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
  • B66F11/048—Mobile camera platform
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
  • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
  • F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
  • F16M13/00—Other supports for positioning apparatus or articles; Means for steadying hand-held apparatus or articles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
  • F16M2200/00—Details of stands or supports
  • F16M2200/04—Balancing means

Definitions

• the present invention relates to a camera support device comprising a track in the form of a box girder and a chariot movable along said girder and supporting the camera.
• the chariot is over an endless wire, running over pulleys at the girder ends, in sucn a way connected to a counterweight movable inside the girder that, upon change in either direction of the camera position rela ⁇ tively the longitudinal centre of the track, the counter ⁇ weight are displaced in the opposite direction. In that way the track along with the camera chariot and the counter ⁇ weight is maintained statically a balanced relatively the centre of the girder which is there mounted on a tripod-
• the box girder is generally manufactured by extrusion from an aluminum alloy which results in relatively large dimen- sion tolerances.
• a typical distance between each pair of mutually opposite girder walls is about 70 mm. However, that distance may deviate from nominal figure by a tole ⁇ rance of -0.5 mm.
• the box girder In order for an equipment of this type to be as versatile as possible it must allow the camera to be positioned in three dimensions. In other words, the box girder must be rotatable in a horizontal plane, tiltable around a central horizontal axis and finally rotatable about its longitudinal axis.
• the wheels of the counterweight unit in order to offer a soft and noiseless movement must consist of a relatively soft plastic material. It should be inserted here that this unit, which obviously must have the same weight as that of the camera chariot including the weight of the camera, may weigh up to 18 kgs.
• this unit When the device is not in use, it is stored in a horizontal position. This means that due to the high surface pressure the soft wheels may at their surfaces in contact with the inner wall of the box girder be deformed to non-circular form. Even if this deformation is theoretically elastic, the practical con ⁇ ditions are such that it takes an unacceptably long time, about 3-4 hours, before the wheels have resumed their circular shape. For that reason the girder is to be stored upside-down.
• the counterweight has at least three pairs of wheels, the two wheels in each pair being located adjacent the ends of their common shaft and a spring urging them apart and that the wheels are arranged to perform a rolling movement in contact with the inner wall of the girder on the one hand with the envelope surfaces contacting the horizontal walls of the girder and, on the other, their obliquely, preferably at 45 , tapered corner portions, contacting the girder corner portions parallel therewith.
• Reference numeral 1 is the box girder which in the pre ⁇ sent example is of substantially square profile and at each of its four corners has external profile rims 2 and 3.
• the upper rims 2 are intended to serve as mountings for the rails of the camera chariot whereas the lower rims 3 are arranged to receive one or more mounting plates which in turn are attached to tripods.
• the coun ⁇ terweight, not shown here, is inside a housing 4 at the same time serving as the chassis of the counterweight unit. It has upper and lower wheel pairs. The drawing shows one upper and one lower pair of wheels, the two wheels on the right hand side being shown in cross- section.
• the lower pair of wheels consists of two wheels 5 and 6 mounted on a common shaft 7. This has an axial bore re ⁇ ceiving a pressure spring 8 which over a ball 9 exerts a pressure against the lateral wall of the wheel 6. Con ⁇ sequently, the spring tends to keep wheels 5 and 6 apart from each other in the axial direction.
• each wheel is shaped like a relatively wide, cylindrical roller, the external corner of which is tapered, in this example with a taper of about 45 .
• the tapered portion has been designated 10.
• the upper wheel pair is designed in much the same way, the only difference being that, as has already been mentioned. there is a clearance between the envelope surfaces of the upper wheels and the adjacent interior wall of the box girder.
• each counterweight chariot does normally have two more pairs of lower wheels.
• spring 8 urges wheels 5 and 6 axially apart whereby they will on the one hand with their envelope surfaces contact the inner wall 11 of the lower part of the girder and, on the other, have their tapered corner portions in con ⁇ tact with a parallel girder wall surface 12. In this position the upper wheels are out of contact with the ceiling of the box girder.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Structural Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Conveying And Assembling Of Building Elements In Situ (AREA)
• Handcart (AREA)
• Bridges Or Land Bridges (AREA)
• Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20377404

Family Applications (1)

Country Status (3)

Cited By (1)

Citations (3)

• 1989
  • 1989-11-07 SE SE8903727A patent/SE463889B/sv not_active IP Right Cessation
• 1990
  • 1990-11-07 EP EP90916842A patent/EP0534968A1/en not_active Withdrawn
  • 1990-11-07 WO PCT/SE1990/000724 patent/WO1991006802A1/en not_active Application Discontinuation

Patent Citations (3)

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