WO2016079072A1 - Device for fluid friction handling of video or picture acquisition means - Google Patents

Device for fluid friction handling of video or picture acquisition means Download PDF

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Publication number
WO2016079072A1
WO2016079072A1 PCT/EP2015/076722 EP2015076722W WO2016079072A1 WO 2016079072 A1 WO2016079072 A1 WO 2016079072A1 EP 2015076722 W EP2015076722 W EP 2015076722W WO 2016079072 A1 WO2016079072 A1 WO 2016079072A1
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WO
WIPO (PCT)
Prior art keywords
trolley
abutment
wheel
rolling
matching surface
Prior art date
Application number
PCT/EP2015/076722
Other languages
French (fr)
Inventor
Andrea FALCUCCI
Original Assignee
Smartsystem S.R.L. Unipersonale
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 Smartsystem S.R.L. Unipersonale filed Critical Smartsystem S.R.L. Unipersonale
Publication of WO2016079072A1 publication Critical patent/WO2016079072A1/en

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Classifications

    • 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
    • F16M11/425—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 along guiding means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/56—Accessories
    • G03B17/561—Support related camera accessories

Definitions

  • the present invention relates to the field concerning the handling of video equipment, such as television cameras, video cameras, cameras, and the like, during the shooting and in particular relates to a device for handling video or picture acquisition means.
  • video equipment such as television cameras, video cameras, cameras, and the like
  • the advent of more and more light cameras has led the industry of accessories for film and photography to create linear handling devices that are more portable and of compact size.
  • linear handling devices called slider in technical jargon
  • slider are essentially common linear handling trolley movable along respective guides and to which the user can fix the camera, video camera or camera equipment, through interposed equipment such as video heads, photographic heads or other (fixed or mobile) adjustable supports.
  • the trolley guide can be constrained or not to other inertial or not inertial structures.
  • the trolley can move along its own guide by coupling elements that operate through sliding friction (dry or self-lubricating bearings) or by rolling friction (bearings, wheels, ball recirculating bushings). All these known devices, allow the handling of the mobile element, with a fluidity dependent on the quality and on the type of technology used (brushing, rolling, recirculating ball).
  • the entity of the load applied to the trolley and the technology used greatly influence both the force required to put in motion the trolley and the control of the same during the acceleration, deceleration and constant movement phases. It is not possible to ensure a control of the motion smoothness as it is not currently possible to guarantee a constant control over the entire stroke of the movable element.
  • a drawback of such known devices consists in that they are not able to ensure the necessary fluidity of motion and constancy of such fluidity during the sliding of the trolley along the entire guide.
  • Other drawback consists in that, due to the static friction, the start of the trolley during the shooting may be too rough.
  • One object of the present invention is to propose a device for the handling of video or picture acquisition means capable of ensuring a fluid and soft motion.
  • Another object is to propose a device able to avoid abrupt starting of the truck and to allow regular and fluids slowdowns and arrests also during the shots.
  • Other object is to propose a device capable of ensuring a handling of the video or picture acquisition means subject to viscous friction, or in other word to fluid friction due to a fluid operating into the device, of predeterminable as desired and/or adjustable intensity, and to reduce or eliminate the differences between static and dynamic friction so that the force required to overcome the static friction is not excessive and does not cause uncontrolled accelerations of light and very light video or picture equipment currently in use.
  • Further object is to propose a device which allows the adjustment of the fluid sliding friction of the trolley along the guide.
  • Other object is to propose a device nearly insensitive to the environmental conditions, even in case of rain and/or dusty environments.
  • figure 1 shows a top view of the device for handling video or picture acquisition means, object of the present invention, in which the trolley is in a median position along the guide;
  • FIGS. 2 and 3 illustrate partial, enlarged sectional views, according to plans II - H and III - III of Figure 1;
  • numeral 1 indicates the device for handling video or picture acquisition means, such as video cameras or cameras, object of the present invention comprising a guide means 3, trolley means 5 assigned to slide along the guide means 3 and to support and move video or picture acquisition means.
  • the trolley means 5 is provided with at least a rolling means 7 each comprising one or more wheel means 9 engaged in rolling manner in abutment with the guide means 3 for the translation along the latter 3 of the trolley means 5.
  • At least one wheel means 9 of at least one of the rolling means 7 comprises at least a first abutment surface 12 connected to said wheel means 9 or made in the latter 9.
  • Said trolley means 5 carries a sliding abutment means 14 having a second abutment surface 16 sliding on the first abutment surface 12.
  • the rolling abutment of the at least one wheel means 9 provided with the first abutment surface 12 along such guide means 3 rotates said wheel means 9 and, with it 9, the first abutment surface 12 on which 12 drags the second abutment surface 16 and making a dynamic friction that is opposed to the translation of the trolley means 5 along the guide means.
  • At least one of the first 12 and/or of the second 16 abutment surfaces is provided with a viscous fluid by means of their recesses or dispensers or through at least one container for such a fluid.
  • a viscous fluid of predeterminable kind and replaceable or renewable in the course of the operating life of the device allows to reduce or to eliminate the difference between static and dynamic friction of the trolley and it provides said fluid friction.
  • the guide means 3 of the embodiment in object and illustrated in Figures 1 - 3, has two parallel rails and the corresponding trolley means is provided with a pair of rolling means rolling along a rail and a third rolling means rolling along the other rail.
  • Each rolling means is provided with a single respective wheel means.
  • the three wheel means are placed between the rails whose cross-sections are elongated, for example oval shaped, and accordingly bent towards the trolley means. In this way it is always guaranteed the abutment of the wheel means with the rails and are minimized the deflections, even with loads of highly relevant both in case of horizontal orientation of the guide means and in case of inclination of the latter.
  • the abutment surface 12 is associated with the wheel means of the third rolling mean.
  • the invention provides that the trolley means is equipped with any number of rolling means and that each of the latter can be equipped with any number of wheel means; furthermore it is provided that the guide means can also have a single rail and/or that the wheel means of a rolling means match the same side or opposite sides of the rail or of the rails. It is also provided that a plurality of wheel means of one or more rolling means are provided with respective abutment surface 12 each dragging in abutment with a second abutment surface 16. It is also provided that the trolley means is equipped with orientation bubble levels, and/or of a stopping brake with respect to the guide means.
  • the first abutment surface 12 is made on a side of the corresponding wheel means 9, therefore, the first abutment surface is of the same material of the wheel means.
  • the first abutment surface 12 may consist of a face of a disc-shaped element, for example a metallic or synthetic material or composite, coaxially fixed, for example by gluing or co-molding, to such side of the wheel.
  • the sliding abutment means 14 is slidingly housed in a respective seat made in the trolley means 5 parallelly to and side by side the seat of the rotation shaft of the wheel means provided with the first abutment surface, said seat outflows in front pf a first abutment surface 12 portion.
  • the second abutment surface 16 is made at the end, protruding outward the respective seat, of the sliding abutment means 14 or may be fixed to said end and can be in form of a pad.
  • the second abutment surface 16 consists of a face of an element made of nylon ®, Teflon® or the like and fixed to or made by the sliding abutment means 14.
  • the sliding abutment means 14 is pressed, in an adjustable manner, against the first abutment surface 12 by a pressure means 18 acting on it 14 in the direction of the first abutment surface 12.
  • the pressure means 18 comprises a threaded element 24 provided with manual drive wheel and engaged in a nut screw 30 or female screw, of the trolley means 5 and acting on the sliding abutment means 14 in the direction of mutual approach of the first 12 and second 16 abutment surfaces.
  • the threaded element 24 is placed laterally in respect to the trolley means and is staggered or offset with respect to the seat of the sliding abutment means and acts on one end 31 of a lever means 32 of the second kind whose opposite end 33 is pivoted to the trolley means 5 and whose median portion acts directly, on the sliding abutment means 14 by applying a force adjustable by means of the wheel and directed toward the first abutment surface.
  • the lever means 32 consists of a flexible rod which operates on the sliding abutment means in an elastic leaf spring manner.
  • the operation provides that the force of mutual abutment between the first 12 and second 16 abutment surfaces, and thus the friction between them, is adjusted by rotating the wheel of the pressure means 18.
  • Said friction due to the fluid interposed between the abutment surfaces is viscous or mixed viscous and grazing or, in absence of the fluid is grazing.
  • the type of friction can be determined, for example, thanks to the application of different types and amounts of viscous fluid depending on the requirements preferably the invention provides a type a quantity of fluid to provide the constant fluid friction in any position and environment condition.
  • the variant of the device illustrated in Figure 4 differs from the previous embodiment in that the nut screw 30 for the threaded element 24 of the pressure means 18 is made in the trolley means 5 coaxially to the seat for the sliding abutment means 14 and the threaded element 24 acts on the sliding abutment means 14 by means of a compressible elastic means 20 consisting, for example, of a helical spring operating in compression and housed in said seat for the sliding abutment means 14.
  • a compressible elastic means 20 consisting, for example, of a helical spring operating in compression and housed in said seat for the sliding abutment means 14.
  • wheel means is mounted, via rotation bearings, to its own shaft which is locked to the trolley means.
  • the variant of the device illustrated in Figure 5 differs from the previous embodiment of Figure 4 in that the sliding abutment means 14 is of cylindrical tubular shape and is coaxial with respect to the corresponding wheel means 9 and the second abutment surface 16 has the shape of a circular crown and abuts against the first abutment surface 12 having the same shape and made on one side of said wheel means 9.
  • the threaded element 24 acts on the sliding abutment means 14 by means of a transmission means 34 in the form of a cup and a plurality of compressible elastic means 20 interposed between the threaded element 24, the cup transmission means 34 and the tubular cylindrical sliding abutment means 14.
  • the variant of the device illustrated in Figure 6 differs from the previous embodiment in Figure 5 in that the nut screw 30 and the threaded element 24 are offset with respect to the axis of the wheel means and of the sliding abutment means and the threaded element acts on the cup transmission means 34 by means of an axial sliding pin provided with elastic means and operated by a lever means 32 consisting of a second kind lever similar to that of the first embodiment but preferably of rigid type.
  • the variant of the device illustrated in figure 7 differs from the preceding embodiment in Figure 6 in that the transmission means 34 and the sliding abutment means 14 are cylindrical pin shaped and are housed, together with the interposed compressible elastic means 20 in the respective seats mutually aligned and staggered with respect to the axis of the corresponding wheel means and of the respective axis.
  • the first abutment surface 12 is disk-shaped and is fixed to the free end of the rotation shaft integral with the wheel means 9 and slidably matches with the facing second abutment surface 16 having the same disk shape.
  • the second abutment surface 16 is made or fixed to the end of the sliding abutment means 14 sliding in its seat and actuated, through a compressed helical spring of the compressible elastic means 20, by means of the pressure means 18.
  • the first abutment surface 12 with the respective end of the rotation shaft integral with the wheel means 9 and the second abutment surface 16 with the respective end of the sliding abutment means 14, are housed in a chamber 44 made in the trolley means 5 and containing a fat or oil or other viscous fluid.
  • the sliding abutment means 14 and the respective seat are provided with corresponding flat faces or other means suitable to prevent the rotation of the sliding abutment means 14.
  • the trolley means may be provided with filling and discharge ducts afferent to the chamber to drain, to refill, to renew or to replace the viscous fluid contained in said chamber.
  • first and/or second abutment surfaces can be equipped with radial grooves or sub-radial, recesses and concavities, outlets of ducts passing through and flowing into the chamber and/or other means to promote or maintain a viscous fluid film, at least partial, between them.
  • the variant of Figure 9 differs from the previous embodiment in Figure 8 in that the sliding abutment means 14 is in the shape of a pin and its seat is aligned to the nut screw 30 for the threaded element 24. Said seat and nut screw are offset with respect to the rotation axis of the wheel means and the second abutment surface 16 is pad or circular shaped and acts on a side portion of the first discoidal abutment surface 12.
  • the variant of Figure 10 differs from the variant in Figure 8 in that the first abutment surface 12 may be formed or fixed to the end of a respective rotating shaft 40 connected to the rotating shaft of said wheel means 9 through gears 42 consisting, for example, of a bevel gear pair.
  • This variant allows, inter alia, to modify the rotation speed of the first discoidal abutment surface 12 in respect to that of the wheel means 9 changing the entity of the forces of viscous friction.
  • a simple variant of the invention also provides that the rotation axes of the wheel means 9 of the rolling means 7 of the trolley means and the axes of rotation of wheels further possible trolley means 5 are interconnected by annular rotation means, for example, belt or chain engaged to keyed pulleys on the axis that are integral to said wheel means and wheels.
  • each embodiment and variant can provide the adoption of fat or oil or other viscous fluid between the matching surfaces first 12 and second 16 to generate viscous friction between the wheel means and the trolley means 5.

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  • General Engineering & Computer Science (AREA)
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Abstract

A device for handling video or picture acquisition means comprises a guide means (3) for the sliding of a trolley means (5) assigned to support and handle the video or picture acquisition means. The trolley means (5) is provided with at least a rolling means (7) translating in abutment with the guide means (3). The at least one rolling means (7) comprises at least one rolling wheel means (9) in rolling abutment with the guide means (3) and it comprises at least a first matching surface(12) connected to said at least one respective wheel means (9) or made in the latter (9). Said trolley means (5) bears a sliding abutment means (14) having a second matching surface (16) dragging on the first matching surface (12). In an operation translation condition of the trolley means (5) along the guide means (3), the rolling abutment of the at least one wheel means (9) along such guide means (3) rotates said wheel means (9) and, with it (9), the first matching surface (12) on which (12) the second matching surface (16) drags realizing a dynamic friction that is opposed to the translation of the trolley means (5) along the guide means (3).

Description

DEVICE FOR FLUID FRICTION HANDLING OF VIDEO OR PICTURE ACQUISITION MEANS
DESCRIPTION
The present invention relates to the field concerning the handling of video equipment, such as television cameras, video cameras, cameras, and the like, during the shooting and in particular relates to a device for handling video or picture acquisition means. The advent of more and more light cameras has led the industry of accessories for film and photography to create linear handling devices that are more portable and of compact size.
These linear handling devices, called slider in technical jargon, are essentially common linear handling trolley movable along respective guides and to which the user can fix the camera, video camera or camera equipment, through interposed equipment such as video heads, photographic heads or other (fixed or mobile) adjustable supports.
The trolley guide can be constrained or not to other inertial or not inertial structures.
The trolley can move along its own guide by coupling elements that operate through sliding friction (dry or self-lubricating bearings) or by rolling friction (bearings, wheels, ball recirculating bushings). All these known devices, allow the handling of the mobile element, with a fluidity dependent on the quality and on the type of technology used (brushing, rolling, recirculating ball). The entity of the load applied to the trolley and the technology used greatly influence both the force required to put in motion the trolley and the control of the same during the acceleration, deceleration and constant movement phases. It is not possible to ensure a control of the motion smoothness as it is not currently possible to guarantee a constant control over the entire stroke of the movable element. A drawback of such known devices consists in that they are not able to ensure the necessary fluidity of motion and constancy of such fluidity during the sliding of the trolley along the entire guide. Other drawback consists in that, due to the static friction, the start of the trolley during the shooting may be too rough.
Other drawback of the known devices consists in that, in the attempt to render fluid the movement thereof, the devices are equipped with low friction sliding or rolling elements that render them excessively sensitive to external stresses such as, for example, the wind or even small irregularities of the applied force to them for the translation.
Further drawback of the known devices consists in that they have an excessively dependent on the load and environmental conditions behavior.
Other drawback consists in that the known devices do not allow to regulate the behavior of the trolley in the sliding along the guide.
One object of the present invention is to propose a device for the handling of video or picture acquisition means capable of ensuring a fluid and soft motion.
Other object is to propose a device able to avoid abrupt starting of the truck and to allow regular and fluids slowdowns and arrests also during the shots. Other object is to propose a device capable of ensuring a handling of the video or picture acquisition means subject to viscous friction, or in other word to fluid friction due to a fluid operating into the device, of predeterminable as desired and/or adjustable intensity, and to reduce or eliminate the differences between static and dynamic friction so that the force required to overcome the static friction is not excessive and does not cause uncontrolled accelerations of light and very light video or picture equipment currently in use. Further object is to propose a device which allows the adjustment of the fluid sliding friction of the trolley along the guide. Other object is to propose a device nearly insensitive to the environmental conditions, even in case of rain and/or dusty environments.
The characteristics of the invention are highlighted in the following with particular reference to the accompanying drawings in which: the figure 1 shows a top view of the device for handling video or picture acquisition means, object of the present invention, in which the trolley is in a median position along the guide;
the figures 2 and 3 illustrate partial, enlarged sectional views, according to plans II - H and III - III of Figure 1;
the figures 4 - 7 illustrate partial and cross-sectional views of the respective variants of the device of Figure 1;
- the figures 8 - 10 show partial and cross-sectional views of further and respective variants of the device of Figure 1.
With reference to figures 1 - 3, numeral 1 indicates the device for handling video or picture acquisition means, such as video cameras or cameras, object of the present invention comprising a guide means 3, trolley means 5 assigned to slide along the guide means 3 and to support and move video or picture acquisition means.
The trolley means 5 is provided with at least a rolling means 7 each comprising one or more wheel means 9 engaged in rolling manner in abutment with the guide means 3 for the translation along the latter 3 of the trolley means 5.
At least one wheel means 9 of at least one of the rolling means 7 comprises at least a first abutment surface 12 connected to said wheel means 9 or made in the latter 9.
Said trolley means 5 carries a sliding abutment means 14 having a second abutment surface 16 sliding on the first abutment surface 12. In an operative condition of the translation of the trolley means 5 along the guide means 3, the rolling abutment of the at least one wheel means 9 provided with the first abutment surface 12 along such guide means 3 rotates said wheel means 9 and, with it 9, the first abutment surface 12 on which 12 drags the second abutment surface 16 and making a dynamic friction that is opposed to the translation of the trolley means 5 along the guide means. This friction does not affect the fluidity and smoothness of motion of the trolley means along the guide means but prevents that a small disturbance, for example a gust of wind or a drive irregularities, may be undesirably set in motion the trolley means and reduces the translation irregularities. Preferably, at least one of the first 12 and/or of the second 16 abutment surfaces is provided with a viscous fluid by means of their recesses or dispensers or through at least one container for such a fluid. The presence of a viscous fluid of predeterminable kind and replaceable or renewable in the course of the operating life of the device allows to reduce or to eliminate the difference between static and dynamic friction of the trolley and it provides said fluid friction. The guide means 3 of the embodiment in object and illustrated in Figures 1 - 3, has two parallel rails and the corresponding trolley means is provided with a pair of rolling means rolling along a rail and a third rolling means rolling along the other rail. Each rolling means is provided with a single respective wheel means. The three wheel means are placed between the rails whose cross-sections are elongated, for example oval shaped, and accordingly bent towards the trolley means. In this way it is always guaranteed the abutment of the wheel means with the rails and are minimized the deflections, even with loads of highly relevant both in case of horizontal orientation of the guide means and in case of inclination of the latter. In this embodiment the abutment surface 12 is associated with the wheel means of the third rolling mean.
Alternatively, the invention provides that the trolley means is equipped with any number of rolling means and that each of the latter can be equipped with any number of wheel means; furthermore it is provided that the guide means can also have a single rail and/or that the wheel means of a rolling means match the same side or opposite sides of the rail or of the rails. It is also provided that a plurality of wheel means of one or more rolling means are provided with respective abutment surface 12 each dragging in abutment with a second abutment surface 16. It is also provided that the trolley means is equipped with orientation bubble levels, and/or of a stopping brake with respect to the guide means.
Returning to the embodiment of figure 1 - 3, the first abutment surface 12 is made on a side of the corresponding wheel means 9, therefore, the first abutment surface is of the same material of the wheel means. Alternatively, the first abutment surface 12 may consist of a face of a disc-shaped element, for example a metallic or synthetic material or composite, coaxially fixed, for example by gluing or co-molding, to such side of the wheel.
The sliding abutment means 14 is slidingly housed in a respective seat made in the trolley means 5 parallelly to and side by side the seat of the rotation shaft of the wheel means provided with the first abutment surface, said seat outflows in front pf a first abutment surface 12 portion.
The second abutment surface 16 is made at the end, protruding outward the respective seat, of the sliding abutment means 14 or may be fixed to said end and can be in form of a pad. Preferably, the second abutment surface 16 consists of a face of an element made of nylon ®, Teflon® or the like and fixed to or made by the sliding abutment means 14. The sliding abutment means 14 is pressed, in an adjustable manner, against the first abutment surface 12 by a pressure means 18 acting on it 14 in the direction of the first abutment surface 12.
The pressure means 18 comprises a threaded element 24 provided with manual drive wheel and engaged in a nut screw 30 or female screw, of the trolley means 5 and acting on the sliding abutment means 14 in the direction of mutual approach of the first 12 and second 16 abutment surfaces.
The threaded element 24 is placed laterally in respect to the trolley means and is staggered or offset with respect to the seat of the sliding abutment means and acts on one end 31 of a lever means 32 of the second kind whose opposite end 33 is pivoted to the trolley means 5 and whose median portion acts directly, on the sliding abutment means 14 by applying a force adjustable by means of the wheel and directed toward the first abutment surface.
The lever means 32 consists of a flexible rod which operates on the sliding abutment means in an elastic leaf spring manner.
The operation provides that the force of mutual abutment between the first 12 and second 16 abutment surfaces, and thus the friction between them, is adjusted by rotating the wheel of the pressure means 18. Said friction, due to the fluid interposed between the abutment surfaces is viscous or mixed viscous and grazing or, in absence of the fluid is grazing. The type of friction can be determined, for example, thanks to the application of different types and amounts of viscous fluid depending on the requirements preferably the invention provides a type a quantity of fluid to provide the constant fluid friction in any position and environment condition.
The variant of the device illustrated in Figure 4 differs from the previous embodiment in that the nut screw 30 for the threaded element 24 of the pressure means 18 is made in the trolley means 5 coaxially to the seat for the sliding abutment means 14 and the threaded element 24 acts on the sliding abutment means 14 by means of a compressible elastic means 20 consisting, for example, of a helical spring operating in compression and housed in said seat for the sliding abutment means 14. Thus the threaded element 24, the compressible elastic means 20 and the sliding abutment means 14 are aligned.
In this variant the wheel means is mounted, via rotation bearings, to its own shaft which is locked to the trolley means.
The variant of the device illustrated in Figure 5 differs from the previous embodiment of Figure 4 in that the sliding abutment means 14 is of cylindrical tubular shape and is coaxial with respect to the corresponding wheel means 9 and the second abutment surface 16 has the shape of a circular crown and abuts against the first abutment surface 12 having the same shape and made on one side of said wheel means 9. The threaded element 24 acts on the sliding abutment means 14 by means of a transmission means 34 in the form of a cup and a plurality of compressible elastic means 20 interposed between the threaded element 24, the cup transmission means 34 and the tubular cylindrical sliding abutment means 14. The variant of the device illustrated in Figure 6 differs from the previous embodiment in Figure 5 in that the nut screw 30 and the threaded element 24 are offset with respect to the axis of the wheel means and of the sliding abutment means and the threaded element acts on the cup transmission means 34 by means of an axial sliding pin provided with elastic means and operated by a lever means 32 consisting of a second kind lever similar to that of the first embodiment but preferably of rigid type. The variant of the device illustrated in figure 7 differs from the preceding embodiment in Figure 6 in that the transmission means 34 and the sliding abutment means 14 are cylindrical pin shaped and are housed, together with the interposed compressible elastic means 20 in the respective seats mutually aligned and staggered with respect to the axis of the corresponding wheel means and of the respective axis.
In the variant of figure 8 the first abutment surface 12 is disk-shaped and is fixed to the free end of the rotation shaft integral with the wheel means 9 and slidably matches with the facing second abutment surface 16 having the same disk shape. The second abutment surface 16 is made or fixed to the end of the sliding abutment means 14 sliding in its seat and actuated, through a compressed helical spring of the compressible elastic means 20, by means of the pressure means 18.
The first abutment surface 12 with the respective end of the rotation shaft integral with the wheel means 9 and the second abutment surface 16 with the respective end of the sliding abutment means 14, are housed in a chamber 44 made in the trolley means 5 and containing a fat or oil or other viscous fluid. Optionally, the sliding abutment means 14 and the respective seat are provided with corresponding flat faces or other means suitable to prevent the rotation of the sliding abutment means 14. Optionally, the trolley means may be provided with filling and discharge ducts afferent to the chamber to drain, to refill, to renew or to replace the viscous fluid contained in said chamber. Moreover, the first and/or second abutment surfaces can be equipped with radial grooves or sub-radial, recesses and concavities, outlets of ducts passing through and flowing into the chamber and/or other means to promote or maintain a viscous fluid film, at least partial, between them. The variant of Figure 9 differs from the previous embodiment in Figure 8 in that the sliding abutment means 14 is in the shape of a pin and its seat is aligned to the nut screw 30 for the threaded element 24. Said seat and nut screw are offset with respect to the rotation axis of the wheel means and the second abutment surface 16 is pad or circular shaped and acts on a side portion of the first discoidal abutment surface 12.
The variant of Figure 10 differs from the variant in Figure 8 in that the first abutment surface 12 may be formed or fixed to the end of a respective rotating shaft 40 connected to the rotating shaft of said wheel means 9 through gears 42 consisting, for example, of a bevel gear pair. This variant allows, inter alia, to modify the rotation speed of the first discoidal abutment surface 12 in respect to that of the wheel means 9 changing the entity of the forces of viscous friction.
A simple variant of the invention, whose understanding does not require specific figures, also provides that the rotation axes of the wheel means 9 of the rolling means 7 of the trolley means and the axes of rotation of wheels further possible trolley means 5 are interconnected by annular rotation means, for example, belt or chain engaged to keyed pulleys on the axis that are integral to said wheel means and wheels.
It is evident that each embodiment and variant can provide the adoption of fat or oil or other viscous fluid between the matching surfaces first 12 and second 16 to generate viscous friction between the wheel means and the trolley means 5.
The operation of the variants of the device of figures 4 - 10 is not substantially different from that of the embodiment of figures 1 - 3.

Claims

1) Device for handling video or picture acquisition means comprising a guide means (3) for the sliding of a trolley means (5) assigned to support and handle the video or picture acquisition means and having at least a rolling means (7) translating in abutment with the guide means (3); said device being characterized in that the at least one rolling means (7) comprises at least one rolling wheel means (9) in rolling abutment with the guide means (3) and it comprises at least a first matching surface (12) connected to said at least one respective wheel means (9) or made in the latter (9), said trolley means (5) bears a sliding abutment means (14) having a second matching surface (16) dragging on the first matching surface (12); in an operation translation condition of the trolley means (5) along the guide means (3), the rolling abutment of the at least one wheel means (9) along such guide means (3) rotates said wheel means (9) and, with it (9), the first matching surface (12) on which (12) the second matching surface (16) drags realizing a dynamic friction that is opposed to the translation of the trolley means (5) along the guide means (3).
Device according to claim 1 characterized in that at least one of first (12) and/or second (16) matching surfaces is provided with a viscous fluid by its recesses or supplying or through least one container for such fluid.
Device according to claim 1 or 2 characterized in that the first matching surface (12) can be made on a side of the corresponding wheel means (9) or may consist of a discoidal element coaxially fixed to such side or to the rotation shaft of said wheel means (9) or can be made or fixed to the end of a respective rotating shaft (40) connected to the rotation shaft of said wheel means (9) through gears (42); the sliding abutment means (14) is slidably housed in a respective seat of the trolley means (5) and the second matching surface (16) is fixed to, or made at one end of the sliding abutment means (14) and it (16) can be pad shaped and staggered or discoidal shaped and coaxial with respect to the first matching surface (12). 4) Device according to claim 1 or 2 characterized in that the sliding abutment means (14) is pressed against the first matching surface (12) by a pressure means (18) acting on it (14) in the direction of the first matching surface (12) in an adjustable manner and directly or through compressible elastic means (20).
5) Device according to claim 4 characterized in that the pressure means (18) comprises a threaded element (24) equipped with operation knob or wheel and engaged in a nut screw (30) of the trolley means (5) and acting on the sliding abutment means (14) in the direction of mutual approach of the first (12) and second (16) matching surfaces.
6) Device according to claim 5 characterized in that the threaded element (24) is aligned with the compressible elastic means (20) and/or to the sliding abutment means (14) to act directly on them or the threaded element (24) is staggered and acts at one end (31) of a lever means (32) whose opposite end (33) is pivoted to the trolley means (5) and whose median portion acts, at least via transmission means (34) or directly, to the sliding abutment means (14).
7) Device according to claim 6 characterized in that the lever means (32) is rigid and acts on the sliding abutment means (14) through the compressible elastic means (20).
8) Device according to claim 6 characterized in that the lever means (32) is resilient and it acts on the sliding abutment means (14) via the transmission means (34) or directly.
9) Device according to claim 2 and any one of the preceding claims characterized in that the first (12) and second (16) matching surfaces are housed in a chamber (44) formed in the trolley means (5); where such chamber (44) can serve as a container for the viscous fluid.
10) Device according to any of the previous claims characterized in that the trolley means (5) comprises a set of rolling means (7) and/or that the rotation axes of the wheel means (9) of these rolling means (7) and the rotation axes of further possible wheels of trolley means (5) are interconnected by annular rotation means.
PCT/EP2015/076722 2014-11-17 2015-11-16 Device for fluid friction handling of video or picture acquisition means WO2016079072A1 (en)

Applications Claiming Priority (2)

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ITBO2014A000646 2014-11-17
ITBO20140646 2014-11-17

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603730U1 (en) * 1996-02-29 1996-07-11 Movietech Filmgeraete Gmbh & C Impeller arrangement for a camera dolly or the like.
DE19643805A1 (en) * 1996-10-30 1998-05-07 Andreas Meyer Supporting device for cameras
DE202005020212U1 (en) * 2005-12-24 2006-03-30 Heim, Manfred Camera guide system comprises dolly which runs on rails supported by braces, dolly being propelled by cables connected to fixed drive unit or by drive dolly coupled to it
DE202008012368U1 (en) * 2008-09-12 2008-11-20 Baur, Stefan Guided camera slide for side, entrance and departure, especially in video and film
US8721199B1 (en) * 2013-06-07 2014-05-13 Rhino Camera Gear, LLC Slide-able mount for an image device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29603730U1 (en) * 1996-02-29 1996-07-11 Movietech Filmgeraete Gmbh & C Impeller arrangement for a camera dolly or the like.
DE19643805A1 (en) * 1996-10-30 1998-05-07 Andreas Meyer Supporting device for cameras
DE202005020212U1 (en) * 2005-12-24 2006-03-30 Heim, Manfred Camera guide system comprises dolly which runs on rails supported by braces, dolly being propelled by cables connected to fixed drive unit or by drive dolly coupled to it
DE202008012368U1 (en) * 2008-09-12 2008-11-20 Baur, Stefan Guided camera slide for side, entrance and departure, especially in video and film
US8721199B1 (en) * 2013-06-07 2014-05-13 Rhino Camera Gear, LLC Slide-able mount for an image device

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