FR2665204A1 - GATEWAY-FOLDING SUPPORT FOR FORMWORK BRANCHES. - Google Patents

Abstract

Footbridge (1) comprising locking means which are made up in combination: - of first hooks (9), each pivoting at one end of a rotation axis (90) integral with the profiles forming the sleepers (22) of the frame (2), so as to lock the articulated chair (4) in the folded position; - second hooks (8) independent in rotation around the axis (90) common to the first hooks (9) so as to lock your articulated chair (4) when it is in the unfolded position; - And a longitudinal tube integral at each of its ends with a plate mounted to rotate freely on the axis (90) common to the first and second hooks (9, 8) so as to be disposed opposite said first hooks (9) for locking the gangway (1) in the unfolded position on shoes (7) fixed against a wall (6).

Description

The present invention relates to improvements made to the past

  Repliab supports for shuttering and it aims

  more particularly the locking means allowing the pass-

  To be either tied for handling or storage, or unfolded in the position of use, that is to say suspended from hooves

in solidarity with a wall.

  We know gateways of this kind that generally include

  a chassis serving as a platform and under which pivots an articulated chair

  The latter consists of at least two deformed triangles

  interconnected by a longitudinal element allowing the synchronization

movements.

  Each deformable triangle comprises a bar which slides in a transverse beam of the chassis equipped with locking means, by

  example of the spacers bolts or pins pins These means of ver-

  rust co-operate with coaxial bores in the sliding bar and the beam so that the chair is immobilized

  in a folded or unfolded position.

  In the position of use, that is to say when the bridge is suspended on hooves, it is expected to add railing on the periphery of the frame The guardrails comprise at their base inclined rods of square section or circular, which come slide

  in slides of the same section integral with the frame.

  Such a gateway has certain drawbacks in terms of

  the locking means of the articulated chair and the guard

body on the chassis.

  We note more particularly that the locking of the chair

  articulated in unfolded position requires the intervention of several opera-

  who must demonstrate great skill, if only

  because the unfolded position is obtained when the bridge is sus-

  hung on a crane, which implies a lateral swing that does not facilitate

obviously not the lock.

  It is to these drawbacks that the more

present invention.

  The object of the invention is to provide self-locking means

  no longer using crossbolts or pins

  stitched, while remaining simple and easy to use.

  The invention also aims to use the fact that the bridge is suspended from a crane during its handling to trigger, without the intervention of operators, either the opening and locking of the articulated chair in the use position, or its folding and its

  lock in storage position.

  For this purpose, the invention is characterized in that the locking means are constituted in combination: first hooks, each pivoting at one end of a rotation axis integral with the profiles forming the cross members of the frame so as to lock the hinged chair in the folded position; second independent hooks rotating about the axis common to the first hooks so as to lock the articulated chair when in the unfolded position;

  and a fixed longitudinal tube at each of its ends.

  of a plate mounted free to rotate on the axis common to the first

  first and second hooks so as to be disposed opposite said first hooks for locking the bridge in position

  unfolded on hooves fixed against a wall.

  The accompanying drawing, given by way of example, will provide a better understanding of the invention, the characteristics that it presents and the advantages that it is likely to provide: FIG. 1 is a perspective view of the next bridge

the invention.

  FIG. 2 is a side view showing the bridge in position

  unfolded and suspended against a wall for its use.

  Fig 3 is a side view illustrating the bridge in posi-

folded storage.

  Fig 4 is a perspective view of the locking hook

  of the articulated chair in the folded position.

  Fig 5 is a perspective view of the locking hook

of the chair in unfolded position.

  Fig 6 is a perspective view of the locking tube of

  the bridge in position hung against a wall.

  Figs 7 and 8 are perspective views of the immobilizer hook.

  the guardrail of the bridge.

  FIGS. 1 and 2 show a gateway 1 in the decent position

  folded, having a metal frame 2 with a generally rectangular profile

  re, on which are articulated a railing 3 and a chair 4.

  The railing 3 comprises a metal frame 30 in the middle of which

  is welded a protective mesh 31 The frame 30 is stiffened following

  its length by a plinth 32.

  The articulated chair 4 consists of identical deformable triangles

  40 ticks whose number (two in this case) may vary depending on the length of the frame 2 The deformable triangles 40 are connected between

  them by a tube 41 with square or rectangular section, allowing the

  chronization of the movements of the different triangles 40.

  Since the deformable triangles 40 are identical, it has been preferred, for the sake of clarity and comprehension, to describe only one

  This frame 2 consists of two longitudinal beams

  20 and 21 which are interconnected by sleepers 22 of

  chassis frame The latter is reinforced in its length.

  23 beams 23 integral with the sleepers 22 and on which rest wooden boards 24 realizing the platform known per se

for the passage of the workers.

  The longitudinal beam 20 has two brackets along its length

  overturned 25 and 26 integral with one another to form a sliding

  25 in which slides a support 25 b for fixing a strut 25 c the bracket 25 is associated with a gusset 25 d and a hook

  immobilization device 5 enabling pivoting and locking of the guard

  body 3 which will be explained better later operation.

  The longitudinal beam 21 is connected to the longitudinal members 23 by several

  two sleepers 21a with a square or rectangular cross-section

  the chassis frame 2 In addition, the longitudinal beam 21 com-

  a number of vertical guides 21b on its length

  square support for sliding millimetric supports 21 c known per se These millimeter supports allow height adjustment and

  the establishment of vertical docks 21 d which are retained by the in-

  In addition, the beam 21 makes it possible to hang the bridge 1 against a wall 6 by means of shoes 7, known per se, which

  are fixed by tie rods 7 to the wall (fig 2).

  The sleepers 22 consist of two profiles 22a and 22b to

  C-shaped section facing each other so as to achieve a sliding

  cross-section 22 c (fig 4) whose function will be explained further below. The lower part of the longitudinal beam 20 carries an ear 20a provided with an axis of rotation 20b (FIG. 3) which cooperates with

  a double stay 40 a belonging to the articulated chair 4 This double height

  ban 40 a has at its free end an axis of rotation 40 b on the one hand for the pivoting of a hollow bar 40 c with a square section, serving as a spacer, and on the other hand for fixing the longitudinal tube 41 which allows the articulated chair 4 once unfolded to take support

against the wall 6.

  The upper end of the hollow bar 40 c is integral with two circular ears 40 e (FIG. 5) which cooperate with the slide 22 c

  to guide the articulated chair 4 in its transverse movements.

  When the latter is unfolded, we can notice that the hollow bar

  40 c is locked in translation by a pivoting hook 8 which is ex-

  will better explain the operation further.

  FIG. 3 shows the bridge 1 in the folded position allowing

  so much its stacking with other passere l for its storage or

his transport.

  Note that the double stay 40 has bends along the arrow F 1 so that the hollow bar 40 c slides in the slide 22 c until a retaining finger 40 d, secured to the double stay 40 a ,

  cooperates with a pivoting hook 9.

  Similarly, the guardrail 3, once unlocked, can be folded according to the arrow F 2 on the boards 24 of the platform so as to

  reduce the footprint e of the gateway 1.

  In FIG. 4, there is illustrated the hook 9 allowing the locking of

  the articulated chair 4 in the folded position This hook 9 comprises a

  9a for retaining the finger 40d, and an inclined edge 9b

  both the opening of said hook The outer face 9c of the hook 9 is so-

  lidaire of a handle 9 d allowing the opening according to the f Lèche F 3 du-

  said hook in order to release the retaining finger 40 d of the double stay cable a. The hook 9 is rotatably mounted at one end of an axis 90 provided on the upper face of the profiles 22a and 22b of the

  In addition, the hook 9 is retained laterally between the profile

  Le 22 a and a washer 90 welded at the end of the axis 90, while the ro-

  tation is interrupted by a limit stop 91 secured to the

  external vertical face of the profile 22 a.

  FIG 5 shows a hook 8 for locking the articulated chair 4 in the unfolded position and more particularly

  for the retention of the bar 40 c of the deformable triangle 40.

  The hook 8 is constituted by a rectangular plate 8 a-

  view at one of its ends of a bearing 8b rotatably mounted

  around the axis 90 common to the hook 9, so that it is guided laterally

  in the upper free space of the slideway 22c provided between the profiles 22a and 22b Under the plate 8a are welded two limit stops 8c and 8d, whose width is calculated so that they

  can enter the upper Free Space defined previously.

  On one of the edges of the plate Sa is welded a handle 8 e allowing the control of the hook 8 to release the bar 40 c of the

  deformable triangle 40 for folding.

  FIG. 6 shows a longitudinal tube 10 of circular section allowing the gateway 1 to be locked on the shoes 7

known in itself.

  The longitudinal tube 10 is integral at its end with a plate

  10 rectangular rotatably mounted on the axis 90 common to cro-

  The plate is in particular arranged opposite to the cro-

  chet 9 and near the profile 22 b.

  In addition, the longitudinal tube comprises control means 10b, for example hooks associated with chains or cables for driving said tube in a quarter-turn rotation along the arrow F 4 When the gateway 1 is mounted in the shoes 7, it is locked via the tube 10 which passes under a stop

  horizontal retaining 7b integral with said hooves 7.

  FIGS. 7 and 8 show the retaining hook 5 enabling the guardrail 3 to be locked in the open position. The frame 30 comprises a vertical upright 33 whose end is in the form of an inclined heel 33 and has a bore 30. 33b so as to cooperate with an axis of rotation

  e secured to the gusset 25 d The vertical face 25 f of the profile 25 comprises

  takes a sleeve 252 traversed by an axis of rotation Sa integral with the

retaining hook 5.

  A counter-stop 5b is welded on the axis of rotation 5a so

  to oppose a retaining stopper 5c secured to the hook 5.

  The end opposite the retaining stopper 5c is integral with a tube

  longitudinal 5 d with square section The tube 5 d is connected to another disc

  latch positive identical to that just described, so as to synchronize the pivoting hooks 5 for the release of the

  In addition, the weight of the longitudinal tube 5 automatically leads to

  the hook 5 in the locking position.

  The operation of the locking means of the bridge 1 is easily understood The operator must proceed in the following manner from the folded position on the ground of the gangway 1 (FIG. 3): it opens the guard rail 3 which pivots around its axes of rotation 25 e until each inclined heel 33 has been blocked by its hook 5 (FIGS. 2, 7 and 8);

  it fixes the hook of a crane to the control means 10 ob SO-

  lidaires longitudinal tube 10 which pass through some boards 24 of the platform (Fig 6); it opens manually the pivot hook 9, to release the retaining finger 40 d of the double stay 40 a (Fig 4); With the aid of the crane, he raises the bridge 1, which causes the quarter-turn of the tube 10 to pivot until it

  come up against the sleepers 21 in order to balance the loads

  traction; this uplift involves the sliding of the bar

  dig 40 c in slide 22 until it is blocked automatically.

  translationally by the hook 8 (FIGS. 2 and 5); it brings the gateway 1 to its location of use,

  so that the longitudinal beam 21 engages in the hooves 7 pre-state

  blis against the wall 6; it detaches the control means 10b so as to release the longitudinal tube 10, which due to its own weight pivots to come against the shoes 7 to be retained by the horizontal stop 7b, thus achieving the locking of the bridge 1 on the wall 6; it adjusts the height millimeter supports 21 c for the establishment of banquettes 21 d; and it positions the supports 25b in the slide 25a of

  in order to fix the struts 25 c to maintain the banches 21 d.

  For the folding of the gateway 1, the operator proceeds in the manner

following re:

  he removes the banches 21 d and the struts 25 c of the passerel-

  1; it attaches the hook of a crane to the control means 10b secured to the longitudinal tube 10; it raises the gateway 1, which causes the pivoting

  a quarter of a turn of the longitudinal tube 10, so as to release the

  21 clogs 7, said tube abutting against the cross members 21a of the frame 2; it brings the bridge 1 in contact with the ground, so that the longitudinal tube 41 rests there; it maneuvers the hooks 8 manually to release the hollow bar 40 c abutments 8c and 8d;

  he goes down the bridge 1 so as to provoke

  hollow bar 40 c in slide 22 c, until the

  retaining finger 40 d is in contact with the inclined portion 9 b of the crank

  chet 9, to rotate it about the axis 90 until the retaining finger is housed in the notch 9 has for its lock L Lage; it detaches the hook of the crane control means 10 b causing the return of the longitudinal tube 10 in the rest position; and it presses the hook 5 to release the heel 33a of the frame 30 to fold the railing 3 on the platform of the pas-

serelle 1 (f Lèche F 2 of fig 3).

  It goes without saying that such a gateway 1 can be associated with ac-

  cages known in the technical field used, that is to say for example extensions of footbridge or railings and extensions

angle 45.

  It must, moreover, be understood that the foregoing description

  given as an example and that it does not limit the

  not of the invention of which one would not go out by replacing the details

  described by any other equivalent.

7

Claims (9)

CLAIMS V E N D I C A T I 0 N S   1 collapsible support bridge for formwork shutter, of the kind comprising a metal frame provided with locking means for the retention of an articulated chair, characterized in that the locking means are constituted in combination:   first hooks (9), each pivoting to one of the ends   Means of an axis of rotation (90) integral with the profiles (22 a, 22 b) form-   mantling the sleepers (22) of the frame (2) so as to lock the hinged chair (4) in the folded position; second hooks (8) independent in rotation about the axis (90) common to the first hooks (9) so as to lock the articulated chair (4) when in the unfolded position; and a longitudinal tube (10) integral at each of its ends with a plate (10a) rotatably mounted on the axis (90) common to the first and second hooks (9 and 8) so as to be arranged opposite said first hooks (9) for locking the bridge (1) in unfolded position on shoes (7) fixed against a wall (6).   2 bridge according to claim 1, characterized in that the frame (2) comprises a guardrail (3) which is articulated around axes   (25 e) and who is immobilized in a position through the   mediate of pivoting hooks (5).   3 gateway according to claim 1, characterized in that the first hooks (9) each comprise a notch (9a) and an inclined edge (9b) for the retention of the fingers (40 d) of the articulated chair (4). 4 bridge according to claim 1, characterized in that the outer face (9 c) of the first hooks (9) comprises a handle (9 d)   for opening said hooks (9).   Gateway according to claim 1, characterized in that   the second hooks (8) each consist of a rectangular plate   gular (8 a) secured to two end stops (8 c and 8 d).   6 Gateway according to claims 1 and 5, characterized in that   that the limit stops (8c and 8d) of the second hooks (8) are of a width calculated to be able to penetrate the free space   upper slide (22c) provided between the profiles (22a and 22b).   Gateway according to claims 1, 4, 5 and 6, characterized   in that the Laquette (8a) of the second hooks (8) is welded to a   handle (8 e) allowing the opening of said hooks.   Gateway according to claims 1, 5, 6 and 7, characterized   in that the second hooks (8) are guided laterally in the space   this upper of the slide (22 c). 9 bridge according to claim 1, characterized in that the longitudinal tube (10) is integral with control means (10 b) of   to drive it in a turn of a quarter of a turn.   Gateway according to claims 1 and 9, characterized   the longitudinal tube (10) comes against the sleepers (21 a) of the   frame (2) to balance the tensile loads at the time of lifting of said gateway.   Gateway according to claim 2, characterized in that   the hooks (5) are locked in the locking position by means of   mediate the longitudinal tube (5 d).   Gateway according to claims 2 and 11, characterized in that   the axes of rotation (5a) of the hooks (5) have a counter   stop (5b) opposing the restraining stop (5c) interdependent with said hooks (5).