WO2012000005A1

WO2012000005A1 - Method and device for raising and lowering and for swiveling an object

Info

Publication number: WO2012000005A1
Application number: PCT/AT2011/000276
Authority: WO
Inventors: Markus Schoisswohl; Anton Maly
Original assignee: Waagner-Biro Austria Stage Systems Ag
Priority date: 2010-06-29
Filing date: 2011-06-22
Publication date: 2012-01-05
Also published as: AT510183A1

Abstract

For a method and device for raising and lower and for swiveling an object (21) having at least one preferred direction of extent, for example a rod, a plate, in particular an acoustic panel, the device comprising at least one support element (22) for raising and lowering the object (21) and at least one further support element (26) for swiveling the object, the at least one support element (22) for raising and lowering the object and the at least one support element (26) for swiveling the object (21) are or can be coupled to a common drive (24), wherein the support elements (22, 26) can be wound on a common rope drum (23) and can be unwound from said common rope drum, the rope drum (23) is coupled to the common drive (24), and at least one sub-section (23', 23'') of the rope drum for acting on the support element for swiveling can be decoupled from a sub-section that interacts with the support element for raising and lowering so that a reduced number of drives (24) and a simplified controller can be sufficient for raising and lowering and for swiveling an object (21).

Description

Method and device for lifting and lowering and pivoting a

article

The present invention relates to a method for lifting and lowering as well as pivoting of an at least one preferred extension direction having article, such as a rod, a plate, in particular an acoustic panel, the object via at least one support means, such as a cable, a strip tension or a chain is raised and lowered and is pivoted over at least one further support means, such as a cable, a belt tension or a chain. The present invention further relates to a device for raising and lowering and pivoting of an at least one preferred extension direction having article, such as a rod, a plate, in particular an acoustic panel, with at least one support means, such as a cable, a belt tension or a chain to Lifting and lowering the object and at least one further support means, such as a cable, a tape tension or a chain for pivoting the same.

There are different methods and devices for lifting and lowering and pivoting of objects known, in general, for example, cables, bands, chains or the like. As a support means are used. For a simultaneous lifting and lowering and pivoting of possibly large dimensions having article usually separate drive means are used for such suspension means, which is disadvantageous that a complex and complex tuning and control of the movement of the individual drive means for taking a desired position to transporting or to be lifted as well as to be lowered and / or at the same time pivoting object are required. For example, in connection with a movement of stage devices, which may not only have large dimensions but also correspondingly large weight, is usually a plurality of support means, such as cables for lifting and lowering use of such a large object use, which in particular has at least one preferred direction of extent such as a rod, a plate or a panel, it is immediately apparent that when using a plurality of drive means for a corresponding plurality of support means for both lifting and lowering as well as for pivoting a speaking high and complex control effort for such drive devices is required. Here usually the lifting means used for lifting and lowering and thus for receiving a possibly large weight must be dimensioned correspondingly large, while for example, for a pivoting of such an article with small or weaker dimensioned drive means Auslangen can be found.

Cable winches or double winches have been proposed, for example, in accordance with DE 43 02 018 A1 or DE 42 00 176 A1 or DE 30 28 656 A1 for a coupling of cable drives, wherein, for example, a slip clutch or brake device or ratchet is provided between individual drum elements, but in particular an exact positioning of the individual drum elements, which are assigned to different cable drives, can not be guaranteed.

The present invention aims to avoid in particular the disadvantages of the above-mentioned prior art with regard to a complex control of independent drives or drive means and to further develop a method and a device of the type mentioned above, in particular with a smaller one Number of drives or drive devices and associated with a less complex control Auslangen can be found and beyond a simple and reliable position detection of the different lifting or supporting means is possible. To solve these objects, a method of the type mentioned above is essentially characterized in that the at least one lifting and lowering support means and the at least one support means for pivoting the object are driven by a common drive and that the at least one lifting and lowering support means and the at least one support means for pivoting is wound onto and unwound from a cable drum coupled to the common drive, portions of the cable drum decoupling the movement of the at least one support means for pivoting from a portion for the at least one lifting and lowering support means become. Characterized in that according to the invention a common drive for both the at least one support means for raising and lowering and the at least one support means for

Pivoting the item is provided, the effort for the Provision of the drives or drive devices over the known prior art, wherein in each case a plurality of drives for the different suspension means or cables, bands or chains had to be made to use, be reduced accordingly. In addition, by providing a common drive for both the at least one support means for lifting and lowering and the at least one support means for pivoting the effort for controlling or tuning the different suspension means for proper movement and positioning of the possibly large dimensions and weighted article be reduced or simplified accordingly. It can thus be a total of the effort both in the manufacture of the drive means and in controlling a movement or positioning of such an article to reduce, for example, especially when used in a stage due to the usually limited space, the reduction in the number of drive devices additional benefits results. For a decoupling of the movements of the at least one support means for raising and lowering the article as well as the at least one further support means for pivoting the article is also proposed according to the invention that the at least one support means for lifting and lowering and the at least one support means for pivoting on a coiled with the common drive cable drum and unwound from this, wherein portions of the cable drum for decoupling the movement of the at least one support means for pivoting from a portion for the at least one support means for lifting and lowering are decoupled. It is thus possible to achieve a simple and reliable decoupling of the movements by means of a cable drum, which has parts that can be decoupled from one another for different suspension elements, wherein the cable drum is coupled to the common drive in a manner known per se, in particular for a lifting or lifting device Absenkbewegung a decoupled additional pivoting movement of the object to be transported is possible. In addition, portions of a cable drum which can be decoupled from one another can be brought into the desired coupled or decoupled position with a simple control, so that the expenditure for a proper movement of the object is further reduced. By means of the mutually couplable and uncoupled subregions, a reliable switching of the individual subregions of the drum and a secured engagement of the same can be achieved. Furthermore, a position detection of the suspension means or ropes with a single means for detecting the position by the coupling of the sections the rope drum achievable, so that with simplified effort and in particular a reduced number of detection or measuring devices, the positioning accuracy of the individual suspension means or ropes or the like. Can be improved. For a simple and reliable pivoting of a possibly large dimensions having article is proposed according to a further preferred embodiment that are used to pivot the article two opposite the at least one support means for raising and lowering at different portions of the article attacking suspension means whose relative position over a Adjustment of the effective length of the support means is changed for pivoting. By changing the effective length of the support means for pivoting, a corresponding inclined or tilted position of an object to be moved or positioned can be achieved substantially simultaneously with the lifting or lowering movement of the at least one further support means.

For a substantially uniform loading of the drive device and / or the cable drum when lifting and lowering an optionally having a large weight and large objects having article is proposed according to a further preferred embodiment, that a plurality of substantially in one or the extension direction or is coupled to the common drive in substantially central axis or axis of gravity of the article attacking suspension means for lifting and lowering. To solve the above-mentioned objects, a device of the type mentioned above is substantially characterized in that the at least one support means for raising and lowering and the at least one support means for pivoting the object with a common drive are coupled or coupled and that at least one support means for raising and lowering and the at least one support means for pivoting the object on a common cable drum wound and unwound from this, that the cable drum can be coupled or coupled to the common drive and that at least a portion of the cable drum for a loading of the at least one support means for pivoting of a cooperating with the at least one support means for raising and lowering portion of the cable drum can be decoupled. As already mentioned above, it is thus possible to reduce the number of drive facilities not only achieve cost savings in the construction of the device according to the invention, but it also reduces the control effort for the different support means to be used is reduced or minimized, moreover, the positioning accuracy can be improved with a simplified effort. For a decoupling of the movement of the at least one support means for lifting and lowering of the movement of the at least one support means for pivoting the object to be transported according to the invention also proposed that the at least one support means for lifting and lowering and the at least one support means for pivoting the object be wound on a common cable drum and can be unwound from this, that the cable drum is coupled or coupled to the common drive and that at least a portion of the cable drum for applying the at least one support means for pivoting one with the at least one support means for lifting and lowering cooperating portion of the cable drum is decoupled bar. It can be, as also mentioned above, thus find with a different and mutually decoupled sections comprising cable drum Auslangen, which is coupled to the common drive or the common drive means, wherein a decoupling of the movement of the different suspension means by a decoupling of the individual Parts of the cable drum in a simple and reliable way is possible.

For a particularly reliable and simple pivoting of an optionally large-sized object article is proposed according to a further preferred embodiment, that at least two support means for pivoting the article to the at least one support means for raising and lowering different parts of the article attack and that the effective length of the support means for pivoting by an adjustable over a decoupled portion of the common cable drum adjusting device is adjustable. Such an additional and adjustable adjusting device for the effective length of the support means can be provided in a simple and reliable manner, so that the decoupling of the movements of the at least one lifting and lowering support means and the suspension means for pivoting in a simple manner possible. Alternatively, at least one support means for pivoting can be coupled directly to a decoupled portion of the cable drum, in which case this support means for pivoting engages only on one side of the object relative to the at least one support means for lifting, in order to achieve such a desired pivoting movement. According to a further alternative embodiment further decoupled portions of a cable drum may be provided to optionally provide on both sides of the at least one support means for lifting and lowering attacking support means for pivoting with different effective length available.

For a particularly reliable absorption of the load by a possibly having a large weight article, it is proposed that a plurality of support means for lifting and lowering acts substantially along one or the substantially central axis of extension or axis of gravity of the object and wound on the cable drum and of this is unwound, as corresponds to a further preferred embodiment of the device according to the invention.

For a reliable coupling of different portions of the cable drum is proposed according to a further preferred embodiment that mutually coupled portions of the cable drum against a force of a spring in a decoupled position can be brought.

For a simple movement and coupling and decoupling of the mutually coupled portions of the cable drum is also proposed that the decoupled portion of the cable drum by a pulling device, in particular an electromechanical moving device, such as a spindle, a magnet or the like., Can be brought into the decoupled position is, as corresponds to a further preferred embodiment of the device according to the invention.

For a backup of the mutual rotational position or position of the different portions of the cable drum is proposed according to a further preferred embodiment that the decoupled portion of the cable drum is secured in the decoupled position against rotation or securable.

The invention will be discussed in more detail with reference to embodiments shown schematically in the accompanying drawings. In this show: Figure 1 is a schematic representation of a first embodiment of a device according to the invention for lifting and lowering and pivoting of an object for performing the method according to the invention.

Fig. 2 shows a schematic partial section through the decoupled portion and Fig. 2b is a detail view in the direction of arrow II of Fig. 2a with omission of cover elements shows;

Fig. 3 in a similar to Figure 1 representation of a modified embodiment of a device according to the invention for carrying out the method according to the invention;

4 shows, on an enlarged scale, a partial section through the cable drum according to FIG. 3, wherein in particular the components required for decoupling of the right-hand subarea in the illustration are shown;

Fig. 5 in a similar to Fig. 4 representation of a modified embodiment of a decoupled or decoupled portion of the cable drum, wherein only one half of the cable drum in comparison with the illustration of FIG. 4 is shown and in the upper half of FIG an embodiment with a large drive wheel and in the lower half of Figure 5b an embodiment is shown with a small drive wheel. and

Fig. 6 in a turn similar to Fig. 5a representation a partial section through a further modified embodiment of a cable drum with decoupled ble subregions. In Fig. 1, 1 a substantially plate-shaped object, for example, an acoustic panel of a stage not shown, wherein a plurality of cables 2 is provided for lifting and lowering of the plate-like object 1, wherein in the direction of extension of the article 1 in the Drawing plane and substantially along the longitudinal axis or axis of gravity of the article 1 a plurality of cables 2 attacks, which can be wound on a common cable drum 3 and unwound from this. The individual cables are indicated schematically in FIG. 1 by 2 ¹ , 2 ² and 2 ³ , it being immediately understood that the number of lifting and lowering cables, which are generally designated 2 below, corresponds to the dimensions and weight of the cable to be transported object 1 is selected. While in the following description support means for raising and lowering and pivoting of the article 1 of cables 2 are formed, instead of such cables 2 in modified embodiments, bands, chains or the like. Be used, each similar to a cable on a cable drum 3rd be wound up.

In addition to the plurality of cables 2 for lifting and lowering the plate-like object 1 attack on mutually different portions of the plate-shaped object 1 additional cables 4 and 5, which upon adjustment of a different effective length pivoting of the plate-shaped object 1 corresponding to the schematically indicated double arrow 6 allow. The cables 4 and 5 are also aufwickelbar on the common cable drum 3 or unwound from this. For a setting of a different length of the cables 4, 5 for pivoting is a separate and additional adjustment device 7 use, their positioning or position relative to the cables 4 and 5 and thus to adjust the effective length thereof over a decoupled portion 8 of the cable drum and a wind-up cable 9 can be adjusted in the direction of the double arrow 10. By a movement of the adjusting device 7 in the direction of the double arrow 10 results directly in a winding or unwinding both the cables 2 for lifting and lowering the object to be transported 1 and the cables 4 and 5 for pivoting by changing the position of the adjustment 7 shows a corresponding pivoting movement of the article 1 to be transported in accordance with the double arrow 6.

The cable drum 3 is driven by a drive designated schematically by 11, wherein such a drive for a cable drum is known per se and will not be discussed in detail here.

In Fig. 1, articulation points or fixing points for both the cable drum and the drive device or the drive and a plurality of only schematically listed pulleys are also not shown in detail for the sake of simplicity. Such pulleys are stored here in corresponding scaffolding or support means, which is also known per se. From the illustration of FIG. 1 it can be seen that by providing a common drive 11 which is coupled to the cable drum 3, on which not only the cables 2 for raising and lowering the object 1 but also cables 4 and 5 for pivoting the same as Also via a decoupled portion 8, a cable 9 for an adjustment 7 can be wound and unwound, not only with a reduced number of drive means for lifting and lowering and a pivoting of an object 1 Auslangen can be found, but also a correspondingly simplified control can be used.

An embodiment for decoupling the portion 8 of the cable drum 3 is shown schematically and partly in Fig. 2, wherein only the essential elements are discussed in detail. It is the decoupled portion 8, on which the cable 9 not shown in detail in Fig. 2a for an adjustment of the adjusting device is wound, mounted on an axle extension 12 of the cable drum 3 via schematically indicated bearings 13. For a coupling or decoupling of the portion 8, a fixed gear 14 is also provided, which provides via a schematically designated 15 tooth clutch and a torque clutch 16 entrainment of the portion 8.

For a desired coupling or decoupling of the partial region 8 during a movement of the cable drum 3, a spring-loaded E-tie bolt 17 is used in the embodiment shown in FIG. 2, as indicated in FIG. 2b. In addition, end stops 18 are indicated with end circuit in Fig. 2b.

The adjustment of the position of the adjusting device 7, as shown in Fig. 1, for adjusting the effective length of the cables 4 and 5 for pivoting the plate-like article 1 can thus be achieved in a simple and reliable manner, in particular it is apparent that for the cables 4 and 5 for pivoting no additional drive is required.

Due to the coupling and decoupling of the individual subregions, the positioning accuracy of the cables 4 and 5 at a reduced cost and with only one device for position detection due to the defined relative position of Achieve partial areas to each other, and this also applies to the embodiments shown in the following figures. A simple detection of the position of the cables 4 and 5 can be carried out for example by a known sensor for detecting the rotational position of one of the mutually coupled portions.

In a modified embodiment according to FIG. 3, a substantially plate-like object 21 is raised and lowered via a plurality of cable pulls 22 for lifting and lowering, whereby the plurality of cable pulls 22 can be wound on a common cable drum 23 on a partial area 23 ' or from this is unwound. Similar to the embodiment according to FIG. 1, only three cables 22 ¹ , 22 ² and 22 ³ are again used, for example, which are generally or jointly designated 22. The cable drum 23 is driven by a known drive device or a common drive 24.

For a pivoting of the plate-like object 21 according to the schematic double arrow 25 is a correspondingly large longitudinal extent of the plate-like object 21, a plurality of cables 26 use, which can be wound on a decoupled portion of the cable drum 23 and unwound from this, wherein the decoupled portion of the cable drum with 23 "in Fig. 3. In the illustrated embodiment, for example, two cables 26 ¹ and 26 ^{2 are used} for pivoting use.

In the coupled position of the cable drum 23 shown in FIG. 3, a substantially horizontal lowering and lifting of the plate-like object 21 takes place. For a pivoting of the article 21, the decoupled portion 23 "is brought into a decoupled position, as will be shown in detail below, so that by changing the position or position of the points of application of the cables 22 relative to 26 on the plate-like object 21st a pivoting corresponding to the double arrow 25 is made.

Instead of a plate-like object 21 or 1, as shown in FIGS. 1 and 3, with appropriate articulation of the at least one cable pull for lifting and lowering 2 or 22 as well as the cables 4, 5 and relative to 26 for encryption pivot a rod-like object raised and lowered and pivoted.

In particular, FIGS. 4 to 6 show in detail and partially in section the decoupleable partial region designated in each case with 23 ", while the partial region 23 'on which the plurality of cable pulls 22 can be wound for raising and lowering the plate-like object 21 is merely In the decoupled position of the subregion 23 "shown in FIG. 4, a traction device schematically indicated by 28 can be seen, by which, contrary to the force of a spring 29, the subregion 23" is moved into the decoupled position according to the arrow 30 In this way, intermeshing toothed wheels 31 and 32 are disengaged, so that upon further movement of the cable drum 23 and in particular of the subregion 23 'there is no movement of the subregion 23 "coupled to the cable sheaves 26 for pivoting and pivoting of the object 21 is achievable is. An anti-rotation in the decoupled position is achieved here by an engagement of gears 33 and 34. In the modified embodiment according to FIG. 5, partial sections are shown in each case, with a large drive wheel 35 being used in the upper half according to FIG. 5a in order to bring about such reduced lateral forces. A driving takes place via a further gear 36 in a coupled position. The adjustment of the portion 23 "is again against the force of a spring 37 via a in the upper half of FIG. 5a not shown pulling device, wherein a rotation is in turn indicated by gears 33 and 34.

In the lower half of the illustration according to FIG. 5b, instead of the large-diameter gear 35 in the illustration according to FIG. 5a, a small-diameter gear 38 is used, which cooperates with a toothed wheel 39. For an adjustment, a magnetic traction device 40 is indicated in order to achieve the decoupled position illustrated in FIG. 5b. In addition, an end stop or a limiting device 41 is indicated. In a further modified embodiment according to FIG. 6, similar to the representation according to FIG. 5a, only an upper half of decoupled partial regions is shown 23 'and 23 "shown, wherein the decoupled portion 23" beyond not fully shown.

Notwithstanding the embodiment according to FIGS. 4 and 5, wherein for a decoupling of the subregions 23 'and 23 "a relative displacement between these subregions 23 ^* and 23" is undertaken, the coupling between the subregions 23 takes place in the embodiment shown in FIG 'and 23 "by a mounted in the interior of the region 23" of the cable drum 23 coupling shaft 42 which penetrates inside the portion 23' arranged bearing elements 43. In a displacement of the coupling element or the coupling shaft corresponding to the double arrow 44 by a schematically indicated adjusting device 45 is an engagement with a bearing element 46 in decoupled portion 23 'or a cancellation of engagement with this bearing element 46. According to the respective position of the coupling element 42, which for a uniform distribution of forces at several points over the inner circumference of the portion 23 'may be provided in accordance with multiple embodiments, entrainment of the portion 23 "takes place during a movement of the portion 23' of the cable drum 23 or not. 6 embodiment is in particular the fact that regardless of a coupled or decoupled state of the subregions 23 'and 23 "the relative position of the individual cables or generally suspension means, of which in Fig. 6 only one (one) with 22 or 26 is designated, u remains unchanged, while in the embodiments shown in FIGS. 4 and 5 by a translational movement or relative displacement between the subregions 23 'and 23 "also a corresponding relative change in the position of the individual cables 22 ¹ , 22 ² and 22 ³ relative to the Cables 26 ¹ and 26 ² occurs.

It can thus be seen that the cable drum driven by a common drive 24 not only raises and lowers an article 21 to be transported by means of cables 22 but also simultaneously by a simple coupling of sub-regions 23 'and 23 "which can be coupled together or decoupled from one another Adjustment by adjusting the effective length of the cables 26 can be achieved.

In this way, it is not only possible to reduce the effort by minimizing the number of drives or drive devices to a single drive 11 or 24, but it can also be the cost of the control due to the simple possibilities a decoupling of portions of a cable drum 3 or 23 or a coupling with additional adjusting devices 7, as indicated in FIGS. 1 and 2, are reduced or minimized.

Claims

claims

1. A method for lifting and lowering and pivoting of an at least one preferred extension direction having article (1, 21), for example a rod, a plate, in particular an acoustic panel, wherein the article (1, 21) via at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22, 22 ² , 22 ³ ), for example, a cable pull, a belt tension or a chain is raised and lowered and at least one further support means (4, 5, 26, 26 ¹ , 26 ² ) , For example, a cable, a belt tension or a chain is pivoted, characterized in that the at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering and the at least one support means (4, 5, 26, 26 ¹ , 26 ² ) for pivoting the object (1, 21) via a common drive (1 1, 24) are driven and that the at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering and the at least one support means (4, 5, 26, 26 ¹ , 26 ² ) for pivoting on a with the common drive (1 1, 24) coupled cable drum (3, 23) are wound and unwound from this, wherein portions (8, 23 ' , 23 ") of the cable drum for decoupling the movement of the at least one support means for pivoting from a portion for the at least one lifting and lowering support means are decoupled.

2. The method according to claim 1, characterized in that for pivoting the article (1) two opposite the at least one support means (2) for lifting and lowering at different portions of the article (1) acting support means (4, 5) are used, the relative position via an adjustment of the effective length of the support means (4, 5) is changed for pivoting.

3. The method according to claim 1 or 2, characterized in that a plurality of substantially in one or the extension direction or substantially central axis or axis of gravity of the object (1, 21) acting support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering with the common drive (11, 24) is coupled.

4. An apparatus for raising and lowering and pivoting of an at least one preferred extension direction having article (1, 21), for example a rod, a plate, in particular an acoustic panel, with at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22 , 22 ¹ , 22 ² , 22 ³ ), for example a cable, a belt train or a chain for raising and lowering the object and at least one further support means (4, 5, 26, 26 ¹ , 26 ² ), for example a cable, a belt tension or a chain for pivoting the same, characterized in that the at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering and the at least one support means (4, 5, 26, 26 ¹ , 26 ² ) for pivoting the object ( 1, 21) with a common drive (1 1, 24) are coupled or coupled and that the at least one support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering and the at least one support means (4, 5, 26, 26 ¹ , 26 ² ) for pivoting the article (1, 21) on a common cable drum (3, 23) wound up and unwound from this that the cable drum (3, 23) with the common drive (11, 24) coupled or coupled and that at least a portion (8, 23 ", 23") of the cable drum for a Beaufschlagun g of the at least one support means for pivoting of a cooperating with the at least one support means for lifting and lowering portion of the cable drum can be decoupled.

5. The device according to claim 4, characterized in that at least two support means (4, 5) for pivoting the article (1) against the at least one support means (2) for raising and lowering different portions of the article (1) attack and that the effective length of the suspension means (4, 5) is adjustable for pivoting by means of an adjusting device (7) which can be adjusted via a decoupable part region (8) of the common cable drum.

6. Apparatus according to claim 4 or 5, characterized in that a plurality of support means (2, 2 ¹ , 2 ² , 2 ³ , 22, 22 ¹ , 22 ² , 22 ³ ) for lifting and lowering substantially borrow along a or the substantially central axis of extension or axis of gravity of the object (1, 21) engages and on the cable drum (3, 23) wound and unwound from this.

7. Device according to one of claims 4 to 6, characterized in that mutually couplable portions (23 ', 23 ") of the cable drum (23) against a

Force of a spring (29, 37, 43) can be brought into a decoupled position.

8. Device according to one of claims 4 to 7, characterized in that the decoupled portion (23 ") of the cable drum (23) by a pulling device (28, 40, 43), in particular an electromechanical movement device, such as a spindle, a magnet or the like., Can be brought into the decoupled position.

9. Device according to one of claims 4 to 8, characterized in that the decoupled portion (23 ") of the cable drum (23) is secured in the decoupled position against rotation or securable.