DE2908290A1 - Hinged connector for load bearing bars - has strap on inner surface of bars to permit bending of assembly in one direction only - Google Patents

Abstract

The bearer arm mechanism is capable of outward movement, and forms a support bar rigidly and freely extending in a load direction. The bar comprises individual components articulately interconnected and when the mechanism moves outwards they stiffen in their engagement with each other. Stops (22, 23) are on the ends of components (13, 14). In the outwardly moved position they abut, supporting the components against each other. The links joining the two components act to transmit the tractive force and are of the pivot type (25).

Description

Extendable support arm device

The invention relates to an extendable support arm device, the one in the extended state, at least within limits, in one load direction preferably freely cantilevered supporting rod, which consists of individual limbs that are articulated together and attack each other stiffening when extending the support arm device by block their flexibility.

Known as Vorrictunffen of this type are, for example, articulated chains with Can be blocked in their pivoting mobility using sliding sleeves. Further are lined up one behind the other and can be nested to form a support rod Individual links known. However, all of these devices require multiple times Material of a one-piece support rod. This increases the weight of a supporting element given length very large, which in turn has a detrimental effect on the dimensioning the individual links. At the same time, the support arm device takes in the wound State of the same approximately twice the extension length, which is bpi more predetermined Misfahrlänge has a very negative effect on the required storage space.

In addition, the individual links are complicated to manufacture and so expensive.

The invention is based on the object of an extendable support arm device to create a defined genus that is simple under construction, function and handling, while being inexpensive, that extends and retracts quickly and easily can be that allows almost unlimited extension and projection lengths and even then it still has an extraordinarily high load-bearing capacity and that with everything in the The retracted state can be adapted to the available space and extremely has little space requirement, the device being both stationary and mobile and can be used for all possible cases in which a change of use of space in the broadest sense is desired. At the same time, the material requirements considerably reduced per line unit and the formation of individual links is greatly simplified will.

In the case of an extendable support arm device, the task is the one at the beginning named type according to the invention solved by signs of the members on each of them adjoining ends, the stops in the extended state of the Support arm device rest against each other and support the links against each other and that the joints connecting two links to one another act as tension transmitters are trained. The invention is based on the principle, individual one behind the other arranged and resting against one another in the extended state of the support arm device Links that are hinged together to form a support arm assembly to use. In this way, the material requirements are reduced so much that that this is hardly more than the material requirement of a single-piece support rod. The individual links are usually designed and connected to one another in such a way that that these as sections of a hollow box profile with their closed sides run in the direction of the longitudinal extent of the support arm device. Will the For example, a hollow box profile used as links sections arranged so that the two linear sides in Direction of the longitudinal extension of the Run the support arm device and the two shorter sides act as stops, is the material requirement compared to a one-piece bearing rod made from a hollow box profile even less. Since sections of an extruded profile are used as individual links can be, the price of a single link is very low. A jamming and / or tilting of the individual links is practically impossible, since these do not have interlocking parts. Because of this, minor detriment Inaccuracies in the individual links do not prevent the overall construction from functioning in any way Way. This also means that the processing effort for the individual links is as low as kept possible.

As far as handling is concerned, this is also very easy and Not susceptible to failure, since the individual links only move by one when extending and retracting Joint axis must be moved. With the appropriate design of the joint a functioning of the construction even with heavy pollution and / or extreme pollution Weather conditions guaranteed. Since the extension length of the support arm device is the same is the winding length is that required when the device is in storage Storage space extremely small.

The device can be both stationary and mobile and thereby for all the cases are used in which a conversion of space to the greatest possible extent Sense is desired. For example, the device according to the invention is suitable for construction of retractable protective roofs and side walls that can be retracted when not in use or back walls or even for the construction of entire halls, which can be done quickly if necessary can be dismantled again. It is particularly important that the Covers or side walls can be extremely large. Leave it thus with relatively little effort Protective devices ftr Airplanes, vehicles, open-air theaters, swimming pools, exhibition and trade fair stands etc. erect. Also for setting up quick accommodation, e.g. in the military sector, support arm devices according to the invention can be used with advantage. A further areas of application are extendable or retractable protective roofs or if required Side walls of sports stadiums. Also for awnings, like weather protection roofs in general and side winds, the device according to the invention is suitable with advantage. For this also pay for room dividers that can be set up quickly in the form of, for example, vertically condescending ones flexible partition walls or horizontally extendable false ceilings. This list shows that the support arm device according to the invention has a wide field of application is developed, in which previously known devices of this type fail. One advantageous combination in the area of this system of load-bearing and infill Dividing can e.g. in the connection of a left-hand and a right-hand one Support rod with a roller shutter curtain lying in the middle or a corresponding one infill part, with the links of the left and right Row of links are connected to a slat of the roller shutter rim.

In this way, a simultaneous extension also becomes the load-bearing and infilling parts, e.g. an entire wall, ceiling or the like, possible. In addition, such a device can also be used to build manipulators be used. Likewise, using the device according to the invention extendable and retractable, makeshift bridges are made.

It is advantageous that the joints are preferably designed as swivel joints are trained. Such an embodiment of the joints limits rotation adjacent links to each other.

Depending on the material used and the design of the swivel joints they know a twisting of neighboring links wn its I ,, longitudinal axis even prevent it completely. This is very important with it when extending and retracting the support arm device maintain the position of adjacent links to one another and thus the support arm device receives the desired shape. Even in the extended State of the support arm device and under load the same can through accordingly designed swivel joints a torsion of the support arm device around its longitudinal axis can at least be prevented to a certain extent. If the joints are not used as swivel joints, but designed as ball joints, must be a possible twisting of individual links to each other through overlapping parts and / or through appropriate profiling the attacks are countered. Are e.g. adjacent stops with webs and grooves provided is a twisting of adjacent links in the abutting state of the attacks impossible.

It is advantageous that the stops have edges or surfaces. The stops lie against one another in the extended state of the support arm device at. If the extended support arm device is now loaded, they are attached to each other adjacent stops as a result of the occurring sagging rels, t;, v to each other emotional. For this reason, the appropriate must be trained to do one more or less slight movement means that they are already resting against each other Attacks does not cancel out and thus the rigidity of the Konstrukals attachment points tion not affected. If you were to train the attack #, this would be a danger given in large measure. However, if the stops have edges or surfaces, is corrected this danger. It is particularly beneficial to have the edges running in a straight line and to design the surfaces to run smoothly. Because only through such training a stabilizing effect can be produced. To twist the individual To meet links relative to each other, it is useful to match edges and surfaces to be profiled in order to achieve a non-rotatable To achieve connection.

It is advantageous to use the stops as preferably face plates to train. Arranging the individual stops on the face makes it possible to To use sections of solid material or hollow material as individual links without to have to edit these additionally. These individual links are compact in their training and simple and therefore cheap to produce. Of course you can the stop can also be attached in the area between the two end faces. at this training must then, however, the individual members to their assigned Attacks overarching, protruding parts have what the creation of the Individual links are more expensive and the functioning of the construction is more susceptible to storage. If the stops are designed as plates, the contact surfaces are relatively large. This means that individual stops slide from one another in the event of relative movement of individual ones Links impossible to each other.

It is beneficial to keep the joints away from the area of contact to attach two stops. Each carrier has a tension zone and a pressure zone, which run within the carrier and at a distance from one another. Since the joints as Tensile force transmitters are formed and the stops in the mutual contact area If the individual links act as compressors, the joints must be spaced apart from the contact area of the stops run to the necessary division of the wearer in the tension zone and pressure zone.

It is advantageous that the individual links are preferably the same Own dimensions. This means that the space required by the rack arm device is in the storage state the same is very low, since e.g. when stacking, folding, rolling etc. there is no irregularity and thus no unnecessary gaps between the individual parts available. At the same time it is possible by using equally sized Share the price of the same and thus the price of the overall construction sn low as possible. Of course you can e.g. with corresponding Static requirements the dimensioning of the parts the course of the moment line correspond and thus be unequal. It goes without saying that all only conceivable shapes of the individual members are within the scope of the invention.

It is advantageous that the individual pivot axes are preferably parallel run towards each other. With such a course of the pivot axes is a straight one Extending the support arm device guaranteed. Straight means that the Support arm device can be extended at least within a vertical plane can. Of course, it can also be done simultaneously within a vertical plane and extended within a plane perpendicular to and through it will. If the pivot axes do not run parallel to one another, a Support arm device within a horizontal plane and extended in a curve will.

It is advantageous that the pivot axes are in the extended state the support arm device extend at right angles to their longitudinal extension. at Such an embodiment can have two adjacent, identically dimensioned links be placed on top of each other by pivoting movement so that they are perfectly aligned with each other cover. This guarantees that the individual members of the invention Support arm device within one level one above the other and fully overlapping one another can be kept.

It is from advantage 1 that the pivot axes in the extended state the support arm device run at an acute angle to its longitudinal extension. At a Such an embodiment, adjacent links can be stored so that they cover each other only to a small extent. The swivel axes thus run 1lnd the individual songs laterally offset to one another. This guarantees that the individual links of the support arm device according to the invention lying next to one another can be kept.

It is advantageous that each joint is an independent joint unit is formed and fixed to two adjacent links. Such an embodiment makes it possible to manufacture lots of similar joint units in series and with To fix the individual links with the help of gluing, riveting, etc. The respective The joint unit can also be used with the aid of a the joint unit overlapping plate be fixed. The joint units even, for example, as a rope strip joint, as a Texband joint, as a steel band joint, be designed as a hinge joint, a ball joint, etc.

It is advantageous that each individual link is preferably frontal Has connecting parts which represent a joint in the interconnected state. Such an embodiment can be designed so that the individual links are louder Have similar connecting parts, which with the help of a further connecting element be articulated together. This is e.g. B. with chain link-like connecting parts the case, which are articulated with the help of a pin. Next to it it is but also possible, associated connecting parts in different, one another to train complementary form. This can be B. by training a part as Swivel axis and another part take place as a swivel axis holder. Are the Connecting parts attached to or in the area of the end face can be their Length dimensions are kept extremely small. This means that the cost of materials and Low costs.

It is advantageous that each single joint part of a entire length of the extendable support arm device extending flexible tension element is, which is preferably fixed immovably on all individual links. at In such an embodiment, the individual links are along a straight line lined up; the flexible tension element is guided along this straight line and at the same time on the SinzeJ members immovably fixed. All of them lie there possible Kixierungsarten within the scope of the invention. To the function of a carrier to meet, all individual links must be connected to the flexible tension element. It is advisable to design the individual links in such a way that they act on the tension element can be threaded and are thus connected to it in a freely movable manner. Only the first and last link of the support arm device must absolutely be immovable be connected to the tension element so that compression members and tension element become one unit get connected. It has now been shown on the basis of tests that it is with large Loads is expedient, at least some of the between the first and last link to connect located links immovable with the tension element. On the one hand therefore, in order to distribute the occurring forces to some connecting elements, on the other hand, to avoid excessive movements of the individual limbs during to prevent the extension process along the tension element.

It is advantageous to have the extendable support arm device on a supply roll to keep it windable and unwindable. Such an embodiment guarantees an extremely rapid extension and retraction of the support arm device, as a speed of rotation of the winding axis there are no limits. In addition, with an appropriate configuration of the supply roll z. B. with formed as discs side cheeks tilting or jamming the individual links excluded from each other and thus a safe and trouble-free Extension and retraction of the support arm device guaranteed. In the context of such a Training can operate the support arm device in a variety of ways take place. On the one hand, the support arm device can with the help of one at the free end of the same attacking and appropriately directed force are extended and retracted. To the others can operate fully and qan via a correspondingly directed rotation the winding axis. A third possibility is to use a transport device, z. B. a gear to wind up and unwind the support arm device. The can accordingly necessary work can of course be done by hand or motorized.

It is advantageous that the supply roll is fixed in place and the free end of the support arm device is movable with respect to the supply roll. Such an embodiment is always appropriate when the support arm device can be withdrawn from a housing for optical or functional reasons only can be provided with a narrow slot, the dimensions of which the passage Allow the support arm device only in the unrolled, already stiffened state, Such an embodiment is also useful when the support arm device when extending, narrow or narrow channels must be passed or the one available Space is generally very small. If the weight of the wrap is relatively large, you can use it such a training the occurring moments can be kept relatively small.

It is advantageous that the free end of the support arm device is stationary is fixed and the entire supply roll is movably held with respect to this end is. Such an embodiment is appropriate when there is no room for one Fixed rewinder with or without a housing is available. Simultaneously Such an embodiment is expedient if the mechanical effort in the area of the roll and in the context of the winding and unwinding process shall be. Because in this way the entire lap can be compared with a rolled up carpet, unwind by being pushed in the appropriate direction will wind up again and vice versa. On a winding axis, a winding axis holder and corresponding fastening parts can be completely dispensed with.

It is advantageous that the individual links of the support arm device around a horizontal winding axis and in superimposed, spiral-shaped layers can be wound in a vertical plane. Such an embodiment takes place generally used where support arm devices due to space constraints can only be rolled up into narrow, upright rectangular boxes. In addition, such a configuration is useful if at one or between several support arm devices fanning parts are to be attached, the infilling parts preferably over the entire length of the support arm device whose limbs are firmly connected. Material webs can be used as infill parts or individual strip-shaped elements are used, these elements being one below the other connected, similar to roller shutter slats, or can be disconnected.

It is advantageous that the individual links of the Tragarmvorin direction around a horizontal winding axis and layers adjacent to one another in the axial direction are wound in a helical course. Such an embodiment is generally used where support arm devices due to corresponding Space conditions in the wound state only a very small height and width may have. In addition, such a configuration can also be expedient if one or more support arm devices are only attached to their foremost links infill parts may be connected and / or not on the winding axis of the Support arm device may be wound up. Is the end link of the support arm device Fixed immovably on the winding axis, the free end of the support arm device moves when unwinding and when winding the same on a parallel to the winding axis such that it is in the direction of point F when unwinding and when winding moves in the opposite direction. If this effect is undesirable, the support arm device be mounted on a piece of pipe, which sits on the actual winding axis. This piece of pipe is connected to the winding axis in such a way that that it the movement of the itself through corresponding proper movement along the winding axis up and unwinding support rod with respect to the point F compensates and thus the Support rod extends and retracts on the same line.

It is advantageous that the pivot axes of the individual joints in the extended state of the support arm device lie on a straight line. Any pivot axis is assigned to a corresponding swivel joint. Every swivel joint connects at least two adjacent individual links to one another. This is about one of the swivel axes connecting line of the course of the support arm device precisely defined. Runs the straight line connecting the pivot axes extends the support arm device also straight when extended.

Since a straight line is the shortest connection between two points, a Such an embodiment of the support arm device a predetermined distance with the smallest possible Bridge length expenditure and thus the smallest possible material expenditure. Likewise Such an embodiment is appropriate when in a combination of several support arm devices a support pillar-like element is formed, preferably extending upwards or downwards shall be.

It is advantageous that the pivot axes of the individual links in the extended state of the support arm device lie on a curve. Any pivot axis is assigned to a corresponding swivel joint. Every swivel joint connects at least two adjacent individual links to one another. This is about one of the swivel axes connecting line precisely defines the course of the support arm device. Does the the line connecting the pivot axes is curved, the support arm device extends in the extended state of the same also curved. It is useful at to choose such a structural shape, particularly high static loads because a curve designed as an arc has particularly favorable static properties This means that very large span widths are possible.

It is also useful wherever there is a room at the same time should be limited in the horizontal and vertical plane, curved Use support arm devices. Because with it the desired demarcation can with Can be achieved using a single element that is curvilinear from the vertical transferred to the horizontal and is therefore very inexpensive.

Above all, optically appealing solutions are created in this way conceivable which the flexibility of the construction is disadvantageous in the smallest way influence. The formation of curved support arm devices can thereby take place in that the individual links in the vertical section trapezoidal shape and thus have at least one inclined stop surface. You can also do this take place that z. B. Individual links in the area of their tension zone at a distance from one another are fixed. It goes without saying that the curve-like course can be any.

It is advantageous that the extended support arm device is in Distance and above a parallel to it and through the winding axis Line extends. The extendable support arm device can only be rolled up in this way be that the respective tension zone of a certain support arm section of the winding axis closer than the assigned pressure zone. For this reason, has one above the winding axis extended support arm device has a lower tension zone and an upper one Pressure zone. Such an embodiment thus always represents a single or multi-span beam For this reason, such an embodiment should always be selected if single or multiple span girders have to be formed. Of course one can support arm device configured in this way horizontally or at an angle to the horizontal get lost.

It is advantageous that the extended support arm device does not at a distance from and below a parallel to it and through the winding axis Line extends. The extendable support arm device can only be rolled up in this way be that the respective tension zone of a certain support arm section is closer to the winding axis than the assigned pressure zone. For this reason owns a support arm device extended below the winding axis an upper tension zone and a lower pressure zone. Such an embodiment thus always represents one Cantilever. For this reason, such an embodiment is always to be chosen if a cantilever has to be formed. Of course one can support arm device designed in this way horizontally or at an angle to the horizontal get lost.

It is advantageous that preferably all the individual links of the support arm device are lined up freely movable in the area of their pressure zone on a tension element, which is fixed at least at one end of the support arm device and by means of a Clamping device is tensionable. In this way it is prevented that parts the support arm device by the weight opposing forces around their Swivel axes are swiveled upwards. Because this goal can only be achieved can, if the individual links are pressed firmly together, the process must of the pressing together in the area of the pressure zone and thus the tension element run in this zone. It is most useful to have a pulling element on one To fix the end of the support arm device immovably. At the other end it can on the other hand via a deflection device, e.g. B. loose role and with a jig be connected. If this clamping device is brought into the clamping position, all Individual links firmly pressed against one another and thus an upward pivoting of the support arm device prevented. Likewise, the tension element can be at both ends of the support arm device be fixed and the clamping device can be attached between the fixing points be. In order to ensure that the Rinzelglxeder pressing together, use the tension element zumindept with the two inden connected to the support arm device be. Especially when the support arm device has a curve-like course it may be useful to line up several individual links on the tension element so that the tension element runs in the area of the support arm device and is not straight and thereby possibly extending from end point to end point of the support arm device in a blocking manner.

It is advantageous that the support arm device is preferably in the area their winding axis has a support part. In this way, the support arm device in the form of a cantilever beam and in the form of a single or multiple field beam against partially the effect of weight can be supported. Although there is a possibility to support the support arm device directly on the link winding, must at least Such a solution should be refrained from in the case of large loads, since it is proper Winding and unwinding is no longer guaranteed. It is useful to use the support part to be attached near the winding axis in order to reduce the space required in the retracted state of the To keep the support arm device as small as possible.

It is advantageous that the support arm device is in the area of its winding axis has a guide part. During the extension and retraction process of the support arm device this must be guided so that it can be extended in the desired direction can. For this purpose, the guide part with side cheeks and at least provided with a lower web. At the same time it must be guaranteed that the support arm device Not unintentionally when under load, e.g. by bulging in the area of the wrap ben is moved in the winding direction. For this purpose, there is a locking device in the guide part present, which prevents unintentional movement of the support arm device. aside from that jamming and / or tilting of the individual links is caused by the guide part made impossible. At the same time, the guide part should be a torsion of the whole Tragarmvorric'.htung around their longitudinal axis at least limit.

It is advantageous that the support arm device Abspann- undj or Has support elements. During extension and retraction and in the extended state the support arm device is subject to considerable loads in some cases. to the Aurnanme these loads, it is appropriate to the support arm device against the To support or brace the effect of weight. This is the easiest way to do this with pressure elements such as rods or tension elements such as ropes, straps. In order to form a single-span girder according to the invention, it must be at both ends to be possessed. At one end, the support is expediently carried out with the aid of the firmly attached support part. At the other end, the support must be with the Move the support arm device along with it. Accordingly, the meeting takes place with the help of in Extension and retraction device movable elements.

For absorbing torques when extending and retracting cantilever girders occur, it is advisable to use an anchoring element on the cantilever, e.g. anchoring rope, to be attached, which is moved accordingly when the carrier is extended and retracted.

The invention is shown below with reference to in the drawings Example examples explained in more detail. They show: FIG. 1 a perspective View of two individual members of a support arm device in the non-adjacent State of the attacks, Figure 2 is a schematic vertical section through two Links of a support arm device, according to a «.wide exemplary embodiment.

Figure 3 is a schematic vertical section through two members a support arm device, according to a third embodiment, figure 4 is a plan view of a partially extended support arm device, according to FIG first exemplary embodiment, FIG. 5 shows a plan view of a partially failed one Support arm device, according to a second embodiment, Figure 6 a vertical Section through a curved, partially extended support arm device, FIG. 7 shows a side view of a support arm device designed as a single-span carrier, Figure 8 is a vertical section through a straight line as a cantilever trained support arm device, Figure 9 is a vertical section through Figure 8 along the line I - I, which is the combined support guide part with gear and individual link represents.

Figure 1 shows two individual members 13, 14 of the support arm device 10, which are connected to one another in an articulated manner about a pivot axis 20. The single joint is part of a extending arm device over the entire length 10 extending flexible tension element 30. The flexible tension element 30 is included with the help of plates 31,32, which with rivets 37, 38, 39, 40 on the individual links 13,14 are fixed, connected to the individual links 13,14. The individual links 13, 14 are designed as sections of a rectangular hollow box profile. As notices 22, 23 are the cut surfaces of the individual links 13, 14.

Figure 2 shows two individual members 13, 14, which by means of a joint assembly 26 are pivotally connected to each other.

The hinge unit 26 is at the glued points by means of adhesive material 33, 34 connected to the individual links 13, 14. The stops 22, 23 lie against one another at. The individual links 13, 14 are designed as solid cuboid parts.

Figure 3 shows two individual members 13,14, which term by means of stirnsoi Connecting parts 27, 28 are pivotally connected to one another. The single link 13 is the pivot axis holder 27 and the individual link 18 is the pivot axis 28 assigned. The stops 22, 23 lie against one another in the contact area 7-7 of the same at. The front connecting parts 27, 28 are by means of rivets 35, 36 to the Individual links 13, 14 attached. The individual members 13, 14 are as sections of a formed on both sides nadh tapering hollow box profile. Are there the individual members 13, 14 arranged so that the profile cross-sections side by side are lined up.

FIG. 4 shows the extendable support arm device 10 in a partially extended position Condition of the same. The pivot axes 20 run parallel to each other and at right angles to the longitudinal extension of the support arm device 10. The individual links 13, 14 are held wound on a supply roll 50, which consists of a winding axis 51 and two side cheeks 53, 54 consists. The individual links 13, 14 are in this embodiment in a vertical plane and in a spiral shape one above the other running layers.

FIG. 5 shows the extendable support arm device 10 in a partially extended position Condition of the same. The pivot axes 20 run parallel and at an acute angle to Longitudinal extension of the support arm device 10. The indexing members 13, 14 are included on a cylindrical supply roll 52 held windable, the on your part is mounted on a winding axis, and by relative movement to the winding axis 51 compensates for the lateral offset of the support arm device 10 when extending and retracting.

FIG. 6 shows a curve which runs in a curve within a vertical plane Support arm device 10. The individual links 13, 14 of the support rod are designed in such a way that since they have a trapezoidal shape when cut vertically. The free end 19 of the support arm device 10 is fixed with the help of a shoe 57 fixed in place Plate 55 connected. The link winding 11 in the figure is still not completely unwound has a winding axle 51 which is fixedly mounted on the end link. Of this Winding axle 51 stretches a rope to a rope actuating device, o, by means of which the rope can be extended and retracted.

The winding axis 51 is thus either in the direction of arrow 84 or moved in the direction of arrow 85 and thereby the individual links 13, 14 unwound from an existing roll 11 or wound up to form a roll 11, whereby the winding at the entry and exit gate is on the one that has already been extended Part of the support arm device 10 supports.

FIG. 7 shows one which runs in a vertical plane and in a straight line Support arm device 10 designed as a single-span support. The housing 60 of the support arm device 10 sits firmly on a base 61. With the housing 60 and the base 61 Fixedly connected is a support element 62, which the support arm device 10 against supports the weight. The free end 19 of the support arm device 10 is on supported on a movable support part 63, which during the extension and retraction process moved with the free end 19. The movable support part 65 can move e.g. by means of rollers on a firm surface or by means of a floating substructure move in the water too.

FIG. 8 shows a completely extended support arm device 10. The strung together individual links 13, 14 are articulated by means of the flexible tension element 30 connected to the winding axis 51. The last three links of the support arm device 10, which are located in the housing 60, do not engage in a stiffening manner to each other. The next following front links have each other in their pivoting mobility blocked and are located within a combined support and guide part 64, 65. The displacement drive 66 in the form of a gear 72 engages from below through a slot 71 of the support part 65 directly into the at the bottom of the Individual links 13, 14 running row of teeth. From the area of the combined support part 65, guide part 64 towards the free end 19 extends a pulling element 67, the was tensioned by means of a tensioning device 68.

Figure 9 shows the mutual interlocking of the support part 65, guide part 64, individual link 13 and gear 72. The support part 65 is included provided with a recess 71 through which the gear 72 on the row of teeth of the respective individual member 13 engages, the guide part 64 closes in this Embodiment directly to the support part 65 upwards and is integral therewith tied together.

The individual member 13 can be within the support-guide part piece 65, 64 move slightly, has side walls and pelvic part of the guide part 64 little play and rests on the support part 65. Line 73 represents the The axis of rotation of the gear 72.

The mode of operation of the support arm device 10 is described below. It is assumed that the limbs are articulated 13, 14 existing support arm device 10 in superimposed, spiral-shaped Layers and is wound onto the supply reel 50 in a vertical scene and from this should be unwound], whereby the supply roll 50 stationary fixed and the free end 19 is movable relative to this. To unroll the articulated links 13, 14, the displacement drive 66 in Direction of arrow 69 set in action. The gear 72 engages the row of teeth of the foremost individual link 13. This makes the foremost link 13 and thus all interconnected links moved in the unwinding direction. The foremost link 13 is located within a combined support guide part 65, 64, through which all individual links 13, 14 move through it. The next following, with the foremost link 13 articulated Individual link 14, now leaves its spiral-shaped path as a result of the unwinding movement, to move on in a straight line. It becomes so about his with the first link 13 common pivot axis 20 pivoted that the associated Stops 22, 23 of the foremost 13 and the next following individual link 14 against one another get to the point. Thus, these two individual members 13, 14 are stiffening to each other. Now the gear 72 engages in the row of teeth of the next following link and transports this and at the same time all with the connected, wound and already unwound individual links in the unwinding direction.

If the support arm device 10 is to be wound up again, the Displacement drive 66 set in the opposite direction of the arrow in Tnffitigkeit. It will is in engagement with the gear 72 via the row of teeth assigned to it last link and thus all other links also moved in the winding direction. If the gearwheel 72 now engages on the preceding individual link, the winding movement takes place continued, the last link changing from a straight to a spiral Railway moves and thereby moves around the joint between it and the penultimate link Pivot axis 25 is moved until the application of the associated stops of the last and des before the next following link is completely canceled. This means that these two adjacent links are once again articulated with one another tied together.

For a very specific embodiment of the support arm device The mode of operation described in 10 is of course valid in an analogous manner for the other versions.

The generally horizontal winding axis 51 can of course also run at a limited angle, and thus inclined to the horizontal.

Claims (25)

Claims 1. Extendable support arm device, the Qusgefahren Condition is at least within limits in one direction of load bending and Forms buckling-resistant preferably freely cantilevered support rod, which consists of individual members consists, which are hinged together and when extending the support arm device attack each other stiffening by blocking their flexibility, g e k e n n n z e i c h n e t d u r c h stops 22, 23 of the members 13, 14, on their each at closing ends, the stops 22, 23 in the extended State of the support arm device 10 rest against one another and the links 13, 14 against one another support and that the two links 13, 14 interconnecting joints are designed as tensile force transmitters. 2. Support arm device according to claim 1 d a d u r c h g ek e n n z e i c h n e t that the joints are preferably designed as swivel joints 25. 3. Support arm device according to claim 1 d a d u r c h g e -k e n n z e i c h n e t that the stops 21, .22, 23, 24 have shrouds or surfaces. 4. Support arm device according to claim 1 and 3 d a d u r c h g e k e n n z e i c h n e t that the stops 21, 22, 23, 24 as preferably frontal Plates 75, 76 are formed. 5. Support arm device according to claim 1 to 4 d a d u r c h g e k e It is noted that the swivel joints 25 are at a distance from the contact area 77 of two stops 22, 23 are attached. 6. ragarm device according to claim 1 d a d u r c h g e -k e n n z e i c h n e t that the individual members 13, 14 preferably have the same dimensions own. 7. Support arm device according to claim 1 or 2 d a d u r c h g e k E n n z e 1 c h n e t that the pivot axes 20 are preferably parallel to one another get lost. 8. Support arm device according to claim 1 or 7 d a d u r c h g e k It is noted that the pivot axes 20 in the extended state of the support arm device 10 extend at right angles to their longitudinal extension. 9. Support arm device according to claim 1 or 7 d a d u r c h g e k It is noted that the pivot axes 20 in the extended state of the support arm device 10 run at an acute angle to their longitudinal extension. 10. support arm device according to claim 1 to 9 d a d u r c h g e k e n n z e i c h n e t that each swivel joint 25 as an independent joint unit 26 and is fixed to two adjacent links 13, 14 each. 11. Support arm device according to claim 1 to 9 d a d u r c h g e k e n n z e i c h n e t that each individual link 13, 14 preferably front-side Verbj.ndunste5le 27, 28, which in the interconnected state form a swivel joint 25. 12. Support arm device according to claim 1 to 9 d a d u r c h g e k e Note that each swivel joint part of one extends over the entire length he is nusfahrbaren support arm device 10 extending flexible tension element 30, which is preferably fixed immovably on all individual links 13, 14. 13. Support arm device according to claim 1 to 12 d a d u r c h g e k It is noted that the extendable support arm device 10 is on a supply roll 50 is held up and unwindable. 14. Support arm device according to claim 1 to 13 d a d u r c h g e k It is noted that the supply roll 50 is fixed in place and the free one End 19 of the support arm device 10 is movable with respect to the supply roll 50. 15. Support arm device according to claim 1 to 13 d a d u r c h g e k It is noted that the free end 19 of the support arm device 10 is stationary is fixed and the entire supply roll 50 is movably held with respect to this end is. 16. Support arm device according to claim 1 to 15 d a d u r c h g e k It is noted that the individual links 13, 14 of the support arm device 10 around a horizontal winding axis 51 and in superimposed, spiral-shaped Layers can be wound in a vertical plane. 17. Support arm device according to claim 1 to 15 d a d u r G h g e k E n n e n g e n e t that the individual links 13, 14 of the support arm device 10 around a horizontal in the winding axis 51 and adjacent to one another in the axial direction Layers can be wound in a helical course. 18. Support arm device according to claim 1 to 17 d a d u r c h g e k It is indicated that the pivot axes 20 of the individual pivot joints 25 in the extended state of the support arm device 10 lie on a straight line. 19. Support arm device according to claims 1 to 17 d a d u r c h g e k It is noted that the pivot axes 20 of the individual pivot joints 25 lie on a curve in the extended state of the support arm device 10. 20. Drag arm device according to claim 1 to 19 d-a d u r c h g e k It is noted that the extended support arm device 10 is at a distance and above a line running parallel to it and through the winding axis 51 70 extends. 21. Support arm device according to claim 1 to 19 d a d u r c h g e k It is noted that the extended support arm device 10 is at a distance and below a line running parallel to it and through the winding axis 51 70 extends. 22. Tragarmvorrichtne according to claim 1 to 21 d a d u r c h g e k e n n z e i c h n e t that preferably all individual links 13, 14 of the support arm device 10 lined up on a tension element 67 so that they can be freely displaced in the area of their pressure zone 78 are, which is fixed at least at one end of the portable device 10 and can be tensioned by means of a tensioning device 68. 23. Support arm device according to claims 1 to 22 d a d u r c h G It is not noted that this is preferably in the area of its winding axis 51 has a support part 65. 24. Support arm device according to claim 1 to 23 d a d u r c h g e k -e n n n z e i c h n e t that the Tragnrmvorricbtung 10 in the area of its winding axis 51 has a guide part 64. 25. Support arm device according to claim 1 to 24 d a d u r c h g e k It is noted that the support arm device 10 bracing and / or support elements 62 owns.