DE4325779C2 - Foldable and collapsible pedestrian bridge - Google Patents

Description

The invention relates to a collapsible Pedestrian bridge according to the preamble of claim 1.

There are various pedestrian bridges that can be dismantled known in disaster or for military cal purposes are used.

Mainly those from Jane's Military Logistics, 10th Edition, disassembled known in 1989 Pedestrian bridges with short spans of ver different sections to bridge Ge water used, for example placed on one or more floats and be interconnected.

This makes it possible for such demountable pedestrian bridge with a simple plank-like walkway to get along to the ones to be carried Loads on these short spans of the individual Distribute sections.

For larger spans can also be dismantled Pedestrian bridges from Jane's Military Logistics, 12th Edition, 1991-92 known that a trough-shaped Have cross-section made of paving slabs with side straps and patch railings.

These demountable pedestrian bridges have a large transport volume because the individual sections are not disassembled for transport can.

The invention is therefore based on the object to develop an easily dismantled pedestrian bridge, which especially for disasters or used for military purposes and themselves through

• - a low transport volume,
• - great static stability,
• - a large unsupported span of the assembled bridge and through a
• - lightweight design distinguished.

The object is achieved in such a way as stated in the claims.

The inner sections of the collapsible The bridge can be dismantled by a torsion bar biles structure with a triangular collapse ed cross section formed from the components Sidewalk element (A), side panels (B, C) and a sub Put the belt (D) together, two sides of this Structural cross section are articulated and the third side is detachably connected.

The preferred embodiment of the invention is based on the following arrangement of the joints:

• - A side part is on the sidewalk element as well hinged to the lower flange,
• - The other side part is only articulated on the lower flange connected and forms by means of a detachable Connection on the sidewalk element the triangular Structural cross section.

So stability when assembling and building this collapsible, collapsible bridge guarantee is the joints and releasable Connections of the side parts on the lower edge the walkway element arranged so that when in use of a mounting device enough space to go through the rollers are present.

An embodiment of the invention is on hand five schematic drawings:

Show it:

Fig. 1 shows a longitudinal section through an unfolded inner portion of the bridge support structure,

Fig. 2 shows a cross section of an unfolded inner portion of the bridge support structure,

Fig. 3 is a plan view of an inner portion,

Fig. 4 is a side view of the folded inner portion of a bridge structure and

Fig. 5 shows a cross section of the folded inner portion of a bridge structure.

Fig. 1 shows a longitudinal section through an expanded structure ( 1 ) of an inner portion of a demountable pedestrian bridge.

The supporting structure ( 1 ) consists of the diagonals ( 5 , 5 '), the posts ( 6 , 6 ') and the side parts (B, C) which are connected to the upper flange ( 9 ) by means of joints ( 7 ) or detachable connections ( 9 ). 3 , 3 ') and by means of joints ( 8 , 8 ') with the lower flange (D).

Handrail ropes ( 14 ) are pulled through the railing posts ( 13 ) inserted on both sides.

'8 8 and the walkway (4), the side portions (B, C) with the joints (7, FIG. 2 is the triangular cross-section with the individual components, the pavement member (A) with the upper chords (3, 3)' ) and the detachable connection ( 9 ) and the lower flange (D) with the lower flange couplings ( 12 , 12 ').

The railing posts ( 13 ) for the handrail ropes ( 14 ) are let into the upper chords ( 3 , 3 ').

On the lower edge ( 10 , 10 ') of the upper chords ( 3 , 3 ') of the walkway element (A) there is a free space for the running surface of the rollers ( 11 , 11 ') of an assembly device, not shown.

In Fig. 3, the top chords ( 3 , 3 ') with the intermediate walkway ( 4 ) and the lower chord couplings ( 12 , 12 ') below are shown in a plan view.

Fig. 4 shows a side view of a collapsed inner portion of a bridge structure ( 2 ), the upper flange ( 3 , 3 '), the lower flange (D) and the bilateral lower flange couplings ( 12 ) can be seen.

The folded inner portion of a bridge structure can be seen in cross-section in Fig. 5, with the side parts (B, C) with the attached lower flange (D) being longer than the width of the walkway element (A) in this embodiment. A shorter version of the side parts (B, C) in relation to the width of the walkway element (A) is also possible.

Reference list

AGeway element
B side part
CSide part
Bottom flange

1

Structure (unfolded)

2nd

Structure (folded)

3rd

,

3rd

'Top chord

4th

side walk

5

,

5

'Diagonal

6

,

6

'Post

7

joint

8th

,

8th

'Joint

9

Detachable connection

10th

,

10th

'' Lower edge of the top chord

11

,

11

'' Roller of an assembly device

12th

,

12th

'' Lower chord coupling

13

,

13

'' Railing post

14

Handrail rope

Claims (4)

1. Demountable pedestrian bridge, in particular for catastrophes or military purposes, consisting of two end sections and one or more identical inner sections which can be coupled, the inner sections consisting of a supporting structure with a walkway lying between straps, with a railing on both sides being spaced in the supporting structure, characterized in that each inner portion of the structure ( 1 ) has a triangular cross section, which is formed by the components walkway element (A), side parts (B, C) and lower flange (D), the upper flange ( 3 , 3 ') and the Walkway ( 4 ) form the walkway element (A) and each side part (B, C) consists of diagonals ( 5 , 5 ') and posts ( 6 , 6 ') and that for the purpose of collapsing the structure ( 1 ) into a transport unit ( 2 ) two side parts (B, C) of an inner section with a triangular cross section are connected to one another in an articulated manner and the third side is a releasable connection g ( 9 ). 2. Demountable pedestrian bridge according to claim 1, characterized in that the side part (B) by means of joints ( 7 ) in the region of the upper flange ( 3 ) with the walkway element (A) and by means of joints ( 8 ) with the lower flange (D) and that the side part (C) is connected to the walkway element (A) by means of a releasable connection ( 9 ) in the region of the upper flange ( 3 '). 3. Demountable pedestrian bridge according to claim 1, characterized in that both side parts (B, C) by means of joints ( 7 ) in the region of the upper straps ( 3 , 3 ') with the walkway element (A) are connected, and that the side part (B) is connected to the lower flange (D) by means of joints ( 8 ) and the side part (C) by means of a releasable connection ( 9 ). 4. A collapsible and collapsible pedestrian bridge according to claims 1 to 3, characterized in that in the area of the lower edges ( 10 , 10 ') of the upper chords ( 3 , 3 ') there is space for the passage of rollers ( 11 , 11 ') of an assembly device is.