DE102007046972A1 - Lifting column for connecting e.g. camera, has radial elastic assembly ring arranged at free lower end of outer column part, during utilization, for connection to pivot on rack of camera dolly, where ring is stretchable by outer clamp - Google Patents

Abstract

The column has an electric motor drive connected to an outer column part (1) for inner column parts (2, 3) relative to the outer column part. A radial elastic assembly ring (26) is arranged at a free lower end of the outer column part, during utilization, for connection to a pivot on a rack i.e. chassis, of a camera dolly. The assembly ring is stretchable by an outer clamp (14) that is clamped on the pivot. The column parts (1-3) are movable relative to each other over a profile roller. A tubular support (16) works together with a rotary driven threaded spindle (5).

Description

The The present invention relates to a lifting column for connection to a Camera, a seating arrangement for a cameraman od. Like., or one around a transverse to Hubsäulenlängsrichtung extending axis pivotally mounted cantilever, according to the Preamble of claim 1.

Such a lifting column is in conjunction with a camera car from the DE 32 36 837 C2 known.

at This construction is the assembly and disassembly of the lifting column on the chassis of a camera dolly relatively expensive, wherein the interface between lifting column and camera carriage no standardization allowed. This interface is very special and especially not for a quick assembly or disassembly and therefore also a change of the lifting column suitable. Furthermore are separate tools for assembly and disassembly the lifting column on the camera dolly or its chassis required. The well-known lifting column is not for a mounting or dismounting provided on the chassis of the camera dolly. It is a permanent on the chassis of the camera dolly mounted lifting column. For assembly or disassembly by the user would be the known Hubsäulenkonstruktion also too heavy.

Similarly, the construction according to the DE 33 22 677 C2 , from the also a camera dolly with a height adjustment of the camera serving vertical lifting column from an outer, resting on the chassis column part, a telescopically extendable from this central column part and in turn from the central column part extendable, the camera bearing central pillar part and between the in Cross-section of square column parts mounted, the mutual column guide serving roles, is known. The rollers are rotatably mounted on axes extending transversely to the walls of the column parts. These rollers are assigned parallel to the column axis extending, transversely projecting from the walls of the respective adjacent column guide rails. The rolling surfaces of the rollers are flat or rectilinear in cross-section. The running surfaces of the guide rails associated with the rollers are correspondingly flat. In order to obtain a clean vertical guidance of the telescopic column parts, each guide bar is associated with oppositely arranged rollers or roller pairs. The guide rails are thus detected by the roles of both sides. The design effort for a stable column guide is therefore relatively high.

outgoing from the aforementioned prior art is the present invention initially the task of a lifting column for To provide in a simple way to standardized Connecting parts, in particular so-called Euro and / or Mitchell adapter is connectable. Accordingly easy to install and disassembly of the lifting column, preferably without separate Tools.

Of Another object of the present invention is to provide a much simpler, compared to the prior art, but equally stable and functionally reliable axial or longitudinal guide of the relatively movable column parts to provide.

After all It is also an object of the present invention, a simple and reliable drive for telescoping To provide lifting column.

The first subtask is by the characterizing features of the claim 1. Regarding the further subtasks is based on the claims 5f and 8f, respectively.

Thereby, that on the free, especially in use lower end the outer column part, which is preferably is tubular, a radially elastic shroud for connection to a pin on a frame, in particular Chassis of a camera dolly od. Like. Arranged can be assemble and disassemble the lifting column very quickly. chassis and lifting column can in a simple way for example separated for transport, and reassembled for use become. The radially elastic ring according to the invention clamped an outer clamp clamped on the pin. The clamp is preferably designed in the manner of a hose clamp. The two ends of the clamp are in a preferred embodiment contracted by a clamping lever more or less, so that the clamping on the associated pin without separate Tools is possible. The same applies, of course also for the opening of the clamp connection between Mounting ring and pin. The aforementioned pin can be part of a so-called Euro or Mitchell adapters. In this respect, an assembly the lifting column on standardized parts possible and also preferred. Such arrangements are with regard to lifting columns, in particular telescopic lifting columns, not known.

The mentioned mounting ring is fixed at the lower end of the outer column part by screws od. Like. Holding means. It comprises a portion, which is preferably the axially above the lower end of the outer pillar portion projecting portion, the ver several, in particular 8 to 16, preferably 12 uniformly over the circumference includes arranged axial slots, which extends around this portion, the clamp around. Due to the mentioned axial slots of the mounting ring receives an elasticity in the radial direction, even if the mounting ring made of metal, especially aluminum or a titanium alloy. If the elasticity is to be increased, the number of axial slots is increased accordingly.

Of the Mounting ring is preferably designed so that in or on the lower end of the outer pillar part sliding and fastened by screws.

A particular embodiment of the invention Lifting column, for those with, but also without the aforementioned Mounting ring protection is sought, is characterized in that overall three pillar parts are provided, namely an outer pillar part, middle column part and inner column part. These are preferably tubular. Furthermore, a provided central support column, the rotation secured interacts with a rotationally driven threaded spindle. These Threaded spindle extends from below into the central support column. Inside the support column is a spindle nut. This is rotatably connected to the support column. Depending on the direction of rotation of the threaded spindle is the central support column together with the middle one Column part relative to the outer column part and the threaded spindle movable up or down. The threaded spindle So it's just like the outer pillar part firmly connected to the frame, in particular chassis. The inner one Column part is over at least one endless rope with the middle and outer pillar part operatively connected, the endless rope over for this purpose one at the top of the fixed with the middle pillar part connected support column on the one hand and at the bottom End of the support tube on the other hand arranged deflecting wheels guided around and over an upper cable holder with the outer column part on the one hand and a lower cable bracket with the inner pillar part on the other hand is connected by clamping. This is due to axial movement the support column together with the middle column part of the inner column part relative to the middle and thus also outer Column part axially movable between a position in which all pillar parts within the outer Part of the column are retracted, and a position in which the inner column part from the middle pillar part and this in turn from the outer pillar part maximally moved out.

to Telescoping of the lifting column is therefore only necessary a rotary movement of the threaded spindle in an axial movement of the one, namely implement medium column part, wherein the middle pillar part over the mentioned Endless rope construction moves the inner column part in such a way that it telescopes relative to the central column part. This telescope construction is relatively simple and yet reliable. There are only relatively few parts needed. Above all, it is very easy, the rotational movement on the threaded spindle bring to. For this purpose, it is only necessary, the threaded spindle via a simple belt transmission with an electric motor drive connect to. Instead of an electric motor drive it is conceivable, a mechanical drive in the form of a crank drive provided. It is also conceivable, instead of a drive belt a Drive chain or a drive gear to use. A drive belt However, it is the most suitable because of the noise level, since on leisesten.

From Of particular importance is still that the upper pulley for the at least one endless rope, preferably two endless ropes arranged diametrically to the support column are provided rotatably mounted on a bearing body is at the top of the support column by a elastic element, in particular a compression spring, axially outward is urged, so that the endless rope always tense remains.

Also regardless of the above measures, but also in combination with it, should be under protection a special longitudinal guidance put the relatively movable column parts become. For this purpose, the cross section of the rolling surface the effective between the column parts rollers either concave or convex shaped, with the associated treads are formed corresponding to the column parts.

Preferably the rollers are grooved rollers whose rolling surface is concave having shaped cross-section, wherein the associated tread attached to the column parts by axially extending to this Round rods are formed. It can, of course also semicircular rods are used.

These Column guide has the advantage that with a Minimum of castors a high anti-rotation, smoothness and leadership stability to be obtained. The thus formed column guide takes despite a small number of components and lateral forces on, without thereby the ease of the roller guide is impaired.

The Casters themselves are preferably ball-bearing and comprise one inner and an outer race. The mentioned Ball bearing is located between these two races. Of the Inner race is via axle bolts on the column parts fixed.

Hereinafter, a preferred embodiment of an inventively designed Lifting column explained in more detail with reference to the accompanying drawings. Show it:

1 a longitudinal section through an inventively designed lifting column;

2 a 90 ° offset longitudinal section through the lifting column according to 1 ;

3 a part of the telescopic construction of the lifting column according to the 1 and 2 ;

4 a cross section through the lifting column according to 1 along line JJ in 1 ;

5 a section through the column according to 2 along line EE in 2 ;

6 a section through the lifting column according to 2 along the line GG in 2 ; and

7 the cut according to 5 on an enlarged scale.

The 1 to 7 show a lifting column for connecting a camera, a seat assembly for a cameraman, or one about an axis extending transversely to the Hubsäulenlängsrichtung axis pivotally mounted arm, consisting of three telescopic and profile tread rolls 67 (please refer 5 and 7 ) relative to each other movable column parts 1 . 2 . 3 , wherein with the outer pillar part a drive, here electric motor drive, namely worm gear motor 63 for the inner and middle pillar part 2 . 3 relative to the outer pillar part 1 connected is. The motor 63 is inside a case 29 with lid 28 , The bottom of the case 29 is as a motor mount 27 trained (see 2 ). Through the engine mount 27 extends the drive shaft of the engine 63 down through. At this is a tension roller 31 connected, over which a V-belt 68 is laid. The V-belt 68 extends over another tension roller 33 that of a threaded spindle 5 assigned.

The lifting column thus consists of a total of three pillar parts, namely the outer pillar part 1 , middle pillar part 2 and inner pillar part 3 , All column parts are tubular. About the outer pillar part 1 the lifting column is connected to a frame, in particular chassis. For this purpose is at the free, namely in use lower end of the outer column part 1 a radially elastic mounting ring 26 for connection to a pin not shown here on a rack, z. B. chassis, arranged, wherein the radially elastic mounting ring 26 through an outer clamp 14 clamped on the aforementioned pin is tensioned. The mounting ring 26 has a portion, here axially over the lower end of the outer column part 1 projecting section with several, here 12 evenly distributed over the circumference arranged axial slots 30 on, being around this section with the axial slots 30 the mentioned clamp 14 herumerstreckt. The clamp 14 is like a hose clamp with a clamping screw, here a clamping lever 70 formed by the two facing each other ends of the clamp 14 more or less contractible.

The mounting ring 26 is in the illustrated embodiment in the lower end of the outer pillar part 1 pushed in and there by means of radially extending through the outer column part through screws 55 attached (see 1 ). These screws also serve to attach a lower pulley cover 36 , This covers the tension roller downwards 33 from.

As already mentioned, the tension roller is 33 rotatably (feather key 59 ) with a threaded spindle 5 connected in the ground 4 of the outer pillar part 1 is rotatably mounted. The corresponding ball bearing is with the reference numeral 65 marked (see 2 ). The floor 4 is also by means of radially through the outer column part 1 through extending screws 47 attached.

The threaded spindle 5 extends into a central position within the outer column part 1 arranged support tube 16 into it. The support tube 16 is with a spindle nut 7 Mistake. The spindle nut 7 is rotatably on the inside of the central support tube 16 attached. Furthermore, the central support tube 16 opposite the threaded spindle 5 secured against rotation. Depending on the direction of rotation of the threaded spindle 5 is the central support tube 16 together with the middle pillar part 2 relative to the outer pillar part 1 and also relative to the threaded spindle 5 movable up or down. The connection between the central support tube 16 and the middle pillar part 2 via a connection plate 8th , which are at the lower ends of Sützrohr 16 and middle pillar part 2 flanged (countersunk screws 43 and cylinder screws 52 in 2 ). At the bottom of the connection plate 8th are rubber discs 39 arranged a metallic plant between the ground 4 and the connection plate 8th when retracting the lifting column according to the 1 and 2 prevented.

Through the threaded spindle 5 So it becomes the middle pillar part 2 from the outer pillar part 1 moved out. In the reverse direction of rotation of the threaded spindle 5 drives the middle column part 2 in the outer column part 1 back into a position according to the 1 and 2 ,

The inner pillar part 3 is operatively connected to the middle and outer pillar part, namely over two diametrically to the support tube 16 arranged endless ropes 21 (see also 3 ). The endless ropes 21 are each for the above purpose via one at the top of the middle column part 2 firmly connected support tube 16 on the one hand and at the lower end of the support tube 16 On the other hand arranged deflecting wheels or pulleys 9 . 10 guided around, and beyond an upper cable bracket 12 . 58 with the outer pillar part 1 (across the floor 4 and fixing screw 50 in 3 ) and a lower cable holder 13 . 57 with the inner pillar part 3 on the other hand clamped connected. Clamping takes place via the threaded pins already mentioned 57 . 58 on the endless rope 21 act immediately. By this type of operative connection is at axial movement of the central support tube 16 including middle pillar part 2 the inner pillar part 3 relative to the middle column part 2 and thus also relative to the outer pillar part 1 axially movable between a position in which all column parts within the outer column part 1 according to the 1 and 2 retracted, and a position in which the inner column part 3 from the middle pillar part 2 and this from the outer pillar part 1 maximally moved out. About the mentioned endless rope construction is therefore the inner pillar part 3 depending on the relative movement between the middle pillar part 2 and outer pillar part 1 with the middle pillar part 2 mit- and relative to this out of the middle column part or hineinbewegbar in this.

At the free or upper end of the inner pillar part 3 is a connection for a camera od. Like. Provided. This connection is in the form of a conventional Euro or Mitchell adapter 22 educated. However, there are also connections for boom arms or cameraman seats od. Like. Conceivable. It is a known connection construction, which need not be discussed in detail here.

The upper pulleys 10 for the endless ropes 21 are on a bearing body 19 rotatably mounted about an axis transverse to the longitudinal extent of the lifting column. This bearing body 19 is at the upper end of the central support tube 16 by an elastic element, here helical compression spring 64 axially outward, pushed up here, while maintaining a minimum tension of the endless ropes 21 , The pivot bearing of the pulleys 10 via deep groove ball bearings 66 , The same applies to the lower pulleys 9 , The helical compression spring 64 acts at the top against one within the bearing body 19 arranged spring plate 18 , This spring plate 18 is by a spring pressure screw 20 acted upon, causing the bias of the helical compression spring 64 can be adjusted. This can be in a corresponding manner, the tension of the endless ropes 21 to adjust. Moreover, the helical compression spring is located within a spring housing 17 , which at the upper end of the central Sützrohres 16 is attached. This spring housing 17 is cup-shaped and is made by the endless ropes 21 kept in position. It is therefore not necessary that the spring housing od by means of fastening screws. Like. Is fixed separately at the upper end of the central support tube. Through the interaction of endless ropes 21 and helical compression spring 64 there is a sufficient fixation of the spring housing 17 , which only on the upper end of the central support tube 16 is deferred.

The mentioned rope holder 12 is formed by a longitudinal bar, with its lower end to the ground 4 of the outer pillar part 1 is connected (cylinder screw 50 ). The upper end extends to the upper end of the central support tube 16 in the retracted state of the same and ends in this position just below the upper pulleys 10 (please refer 3 ).

At this upper end also the already mentioned clamping of the endless rope by means of the setscrews takes place 58 ,

Similarly, the cable clamping takes place by means of the threaded pins 57 near the lower end of the inner pillar part 3 just above the lower pulleys 9 in the retracted state of the lifting column accordingly 3 , The corresponding terminal block 13 is by means of cylinder screws 53 on the inside of the inner pillar part 3 attached.

The tension roller 31 that the electric motor drive 63 is assigned, bottom side with a bottom plate 35 locked. This is done by means of countersunk screws 49 at the engine intake 27 attached.

Based on 5 to 7 is still a preferred embodiment of an axial guidance of the column parts 1 . 2 . 3 be explained.

Accordingly, between the outer pillar part 1 and middle pillar part 2 on the one hand and middle pillar part 2 and inner pillar part 3 on the other hand rollers in the form of profiled rollers 67 effective. These profiled rollers are in the form of deep groove ball bearings whose outer race has a rolling surface with a concave cross section. This rolling surface corresponds with guide rails 15 in the form of round bars, ie with guide rails, their rollers 67 associated treads have a convex cross-section. These guide rails 15 are inside of axial grooves 61 placed on the outsides of middle and inner pillar part.

Corresponding 2 are each at the upper end of the outer column part 1 on the one hand and the upper end of the middle pillar part 2 on the other hand, the rollers 67 rotatably mounted, in each case about an axis 25 transverse to the column longitudinal direction. The axes 25 In addition, they extend approximately tangentially to the tubular column parts 1 respectively. 2 ,

The rollers 67 are each within bearing bodies 23 . 24 rotatably mounted, which are inserted from the outside into corresponding recesses of the outer and middle pillar part and fixed to these column parts, as the 2 and 5 to 7 very good. The corresponding fixing screws are in 6 with the reference number 44 characterized.

The round bar-like guide rails 15 are also fixed by means of upper and lower mounting pins within the axial grooves on the outside of the middle and outer column part. These mounting pins are in 2 with the reference number 32 and 34 characterized.

All Features disclosed in the application documents are considered to be essential to the invention as far as they are individually or in combination the prior art are new.

1

outer column part

2

middle column part

3

internal column part

4

bottom flange of the outer pillar part

5

screw

6

cover the ball bearing of the threaded spindle

7

spindle nut

8th

connecting plate

9

lower idler pulley

10

upper idler pulley

11

retaining washer for upper pulley

12

Cable holder - top

13

Cable holder - below

14

clamp

15

guide rail (Round rod)

16

central support tube

17

spring housing

18

spring plate

19

bearing body

20

Spring pressure screw

21

endless cable

22

adapter

23

Caster bearing body - inside

24

Caster bearing body - outside

25

Roller axle

26

mounting ring

27

engine mount

28

cover

29

motor housing

30

axial slot

31

idler

32

fastening pin

33

idler

34

fastening pin

35

bottom cover

36

Clamping disks cover

39

rubber discs

41

cylinder head screw

43

Senkschraube

44

Senkschraube

46

Senkschraube

47

Senkschraube

48

Senkschraube

49

countersunk screws

50

fixing screw

51

cylinder head screw

52

cylinder head screw

55

cylinder head screw

57

lower Cable holder, threaded pins

58

upper Cable holder, threaded pins

59

adjusting spring

60

adjusting spring

61

axial grooves

63

Worm gear motor

64

Helical compression spring, elastic element

65

ball-bearing

66

Deep groove ball bearings

67

Track rollers (Grooving rolls)

68

fan belt

70

clamping lever

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 3236837 C2 [0002]
• - DE 3322677 C2 [0004]

Claims (9)

Lifting column for connecting a camera, a seat assembly for a cameraman od. Like., Or one about a transversely extending to Hubsäulenlängsrichtung axis pivotally mounted arm, consisting of at least two telescopic and rollers ( 67 ) relative to each other movable column parts ( 1 . 2 . 3 ), whereby at the outer column part ( 1 ) a drive, in particular electromotive drive ( 63 ) for the at least one inner column part ( 2 . 3 ) relative to the outer column part ( 1 ), characterized in that at the free, in particular in use lower end of the outer column part ( 1 ) a radially elastic mounting ring ( 26 ) is arranged for connection to a pin on a frame, in particular chassis, wherein the radially elastic mounting ring ( 26 ) by an outer clamp ( 14 ) clamped on the pin is tensioned. Lifting column according to claim 1, characterized in that the mounting ring ( 26 ) a section having a plurality, in particular 8 to 16 evenly distributed over the circumference arranged axial slots ( 30 ), wherein around this section the clamp ( 14 ) extends around. Lifting column according to claim 1 or 2, characterized in that the clamping collar ( 14 ) in the manner of a hose clamp with a clamping screw, in particular a clamping lever ( 70 ) is formed by the or the two facing each other ends of the clamp ( 14 ) are more or less contractible to correspondingly the radially elastic portion of the mounting ring ( 26 ) to tighten more or less closely around the associated terminal pin. Lifting column according to one of claims 1 to 3, characterized in that the mounting ring ( 26 ) in or on the lower end of the outer column part ( 1 ) and by means of screws ( 55 ) is attachable. Lifting column, in particular according to one of claims 1 to 4, characterized in that a total of three column parts are provided, namely - an outer column part ( 1 ), - a middle column part ( 2 ), and - an inner column part ( 3 ), and in that a - central support tube ( 16 ), which is secured against rotation with a rotationally driven threaded spindle ( 5 ) and depending on the direction of rotation of the threaded spindle ( 5 ) together with the middle pillar part ( 2 ) relative to the outer column part ( 1 ) is movable up or down, wherein the inner column part ( 3 ) via at least one endless rope ( 21 ) with the middle pillar part ( 2 ) on the one hand and outer pillar part ( 1 On the other hand, the endless cable (FIG. 21 ) for this purpose via one at the upper end of the middle column part ( 2 ) firmly connected support tube ( 16 ) on the one hand and at the lower end of the support tube ( 16 ) arranged on the other hand deflecting wheels ( 10 respectively. 9 ) and via an upper cable holder ( 12 . 58 ) with the outer column part ( 1 ) on the one hand and a lower cable bracket ( 13 . 57 ) with the inner column part ( 3 ) is connected on the other hand by clamping, so that during axial movement of the central support tube ( 16 ) with middle column part ( 2 ) the inner column part ( 3 ) relative to the middle ( 2 ) and thus also outer pillar part ( 1 ) is axially movable between a position in which all column parts ( 2 . 3 ) within the outer column part ( 1 ) and a position in which the inner pillar part ( 3 ) from the middle column part ( 2 ) and this in turn from the outer column part ( 1 ) have moved out the maximum. Lifting column according to claim 5, characterized in that at the free or upper end of the inner column part ( 3 ) a connection ( 22 ) od for a camera. Like. Is provided. Lifting column according to claim 5 or 6, characterized in that the upper deflection roller ( 10 ) for the at least one endless rope ( 21 ) on a bearing body ( 19 ) is rotatably mounted, which at the upper end of the central support tube ( 16 ) by an elastic element, in particular a compression spring ( 64 ) is urged axially outward while maintaining a minimum tension of the endless rope ( 21 ). Lifting column, in particular according to one of claims 1 to 7, characterized in that the cross section of the rolling surface of the between the column parts ( 1 . 2 . 3 ) effective rollers ( 67 ) is either concave or convex, with the associated treads ( 15 ) are formed corresponding to the column parts. Lifting column according to claim 8, characterized in that the rollers ( 67 ) Are profiled rollers or grooved rollers whose rolling surfaces each have a concave-shaped cross-section, wherein the associated running surfaces on the column parts ( 1 . 2 . 3 ) by axially extending to this attached (fixing pins 32 . 34 ) Round rods ( 15 ) are formed.