EP0640723B1 - Portable bridge - Google Patents

Description

• einen Grundkörper, der zumindest zu einem Ende hin in der Höhe abnimmt,
• mindestens einen Fahrbahn-Abschnitt, der um eine waagerechte, vom Ende des Grundkörpers entfernt angeordnete Querachse schwenkbar ist, und zwar zwischen der auf dem zugehörigen Ende des Grundkörpers aufliegenden Auffahrposition und einer davon abgehobenen Kupplungsposition,
• und eine um eine weitere Querachse am Grundkörper angelenkte Stütze,

sowie ein Fahrzeug zum Zusammenkuppeln zweier Brückenabschnitte zu einer Brücke der eingangs genannten Art und ggf. zum Verlegen einer solchen Brücke.The invention relates to a layable bridge, which consists of at least one bridge section, which has the following parts:

• a base body that decreases in height at least towards one end,
• at least one section of roadway which can be pivoted about a horizontal transverse axis which is arranged at a distance from the end of the base body, namely between the ascending position resting on the associated end of the base body and a coupling position lifted away therefrom,
• and a support articulated on a further transverse axis on the base body,

and a vehicle for coupling two bridge sections together to form a bridge of the type mentioned at the outset and, if appropriate, for laying such a bridge.

A generic bridge is known from EP-A1-0 374 019, the bridge section in height on both sides falls off and has a transverse axis in the middle which is hinged a foldable road section. At the embodiment of FIGS. 1 to 19 of EP-A1-0 374 019 are the supports on the bridge body articulated and up against the foldable road section swiveling. A disadvantage of this Construction isn't just that the supports are different are trained. You are in the ascending position of the Bridge section with its free ends to the middle of the Bridge section aligned and can thus yourself not be used as a ramp part. They also have to Support the known device on its entire Swivel path are guided or raised to the swiveling Road sections up to their uppermost position move. The large travel distances required for this again complex lifting devices.

It is known from EP-A1-0 374 019 to build a bridge just a single bridge section over a narrow one Obstacle to be laid, the foldable road sections rest on the assigned ends of the base body, or one consisting of two bridge sections Lay bridge over a wider obstacle. In the second In this case, the foldable road sections are raised or swung up and from the supports against the Supported body.

EP-A1-0 374 019 also discloses an armored personnel carrier for laying a bridge, existing, as required from one or two bridge sections. The armored personnel carrier has one on each side at its front end rigidly connected to the tank, arranged vertically Hydraulic cylinder and at its rear end on each Side on an obliquely arranged hydraulic cylinder. The The piston rod of the front cylinder is designed to be telescopic, with the inner rod at its free end carries a fork that attaches the ramp wedge to one on it Capture the peg and support the foldable Part of the roadway can pivot upwards, and the outer tubular rod at its free end a plate or Flange to support one end of the concerned Has bridge section. The disadvantage here is that the bridge section on the installation armor in the longitudinal direction must be positioned exactly so that the fork on the inner piston rod grip the pin on the ramp wedge can and that during the detection of the coupling necessary horizontal movement of two bridge sections cannot be done.

The present invention is based on the object Bridge sections of a bridge of the type mentioned so improve that the supports for the foldable road sections and the associated foldable lane sections when laying a bridge with little effort brought into their intended position quickly and safely can be.

• die Stütze flachliegend nach außen, d.h. von der Mitte des Brückenabschnitts wegweisend,
• der schwenkbare Fahrbahn-Abschnitt sich mit seinem freien Ende auf der Stütze abstützend
• und die Stütze mit ihrem freien Ende (im Falle eines Rampenkeils: mit der Spitze desselben) - von der Mitte des Brückenabschnitts gesehen - über das freie Ende des Fahrbahn-Abschnitts hinausragend

angeordnet ist.This object is achieved in that at the opening position of the relevant end of the bridge section

• the support lies flat on the outside, ie pointing away from the middle of the bridge section,
• the free end of the swiveling roadway section is supported on the support
• and the support with its free end (in the case of a ramp wedge: with the tip of the same) - viewed from the center of the bridge section - projecting beyond the free end of the road section

is arranged.

Due to the flat position of the support described, this can when starting up vehicles as ramp wedges to serve. In this respect, the road section on the support rests by swiveling the support upwards Road section to be raised with. So far the prop as driving and the road section as be considered driven. The fact that the roadway section rests with its free end on the support is a cheap long lever arm, which reduces the driving forces can be kept small. The support protrudes - at least in the opening position - over the assigned Road section to the outside. This has the following positive effect: as soon as the supports of two against each other directed bridge sections at least partially, i.e. are swung up with a partial height, causes the bridge sections to be pushed together a further swiveling of the supports automatically and thus a lifting of the road sections into the Clutch position.

Advantageous developments of the invention are in the subclaims described. So the transverse axis is the Support, especially in the opening position, behind the free end of the road section, i.e. from the free end towards the middle of the bridge section offset, arranged. With this arrangement there is always a given "positive" effective lever arm around the transverse axis, when the swiveling road section through the support should be lifted with.

In order to improve efficiency, it is also planned that the support on its facing the road section Side has a guide profile, in the simplest case consist of strips running in the longitudinal direction of the bridge can. A leadership or Support the support element of the road section.

To ensure a stable position of two coupled ones To reach bridge sections, the supports, each seen from the middle of the bridge sections, be slightly inclined outwards. To this position each To be able to keep safely is another advantageous further training provided that the guide profile at the free end of the support an end or Has limit stop.

To establish a clear kinematic relationship between the support and the foldable road section, the guide profile is preferably a guide groove and the guide element as engaging in the groove Stud formed. In an advantageous further development the guide element is also designed as a guide roller be. Through the interaction of the guide groove and bolt or leadership role is an unintentional lifting of the collapsible roadway section safely avoided.

In order to be able to use the support universally, it is preferably designed as a ramp wedge, the Guide profile above the driving surface or top of the Ramp wedge is arranged.

For a convenient take-along of the foldable road sections through the support the guide profile - in seen flat state of the support and from its free End viewed in the direction of the transverse axis - one in Medium increasing course, it is advantageous if the guide profile is initially a short, steep course and then a course with a lower gradient having. It is also advantageous if the guide profile a section at its end facing the transverse axis has a flat course.

To the individual bridge sections as easily as possible to be able to lay and couple with each other if necessary, the base body has and is a lower chord area for this with an actuatable via a clutch mechanism Provide locking device. The locking device is preferably a pin coupling educated. According to a further advantageous embodiment the clutch mechanism can be operated from the outside.

Since the bridge sections with each other only with raised Column and raised section of roadway coupled be provided, the support via a mechanical Connection with the clutch mechanism for the To connect locking device such that the Support in the unlocked state of the locking device is pivoted upwards.

In an alternative embodiment of the subject matter of the invention has at least a part of the supports at least a coupling element that is at least one-sided vertical coupling of the supports allows if this touch each other with their free ends or edges. Here is to be understood by "one-sided vertical coupling" be that when lifting or swiveling one Support the other, opposite support is raised. This reduces the effort for Raise the supports in relation to the corresponding ones Device or devices on a laying vehicle. In the simplest case, such a one-sided vertical coupling by a driver finger on one Support to be realized under the other support takes hold.

In a preferred development, the coupling element one of the supports, especially as a bolt trained driver element and the coupling element the other support one in particular as a guide groove trained recess.

The coupling elements are preferably on the side relevant supports arranged, it being sufficient if they only on one side, preferably the inside of the Support, i.e. for bridges with lane elements on the vertical longitudinal median plane of the bridge section facing side are present.

To couple the bridge sections is for the foldable Lane sections provided a hook coupling.

To securely support the bridge, it is beneficial if the ends of the bridge should be as far from the bank as possible. Around To achieve this is an advantageous further training the invention provided the supports in their Opposite as ramp wedges in their flat position to make the bridge base body lockable. This can be done in a special embodiment be brought about that the supports lateral holes have the - in the flat position of the supports - in the range of motion the bolt of the locking device Lower straps lie.

To quickly couple the bridge sections together To be able to prepare a bridge is one of them intended vehicle with a as a coupling crossmember trained actuator for Actuate the coupling mechanism of the locking device of the lower flange of the bridge sections.

In a preferred embodiment is on the vehicle a lifting device preferably for every second support provided in the form of a hydraulic cylinder. At bridges, in which the supports have coupling elements which keeping them at the same height, it is sufficient if only each second support from its flat starting position from the Lifting equipment is raised because the opposite one Support with the coupling elements is raised.

Because the supports swiveled around an axis when lifting and a correspondingly inclined position take, is further provided, the axis of the hydraulic cylinder to be arranged accordingly inclined and the supporting Part of the lifting device, e.g. B. the stamp of a Hydraulic cylinder to form convex.

Fig. 1

einen Brückenabschnitt in der Form einer Kurzbrücke in der Seitenansicht,

Fig. 2

eine aus zwei Brückenabschnitten zusammengesetzte verlegbare Brücke in der Seitenansicht,

Fig. 3

ein Ende des Brückenabschnitts gemäß Fig. 1 in einer auszugsweisen vergrößerten Darstellung,

Fig. 4

das Ende des Brückenabschnitts in der zum Kuppeln mit einem anderen Brückenabschnitt geeigneten Position in der Seitenansicht,

Fig. 5

einen Brückenabschnitt in einem Querschnitt längs der Linie V-V Fig. 3,

Fig. 6

das Ende eines Brückenabschnitts gemäß Fig. 3 in einer teilweise geschnittenen Draufsicht,

Fig. 7

das Ende des Brückenabschnitts in einem Querschnitt längs der Linie VII-VII Fig. 6,

Fig. 8

die Untergurtkupplung an einem Ende eines Brückenabschnitts in einem Längsschnitt längs der Linie VIII-VIII in Fig. 9,

Fig. 9

die Untergurtkupplung in einer teilweise geschnitten Draufsicht,

Fig. 10

die Kupplung der bewegbaren Fahrbahn-Abschnitte vor dem Kuppeln in einer Seitenansicht,

Fig. 11

die Kupplung der klappbaren Fahrbahn-Abschnitte im gekuppelten Zustand in einer Draufsicht,

Fig. 12

die Rampenspitzen einer abgewandelten Ausführungsform zweier aneinander zu kuppelnder Brückenabschnitte während des Aufeinanderzubewegens in einer längs der Linie XII-XII in Fig. 13 teilweise geschnittenen Seitenansicht,

Fig. 13

die Rampenspitzen gemäß Fig. 12 in einer auszugsweisen Draufsicht,

Fig. 14

die Rampenspitzen gemäß Fig. 12 nach dem Berühren in der analog der Fig. 13 teilweise geschnittenen Seitenansicht und

Fig. 15

die Rampenspitzen nach dem Berühren in einer auszugsweisen Draufsicht.

The object of the invention is outlined in the drawing and is explained in more detail below. Show it

Fig. 1

a bridge section in the form of a short bridge in the side view,

Fig. 2

a side view of a layable bridge composed of two bridge sections,

Fig. 3

1 shows an end of the bridge section according to FIG. 1 in an enlarged illustration,

Fig. 4

the end of the bridge section in the position suitable for coupling with another bridge section in the side view,

Fig. 5

a bridge section in a cross section along the line VV Fig. 3,

Fig. 6

3 in a partially sectioned top view,

Fig. 7

the end of the bridge section in a cross section along the line VII-VII Fig. 6,

Fig. 8

the lower belt coupling at one end of a bridge section in a longitudinal section along the line VIII-VIII in Fig. 9,

Fig. 9

the lower chord coupling in a partially sectioned top view,

Fig. 10

the coupling of the movable road sections before coupling in a side view,

Fig. 11

the coupling of the foldable road sections in the coupled state in a plan view,

Fig. 12

the ramp tips of a modified embodiment of two bridge sections to be coupled to one another during the movement towards one another in a side view partially sectioned along the line XII-XII in FIG. 13,

Fig. 13

12 the ramp tips according to FIG.

Fig. 14

the ramp tips according to FIG. 12 after touching in the side view partially sectioned analogously to FIG. 13 and

Fig. 15

the ramp tips after touching in a partial plan view.

The one shown in Fig. 1 in the execution of a short bridge Bridge section A has a base body 1 with lower chord 2 and aligned vertically on this Wall elements 3. The wall elements 3 point in the middle of the bridge section runs parallel to the subsurface 2 and one wedge towards the ends or ramp tapered contour. On the to the Lower flange 2 parallel edge 4 of the wall elements 3 is a solid road section 5. In the transition between the parallel part and the wedge-shaped part of the Wall elements 3 are each a horizontal transverse axis 6, 6 'is provided around which a foldable roadway section 7 or 7 'is pivotable. In transport condition and with the Use the bridge section A as a short bridge the roadway plates 7, 7 'on the wedge-shaped upper Edge 8, 8 'of the wall elements 3.

For coupling two bridge sections at A1, A2 (Fig. 2) there are 2 coupling or locking points at the ends of the lower chords 9 provided. The bridge sections A, A1, A2 have two lateral lane elements 10 which in a known manner - seen in plan view - through alternately as tabs 11 and through two cheeks each 12 given receptacles 13 formed for the tabs 11 are (Figs. 5 and 9). Both the tabs 11 and the Cheeks 12 are provided with holes 14 and 15, respectively Penetration of bolts 16 are provided, which are a coupling or locking the lower chords 2 of two bridge sections A (A1, A2) in forming one from at least enable two bridge sections existing bridge (see Fig. 2).

By a distance f from the coupling point 9 (holes 14 or 15) offset from the central region of the base body 2, are waves 17 in the horizontal transverse direction in the lower flange 2 stored, each with a corresponding swiveling Ramp wedge 18 are firmly connected. The length of the ramp wedges 18 is seen perpendicular to the axis of the shaft 17 - greater than the distance f. In the described embodiment is the accessible length of the ramp wedges 18 about 3.5 f.

At a distance f from the shaft 17 are in the Side walls of the ramp wedges 18 bores 19 arranged, into which the bolts 16 penetrate when the ramp wedges are flat and lock them in relation to the base body 1 can.

Located on the top or driving surface of the ramp wedge 18 each have guide profiles 20 on its sides, which are provided with a guide groove 21, in the free end of the movable track sections 7 and 7 ' arranged guide pin 22 engage. Of course the bolts 22 can also be used with a (not separately shown) be provided leadership role, which in turn engages in the guide groove 21. The guide groove 21 has one to the driving surface of the ramp wedges 18 essentially parallel shape. Looking at a ramp wedge 18 in its flat position according to FIG. 3, the guide groove has at the beginning of the wedge a short, steep section 21.1, followed by a long one Section with a lower gradient and - in the area above the coupling point 9 - a short, flat section 21.3 on.

If the ramp wedge 18 is pivoted up, it moves the Pin 22 and thus the road section 7 and 7 'with up. So that the road section 7 or 7 'through the ramp wedge 18 with the best possible efficiency can be raised, the road section 7 or 7 'measured in length so that its free end in the lower "opening position" - from the middle of the Bridge section seen - protrudes beyond the shaft 17.

The end of the guide groove given by section 21.1 21 represents a limit stop 21.11 which the steepest position of ramp wedge 18 when engaging Guide pin 22 sets. The steepest position of the Ramp wedge 18 corresponds to the top one, essentially Position of the road section parallel to the lower flange 2 7 or 7 '(see FIG. 4). In this position points the end section 21.1 only an extremely slight slope on, so that the road section 7 even at large Can support the load well. With respect to one optimal dimensioning, it can be cheap Lane section 7 or 7 'in the top so-called "Coupling position" immediately (and not via the Support guide pin 22) on the ramp wedge 18.

Conversely, the road section 7 or 7 'from it lowest, lying on the lower flange 2 upwards pivoted, the ramp wedge 18 is over the guide groove 21 pivoted upwards by the guide pin 22.

In the position of the ramp wedge 18 shown in FIG. 4 and the road section 7 become the bridge sections A coupled together to form a bridge. The in Fig. 2nd Bridge B2 shown consists of the two bridge sections A1 and A2.

To couple the bridge parts together, they have the foldable Lane sections 7, 7 'an upper chord coupling 23, which (see FIGS. 10, 11) is structured as follows: a road section, e.g. 7 ', of a bridge section A1 is with a possibly two-part bolt 24 with oblique Sliding surface 25 equipped. The assigned lane section 7 of the other bridge section A2 surrounds one a horizontal axis 26 pivotally mounted T-shaped Hook 27 on. The hook 27 is by a tension spring 28th pressed against a stop 29 and elastic in it Main position suitable for coupling.

The T-shaped head part 30 of the hook 27 has one of the Concave inner surface 31 corresponding to the shape of the bolt 24 and one corresponding to the sliding surface 25 of the bolt 24 lower sliding surface 32. The inner surface 31 has due to their concave formation - in the longitudinal direction of the Hook 27 or the road section 7 seen - one Depth g.

The bolts 16 for the coupling point 9 of the lower chords stand at the end part of the base body 1 by the Cheeks 12 of the lower flange is formed, in engagement with one Leadership backdrop 33. The leadership backdrop is - of the Seen from the side - U-shaped, the plane of symmetry the U-shape in the longitudinal direction of the lower chords 2 runs and the clear width between the upper and the lower leg of the backdrop 33 essentially the Diameter of the bolt 16 corresponds. Both legs point - seen in the top view - corresponding V-shaped control grooves 34, in the top and engage pins 35 arranged at the bottom of the bolt 16.

The guide link 33 is by a on the lower chord 2nd of the base body 1 supporting compression spring 36 at the end the base body or its lower flange 2 pressed in which position (see FIG. 9) with the pin 35 in Points of engagement of the control groove 34 a wide Distance from each other. They are in this position Bolt 16, controlled by the pin 35, in its outer, position suitable for coupling. The backdrop 33 can counter the force of the spring 36 by a tension element 37 in Direction towards the middle of the lower chord 2 or the bridge body 1 can be drawn. In this position the backdrop 33 have those in engagement with the pin 35 Points of the control grooves 34 a small distance from each other. In this position of the backdrop 33 are the Bolt 16 accordingly in its innermost, non-coupling Position.

The tension member 37 is at a point on the circumference Driving or clutch disc 38 in the form of a circular sector attached. The clutch disc 38 is on one Coupling shaft 39 attached from the outside by a only with the part 40 indicated laying device Laying vehicle via a on the coupling shaft 39 attached crank 39 'is actuated. Part 40 can e.g. a lifting and lowering coupling crossbar.

On the clutch shaft 39 is another clutch or Driving plate 41 attached via a tension element 42 with a clutch or attached to the shaft 17 Drive plate 43 is in a kinematic connection. The Tension element 42 stands with the imaginary connecting line or plane of the waves 17 and 39 "crosswise", d. H. at a rotation of the clutch shaft 39 in the sense that the Move the bolt 16 into the non-coupling position, the ramp wedges 18 via the tension element 42, the drive plate 43 and the shaft 17 pivoted up at least so far that the tips of the ramp wedge 18th lie above the shaft 17, so that another erection the ramp wedges when moving the bridge elements together A1, A2 is possible.

When the bridge sections A1, A2 move together with the Bridge sections 7 and 7 'in the upper position the hook 27 slides with its sliding surface 32 over the corresponding sliding surface 25 of the bolt 24 in the Coupling position and is by the tension spring 28 in the Dome position maintained.

To uncouple the upper chord coupling 23, the lower chord coupling is first (Bolt 16) loosened, then the two Roadway sections 7, 7 'by moving the Bridge sections A1, A2 at least by dimension g so far approximated that the head part 30 of the hook 27 through Lift the base body 1 of the right bridge section A2 can be lifted over the bolt 25. After that you can the two bridge sections are moved apart.

Finally, coupling the two together again Bridge sections described in connection: The Bridge sections are with lowered road sections 7, 7 'and correspondingly flat ramp wedge 18 moved together at the same height until touch the tips of the ramp wedges 18. The bolt 16 of the Bottom belt couplings are in the locking Status. With the help of the coupling cross member 40 Crank 39 'of the clutch shaft 39 and thus the clutch discs 38 and 41 rotated in the sense that on the one hand the guide link 33 withdrawn and thus the bolts 16 in their the recordings 13 between the cheeks 12 releasing position and on the other hand simultaneously the ramp wedges 18 are raised to above the height of the shaft 17 will.

It is sufficient if the ramp wedges 18 are swiveled up the coupling cross member 40 takes place in this position. The further swiveling of the ramp wedges 18 (and lifting the road sections 7, 7 ') is brought about that the contacting bridge sections A1, A2 from this position continue to be pressed against each other until the ramp wedges 18 have completely erected and the road sections 7, 7 'in their highest position bump into each other. It automatically snaps spring-loaded hook 27 of a section 7 behind the bolt 24 of the other section 7 '. By lowering the coupling cross member 40, the crank 39 'is released and the bolt 16 by the compression spring 36 in its locking Position pressed. So that are both top and bottom Lower strap of the bridge sections locked.

To disconnect the bridge sections, the lower chord coupling is used first loosened with the bolts 16. By lifting that part of the bridge section remote from the hook 27 A2 become the adjacent bridge sections 7, 7 'moved together by dimension g. By lifting the end of the bridge section A2 with the hook 27 the top flange coupling and the bridge sections are also released A1, A2 can be separated from each other. By Lowering the crank 39 ', the bolts 16 are again in their locking position and the road sections 7, 7 ' and ramp wedges 18 controlled by the "roadway or Coupling position "in the" ramp or opening position " transferred.

In a modification of the decoupling process described the hook 27 of the upper belt coupling for decoupling also individually e.g. by a at 44 on the associated lane section 7 supported Bowden cable 45 are operated, whereby Avoid lifting the entire bridge section becomes. The Bowden cable can preferably with its other end supported on the lower flange area 2 of the bridge section his and its inner element in the for the tension element 37 described manner from the clutch shaft 39 be operated.

In a modified embodiment, the Ramp wedges 18a of the bridge sections each on one Page - e.g. B. the inside - next to the guide profile 20 a two tabs 46 having holder 47 with a Bolt 48 on, the axis of which approximately in the to the edge 49th the tip of the ramp wedge 18a Level lies, but at least parallel to this runs.

The ramp wedges 18b have the same side a holder 50 with a parallel to the bottom of the ramp wedges 18a and 18b and parallel to the relative movement of the two bridge sections extending opening 51 in shape a guide groove. The end 52 is the holder 50 under the opening 51 shorter than the end 53 over the Opening.

If two bridge sections of this embodiment are on one Laying device by a known Drive (see e.g. EP 0 256 446 A2, Fig. 7, 10) on top of each other moves, the bolt 48 of one ramp wedge arrives 18a into the opening 51 of the holder 50 of the other Ramp wedge 18b. If the edges 49 of the ramp wedges 18a, 18b touch at least approximately, the horizontal Relative movement ended. In this embodiment omitted by the drive plates 41, 43 and that Traction element 42 given coupling between the ramp wedges 18 and the coupling shaft 39 (see FIGS. 3 and 4). By Actuation of the coupling cross member 40 (see FIG. 9) the bolts 16 in the manner already described in the decoupling position withdrawn and it becomes a Stamp 55 raised, which is under the ramp wedge 18a located. The punch 55 is the end of the piston rod Hydraulic cylinder, which is already on the Coupling traverse 40 indicated laying vehicle arranged is.

When the punch 55 is raised, the ramp wedge 18a immediately raised. At the same time, indirectly the bolt 48 and the upper end 53 of the holder 50 also the ramp wedge 18b raised. This lifting is done this way long until the edge 49 of the ramp wedges 18a, 18b overlap the axis of rotation of the shafts 17 (see. Fig. 4, 6). At The movement of the stamp reaches this position 55 stopped after a relatively short stroke and in due course withdrawn, and it becomes the drive of the laying device for at least one bridge section again in the Senses actuated that the bridge sections continue on each other to be moved. The bolt 48 slides from the shorter end 52, while the longer upper end 53 still fulfills a supporting function. Mutual support the ramp wedges 18a, 18b inclined upwards now over its edges 49 by another horizontal Moving the bridge base body 2 towards one another

When supported by the punch 55, the ramp wedge takes 18a different inclinations. This is the case with Arrangement of the stamp 55 takes into account that its axis or direction of movement 56 against the perpendicular has an angle that is approximately half the angle of Base area of the ramp wedge 18a against the horizontal on End of stroke of the punch 55 corresponds. Besides, is the support surface of the stamp 55 is convex to a Edge pressure at the different positions of the Avoid ramp wedge 18a.

Claims (27)

1. Portable bridge comprising at least one bridge section (A; A1, A2), which has the following parts:

   a base unit (1) which decreases in height at least towards one end,

   at least one road surface section (7, 7'), which may be swivelled around a horizontal transverse shaft member (6, 6') arranged remote from the end of the base unit (1), i.e. between the run-up position resting on the corresponding end of the base unit (1) and a coupling position raised by it,

   and a support (18; 18a, 18b) articulated to the base unit (1) around a further transverse shaft member (17),

   characterised in that
   when the respective end of the bridge section is in the run-up position,

   the support (18; 18a, 18b) is arranged to lie flat and point outwards, i.e. away from the centre of the bridge section,

   the swivelling road surface section (7, 7') is arranged so that it is supported at its free end on the support (18; 18a, 18b),

   and the support (18; 18a, 18b) is arranged so that its free end - as viewed from the centre of the bridge section - protrudes beyond the free end of the road surface section (7, 7').
2. Bridge according to Claim 1, characterised in that the transverse shaft member (17) of the support (18; 18a, 18b) is arranged behind the free end of the road surface section (7, 7'), i.e. displaced from the free end towards the centre of the bridge section.
3. Bridge according to Claim 1 or 2, characterised in that the support (18; 18a, 18b) has a guide profile (20) on its upper side facing the road surface section (7, 7').
4. Bridge according to Claim 3, characterised in that the road surface section (7, 7') is supported on the guide profile (20) via a guide element (22).
5. Bridge according to Claim 3 or 4, characterised in that the guide profile (20) has an end stop (21.11) on the free end of the support (18; 18a, 18b).
6. Bridge according to one of Claims 3 to 5, characterised in that the guide profile (20) is constructed as a guide groove (21).
7. Bridge according to Claim 4 and Claim 6, characterised in that the guide element (22) is constructed as a bolt engaging into the guide groove (21).
8. Bridge according to Claim 4, characterised in that the guide element (22) is constructed as a guide roller.
9. Bridge according to one of the preceding claims, characterised in that the support is constructed as a ramp wedge (18).
10. Bridge according to Claim 3 and Claim 9, characterised in that guide profile (20; 21) is arranged above the road surface of the ramp wedge (18).
11. Bridge according to Claim 3 and one of the preceding claims, characterised in that the guide profile (20; 21) has an on average ascending course - when the support (18) is in flat state and when viewed from its free end towards the transverse shaft member (17) of the support.
12. Bridge according to Claim 11, characterised in that the guide profile (20; 21) initially has a short, steep course (21.1) and subsequently has a course (21.1) with a lower gradient.
13. Bridge according to Claim 11 or 12, characterised in that the guide profile (20; 21) has a part-section (21.3) with a flat course at its end facing the transverse shaft member (17) of the support.
14. Bridge according to one of the preceding claims, characterised in that the base unit (1) has a lower chord region (2) and for this is equipped with a locking arrangement (16), which may be operated by means of a coupling mechanism (33 to 39).
15. Bridge according to Claim 14, characterised in that the locking arrangement is constructed as a bolt coupling (16).
16. Bridge according to Claim 14, characterised in that the coupling mechanism (33 to 39) may be operated from the outside via an operating member (39').
17. Bridge according to Claim 14 and one of the preceding claims, characterised in that the support (18) is connected via a mechanical connection (39, 41 to 43) to the coupling mechanism (33 to 39) for the locking arrangement (16) in such a way that the support (18) is swivelled upwards when the locking arrangement (16) is unlocked.
18. Bridge according to one of Claims 1 to 16, characterised in that at least part of the supports (18a or 18b) has at least one coupling element (47/48 or 50/51), which permits an at least one-sided coupling of the supports in vertical direction when the supports touch one another at their free edges (49).
19. Bridge according to Claim 18, characterised in that the coupling element (47/48 or 50/51) is arranged laterally on the support (18a or 18b).
20. Bridge according to Claim 18 or 19, characterised in that one support (18a) has a coupling element (47/48) with a driver element (48) and the other support (18b) has a coupling element (50/51) with a groove-like recess (51) to receive the driver element (48) of the first support (18a).
21. Bridge according to one of the preceding claims, characterised in that the foldable road surface sections (7, 7') have a hook coupling (27, 24).
22. Bridge according to one of Claims 9 to 21, characterised in that the supports (18) may be locked in their flat position relative to the bridge base unit (1).
23. Bridge according to Claim 14 and Claim 22, characterised in that the supports (18) have lateral holes (19) which lie in the area of movement of the bolts (16) of the locking arrangement when the support (18) is in flat position.
24. System, comprising two bridge sections (A1, A2) of a bridge according to Claim 14 and at least one of Claims 1 to 23, and a vehicle for coupling the bridge sections (A1, A2) together to form a bridge and if necessary locate the bridge, characterised in that the vehicle has a coupling cross beam (40) for operating the coupling mechanism (33-39) of the locking arrangement (16).
25. System according to Claim 24, characterised in that the vehicle additionally has at least one hoisting arrangement (55) for lifting a respective support (18a).
26. System according to Claim 25, characterised in that the hoisting arrangement (55) is constructed as a hydraulic cylinder with ram.
27. System according to Claim 26, characterised in that the shaft member (56) of the hoisting arrangement (55) is arranged on an incline.

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