FR2728922A1 - SCAFFOLDING PROVIDED WITH A SECURITY MOUNT FOR AT LEAST ONE LADDER - Google Patents

Abstract

Scaffolding comprising a floor (1) provided with a manhole (5) located in the vicinity of a first of its ends, a ladder (6) inclined under the first end of the floor for access to the manhole , and hooking means provided on the floor and the top of the ladder for removable hooking of the ladder to the floor; the first end of the floor has at least one opening (3) and / or a hook (7) for hooking up the ladder and the upper end part of the ladder is provided respectively with at least one hook and / or an opening; these opening and hook are configured and dimensioned in a relative manner so that the introduction of the hook into the opening and its extraction can only be carried out when the ladder is closer to the vertical than its functional position and than the first end floor is raised above its functional position; and blocking means are provided which oppose the lifting of the floor.

Description

Scaffolding fitted with a safety fixture for at least

a scale.

  The present invention relates to improvements made to scaffolding comprising: - at least one floor resting at its ends on respective crosspieces of the scaffolding, said floor being provided with a manhole located in the vicinity of a first of its ends for the passage of personnel from one floor to another of the scaffolding, - and at least one ladder extending in an inclined position under said first end of the floor to give access to the manhole, said ladder having a length greater than the height between the support of the foot of the ladder and the floor, hooking means being provided on the floor and the top of the ladder for

  removable attachment of the ladder to the floor.

  In traditional scaffolding, the ladders allowing passage from one level to another can be simply hung or fixed by simple mechanical means (for example bolting). When the ladders are easily removable (possibly after easy elimination of the mechanical fixing means), their theft is frequent; indeed, when it is present, the mechanical fixing means is only intended to ensure mounting security, and not to provide security

  against theft. When the ladder is fixed permanently

  nente floor, the whole is heavy, bulky, bulky and unwieldy; he is then shocked

prejudicial to its sustainability.

  The invention therefore essentially aims to

  propose an arrangement as simple as possible (i.e.

  say excluding anti-theft fixing means and using only a simple hook system, which does not require any long handling during the establishment or removal of the ladder) which ensures the attachment of

  the ladder to the floor with a possibility of separation

  tion facilitating the separate handling of the ladder and the floor and also facilitating their storage, while conferring

an anti-theft function of the ladder.

  For these purposes, a scaffolding as mentioned above, being arranged in accordance with the invention, is essentially characterized: - in that said first end of the floor comprises at least one opening and / or a hook for hooking the ladder and the upper end part of the ladder is respectively provided with at least one hook and / or opening, - in that said opening and hook provided in the floor and on the ladder are configured and dimensioned relatively in such a way that the insertion of the hook into the corresponding opening and its extraction can only be carried out when the ladder is in a position relatively closer to the vertical than its functional position and the first end of the

  floor is raised above its functional position-

  the, and - in that blocking means are provided which oppose

when raising the floor.

  Thanks to this arrangement, the ladder, once in position, can only be released by lifting the first end of the floor to make the jig of passage of each hook of the ladder or of the floor coincide with the outline of the corresponding opening of the floor or ladder respectively. However, this lifting of the first end of the floor can be made very difficult, or even impossible to carry out insofar as the release of the floor can itself be made complex and / or of long duration, for example if it involves a partial disassembly scaffolding. In a preferred embodiment, the floor locking means are constituted by locking means, known per se, which secure the floor to

  its support sleepers for security purposes, in particular

  tie to prevent it from being lifted by the wind. It is notably known that these locking means are blocked by the overhanging part of the scaffolding, which implies that the unlocking of said locking means and the release of the floor from its support crosspiece can only be achieved after dismantling of the entire overhanging part of the scaffolding. We therefore take advantage of the locking of the floor on its support crossmember to provide an auxiliary anti-theft function of the ladder, without

  that it is necessary to have recourse to additional means

expensive.

  Such an arrangement, involving the process of setting up and removing the ladder which has just been mentioned, considerably reduces the risks of theft of the ladder; also the ladder and the floor, once

  separate, are separate items that are easier-

  can be handled and stored individually.

  In addition, the safety of fixing the ladder is jointly increased, which no longer risks, being in a functional position, from unhooking partially or completely

in use.

  In a preferred embodiment, in the operating position-

  nelle of the floor and the ladder the opening extends substantially vertically by having a lower height

at the effective height of the hook.

  In a practical embodiment, the opening is provided on the floor, in particular in a transverse member of the floor, and the hook is provided on the upper end part of the ladder. The frame (which is preferably metallic) is adaptable both to wooden floors (for example by screwing) as to metallic floors (in particular by welding) or to mixed floors (for example by welding on the metal frame) ; this member can also be part of

the supporting structure of the floor.

  In particular, it is provided that the hooks and the corresponding hanging openings are respective

two in number.

  The arrangement according to the invention, although capable of applying to any floor configuration

  scaffolding, however, seems to have to find an applica-

  tion particularly interesting in the case where the floor has a hinged floor panel in rotation relative to the rest of the floor and having the above manhole. This is the case in particular for so-called "hatch floors", in which a lifting hatch closes the manhole and ensures the

  continuity of the floor in the closed position.

  The invention will be better understood on reading the

  detailed description which follows of an embodiment

  preferred which is given only as a simple example

  illustrative. In this description, we refer to

  attached drawings in which: - Figures 1 and 2 are sectional views showing a floor end and a ladder end suitable

  to cooperate with each other, in two functional positions-

different; and

  - Figures 3A to 3F are very schematic views

  illustrating the hanging and locking process

  of a ladder in a scaffolding according to the invention.

  Referring first to Figures 1 and 2, a scaffolding floor 1, which can be constituted in any suitable manner (wood, metal, or mixed) is equipped, at one of its ends (called below first end) of an element 2 provided with an opening 3, or preferably with two openings 3 distant from each other; element 2 is advantageously produced in the form of a frame, in particular metallic, which is then attached to the floor structure (screwing, welding, etc.) or which can also be an integral part of the metallic reinforcement of the floor, which it can for example constitute a spacer. In the case shown, the frame 2 is a simple flat iron attached to the inside of the curved U-shaped end of the support structure of the floor. In

  the example considered, the member 2 is transverse to the plane

  expensive. On this same end of the floor (as at the opposite end) is secured at least one mounting hook 4 intended for mounting the floor on a crosspiece

  (not shown in Figures 1 and 2) of the scaffolding.

  In practice, the hook 4 is produced in the form of a metal profiled part which is secured, for example by

  welding, on the end of the floor.

  To allow the passage of workers from one floor to another of the scaffolding, there is provided a manhole 5 made in the floor and a ladder 6, of any

  appropriate design, which includes, in its upper part

  lower, at least one hook 7; in practice two hooks are provided at the respective upper ends of the ladder uprights. This ladder has a length greater than the height separating the floor 1 from the support (lower floor, ground) on which the feet of the ladder rest, so that in the functional position the ladder

is tilted.

  In addition, each opening 3 of the floor and the hook 7 of the ladder are shaped and dimensioned relatively so that, when the floor 1

  is in its normal position and that scale 6 is present

  inclined tee below it (as shown in fig. 1), the hook 7 cannot penetrate into the opening 3 and hang in it, but that this hooking can only be obtained when the first end of the floor is in the raised position above its functional position (in principle substantially horizontal) and the ladder is brought into a position substantially closer to the vertical than its functional position (as shown in fig. 2). In the configuration shown in FIG. 1, the effective height (considered vertically) of the hook 7 of the ladder is greater than the effective height of the opening 3 and prevents the ladder from being hooked or unhooked; in the configuration of FIG. 2, the effective height of the hook 7 is less than the effective height of the opening 3 and allows the passage of the

hook in the opening.

  The establishment or removal of the necessary ladder

  site therefore a maneuver involving the lifting of the end of the floor 1. To avoid having to lift the end of a complete floor which is heavy, one can more advantageously provide that the manhole 5 is practiced in a floor panel which is articulated in rotation relative to the rest of the floor; it is this articulated floor panel which is then provided with the openings 3 and its lifting is easier. Likewise, it can be provided that a manhole 5 is associated with a hatch ensuring the

  continuity of the floor in the closed position.

  In FIGS. 3A to 3F, the various steps for setting up the ladder 6 are shown. In these figures, it has been assumed that the floor 1 has the articulated panel provided with the manhole mentioned above, this

panel being referenced by the.

  In FIG. 3A, a floor 1, la is placed in a scaffolding 8; the floor 1 rests by its

  extreme mounting hooks 4 on a cross member

  9 and on an intermediate cross member 10, while the hinged panel 1a is mounted by its extreme mounting hooks 4 on the cross member 9 opposite to the

  above and on said intermediate cross member 10.

  Then (fig. 3B), a ladder 6 is presented in an inclined position under the articulated panel 1a of the floor, a situation in which its end hooks 7 cannot

  not be engaged in the openings 3 of the articulated part

  the floor as explained above.

  The worker then brings the ladder 6 into a position closer to the vertical, which, given the excessive length of the ladder, causes the lifting of the

  hinged floor panel (fig. 3c).

  The hooks 7 of the ladder can then be engaged in the openings 3 of the articulated floor panel as explained above (fig. 3D); then the worker returns the ladder to a more inclined position, which allows the lowering of the hinged panel from the floor (fig. 3E). The ladder is then hung on it without being able

be cleared.

  Finally (fig. 3F), the floor is locked on its support crosspieces so that the first end of the floor can no longer be lifted and that consequently

  the ladder cannot be released and separated from the floor.

  To do this, the floor is locked in position using means which may advantageously be those already known and used to fix the floor for security purposes. Such particularly advantageous means to be used in the context of the invention are blocked by the overhanging part of the scaffolding and their unlocking can only be carried out after disassembly of the part

above the scaffolding.

  As is obvious and as already follows from the above, the invention is in no way limited to those of its modes of application and embodiments which have been more particularly envisaged; on the contrary, it embraces all its variants. In particular, in the example

  shown profile 2 extends transversely to the plane-

  expensive, which simplifies setting up and removing the ladder. However, for particular applications, the opening (s) can be arranged so

  different, for example on a longitudinal edge of the plane-

  expensive, which requires lateral movement of the ladder

for hanging or removing.

  It will also be noted that the relative positions of the hook (s) and the opening (s) can be reversed, the hook (s) being able to be provided on the floor and the opening (s) being able to be provided on the ladder.

Claims (8)

  1. Scaffolding comprising: - at least one floor (1) resting at its ends on respective crosspieces (9) of the scaffolding, said floor being provided with a manhole (5) located in the vicinity of a first of its ends for the passage of personnel from one floor to another of the scaffolding, - and at least one ladder (6) extending in an inclined position under said first end of the floor to give access to the manhole , said ladder having a length greater than the height between the support of the foot of the ladder and the floor, hooking means being provided on the floor and the top of the ladder for detachable hooking of the ladder to the floor, characterized - in that said first end of the floor has at least one opening (3) and / or a hook (7) for hooking the ladder and the upper end part of the ladder is respectively provided with at least one hook and / or one opening, - in that lesdi the opening and hook provided in the floor and on the ladder are configured and dimensioned in a relative manner so that the introduction of the hook into said opening and its extraction can only be carried out when the ladder is in a relatively more position close to the vertical that its functional position and that the first end of the floor is raised above its functional position, and - in that blocking means are provided which oppose the lifting of the floor, whereby the above floor is blocked on the cross and, its first end can no longer be raised, the ladder can not be separated from the floor. 2. Scaffolding according to claim 1, characterized in that, in the functional position of the floor and the ladder, the opening (3) extends approximately vertically, having a height less than the height effective hook (7).   3. Scaffolding according to claim 1 or 2, characterized in that the opening is provided on the floor and the hook is provided on the upper end part of the scale.   4. Scaffolding according to claim 3, characterized in that the opening (3) is provided in a frame (2)   of the floor (1) extending transversely.   5. Scaffolding according to claim 4, characterized   in that the frame (3) is metallic.   6. Scaffolding according to any one of the claims   1 to 5, characterized in that the hooks and   corresponding hooking openings (3) are respective- two in number.   7. Scaffolding according to any one of the claims   1 to 6, characterized in that the opening (3) for hooking   ladder chage (6) is provided in a panel (la) of the hinged floor in rotation relative to the rest of the   floor and comprising the aforesaid manhole (5).   8. Scaffolding according to any one of the claims   1 to 7, characterized in that the means for blocking the floor consist of means known per se of   locking of the floor on its support crosspieces.