FR2656353A1 - LIGHT TRANSPORTABLE WORK FOR CROSSING BREACHES. - Google Patents

Abstract

The present invention relates to a light transportable span for crossing gaps comprising at least one pair of sections (1) parallel and interconnected to form a track, characterized in that each section (1) consists of several identical, reversible and interchangeable modules (10a, 10b, 10c ...).

Description

The present invention relates to a light transportable span

  intended in particular for crossing breaches with so-called heavy equipment

  for example by armored vehicles.

  The crossing of breaches or other passages between two raised edges by so-called heavy equipment requires spans having not only a very particular aptitude for the speed of installation, but also a lightness facilitating

  their transport and their implementation.

  These imperatives of lightness and maneuverability are contradictory with the qualities of robustness, mechanical solidity and resistance to bending, taking into account the weight of the machines that can use these

spans.

  These spans are generally either spans of the scissor type, or either spans

  simple in several abutable sections.

  The scissor-type span comprises two or three inseparable elements which develop in rotation in a vertical plane around

of the common axis of two elements.

  After deployment, these spans can be placed either by means of an arrow or using

of a manipulator.

  The main drawback of these scissor-type structures is that, during deployment or removal, the structure rises to a height such that it is easily detectable by means of enemy observations. articulation and deployment system considerably weighs down the whole, which means limiting

  scope because the efforts on the deployment system

  cantilevers become too large.

  In the case of a single span, the sections are transported in a superimposed manner

  relative to each other, then moved in trans-

  lation by a manipulator, which, after locking the sections, is also used for depositing the span

thus formed.

  Until now, simple spans are generally formed by welded metal beams of large section or by lattice structures, so that the weight of spans is

  important which does not facilitate their implementation.

  However, it is known that the handling time during loading and unloading and the various installation maneuvers are predominant factors, particularly in the context of rapid operations. In addition, the assembly of the sections of the span is hitherto carried out by centering and connecting members formed for example by latches or still keys or else mechanical assemblies comprising a device for

  rack and pawl actuated by pusher.

  The centering and connecting members used are often complicated to implement

  taking into account the dimensions and the weight of the sections.

  The present invention therefore aims to propose a new type of simple span for crossing gaps allowing to reconcile the qualities of robustness, solidity, resistance

  mechanical flexion and lightness.

  The present invention therefore relates to a light transportable span for crossing breccias comprising at least one pair of parallel sections and connected together to form a raceway, characterized in that each section consists of several identical modules, and

reversible and interchangeable.

  According to other characteristics of the invention: the span comprises a single pair of sections, the span comprises several pairs of sections placed end to end, each section comprises at each end hooking means on the banks of the breach, the attachment means also form means for connecting a section with the other placed opposite, the connection means are formed by interlocking members of complementary shape, the interlocking members are formed at one end of the module, by a projecting part, and at the opposite end, by a housing of shape complementary to said projecting part, the modules are made by molding, the modules are made of a light material of low density, of high resistance and thin, the light material of low density and

  high strength is a composite material.

  The invention will be better understood using

  the description which follows will be given only as a

  example and made with reference to the accompanying drawings in which: Fig 1 is a top view of a pair of parallel sections of a span according to one invention, Fig 2 is a perspective view of two modules d 'a section of a span according to the invention. The span shown in Fig 1 consists of at least one pair of sections 1, the sections of each pair being interconnected by

sleepers 2.

  For crossing gaps, a single pair of sections 1 can be used or several pairs of sections 1 can be placed end to end to form at least one raceway allowing

the passage of vehicles.

  Section 1 is made up of several modules l Oa, 10 b, O c juxtaposed and joined together

  by suitable means not shown.

  Each module 10 a, 10 b, 10 c has a general parallelepiped shape, the upper face of which has a continuous curved profile for

  form the general slope of each section.

  Each section 1 has at each of its

  ends of the attachment means.

  For this purpose, each module 10 a, 1 Ob, c is provided at one of its ends for example 11a, 11b, 11c with a projecting part 12a, 12b, 12c and, at the opposite end for example 13 a, 13 b, 13 c, of a housing 14 a, 14 b, 14 c of form

  complementary to said projecting part.

  To form a section 1, the modules 10 a, 1 Ob, 10 c are juxtaposed in opposite directions with respect to each other, then assembled by suitable means not shown, so as to form a

  succession of projecting parts and housing.

  Thus, the sections 1 comprise at each end a succession of projecting parts and housings offset relative to those of the end of

the other section placed opposite.

  All modules 10 a, 10 b, 10 c are therefore identical, reversible, and interchangeable

with the others.

  According to the dimensions of the breach to be crossed, a single pair of sections 1 can be used or several pairs of sections 1 can be placed

end to end.

  In the case of using a single pair of sections 1, the projecting parts 12 a, 12 b, 12 c form attachment means on the banks of

the breach.

  These projecting parts 12 a, 12 b, 12 c provide the functions of stability, anchoring on the ground and perfect continuity of the curved profile of

the span.

  The use of a single pair of sections 1 is allowed thanks to the different characteristics of said sections 1 It is, on the one hand, the profile of the raceway which is defined according to an elongated curve and, on the other hand, of the arrangement of the projecting parts 12 a, 12 b, 12 c arranged at each

end of sections 1.

  This possibility is an important advantage.

  Indeed, the spans used so far consist, in general, of three pairs of inseparable sections and this to achieve a "bridge" whose general shape is repeated in this

  request by a single pair of sections 1.

  In the case of the use of several pairs of sections 1 placed end to end, the projecting parts 12 a, 12 b, 12 c and the housings 14 a, 14 b, 14 c form interlocking members of several pairs of section 1 placed opposite one another. These connecting means 12 a, 12 b, 12 c and 14 a, 14 b, 14 c make it possible to use a number of pairs of sections 1 corresponding to the dimensions of the breach to be crossed. The modules 10 a, 10 b, 10 c can be produced by molding in a light material of low density, high resistance and thin

such as a composite material.

  Given the design of the modules, it

  only one type of mold is needed to make the set

  ble modules and assemble said modules for example by gluing, in opposite directions by

  compared to the others to form a section.

  The number of juxtaposed modules is therefore easily modifiable depending on the width of the

  raceway that one wishes to obtain.

  This arrangement therefore makes it possible to produce modular spans of great length and of high resistance having a most volume-to-weight ratio.

weak possible.

  The spans according to the invention also have qualities of robustness, mechanical solidity and resistance to bending and have a very particular aptitude for the speed of laying, but also a lightness facilitating their transport and

their implementation.

Claims (9)

  1 Light transportable work for crossing breaches comprising at least one pair of sections (1) parallel and connected together to form a raceway, characterized in that each section consists of several modules (10 a, 10 b, 10 c) identical, reversible and interchangeable.   2 Work according to claim 1, charac-   terrified in that it comprises a single pair of sections (1).   3 Work according to claim 1, charac-   terrified in that it includes several pairs of   sections (1) placed end to end.   4 Work according to one of claims 1   to 3, characterized in that each section (1) comprises   te at each end of the hooking means (12 a,   12 b, 12 c) on the banks of the breach.   Work according to claim 4, characterized in that the hooking means also form connecting means (12 a, 12 b, 12 c and 14 a, 14 b, 14 c) from one section to the other placed opposite.   6 Work according to claim 5, charac-   characterized in that the connecting means are formed by nesting members (12 a, 12 b, 12 c and 14 a,   14 b, 14 c) of complementary shape.   7 work according to claim 6, charac-   characterized in that the interlocking members are formed, at one end of the module (10 a, 10 b, c), by a projecting part (12 a, 12 b, 12 c), and at the opposite end, by a housing (14 a, 14 b, 14 c) of form complementary to said projecting part. 8 Works according to any of the   previous claims, characterized in that   the modules (10 a, 10 b, 10 c) are produced by molding. 9 Works according to any of the   previous claims, characterized in that the   modules (10 a, 10 b, 10 c) are made of a light material of low density, of high resistance and thin.   10 Work according to claim 9, charac-   characterized in that the low density light material   and high strength is a composite material.