DE3535962A1 - SLIDING TELESCOPIC TRIPOD FOR OPTICAL PURPOSES, ESPECIALLY FILM SHOTS O.AE. - Google Patents

Description

PATENT AGENCY OFFICE SCHUMANNSTR. 97 D-4000 DÜSSELDORF 1

Telephone: (0211) 683346 £ "Telex: 08586513 copd

PATENT LAWYERS:
Dipl.-Ing. W. COHAUSZ Dipl.-Ing. R. KNAUF ■ Dipl.-Ing. HB COHAUSZ Dipl.-Ing. DH WERNER

Slidable telescopic tripod for optical purposes, especially film recordings or the like .

The present invention relates to a sliding telescopic tripod for optical purposes, in particular Film recordings o. Ä. More precisely, the invention relates to a tripod that "by a Has double chain controlled telescopic elements and provided with a system of parallelograms which facilitate the movement of the running device and an accurate orientation of the same

to back up.

The use of telescopic storage devices is in the field of optics, for example in the field of film recording technology, and in other technical fields.

Such devices are either via belts and pulleys or screws or hydraulic Systems operated.

The use of mechanical systems, for example wise belts, pulleys, screws, but makes loud noises and during operation makes regular and careful maintenance

necessary to prevent failure of the mechanism.

The use of hydraulic systems makes the overall unit both in terms of overall dimensions as well as the weight of the systems complex.

In addition, all of the types of devices described above give the tripod insufficient flexural strength when this is in its maximum extended position, in order to be able to record the corresponding moments caused by the attacks on the free ends of the tripod Forces are caused. This is the maximum operating height for such known tripods limited.

These and other disadvantages are eliminated by the device designed according to the invention, which from a tripod provided with telescopic elements, through which the mentioned noise and stability problems can be solved and a double chain unit for controlling and storing the telescopic elements used. Wheels are integrated into the device, which are connected to the Tripod are connected.

In the device designed according to the invention The double chain unit used is described in Italian patent 1,057,915 and has been modified accordingly modified to make them suitable for tripods of the type described above.

This double chain unit acts as a push rod and is characterized in that both chains of the

Chain pairs are identical and are derived from known chains. Each chain has a multitude of coupling plates on both side surfaces, which are the analogous side elements of the known Replace chains.

When the two chains of the double chain unit are in alignment with one another in a suitable manner are connected to each other, a rigid rod is formed, which acts as a lifting system for the extension the telescopic elements of the tripod acts and functions in such a way that the flexural strength the device is increased considerably, so that tripods are created in this way that can reach a greater height than the tripods currently on the market.

By using the chains mentioned above, a form-fitting power transmission system is achieved reached in both directions of movement. The system thus enables very precise settings when extending the telescopic elements of the tripod.

, 25 The invention is based on the further object to provide a wheeled system for moving the tripod in which each wheel has a parallelogram with a variable geometry with the central element of the according to the invention designed device is connected to in this way a change in height of the tripod and at the same time the wheels are perpendicular to the ground hold without the risk of instability of the device is given.

A special object of the invention is therefore to provide a displaceable telescopic stand for optical To create purposes, in particular film recordings or the like, that includes the following components: Telescopic elements that can be moved via double chain lifting devices and stiffening devices, Running devices that have parallelogram devices with variable geometry with a central element of the tripod are connected, control and fastening devices that slide on the central element are arranged to control the position of the running devices and to fix them, drive and power transmission devices for the double chain devices at the top and bottom of the central element are arranged, and storage and guide devices for the double chain devices, which are arranged parallel to the central element outside the same.

According to a preferred embodiment of the invention, the drive devices consist of one Hand crank or an electric motor.

The telescopic elements are provided with locking devices at one end to ensure stability or to increase the strength of the tripod.

Orientation devices for the optical devices are advantageously at the free end of the Telescopic elements, on which the optical devices are attached, arranged.

According to the invention, the running devices comprise three wheels which are arranged at an angle of 120 ° and each equipped with a parallelogram device

are seen.

In a preferred embodiment of the tripod designed according to the invention, the parallelogram devices comprise the following: first and second arms hinged at one end to the sliders are and are articulated on the wheel at the same point of articulation at the other end, a third Arm that is arranged above and parallel to the first and second arm relative to the same and the ends of which are hinged to the sliders and the wheel, and a fourth Arm articulated at one end to the central element and at the other end to the same point is on which the third arm is mounted on the wheel.

The invention is illustrated below using an exemplary embodiment in conjunction with the drawing in FIG individually explained. Show it:

FIG. 1 shows a perspective view of a device designed according to the invention;

Figure 2 is a schematic view of the double chain unit the device;

Figure 3 is a partial view, partly in section,

the device;
30th

FIG. 4 shows a second schematic view of the double chain unit of the device;

Figure 5 is a section along lines A-A and B-B in Figure 4; and

FIG. 6 shows a section along line C-C in

Figure 5.

Figure 1 shows a stand 1, the telescopic elements at the free end 2, a device 3 for fastening and a device (not shown) for orientation the group of optical components.

On each of the elements 2 with the exception of the last element on which the group of optical components is attached, a locking device 4 is provided.

A double chain unit (see Figure 2) is operated via a hand crank 5 and is rigid with the the latter part connected. If you go from the attachment point of the double chain unit to the Element 2 goes out, the double chain extends in a central element 6 in which two chains are coupled to one another are, up to a partition group arranged in a housing 7, as shown below is explained with reference to the drawing.

After the separation, each chain runs first inside outer bearing and guide elements 10 up to a pinion (not shown) serving for the return, which is arranged in a housing 9, and then down inside inner bearing and guide elements 8.
30th

The kinetic energy of the hand crank 5, which is provided with a gear (not shown), is via a Chain 32 (see Figure 3), which is arranged in a tube 11, and a pinion serving for return, which is arranged in a housing 12, on the double

transfer chain unit.

Wheels 13 are via parallelogram systems 14 with the

Stand 1 connected.
5

Each parallelogram 14 comprises two arms 15 and 16, which at points 17 and 18 on a sliding element 19 slidably disposed on the central member 6 and articulated at a point 20 on the Wheel 13 are mounted, an arm 21 which runs parallel to the arms 15 and 16 and at the points 22 and 23 is articulated on the element 19 and on the wheel 13, and an inclined arm 24 which is attached to the Points 23 and 25 on the wheel 13 and at the upper end of the central element 6 is articulated.

By actuating a lever 26, the position of the wheels 13 can be adjusted without affecting the stability of the tripod 1 to impair. 20th

FIG. 2 shows the manner in which the individual elements 27 and 28 of the double chain unit are coupled shown.

The elements 27, 28 are coupled to one another in the area in which they are connected to the chain wheels 29 and 30 are engaged. They are then separated from one another along the guide 31. she then come back into engagement with the sprockets 29 and 30, over which they move up along the Element 10 are performed (see Figure 1).

The chain 32, via which the movement is transmitted from the hand crank 5 to the chain wheels 29 and 30 is shown in FIG.

• D.

The transmission of the movement is shown in detail in FIGS.

The two sprockets 29 and 30 are each provided with two sprockets 33 and 34, of which the the first mesh with each other, while the second mesh with the elements 27 and 28 of the double chain to to couple these together.

The ring gear 33 of the sprocket 29 also meshes with a pinion 35 that controls the movement of the hand crank 5 and the chain 32 on the ring gear 33 transfers.

The coupling of the sprockets 29 and .30 via the sprockets 33 is carried out in order to prevent that the load acts on only one sprocket 29, 30.

The pinion 35 is attached to a shaft 36, the axis of which is parallel to the axes of the chain wheels 29 and 30 is arranged.

During assembly, a bushing 37 is fastened on the shaft 36 in front of the pinion 35. This jack 37 fixes one end of a spring 39 by inserting a pin into the housing 38.

The pinion 35 is then fixed to the bush 37 by means of a wedge inserted into a housing 40.

Since a corresponding load acts on the extended stand 1 and a rotation of the pinion 35 causes the tripod 1 to be lowered into its inoperative position is at the opposite end the shaft 36 is provided with a rotation preventing locking device which would be familiar to those skilled in the art

is known and is shown schematically in FIG. This device consists essentially of an outer ring 41, two rollers 42 and one

inner ring 43.
5

The outer ring 41 is rigidly connected to the housing 12 via screws 44, while the inner ring 43 is rigidly attached to the shaft 36 via plug pins 45.
10

The chain 32 acts on a pinion 46 which is rigidly connected to a cap 47 which is on the shaft 36 is attached. The pinion 46 has the same number of teeth as that operated by the hand crank 5 Pinion so that the gear ratio of the chain 32 is 1: 1.

The other end of the spring 39 is via a pin which is inserted into an opening 48 with the cap 46 connected.

The spring 39 must have radial play in order to enable it to be fixed and released around the shaft 36.

When the stand 1 is extended, the chain 32 acts on the upper end of the spring 39 and is fixed thus the same around the shaft 36. In this state, the locking device is released so that the shaft 36 can rotate even in the fixed state of the spring 39.

In the extended position of the stand 1, the locking device prevents the telescopic elements move to their lowered position. 35

ORIGINAL SHCPEGTED

Therefore, the telescopic elements can only be lowered when the hand crank 5 is operated, whereby the locking device is brought into its inoperative position and the spring 39 is released will.

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Claims (10)

COHAUSZ & FLÖRACK 3535962 PATENT ANWALTSBÜRO SCHUMANNSTR. 97 D-4000 DÜSSELDORF 1 Telephone; (0211) 683346 Telex: 08586513 cop d PATENTANWÄLTE: Dipl.-Ing. W. COHAUSZ ■ DipHng. R. KNAUF Dipl.-Ing. H. B. COHAUSZ Dipl.-Ing. D. H. WERNER claims 1. Slidable telescopic tripod for optical purposes, IQ in particular film recordings o. Ä., Characterized in that it comprises the following components: telescopic elements (2) that can be operated by double chain lifting and stiffening devices, running devices that are parallel , * ^ Grammar devices with variable geometry are connected to a ¹ V central element of the stand (1), control and fastening devices which are slidably arranged on the central element to control the position of the running devices and to fix them, drive and power transmission devices for the double chain devices, which are arranged at the upper and lower ends of the central element, and bearing and guide devices for the double chain devices, which extend parallel to and outside the central element. 2. Stand according to claim 1, characterized in that the drive devices are a hand crank (5). 3. Stand according to claim 1, characterized in that that a vertical chain (32) for the transmission of motion between the drive devices and the power transmission devices the double chain devices is provided. 4. Stand according to claim 3, characterized in that that the power transmission devices consist of a first pinion (46) which meshes with the chain (32), a second pinion (35), which is mechanically connected to the first pinion, and a first and second sprocket (29, 30) consist, which are each provided with two coaxial toothed rings (33, 34), of which the outer (33) comb with each other and comb the inner (34) with one of the elements of the double chain devices, wherein the outer ring gear (33) of the first or second sprocket (29, 30) further with the second pinion (35) meshes. 5. Stand according to claim 4, characterized in that the first and second Pinions (46, 35) are connected to one another via a shaft (36), the axis of which is parallel to the axis of the first and second sprocket (29, 30) extends,. wherein the second pinion (35) is arranged on the shaft is, as well as a spring (39) which is provided on the shaft and at one end by means of a Bush (37) rigidly attached to the second pinion (35) and rigidly attached to a cap (47) at the other end is rigidly fixed to the first pinion (46) and arranged coaxially to the shaft (36) outside the same is. 6. Stand according to claim 5, characterized in that g e k e η η ζ ei c h η e t that on the shaft (36) at the end opposite the end on which the second pinion (35) is arranged, a locking device is provided against rotation. 7. Stand according to claim 1, characterized in that that the telescopic elements (2) at one of their ends with locking devices (4) are provided. 8. Stand according to claim 1, characterized in that orientation devices for the optical devices at the free end of the telescopic elements (2) on which the optical devices are attached, are arranged. 9. Stand according to claim 1, characterized in that that the running devices comprise three wheels (13) which are at an angle of 120 ° and are each provided with parallelogram devices. 10. Stand according to claim 9, characterized in that that the parallelogram devices comprise the following components: first and second arms (15, 16) hinged at one end to the sliders and at the other End at the same pivot point on the wheel (13) are mounted, a third arm (21) above of the first and second arms (15, 16) is arranged and extends parallel to these as well has ends articulated on the sliders and the wheel (13), and a fourth arm (24), which is hinged at one end to the central element and at the other end to the same point is on which the third arm (21) is articulated on the wheel (13).