DE102018112691A1 - Device for deploying a mast - Google Patents

Abstract

The invention relates to a device for unfolding a rolled elongated hollow body comprising: at least one elongated hollow body, a deployment mechanism having a winding core on which the at least one elongated hollow body is rolled up in a first state and by turning the at least one elongated hollow body from the rolled up first state to a rolled-up and unfolded second state, and - a locking device which locks the winding core in an end position when the at least one elongate hollow body is completely unrolled and transferred to its second state, the locking device having at least one locking arm , which is designed to be movable relative to the winding core and is pressed by means of an elastic spring element in the direction of the winding core, wherein in the lateral surface of the winding core is provided at least one recess into which the at least one Ar retierungsarm by the elastic spring element positively engages when the at least one elongated hollow body is unrolled from the winding core and transferred to its second state, so that the winding core is locked by the at least one locking arm in the final position form-fitting manner.

Description

The invention relates to a device for deploying a rolled elongated hollow body, in particular a deployable mast.

Since the beginning of space travel, masts have been used as a support for sensors and instruments as a support structure for solar arrays, antennas and solar sails and for other applications. However, since even today, the transport of goods, such as satellites, are subject to a strict weight and space restriction, stand out from the cargo outstanding masts a significant problem. Therefore, very often deployable masts are used, which initially in a rolled up condition for the Transport to space are then unrolled and unfolded at the destination, whereby they can receive their corresponding stability and support the appropriate instruments, sensors or solar sails.

As a rule, such an expandable mast consists of an elongated hollow body whose cross-section is designed such that the elongated hollow body can be formed into a flat band. Depending on the construction, this flat band has the tendency to unfold and thus form the corresponding cavity within the elongated hollow body.

In the context of the present invention, an elongated hollow body is therefore understood to mean a component which can be present both in the unfolded and in the rolled-up state and has no hollow space when rolled up. The term "elongated hollow body" defines in the widest sense the ability to form such a cavity within the elongated hollow body, namely, when the elongated hollow body is unrolled and unfolded or is.

Such an elongate hollow body, which is to be used as a deployable mast, especially in aerospace, is usually rolled up on a winding core, whereby it is inevitably present rolled up as a flat band corresponding to the winding core. If the winding core is now rotated in a predetermined direction, the rolled elongated hollow body is transferred from its rolled-up first state into a rolled-up and unfolded second state, during which the elongated hollow body again assumes and unfolds its original cross-sectional shape during unrolling from the winding core, and thus forms the cavity within the elongated hollow body.

Such deployable masts are usually made of thin-walled shells made of metal or fiber composites, with the individual shells deform elastically due to their small wall thickness to a flat band and thereby can roll up space saving on the hub. There are basically two types of deployable masts, which are also called shell masts, namely those with an open and a closed cross-sectional profile. With an open cross-sectional profile, the deployable mast has an elongate opening or slot in the cross-sectional profile, allowing the mast to roll up and deploy better. Such deployable masts with an open cross-sectional profile can be unfolded to a single-layer tape, which can be much more space-saving roll on the winding core.

In contrast to this, deployable masts with a closed cross-section have no such axial slits, which in principle unfolds a more stable structure, which, however, can no longer be rolled up onto the winding core in a single layer. The radial space around the winding core therefore limits the length of the rolled-up shell mast with a closed cross-section significantly more than with the deployable mast with an open cross-sectional profile.

Structurally critical in such elongated hollow bodies, which are to be used as deployable masts, is the transition region between the still rolled up part of the hollow body on the one hand and the already fully unfolded portion of the hollow body on the other. In this transition region, the cross section of the elongated hollow body is not fully developed, whereby both the rigidity and the stability is substantially reduced. In practice, therefore, the transition region is stabilized from the outside with other supporting elements, such as external shell molds or external guide rollers, so as to be able to remove the generally higher loads during deployment in the transition region accordingly.

Shell pylons with open cross-sectional profile allow it to be supported from the outside by shell molds and from the inside by a connected to the outer shell moldings core, since the core can be fixed by the lateral opening of the mast to the outside. As a result, the profile of the mast is very well protected against deformation under load, such as the formation of dents, and restricted in the transition area. This results in a desirable stiffness and stability. A disadvantage of masts with open profile, however, is the lower torsional stiffness, especially during the unfolding process. As a result, this type is sensitive to bending roll creases, especially in slender long masts.

This disadvantage do not have deployable masts with closed cross-sectional profile, which are structurally significantly more efficient at high slenderness in long lengths. The disadvantage, however, is that the support of the transition region is further difficult, since a support by shell molds can only be done from outside due to the closed cross-sectional profile. As a result, deformations that form due to stress can form unimpeded inwardly, as a result of which the rigidity and the stability of the mast in the transition region can be reduced until then.

The unfolding of the masts by the deployment mechanism is carried out by directly driving the winding core or other special funding mechanisms that attack the masts or parallel wound tension straps. During deployment, the masts are usually unwound directly and tangentially from the winding core, whereby the mast axis has a certain distance from the winding core axis. By using this distance, when using multiple masts with a common winding core always bending moments act on these even in the case of purely axially introduced forces. However, in the development of deployable systems with deployable hollow bodies bending load cases are avoided as possible and Axiallastfälle strived for as lighter structures can be realized and requirements for the support of the fattening root can be reduced.

Finally, at the end of deployment, a locking of the winding core and the mast root of the respective hollow body must be carried out by additional components in order to produce a rigid and stable mechanical connection to the respective supporting system.

The primary application of such rollable hollow bodies or masts takes place in missions with particularly strong volume restrictions to the jammed system. This poses the problem that there is not enough space to make the components functionally optimal. Moreover, in systems with multiple masts per hub, the additional bending loads resulting from axial forces result in a load case unfavorable to the masts, resulting in a large reduction in the structural efficiency of the overall system.

Against this background, it is an object of the present invention to provide an improved device for deploying rolled elongated hollow bodies, in particular deployable masts for aerospace, which achieves a high structural efficiency during and after completion of the deployment even with a strong volume restriction for the entire system.

The object is achieved with the device according to claim 1 according to the invention. Advantageous embodiments of the invention can be found in the corresponding subclaims.

According to claim 1, a device for unfolding a rolled elongated hollow body is proposed, wherein the device generically has at least one elongate hollow body which has either a closed or an open cross-sectional profile. Furthermore, the device has a deployment mechanism which has at least one winding core on which the at least one elongated hollow body is rolled up in a first state and which is transferred by the at least one elongated hollow body from the rolled-up first state into a rolled-up and unfolded second state.

Accordingly, in the context of the present invention, an elongate hollow body is understood as meaning a component, in particular a mast-shaped component, which can be converted into a flat band as well as having a stabilizing cross-section with a cavity. Accordingly, the elongated hollow body is rollable on a winding core, whereby the elongated hollow body is formed into a flat band, for example by unfolding with an open cross-sectional profile or by compression in a closed cross-sectional profile. If the elongate hollow body then unrolled in this flat band-shaped state, it unfolds and thus forms a cavity within the elongated hollow body. Accordingly, the wound on the winding core and rolled up body is understood as a hollow body according to the present invention, since it has the corresponding cavity at least in the second state.

Furthermore, the device has a locking device which locks the winding core in an end position when the at least one elongated hollow body is completely unrolled and transferred to its second state. This locking device thus ultimately serves to produce a rigid and stable mechanical connection.

According to the invention, the locking device has at least one locking arm, which is designed to be movable relative to the winding core and is pressed by means of an elastic spring element in the direction of the winding core, and wherein in the lateral surface of the winding core at least one recess is provided, into which the at least one locking arm by the elastic Spring element positively engages when the at least one elongated hollow body is unrolled from the winding core and transferred to its second state, so that the winding core through the at least one Arretierungsarm is locked positively in the end position.

This makes it possible to firmly lock the deployment mechanism in the final position and at the same time exert corresponding constraining forces on the rolled-up or the hollow body in order to prevent a radial unrolling of the rolled-up hollow body. Because the Arretierungsarm, which is pressed by means of an elastic spring element in the direction of the winding core, not only locks the winding core when reaching the end position, but also pushes the still rolled up hollow bodies this to the winding core, so that rolled up on the winding core hollow body due to the elastic Spring element can not handle by itself from this.

Thus, two functions can be integrated by means of the locking arm, namely the application of constraining forces to the still-rolled hollow bodies and the locking in the final position after deployment, whereby such deployment mechanisms are very robust and space-saving and are particularly well suited for applications with a large volume restriction ,

The axis of rotation of the locking arm is parallel to the axis of rotation of the winding core, so that the locking arm is always pressed in the direction of the winding core due to the elastic spring element. If the hollow bodies are unrolled from the winding core, then the diameter of the winding core with the rolled-up hollow bodies decreases continuously, whereby this reduction of the diameter is counteracted by the elastic spring element, with which the locking arm is pressed against the winding core, and that until all Hollow body of the winding core are unrolled and unfolded and engages the locking arm in the corresponding recess provided in the lateral surface of the winding core and locks it in the end position.

Consequently, the locking arm is pressed in the rolled-up first state by means of the elastic spring element in the direction of the winding core on the still rolled-up hollow body and touches them continuously during the unfolding process, in which the elongated hollow body or bodies are transferred from the rolled-up first state to the unrolled and unfolded second state , After the last remaining portion of the elongated hollow body has been unrolled from the winding core, the Arretierungsarm touches the mantle surface of the winding core, since it is pressed continuously due to the spring element in the direction of the winding core. If the winding core now rotates a little further, the locking arm engages in the recess provided in the lateral surface of the winding core and positively locks the rotational movement of the winding core in the predetermined end position.

The winding core is in particular a circular cylinder whose cross-section is correspondingly deformed by the recesses provided in the lateral surface of the circular cylinder.

The locking arm can be, for example, an elongated, straight or curved element which contacts the winding core or the hollow bodies rolled up on its opposite end of the rotatable support and has a corresponding shape which can be accurately inserted into the savings provided in the lateral surface of the winding core ,

The device can be designed so that on the winding core two, three, four or more elongated hollow bodies are rolled or rolled up in a respective first state, wherein by rotating the winding core all elongated hollow body of the first state in the respective unrolled and unfolded second Condition are transferable. Due to the fact that all elongated hollow bodies are fixed to the winding core at one root side, upon rolling up the elongated hollow body, i. by rotating the winding core opposite to the direction of rotation for unfolding the elongated hollow body, each elongated hollow body placed over the respective subsequent hollow body, so that all elongated hollow body are rolled up in the manner of a screw on the winding core.

As a rule, the deployment mechanism has a guide device arranged at a distance from the winding core for each elongated hollow body, through which the respective elongated hollow body is deployed in the predetermined deployment direction and moved away from the deployment mechanism. This guide device generates desired constraining forces by which, when the elongate hollow bodies are rolled up, they are always wound onto the winding core at a predetermined tangential position. At the same time be achieved by these guide means, such as guide rails or sleeves or shells with a corresponding cross-section of the hollow body that extends during unrolling and unfolding of the respective hollow body by rotating the winding core, the respective hollow body in the predetermined direction. As will be explained later, it may be advantageous in this case if the locking arm is rotatably arranged on such a guide device of a respective hollow body.

In a further advantageous embodiment, the locking device has two, three, four or more locking arms, wherein in the lateral surface of the winding core at least as well many recesses are provided as Arretierungsarme are present. Each of the locking arms engages in a corresponding recess when the at least one elongated hollow body is unrolled from the winding core and transferred to its second state, so that the winding core is locked in a form-fitting manner by the respective locking arms in the end position.

It is particularly advantageous if just as many locking arms are present, such as elongated hollow bodies are rolled up on the winding core, each locking arm in the rolled-up first state of the elongated hollow body each contacting one of the elongated hollow body, wherein the locking arms each contact different elongated hollow body. For example, if four elongated hollow bodies rolled up on the winding core, the locking device preferably also four locking arms, wherein the lateral surface of the winding core has a total of four recesses. The first locking arm contacted in the rolled-up first state, the first elongated hollow body, while the second Arretierungsarm contacted a second elongated hollow body, while the third Arretierungsarm contacted a respective third elongated hollow body and the fourth Arretierungsarm each fourth elongated hollow body. After rolling all elongated hollow body, all four locking arms then engage in the respective recess in the lateral surface of the winding core and thus lock together the winding core in its present end position.

In a further advantageous embodiment, the at least one recess has a first side wall and a second side wall opposite the first side wall, wherein the side walls form a radial boundary of the depression of the recess present in the winding core. The side walls thus extend from the outer circumferential surface in the direction of the inner winding core, but need not necessarily point directly towards the center of the winding core.

The respective locking arm engages between the two side walls when the at least one elongated hollow body is unrolled from the winding core and transferred to its second state, the second side wall advantageously being curved in the direction of rotation, so that the respective locking arm adjoins the second curved side wall in FIG the arresting end position is guided along by means of a rotary movement of the winding core. In this way, the insertion of the locking arm is simplified in the recess in the winding core, wherein preferably then the locking arm abuts positively on the opposite first side and thus locks the winding core in the end position.

Accordingly, it is provided in this embodiment that, starting from the lateral surface, the side walls move towards one another in the direction of the inner winding core, and thus the recess tapers, starting from the lateral surface, in the direction of the inner winding core. In this way, the locking arm can be gently inserted into the recess due to the curvature of the second side wall and finally engage the bottom of the recess in a form-fitting manner.

Advantageously, while the first side wall is straight and has no curvature, so that the locking arm can strike four accordingly. In an advantageous embodiment, however, it can also be provided that the first side wall has a shape which corresponds to the shape of the locking arm, so that such a locking arm then rests in the locking end position in a form-fitting and full-surface manner on the first side wall.

In a further advantageous embodiment, the at least one elongated hollow body is fastened to a root side or a root region in the at least one recess, wherein preferably all elongated hollow bodies are fastened in one of the recesses. In this case, it can be particularly advantageously provided that the at least one elongate hollow body is fastened to the root side in a base region of the recess.

In this way it can be achieved that the distance between the axis of the winding core on the one hand and the attachment of the respective elongated hollow body to the winding core on the other hand is reduced and in particular smaller than the radius of the winding core, which resulting from axial forces bending moments are significantly reduced. Since usually the axis of the winding core is the force-transmitting element for such axial forces can be reduced by reducing the distance, the resulting bending moments.

In a further advantageous embodiment, each of the elongate hollow bodies in each case has a support device which can also cooperate with the guide device already described. The support means in this case has an elongated support shell which is arranged to be rotatable spaced from the winding core and extends in the axial direction with respect to. The elongated hollow body to the winding core. The support shell simultaneously forms the respective locking arm and engages in the corresponding recess in the lateral surface of the winding core, when the respective elongated hollow body is unrolled from the winding core and transferred to its second state, so that the winding core through the respective support shell as locking arm is locked in a form-fitting manner in the end position.

The support shell of the support device serves to support the unfolding mast in the already mentioned transition region, since in this transition region of the elongated hollow body has not yet formed its final cross-sectional profile and consequently has not reached its final stability. The support shell serves in particular to absorb the bending moments resulting from the axial forces acting upon deployment of the elongate hollow body and thus avoid kinking, bulging or pushing in of the elongate hollow body in the still structurally weak transition region of the elongate hollow body.

If the locking arm is designed in the form of a support shell which simulates a negative mold of a part of the elongated hollow body in the transitional area on an inner side, such a construction can be used to realize a further functional integration, namely the support of the transitional area, with only a single mechanism the supporting shell can be applied as a locking arm constraining forces on the still elongated hollow body, the transition region supported accordingly during deployment and the entire system can then be locked in an end position using the recesses in the hub.

The support shells can be arranged on a provided guide device, wherein the guide device in turn rotatably mounted and the unfolding elongated hollow body is forced along along the guide shell due to the guide means.

The elastic spring element exerts a torque on the respective support shell in the direction of the winding core.

The respective support shell can completely enclose the elongated hollow body at least in sections and thus forms a leading function in addition to a pure supporting function.

The support means may further comprise an inner support member disposed in a cavity within the elongate body and at least partially abutting the inner wall of the elongated hollow body, and having an outer fixing member disposed outside the elongate hollow body in the region of the inner support member. so that the elongated hollow body can be guided between the outer fixing element and the inner supporting element, the inner supporting element cooperating with the outer fixing element in the axial direction in a positive and non-positive manner for axially fixing the position of the inner supporting element without being directly mechanically connected thereto. As a result, the elongated hollow body can be supported from the inside without the inner supporting element being mechanically connected directly to the outer fixing element. Hereby, in particular, elongated hollow bodies with a closed cross-sectional profile can also be supported from the inside, wherein the inner supporting element is fixed at its axial position due to the force and / or positive connection with the outer fixing element. As a result, in particular, the elongated hollow body can be supported in a transition region from the inside, where the later cross-sectional shape has not yet completely formed.

In a further advantageous embodiment, the support device has at least one positive locking mechanism, each having at least two positive locking elements, wherein the first positive locking element is arranged on the support member and the second positive locking element on the fixing element, so that between the first and the second positive locking element of the elongated hollow body can be passed is, wherein the first positive locking element forms a positive connection with the second positive locking element in the axial direction of the elongated hollow body.

By this positive connection of the elongated hollow body in the region of the support element and fixing element is slightly pressed, being held axially in its position by the positive interaction of the two positive locking elements.

The form-locking elements can be formed roller-shaped. It is also conceivable, however, for the interlocking elements to be sliding elements which, at least in sections, have a curved surface with which they make contact with the elongate hollow body.

In this case, a third positive locking element may be provided, which is either arranged on the support element and positively cooperates in the manner of the first positive locking element with the second positive locking element or which is arranged on the fixing and positively cooperates in the manner of the second positive locking element with the first positive locking element.

It is also conceivable that the support means has a plurality of such positive locking mechanisms, each having at least two positive locking elements.

In this case, at least two of the interlocking mechanisms can be arranged such that the plane of the contact surface of the interlocking elements of the first interlocking mechanism at an angle less than 180 ° to the plane of the contact surfaces of the interlocking elements of the second interlocking mechanism.

However, it is also conceivable that the levels are parallel.

Furthermore, it is conceivable that the inner supporting element has a sliding surface on which the inner wall of the elongated hollow body slides during the transfer of the elongated hollow body from the first state to the second state for stabilizing the shape. The sliding surface can be conically shaped in the deployment direction.

Furthermore, the inner support member may have one or more support rollers or support sliders which contact the inner wall of the elongated hollow body when transferring the elongated hollow body from the first state to the second state for stabilizing the shape. Counter rollers or counter-slides may also be provided on the fixing element, which are arranged such that the fixing element of the elongate hollow body can be guided in contact with one another between a support roller / support slide and a counter roller / counter conductor, without a form fit being formed.

The elongate hollow body (s) may be made from a fiber composite material comprising a fiber material and a matrix material embedding the fiber material. It is also conceivable that the elongated hollow body is made of a metal material.

Advantageously, all components of the device, i. the deployment mechanism with the winding core and the locking device, arranged on a fixed support structure and so immovable relative to each other, with the exception of the rotatably mounted Arretierungsarmes. However, here too the axis of rotation of the locking arm is immovable relative to the axis of rotation of the winding core.

• 1a, 1b) - perspektivische Darstellung der Vorrichtung mit Entfaltungsmechanismus;
• 2 - Querschnittdarstellung eines Wickelkerns;
• 3a), 3b) - Draufsicht auf den Entfaltungsmechanismus in zwei Zuständen;
• 4a), 4b), 4c) - Vereinfachte Darstellung des Verriegelungsvorgang.

The invention will be explained by way of example with reference to the attached figures. Show it:

• 1a . 1b) - Perspective view of the device with deployment mechanism;
• 2 - Cross-sectional view of a winding core;
• 3a) . 3b) Top view of the deployment mechanism in two states;
• 4a) . 4b) . 4c ) - Simplified representation of the locking process.

The following description of the figures assumes a device with which a total of four elongate hollow bodies in the form of deployable masts can be brought from a rolled-up first state into a deployed second state. However, the invention is not limited to the number of four deployable masts. Rather, the mechanism according to the invention is applied separately and individually to each individual elongated hollow body, so that the illustrated operating principle can also be applied to one, two, three or more than four masts.

1a) shows in a perspective view of the device 10 that a deployment mechanism 11 Has. The device 10 has a support structure for this purpose 12 on, at which the appropriate deployment mechanism 11 is arranged. For a better representation of the deployment mechanism 11 are in 1b) some parts of the support structure 12 Not shown.

On the support structure 11 is a rotatably mounted winding core 13 provided, on the lateral surface thereof 14 the four elongated hollow bodies 15 , exactly 15a ) 15b ) 15c ) 15d ) together as 15 be designated fixedly and in a rolled-up, not shown, first state on this lateral surface 14 rolled up. The 1a) and 1b) show the unrolled and unfolded second state of the elongated hollow body 15 that from the hub 13 unwound or unrolled and wherein the winding core 13 , as will be shown later, is positively locked in its final position.

For each of the individual elongated hollow bodies 15 is a guide device 16 provided, accurate guidance device 16a for the elongated hollow body 15a etc, which is designed in the form of a cup-shaped sleeve so that the respective elongated hollow body 15 through an internal passage of the guide device 16 can be passed. The inner wall of the guide device 16 has a shape that the outer shape of the respective unfolding elongated hollow body 15 corresponds to this position. In the embodiment of 1a) and 1b) as well as in the following illustrations, the guide devices are in a corner region of the support structure 12 arranged and are intended in particular to cause the elongated hollow body 15 be unrolled in their predetermined and intended unfolding direction.

At these cup-shaped guide devices 16 each includes a support element 17 that is different from the leadership facility 16 in the direction of the winding core 13 elongated and cup-shaped. This support element 17 can be supported by rollers, rollers or sliding elements.

This support element 17 at the respective management facility 16 is arranged, has essentially three main tasks. First, by the support element 17 the unfolding elongated hollow body 15 in the transition region between the winding core 13 and leadership facility 16 be supported, so in particular lateral forces and bending moments, in this transition region due to forces applied to the respective elongated hollow body 15 act, can be removed.

Furthermore, the support element serves 17 as a locking arm or locking arm of a type locking device to the winding core 13 to lock positively in an end position. For this purpose, the free end of the support element engages 17 in recesses of the winding core 13 a, like in 1b) is shown, and locks this in its final position form-fitting.

Finally, using the support element 17 corresponding constraining forces are exerted on the rolled-up hollow bodies in the direction of the winding core, so that they are not within the supporting structure 12 Unroll involuntarily. This is the leadership device 16 on which the support element 17 is arranged, by means of a rotary bearing rotatably mounted on the support structure 12 arranged so that by means of a spring element, not shown, the support element 17 in the direction of the winding core 13 can be pressed.

Because the leadership device 16 is rotatably mounted, is therefore also the support element 17 rotatably mounted. Consequently form the support element 17 and the rotatably mounted guide means 16 a rotatably mounted Arretierungsarm according to the present invention. Of course, it is also conceivable that the support element 17 without the guide device 16 exists and rotatable, in particular on the support structure 12 is arranged so that the support element 17 alone forms the locking arm. For the success of the technical teaching, it is also advantageous, but not crucial, if the guide device is present and if the guide device 16 completely encloses the elongated hollow body.

2 shows a plan view of the winding core 13 with his through the recesses 19 interrupted lateral surface 14 , The winding core 13 is about an axis 20 rotatably mounted and is usually driven to unwind by an electric motor or servomotor, not shown. It is also conceivable, however, a drive train in which the winding core 13 is not driven directly, but an additional drawstring is provided, with which the winding core is rotated or rolled.

The winding core 13 has so many recesses 19 on how elongated hollow bodies are to be wound up. Since in the embodiments, a total of four roll-up hollow body can be deployed, has the winding core shown here 13 also four recesses 19a ) to 19d ) (corresponding to corresponding to the elongated hollow bodies 15a ) to 15d ) and the support elements or Arretierungsarmen 17a ) to 17d )).

Will the winding core 13 now in the direction of rotation R ₁ turned, so are the on the winding core 13 unrolled elongated hollow body unrolled. Are all hollow bodies 15 unrolled, the respective support element engages in its respective recess 19 and thus locks the hub 13 to his final position.

For easy insertion of the support element 17 in the form of a locking arm in the respective recess 19 to be able to introduce, are the recesses 19 designed so that they are starting from the lateral surface 14 towards the interior of the hub 13 rejuvenate. Thus, each recess has a first side wall 21a ) and an opposite second side wall 21b ), which in the representation of the 1 would stand out from the viewing plane. The second side wall 21b ) lies in the unwinding direction R ₁ and has a curved surface, so that the recess 19 in the direction of the winding core or in the direction of the axis 20 rejuvenated.

Is now the respective support element 17 on the lateral surface 14 of the winding core 13 on, so it slides due to the curvature of the second side wall 21b in the corresponding recess 19 into it until it's on the opposite first sidewall 21a strikes and engages positively in the respective recess. The respective support element 17 that in the respective recess 19 is to intervene arresting, it is at least as long that it is in the respective recess 19 engages positively such that the winding core 13 not further in the direction R ₁ can turn.

Not shown in 2 However, what should be mentioned here is the fact that the individual elongated hollow body 15 in the respective recesses 19 as deep as possible, firmly on the winding core 13 are arranged, resulting in the locked end position, a reduction in the distance of attachment of the elongated hollow body 15 in relation to the axis of rotation 20 results. As a result, the bending moments induced at the mast base due to axial forces can be reduced.

In the 3a and 3b is the position of the elongated hollow body 15 and the support elements 17 immediately before and after locking in the final position. As in 3a It can be seen, are the elongated hollow body 15 all of the lateral surface 14 unrolled, so now the locking of the hub 13 can be done. To recognize in 3a is the active principle of the support elements 17 that the respective elongated hollow body 15 within the deployment mechanism 11 support. Starting from the 3a Now, the winding core rotates a bit further, due to the curved side wall 21b the respective recesses 19 the respective support element 17 in the respective recess 19 in and then, as in 3b can be seen, positively locked in this recess. Further rotation of the winding core 13 is then no longer possible. At the same time the mast base or the mast root of the elongated hollow body in the transition region continues through the support element 17 supported, so that the forces occurring here do not lead to damage of the not yet fully unfolded elongated hollow body. Because due to the not yet fully unfolded cross section can in this area, by the support element 15 is supported, the forces are not fully eroded. This fulfills the support element 17 in the locked end position two tasks, namely on the one hand, the locking of the winding core 13 and the support of the respective elongated hollow body in the transition region, ie in the mast base or root area.

Furthermore, can be from the 3a and 3b the further function of the support elements 17 derive, namely the application of constraining forces in the rolled-up state of the elongated hollow body 15 , Are these elongated hollow bodies 15 not yet unfolded and on the winding core 13 still rolled up, so presses the respective support element 17 the respective elongated hollow body on the winding core 13 , which prevents the elongated hollow body 15 Roll out in the radial direction. This will cause the elongated hollow body 15 firm and compact within the deployment mechanism 11 held.

In the 4a . 4b and 4c is again in detail the pivoting and locking the support elements 17 to recognize, in the representation of the 4 was dispensed with the figure of the elongated hollow body. Due to the curved side wall 21b become the tips of the support elements 17 forcibly guided after the complete unrolling of all elongated hollow body in the respective recess and are so inevitably pivoted into the respective recess. There, they engage positively and lock the winding core 13 at its predetermined end position.

LIST OF REFERENCE NUMBERS

10 -

device

11 -

deployment mechanism

12 -

supporting structure

13 -

winding core

14 -

lateral surface

15 -

elongated hollow body

16 -

guide means

17 -

support element

18 -

pivot bearing

19 -

recesses

20 -

Axle of the winding core

21a -

first sidewall

21b -

second side wall

Claims (11)

Device (10) for unfolding a rolled elongated hollow body (15) comprising: - at least one elongate hollow body (15), - a deployment mechanism (11) having a winding core (13) on which the at least one elongated hollow body (15) in a first state is rolled up and which by turning the at least one elongated hollow body (15) from the rolled-up first state to a rolled-up and unfolded second state, and - a locking device which locks the winding core (13) in an end position when the at least an elongated hollow body (15) is completely unrolled and transferred to its second state, characterized in that the locking device has at least one Arretierungsarm which is designed to be movable with respect to the winding core (13) and pressed by means of an elastic spring element in the direction of the winding core (13) is, wherein in the lateral surface (14) of the winding core (13) at least A recess (19) is provided, in which the at least one locking arm engages positively by the elastic spring element when the at least one elongated hollow body (15) is unwound from the winding core (13) and transferred to its second state, such that the winding core (13) is locked in a form-fitting manner by the at least one locking arm in the end position. Device (10) according to Claim 1 , characterized in that on the winding core (13) two, three, four or more elongated hollow body (15) are rolled up in a respective first state, wherein by turning the winding core (13) all elongated hollow body (15) can be transferred from the first state to the respectively unrolled and unfolded second state. Device (10) according to Claim 1 or 2 , characterized in that the locking device has two, three, four or more locking arms and in the lateral surface (14) of the winding core (13) at least as many recesses (19) are provided, each locking arm engages in a corresponding recess (19), when the at least one elongated hollow body (15) is unrolled from the winding core (13) and transferred to its second state, so that the winding core (13) is locked in a form-fitting manner by the respective locking arms in the end position. Device (10) according to one of the preceding claims, characterized in that the at least one recess (19) has a first side wall (21a) and one of the first side wall (21a) opposite the second side wall (21 b), between which engages the respective locking arm in that the at least one elongated hollow body (15) is unrolled from the winding core (13) and transferred to its second state, wherein the second side wall (21b) is curved in the direction of rotation so that the respective locking arm abuts this second curved side wall (21b) is guided along in the arresting end position by means of a rotary movement of the winding core (13). Device (10) according to Claim 4 , characterized in that the locking arm in the arresting end position on the first side wall (21a) rests positively. Device (10) according to any one of the preceding claims, characterized in that the at least one elongated hollow body (15) is fixed to a root side in the at least one recess (19). Device (10) according to Claim 6 , characterized in that the at least one elongated hollow body (15) is attached to the root side in a base region of the at least one recess (19). Device (10) according to one of the preceding claims, characterized in that the deployment mechanism (11) for each elongated hollow body (15) each having a support means having an outer elongated support shell which is spaced from the winding core (13) rotatably mounted and extending in the axial direction with respect to the elongated hollow body (15) to the winding core (13), wherein the support shell simultaneously forms the respective Arretierungsarm and in the corresponding recess (19) in the lateral surface (14) of the winding core (13) engages when the respective elongated hollow body (15) is unrolled from the winding core (13) and transferred to its second state, so that the winding core (13) is locked in a form-fitting manner by the respective supporting shell as a locking arm in the end position. Device (10) according to Claim 8 , characterized in that the elastic spring element exerts a torque on the respective support shell in the direction of the winding core (13). Device (10) according to Claim 8 or 9 , characterized in that the respective support shell, the elongated hollow body (15) at least partially completely encloses. Device (10) according to any one of the preceding claims, characterized in that the elongated hollow body (15) made of a fiber composite material comprising a fiber material and a fibrous material embedding matrix material or that the elongated hollow body (15) is made of a metal material.

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