EP0464062A1

EP0464062A1 - Device for inspecting the underside of bridges.

Info

Publication number: EP0464062A1
Application number: EP90904744A
Authority: EP
Inventors: Alfons Moog
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-03-25
Filing date: 1990-03-23
Publication date: 1992-01-08
Anticipated expiration: 2010-03-23
Also published as: US5318149A; JP3022988B2; WO1990011407A1; EP0464062B1; DE8903771U1; JPH04504289A; AU5282690A; DE59000988D1

Abstract

Un dispositif d'inspection du côté inférieur de ponts comprend un chariot de transport (1) relié à un support intermédiaire (11), un organe de guidage (9) monté sur le support intermédiaire de manière rotative autour d'un axe horizontal de rotation (12) et une tour de levage (4) à quatre longerons angulaires reçue sur l'organe de guidage et mobile perpendiculairement à l'axe de rotation de celui-ci. L'organe de guidage (9) est plat et enclenche par glissement uniquement les deux longerons angulaires qui lui sont adjacents. Ces deux longerons angulaires sont capables de supporter une charge plus élevée que les deux autres. Le support intermédiaire (11) est monté sur le chariot de transport (1), de préférence au moyen d'un parallélogramme à leviers pivotable autour d'axes verticaux et composé d'au moins deux leviers (13, 14).A device for inspecting the lower side of bridges comprises a transport carriage (1) connected to an intermediate support (11), a guide member (9) mounted on the intermediate support in a rotatable manner about a horizontal axis of rotation (12) and a lifting tower (4) with four angular longitudinal members received on the guide member and movable perpendicular to the axis of rotation thereof. The guide member (9) is flat and engages by sliding only the two angular longitudinal members which are adjacent to it. These two angular spars are able to withstand a higher load than the other two. The intermediate support (11) is mounted on the transport carriage (1), preferably by means of a parallelogram with levers pivotable about vertical axes and composed of at least two levers (13, 14).

Description

"Bridge underside device"

Description:

The invention relates to a bridge underside device with a chassis, an intermediate support attached to the chassis, a guide member rotatably mounted on the intermediate support about a horizontal axis of rotation, a lifting tower accommodated by the guide member and displaceable perpendicular to its axis of rotation with four corner spars, one on the lifting tower around its longitudinal central axis rotatably mounted lower part of the lift tower and a work platform attached to it.

In known bridge underside devices of this type, the lifting tower has a symmetrical, in particular square, cross-section and the guide element encloses it all around. Such a guide element with a hollow cross section, which takes up the tower cross section, is also referred to as a guide box. Disadvantages are the high space requirement, which makes it difficult to close the device tightly during transport, and the unfavorable weight distribution due to the symmetrical lifting tower cross section. The invention has for its object to propose a compact and versatile self-assembling underside bridge device with increased stability.

Starting from a device of the type described in the introduction, this object is achieved according to the invention in that the guide member has a flat shape and is in sliding engagement only with the two corner bars of the lifting tower adjacent to it, and in that these corner bars are designed for a higher load capacity than the other two Corner pillars. Racks can also be attached to the loaded corner spars, which work together with a rack and pinion drive on the guide element to drive the lifting tower. With this proposal, the weights of the lifting tower and the guiding member are concentrated to a much greater extent on the bridge side, especially if the corner posts and the struts remote from the bridge are made of light metal.

The guide member is preferably mounted on the intermediate carrier by means of a turntable, which is preferably also flat and plate-shaped. In order to extend the lifting tower to close to its free end, the guide member preferably has a shorter section with respect to its axis of rotation to the free end of the lifting tower and a longer section facing the work platform.

In order not to endanger traffic when the device is set up on a road bridge, it is proposed that the intermediate carrier be mounted on the chassis by means of a lever parallelogram that can be pivoted about vertical axes from at least two levers. As a result, the unit, which is folded up during transport and consists of the lifting tower and work platform, can be lifted parallel to itself beyond the edge of the bridge and then swiveled around the horizontal Set up the axis of rotation. The parallel levers are preferably telescopic. A third, preferably slightly higher, parallel lever can also be provided. If these three parallel levers can be individually telescoped and detached from the intermediate carrier, columns or masts arranged on the edge of the bridge can be bypassed by alternately pulling back the parallel lever with the bridge underside device installed. In the swung-out state, the parallel levers only have to be so far apart from each other that the mast in question finds space between them.

A major advantage of this design is that the work platform can be folded out of the lift tower from a work position parallel to the bridge and can accordingly be transported lying on the lift tower with the floor up.

In particular for inner-city bridges that must be available to traffic across their entire width, it is proposed that the intermediate girder be attachable to the narrow side of a mobile portal scaffold. It can be the same intermediate carrier that is otherwise articulated on the parallel levers of the chassis. Instead, it is connected to length-adjustable cantilevers of the portal scaffolds, which are expediently attached to a carriage that can be moved in the vertical direction on the portal scaffold. To bypass lampposts or the like, three cantilevers arranged at horizontal intervals, individually length-adjustable and detachable from the intermediate carrier can also be provided here.

A further proposal amounts to taking the load-bearing portal on the same road transport vehicle as the rest of the device. The portal frame is preferably horizontal and transverse to Direction of passage telescopic and provided with castors. It has an opening for a road vehicle on a narrow side, on which a structural unit consisting of the intermediate carrier, the guide element, the lifting tower and the work platform is loaded. Suitable connecting elements are provided for this purpose in order to additionally accommodate the portal scaffolding on this road vehicle. On the other narrow side of the portal frame, which is in the loaded position on the rear of the vehicle, the receiving devices for the intermediate carrier and the other components of the device are attached.

The basic idea of the invention also has a favorable effect in a combined device according to the following proposal, which can be used either as a deep working platform, in particular for the cap area of bridges, or as a high working platform. The rotational movement of the guide element and its horizontal axis extend over at least 180 °. As a result, the lifting tower can be brought into two vertical positions with opposite orientation, so that the work platform fixed in this case at right angles to the lifting tower is located in one position at the bottom and in the other position at the top, the work platform being designed for double-sided use. It can be turned around its longitudinal axis or can be equipped with a floor that can be used on both sides, additional railings being provided that can be folded around the floor longitudinal edges. In the case of a smaller device of this type, the lifting tower assumes the vertical position with the work platform at the top during the transport journey, the railings pointing downward. In this case, since the lifting tower must be relatively short with regard to the permissible road transport height, it is proposed that it can be extended by attachable segments. In such a device, the intermediate carrier can be on a around a vertical axis pivotable turntable of the chassis. This turntable is preferably so long that the guide member protrudes beyond the chassis outline in each of its positions. With such a device, for example, so-called gantries on motorways can be made quickly and safely accessible during assembly and repair work.

Finally, it is proposed that the angle of rotation range of the rotary drive of the guide member is at least 270 °, which makes it possible for any bridge underside devices with a work platform that can be folded up onto the lifting tower

To dispense with the drive device for this folding movement. Hydraulic cylinders or cable winches are usually installed for this purpose. If the direction of rotation is selected correctly, the folding and unfolding of the work platform moves freely in accordance with the rotary movement until the angle lock is reached.

Embodiments of the invention are described below with reference to the drawing. In detail shows

1 is a side view of a bridge underside device loaded on its chassis for road transport,

2 shows the top view of the device according to FIG. 1,

3 shows the view of the device according to FIG. 1 in the direction of travel,

4 shows the top view of the device according to FIG. 1 after the parallel arms have been pivoted out, FIG. 5 is a side view of the device of FIG. 1 on the bridge during the assembly process,

6 is a view of the device of FIG. 1 in the longitudinal direction of the bridge in the operating state,

Fig. 7 is a side view of another

Bridge underside device in the loading position on a road transport vehicle,

8 shows the device as in FIG. 7 on a smaller scale at the beginning of the assembly process,

9 is a plan view on a scale like FIG. 8 with two further intermediate positions during assembly,

Fig. 10 is a plan view like Fig. 9 with another

Intermediate position in the construction of the device according to FIG. 7,

Fig. 11 is a side view of a combined portrait and

Deep working platform in a ready position for road transport,

12 is a view of the device of FIG. 11 in the operating position as a high-work platform,

13 shows the top view of the device according to FIG. 11 when it is provided as a deep working platform,

14 is a side view of this device in further intermediate positions,

Fig. 15 is a side view in the operating position as a deep working platform along the edge of the bridge and Fig. 16 is a view of this device in

Longitudinal direction of bridge in operating position as bottom view device.

The device according to Figures 1 to 6 is built on a five-axle semi-trailer, which also serves as a transport and operating chassis. With the help of the air pressure suspension device of the three middle axles, the chassis 1 is raised so far during road transport that the wheels 2 and 3 of the unsprung outer axles stand out from the road. The lifting tower 4 has a rotatable lower lifting part 5. The work bridge 7, which has a telescopic additional bridge 8, is articulated thereon about a folding axis 6. The lifting tower 4 is guided in a longitudinally movable manner on an elongated flat guide member 9 with its corner spars facing this guide member. The reinforced bars have a corresponding cross-sectional profile and, in the case of a rack and pinion drive, a rack. The guide member 9 is rotatably mounted on a flat intermediate support 11 about a horizontal axis of rotation 12 by means of a turntable. Precautions have been taken to ensure that a rotational movement of at least 270 ° is possible in both directions. The intermediate carrier 11 is mounted on the chassis 1 by means of two parallel levers 13 and 14. The chassis-side joints are located on a bearing block 15. The joint axes run perpendicularly, so that the intermediate carrier 11 and with it all other parts can be lifted laterally from the chassis parallel to itself in their transport position.

Fig. 4 shows the completed unloading movement at the edge of a bridge 16. In contrast to the previous figures, a third parallel lever 18 is shown here to demonstrate the avoidance of lampposts 17 or the like at the edge of the bridge the other two and is arranged slightly raised. By swiveling the parallel levers by a little more than 90 °, the still collapsed parts of the device were raised beyond the edge of the bridge, where they are initially still in the horizontal position. The work platform 7 is at the top and, as also shown in FIG. 3, has its bottom up.

If the arrangement is now viewed according to FIG. 5 from the outside of the bridge, the lower part of the lifting tower 5 initially points to the left. The lifting tower is now turned to the right (arrow in Fig. 5). As soon as it is vertical, the work platform 7 hangs freely downwards and detaches from the tower during the further rotary movement. 5, the tower has already covered an angle of 150 °. As soon as 30 ° have been covered, the edge of the work platform on the lower part 5 of the lift tower, designated 19, comes to rest. With a further 90 "rotation, the work platform does not move with respect to the tower. It finally stands horizontally and can be swiveled under the bridge after the lifting tower 4 has been lowered accordingly. Finally, the additional web 8 extends. This work position is shown in FIG. 6 seen from the pillar of the bridge The dismantling of the device proceeds in the reverse order and with the opposite direction of rotation with respect to the axis of rotation 12.

If the third parallel lever 18 is present according to FIG. 4, lampposts 17 can be bypassed in the assembled state of the device. For this purpose, it is also necessary that, as also shown in FIG. 4, all three parallel levers are telescopic and individually detachable from the intermediate carrier 11. The arrangement is such that two parallel levers alone can carry the bridge inspection device. The figure shows how the parallel lever 13 is released from the intermediate carrier and is withdrawn as long as the chassis moves to the left until the lamppost 17 is between the parallel levers 13 and 18. In this position, the parallel lever 13 is coupled again and the parallel lever 18 is withdrawn, etc.

The device shown in FIGS. 7 to 10 works with a portal frame that can be moved on castors, consisting of a horizontal upper part 20 and two side parts 21 and 22. The upper part has two telescoping sections 23 and 24, each of which is firmly connected to a side part . These sections can consist of telescopic tubes, lattice masts, a lattice work or the like. A three-axle truck serves as a pure transport vehicle. On the one hand, it carries a structural unit consisting of intermediate support 11, slewing ring 10, guide member 9, lifting tower 4 and work platform 7 as described in the first example and in FIG. 1 and, on the other hand, the portal frame retracted to its shortest position. Legs 25 equipped with castors are folded up at the four corners. The unit is lower than the portal frame with the legs folded up. The two side parts of the portal frame are designed differently. The side part 21 forms a large opening, so that, according to FIG. 8, after the legs 25 have been unfolded, the portal frame stands on the roadway, in particular a bridge, and the truck can extend through the opening of the side part 21. The further assembly process results from FIGS. 9 and 10. The portal scaffold is first unloaded in the direction of travel, ie in the longitudinal direction of the bridge, and then rotated with the aid of its castors (dash-dotted in FIG. 9) until it assumes a position transverse to the bridge. The truck now also moves in the longitudinal direction of the bridge and thus parallel to the side wall 22 of the portal scaffold. On this side part there is a slide that can be moved up and down, the horizontal, telescopically extendable arm 26 has. These are connected to the joint liquors of the intermediate carrier 11. By raising the carriage mentioned on the side part 22, the assembly is lifted off the truck and the truck can move away. Sections 23 and 24 of the upper part of the portal scaffold are now moved apart until the side part 22 comes to rest on the edge of the bridge and the portal scaffold spans the entire street. If necessary, the arms 26 can also be extended further, so that the structural unit is raised above the bridge and initially still held horizontally on the portal frame. This is shown in FIG. 10. The further construction of the device takes place as described in the first example.

The device according to FIGS. 11 to 16 consists of a chassis in the form of a trailer 30, on which a turntable 31 is rotatably mounted a little behind the center about a vertical axis 32. There is a weight 33 at the shorter end of the turntable 31 pointing forward and at the rear end a guide member 35 is rotatably mounted about a horizontal axis of rotation 36 by means of a turntable 34. In the guide member 35, a lifting tower 37 can be moved in the longitudinal direction on its corner spars provided with toothed racks. A pinion is attached to the guide member 35. At the upper end of the lifting tower 37, a square corner segment 39 is rotatably mounted about an axis of rotation 40 by means of a further rotating ring 38, which extends in the direction of the central axis of the lifting tower. A work bridge 41 and an additional bridge 42 pushed into it are fastened to the corner segment. The bottom of the work platform, which can thus rotate in a horizontal plane around the lifting tower 37, is at the top in this transport position.

The use of the device for work above the carriageway will first be explained. Already in the 11 or with the turntable rotated by 90 ° according to FIG. 12, the lifting tower can be raised until its lower end almost reaches the guide member 35. In this position, it is possible to attach a further lifting tower segment 43, which also contains a rack section, at the bottom, for example by bolting. After raising the height of this segment, a further lifting tower segment 44 can be attached, which is shown in FIG. 12. The lift tower segments can be accommodated on the trailer 30 and carried to the construction site. When the required working height is reached, the additional web 42 can be extended so that the working web thus reaches its full length. Since, as mentioned, the work platform floor is at the top, provision is made according to FIG. 12 to attach foldable additional railings 45 and 46 to the work bridge 41 and to the additional bridge 42. The work platforms can be climbed through the lifting tower 37 and the slewing ring 38.

The high-work platform constructed in this way according to FIG. B. used for repairs to a gantry bridge or another bridge spanning the roadway across or at an angle. The direction in the horizontal can be set as desired by rotation about the pivot axis 32 or the pivot axis 40. In tunnels, the work platforms would be left in the starting position in the longitudinal direction of the trailer. A parallel transverse movement is possible by rotating in opposite directions about the two axes 32 and 40. With the addition of the vertical movement of the lifting tower 37, the work platform can be moved parallel upwards along a curved tunnel wall.

The structure of the device for working under a bridge 47 is described below with reference to FIGS. 13 to 16 described. 13, the trailer 30 has moved parallel to the edge of the bridge. The turntable 31 was placed transversely so that it protrudes beyond the edge of the bridge and the work platform 41, 42 was also rotated by 90 ° with respect to the lifting tower 37, so that it is now outside and above the bridge 47 parallel to it. Now the peculiar rotary movement for this device of the rigid angular configuration consisting of the lifting tower 37 and the work webs 41, 42 takes place by 180 °. This is shown in FIG. 14. Fig. 13 is shown in broken lines and the position obtained after the rotation is fully extended.

The work platform is in this position at about the same height as the bridge (Fig. 15). The lifting tower 37 is therefore lowered and supplemented with one or more lifting tower segments, if necessary.

In such a position, the frequent maintenance work on the cap edge of a bridge can be carried out very well. As soon as the work platform is deep enough by further extension of the lifting tower, it can be pivoted under the bridge and, if desired, extended by extending the additional web 42. 16 shows this in the longitudinal direction of the bridge.

The movements back into the transport position according to FIG. 11 run in the reverse order. Of course, the trailer 30 could also be a truck or other special vehicle. --T3-

1 chassis 25 leg

2 wheels, unsprung 26 arms

3 wheel, suspension 30 trailers

4 lifting tower 31 turntable

5 lower part of the lifting tower 32 swivel axle

6 folding axis 33 weight

7 work platform 34 slewing ring

8 additional bridge 35 management body

9 guide member 36 axis of rotation

10 slewing ring 37 lifting tower

11 intermediate carrier 38 slewing ring

12 axis of rotation 39 corner segment

13 parallel lever 40 axis of rotation

14 parallel lever 41 work platform

15 bearing block 42 additional web

16 Bridge 43 lift segment

17 lampposts 44 lifting tower segment

18 parallel levers 45 additional railings

19 Edge 46 additional railings

20 top part 47 bridge

21 side panel, open

22 side panel, connection

23 section

24 section

Claims

Expectations :

1.Bottom underside device with a chassis, an intermediate carrier attached to the chassis, a guide member mounted on the intermediate carrier rotatable about a horizontal axis of rotation, a lifting tower with four corner bars, which is received by the guide member and movable vertically to its axis of rotation, and one which is rotatably mounted on the lifting tower about its longitudinal central axis Lower part of the lifting tower and a work platform attached to it, characterized in that the guide member (9; 35) has a flat shape and is only in sliding engagement with the two adjacent corner bars of the lifting tower (4; 37), and that these corner bars have a higher load capacity are designed as the two other corner posts.

2. Device according to claim 1, characterized in that the guide member (9; 35) is mounted on the intermediate carrier (11; 31) by means of a rotating ring (10; 34).

3. Apparatus according to claim 2, characterized in that the guide member (9) with respect to its axis of rotation (12) has a shorter, to the free end of the tower and a longer, to the work platform (7) facing section.

4. The device according to claim 1, characterized in that the lifting tower (4; 37) by means of a on the guide member (9; 35) mounted rack and pinion drive, which cooperates with at least one rack mounted on the lifting tower.

5. The device according to claim 1, characterized in that the intermediate carrier (11) is mounted on the chassis (1) by means of a lever parallelogram pivotable about vertical axes from at least two levers (13, 14).

6. The device according to claim 5, characterized in that the parallel levers are telescopic.

7. The device according to claim 5, characterized in that three individually telescopic and from the intermediate support (11) releasable parallel lever (13, 14, 18) are provided.

8. The device according to claim 1, characterized in that the work platform (7) from a parallel to the bridge working position out to the lifting tower (4) can be folded up and transported lying on the floor with this.

9. The device according to claim 1, characterized in that the intermediate carrier (11) on the narrow side (22) of a mobile portal frame is attachable.

10. The device according to claim 9, characterized in that the intermediate carrier (11) by means of length-adjustable boom (26) is connected to the portal frame.

11. The device according to claim 10, characterized in that three horizontally arranged, individually length-adjustable and detachable from the intermediate support arm are provided.

12. The apparatus according to claim 10, characterized in that the length-adjustable boom (26) are attached to a carriage movable in the height direction on the portal frame.

13. ^' Device according to claim 9, characterized in that the portal frame is telescopic horizontally and transversely to the direction of passage and provided with castors and that it has an opening for a road vehicle on a narrow side (21), on which one from the intermediate carrier (11) , the guide member (9), the lifting tower (4) and the work platform (7) existing structural unit is loaded, and that connecting elements are provided for additional reception of the portal scaffold on this road vehicle.

14. The apparatus according to claim 1, characterized in that the lifting tower (37) can be brought into two vertical positions with opposite orientation by corresponding rotary movements of the guide member (35), the work web (41) in one position below and in the other position is above, and that the work platform (41) is designed for double-sided usability.

15. The apparatus according to claim 14, characterized in that the work web is designed to be reversible about its longitudinal axis.

16. The apparatus according to claim 14, characterized in that the work bridge (41) has a bottom that can be used on both sides and additional railings (45, 46) that can be folded around the longitudinal longitudinal edges by 180 ".

17. The apparatus according to claim 14, characterized in that the lifting tower (37) assumes the vertical position with the work platform (41) located above during transport and does not exceed the permissible transport height.

18. The apparatus according to claim 14, characterized in that the intermediate carrier is attached to a pivotable about a vertical axis (32) turntable (31) of the chassis (30) so that the guide member (35) projects beyond the chassis outline in any position .

19. The apparatus according to claim 14, characterized in that the lifting tower (37) by attachable segments (43, 44) can be extended.

20. The apparatus according to claim 1, characterized in that the angle of rotation range of the rotary drive of the guide member (9) is at least 270 °.