EP0464290A1 - Fahrbare Hebebühne, welche einen Träger für eine Kamera bildet - Google Patents

Fahrbare Hebebühne, welche einen Träger für eine Kamera bildet Download PDF

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Publication number
EP0464290A1
EP0464290A1 EP90401916A EP90401916A EP0464290A1 EP 0464290 A1 EP0464290 A1 EP 0464290A1 EP 90401916 A EP90401916 A EP 90401916A EP 90401916 A EP90401916 A EP 90401916A EP 0464290 A1 EP0464290 A1 EP 0464290A1
Authority
EP
European Patent Office
Prior art keywords
pentograph
lifting platform
control unit
hydraulic control
platform according
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.)
Withdrawn
Application number
EP90401916A
Other languages
English (en)
French (fr)
Inventor
Roland Sauzet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
Original Assignee
MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
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
Application filed by MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE) filed Critical MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
Publication of EP0464290A1 publication Critical patent/EP0464290A1/de
Withdrawn legal-status Critical Current

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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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0691—Asymmetric linkages, i.e. Y-configuration
    • 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
    • B66F11/048—Mobile camera platform
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0625—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • the present invention relates to a mobile lifting platform, commonly called “dolly", which serves as a support for a film or video camera and which is used worldwide for all audio-visual productions.
  • This platform moves in rotation (for the realization of tracking shots) while having the possibility of raising or lowering the camera that it carries as high and as low as possible.
  • Pushed by a machinist the platform moves on regular floors using rubber tires, but it can also roll on rails with twin wheels or by adding a bogie accessory.
  • elevating platforms called telescopic column, that is to say comprising a vertical telescopic column whose upper element has a support for the camera and a seat for the operator, the extension and the column retraction being controlled hydraulically or electrically.
  • This type of lifting platform has major drawbacks, so that the speed of rise of the column is not fast enough and does not allow for example to reach the speed of movement of a man who gets up from 'a chair constituting the reference speed in the matter.
  • Another major disadvantage is that, when the column is at the bottom of its travel, the axis of the camera it carries is sometimes placed too high which prohibits filming from certain angles scenes taking place at ground level. .
  • So-called pentograph lifting platforms are also known, in which the elevation movement is provided by articulated arms in the form of a pentograph. These platforms benefit from a good notoriety because of the speeds of ascent and descent that they allow, as well as because of the very low position of the optical axis of the camera that they allow.
  • the pentograph elevating platforms have the disadvantage of a great lack of operator comfort in the case of horizontal and vertical panoramic movements, since the latter cannot follow the camera in the upward movements. and lowering it, and also cannot rotate with it.
  • the object of the present invention is to remedy the drawbacks presented by the known lifting platforms mentioned above and, to this end, to provide a mobile lifting platform which, while ensuring rapid vertical movement of the camera, by allowing the operator to follow the camera as well in the movements of raising and lowering of it as during its rotation, and by authorizing a descent in the camera in a very low position, is of a particularly simple use and rational.
  • the lifting platform and constituted by the association of four main parts, comprising a support plate for the camera and the operators, a device for lifting the plate taking the form of a pentograph, a hydraulic assembly comprising the means for controlling the movement of extension and retraction of the pentograph, and a mobile chassis intended to support the other three parts and to ensure the movement of the lifting platform.
  • the different parts mentioned above of the platform according to the invention are connected to each other by quick assembly elements that do not require a tool, so that the assembly or separation of said parts can be perform very simply and very quickly.
  • One can for example disassemble, from the movable chassis, the assembly constituted by the pentograph, the hydraulic control assembly and the plate to thus dispose this assembly on a vehicle if the shooting conditions require it.
  • the pentograph has no movable support at its lower front part, the latter being replaced by a telescopic column connected to a posterior intermediate articulation of the pentograph.
  • This arrangement advantageously makes it possible to release, from the support structure necessary in a traditional pentograph system, the zone situated under the front of the plate and, as the front wheels of the mobile chassis generally occupy a remote position, the door false thus created makes it possible to adopt an advantageous overhanging position in certain use cases, for example to get as close as possible to certain platforms.
  • the lower arm of the pentograph is articulated to the lower front part of the hydraulic control assembly, and the upper ends of the pentograph are provided with one of the rollers moving in slides from the front of the plate and the other with yokes. hinged at the back of it.
  • the force required to extend and retract the pentograph is provided on each side by a hydraulic cylinder acting on the lower arm of the pentograph via two links. One is articulated at one of its ends on the hydraulic assembly, while the other is connected to the lower arm. The second end of each link pivots on a common axis, on which the movable yoke of the jack is supported. This arrangement has the effect of creating a variable ratio reduction.
  • the plate advantageously made of light alloy, is coated on its upper face with an anti-slip material.
  • an anti-slip material In its center it has a rotating element designed to receive, for a 360 ° rotation, a support intended to receive the camera and one or two operators.
  • the hydraulic control assembly includes all the elements necessary for the supply of power and its use. It consists of a chassis incorporating a hydraulic fluid reservoir, and it supports the rotation shaft of the pentograph, the guide column, and the upper anchoring of the cylinders. A motor pump attached directly to the tank supplies hydraulic accumulators which store the energy necessary for the cylinders. Electrical and electronic means control the operation of the lifting platform, these means possibly comprising a programmable set point generator making it possible to compose all forms of up and down movements, and a memory for instantaneous recording of movements. Manual control means can also be provided.
  • a mobile chassis made of light alloy, which rests on the ground by a train of front steered wheels 2 and by a train of rear steered wheels 3.
  • a double steering system 4 allows either a opposite steering of the front and rear axles for on-site pivoting, i.e. a parallel orientation of the four wheels, on 360 ⁇ , for diagonal and transverse movements.
  • the steering box is designed to be removable so that it can be easily replaced by other controls offering different steering characteristics.
  • the front track of the chassis can be increased by 40 cm to ensure, when necessary, greater stability to the assembly.
  • Each wheel 2, 3 is provided with a disc brake, the disc being fixed to the core of the wheel while the piston, providing the braking force, is integral with the wheel stub.
  • a hydraulic control assembly 5 On the chassis 1 is fixed, at its rear part, a hydraulic control assembly 5.
  • This connection, as well as those existing between the hydraulic control assembly 5 and the pentograph 6, as well as between the pentograph 6 and the plate 7 are produced by means of quick-release pins requiring no tools, as shown in FIG. 5.
  • the hydraulic control assembly 5 is constituted by a light alloy chassis, having at its lower front end bearings 8 receiving a transverse shaft 9. On each end of the shaft 9 is articulated, near its bent rear end, the lower arm 10 of a pentograph 6. The latter has no movable support in the lower front part, this being replaced by a telescopic column 11 carried by the hydraulic control assembly 5 and connected to its lower part by the 'rear intermediate articulation 12 of the lower half-arm 13.
  • the upper end of an upper arm 14 has rollers 15 moving in a lateral slide of the support plate 7, while the upper end of the other upper arm 16 of the pentograph is provided with a yoke 17 articulated at the rear of the plate 7.
  • the plate 7 made of lightly ribbed light alloy at the bottom, is coated with a non-slip material. It has at its front part two slides in which the rollers 15 move and, at its rear part, bearings cooperating by means of removable pins with the yokes 17. At the center of the plate 7 is fixed a rotary element 18, allowing 360 ° pivoting, on which is intended to fix a support (not shown) receiving the camera equipment and operators.
  • the bent rear end of the lower arm 10 is connected, by an articulated link 19, to a yoke 20 carried by the rod 21 of a hydraulic cylinder 22 whose end, on the cylinder side, is articulated at 23 to the upper part of the hydraulic control assembly 5.
  • Another link 24 is articulated at one end on the yoke 21 and, at its opposite end, at a fixed point 25 of the hydraulic control assembly 5.
  • the mobile lifting platform thus produced can move vertically at a speed of the order of 50 cm / s, and the reference surface of its platform 7 varies between 0.26 m (low position) and 1.65 m ( high position) in relation to the ground.
  • FIG. 5 there is shown by way of example, applied to the connection of the pentograph arm 10 with the control rod 19, a quick assembly device according to the invention.
  • the axis 29 of articulated connection between the arm 10 and the link 19 is immobilized by means of a pin 30 internally comprising a plunger 31 which passes through the link 19 and engages in an opening of the axis 29.
  • the plunger 31 controls, at rest, the radial outlet of the balls 32 preventing the pin from being removed.
  • a simple push on an external extension 33 of the plunger 31 ensures the erasure of the balls 32 by allowing easy removal of the spindle, therefore the extraction of the pin 29 and the rapid disassembly of the elements 10 and 19.
  • the plate 7 being in its low position shown in FIGS. 1 and 4, the control of the supply of the jacks 22 causes the rods 21 to come out of these jacks and the rotation of the rods 24 counterclockwise around the joints 23. Due to this rotation, a traction is applied to the bent end of the lower arms 10 which causes a clockwise rotation of the arms 10 around the shaft 9 ensuring the extension of the pentographs 6 and the elevation of the plate 7 guided vertically by the telescopic column 11.
  • FIG. 2 it is understood that the absence of lower movable support for the pentographs 6 makes it possible to approach very close to obstacles of low height, such as platforms for example, the platform 7 then overhanging these obstacles in a way that may be advantageous in certain cases of use.
  • the mobile assembly 1, the assembly constituted by the hydraulic control assembly 5, the pentograph 6 and the plate 7, can be separated very simply and without tools. thus disassembled can then be used for example on a vehicle, in the case where this kind of shooting is to be carried out.
  • the frame 1 can for its part be used with a conventional fixed plate.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
EP90401916A 1989-04-11 1990-07-03 Fahrbare Hebebühne, welche einen Träger für eine Kamera bildet Withdrawn EP0464290A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8904712A FR2645521B1 (fr) 1989-04-11 1989-04-11 Plate-forme elevatrice mobile constituant un support pour une camera

Publications (1)

Publication Number Publication Date
EP0464290A1 true EP0464290A1 (de) 1992-01-08

Family

ID=9380562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401916A Withdrawn EP0464290A1 (de) 1989-04-11 1990-07-03 Fahrbare Hebebühne, welche einen Träger für eine Kamera bildet

Country Status (2)

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EP (1) EP0464290A1 (de)
FR (1) FR2645521B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831054A2 (de) * 1996-09-19 1998-03-25 MBB Förder- und Hebesysteme GmbH Hubvorrichtung, insbesondere Scherenbühne
GB2323073A (en) * 1997-03-12 1998-09-16 Michael Robert Holmes A collapsible tower
EP2277819A1 (de) * 2009-07-23 2011-01-26 Waldner Labor- und Schuleinrichtungen GmbH Scherenhubvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645521B1 (fr) * 1989-04-11 1991-06-21 Movietech Plate-forme elevatrice mobile constituant un support pour une camera

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
FR974048A (fr) * 1941-11-25 1951-02-16 Pied-chariot pour appareils cinématographiques de prise de vues
DE1120096B (de) * 1959-03-17 1961-12-21 Ind Technik M B H Ges Schwenkhebebuehne
US3024738A (en) * 1961-04-04 1962-03-13 Phil J O'toole Mobile, collapsible display device
FR1413813A (fr) * 1964-11-18 1965-10-08 Trepel K G Maschinenfabrik Cric roulant
FR1479687A (fr) * 1966-05-10 1967-05-05 élévateur, notamment pour appareil de prises de vues ou similaires
DE2541895A1 (de) * 1975-09-19 1977-03-24 Sante Zelli Fahrbare buehne mit schwenkbaren und lenkbaren raedern und mit ausgleich des lenkwinkels der lenkraeder, insbesondere fuer fernsehaufnahmegeraete
FR2554800A1 (fr) * 1983-11-10 1985-05-17 Grange Roger Autocam, plate-forme automatisee de prises de vues cinema-video
EP0174709A1 (de) * 1984-09-11 1986-03-19 Hanaoka Sharyo Co., Ltd. Hebewagen
EP0329346A1 (de) * 1988-02-19 1989-08-23 Vinten Broadcast Limited In der Höhe verstellbare Plattformen
FR2645521A1 (fr) * 1989-04-11 1990-10-12 Movietech Plate-forme elevatrice mobile constituant un support pour une camera

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4221280A (en) * 1978-05-05 1980-09-09 Advance Lifts, Incorporated Bi-elevational platform lift

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR974048A (fr) * 1941-11-25 1951-02-16 Pied-chariot pour appareils cinématographiques de prise de vues
US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
DE1120096B (de) * 1959-03-17 1961-12-21 Ind Technik M B H Ges Schwenkhebebuehne
US3024738A (en) * 1961-04-04 1962-03-13 Phil J O'toole Mobile, collapsible display device
FR1413813A (fr) * 1964-11-18 1965-10-08 Trepel K G Maschinenfabrik Cric roulant
FR1479687A (fr) * 1966-05-10 1967-05-05 élévateur, notamment pour appareil de prises de vues ou similaires
DE2541895A1 (de) * 1975-09-19 1977-03-24 Sante Zelli Fahrbare buehne mit schwenkbaren und lenkbaren raedern und mit ausgleich des lenkwinkels der lenkraeder, insbesondere fuer fernsehaufnahmegeraete
FR2554800A1 (fr) * 1983-11-10 1985-05-17 Grange Roger Autocam, plate-forme automatisee de prises de vues cinema-video
EP0174709A1 (de) * 1984-09-11 1986-03-19 Hanaoka Sharyo Co., Ltd. Hebewagen
EP0329346A1 (de) * 1988-02-19 1989-08-23 Vinten Broadcast Limited In der Höhe verstellbare Plattformen
FR2645521A1 (fr) * 1989-04-11 1990-10-12 Movietech Plate-forme elevatrice mobile constituant un support pour une camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831054A2 (de) * 1996-09-19 1998-03-25 MBB Förder- und Hebesysteme GmbH Hubvorrichtung, insbesondere Scherenbühne
EP0831054A3 (de) * 1996-09-19 1999-06-16 MBB Förder- und Hebesysteme GmbH Hubvorrichtung, insbesondere Scherenbühne
GB2323073A (en) * 1997-03-12 1998-09-16 Michael Robert Holmes A collapsible tower
EP2277819A1 (de) * 2009-07-23 2011-01-26 Waldner Labor- und Schuleinrichtungen GmbH Scherenhubvorrichtung

Also Published As

Publication number Publication date
FR2645521B1 (fr) 1991-06-21
FR2645521A1 (fr) 1990-10-12

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