DEVICE AND METHOD FOR HOLDING A LONGITUDINAL CHAIN ​​MACHINE

Description

[0001] The present invention relates to a device and a method for holding a longitudinal chain system.

[0002] It is known from EP 2 910 409 A1 that contact wires in the form of overhead lines for electrical power supply, which are held on longitudinal catenaries, must be positioned precisely.

[0003] FR 3 089 165 A1 discloses a method for maintaining overhead lines on railway tracks using a work train with a locomotive and maintenance car. The maintenance car is equipped with lifting devices and support systems for the overhead line. Two cranes on the train manipulate and relocate the supporting structures along the track to install new ones.

[0004] EP 3 456 601 discloses a system for handling elongated structural elements comprising a base, handling devices, and movement means. The movement means comprise a telescopic arm and mounting means pivotally attaching the arm to the base. These mounting means are slidably mounted on the base, and there are remote control means for the arm. The handling devices comprise a crane arm with gripping means, which is connected to the arm via a linkage, thus enabling rotation about vertical and horizontal axes.

[0005] The object of the invention is to improve the positioning of longitudinal chain systems.

[0006] The problem is solved by the features of the independent claims. Preferred developments are the subject of the dependent claims.

[0007] According to one aspect of the invention, a device for holding a longitudinal catenary extending in a direction of travel with a supporting cable and a contact wire held thereon in a vertical direction comprises the following features: a frame that can be placed on a rail vehicle, a boom held on the frame and alignable in a transverse direction transverse to the direction of travel and transverse to the height direction, and a support arm held on the boom in the transverse direction with a first support arm element held on the boom and a second support arm element held movable in the height direction relative to the first support arm element, wherein a support element is held on the second support arm element, onto which the longitudinal chain system can be placed counter to the height direction.

[0008] The specified device is based on the aforementioned need to position the contact wire precisely above a rail and the consideration that during overhead line maintenance, the contact wire must either be removed or adequately secured if the elements supporting the contact wire no longer provide sufficient support for the contact wire during the maintenance. This makes replacing a cross span with a cross beam, for example, very time-consuming. Typically, this work can only be completed over several days in one go.

[0009] The specified device, however, uses the rail as a reference for the position of the contact wire, positions the contact wire precisely at a predetermined location, and then holds it there throughout the entire maintenance work. The frame of the specified device can be arranged on a conventional rail vehicle so that the boom with the attached support arm can be positioned longitudinally roughly below the contact wire. The contact wire can then be positioned very precisely in the transverse and vertical directions using the boom and support arm. Exact positioning in the longitudinal direction is not important because it can be assumed that the contact wire always runs above the rail. In this way, the contact wire can be sufficiently secured in its position or location for maintenance, and maintenance can be carried out without significant loss of time.The time required to replace a cross section with a cross beam can thus be reduced from more than two days to a single night.

[0010] In a further development of the specified device, the support element has a support body extending parallel to the support arm, from which transverse direction limiting elements extend at a distance from one another in the vertical direction. Although the contact wire can be held unguided in the transverse direction, because the support element is primarily intended to absorb forces counter to the vertical direction, the fork-like design of the support body, which accompanies the transverse direction limiting elements, allows for the absorption of disruptive forces.

[0011] In an additional development of the specified device, the limiting elements are designed with different lengths in the vertical direction. This allows the support body to initially catch the contact wire during rough positioning in the transverse direction and then insert it into the recess created by the fork-like design of the support body, counter to the vertical direction.

[0012] In a particular development of the specified device, the first and / or the second support arm element is made of hollow profile bars, which allows the device to be designed to be particularly cost-effective and lightweight, but nevertheless stable.

[0013] In a further development of the specified device, the first support arm element comprises a hollow profile rod into which the second support arm element is inserted. In this way, the support arm can be extended like a telescopic rod, allowing the support body to be positioned vertically despite the fixed arrangement of the support arm on the boom.

[0014] In another refinement, the specified device comprises a tension arm mounted on the boom parallel to the support arm for pulling the second support arm element vertically. In principle, the first support arm element could be designed as a lifting device, with the second, movable support arm element being raised vertically via the lifting device. However, the forces for lifting the longitudinal catenary during pulling are distributed between both the support arm and the tension arm, allowing for more controlled and safe positioning of the contact wire.

[0015] In a preferred development of the specified device, the tension arm and the support arm elements are held together on a base, so that the position of the two arms in the direction of the boom can be firmly defined relative to one another.

[0016] In yet another refinement of the specified device, the pull arm is designed as a telescopic rod. This allows the position of the pull point for pulling the second support arm element to be determined, allowing a rough positioning of the device's effective range to be defined. Fine positioning can then be achieved by pulling the second support arm element over the pull arm.

[0017] In a particularly preferred development, the specified device comprises a cable winch for pulling a cable connected to the second support arm element and guided over the pulling arm, with which the fine positioning can be carried out in a particularly effective manner.

[0018] According to a further aspect of the invention, a method for securing a position of a longitudinal catenary system extending in a direction of travel with a supporting cable and a contact wire attached thereto in a height direction comprises the steps: Arranging a frame on a rail running below the contact wire in the vertical and transverse directions, fastening a boom transversely to the direction of travel and transversely to the vertical direction to the frame, and lifting the contact wire with a support arm held on the boom transversely to the transverse direction and transversely to the longitudinal direction into the position to be secured.

[0019] The above-described properties, features, and advantages of this invention, as well as the manner in which they are achieved, will become more clearly understood in connection with the following description of the exemplary embodiments, which are explained in more detail in conjunction with the drawings. Fig. 1 a schematic view of a device for holding a longitudinal chain system in a first functional state, Fig. 2 a schematic view of the device from Fig. 1 in a second functional state, Fig. 3 a schematic view of a rotary bearing in the device from Fig. 1 , Fig. 4 a schematic view of a support in the device from Fig. 1 , Fig. 5 a schematic view of a cantilever arm element in the device of Fig. 1 , Fig. 6 a schematic view of a support arm in the device of Fig. 1 , Fig. 7 a schematic view of a state of a method for replacing a transverse field with a cross member in a first step, Fig. 8 a schematic view of a state of the process in a second step, Fig. 9 a schematic view of a state of the process in a third step, Fig. 10 a schematic view of a state of the process in a fourth step, Fig. 11 a schematic view of a state of the process in a fifth step, Fig. 12 a schematic view of a state of the process in a sixth step, Fig. 13 a schematic view of a state of the process in a seventh step, Fig. 14 a schematic view of a state of the process in an eighth step, Fig. 15 a schematic view of a state of the process in a ninth step, Fig. 16 a schematic view of a state of the process in a tenth step, and Fig. 17 a schematic view of a state of the process in an eleventh step.

[0020] In the figures, identical technical elements are provided with identical reference symbols and are described only once. The figures are purely schematic and, above all, do not represent the actual geometric relationships.

[0021] It will be Fig. 1 Reference is made to FIG. 1, which is a schematic view of a device 2 for holding several in the Fig. 7 bis 17 shown longitudinal chain systems 4 in a first functional state.

[0022] The longitudinal chain systems 4 are each arranged above a rail 6, viewed in a vertical direction 8, which all extend along a travel direction 10. The rails 6 and the individual longitudinal chain systems 4 are spaced apart from one another in a transverse direction 12, transverse to the vertical direction 8 and transverse to the longitudinal direction 10. The device 2 can be mounted on a rail vehicle 14, which can be moved forwards or backwards on one of the rails 4 in the longitudinal direction 10.

[0023] The device 2 comprises a frame 16, which lies in a plane spanned by the longitudinal direction 10 and the transverse direction 12 and is made of a frame 18 reinforced with two support struts 20. The frame 20 can, in principle, be made of any desired material, for example, from four assembled square profiles. The frame 16 is point-symmetrical with respect to its center of gravity (not shown in detail and referenced).

[0024] On each support strut 20 there is a Fig. 3 shown pivot bearing 22 for each boom 24. The two pivot bearings 22 are arranged point-symmetrically to one another with respect to the center of gravity of the frame 16. Each pivot bearing 22 comprises a pin 26 which is fixedly attached to the frame 16 and onto which a sleeve 28 is pushed concentrically. The sleeve 28 is rotatably mounted relative to the pin 26 via a friction reducer 27, such as a grease or rolling elements, with the boom 24 being held stationary on the sleeve 28. A circular perforated disc 30 is held stationary on the pin 26, through which through openings 31 are led on the radial outer side at circumferentially equal intervals. An arm 32 with a through opening (not shown) is held stationary on the sleeve and can be placed concentrically in the height direction 8 over one of the through openings 31 through the perforated disc 30.By inserting a pin 33 through the through-hole in arm 32 and the through-hole 31 in perforated disc 30, the position of the boom 24 relative to the frame 16 can be fixed. The mechanism for fixing the relative rotational position of the boom 24 to the frame 16 using perforated disc 30, arm 32, and pin 33 is particularly cost-effective, stable, and positionally secure. In principle, however, this mechanism for securing the position can be implemented in any desired manner, should it be necessary depending on the application.

[0025] Each boom 24 is formed as an articulated arm comprising a first boom arm element 34 and a second boom arm element 36. The two boom arm elements 34, 36 are connected to each other via a pivot bearing 22, which has already been described with reference to Fig. 3 described. At each end of the first cantilever arm element 34 there is a pivot bearing 22, one for connection to the frame 16 and one for connection to the second cantilever arm element 36.

[0026] On every second boom arm element 36, on the side opposite the first boom arm element 34, a Fig. 4 The support 38 shown in the figure is basically known from conventional mobile cranes for stabilization. The support 38 in Fig. 4 is shown in the position as in Fig. 2 can be seen in the lower left corner. It has a base 39, to one end of which a storage plate 40 is attached, which can be placed on a floor. A profiled bar 41 is placed over the end of the base 39 opposite the storage plate 40 in the height direction 8, so that the support 38 can be extended and pushed together telescopically in the height direction 8. On the underside, as seen in the height direction 8, both the base 39 and the profiled bar 41 have a bore 42 running in the longitudinal direction 10 through the shell side, through which bore a locking pin (not shown) can be passed in order to secure the support 38 in a pushed-together state. On the end face of the profile bar 41, which is opposite the foot 39 as seen in the height direction 8, an end plate 43 is placed, on the upper side of which, as seen in the height direction 8, a tap wheel 44 is mounted axially and radially fixed, but rotatable in the tangential direction.The cock wheel 44 is followed by 8 running in the opposite direction to the height. Fig. 4 not visible, a threaded rod which is screwed into an upper end face of the foot 39, seen in the height direction 8. By turning the tap wheel 44, the profile bar 41 can be moved axially relative to the foot 3 and the support can thus be extended or pushed together. Viewed in the height direction 8, a nozzle 45 is fastened to the upper end of the profile bar 41 below the end plate 43. A pipe section 46 can be placed onto the nozzle 45. The pipe section 46 is held in a fixed position in a further end plate 43, which, however, can be placed in a fixed position on the end of one of the second cantilever arm elements 36, which is opposite the pivot bearing 22. A through-opening 31 is led through the pipe section 46 on the shell side. Furthermore, two through-openings 31 spaced 90° from one another are led through the nozzle 45 on the shell side.By rotating the pipe section 46, its through-hole 31 can be placed over one of the two through-holes 31 through the support and a pin 32 can be guided through the two through-holes 31. In this way, the support can be positioned either in the position shown in . Fig. 1 shown location or in the Fig. 2 shown position to the frame 16.

[0027] To position the booms 24, the first boom arm elements 34 are rotated about the pivot bearing 22 on the frame 16 until the end of the corresponding first boom arm 34 opposite the frame 16 is roughly next to a longitudinal chain system 4, which is to be held with the device 2. Subsequently, the second boom arm element 36 of the corresponding boom 24 is rotated about the pivot bearing 22 on the first boom arm element 34, which is remote from the frame 16. The rotation continues until the second boom arm element 36 is exactly below the corresponding longitudinal chain system 4, which is to be held with the device 2. Now, on a Fig. 5 rack 47 shown in Fig. 6 The support arm 48 shown is moved along the second cantilever arm element 46 and placed below the longitudinal chain system 4 to be held. The device 2 of the present embodiment has four support arms 48, so that four longitudinal chain systems 4 can be held simultaneously with the device 2.

[0028] The support arm 48 has a first support arm element 49 which is arranged stationary relative to the second boom element 36 as seen in the height direction 8, and a second support arm element 50 which is held displaceably on the first support arm element 49 as seen in the height direction 8.

[0029] The first support arm element 49 has a base 51 which surrounds the second cantilever arm element 36 downwards in the vertical direction 8. On the inner sides of the base 51 as seen in the longitudinal direction 10, eight wheels 52 are rotatably mounted on four wheel axles 53, via which the support arm 48 can be moved on the second cantilever arm element 36. Each wheel axle 53 carries two wheels. Four of the wheels 52 carry the support arm 48 on the second cantilever arm element 36, while another four of the wheels 52, as seen in the vertical direction 8, secure the support arm 48 against tipping over. The wheels 52 can be Fig. 6 be provided with flanges not further provided with reference numerals in order to enable guidance of the support arm 48 by the second cantilever arm element 36. A position of the support arm 48 on the second cantilever arm element 36 can be secured via a pin 32 which is pushed through the base 51 and the rack 47. Two parallel profile bars 41 extend from the base 51 in the vertical direction 8 on the first support arm element 49. A cable winch 54 is held on these two profile bars 41, the function of which will be discussed in more detail later.

[0030] The second support arm element 50 is telescopically inserted into the end faces of the two profile bars 41 of the first support arm element 49 facing away from the base 51. The second support arm element 49 comprises a tension arm 55, a first holding fork 56, and a second holding fork 57. The two holding forks 56, 57 are functionally identical. The first holding fork 56 has a profile bar 41 that is inserted counter to the height direction 8 into one of the profile bars 41 on the base 51. Analogously, the second holding fork 57 also has a profile bar 41 that is inserted counter to the height direction 8 into the profile bar 41 of the first holding fork 56. In this way, the two holding forks 56, 57 can be telescopically extended and pushed together in the height direction 8. In this case, through-openings 31 on the casing side are guided through the profile bar 41 of the first holding fork 56, through each of which a pin 33 can be pushed.The pin 33 blocks in the profile bar 41 of the first holding fork 56 an immersion path of the profile bar 41 of the second holding fork 57 opposite to the height direction 8 and thus holds the second holding fork 57 at a certain height as seen in the height direction 8.

[0031] From the profile bars 41 of each holding fork 56, 57 protrudes in Fig. 6 a holding part 58 extends counter to the transverse direction 12. Each holding part 58 comprises a support body 59 which extends counter to the transverse direction 12 and which, as seen in the vertical direction 8, is fastened to the upper side of each holding fork 56, 57 at a distance from the end face of the respective profile bar 41. Opposite the profile bar 41, a pin extends from the support body 59 in the vertical direction 8, so that each holding fork 56, 57 is U-shaped on the upper side as seen in the vertical direction 8. Both the pin and the part of the profile bar 41 of each holding fork 56, 57 which lies above the support body 59 in the vertical direction 8, limit the movement of an object which can be placed on the support body 59, so that these two elements act as transverse direction limiting elements 60.On the second holding fork 57, the transverse direction limiting element 60, which is formed by the profile bar 41, is longer in the height direction 8 than the opposite transverse direction limiting element 60, seen in the transverse direction 12.

[0032] Looking back at the base 51, the tension arm 55 is inserted into the other of the two profile bars 41 of the first support arm element 49, counter to the height direction 8. To adjust the height of the tension arm 55 above the base 51, several through-holes 31 are guided through the second profile bar 41, analogous to the profile bar 41 of the first retaining fork 56, into which a pin 33 can be inserted. As in the first retaining fork 56, the pin 33 in the second profile bar 41 of the first support arm element 49 limits the insertion path of the tension arm 55.

[0033] The end of the tension arm 55 not inserted into the second profile bar 41 of the first support arm element 49 is angled opposite to the transverse direction 12 and terminated with a retaining plate 61. The retaining plate 61 extends in the longitudinal direction 10 at the front and rear ends beyond the tension arm 55 and has suspension elements 62 in these areas, here in the form of through-openings. Of the suspension elements 62, in the perspective of the Fig. 6 only the front suspension element 62, viewed in the longitudinal direction 10, is visible. Similarly, a further holding plate 61 is held centrally on the profile bar 41 of the first holding fork 56, viewed in the vertical direction 8. Using these two holding plates 61 just explained, the first holding fork 56 can be pulled out of the profile bar 41 of the first support arm element 49, into which it is inserted.

[0034] For this purpose, a holding hook 63 is first hooked into the suspension element 62 on the first holding fork 56 and a hook 64, on which a deflection roller 65 is held, is hooked into the suspension element 62 on the pulling arm 55. One end of a Fig. 6 A pull rope (not visible) is connected. The other end of the pull rope is guided over the deflection pulley 65 and wound up in the cable winch 54. Now, by continuously winding up the pull rope in the cable winch 54, the holding fork 56 can be raised and positioned in the vertical direction 8. The cable winch 54 has a suitable retaining device for holding the wound pull rope and thus the first holding fork 56 in the set position in the vertical direction 8. Retaining devices for cable winches are known to the person skilled in the art, for example, from WO2013101512A1, and require no further technical explanation.

[0035] During operation of the device 2, the rail vehicle 14 carrying the device 2 is first placed in the longitudinal direction 10 at the position at which the longitudinal chain system 4 to be carried is to be held.

[0036] The booms 24, designed as articulated arms, are then extended. For this purpose, the second boom arm element 36 of each boom 24 is arranged parallel to the transverse direction 12 on the one hand, so that the support arms 48 carried on the boom can be moved in the transverse direction 12. On the other hand, the second boom arm elements 36 of the booms 24 are positioned roughly below the longitudinal chain systems 4 to be supported. The position of the first boom arm elements 34 of the booms 24 is therefore not arbitrary but is determined by the target position of the second boom arm elements 36 of the booms 24. To secure the position of the booms, the pins 33 in the individual pivot bearings 22 are inserted into the through openings 31 so that the boom arm elements 34, 36 can no longer move.

[0037] Finally, the tension arms 48 are positioned on the second extension arm elements 36 in the transverse direction 12 such that the fork-shaped ends of the holding forks 56, 57 are located in front of the respective longitudinal chain systems 4 to be supported. Now, the holding forks 56, 57 are positioned relative to each other in the vertical direction 8 such that a distance of the support bodies 59 in the vertical direction 8 corresponds to a distance of a Fig. 7 The contact wire 66 shown is to be supported by a supporting cable 67 in the longitudinal catenary 4. This relative height of the two support forks 56, 57 to each other is secured by inserting the pin 33 into one of the through openings 31 in the profile bar 41 of the first support fork 56.

[0038] Now the support bodies 59 of the two holding forks 56, 57 are pushed to the same position as the longitudinal catenary to be supported in the transverse direction 12, so that the support body 59 on the first holding fork 56 is located below the contact wire 66 in the vertical direction 8 and the support body 59 on the second holding fork 57 is located between the contact wire 66 and the supporting cable 67 in the vertical direction 8.

[0039] Finally, the Fig. 6 The traction cable (not visible) is tightened by turning the cable winch 54 and the two holding forks 56, 57 are pulled upwards in the height direction 8 in order to lift the longitudinal chain system 4.

[0040] Device 2 is an example of a tool that allows a cross-chain system on a rail vehicle line to be easily replaced by a crossbeam.

[0041] Such an exchange procedure is described below using the Fig. 7 bis 17 described.

[0042] The method described below is intended to replace a cross-chain system 68 comprising a cross-supporting cable 69, an upper guide cable 70, a lower guide cable 71, cross-supporting cable hangers 73 and insulators 74 against a Fig. 16 and 17 The crossbeam 72 shown can be replaced. Cross-chain systems are known to the person skilled in the art, for example, from EP 2 805 846 A1, which is why a more detailed explanation of the technology will be omitted for the sake of brevity.

[0043] The cross-chain system 68 carries a suspension cable 67 above each rail 6, to which a contact wire 66 is attached below, as seen in the vertical direction 8, for supplying electrical power to a rail vehicle traveling on the respective rail 6. A contact wire side holder 75 ensures the necessary transverse position variation of the contact wire 66, as known per se, to minimize local abrasion of the rail vehicle's pantograph.

[0044] In the procedure described below for exchanging the cross chain system 68 for the cross beam 72, the device 2 can be removed from the Fig. 1 bis 6 However, the device can also be designed differently. However, some mandatory features of the device 2 must be present in order to be able to carry out the method. These features of the device 2 are given corresponding reference numerals from the Figs. 1 bis 6 in the Figs. 7 bis 17 taken over.

[0045] First, the rail vehicle 14, which is to hold the longitudinal chain system 4 for replacing the transverse chain system 68, is placed in the longitudinal direction 10 at the location of the transverse chain system 68. This stage of the process is shown in Fig. 7 shown. In principle, an exact positioning of the rail vehicle in the longitudinal direction 10 is not absolutely necessary. However, to maintain the statics, the rail vehicle 14 should be positioned as precisely as possible in the longitudinal direction 10 at the location where the cross-chain system to be replaced is located.

[0046] Subsequently, the outriggers 24 are extended in and against the transverse direction 12, with the supports 38 being held at their ends opposite the rail vehicle 14. Rail elements 36' are held on the supports 38, which functionally perform the same function as the second outrigger arm elements 36—namely, to keep the support arms 48 guided in the transverse direction 12.

[0047] First, those support arms 48 are positioned in the transverse direction 12 which are intended to hold the longitudinal catenary systems 4 which are located closer to the rail vehicle 14 when viewed in the transverse direction 12. This is shown in the Figs. 8 bis 10 For this purpose, the support arms 48 are moved on the rail elements 36' in the transverse direction 12 until the Figs. 8 bis 10 The base, which is not further referenced, is located next to the longitudinal chain system 4 to be supported in the transverse direction 12. The support arms 48 are then positioned parallel to the vertical direction 8, so that the state according to Fig. 10 In this state, the forked ends of the support arms 48, viewed from their bases in the transverse direction 12, are located in front of the longitudinal chain systems 4 which they are intended to support.

[0048] The forked ends can be attached to any point of the longitudinal catenary 4, i.e. to the contact wire 66, to the supporting cable 67 or to both points, as with the device 2 of the Fig. 1 bis 6 In the Figs. 7 bis 17 In the process shown, the longitudinal catenaries 4 are carried exclusively on the supporting cable 67, which is why the fork-shaped ends of the support arms 48 are positioned between the respective contact wire 66 and the supporting cable 67, as seen in the height direction 8.

[0049] In the next step, the boom 24 is extended, the support arms 48 of which are intended to hold the longitudinal chain systems 4, which are further apart in the transverse direction 24 than those previously explained. This process is described in the Fig. 11 bis 13 shown. On the now extended boom 24, the rail element 36' and the support arms 48 are positioned in the same way as already shown in the Fig. 8 bis 10 described. Therefore, further explanation is omitted.

[0050] Subsequently, a fine adjustment of the position of the forked ends of the support arms 48 in and against the transverse direction 12 is carried out. This can be done by further extending the boom 24 and / or by moving the support arms 48 on the booms 24. Both variants can be determined directly from a comparison of the Figs. 12 and 13 recognize each other.

[0051] After the forked ends of the support arms 48 are positioned exactly in the transverse direction 12 at the location of the longitudinal chain systems 4 to be supported, the actual lifting process of the longitudinal chain systems 4 to be supported takes place, which Fig. 14 is shown.

[0052] First, the support 38 is extended opposite to the vertical direction 8 and placed on the ground. This support belongs to the boom 24, which is further extended in the transverse direction 12. This secures the rail vehicle 14 against tipping over and stabilizes the entire structure during the carrying process. Extending the support of the boom 24 on the other side, as seen in the transverse direction 12, is generally not necessary.

[0053] Now the forked ends of the support arms 48 can be lifted in the height direction 8 using a suitable lifting mechanism. A possible lifting mechanism is shown in the Fig. 6 However, the forked ends of the support arms 48 can be raised electrically, hydraulically, manually, pneumatically, or the like. The mechanism of Fig. 6 This is not intended to limit the described procedure. It simply has the advantage of being independent of any external power supply because it can be operated entirely manually.

[0054] After the longitudinal chain systems 4 are held here on the support cables 4, the entire cross chain system 68 can now be dismantled. This state is in Fig. 15 clarified.

[0055] The crossbar 72 can then be moved as shown in Fig. 16 shown and re-hang the longitudinal chain systems on suitable T-beams 76. This final state is shown in Fig. 17 shown.

Claims

1. Device (2) for holding a longitudinal chain system (4) extending in a travel direction (10) with a support cable (67) and a contact wire (66) held thereon in a height direction (8), comprising: - a frame (16) that can be placed on a rail vehicle (14), characterized by - a boom (24) that is held on the frame (16) and is adjustable transversely to the travel direction (10) in a transverse direction (12) and transversely to the height direction (8), and - a support arm (48) held in the transverse direction (12) on the boom (24), with a first support arm element (49) held on the boom (24) and a second support arm element (50) movably held opposite the first support arm element (49) in the height direction (8), wherein a support element (58) is held on the second support arm element (50), on which the longitudinal chain system (4) can be placed against the height direction (8).

2. Device (2) according to claim 1, wherein the support element (58) has a support body (59) extending parallel to the boom (24), from which transverse direction boundary elements (60) extend spaced apart in the height direction (8).

3. Device (2) according to claim 2, wherein the transverse direction boundary elements (60) are of different lengths in the height direction (8).

4. Device (2) according to one of the preceding claims, wherein the first and / or second support arm element (49, 50) is made of hollow profile rods (41).

5. Device (2) according to one of the preceding claims, wherein the first support arm element (49) comprises a hollow profile rod (41), into which the second support arm element (50) is inserted.

6. Device (2) according to one of the preceding claims, comprising a pulling arm (55) held on the boom (24) parallel to the first and second support arm elements (49, 50) for pulling the second support arm element (50) in the height direction (8).

7. Device (2) according to claim 6, wherein the pulling arm (55) is held together with the support arm elements (49, 50) on a base (51).

8. Device (2) according to claim 6 or 7, wherein the pulling arm (55) is designed as a telescopic rod.

9. Device (2) according to one of claims 6 to 8, comprising a cable winch (54) for pulling a cable guided over the pulling arm (55) and connected to one of the support arm elements (49, 50).

10. Method (2) for securing a position of a longitudinal chain system (4) extending in a travel direction with a support cable (67) and a contact wire (66) held thereon in a height direction (8), characterized by: - Arranging a frame (16) on a rail (6) running below the contact wire (66) as seen in the height direction (8) and the transverse direction (12), - Attaching a boom (24) transversely to the travel direction (10) and transversely to the height direction (8) to the frame (16), and - Raising the contact wire (66) with a support arm (48) held transversely to the transverse direction (12) and longitudinal direction (10) on the boom (24) to the position to be secured.