolley; Figure 10 is the cross section of one of the telescopic elements at line X-X shown in Fig.
2; Figure 11 is the cross section of one of the elements making up both rails of the twin-arm telescopic unit; Figure 12 illustrates the range of the working area of the hoisting machine with respect to the longitudinal axis of the vehicle on which said machine is mounted; Figure 13 illustrates the range of the working area of the hoisting machine with respect to the lateral axis of the same vehicle; Figure 14 shows a view of the lower part of the twin-arm telescopic unit on a larger scale; Figures 15 and 16 are two views of the device which monitors the tension of the pull ropes.
With reference to Figs. 1 and 2, pivoting platform 101, able to rotate more than 360 , is operated by hydraulic motor 102 with an incorporated brake; said pivoting platform is mounted on the bed of vehicle -A-. A pair of hydraulic cylinders (103) are fixed to the pivoting platform 101; the ends of the pistons of said cylinders are individually fixed to tubular elements 105 and 105a, whose base is also fixed to pivoting platform 101 constituting the first section of the twin-arm telescopic unit.
The other elements (106 and 106a, 107 and 107a, 108 and 108a, 109 and 109a) are all tubular having a cross section whose geometrical configuration is identical to elements 105 and 105a. All the elements are made of steel and have the cross section shown in Figs. 3 and 11 for the purpose of creating six (6) longitudinal corners, indicated by -S- in Fig.
11 improving the flexural strength of the entire telescopic unit -B-, when in the extended position with a load (Fig. 1).
A hydraulic cylinder 104 with a telescopic piston is fixed at the centre of a steel bridge 200 joining the two free ends of telescopic elements 109 and 109a. Two small rubber wheels 112 are used for resting the ends of arm -B- against window sills or balconies.
Trolley 120, supporting platform 119 is mounted on arm -B-; said platform includes sides hinged at its base; said sides swing 90" towards the outside of the platform until reaching a position coplanar td the platform's surface in order to facilitate manual loading operations.
Four corner jacks 113 (Fig. 1) have the purpose of stabilizing the bed of the vehicle; 114 indicates a saddle used for resting arm -Bwhen in the fully retracted position with trolley 120 and platform 119 lowered to a position above elements 105 and 105a. A motor 115 used to extend hydraulic cylinder 104 is connected to a gearbox 116. A hydraulic control module 118 is connected to the hoist controls located on the vehicle -A-. As previously described, there are two windlasses 121 and 201, both with incorporated brakes. The hoist is also equipped with a remote control 122, in addition to manual controls and a radio remote control unit.
TROLLEY 120 AND PLATFORM 119 Trolley 120 (Figs. 7,8,14) supports platform 119; said platform is articulated in the front at brackets 202 part of the trolley frame, and articulated at the rear by means of right/left threaded bolts 123 used to adjust the height of the platform. Bolts 123 can be replaced by any. and all equivalent devices such as hydrau lic or pneumatic cylinders, or other mechanisms. The sides of the trolley frame 120 have symmetric, articulated arms 124 and 125 (Figs. 3,4,5), at the ends of which are mounted flanged, frustoconical rollers tangent to the lower surface and outer sides of the two corresponding telescopic elements. Analogous rollers 128 and 129 are mounted on arms (Figs. 3 and 4) and are tangent to the lower surface and outer sides of the same two corresponding telescopic elements.The rollers 128 and 129 are mounted on fixed shafts so that they can rotate freely, but cannot move axially; the other pair of upper rollers and the two pairs of lower rollers are mounted on corresponding shafts between coil springs 130; said springs exert pressure against the flange of each roller and the part of the trolley where the shaft is fixed; said rollers are idler rollers. All the shafts of the four pairs of rollers may be equipped with springs 130. Arms 124 and 125 are articulated at 132 with braces 203, which in turn are articulated at 1 32a with symmetrical arms 204 located on the sides of trolley 120.Arms 204 are connected to a transverse rod 205 (Figs. 7 and 8), which turns on its axis and with respect to the frame of said trolley; said transverse rod is equipped with a bracket and pin 206, the centre of which engages forked lever 207; said lever is articulated with rod 208, parallel to rod 205, which rotates with respect to trolley 120. Spiral spring 209 is mounted coaxial to rod 208; said spring is wound and fixed to the frame of the trolley exerting force in the direction shown by the arrows in Fig. 8.
The continuous adherence of rollers 126 and 127 to the rolling surface of the corresponding telescopic elements is assured by the action of steel ropes 131 (Figs. 6,7,8); one end of said ropes are fixed to the brackets on rod 208. The opposite end of said ropes are attached via drive pulleys 211, 212 and 213 on the trolley and 137, located at the top of twin-arms -B- of the telescopic elements to windlass 121 (Figs. 1,6).
TOOTHED WHEELS HAVING THE PURPOSE OF SYNCHRONISING THE MOVEMENT OF THE TELESCOPIC ELEMENTS With reference to Figs. 2 and 10, a shelf 140 is located at the top of each telescopic element of arm -B-; the symmetric shelves of each telescopic element supports a rotating shaft 141; a pair of toothed wheels 142 are integral with said rotating shaft 141. Said pair of toothed wheels are supported by shelf 140 (Fig. 2), integral with base telescopic elements 105 and 105a, and positioned so that teeth 143 engage notches 150 in the surface of said elements 105 and 105a, which face said toothed wheels. All the other telescopic elements of arm -B- are designed in the same manner, except terminal elements 109 and 109a containing wheels 112, or other equivalent devices, used for resting the twin-arm telescopic unit.The distance between successive teeth of each wheel 142 and the distance between notches is such that the pair of symmetric teeth of each pair of toothed wheels begin to engage the next notch before the pair of teeth preceding them are completely free of the notch in which they are engaged.
This configuration has the purpose of creating a sequential, continuous meshing avoiding slippage between the telescopic elements. Pairs of toothed wheels 142 mesh with the telescopic elements assuring a smooth, synchronised longitudinal movement of said elements, both during extension and retraction of twinarm telescopic unit -B- avoiding jamming.
SECOND WINDLASS In accordance with the improvement of the hoisting machine, said machine is equipped with a second windlass 201 (Fig. 1) which winds and pays out a steel rope 220, one end of which is attached to the drum of the windlass, passes through pulley 221 and is then fixed to the base of the machine.
Two sliding extensions 234 are mounted on elements 105 and 105a of twin-arm telescopic unit -B- (Fig. 14) for the purpose described below.
MACHINE OPERATION After vehicle -A- has been positioned where the hoisting machine will be used, two hydraulic cylinders 103 are activated to set the angle of twin-arm telescopic unit -B-. The drums of the two windlasses 121 and 201 are released in order to wind ropes 131 and 200 without moving trolley 120 and work platform as pivoting grips 232 (Fig. 14) are attached to the rear cross member of trolley 120. Cylinder .104 is acitivated extending arm -B- smoothly thanks to the presence of toothed wheels 142; the twin-arm telescopic unit can be stopped at any height between the maximum and minimum. Once the desired height is reached, windlass 201 is locked and hydraulic cylinder 104 is pressurised. Finally, windlass 121, which moves trolley 120, is activated transporting said trolley and platform 119 to the desired height.The stability of twin-arm telescopic unit -B- under laden conditions is guaranteed by the tension created by hydraulic cylinder 201 against the reaction of rope 220 and windlass 201.
It is important to note that both the upper ends of arm -B- contain electric sensors, allowing the electric motor to activate windlass 121 only when said upper ends are resting against a fixed object. If only one of the two ends of said arm are not resting against said fixed object, windlass 121 cannot be activated.
During loading and unloading of platform 119 in the lowered position, extensions 234 are in the extended position; when the machine is not being used, said extensions are retracted along elements 105 and 105a and are held in place by setscrews 233 and chains 235, which engage hooks 231.
With reference to Figs. 15 and 16, pull cords 131 run, with a minimum of angular movement, along the outside of bar 237 supported by a pivoting mechanism 237a, preferably positioned near windlass 121. Said mechanism 237a is held under tension by spring 238, while the force exerted by the ropes acts in the opposite direction. If there is any slack in said ropes for any reason whatsoever, spring 238 retracts mechanism 237a to the position shown in Fig. 16 causing tooth 240 to trip switch 239 connected to a solenoid valve, instantly draining the hydraulic fluid flowing into cylinder 104 and completely stopping all movement of the hoisting machine.
The structural characteristics of the machine, its versatility and reliability make it suitable for numerous uses. In addition to loading and unloading, the hoist can be used for the emergency evacuation of people and objects from the upper floors of tall buildings.
As previously mentioned, the machine is equipped with manual and remote controls 122, which can be used from the ground level; a radio remote control unit can also be used from a distance. The platform has four controls enabling the operator to manoeuver it.

Claims (11)

1. Improvement of a transportable hoisting machine mounted on a pivoting platform comprising a twin-arm telescopic unit made up to two telescopic rails; the corresponding telescopic elements being joined transversely and being extensible longitudinally at the same time and in the same measure by means of appropriate mechanisms; said twin arm being longitudinally extensible by means of a singleacting telescopic hydraulic cylinder; a trolley with a platform being mounted on said twin arm and moved by means of steel ropes connected to a windlass; said trolley being equipped with four pairs of flanged, fructoconical rollers on either side of the arms; said flanges being held against the sides of the telescopic rails by means of elastic devices; said rollers being supported by the symmetrical, lateral structure of the trolley frame comprising levers having a pantograph-type articulation, and having the purpose-of maintaining the rollers against the rolling surface of the twin-arm telescopic unit; said machine also being equipped with a second windlass with an incorporated brake having a steel rope having the purpose of locking twin arm at any desired height allowing the pressurisation of a telescopic hydraulic cylinder to stabilise said arm when the trolley is laden; said trolley also being equipped with an automatic emergency brake and a device able to stop all machine operations if any slack is detected in the ropes.
2. Improvement of a transportable hoisting machine as claimed in claim 1, in which the sequential extension and retraction of the telescopic elements is controlled by pairs of toothed wheels integral with each other, which are positioned at the top of each telescopic element; the teeth of said wheels mesh with corresponding notches in the surface facing said wheels of the different telescopic elements.
3. Improvement of a transportable twinarm hoisting machine as claimed in claim 1, in which said machine comprises three telescopic cylinders; one of said cylinders capable of extending twin arm; two of said cylinders being used to stabilise the angle of said arm.
4. Improved hoisting machine as claimed in claim 1, in which said machine comprises a trolley with a platform supported by four pairs of rollers mounted on opposite sides of each rail of a twin-arm telescopic unit, supported in turn by levers having a pantograph-type articulation, and moved by the action of a rod joined to a second rod, in turn being connected to steel ropes driven by a windlass.
5. Improved hoisting machine as claimed in claim 1, in which the trolley frame comprises a transverse rotating rod; there is a pair of knurled cams at each end of said rod in corre spondence with the rolling surface of the upper trolley rollers; elastic devices tend to force the cams against the rolling surface of said rollers; said rod also comprises a bracket for anchbring the ends of ropes 131, whose opposite ends are attached to a windlass having the purpose of moving the trolley along the twin arm.
6. Improved hoisting machine as claimed in claim 1, in which the adherence of the pairs of rollers against the rolling surface is assured by the pulling action of the ropes and the reaction of elastic devices.
7. Improved hoisting machine as claimed in claim 1, in which said machine comprises two windlasses; one of said windlasses having the purpose of moving the trolley by means of two steel ropes activating the retraction of the twin-arm telescopic unit and telescopic cylinder, the second said windlass drives a sirigle rope pressurising a telescopic cylinder.
8. Improved hoisting machine as claimed in claim 1, in which sliding extensions are mounted on the outside of the base telescopic elements having the purpose of resting against the ground allowing the trolley and platform to be lowered; said extensions are brought into the resting position by the movement of said trolley, and then hooked to said trolley and locked in place.
9. Improved hoisting machine as claimed in claim 1, in which said machine is equipped with a switch capable of automatically stopping all machine operations; said switched is tripped whenever there is any slack in the steel ropes connected to windlasses in operation.
10. Improved hoisting machine as claimed in claims 1 to 9, in which said machine is equipped with manual controls, controls on the platform, remote control and a radio remote control unit.
11. A transportable hoisting machine, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB8619629A 1985-09-02 1986-08-12 Improvement of a transportable platform hoist with a twin telescopic arm Expired GB2179915B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT67746/85A IT1183935B (en) 1985-09-02 1985-09-02 SELF-TRANSPORTABLE LIFT WITH TWIN TELESCOPIC ARM
IT6746886A IT1189694B (en) 1986-06-06 1986-06-06 Vehicle mounted load raising hoist on telescopic guide

Publications (3)

Publication Number Publication Date
GB8619629D0 GB8619629D0 (en) 1986-09-24
GB2179915A true GB2179915A (en) 1987-03-18
GB2179915B GB2179915B (en) 1989-11-08

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ID=26329781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8619629A Expired GB2179915B (en) 1985-09-02 1986-08-12 Improvement of a transportable platform hoist with a twin telescopic arm

Country Status (7)

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CH (1) CH670623A5 (en)
DE (1) DE3625876A1 (en)
FR (1) FR2586667B1 (en)
GB (1) GB2179915B (en)
GR (1) GR862170B (en)
NL (1) NL8602207A (en)
PT (1) PT83167B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317782A1 (en) * 1987-11-23 1989-05-31 Albert Böcker GmbH &amp; Co. KG Inclined lift, in particular a goods and/or passenger lift
WO1997032106A1 (en) * 1996-03-01 1997-09-04 Anton Holzinger Load transporter for an inclined goods lift
CN103264941A (en) * 2013-06-06 2013-08-28 湖南海诺电梯有限公司 Emergency rescue control system with lifting platform driven by double motors
CN109534246A (en) * 2018-11-30 2019-03-29 武汉博莱恩智能装备有限公司 A kind of hoistable platform of fall arrest

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3717661C1 (en) * 1987-05-26 1988-11-03 Andernach Kg A W Inclined hoist
CN108046082B (en) * 2017-12-12 2019-10-01 中国矿业大学 Deep vertical large-tonnage hoisting container Multipoint synchronous braking system and its working method

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Publication number Priority date Publication date Assignee Title
DE7234878U (en) * 1900-01-01 Henkel E Kg
DE1064222B (en) * 1955-03-24 1959-08-27 Emile Haemmerlin Freight elevator
FR2038496A5 (en) * 1969-03-20 1971-01-08 Bron Jean
DE2328990C3 (en) * 1973-06-07 1980-05-14 Magirus-Deutz Ag, 7900 Ulm
US4183423A (en) * 1976-08-12 1980-01-15 Lewis James P Ladder hoist
DE2704949A1 (en) * 1977-02-07 1978-08-24 Friedrichs Ingo H Building material lifting machine - has skip moved along adjustable ramp by winch rope with safety brake on drum
DE2903923C2 (en) * 1979-02-02 1981-04-09 Theodor 4712 Werne De Klaas
DE3038999A1 (en) * 1979-10-19 1981-04-30 Finn Load lifting mechanism used against side of building - comprises lightweight portable hoist detachable from supporting ladder
DE3272023D1 (en) * 1981-09-23 1986-08-21 Boecker Albert Gmbh & Co Kg Telescopic jib, in particular for inclined lifts
DE3222508C2 (en) * 1982-06-16 1986-05-15 Albert Boecker Gmbh & Co Kg, 4712 Werne, De
EP0281044B1 (en) * 1984-05-01 1991-01-16 Kabushiki Kaisha Hikoma Seisakusho Elevating apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317782A1 (en) * 1987-11-23 1989-05-31 Albert Böcker GmbH &amp; Co. KG Inclined lift, in particular a goods and/or passenger lift
WO1997032106A1 (en) * 1996-03-01 1997-09-04 Anton Holzinger Load transporter for an inclined goods lift
CN103264941A (en) * 2013-06-06 2013-08-28 湖南海诺电梯有限公司 Emergency rescue control system with lifting platform driven by double motors
CN103264941B (en) * 2013-06-06 2015-07-01 湖南海诺电梯有限公司 Emergency rescue control system with lifting platform driven by double motors
CN109534246A (en) * 2018-11-30 2019-03-29 武汉博莱恩智能装备有限公司 A kind of hoistable platform of fall arrest

Also Published As

Publication number Publication date
GB2179915B (en) 1989-11-08
NL8602207A (en) 1987-04-01
FR2586667B1 (en) 1990-11-30
GR862170B (en) 1986-12-31
GB8619629D0 (en) 1986-09-24
CH670623A5 (en) 1989-06-30
FR2586667A1 (en) 1987-03-06
DE3625876A1 (en) 1987-03-05
PT83167A (en) 1987-02-27
PT83167B (en) 1994-10-31

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940812