EP0757131B1 - Bridge element, especially for surmounting gaps by vehicles - Google Patents

Bridge element, especially for surmounting gaps by vehicles Download PDF

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Publication number
EP0757131B1
EP0757131B1 EP96401710A EP96401710A EP0757131B1 EP 0757131 B1 EP0757131 B1 EP 0757131B1 EP 96401710 A EP96401710 A EP 96401710A EP 96401710 A EP96401710 A EP 96401710A EP 0757131 B1 EP0757131 B1 EP 0757131B1
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EP
European Patent Office
Prior art keywords
access
nose
fixed
bridge
element according
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EP96401710A
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German (de)
French (fr)
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EP0757131A1 (en
Inventor
Henri Aubert
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CNIM Groupe SA
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Constructions Industrielles de la Mediterrane CNIM SA
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/12—Portable or sectional bridges
    • E01D15/127—Portable or sectional bridges combined with ground-supported vehicles for the transport, handling or placing of such bridges or of sections thereof

Definitions

  • the present invention relates to a span structure intended in particular for crossing breaches by vehicles, such as armored engineering vehicles.
  • Document FR-A-2 683 837 in the name of the applicant describes a span structure arranged on a vehicle transport so as to be deposited alone or in association with another identical span structure above a breach by an appropriate removal system mounted on the transport vehicle.
  • the invention aims to improve the structure of span described in the document above by realizing a span structure allowing better support the forces applied to it or to an assembly end-to-end of span structures during the phase of launching of the structure of span or structures of span assembled above the breach to be crossed or when vehicles pass over the span structure or the assembled span structures arranged above of the breach.
  • the invention provides a structural structure intended in particular for crossing breaches by vehicles, such as armored engineering vehicles, formed by at least one span element comprising a central rigid box with upper raceway and two access spouts assembled respectively to the two ends of the central box so as to extend the track of the central box, one of the spouts of access being fixed to the central box on the one hand by a transverse pivot axis and on the other hand by unlockable locking means allowing the spout access to occupy a low support position on an edge a breach or a high or raised position coupling to an access spout of another element of span, and which is characterized in that the means of locking include at least two elements drawing parallels arranged symmetrically to the axis longitudinal of the span element and articulated on the access spout by two fixed transverse axes; And two transverse axes of locking with controlled displacement allowing to fix the two elements respectively forming a pull in the central box with two positions different corresponding respectively to the positions low and raised from the
  • the pivot axis of the access spout mentioned above is located in the lower part of this and the locking means of this spout are located in the upper part of the spout and the central box.
  • the transverse locking pins are mounted movable respectively in two bores of the central box and can be engaged each in one of two holes of the corresponding pulling element defining the two low and raised positions of the access spout.
  • the means for controlling the movement of the two transverse locking pins include a transverse shaft rotatably mounted in a housing secured to the central box; two threaded rods secured respectively to the two ends of the shaft rotatable coaxially thereto and on each of which an internally threaded sleeve is assembled constituting a transverse locking axis; and one means for rotating the rotary shaft of so as to move in translation in opposite directions the two sleeves from an unlocking position to a position for locking the tie-forming elements.
  • the means for rotating the rotary shaft includes a drive rod through the housing central and one end part of which is mounted at rotation in the support housing of the rotary shaft and carries a bevel gear meshing with another gear conical integral with the rotating shaft, the other end of the drive rod being mechanically coupled to a pinion rotatably mounted on the central box of a side of it and rotated by a chain of transmission.
  • the other end of the drive rod is coupled to the axis of rotation of the lateral pinion by a seal at Cardan.
  • the locking axis of a tie element corresponding crosses the hole defining the position raised access spout according to a clearance allowing to bring abutting the front support faces of the access spout and the central box when passing vehicles on the element of span.
  • the span structure also includes means for locking of the liftable access spout of the spans on a fixed access spout of another element of adjacent span to assemble the two together span elements and comprising, on each side of the spout liftable access, a horizontal connecting rod mounted on the pivot axis of the access spout which can be raised by through a ball joint and fixed to the central box through a stop elastic, a vertical connecting rod connected to the lifting spout via a spherical stop and the connecting rod horizontal via a socket allowing the passage of a transverse locking axis sliding door on one side of the fixed access spout of the other span element at the end of it, so that in the locked position of the raised access spout of the span element on the fixed access spout of the other span element, each spherical stop and each elastic stop absorbs lateral forces exerted on the span elements assembled during the launch of these elements above a breach and each vertical connecting rod takes up localized vertical forces at the end of the fixed access
  • the aforementioned spherical stop comprises a nut with spherical bearing screwed on the threaded end of the vertical rod and resting on a spherical surface conjugate of a base fixed on a support part integral with the aforementioned lifting spout, the upper part of the vertical connecting rod passing through the support part and the base.
  • the elastic stop is fixed between the central box and a radial tab integral with the horizontal connecting rod at its articulation at central box.
  • the means for controlling the movement of the two transverse axes of the fixed access spout of an element of span comprises a transverse shaft mounted at rotation in a box secured to the end of the spout fixed; two threaded rods respectively attached to two ends of the rotary shaft coaxial to it and on each of which is assembled a sleeve internally threaded constituting a transverse axis of locking; and a rotary drive means of the rotary shaft so as to move in translation in opposite directions the two sleeves from a position of unlocking to a locked position the end of the fixed access spout of and to the two sockets connecting the two horizontal and vertical connecting rods access spout raised.
  • the means for rotating the rotary shaft includes a drive rod through the spout fixed access and one end part of which is mounted at rotation in the rotary shaft support box and carries a bevel gear meshing with another gear conical integral with the rotating shaft, the other end of the drive rod being mechanically coupled to a pinion rotatably mounted on the fixed spout on one side of this one and driven in rotation by a chain of transmission.
  • the other end of the aforementioned drive rod is coupled to the axis of rotation of the lateral pinion by a attached to Cardan.
  • the end of the liftable access spout of the span is fixed to the fixed access spout of the other element of span by two parallel parts in the form of hook integral with the fixed access spout in the vicinity of edges of it and engaging respectively in two longitudinal notches made at the end of the spout liftable access.
  • the fixed access spout of the other span element includes two lateral angle stops integral with the end of the fixed access spout and now transversely the corresponding part of the access spout liftable by pressing on the fixed access spout.
  • the span structure includes two span elements with parallel upper tracks and whose central boxes are interconnected by two arms of link and the two access spouts forward or backward of the two span elements are respectively fixed and liftable.
  • Figure 1 is a schematic view showing a vehicle for removing a span over a breach and made up of several structural structures according to the invention.
  • Figure 2 is a detailed top view of an element span of a span structure of the invention.
  • Figure 3 is a sectional view along line III-III in Figure 2.
  • Figure 4 is a sectional view along line IV-IV in Figure 2.
  • Figure 5 is a side view showing partially two access spouts assembled one on the other respectively of two span elements different partially represented.
  • Figure 6 is an enlarged view of the part circled in VI of Figure 3.
  • Figure 7 is a partial view of a span element and showing the different force components applied to the end of the support element on the edge of a breach.
  • Figure 8 shows the force components applied to the two spouts of two elements respectively of different span assembled when launching these two structural elements above a breach such as shown in figure 1.
  • Figure 9 shows the passage of one vehicle over several buttresses assembled end-to-end deposited above a breach.
  • Figure 10 shows the applied force components with the two spouts respectively of two span elements different when passing the vehicle as shown in figure 9.
  • Figure 11 is an enlarged view with partial section means for locking a lifting spout of a span element to a fixed spout of another element of span.
  • Figure 12 is a sectional view along line XII-XII of figure 1.
  • Figure 13 is an enlarged view of the element part span indicated by arrow XIII in Figure 2.
  • Figure 14 is an enlarged view of the part circled in XIV of figure 2.
  • FIG. 15 is an enlarged view of the part circled in XV of figure 5.
  • Figure 16 is an enlarged view showing a stop transverse holding of the liftable spout of an element of span supported on a fixed spout adjacent to another element of span.
  • Figure 17 is a top view of the stop along the arrow XVII of figure 16.
  • FIG. 1 represents a road vehicle 1, such as a truck, arranged to transport at least one span 2 to near a breach 3 to place it above this one.
  • This figure shows that three spans 2 have have been coupled end-to-end by a removal system (not shown in detail) including launching beam 4 mounted on vehicle 1 and occupy a position called launch of these above the breach 3.
  • each span 2 includes two span elements identical parallels 5, only one of which is shown, linked together by link arms forming spacers 6 partially shown.
  • Each element span 5 includes a central rigid body or box 7 with upper track or raceway 8 and two spouts 9, 10 assembled respectively to the two ends of the central box 7 so as to extend the upper track of this box.
  • Beak access 10 is fixed while access spout 9 is fixed to the central box 7 opposite the fixed access spout 10 by a transverse articulation 11 allowing the spout 9 to occupy either a low position represented in particular in Figures 3 and 4 to which the bottom of the spout 9 is located in the same plane as the bottom of the central box 7, i.e.
  • each span 2 includes two pairs of rollers of bearing 13 fixed opposite the two side walls internal facing each other respectively two span elements 5. The rollers 13 allow the guiding the span 2 on the launching beam 4 during the procedure for removing the span or span mated together.
  • each spout lifting access 9 of a span is fixed to the fixed spout correspondent 10 on the other side by means of lock which will also be defined later.
  • the pivot axis 11 of the access spout liftable 9 of each span element 5 is located in lower part of the spout 9 approximately in the same plane as that passing through the bottom of the central box 7 and the locking means 12 of the access spout 9 to the central box 7 are located in the upper part of these.
  • the locking means 12 comprise two pairs of tie-forming elements 14 arranged in parallel and symmetrically to the longitudinal axis of the element of span 5, the two elements forming a 14 pair being mounted articulated on the access spout 9 by via a fixed transverse axis 15 of the spout 9 while the two pulling elements 14 of the other pair are also mounted articulated on the access spout 9 via another axis fixed transverse 15 integral with the spout 9 coaxially with previous axis of articulation 15.
  • the locking means 12 also include two transverse locking pins 16 sliding mounted in a controlled manner respectively in two bores coaxial (referenced 24 in Figure 13) of the box central 7 and allowing each to fix two elements forming tie rod 14 of the same pair with two positions different corresponding respectively to the positions low and raised from the access spout 9.
  • the two tie rod members 14 each include two separate holes 17, 18 defining the two positions low and raised from the access spout 9 when the axis of corresponding lock 16 is engaged in one or the other of the two holes 17, 18.
  • the spout 9 is fixed in the raised position and when the axis 16 locks these two elements forming tie 14 in passing through the other two coaxial holes 18, the spout 9 is fixed in the low position.
  • the control means allowing the movement of the two transverse locking pins 16 from their position locked in their unlocked position or conversely include, as shown more in detail in FIG. 13, a transverse shaft 19 mounted at rotation, by means of bearings 20, by example of the needle type, in an integral housing 21 of the central box 7; two threaded rods 22 integral respectively of the two ends of the rotary shaft 19 coaxial to it via a sleeve coupling 23 and on each of which is assembled an internally threaded sleeve 16 constituting an axis transverse locking.
  • Figure 13 shows the locking sleeve 16 of the same pair of elements forming tie rod 14 in retracted unlocking position of these.
  • This figure also shows two bores coaxial 24 made in parts of the central box 7 defining two yokes 25 in which engage respectively the two elements forming tie 14 of a same pair so as to be fixed to the central box 7 by the corresponding locking sleeve 16.
  • the shaft 19 can be rotated by a mechanical mechanism comprising a driving rod 26 passing through obliquely the central box 7 and part of which 26a end is rotatably mounted in the housing support 21 of the shaft 19 by means of two bearings 27, for example of the needle type, and door a bevel gear 28 meshing with another gear conical 29 integral with the rotary shaft 19 in the middle of this one, the other end 26b of the drive rod 26 being coupled to an axis 30, mounted for rotation at central box 7, via a seal on the Cardan type 31.
  • the rotary axis 30 carries a pinion 32 located on one side of the central box 7 outside of this one and on which is mounted a chain of transmission (not shown) driven at its end opposite the pinion 32 by another pinion (not shown) itself driven by a motor member, such as motor electric, for example integral with the central box 7 at bottom of it.
  • the upper locking means 12 are protected from external contamination, such as mud, by a transverse protection plate 33 mounted articulated at central box 7 by a transverse axis 34 extending over the entire width of this box and a joint rubber seal 35 which as it is better shown in Figure 6, is in the form of a folded strip having one end fixed under the protective plate 33 and its other end fixed to the upper part of the liftable spout 9 on which the sheet metal comes to bear protection 33.
  • the locking pins 16 of the elements forming drawing 14 cross the corresponding holes 17 with a clearance allowing the elements forming the tie 14 to not not be stressed by efforts when passing from vehicles on the road in service position as will see it later.
  • each element of span 5 also includes spout locking means lift access 9 on a fixed access spout 10 of another adjacent span element to form a span of longer length.
  • these locking means comprise a horizontal connecting rod 36 mounted on the pivot axis 11 of the access spout liftable 9 via a ball joint articulation 37 and fixed to the central box 7 by through an elastic stop 38 made of material elastomer mounted between the front wall 7a of the box central 7 and a radial tab 39 secured to the connecting rod horizontal 36 at its articulation to the box central 7.
  • the elastic stop 38 is fixed to the box central 7 and at lug 39 by a stud 40 crossing the stop 38 and lug 39 while being anchored in box 7.
  • the means for locking the liftable access spout 9 to fixed spout 10 also include a vertical connecting rod 41 connected to the lifting spout 9 via a stop spherical 42 which will be detailed and with a connecting rod horizontal 36 by means of a socket 43 allowing the passage of one correspondent of two axes sliding lock controlled transverse 44 arranged on both sides of the fixed access spout 10 on the other span element 5 at the end thereof.
  • the spherical stop 42 includes a nut 45 within reach spherical 46 screwed onto the threaded end 41a of the vertical connecting rod 41 and resting on a spherical surface conjugate 47 of a base 48 fixed on a part of support 49 integral with the structure of the liftable spout 9, the upper part of the vertical connecting rod 41 passing through the support part 49 and the base 48.
  • the base 48 is fixed to the support part 49 by fixing screws 50, of which only one is shown.
  • the spherical stop 42 can be protected from mud by an upper cover 51 fixed to the base 48 by any appropriate means, by example of the fixing screws, and a protective bellows rubber 52 surrounding the lower part of the vertical connecting rod 41 being suitably fixed and waterproof at the lower end of the vertical rod 41 and under the support part 49.
  • Figure 11 shows the liftable spout 9 in position lock raised before fixing on a fixed spout 10 another element of span 5 and, under these conditions, the horizontal link 36 and vertical link 41 assembly is kept in the correct position for presentation and locking the raised beak 9 to the fixed beak 10 on the other span element assembled by the elastic stop 38.
  • the means of movement control of the two transverse axes 44 of the fixed access spout 10 are similar to those allowing the displacement of the transverse locking axes 16 and thus comprise a transverse shaft 53 mounted at rotation in a housing 54 secured to the end of the fixed spout 10; two threaded rods 55 integral respectively of the two ends of the rotary shaft 53 coaxial to it via a sleeve coupling 56 and on each of which is assembled an internally threaded sleeve constituting an axis transverse locking 44; and a way for rotating the rotary shaft 53 so to move the two axes in translation in opposite directions 44 slidably mounted in their respective bores 10a fixed access spout 10 from an unlocking position to a locking position for the end of the spout fixed access 10 and two connecting sockets 43 of the two horizontal 36 and vertical 41 connecting rods of the spout adjacent raised access.
  • the two sockets 43 engage respectively in two longitudinal openings forming yoke 57 at the end of the fixed spout and of each side of it.
  • the rotary drive means of the rotary shaft 53 includes a through rod 58 obliquely the structure of the fixed access spout 10 and of which an end portion 58a is rotatably mounted in the support housing 54 of the shaft 53 by two bearings 59, for example of the needle type, and carries a pinion bevel 60 meshing with another bevel gear 61 integral with the rotary shaft 53, the other end 58b of the drive rod 58 being coupled by through a mating like at Cardan 62 at an axis 63 rotatably mounted on the fixed spout 10 on the side of this one facing the other element of span of the same span 2, the axis 63 carrying a lateral pinion 64 on which is mounted a transmission chain (not shown) driven opposite the pinion 64 by a motor pinion of a drive member, such as motor electric, integral with the fixed spout 10.
  • a through rod 58 obliquely the structure of the fixed access spout 10 and of which an end portion 58a is
  • Each fixed access spout 10 of a span element 5 includes two parallel hook-shaped parts pyramid 65 located on each side of the spout 10 to opposite the end of this beak. These parts forming hook 65 are oriented towards the end of the fixed spout 10 and are intended to engage respectively in two longitudinal notches 66 of a raised beak 9 of another span element 5 located at the end of the spout 9 of each side of it. So when assembling two spans, each hook-shaped part 65 of a fixed access spout 10 of a span engages in the notch corresponding 66 of the lifting spout 66 of the other span so as to link these two spans transversely.
  • the pyramid shape of the hook parts makes them slightly aggressive to vehicle wheels and allows these parts to be easily cleaned.
  • the transverse connection between spans is also ensured by two lateral stops at angle 67 fixed on the upper part of the fixed spout 10 by screws fixing 68 on each side of this spout somewhat in rear of the openings 57 for receiving the sockets 43.
  • FIG. 7 represents the lifting spout 9 of an element of span 5 of span 2 resting on the edge or bank of a breach 3 and locked in the low position by the upper locking means 12.
  • This figure shows that the components of forces exerted at this end part of span element 5 are such as the pulling elements 14 means of lock 12 work in compression as shown by the two arrows F1. Because the liftable spout 9 occupies its low position, each nut 45 within reach spherical 46 is disengaged from its support base corresponding 48 as clearly shown in Figure 7.
  • Figure 8 shows the situation where two span elements 5 of two different span are assembled together by the locking means comprising the horizontal 36 and vertical 41 connecting rods and the sockets 43 on both sides of the spout 9 locked in position taken up by the elements forming tie rod 14 and the locking pins 44 engaged respectively in the two sockets 43 with the two nozzles 9 and 10 linked transversely by the hook-shaped stops 65 and the lateral stops 67.
  • connecting rods are free to go up and therefore the end of the fixed spout 10 door under the raised beak 9 and the elastic stops 38 and spherical 42 allow lateral movement of the two connecting rods 36, 41 eliminating or limiting the lateral force transmission so these two connecting rods undergo only compression or traction, excluding bending forces, span being of course linked transversely by the stops 65 and 67.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cartons (AREA)
  • Bridges Or Land Bridges (AREA)
  • Body Structure For Vehicles (AREA)
  • Jib Cranes (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Description

La présente invention concerne une structure de travure destinée en particulier au franchissement de brèches par des véhicules, tels que des engins blindés du génie.The present invention relates to a span structure intended in particular for crossing breaches by vehicles, such as armored engineering vehicles.

Le document FR-A-2 683 837 au nom de la demanderesse décrit une structure de travure disposée sur un véhicule de transport de façon à être déposée seule ou en association avec une autre structure de travure identique au-dessus d'une brèche par un système de dépose approprié monté sur le véhicule de transport.Document FR-A-2 683 837 in the name of the applicant describes a span structure arranged on a vehicle transport so as to be deposited alone or in association with another identical span structure above a breach by an appropriate removal system mounted on the transport vehicle.

L'invention a pour but de perfectionner la structure de travure décrite dans le document ci-dessus en réalisant une structure de travure permettant de mieux supporter les efforts appliqués sur celle-ci ou sur un assemblage bout-à-bout de structures de travure lors de la phase de lancement de la structure de travure ou des structures de travure assemblées au-dessus de la brèche à franchir ou lors du passage de véhicules sur la structure de travure ou les structures de travure assemblées disposées au-dessus de la brèche.The invention aims to improve the structure of span described in the document above by realizing a span structure allowing better support the forces applied to it or to an assembly end-to-end of span structures during the phase of launching of the structure of span or structures of span assembled above the breach to be crossed or when vehicles pass over the span structure or the assembled span structures arranged above of the breach.

A cet effet, l'invention propose une structure de travure destinée en particulier au franchissement de brèches par des véhicules, tels que des engins blindés du génie, formée par au moins un élément de travure comprenant un caisson rigide central à chemin de roulement supérieur et deux becs d'accès assemblés respectivement aux deux extrémités du caisson central de façon à prolonger la voie de roulement du caisson central, l'un des becs d'accès étant fixé au caisson central d'une part par un axe de pivotement transversal et d'autre part par des moyens de verrouillage déverrouillables permettant au bec d'accès d'occuper une position basse d'appui sur un bord d'une brèche ou une position haute ou relevée d'accouplement à un bec d'accès d'un autre élément de travure, et qui est caractérisée en ce que les moyens de verrouillage comprennent au moins deux éléments formant tirant parallèles disposés symétriquement à l'axe longitudinal de l'élément de travure et articulés sur le bec d'accès par deux axes fixes transversaux ; et deux axes transversaux de verrouillage à déplacement commandé permettant de fixer respectivement les deux éléments formant tirant au caisson central à deux positions différentes correspondant respectivement aux positions basse et relevée du bec d'accès.To this end, the invention provides a structural structure intended in particular for crossing breaches by vehicles, such as armored engineering vehicles, formed by at least one span element comprising a central rigid box with upper raceway and two access spouts assembled respectively to the two ends of the central box so as to extend the track of the central box, one of the spouts of access being fixed to the central box on the one hand by a transverse pivot axis and on the other hand by unlockable locking means allowing the spout access to occupy a low support position on an edge a breach or a high or raised position coupling to an access spout of another element of span, and which is characterized in that the means of locking include at least two elements drawing parallels arranged symmetrically to the axis longitudinal of the span element and articulated on the access spout by two fixed transverse axes; And two transverse axes of locking with controlled displacement allowing to fix the two elements respectively forming a pull in the central box with two positions different corresponding respectively to the positions low and raised from the access spout.

De préférence, l'axe de pivotement du bec d'accès relevable précité est situé en partie inférieure de celui-ci et les moyens de verrouillage de ce bec sont situés en partie supérieure du bec et du caisson central.Preferably, the pivot axis of the access spout mentioned above is located in the lower part of this and the locking means of this spout are located in the upper part of the spout and the central box.

Les axes transversaux de verrouillage sont montés mobiles respectivement dans deux alésages du caisson central et peuvent être engagés chacun dans l'un de deux perçages de l'élément formant tirant correspondant définissant les deux positions basse et relevée du bec d'accès.The transverse locking pins are mounted movable respectively in two bores of the central box and can be engaged each in one of two holes of the corresponding pulling element defining the two low and raised positions of the access spout.

De préférence, les moyens de commande de déplacement des deux axes transversaux de verrouillage comprennent un arbre transversal monté à rotation dans un boítier solidaire du caisson central ; deux tiges filetées solidaires respectivement des deux extrémités de l'arbre rotatif coaxialement à celui-ci et sur chacune desquelles est assemblé un manchon intérieurement taraudé constituant un axe transversal de verrouillage ; et un moyen d'entraínement en rotation de l'arbre rotatif de façon à déplacer en translation en sens opposés les deux manchons d'une position de déverrouillage à une position de verrouillage des éléments formant tirant. Preferably, the means for controlling the movement of the two transverse locking pins include a transverse shaft rotatably mounted in a housing secured to the central box; two threaded rods secured respectively to the two ends of the shaft rotatable coaxially thereto and on each of which an internally threaded sleeve is assembled constituting a transverse locking axis; and one means for rotating the rotary shaft of so as to move in translation in opposite directions the two sleeves from an unlocking position to a position for locking the tie-forming elements.

Le moyen d'entraínement en rotation de l'arbre rotatif comprend une tige d'entraínement traversant le caisson central et dont une partie d'extrémité est montée à rotation dans le boítier de support de l'arbre rotatif et porte un pignon conique engrénant avec un autre pignon conique solidaire de l'arbre rotatif, l'autre extrémité de la tige d'entraínement étant accouplée mécaniquement à un pignon monté à rotation sur le caisson central d'un côté de celui-ci et entraíné en rotation par une chaíne de transmission.The means for rotating the rotary shaft includes a drive rod through the housing central and one end part of which is mounted at rotation in the support housing of the rotary shaft and carries a bevel gear meshing with another gear conical integral with the rotating shaft, the other end of the drive rod being mechanically coupled to a pinion rotatably mounted on the central box of a side of it and rotated by a chain of transmission.

L'autre extrémité de la tige d'entraínement est accouplée à l'axe de rotation du pignon latéral par un joint à Cardan.The other end of the drive rod is coupled to the axis of rotation of the lateral pinion by a seal at Cardan.

L'axe de verrouillage d'un élément formant tirant correspondant traverse le perçage définissant la position relevée du bec d'accès suivant un jeu permettant d'amener en aboutement les faces frontales d'appui du bec d'accès et du caisson central lors du passage de véhicules sur l'élément de travure.The locking axis of a tie element corresponding crosses the hole defining the position raised access spout according to a clearance allowing to bring abutting the front support faces of the access spout and the central box when passing vehicles on the element of span.

La structure de travure comprend également des moyens de verrouillage du bec d'accès relevable de l'élément de travure sur un bec d'accès fixe d'un autre élément de travure adjacent pour assembler ensemble les deux éléments de travure et comprenant, de chaque côté du bec d'accès relevable, une bielle horizontale montée sur l'axe de pivotement du bec d'accès relevable par l'intermédiaire d'une rotule d'articulation et fixée au caisson central par l'intermédiaire d'une butée élastique, une bielle verticale reliée au bec relevable par l'intermédiaire d'une butée sphérique et à la bielle horizontale par l'intermédiaire d'une douille permettant le passage d'un axe transversal de verrouillage coulissant commandé disposé d'un côté du bec d'accès fixe de l'autre élément de travure à l'extrémité de celui-ci, de sorte qu'en position verrouillée du bec d'accès relevé de l'élément de travure sur le bec d'accès fixe de l'autre élément de travure, chaque butée sphérique et chaque butée élastique absorbent les efforts latéraux exercés sur les éléments de travure assemblés lors du lancement de ces éléments au-desus d'une brèche et chaque bielle verticale reprend les efforts verticaux localisés à l'extrémité du bec d'accès fixe lors du passage de véhicules sur les éléments de travure assemblés.The span structure also includes means for locking of the liftable access spout of the spans on a fixed access spout of another element of adjacent span to assemble the two together span elements and comprising, on each side of the spout liftable access, a horizontal connecting rod mounted on the pivot axis of the access spout which can be raised by through a ball joint and fixed to the central box through a stop elastic, a vertical connecting rod connected to the lifting spout via a spherical stop and the connecting rod horizontal via a socket allowing the passage of a transverse locking axis sliding door on one side of the fixed access spout of the other span element at the end of it, so that in the locked position of the raised access spout of the span element on the fixed access spout of the other span element, each spherical stop and each elastic stop absorbs lateral forces exerted on the span elements assembled during the launch of these elements above a breach and each vertical connecting rod takes up localized vertical forces at the end of the fixed access spout when passing vehicles on the assembled span elements.

De préférence, la butée sphérique précitée comprend un écrou à portée sphérique vissé sur l'extrémité filetée de la bielle verticale et en appui sur une surface sphérique conjuguée d'une embase fixée sur une partie de support solidaire du bec relevable précité, la partie supérieure de la bielle verticale traversant la partie de support et l'embase.Preferably, the aforementioned spherical stop comprises a nut with spherical bearing screwed on the threaded end of the vertical rod and resting on a spherical surface conjugate of a base fixed on a support part integral with the aforementioned lifting spout, the upper part of the vertical connecting rod passing through the support part and the base.

De préférence, la butée élastique est fixée entre le caisson central et une patte radiale solidaire de la bielle horizontale au niveau de son articulation au caisson central.Preferably, the elastic stop is fixed between the central box and a radial tab integral with the horizontal connecting rod at its articulation at central box.

De préférence, les moyens de commande de déplacement des deux axes transversaux du bec d'accès fixe d'un élément de travure comprennent un arbre transversal monté à rotation dans un boítier solidaire de l'extrémité du bec fixe ; deux tiges filetées solidaires respectivement des deux extrémités de l'arbre rotatif coaxialement à celui-ci et sur chacune desquelles est assemblé un manchon intérieurement taraudé constituant un axe transversal de verrouillage ; et un moyen d'entraínement en rotation de l'arbre rotatif de façon à déplacer en translation en sens opposés les deux manchons d'une position de déverrouillage à une position de verrouillage de l'extrémité du bec d'accès fixe des et aux deux douilles de liaison des deux bielles horizontale et verticale d'un bec d'accès relevé.Preferably, the means for controlling the movement of the two transverse axes of the fixed access spout of an element of span comprises a transverse shaft mounted at rotation in a box secured to the end of the spout fixed; two threaded rods respectively attached to two ends of the rotary shaft coaxial to it and on each of which is assembled a sleeve internally threaded constituting a transverse axis of locking; and a rotary drive means of the rotary shaft so as to move in translation in opposite directions the two sleeves from a position of unlocking to a locked position the end of the fixed access spout of and to the two sockets connecting the two horizontal and vertical connecting rods access spout raised.

Le moyen d'entraínement en rotation de l'arbre rotatif comprend une tige d'entraínement traversant le bec d'accès fixe et dont une partie d'extrémité est montée à rotation dans le boíter de support de l'arbre rotatif et porte un pignon conique engrénant avec un autre pignon conique solidaire de l'arbre rotatif, l'autre extrémité de la tige d'entraínement étant accouplée mécaniquement à un pignon monté à rotation sur le bec fixe d'un côté de celui-ci et entraíné en rotation par une chaíne de transmission.The means for rotating the rotary shaft includes a drive rod through the spout fixed access and one end part of which is mounted at rotation in the rotary shaft support box and carries a bevel gear meshing with another gear conical integral with the rotating shaft, the other end of the drive rod being mechanically coupled to a pinion rotatably mounted on the fixed spout on one side of this one and driven in rotation by a chain of transmission.

L'autre extrémité de la tige d'entraínement précitée est accouplée à l'axe de rotation du pignon latéral par un joint à Cardan.The other end of the aforementioned drive rod is coupled to the axis of rotation of the lateral pinion by a attached to Cardan.

L'extrémité du bec d'accès relevable de l'élément de travure est fixée au bec d'accès fixe de l'autre élément de travure par deux parties parallèles en forme de crochet solidaires du bec d'accès fixe au voisinage des bords de celui-ci et s'engageant respectivement dans deux encoches longitudinales réalisées à l'extrémité du bec d'accès relevable.The end of the liftable access spout of the span is fixed to the fixed access spout of the other element of span by two parallel parts in the form of hook integral with the fixed access spout in the vicinity of edges of it and engaging respectively in two longitudinal notches made at the end of the spout liftable access.

Le bec d'accès fixe de l'autre élément de travure comprend deux butées latérales en équerre solidaires de l'extrémité du bec d'accès fixe et maintenant transversalement la partie correspondante du bec d'accès relevable en appui sur le bec d'accès fixe.The fixed access spout of the other span element includes two lateral angle stops integral with the end of the fixed access spout and now transversely the corresponding part of the access spout liftable by pressing on the fixed access spout.

La structure de travure comprend deux éléments de travure à chemins de roulement supérieurs parallèles et dont les caissons centraux sont reliés entre eux par deux bras de liaison et les deux becs d'accès en avant ou en arrière des deux éléments de travure sont respectivement fixe et relevable.The span structure includes two span elements with parallel upper tracks and whose central boxes are interconnected by two arms of link and the two access spouts forward or backward of the two span elements are respectively fixed and liftable.

L'invention sera mieux comprise et d'autres buts et avantages de celle-ci apparaítront plus clairement dans la description explicative qui va suivre faite en référence aux dessins schématiques annexés donnés uniquement à titre d'exemple illustrant un mode de réalisation de l'invention et dans lesquels :The invention will be better understood and other aims and advantages of it will appear more clearly in the description explanatory which will follow made with reference to the drawings attached diagrams given only by way of example illustrating an embodiment of the invention and in which :

La figure 1 est une vue schématique représentant un véhicule de dépose d'une travure au-dessus d'une brèche et constituée de plusieurs structures de travure conformes à l'invention.Figure 1 is a schematic view showing a vehicle for removing a span over a breach and made up of several structural structures according to the invention.

La figure 2 est une vue détaillée de dessus d'un élément de travure d'une structure de travure de l'invention.Figure 2 is a detailed top view of an element span of a span structure of the invention.

La figure 3 est une vue en coupe suivant la ligne III-III de la figure 2.Figure 3 is a sectional view along line III-III in Figure 2.

La figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 2.Figure 4 is a sectional view along line IV-IV in Figure 2.

La figure 5 est une vue de côté représentant partiellement deux becs d'accès assemblés l'un sur l'autre respectivement de deux éléments de travure différents représentés partiellement.Figure 5 is a side view showing partially two access spouts assembled one on the other respectively of two span elements different partially represented.

La figure 6 est une vue agrandie de la partie cerclée en VI de la figure 3.Figure 6 is an enlarged view of the part circled in VI of Figure 3.

La figure 7 est une vue partielle d'un élément de travure et montrant les différentes composantes de forces appliquées à l'extrémité de l'élément de travure en appui sur un bord d'une brèche.Figure 7 is a partial view of a span element and showing the different force components applied to the end of the support element on the edge of a breach.

La figure 8 représente les composantes de forces appliquées aux deux becs respectivement de deux éléments de travure assemblés différents lors du lancement de ces deux éléments de travure au-dessus d'une brèche comme représenté en figure 1.Figure 8 shows the force components applied to the two spouts of two elements respectively of different span assembled when launching these two structural elements above a breach such as shown in figure 1.

La figure 9 montre le passage d'un véhicule sur plusieurs travures assemblées bout-à-bout déposées au-dessus d'une brèche.Figure 9 shows the passage of one vehicle over several buttresses assembled end-to-end deposited above a breach.

La figure 10 montre les composantes de forces appliquées aux deux becs respectivement de deux éléments de travure différents lors du passage du véhicule comme représenté en figure 9.Figure 10 shows the applied force components with the two spouts respectively of two span elements different when passing the vehicle as shown in figure 9.

La figure 11 est une vue agrandie avec coupe partielle des moyens permettant le verrouillage d'un bec relevable d'un élément de travure à un bec fixe d'un autre élément de travure.Figure 11 is an enlarged view with partial section means for locking a lifting spout of a span element to a fixed spout of another element of span.

La figure 12 est une vue en coupe suivant la ligne XII-XII de la figure 1.Figure 12 is a sectional view along line XII-XII of figure 1.

La figure 13 est une vue agrandie de la partie d'élément de travure indiquée par la flèche XIII de la figure 2.Figure 13 is an enlarged view of the element part span indicated by arrow XIII in Figure 2.

La figure 14 est une vue agrandie de la partie cerclée en XIV de la figure 2.Figure 14 is an enlarged view of the part circled in XIV of figure 2.

La figure 15 est une vue agrandie de la partie cerclée en XV de la figure 5. FIG. 15 is an enlarged view of the part circled in XV of figure 5.

La figure 16 est une vue agrandie représentant une butée de maintien transversal du bec relevable d'un élément de travure en appui sur un bec fixe adjacent d'un autre élément de travure.Figure 16 is an enlarged view showing a stop transverse holding of the liftable spout of an element of span supported on a fixed spout adjacent to another element of span.

La figure 17 est une vue de dessus de la butée suivant la flèche XVII de la figure 16.Figure 17 is a top view of the stop along the arrow XVII of figure 16.

La figure 1 représente un véhicule routier 1, tel qu'un camion, agencé pour transporter au moins une travure 2 à proximité d'une brèche 3 pour la déposer au-dessus de celle-ci. Cette figure montre que trois travures 2 ont été accouplées bout-à-bout par un système de dépose (non représenté en détail) notamment à poutre de lancement 4 montée sur le véhicule 1 et occupent une position dite de lancement de celles-ci au-dessus de la brèche 3.FIG. 1 represents a road vehicle 1, such as a truck, arranged to transport at least one span 2 to near a breach 3 to place it above this one. This figure shows that three spans 2 have have been coupled end-to-end by a removal system (not shown in detail) including launching beam 4 mounted on vehicle 1 and occupy a position called launch of these above the breach 3.

Comme cela ressort en particulier des figures 2 à 11, chaque travure 2 comprend deux éléments de travure parallèles identiques 5, dont un seul est représenté, reliés ensemble par des bras de liaison formant entretoises 6 partiellement représentés. Chaque élément de travure 5 comprend un corps ou caisson rigide central 7 à voie ou chemin de roulement supérieur 8 et deux becs d'accès 9, 10 assemblés respectivement aux deux extrémités du caisson central 7 de façon à prolonger la voie de roulement supérieure de ce caisson. Le bec d'accès 10 est fixe tandis que le bec d'accès 9 est fixé au caisson central 7 à l'opposé du bec d'accès fixe 10 par une articulation transversale 11 permettant au bec 9 d'occuper soit une position basse représentée notamment aux figures 3 et 4 à laquelle le fond du bec 9 est situé dans le même plan que le fond du caisson central 7, soit une position haute ou relevée représentée en figure 5 à laquelle le fond incliné du bec 9 par rapport à celui du caisson central 7 peut être assemblé en appui sur la face supérieure adjacente du bec fixe 10 d'un autre élément de travure 5 dans le but de réaliser une travure de grande longueur par accouplement d'éléments de travure. Le bec relevable 9 d'un élément de travure est maintenu à l'une ou l'autre de ses positions basse et relevée par des moyens de verrouillage 12 qui seront décrits ultérieurement.As is shown in particular in FIGS. 2 to 11, each span 2 includes two span elements identical parallels 5, only one of which is shown, linked together by link arms forming spacers 6 partially shown. Each element span 5 includes a central rigid body or box 7 with upper track or raceway 8 and two spouts 9, 10 assembled respectively to the two ends of the central box 7 so as to extend the upper track of this box. Beak access 10 is fixed while access spout 9 is fixed to the central box 7 opposite the fixed access spout 10 by a transverse articulation 11 allowing the spout 9 to occupy either a low position represented in particular in Figures 3 and 4 to which the bottom of the spout 9 is located in the same plane as the bottom of the central box 7, i.e. a raised or raised position shown in Figure 5 to which the inclined bottom of the spout 9 relative to that of the central box 7 can be assembled resting on the face adjacent top of the fixed spout 10 of another element of span 5 in order to achieve a large span length by coupling of span elements. Beak liftable 9 of a span element is held at one either of its low positions and raised by locking means 12 which will be described later.

Les deux éléments 5 d'une travure 2 sont assemblés par leurs bras de liaison 6 de telle façon que la travure 2 puisse disposer à chacune de ses extrémités de deux becs d'accès respectivement relevable 9 et fixe 10 de sorte qu'il n'y ait aucune imposition pour le sens de présentation des travures lors de leur accouplement. De plus, chaque travure 2 comprend deux paires de galets de roulement 13 fixés en vis-à-vis aux deux parois latérales internes en regard l'une de l'autre respectivement de deux éléments de travure 5. Les galets 13 permettent le guidage de la travure 2 sur la poutre de lancement 4 lors de la procédure de dépose de la travure ou de travures accouplées ensemble.The two elements 5 of a span 2 are assembled by their link arms 6 so that the span 2 can have two spouts at each of its ends liftable access 9 and fixed access 10 respectively that there is no taxation for the meaning of presentation of the spans during their coupling. Of more, each span 2 includes two pairs of rollers of bearing 13 fixed opposite the two side walls internal facing each other respectively two span elements 5. The rollers 13 allow the guiding the span 2 on the launching beam 4 during the procedure for removing the span or span mated together.

Pour accoupler bout-à-bout deux travures 2, chaque bec d'accès relevable 9 d'une travure est fixé au bec fixe correspondant 10 de l'autre travure par des moyens de verrouillage qui seront également définis ultérieurement.To couple two spans 2 end to end, each spout lifting access 9 of a span is fixed to the fixed spout correspondent 10 on the other side by means of lock which will also be defined later.

Selon l'invention, l'axe de pivotement 11 du bec d'accès relevable 9 de chaque élément de travure 5 est situé en partie inférieure du bec 9 approximativement dans le même plan que celui passant par le fond du caisson central 7 et les moyens de verrouillage 12 du bec d'accès 9 au caisson central 7 sont situés en partie supérieure de ceux-ci.According to the invention, the pivot axis 11 of the access spout liftable 9 of each span element 5 is located in lower part of the spout 9 approximately in the same plane as that passing through the bottom of the central box 7 and the locking means 12 of the access spout 9 to the central box 7 are located in the upper part of these.

Les moyens de verrouillage 12 comprennent deux paires d'éléments formant tirant 14 disposées parallèlement et symétriquement à l'axe longitudinal de l'élément de travure 5, les deux éléments formant tirant 14 d'une paire étant montés articulés sur le bec d'accès 9 par l'intermédiaire d'un axe transversal fixe 15 solidiaire du bec 9 tandis que les deux éléments formant tirant 14 de l'autre paire sont également montés articulés sur le bec d'accès 9 par l'intermédiaire d'un autre axe transversal fixe 15 solidaire du bec 9 coaxialement au précédent axe d'articulation 15.The locking means 12 comprise two pairs of tie-forming elements 14 arranged in parallel and symmetrically to the longitudinal axis of the element of span 5, the two elements forming a 14 pair being mounted articulated on the access spout 9 by via a fixed transverse axis 15 of the spout 9 while the two pulling elements 14 of the other pair are also mounted articulated on the access spout 9 via another axis fixed transverse 15 integral with the spout 9 coaxially with previous axis of articulation 15.

Les moyens de verrouillage 12 comprennent également deux axes transversaux de verrouillage 16 montés coulissants de façon commandée respectivement dans deux alésages coaxiaux (référencés en 24 à la figure 13) du caisson central 7 et permettant chacun de fixer deux éléments formant tirant 14 d'une même paire à deux positions différentes correspondant respectivement aux positions basse et relevée du bec d'accès 9. A cet effet, les deux éléments formant tirant 14 comprennent chacun deux perçages distincts 17, 18 définissant les deux positions basse et relevée du bec d'accès 9 lorsque l'axe de verrouillage correspondant 16 est engagé dans l'un ou l'autre des deux perçages 17, 18. Ainsi, lorsque l'axe 16 verrouille les deux éléments formant tirant 14 d'une même paire en traversant les deux perçages coaxiaux 17, le bec 9 est fixé en position relevée et lorsque l'axe 16 verrouille ces deux éléments formant tirant 14 en traversant les deux autres perçages coaxiaux 18, le bec 9 est fixé en position basse. The locking means 12 also include two transverse locking pins 16 sliding mounted in a controlled manner respectively in two bores coaxial (referenced 24 in Figure 13) of the box central 7 and allowing each to fix two elements forming tie rod 14 of the same pair with two positions different corresponding respectively to the positions low and raised from the access spout 9. For this purpose, the two tie rod members 14 each include two separate holes 17, 18 defining the two positions low and raised from the access spout 9 when the axis of corresponding lock 16 is engaged in one or the other of the two holes 17, 18. Thus, when the axis 16 locks the two elements forming tie 14 of the same pair crossing the two coaxial holes 17, the spout 9 is fixed in the raised position and when the axis 16 locks these two elements forming tie 14 in passing through the other two coaxial holes 18, the spout 9 is fixed in the low position.

Les moyens de commande permettant le déplacement des deux axes transversaux de verrouillage 16 de leur position de verrouillage à leur position de déverrouillage ou réciproquement comprennent, comme représenté plus en détail à la figure 13, un arbre transversal 19 monté à rotation, par l'intermédiaire de roulements 20, par exemple du type à aiguilles, dans un boítier 21 solidaire du caisson central 7 ; deux tiges filetées 22 solidaires respectivement des deux extrémités de l'arbre rotatif 19 coaxialement à celui-ci par l'intermédiaire d'un manchon d'accouplement 23 et sur chacune desquelles est assemblé un manchon intérieurement taraudé 16 constituant un axe transversal de verrouillage. La figure 13 montre le manchon de verrouillage 16 d'une même paire d'éléments formant tirant 14 en position rétractée de déverrouillage de ceux-ci. Cette figure montre également deux alésages coaxiaux 24 réalisés dans des parties du caisson central 7 définissant deux chapes 25 dans lesquelles s'engagent respectivement les deux éléments formant tirant 14 d'une même paire de façon à être fixés au caisson central 7 par le manchon de verrouillage correspondant 16. L'arbre 19 peut être entraíné en rotation par un mécanisme mécanique comprenant une tige d'entraínement 26 traversant obliquement le caisson central 7 et dont une partie d'extrémité 26a est montée à rotation dans le boítier de support 21 de l'arbre 19 par l'intermédiaire de deux roulements 27, par exemple du type à aigulles, et porte un pignon conique 28 engrénant avec un autre pignon conique 29 solidaire de l'arbre rotatif 19 au milieu de celui-ci, l'autre extrémité 26b de la tige d'entraínement 26 étant accouplée à un axe 30, monté à rotation au caisson central 7, par l'intermédiaire d'un joint du genre à Cardan 31. L'axe rotatif 30 porte un pignon 32 situé d'un côté du caisson central 7 à l'extérieur de celui-ci et sur lequel est montée une chaíne de transmission (non représentée) entraínée à son extrémité opposée au pignon 32 par un autre pignon (non représenté) lui-même entraíné par un organe moteur, tel que moteur électrique, par exemple solidaire du caisson central 7 au fond de celui-ci.The control means allowing the movement of the two transverse locking pins 16 from their position locked in their unlocked position or conversely include, as shown more in detail in FIG. 13, a transverse shaft 19 mounted at rotation, by means of bearings 20, by example of the needle type, in an integral housing 21 of the central box 7; two threaded rods 22 integral respectively of the two ends of the rotary shaft 19 coaxial to it via a sleeve coupling 23 and on each of which is assembled an internally threaded sleeve 16 constituting an axis transverse locking. Figure 13 shows the locking sleeve 16 of the same pair of elements forming tie rod 14 in retracted unlocking position of these. This figure also shows two bores coaxial 24 made in parts of the central box 7 defining two yokes 25 in which engage respectively the two elements forming tie 14 of a same pair so as to be fixed to the central box 7 by the corresponding locking sleeve 16. The shaft 19 can be rotated by a mechanical mechanism comprising a driving rod 26 passing through obliquely the central box 7 and part of which 26a end is rotatably mounted in the housing support 21 of the shaft 19 by means of two bearings 27, for example of the needle type, and door a bevel gear 28 meshing with another gear conical 29 integral with the rotary shaft 19 in the middle of this one, the other end 26b of the drive rod 26 being coupled to an axis 30, mounted for rotation at central box 7, via a seal on the Cardan type 31. The rotary axis 30 carries a pinion 32 located on one side of the central box 7 outside of this one and on which is mounted a chain of transmission (not shown) driven at its end opposite the pinion 32 by another pinion (not shown) itself driven by a motor member, such as motor electric, for example integral with the central box 7 at bottom of it.

Les moyens de verrouillage supérieurs 12 sont protégés de souillures extérieures, telles que de la boue, par une tôle transversale de protection 33 montée articulée au caisson central 7 par un axe transversal 34 s'étendant sur toute la largeur de ce caisson et un joint d'étanchéité en caoutchouc 35 qui, comme cela est mieux représenté en figure 6, est en forme de bande repliée ayant une extrémité fixée sous la tôle de protection 33 et son autre extrémité fixée à la partie supérieure du bec relevable 9 sur laquelle vient en appui la tôle de protection 33.The upper locking means 12 are protected from external contamination, such as mud, by a transverse protection plate 33 mounted articulated at central box 7 by a transverse axis 34 extending over the entire width of this box and a joint rubber seal 35 which as it is better shown in Figure 6, is in the form of a folded strip having one end fixed under the protective plate 33 and its other end fixed to the upper part of the liftable spout 9 on which the sheet metal comes to bear protection 33.

Enfin, les axes de verrouillage 16 des éléments formant tirant 14 traversent les perçages correspondant 17 avec un jeu permettant aux éléments formant tirant 14 de ne pas être sollicités par des efforts lors du passage de véhicules sur la travure en position de service comme on le verra ultérieurement.Finally, the locking pins 16 of the elements forming drawing 14 cross the corresponding holes 17 with a clearance allowing the elements forming the tie 14 to not not be stressed by efforts when passing from vehicles on the road in service position as will see it later.

Comme mentionné précédemment, chaque élément de travure 5 comprend également des moyens de verrouillage du bec d'accès relevable 9 sur un bec d'accès fixe 10 d'un autre élément de travure adjacent pour former une travure de plus grande longueur.As mentioned before, each element of span 5 also includes spout locking means lift access 9 on a fixed access spout 10 of another adjacent span element to form a span of longer length.

Comme cela est mieux représenté aux figures 11 et 12, ces moyens de verrouillage comprennent une bielle horizontale 36 montée sur l'axe de pivotement 11 du bec d'accès relevable 9 par l'intermédiaire d'une rotule d'articulation 37 et fixée au caisson central 7 par l'intermédiaire d'une butée élastique 38 en matériau élastomère montée entre la paroi frontale 7a du caisson central 7 et une patte radiale 39 solidaire de la bielle horizontale 36 au niveau de son articulation au caisson central 7. La butée élastique 38 est fixée au caisson central 7 et à la patte 39 par un goujon 40 traversant la butée 38 et la patte 39 en étant ancré dans le caisson 7. Les moyens de verrouillage du bec d'accès relevable 9 au bec fixe 10 comprennent également une bielle verticale 41 reliée au bec relevable 9 par l'intermédiaire d'une butée sphérique 42 qui va être détaillée et à la bielle horizontale 36 par l'intermédiaire d'une douille 43 permettant le passage de l'un correspondant de deux axes transversaux de verrouillage coulissant commandés 44 disposés aux deux côtés du bec d'accès fixe 10 de l'autre élément de travure 5 à l'extrémité de celui-ci.As best shown in Figures 11 and 12, these locking means comprise a horizontal connecting rod 36 mounted on the pivot axis 11 of the access spout liftable 9 via a ball joint articulation 37 and fixed to the central box 7 by through an elastic stop 38 made of material elastomer mounted between the front wall 7a of the box central 7 and a radial tab 39 secured to the connecting rod horizontal 36 at its articulation to the box central 7. The elastic stop 38 is fixed to the box central 7 and at lug 39 by a stud 40 crossing the stop 38 and lug 39 while being anchored in box 7. The means for locking the liftable access spout 9 to fixed spout 10 also include a vertical connecting rod 41 connected to the lifting spout 9 via a stop spherical 42 which will be detailed and with a connecting rod horizontal 36 by means of a socket 43 allowing the passage of one correspondent of two axes sliding lock controlled transverse 44 arranged on both sides of the fixed access spout 10 on the other span element 5 at the end thereof.

La butée sphérique 42 comprend un écrou 45 à portée sphérique 46 vissé sur l'extrémité filetée 41a de la bielle verticale 41 et en appui sur une surface sphérique conjuguée 47 d'une embase 48 fixée sur une partie de support 49 solidaire de la structure du bec relevable 9, la partie supérieure de la bielle verticale 41 traversant la partie de support 49 et l'embase 48. L'embase 48 est fixée à la partie de support 49 par des vis de fixation 50, dont une seule est représentée. La butée sphérique 42 peut être protégée de la boue par un capot supérieur 51 fixé sur l'embase 48 par tout moyen approprié, par exemple des vis de fixation, et un soufflet de protection en caoutchouc 52 entourant la partie inférieure de la bielle verticale 41 en étant fixé de façon appropriée et étanche à l'extrémité inférieure de la bielle verticale 41 et sous la partie de support 49.The spherical stop 42 includes a nut 45 within reach spherical 46 screwed onto the threaded end 41a of the vertical connecting rod 41 and resting on a spherical surface conjugate 47 of a base 48 fixed on a part of support 49 integral with the structure of the liftable spout 9, the upper part of the vertical connecting rod 41 passing through the support part 49 and the base 48. The base 48 is fixed to the support part 49 by fixing screws 50, of which only one is shown. The spherical stop 42 can be protected from mud by an upper cover 51 fixed to the base 48 by any appropriate means, by example of the fixing screws, and a protective bellows rubber 52 surrounding the lower part of the vertical connecting rod 41 being suitably fixed and waterproof at the lower end of the vertical rod 41 and under the support part 49.

La figure 11 montre le bec relevable 9 en position de verrouillage relevée avant fixation sur un bec fixe 10 d'un autre élément de travure 5 et, dans ces conditions, l'ensemble bielle horizontale 36 et bielle verticale 41 est maintenu en position correcte de présentation et de verrouillage du bec relevé 9 au bec fixe 10 de l'autre élément de travure assemblé par la butée élastique 38.Figure 11 shows the liftable spout 9 in position lock raised before fixing on a fixed spout 10 another element of span 5 and, under these conditions, the horizontal link 36 and vertical link 41 assembly is kept in the correct position for presentation and locking the raised beak 9 to the fixed beak 10 on the other span element assembled by the elastic stop 38.

Comme représenté aux figures 2 et 14, les moyens de commande de déplacement des deux axes transversaux 44 du bec d'accès fixe 10 sont semblables à ceux permettant le déplacement des axes transversaux de verrouillage 16 et comprennent ainsi un arbre transversal 53 monté à rotation dans un boítier 54 solidaire de l'extrémité du bec fixe 10 ; deux tiges filetées 55 solidaires respectivement des deux extrémités de l'arbre rotatif 53 coaxialement à celui-ci par l'intermédiaire d'un manchon d'accouplement 56 et sur chacune desquelles est assemblé un manchon intérieurement taraudé constituant un axe transversal de verrouillage 44 ; et un moyen d'entraínement en rotation de l'arbre rotatif 53 de façon à déplacer en translation en sens opposés les deux axes 44 montés coulissant dans leurs alésages respectifs 10a du bec d'accès fixe 10 d'une position de déverrouillage à une position de verrouillage de l'extrémité du bec d'accès fixe 10 des et aux deux douilles 43 de liaison des deux bielles horizontales 36 et verticales 41 du bec d'accès relevé adjacent. Lorsque le bec relevé 9 d'un élément de travure 5 est correctement présenté sur le bec fixe 10 d'un autre élément de travure 5 pour leur assemblage, les deux douilles 43 s'engagent respectivement dans deux ouvertures longitudinales formant chape 57 à l'extrémité du bec fixe et de chaque côté de celui-ci.As shown in Figures 2 and 14, the means of movement control of the two transverse axes 44 of the fixed access spout 10 are similar to those allowing the displacement of the transverse locking axes 16 and thus comprise a transverse shaft 53 mounted at rotation in a housing 54 secured to the end of the fixed spout 10; two threaded rods 55 integral respectively of the two ends of the rotary shaft 53 coaxial to it via a sleeve coupling 56 and on each of which is assembled an internally threaded sleeve constituting an axis transverse locking 44; and a way for rotating the rotary shaft 53 so to move the two axes in translation in opposite directions 44 slidably mounted in their respective bores 10a fixed access spout 10 from an unlocking position to a locking position for the end of the spout fixed access 10 and two connecting sockets 43 of the two horizontal 36 and vertical 41 connecting rods of the spout adjacent raised access. When the raised beak 9 of a span element 5 is correctly presented on the spout fixed 10 of another span element 5 for their assembly, the two sockets 43 engage respectively in two longitudinal openings forming yoke 57 at the end of the fixed spout and of each side of it.

Le moyen d'entraínement en rotation de l'arbre rotatif 53 comprend une tige d'entraínement 58 traversant obliquement la structure du bec d'accès fixe 10 et dont une partie d'extrémité 58a est montée à rotation dans le boítier de support 54 de l'arbre 53 par deux roulements 59, par exemple du type à aiguilles, et porte un pignon conique 60 engrénant avec un autre pignon conique 61 solidaire de l'arbre rotatif 53, l'autre extrémité 58b de la tige d'entraínement 58 étant accouplée par l'intermédiaire d'un accouplement du genre à Cardan 62 à un axe 63 monté à rotation sur le bec fixe 10 du côté de celui-ci en faisant face à l'autre élément de travure de la même travure 2, l'axe 63 portant un pignon latéral 64 sur lequel est montée une chaíne de transmission (non représentée) entraínée à l'opposé du pignon 64 par un pignon moteur d'un organe d'entraínement, tel que moteur électrique, solidaire du bec fixe 10.The rotary drive means of the rotary shaft 53 includes a through rod 58 obliquely the structure of the fixed access spout 10 and of which an end portion 58a is rotatably mounted in the support housing 54 of the shaft 53 by two bearings 59, for example of the needle type, and carries a pinion bevel 60 meshing with another bevel gear 61 integral with the rotary shaft 53, the other end 58b of the drive rod 58 being coupled by through a mating like at Cardan 62 at an axis 63 rotatably mounted on the fixed spout 10 on the side of this one facing the other element of span of the same span 2, the axis 63 carrying a lateral pinion 64 on which is mounted a transmission chain (not shown) driven opposite the pinion 64 by a motor pinion of a drive member, such as motor electric, integral with the fixed spout 10.

Chaque bec d'accès fixe 10 d'un élément de travure 5 comprend deux parties parallèles formant crochet en forme de pyramide 65 situées de chaque côté du bec 10 à l'opposé de l'extrémité de ce bec. Ces parties formant crochet 65 sont orientées vers l'extrémité du bec fixe 10 et sont destinées à s'engager respectivement dans deux encoches longitudinales 66 d'un bec relevé 9 d'un autre élément de travure 5 situé à l'extrémité du bec 9 de chaque côté de celui-ci. Ainsi, lors de l'assemblage de deux travures, chaque partie en forme de crochet 65 d'un bec d'accès fixe 10 d'une travure s'engage dans l'encoche correspondante 66 du bec relevable 66 de l'autre travure de façon à lier transversalement ces deux travures. La forme en pyramide des parties formant crochet les rend peu agressives aux roues des véhicules et permet à ces parties d'être facilement nettoyées.Each fixed access spout 10 of a span element 5 includes two parallel hook-shaped parts pyramid 65 located on each side of the spout 10 to opposite the end of this beak. These parts forming hook 65 are oriented towards the end of the fixed spout 10 and are intended to engage respectively in two longitudinal notches 66 of a raised beak 9 of another span element 5 located at the end of the spout 9 of each side of it. So when assembling two spans, each hook-shaped part 65 of a fixed access spout 10 of a span engages in the notch corresponding 66 of the lifting spout 66 of the other span so as to link these two spans transversely. The pyramid shape of the hook parts makes them slightly aggressive to vehicle wheels and allows these parts to be easily cleaned.

La liaison transversale entre travures est également assurée par deux butées latérales en équerre 67 fixées sur la partie supérieure du bec fixe 10 par des vis de fixation 68 de chaque côté de ce bec quelque peu en arrière des ouverutres 57 de réception des douilles 43. The transverse connection between spans is also ensured by two lateral stops at angle 67 fixed on the upper part of the fixed spout 10 by screws fixing 68 on each side of this spout somewhat in rear of the openings 57 for receiving the sockets 43.

En position assemblée des travures, les deux bords correspondants d'un bec relevé 9 viennent en appui respectivement sur les deux parois droites latérales 67a de la butée 67 pour maintenir ainsi transversalement le bec d'accès relevé 9.In the assembled position of the spans, the two edges correspondents of a raised beak 9 come to bear respectively on the two straight side walls 67a of the stop 67 to thus maintain transversely the raised access spout 9.

La figure 7 représente le bec relevable 9 d'un élément de travure 5 d'une travure 2 en appui sur le bord ou la berge d'une brèche 3 et verrouillé en position basse par les moyens de verrouillage supérieurs 12. Cette figure montre que les composantes de forces qui s'exercent à cette partie d'extrémité d'élément de travure 5 sont telles que les éléments formant tirant 14 des moyens de verrouillage 12 travaillent en compression comme indiqué par les deux flèches F1. Du fait que le bec relevable 9 occupe sa position basse, chaque écrou 45 à portée sphérique 46 est désengagé de son embase de support correspondante 48 comme le montre clairement la figure 7.FIG. 7 represents the lifting spout 9 of an element of span 5 of span 2 resting on the edge or bank of a breach 3 and locked in the low position by the upper locking means 12. This figure shows that the components of forces exerted at this end part of span element 5 are such as the pulling elements 14 means of lock 12 work in compression as shown by the two arrows F1. Because the liftable spout 9 occupies its low position, each nut 45 within reach spherical 46 is disengaged from its support base corresponding 48 as clearly shown in Figure 7.

La figure 8 représente la situation selon laquelle deux éléments de travure 5 de deux travures différentes sont assemblés ensemble par les moyens de verrouillage comprenant les bielles horizontales 36 et verticales 41 et les douilles 43 des deux côtés du bec 9 verrouillé en position relevée par les éléments formant tirant 14 et les axes de verrouillage 44 engagés respectivement dans les deux douilles 43 avec les deux becs 9 et 10 liés transversalement par les butées en forme de crochet 65 et les butées latérales 67. Lors du lancement des deux travures 2 ainsi assemblées par le véhicule 1 comme représenté en figure 1, les éléments formant tirant 14 travaillent en traction comme indiqué par les deux flèches F2 et le moment fléchissant créé par le poids propre de chaque travure est repris de part et d'autre de chaque élément de travure 5 par des efforts verticaux F3 et F4 respectivement en extrémité du bec fixe 10 (appui linéaire) et en extrémité du bec relevable 9 (butées 65). Dans cette situation, les bielles horizontales 36 et verticales 41 et les douilles 43 n'assurent que la liaison dans le sens horizontal entre les deux travures 2 à l'exclusion de tout autre effort. Ces bielles sont libres de remonter et de ce fait l'extrémité du bec fixe 10 porte sous le bec relevé 9 et les butées élastiques 38 et sphériques 42 autorisent un débattement latéral des deux bielles 36, 41 supprimant ou limitant la transmission d'efforts latéraux de sorte que ces deux bielles ne subissent que des efforts de compression ou de traction, à l'exclusion d'efforts de flexion, la travure étant bien entendu liée transversalement par les butées 65 et 67.Figure 8 shows the situation where two span elements 5 of two different span are assembled together by the locking means comprising the horizontal 36 and vertical 41 connecting rods and the sockets 43 on both sides of the spout 9 locked in position taken up by the elements forming tie rod 14 and the locking pins 44 engaged respectively in the two sockets 43 with the two nozzles 9 and 10 linked transversely by the hook-shaped stops 65 and the lateral stops 67. When launching the two spans 2 thus assembled by vehicle 1 as shown in Figure 1, the drawing elements 14 work in traction as indicated by the two arrows F2 and the bending moment created by the weight clean of each span is taken up on both sides of each element of span 5 by vertical forces F3 and F4 respectively at the end of the fixed spout 10 (support linear) and at the end of the liftable spout 9 (stops 65). In this situation, the horizontal connecting rods 36 and vertical 41 and sockets 43 only provide the connection in the horizontal direction between the two spans 2 to the exclusion of all other efforts. These connecting rods are free to go up and therefore the end of the fixed spout 10 door under the raised beak 9 and the elastic stops 38 and spherical 42 allow lateral movement of the two connecting rods 36, 41 eliminating or limiting the lateral force transmission so these two connecting rods undergo only compression or traction, excluding bending forces, span being of course linked transversely by the stops 65 and 67.

Lors du passage de véhicules sur au moins deux travures assemblées 2 comme représenté en figure 9, les moyens de verrouillage supérieurs ne sont plus sollicités grâce au jeu entre perçages 17 et axes de verrouillage transversaux 16 des moyens de verrouillage 12 et les efforts de compression passent directement du bec relevé 9 au caisson central 7 par l'intermédiaire des faces frontales d'appui respectivement du bec relevé 9 et du caisson central 7 comme représenté en figure 10. Cette figure montre également que le moment fléchissant créé lors du passage des véhicules se décompose en efforts verticaux F5 et F6 localisés respectivement à l'extrémité du bec relevé 9 en appui linéaire sur le bec fixe 10 et l'extrémité du bec fixe 10 repris par les bielles verticales 41.When vehicles pass over at least two spans assemblies 2 as shown in FIG. 9, the means of locks are no longer required thanks to the clearance between holes 17 and locking pins transverse 16 of the locking means 12 and the compression forces pass directly from the raised beak 9 to the central box 7 via the faces front support respectively of the raised beak 9 and of the central box 7 as shown in Figure 10. This figure also shows that the bending moment created during the passage of vehicles breaks down into efforts vertical F5 and F6 located respectively at the end of the raised beak 9 in linear support on the fixed beak 10 and the end of the fixed spout 10 taken up by the connecting rods vertical 41.

Les avantages essentiels des moyens de verrouillage ci-dessus décrits de l'invention résident dans la réduction des efforts aux zones d'interface entre éléments de travure 5 et la réduction des efforts sur la charnière d'articulation 11 d'un bec relevable 9 au caisson central 7.The essential advantages of the above locking means described of the invention lie in the reduction efforts at the interface zones between elements of span 5 and the reduction of forces on the hinge hinge 11 with a lifting spout 9 at the central box 7.

Claims (16)

  1. Bridge element especially designed for surmounting gaps (3) by vehicles, such as military engineering armoured machines, formed by at least one bridge member (5) comprising a central rigid box (7) with an upper rolling path (8) and two access noses (9 ; 10) assembled respectively to the two ends of the central box (7) in order to extend the rolling path (8) of the central box (7), one (9) of the access noses being fixed to the central box (7), on the one hand, by means of a transverse pivoting pin (11) and, on the other hand, by means of releasable locking means (12) enabling the access nose (9) to occupy a lower position that bears on an edge of a gap (3) or a higher or raised position for coupling with an access nose (10) of another bridge member (5), characterized in that the locking means (12) comprise at least two parallel tie-bolt forming members (14) arranged symmetrically to the longitudinal axis of the bridge member (5) and articulated onto the access nose (9) by means of two transverse fixed pins (15) ; and two locking transverse pins (16) having a controlled movement enabling to respectively fix the two tie-bolts forming members (14) to the central box (7) at two different positions respectively corresponding to the lower and raised positions of the access nose (9).
  2. Bridge element according to claim 1, characterized in that the pivoting pin (11) of said access nose (9) is situated at the lower part thereof and the locking means (12) of the access nose (9) are situated at the upper part of the access nose (9) and central box (16).
  3. Bridge element according to claim 1 or 2, characterized in that said locking transverse pins (16) are movably mounted respectively in two bores (24) of the central box (7) and can be engaged each one in one of two orifices (17, 18) of the corresponding tie-rod forming member (14) that defines the two lower and raised positions of the access nose (9).
  4. Bridge element according to one of the preceding claims, characterized in that the means for controlling the movement of the two locking transverse pins (16) comprise a transverse shaft (19) rotatably mounted in a casing (21) that is rigidly connected to the central box (7) ; two threaded rods (22) that are rigidly connected respectively to the two ends of the rotary shaft (19) coaxially thereto and on each one of which a sleeve is assembled that is innerly tapped for forming a locking transverse pin (16) ; and a means for rotatably driving the rotary shaft (19) so as to translatively move in opposite directions the two sleeves (16) from a released position to a locked position of the tie-bolt forming members (14).
  5. Bridge element according to claim 4, characterized in that the means for rotatably driving the rotary shaft (19) comprises a driving rod (26) that passes through the central box (7), and the end part (26a) of which is rotatably mounted in the support casing (21) of the rotary shaft (19) and carries a conical pinion (28) in gearing engagement with another conical pinion (29) rigidly connected with the rotary shaft (19), the other end (26b) of the driving rod (26) being mechanically coupled with a pinion (32) that is rotatably mounted onto the central box (7) on one side thereof and driven by means of a transmission chain.
  6. Bridge element according to claim 5, characterized in that the other end (26b) of the driving rod (26) is coupled to the rotation pin (30) of the lateral pinion (32) by means of a cardan joint (31).
  7. Bridge element according to one of claims 3 to 6, characterized in that the locking pin (16) of a corresponding tie-bolt forming member (14) passes through the orifice (17) that defines the raised position of the access nose (9) according to a clearance enabling to bring into abutment the bearing front faces of the access nose (9) and central box (7) upon passage of vehicles on the bridge member (5).
  8. Bridge element according to one of the preceding claims, characterized in that it also comprises means for locking the raisable access nozzle (9) of the bridge member (5) on a fixed access nose (10) of another adjacent bridge member (5) for assembling together the two bridge members and comprising, on each side of the raisable access nozzle (9), a horizontal connecting rod (36) that is mounted onto the pivoting pin (11) of the raisable access nose (9) by means of a toggle joint (37) and fixed to the central box (7) by means of an elastic abutment (38), a vertical connecting rod (41) that is connected to the raisable nose (9) by means of a spherical abutment (42) and to the horizontal connecting rod (36) by means of a socket (43) for the passage of a controlled sliding locking transverse pin (44) arranged on one side of the fixed access nose (10) of the other bridge member (5) at the end thereof, whereby in the locked position of the raised access nose (9) of the bridge member (5) on the fixed access nose (10) of the other bridge member (5), each spherical abutment (42) and each elastic abutment (38) will absorb the lateral efforts that are exerted on the assembled bridge members (5) upon throwing these members (5) above a gap (3) and each vertical connecting rod (41) takes up the vertical efforts that are localized at the end of the fixed access nose (10) upon passage of the vehicles on the assembled bridge members.
  9. Bridge element according to claim 8, characterized in that the spherical abutment (42) comprises a nut (45) with spherical bearing means (46) screwed on the threaded end of the vertical connecting rod (41) and bearing on a conjugated spherical surface (47) of a base member (48) that is fixed onto a support part (49) rigidly connected with the raisable nose (9), the upper part of the vertical connecting rod (41) passing through the support part (49) and base member (48).
  10. Bridge element according to claim 8 or 9, characterized in that the elastic abutment (38) is fixed between the central box (7) and a radial lug (39) that is rigidly connected with the horizontal connecting rod (36) at its articulation to the central box (7).
  11. Bridge element according to one of claims 8 to 10, characterized in that the means for controlling the movement of the two transverse pins (44) of the fixed access nose (10) of a bridge member (5) comprise a transverse shaft (53) that is rotatably mounted in a casing (54) rigidly connected with the end of the fixed nose (10) ; two threaded rods (55) that are rigidly connected respectively with the two ends of the rotary shaft (53) coaxially thereto and on each one of which is assembled an innerly tapped sleeve that forms a locking transverse pin (44) ; and a means for rotatably driving the rotary shaft (53) in order to move in translation in two opposite directions the two sleeves (16) from a released position to a locked position of the end of the fixed access nose (10) of and to the two sockets (43) for connecting the two horizontal (36) and vertical (41) connecting rods of said raised access nose (9).
  12. Bridge element according to claim 11, characterized in that the means for rotatably driving said rotary shaft (53) comprises a driving rod (58) that passes through the fixed access nose (10) and one end part (58a) of which is rotatably mounted in the support casing (54) of the rotary shaft (53) and carries a conical pinion (60) that is in gearing engagement with another conical pinion (61) rigidly connected with the rotary shaft (53), the other end (58b) of the driving rod (58) being mechanically coupled with a pinion (64) that is rotatably mounted onto the fixed nose (10) on one side thereof and driven by means of a transmission chain.
  13. Bridge element according to claim 12, characterized in that the other end (58b) of the driving rod (58) is coupled to the rotation pin (63) of the lateral pinion (64) by means of a cardan joint (62).
  14. Bridge element according to one of the preceding claims, characterized in that the end of the raisable access nose (9) of the bridge member (5) is fixed to the fixed access nose (10) of the other bridge member (5) by means of two parallel hook forming parts (65) that are rigidly connected with the fixed access nose (10) near the edges thereof and are in engagement respectively in two longitudinal notches (66) made at the end of the raisable access nose (9).
  15. Bridge element according to one of the preceding claims, characterized in that the fixed access nose (10) of the other bridge member (5) comprises two lateral square-shaped abutments (67) that are rigidly connected with the end of the fixed access nose (10) and transversally maintains the corresponding part of the raised access nose (9) bearing on the fixed access nose (10) in the assembled position of the two bridge members (5).
  16. Bridge element according to one of the preceding claims, characterized in that it comprises two bridge members (5) with parallel upper rolling paths and the central boxes (7) of which are connected together by means of two connecting arms (6), and in that the two access noses that are positioned before or behind the two bridge members (5) are fixed (10) and raisable (9), respectively.
EP96401710A 1995-08-02 1996-07-31 Bridge element, especially for surmounting gaps by vehicles Expired - Lifetime EP0757131B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9509432 1995-08-02
FR9509432A FR2737512B1 (en) 1995-08-02 1995-08-02 WORKING STRUCTURE IN PARTICULAR FOR THE CROSSING OF BREACHES BY VEHICLES

Publications (2)

Publication Number Publication Date
EP0757131A1 EP0757131A1 (en) 1997-02-05
EP0757131B1 true EP0757131B1 (en) 2000-09-06

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EP96401710A Expired - Lifetime EP0757131B1 (en) 1995-08-02 1996-07-31 Bridge element, especially for surmounting gaps by vehicles

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US (1) US5862556A (en)
EP (1) EP0757131B1 (en)
DE (1) DE69610174T2 (en)
FR (1) FR2737512B1 (en)
WO (1) WO1997005332A1 (en)

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SG141334A1 (en) * 2006-09-08 2008-04-28 Gen Dynamics Santa Barbara Sis Bridge parts

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DE102004049969B8 (en) * 2004-10-14 2006-03-23 Military Mobile Bridges Gmbh Modular scissor bridge and installation device and method for laying collapsible bridges
FR2889213B1 (en) * 2005-07-27 2007-09-07 Mediterranee Const Ind SYSTEM FOR TRANSPORTING A WORK BY A ROAD VEHICLE WHICH CAN BE TRANSFORMED IN AN AMPHIBIOUS VEHICLE TO ALLOW A ROAD VEHICLE TO CROSS A DRY OR FILLED BREACH OF WATER
CN102433832B (en) * 2011-12-07 2014-11-19 北京市三一重机有限公司 Combined overpass and bridge body module of the same

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SG141334A1 (en) * 2006-09-08 2008-04-28 Gen Dynamics Santa Barbara Sis Bridge parts

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Publication number Publication date
DE69610174T2 (en) 2001-05-10
EP0757131A1 (en) 1997-02-05
DE69610174D1 (en) 2000-10-12
US5862556A (en) 1999-01-26
WO1997005332A1 (en) 1997-02-13
FR2737512B1 (en) 1997-10-10
FR2737512A1 (en) 1997-02-07

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