EP1799913B1 - Modular scissor bridge and installation device, and method for installing modular scissor bridges - Google Patents

Abstract

Scissors bridge (2) is transportable by means of a transport vehicle (1). It has two bridge modules (4,4') made of one or two pairs of track carriers. All ro-ro ramps are rigidly connected to the modules. Each ramp is provided with a coupling lug that forms an articulated link (5,5'). A shifting device (3) is provided at the front side of the vehicle.

Description

The invention relates to a foldable and in the folded state by means of a transport vehicle transportable modular scissor bridge, consisting of two bridge modules, each formed by a pair or two pairs of track carriers, wherein the spaced track carrier each track carrier pair are connected by tie rods and wherein the bridge modules have ramps at both ends.

The invention further relates to a method for laying modular scissors bridges.

Scissors bridges of the aforementioned type are brought by a transport vehicle in the folded state to its place of use and unfolded there by means of a laying on the transport vehicle laying and stored. The tops of the two bridge modules are designed as lanes for those vehicles for which the scissors bridge is designed.

In a known as foldable transportable bridge called scissor bridge two referred to as bridging bridge modules are provided, which are articulated end hinges to each other, the hinges allow folding and unfolding of the scissor bridge ( DE 689 08 893 T2 ). Here, each bridge section at one of its ends with provided a Auffahrrampe, while the other two ends of the two bridge sections are rotatably connected to each other by a joint located in the lower flange region. Such scissors bridges are easy to manufacture; They are robust and can be laid by technically modest installation facilities. However, these bridges have the disadvantage that their two bridge sections can not be used individually as short bridges with small obstacle widths. This means that even with small obstacles always the two bridge sections coupled together are laid and only used as such.

A significant improvement has been achieved by another modular scissors bridge, in which the bridge modules are designed so that they can be used as a single short bridge (with small obstacle widths) as well as - in the coupled state - as a long two-module bridge ( EP 0 356 561 B1 ). In this known scissors bridge each bridge module is designed as a short bridge, which is provided at both ends with Auffahrrampen. In this case, one ramp each rigid and the other ramp is hingedly connected to the bridge module, so that the two bridge modules after pivoting the bridge center, movable as a result of articulated Auffahrrampen connect so that results in the coupled state, a flat bridge deck. Since these known scissors bridges are short and extremely light bridges with low carrying capacity, the bridges can still be laid by hand. However, for long bridges formed by both bridge modules, assembly aids must be used because of the greater overall weight To be available. In addition, it requires additional preparation work, such as the pivoting of the mobile ramp in the dome position. For bridges of higher load capacity and greater span with a correspondingly higher design weight, no solutions are presently available which make it possible to lay two bridge modules which form a scissor bridge and can be used as a short bridge with a laying device. Known is merely a scissors bridge system, with which foldable scissors bridges and non-detachable individual short bridges can be transported and stored as a two-pack, the two-pack is separated after depositing ( Jane's Military Vehicles and Logistics 1995-96 ).

The invention is based on the object, the above explained, by the EP 0 356 561 B1 Known scissor bridge to improve the effect that their economic use is possible even with required higher load capacity and greater span and correspondingly higher design weight, both in one- as well as in two-module laying method.

• sämtliche Auffahrrampen beider Brückenmodule starr mit den Brückenmodulen verbunden sind,
• jede Auffahrrampe an ihrer Spitze ein als Scharnierteil ausgebildetes Rampenabschlussrohr aufweist,
• jede Auffahrrampe in Abstand von ihrer Spitze mit einer Kupplungslasche versehen ist,
• die Kupplungslasche des im zusammengeklappten Zustand oberen Brückenmoduls mit dem als Scharnierteil ausgebildeten Rampenabschlussrohr des im zusammengeklappten Zustand unteren Brückenmoduls eine Gelenkverbindung bildet.

The solution of the problem is in a modular scissor bridge of the type mentioned is that

• all ramps of both bridge modules are rigidly connected to the bridge modules,
• each ramp has at its tip a hinge termination tube designed as a hinge part,
• each access ramp is provided with a coupling tab at a distance from its tip,
• the coupling lug of the upper bridge module in the folded-up state forms a joint connection with the ramp termination tube designed as a hinge part of the lower bridge module folded in the folded state.

By coupling the two bridge modules by means of the hinge connection according to the invention and the resulting overlap of the ramps each one of the two bridge modules is formed between the two bridge modules a particularly rigid connection. The scissors bridge is therefore also suitable for bridging larger obstacle widths.

In an embodiment of the invention, in the transport state, the coupling tab of the lower bridge module is hingedly connected to the formed as a hinge part ramp termination tube of the upper bridge module, said articulated connection serves as a transport against lifting of the upper bridge module. This ensures safe transport of the scissors bridge.

The scissor bridge according to the invention can be further improved by the fact that each hinge connection can be locked by means of a coupling pin, which is connected via a tension spring with a coupling cable, which is actuated by the device for the installation of the scissors bridge on the located on the bridge modules clutch lever. This ensures that the coupling points of the two bridge modules can be actuated mechanically by the laying device.

A further improvement of the scissor bridge according to the invention is that between the two bridge modules an undervoltage can be provided, the ends of which are fixed to the underside of each one of the two bridge modules and which is guided by the loop of a tether, which is mounted in the articulated connection between the two bridge modules. The undervoltage increases the load capacity of the scissor bridge.

For laying modular scissors bridges of the type described above advantageously a laying device is used, which has an adapter frame connectable to the transport vehicle, which carries a support arm, a Stützarmzylinder, a laying arm and a Verlegearmzylinder. As an universal interface to the transport vehicle, the adapter frame makes it possible to adapt the laying device to different transport vehicles. In the case of a loading by plane, a quick assembly and disassembly of the installation device is possible.

The laying device can be improved by arranging in its laying arm the device for actuating the coupling cable of the coupling device of the articulated connection. As a result, the operation of the coupling cable for the coupling or decoupling of the articulated connection between the two bridge modules is facilitated.

• das Transportfahrzeug in einem solchen Abstand vor dem Hindernis abgestellt wird, dass der vordere Teil der Verlegeeinrichtung sich kurz vor dem Hindernis befindet,
• durch Betätigen des Stützarmzylinders der Stützarm auf den Boden abgesetzt wird, so dass einerseits ein Kipppunkt für die Scherenbrücke geschaffen und andererseits das Transportfahrzeug festgelegt wird, das während des Ablegens der Scherenbrücke als Gegengewicht dient,
• durch Betätigen des Verlegearmzylinders der Verlegearm nach vorn in Richtung Hindernis ausschwenkt, wobei sich die Scherenbrücke zunächst selbsttätig öffnet und bei weiterem Ausfahren des Verlegearmzylinders sich ein Entfaltseil strafft, das mit dem einem Ende an dem Adapterrahmen der Verlegeeinrichtung und mit dem anderen Ende an der Spitze des oberen Brückenmoduls befestigt ist, und somit das nunmehr vordere Brückenmodul in die nahezu horizontale Gebrauchslage zwingt. Dieses Verfahren gewährleistet in Verbindung mit der erfindungsgemäßen Verlegeeinrichtung eine störungsfreie und sichere Verlegung einer modularen Scherenbrücke.

In the laying of modular scissors bridges of the type in question, a method is used in a further embodiment of the invention, in which

• the transport vehicle is parked at such a distance in front of the obstacle that the front part of the Laying device is located just before the obstacle,
• is pressed by pressing the Stützarmzylinders the support arm to the ground, so that on the one hand created a tipping point for the scissor bridge and on the other hand, the transport vehicle is set, which serves as a counterweight during the laying of the scissors bridge,
• by pressing the Verlegearmzylinders the Verlegearm swings forward towards the obstacle, the Scherenbrücke initially opens automatically and further extension of the Verlegarmmylinders a Entfaltseil tightens with the one end to the adapter frame of the laying device and the other end at the top of is fastened upper bridge module, and thus forces the now front bridge module in the almost horizontal position of use. This method, in conjunction with the laying device according to the invention, ensures a trouble-free and safe laying of a modular scissor bridge.

• das Transportfahrzeug in einem solchen Abstand vor dem Hindernis abgestellt wird, dass zwischen dem vorderen Teil der Verlegeeinrichtung und dem Hindernis ein Abstand verbleibt, der größer ist als die Länge eines Brückenmoduls,
• durch Betätigen des Stützarmzylinders der Stützarm auf den Boden abgesetzt wird, so dass einerseits ein Kipppunkt für die Scherenbrücke geschaffen und andererseits das Transportfahrzeug festgelegt wird, das während des Ablegens der Scherenbrücke als Gegengewicht dient,
• durch Betätigen des Verlegearmzylinders der Verlegearm nach vorn in Richtung Hindernis ausschwenkt, wobei sich die Scherenbrücke zunächst selbsttätig öffnet und bei weiterem Ausfahren des Verlegearmzylinders sich ein Entfaltseil strafft, das mit dem einem Ende an dem Adapterrahmen der Verlegeeinrichtung und mit dem anderen Ende an der Spitze des oberen Brückenmoduls befestigt ist, und somit das nunmehr vordere Brückenmodul in die nahezu horizontale Gebrauchslage zwingt,
• das Entfaltseil entfernt und die Gelenkverbindung zwischen den beiden Brückenmodulen gelöst wird,
• das Transportfahrzeug soweit zurückgefahren wird, dass das vordere Brückenmodul nicht mehr auf dem hinteren Brückenmodul aufliegt,
• durch Betätigen des Verlegearmzylinders der Verlegearm das verbliebene Brückenmodul abhebt, so dass dieses Brückenmodul vom Transportfahrzeug aufgenommen werden kann, um andernorts eingesetzt zu werden.

When laying modular scissors bridges of the type in question, wherein the individual bridge modules are laid as short bridges, according to another feature of the invention, a method is used in which

• the transport vehicle is parked at such a distance in front of the obstacle that a distance between the front part of the laying device and the obstacle is greater than the length of a bridge module,
• is lowered by pressing the support arm of the support arm on the ground, so on the one hand created a tipping point for the scissor bridge and on the other the transport vehicle is set, which serves as a counterweight during the laying of the scissors bridge,
• by pressing the Verlegearmzylinders the Verlegearm swings forward towards the obstacle, the Scherenbrücke initially opens automatically and further extension of the Verlegarmmylinders a Entfaltseil tightens with the one end to the adapter frame of the laying device and the other end at the top of is attached upper bridge module, and thus forces the now front bridge module in the nearly horizontal position of use,
• the unfolding cable is removed and the articulated connection between the two bridge modules is released,
• the transport vehicle is retracted far enough that the front bridge module no longer rests on the rear bridge module,
• by actuating the laying arm cylinder, the laying arm lifts off the remaining bridge module, so that this bridge module can be picked up by the transport vehicle in order to be used elsewhere.

This method ensures even with a scissor bridge whose individual bridge modules are laid as short bridges in conjunction with the laying device according to the invention a trouble-free and safe installation of the bridge.

Fig. 1

eine aus zwei Brückenmodulen bestehende Scherenbrücke im zusammengefalteten Zustand auf einem Transportfahrzeug, das mit einer Verlegeeinrichtung versehen ist, in Seitenansicht;

Fig. 2

ein einzelnes Brückenmodul in Seitenansicht;

Fig. 3

das in Fig. 1 dargestellte Brückenmodul in Draufsicht;

Fig. 4

die Spitze einer Auffahrrampe eines Brückenmoduls in einem Schnitt durch das dort vorgesehene Rampenabschlussrohr, wobei sich ein dort vorhandener Kupplungsbolzen in der Grundstellung befindet;

Fig. 5

die in Fig. 4 dargestellte Spitze einer Auffahrrampe in einem der Fig. 4 entsprechendem Schnitt, wobei sich der Kupplungsbolzen in der Kupplungsstellung befindet;

Fig. 6

ein weiters Brückenmodul in einem etwas größerem Maßstab, in Seitenansicht;

Fig. 7

Einzelheiten im Bereich der Spitze einer Auffahrrampe, in größerem Maßstab, wobei eine Kupplungslasche in eingefahrenem Zustand dargestellt ist;

Fig. 8

die in Fig. 7 dargestellte Spitze einer Auffahrrampe, wobei die Kupplungslasche in ausgefahrenem Zustand dargestellt ist;

Fig. 9

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, während des Abhebens der Scherenbrücke, in Seitenansicht;

Fig. 10

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, nach dem Aufsetzen des Stützarms der Verlegeeinrichtung;

Fig. 11

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, während des Ablegens der Scherenbrücke mittels der Verlegeeinrichtung, ebenfalls in Seitenansicht;

Fig. 12

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, nach dem Ablegen der Scherenbrücke mittels der Verlegeeinrichtung, ebenfalls in Seitenansicht;

Fig. 13

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, beim Verlegen der einzelnen Brückenmodule einer Scherenbrücke als Kurzbrücken, nach dem Ablegen des vorderen Brückenmoduls auf der gegenüberliegenden Seite des zu überbrückenden Hindernisses;

Fig. 14

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, beim Verlegen der einzelnen Brückenmodule einer Scherenbrücke als Kurzbrücken, nach dem Lösen der die beiden Brückenmodule verbindenden Gelenkverbindung und dem Entfernen des Entfaltseils sowie nach dem Zurücksetzen des Transportfahrzeugs;

Fig. 15

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, beim Verlegen der einzelnen Brückenmodule einer Scherenbrücke als Kurzbrücken, nach dem Absenken des hinteren Brückenmoduls;

Fig. 16

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, beim Verlegen der einzelnen Brückenmodule einer Scherenbrücke als Kurzbrücken, während des Ablegens des verbliebenen Brückenmoduls auf der gegenüberliegenden Seite des Hindernisses;

Fig. 17

das in Fig. 1 dargestellte Transportfahrzeug mit einer Verlegeeinrichtung, beim Verlegen der einzelnen Brückenmodule einer Scherenbrücke als Kurzbrücken, nach dem Ablegen des verbliebenen Brückenmoduls auf der gegenüberliegenden Seite des Hindernisses.

The invention is explained in more detail with reference to several embodiments shown in the drawing. Show it:

Fig. 1

a scissors bridge consisting of two bridge modules in the folded state on one Transport vehicle, which is provided with a laying device, in side view;

Fig. 2

a single bridge module in side view;

Fig. 3

this in Fig. 1 illustrated bridge module in plan view;

Fig. 4

the tip of a ramp of a bridge module in a section through the ramp termination tube provided there, wherein there is a coupling pin there in the normal position;

Fig. 5

in the Fig. 4 represented tip of a ramp in one of Fig. 4 corresponding section, wherein the coupling pin is in the coupling position;

Fig. 6

a further bridge module on a slightly larger scale, in side view;

Fig. 7

Details in the area of the tip of a ramp, on a larger scale, with a coupling tab is shown in the retracted state;

Fig. 8

in the Fig. 7 illustrated tip of a ramp, wherein the coupling tab is shown in the extended state;

Fig. 9

this in Fig. 1 illustrated transport vehicle with a laying device, during the lifting of the scissor bridge, in side view;

Fig. 10

this in Fig. 1 illustrated transport vehicle with a laying device, after placing the support arm of the laying device;

Fig. 11

this in Fig. 1 illustrated transport vehicle with a laying device, during the removal of the scissor bridge by means of the laying device, also in side view;

Fig. 12

this in Fig. 1 illustrated transport vehicle with a laying device, after the laying of the scissor bridge by means of the laying device, also in side view;

Fig. 13

this in Fig. 1 illustrated transport vehicle with a laying device when laying the individual bridge modules of a scissor bridge as short bridges, after placing the front bridge module on the opposite side of the obstacle to be bridged;

Fig. 14

this in Fig. 1 illustrated transport vehicle with a laying device, when laying the individual bridge modules of a scissor bridge as short bridges, after releasing the joint connecting the two bridge modules and removing the Entfaltseils and after resetting the transport vehicle;

Fig. 15

this in Fig. 1 illustrated transport vehicle with a laying device when laying the individual bridge modules of a scissor bridge as Short bridges, after lowering the rear bridge module;

Fig. 16

this in Fig. 1 illustrated transport vehicle with a laying device, when laying the individual bridge modules of a scissor bridge as short bridges, during the deposition of the remaining bridge module on the opposite side of the obstacle;

Fig. 17

this in Fig. 1 illustrated transport vehicle with a laying device when laying the individual bridge modules of a scissor bridge as short bridges, after placing the remaining bridge module on the opposite side of the obstacle.

This in Fig. 1 illustrated embodiment shows a transport vehicle 1, on which a scissor bridge 2 consisting of two bridge modules rests in the folded state. In the front region of the transport vehicle 1, a laying device 3 is provided. The upper bridge module 4 and the lower bridge module 4 'of the scissor bridge 1 are connected to each other by articulated joints 5 and 5'. However, the articulated connection 5 'serves only as a transport protection against lifting of the upper bridge module 4 in the transport state.

How out Fig. 2 As can be seen from Fig. 3, the upper bridge module 4 is formed of a pair of track carriers 6 which are interconnected by track carrier bars 7. The bridge module 4 is provided at both ends of its straight middle part 8 with ramps 9, have at their top a trained as a hinge part Rampenabschlussrohr 10. Each Auffahrrampe 9 is at a distance from its tip with a coupling tab 11, 11 'versehen..In the illustrated embodiment, one of the coupling tabs 11 in the extended position and the other coupling tab 11' shown in the retracted position. The lower bridge module 4 'is designed accordingly.

The 4 and 5 show the top of a ramp 9 of the in the FIGS. 2 and 3 In the Rampenabschlussrohr 10 is located on each side of a coupling pin 12 which is connected via a tension spring 13 with a coupling cable 14 in connection. By actuating the coupling cable 14, the coupling pins 12 in the normal position ( Fig. 4 ) or in the coupling position ( Fig. 5 ) to be brought. In the basic position of the receiving slot 15 is closed, while the receiving slot 15 is opened in the coupling position and for receiving the coupling tab 11, 11 '(see. Fig. 2 ) is released.

From the in Fig. 6 illustrated embodiment can be seen that the emerging from the Rampenabschlussrohren 10 clutch cables 14 (see. 4 and 5 ) are fastened with their ends to coupling levers 16. By means of this clutch lever 16 via the coupling cables 14, the actuation of the coupling means of the articulated joints 5 and 5 '(see. Fig. 1 ). When the clutch lever 16 is actuated, the coupling bolts 12 are pulled into the coupling position (see FIG. The tension springs 13 are biased, the the coupling pin 12 after release of the clutch lever 16 in the normal position (see. Fig. 4 ) brings.

The function of the coupling tabs 11, 11 '(see. Fig. 2 ) is from the FIGS. 7 and 8 to see. This shows the Fig. 7 the coupling tab 11 'in the retracted position and Fig. 8 the coupling tab 11 in the extended position, ie in dome position. The coupling tabs 11, 11 'preferably each consist of a sheet steel strip with cross-beam 17, wherein the sheet steel strip is provided with a slot. For the guidance of the coupling tabs 11, 11 'in the lower region, a guided through the slot receiving pin 18 is provided which is mounted in the bridge module 4. In the upper region of the coupling tabs 11, 11 'is guided by a Laschenschacht 19, in which the cross-beam 17 slides to prevent rotation about the receiving pin 18. In the transport state, the coupling tabs 11, 11 'in the region in which the undersides of the bridge modules 4, 4' lie on one another (see. Fig. 1 ), withdrawn. The same applies to those coupling tabs 11, 11 ', which are located in laid bridge modules 4, 4' in the area of the supports. Here, tension springs 20 fastened to the cross-beam 17 are tensioned to ensure that the coupling straps 11, 11 'are extended again to the coupling position for the coupling process.

The laying process when laying a two-module scissor bridge is the Fig. 9 to 12 shown.

Fig. 9 shows the transport vehicle 1 with the scissor bridge 2 thereon (see. Fig. 1 ) after approaching By the operation of the Stützarmzylinders 21 of the support arm 22 is pivoted forwardly and thereby has the scissor bridge 3, which consists of the two interconnected by the hinge connection 5 bridge modules 4 and 4 'to the overcome obstacle and the operation of the support arm cylinder 21. is lifted from the transport vehicle 1. Before actuation of the support arm cylinder 21 of the laying device 3 serving as a transport lock joint 5 'by means of the relevant coupling lever 16 (see. Figure 6 ) has been solved.

The laying device 3 is connected via an adapter frame 23 to the transport vehicle 1. The adapter frame 23 is fastened to the transport vehicle 1 by bolt connections 24. Between the adapter frame 23 and the rear tip of the upper bridge module 4, a Entfaltseil 25 is arranged.

At the in Fig. 10 illustrated embodiment, the Stützarmzylinder 21 is extended so far that the support arm 22 rests on the ground. The transport vehicle 1 thereby forms the counterweight for the further steps of the installation process. The tipping point is the support point of the support arm 22 on the ground. Transport vehicle 1, support arm 22 and Stützarmzylinder 21 thereby form a rigid unit. By extending the Stützarmzylinders 21, the two bridge modules 4 and 4 'have opened automatically.

Another step of the installation process is over Fig. 11 to see. By operating the Verlegearmzylinders 26 of the laying arm 27 is forward towards the obstacle swung out, with the bridge modules 4 and 4 'have automatically opened even further, so that finally the Entfaltseil 25 has tightened. In this embodiment, an undervoltage 28 is provided, whose ends are fixed to the underside of the bridge modules 4 and 4 ', one of the two ends on the front seats of the bridge module 4 and the other end on the - in the illustrated position - rear tip of the bridge module 4 '. The undervoltage 28 lies in the loop of a tether 29, which is mounted in the articulated connection 5. The ends of the undervoltage 28 may also be attached to the coupling tabs 11, 11 '. In this case, undervoltage 28 is slightly shorter.

Upon further extension of the Verlegearmzylinders 26 forces the taut deployment cable 25, the bridge module 4, as shown Fig. 12 can be seen, in the almost horizontal position of use. In this case, has formed by the coupled connection and the overlapped joint of the two ramps 9 of the bridge modules 4 and 4 'in the middle of the bridge an arcuate support structure with the sheet stitch 30. The undervoltage 28 is now taut and the tether 29, whose length in this case corresponds to the size of the sheet stitch 30, is located in the area of the sheet stitch 30.

The laying process for laying the individual bridge modules 4, 4 'as short bridges show the FIGS. 13 to 17 , In this case, the laying process initially proceeds analogously as in the laying of a two-module bridge.

As Fig. 13 shows, in this case, the front bridge module 4 is placed so that it comes to rest on the obstacle to be bridged. In this. Position, the hinge joint 5 is achieved in that the clutch lever 16 (see. Fig. 6 ) of one in the laying arm 27 (see. Fig. 11 ), for example, a hydraulic cylinder is operated, so that the coupling pin 12 (see. 4 and 5 ) is pulled from the position "closed" (basic position) to the position "open" (coupling position), and thus the coupling tabs 11 (see FIG. Fig. 2 ) in the bridge module 4 'releases.

From the FIGS. 14 and 15 It can be seen that after releasing the Entfaltseils 25, the two bridge modules 4 and 4 'are separated from each other after resetting the transport vehicle.

The FIGS. 16 and 17 show the recording or laying of the remaining bridge module 4 'elsewhere.

Claims (6)

1. A foldable, modular scissor bridge (2) transportable in the folded state by means of a transport vehicle (1) and consisting of two bridge modules (4, 4') which are formed in each case of a pair or of two pairs of track carriers (6), the spacedly arranged track carriers (6) of each track carrier pair being connected to one another by track carrier rods (7), and the bridge modules (4, 4') comprising access ramps (9) at both ends, characterised in that

   1.1 all the access ramps (9) of both bridge modules (4, 4') are connected rigidly to the bridge modules,

   1.2 each access ramp (9) has at its tip a ramp end tube (10) which is configured as a hinge part,

   1.3 each access ramp (9) is provided with a coupling lug (11, 11') at a distance from its tip,

   1.4 the coupling lug (11) of that bridge module (4) which is at the top in the folded state forms an articulated joint (5) with the ramp end tube (10), configured as a hinge part, of that bridge module (4') which is at the bottom in the folded state.
2. A modular scissor bridge according to claim 1, characterised in that in the transportation state the coupling lug (11') of the bottom bridge module (4') is also connected in articulated manner to the ramp end tube (10), configured as a hinge part, of the top bridge module (4), this articulated joint (5') serving to secure the top bridge module (4) against lifting during transportation.
3. A modular scissor bridge according to claim 1 or claim 2, characterised in that each articulated joint (5, 5') may be locked by means of a coupling pin (12), which is connected via a tension spring (13) to a coupling cable (14), the latter being actuated by a means for laying the scissor bridge (2) by way of the coupling lever (16) located on the bridge modules (4, 4').
4. A modular scissor bridge according to any one of claims 1 to 3, characterised in that an underbrace (28) is provided between the two bridge modules (4, 4'), the ends of which underbrace are each attached to the bottom of one of the two bridge modules (4, 4') and which is guided through the loop of a stay cable (29), which is fitted in the articulated joint (5) between the two bridge modules (4, 4').
5. A method of laying modular scissor bridges according to any one of claims 1 to 4 by means of a laying means which comprises an adapter frame (23) connectable to the transport vehicle (1), which adapter frame bears a supporting arm (22), a supporting arm cylinder (21), a laying arm (27) and a laying arm cylinder (26),
   characterised in that

   5.1 the transport vehicle (1) is stopped at such a distance from the obstacle that the front part of the laying means (3) is located just in front of the obstacle,

   5.2 by actuating the supporting arm cylinder (21), the supporting arm (22) is set down on the ground such that on the one hand a tipping point is created for the scissor bridge (2) and on the other hand the transport vehicle (1) is fixed, the latter serving as a counterweight during laying of the scissor bridge (2),

   5.3 by actuating the laying arm cylinder (26), the laying arm (27) swings out forwards in the direction of the obstacle, the scissor bridge (2) firstly opening automatically and, on further extension of the laying arm cylinder (26), a deployment cable (25) tightening, which deployment cable (25) is attached by one end to the adapter frame (23) of the laying means (3) and by the other end to the tip of the upper bridge module (4, 4'), and thereby forcing the bridge module (4) which is now at the front into the virtually horizontal utilisation position.
6. A method of laying modular scissor bridges, in the form of short bridges, according to any one of claims 1 to 4 by means of a laying means which comprises an adapter frame (23) connectable to the transport vehicle (1), which adapter frame bears a supporting arm (22), a supporting arm cylinder (21), a laying arm (27) and a laying arm cylinder (26), characterised in that

   6.1 the transport vehicle (1) is stopped at such a distance from the obstacle that a distance remains between the front part of the laying means (3) and the obstacle which is greater than the length of a bridge module (4, 4'),

   6.2 by actuating the supporting arm cylinder (21), the supporting arm (22) is set down on the ground such that on the one hand a tipping point is created for the scissor bridge (2) and on the other hand the transport vehicle (1) is fixed, the latter serving as a counterweight during laying of the scissor bridge (2),

   6.3 by actuating the laying arm cylinder (26), the laying arm (27) swings out forwards in the direction of the obstacle, the scissor bridge (2) firstly opening automatically and, on further extension of the laying arm cylinder (26), a deployment cable (25) tightening, which deployment cable (25) is attached by one end to the adapter frame (23) of the laying means (3) and by the other end to the tip of the upper bridge module (4), and thereby forcing the bridge module (4) which is now at the front into the virtually horizontal utilisation position,

   6.4 the deployment cable (25) is removed and the articulated joint (5) between the two bridge modules (4, 4') is undone,

   6.5 the transport vehicle (1) is moved back until the front bridge module (4) no longer rests on the rear bridge module (4'),

   6.6 by actuating the laying arm cylinder (26), the laying arm (27) lifts the remaining bridge module (4'), such that this bridge module (4') may be removed by the transport vehicle (1) so as to be used elsewhere.

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