EP1878851A2 - Shuttering equipped with a walk platform with automatic locking in service position - Google Patents

Abstract

The shuttering (1) has a foldable moving platform (2) including a floor panel (4) that is fixed via its inner surface by screwing and bolting, on assembling crossbeams (5) that are pivotingly assembled on an infrastructure of the panel and are provided with automatic locking stages (7). The platform has an assembling stage that assembles a foldable and unfoldable balustrade (3). A foldable scale (41) is fixed under the panel (4) at a trap door. The balustrade is connected to the platform by the assembling stage with a sliding axis for performing operations in package and storage positions.

Description

The present invention relates to the field of the construction and public works industry, in particular the field of the manufacture of construction equipment and in particular formwork devices in the form of panels and has for object such a board provided with a platform automatic locking circulation system in service position.

Currently, the wall formwork is generally carried out by means of panels which are constituted by a formwork surface proper, by ground support means and verticality adjustment and by means of assembling adjoining banches them and which are further provided with ancillary safety devices, such as traffic platforms, the various components being assembled by means of bolts or pins.

The safety devices of these panels are essentially in the form of platforms equipped with guardrails and are generally mounted foldably on the panels. These platforms correctly fulfill their function of means of access at the top of the banches and security.

However, because of their weight, they require, for their unfolding and folding, the presence of at least two operators. This results in relatively long installation times resulting in an increase in the cost of the structures. In addition, these platforms implement a large number of assembly devices, in particular pins, which may be lost during assembly and disassembly successive. In addition, the maintenance position of said deployed platforms, with their guardrails, is ensured by additional props supported under said platforms. This results in a greater complexity of the well equipped panels and a corresponding additional cost.

We thus know, by FR-A-2,803,038 a gangway provided with means for holding in horizontal position in the form of pins subjected to the action of springs and automatically engaging in corresponding recesses of a cross member of the infrastructure of a formwork. However, these means require for their maneuver parts of special form with elastic deformation simply hooked to a retaining element in the form of an axis, via a hook, to achieve the unlocking position. However, this position of unlocking, because of the means used, is unreliable, the hooking of the hooks on the axis may be subject to clashes disengaging said hook of said axis and, secondly, the flexible blade carrying the hook connected to each pin can be subjected to mechanical fatigue and, therefore, no longer ensure the attachment by elastic deformation.

He is also known, by EP-A-1,413,696 , a mounting of a railing foldable and collapsible on a platform, but this assembly is of complex constitution and uses a specific locking means manually actuated or by means of a tool, so that this guard -body is not maneuverable by a single operator, in particular for its folding.

The present invention aims to overcome these disadvantages by providing a formwork equipped with a traffic platform that can be implemented quickly and simply by a single operator, without implementation of independent mounting part and allowing to obtain banches lower weight and lower cost.

For this purpose, the collapsible circulation platform, which is provided with a folding and foldable railing, the assembly being implemented by a single operator, without independent mounting part, and which is essentially constituted by a panel of floor, secured by its underside, by screwing or bolting, on pivoting mounting rails on the infrastructure of the board, each provided with a mounting bearing of the foldable and foldable railing, the floor panel being provided in addition, an access hatch and a foldable ladder being fixed under said floor panel, at said access door, is characterized in that the pivotally mounting rails on the infrastructure of the box are provided with self-locking bearings and that the foldable and foldable guardrail is connected to the folding platform by means of sliding-axis bearings, to perform maneuvers in position packing or storage.

• la figure 1 est une vue en élévation latérale d'une banche équipée d'une plateforme conforme à l'invention ;
• la figure 2 est une vue en élévation latérale, à plus grande échelle du montage de l'extrémité d'une traverse de montage sur la banche, en position de service de la plate forme ;
• la figure 3 est une vue analogue à celle de la figure 2 du montage de l'extrémité d'une traverse de montage sur la banche, en position de repliement de la plate forme ;
• la figure 4 est une vue en élévation frontale suivant la figure 2 ;
• la figure 5 est une vue partielle en élévation latérale de la plate forme en position de service, avec le garde-corps, et
• la figure 6 est une vue partielle en élévation latérale, à plus grande échelle, représentant le montage du garde-corps sur la plateforme.

The invention will be better understood, thanks to the following description, which refers to a preferred embodiment, given by way of non-limiting example, and explained with reference to the attached schematic drawings, in which:

• Figure 1 is a side elevation of a formwork equipped with a platform according to the invention;
• Figure 2 is a side elevational view, on a larger scale mounting the end of a cross mounting on the banche, in service position of the platform;
• Figure 3 is a view similar to that of Figure 2 of the mounting of the end of a cross mounting on the banche, in the folding position of the platform;
• Figure 4 is a front elevational view according to Figure 2;
• Figure 5 is a partial side elevational view of the platform in the service position, with the guardrail, and
• Figure 6 is a partial view in side elevation, on a larger scale, showing the mounting of the guardrail on the platform.

FIG. 1 of the attached drawings shows, by way of example, a box 1 equipped with a folding platform 2 provided with a foldable and foldable guardrail 3, the assembly being implemented by a single operator, without a part independent mounting. The folding platform 2 is constituted by a floor panel 4 fixed by its lower face, by screwing or bolting, on crosspieces 5 mounting pivoting on the infrastructure of the board 1 and each provided with a bearing 6 mounting the guard foldable and collapsible body 3.

Furthermore, the floor panel 4 is provided, in known manner, with an access hatch, not shown, and a foldable ladder 41 is fixed under said floor panel 4, at said access door.

In accordance with the invention, the pivotally mounting crosspieces 5 on the infrastructure of the panel 1 are provided with self-locking bearings 7 and the folding and foldable guardrail 3 is connected to the folding platform 2 by means of bearings 6 sliding axis, to perform maneuvers in the packing position or storage.

As is more particularly apparent from FIGS. 2 to 5 of the appended drawings, each self-locking bearing 7 is advantageously constituted by a connecting pin 8 passing through the lower edge of the end of the pivotally mounting crosspiece 5 on the infrastructure of the 1 and said infrastructure of the formwork 1, by a locking device 9 in the service position of the end of the pivoting mounting crossbar 5, equipping the infrastructure of the formwork 1 and an arrangement 10 of guide means and engagement, provided on the end of the pivotally mounting crossbar 5 and cooperating with the locking device 9, for the implementation of the lock.

The locking device 9 in the service position of the end of the pivoting mounting crossbar 5 is in the form of a latch 11 extending parallel to the connecting pin 8 and guided in a displacement parallel to said axis 8 in a bearing 12 constituting the infrastructure of the box 1 and housing the axis 8. Preferably, each bearing 12 is constituted by two cheeks, provided with lateral grooves for guiding the latch 11, whose ends are projecting from said cheeks, a cassette 13 for holding and guiding an actuating tab 14 connected to the lock 11 and loaded by a return spring 15 of said latch 11 in its service position being fixed between the cheeks constituting the bearing 12. Thus, the latch 11 is continuously urged to move downwards, seen in the direction of a vertical positioning of the panel 1, or towards the foot of the panel 1.

Arrangement 10 guiding and engaging means, provided on the end of the pivotally mounting crossbar 5 and cooperating with the locking device 9, for the implementation of the lock, is formed by an oblique edge of each vertical edge of the crossbar 5, extending from the lower edge of the end of the pivoting mounting crosspiece 5 carrying the connecting pin 8 and provided with a cam profile 16 curved towards the opposite edge of said cross member 5 pivoting mounting, this cam profile being adapted to cooperate on each side of the bearing 12, with the corresponding end of the latch 11 and terminating in a latching housing 17 of said opposite edge. The cam profile 16 is intended to allow, by pressing against the end of the latch 11, during a movement of movement of the crosspiece 5 of a position shown in Figure 3, corresponding to the folded state of the platform to a service position shown in Figure 2, a displacement of said latch 11, with its actuating lug 14 against the action of the return spring 15. It follows that the arrival of the crossbar 5 in the position shown in Figure 2, the latch 11 engages in the latching housing 17 and thus blocks the crossbar 5 in this position.

According to another characteristic of the invention and as shown more particularly in FIGS. 2, 3 and 5 of the accompanying drawings, each self-locking bearing 7 is advantageously provided, in addition, with a rod 18 for temporarily holding the latch 11 in place. retracted position, this rod 18 being mounted, at one end, to articulation on the connecting axis 8 of the bearing 7 and being provided at its other end, a on the other hand, a stop 19 for retaining the latch 11 in the position for disengaging it from the engagement housing 17 and, secondly, near this other end, under the stop 19, with a guide groove in pivoting 20 cooperating with a lug 21 projecting on the corresponding cheek of the bearing 12. Thus, it is possible to achieve a simple and fast way of maintaining the unlocking of the latch 11, for a folding of the platform. Indeed, by an action on the actuating lug 14, against the action of the return spring 15, the latch 11 can be pushed out of the latching housing 17 and it is sufficient to tilt the rod 18 on the axis link 8 of the bearing 7, in order to bring its stop 19 bearing under said latch 11. The tilting of the rod 18 is limited by its guide groove 20 cooperating with the lug 21, the arrival at the end of the race. pivoting of the rod will automatically correspond to the latch holding position 11 out of the housing 17. Of course, such an unlocking operation of the latch 11 is only performed during the folding of all the elements of the formwork and therefore the platform in horizontal position of said banche as will be explained later.

Each bearing 6 with sliding axis connecting the folding and foldable railing 3 to the folding platform 2 is advantageously constituted, as shown more particularly in FIGS. 5 and 6 of the accompanying drawings, by a tubular housing member 22, whose inner section corresponds to the section of the corresponding amount 3 'of the railing 3, this tubular housing member 22 being fixed by one of its sides on one side of the end of a corresponding pivoting mounting crossbar 5, perpendicular to the axis longitudinally of said crossbar 5, and being provided in its upper part, in extension of the lateral edge opposite to that of attachment to the crosspiece 5, a guide lug 23 provided with a guide groove 23 'cooperating with a pin of guiding and holding 24 through the amount 3 'of the guardrail, and a groove of corresponding shape (not shown) provided on the corresponding edge of the end of the trav 5 pivotally mounting flange, symmetrically to the guide groove 23 '. Preferably, the guiding and holding pin 24 is in the form of a rod provided at one end with a shoulder intended to bear on the guide lug 23 on either side of the groove 23 ', this rod being held in the service position by means of a pin or an elastic retaining washer (circlips) mounted on the other end of said rod and resting on the edges of the groove provided in the corresponding edge of the end of the pivoting mounting crossbar 5, on the inner face of this crosspiece 5.

This embodiment makes it possible to simply and quickly carry out a service position or a folding of the railing 3. Indeed, when the railing 3 is in the position shown in the accompanying drawings, the lower end of each of its uprights 3 'is engaged in the corresponding tubular housing member 22 and the guide and holding pin 24, which passes through the guide groove 23' of the guide tab 23, and the corresponding groove provided in the corresponding edge of the pivoting mounting crossbar 5, is supported in the lower part of said grooves ensuring the maintenance of the corresponding amount 3 'against vertical movement downwards. A vertical upward movement is prevented by the simple gravity, the weight of the assembly of the railing 3 ensuring the holding in the recessed position of the ends of the uprights 3 'in the tubular housing elements 22 corresponding.

For the folding of the railing 3, it suffices, simply, to move the latter perpendicularly to the folding platform 2, so that the lower end of the uprights 3 'can be entirely extracted from the tubular housing member 22, this movement being entirely guided by sliding the pin 24 in the guide groove 23 '. The complete extraction of the end of the railings 3 'out of the tubular housing elements 22 corresponding to the arrival in abutment of the pin 24 in the guide groove 23'. In this position, the end of each upright 3 'of the railing 3 is maintained only on the one hand, by the guide lug 23 and, on the other hand, by the corresponding edge of the crossbar. pivoting mounting 5, so that the railing 3 can be pivoted about the guide pins and holding 24, in a position substantially in extension of the floor panel 4 of the collapsible platform 2, which forms, in cooperation with the party upper of the tubular housing member 22 an abutment assembly against further pivoting of the uprights 3 ', the floor panel 4 preventing, furthermore, a folding of the railing on said floor panel 4.

According to a characteristic of the invention, the foldable ladder 41, fixed under the floor panel 4, at the level of the access hatch is provided on the upper part of its uprights with longitudinal grooves. guide 41 'intended to cooperate with fixing pins (not shown) to fastening lugs provided under said floor panel 4 between the outer edge of the access door and the outer edge of the panel 4. Such an attachment of the upper end of the foldable ladder 41 allows sliding movement of said end under the floor panel 4 in the packing position of the board 1.

Furthermore, the folding ladder 41 cooperates at its lower part with a retractable step 42, which is articulated at one end to the infrastructure of the formwork 1 and which is provided at its free end with hooks 43 or the like latching, in the service position, with the lower step of said foldable ladder 41. The implementation of such a foldable ladder with a step to maintain the service position of said ladder is particularly advantageous, because the step simultaneously ensures a locking in the service position of the ladder and access to the ladder ladder. Furthermore, the step also provides easy access to certain elements of the infrastructure of the banche.

The implementation of a platform according to the invention is carried out from a storage or packing position of a block 1, that is to say from a position of block 1 to horizontal, in which the platform 2 is folded against the infrastructure of the panel 1 in a pivoting position about the axis 8 of the self-locking bearings 7, as shown in Figure 3 of the accompanying drawings.

For this purpose, the railing 3 is put into service position by tilting from a position, not shown, in which it extends in extension of the platform 2 being connected to the latter through the intermediary of pins 24 cooperating with the guide grooves 23 'of the guide lugs 23 of the tubular housing elements 22, in its operating position shown in Figures 1 and 5. During this tilting, the amounts 3' of the railing 3 are brought in extension of the tubular housing elements 22 and it suffices for the operator to lower the railing 3 to penetrate the ends of the uprights 3 'in said tubular elements 22. This insertion of the ends of the uprights 3' is ensured by guiding the pins 24 in the guide grooves 23 ', so that the railing 3 is locked in its operating position.

After this establishment of the railing 3, it is sufficient for the operator to unfold the lateral parts of the railing, or guardrail end, generally folded in the bulk of its main part with the amounts 3 ', in a manner known per se and not described in detail.

The operator then performs the deployment operation of the platform 2 itself. For this purpose, he grasps the free end of the folding ladder 41, whose other end is slidably mounted under the floor panel 4 and is, in the folding position of the platform 2, partially engaged under this last.

By a displacement of the ladder towards the self-locking bearings 7, and therefore of the upper edge of the panel 1, a stop is formed making it possible to obtain, by action on the free end of the folding ladder 41 a lever arm facilitates the pivoting maneuver of the platform 2 about the bearing pins 8 7. It is then sufficient for the operator to tilt the platform 2 so as to bring the pivoting mounting rails 5 in a perpendicular position in block 1, that is to say in the position shown in FIGS. 1, 2 and 5.

During this tilting movement, from the position of the bearings 7 shown in Figure 3 to the position shown in Figure 2, the arrangement 10 of guiding and engaging means, provided on the end of the crosspieces 5 The pivoting mounting device makes contact with the latch 11 of the locking device 9 in the operating position and pushes the latch 11 against the action of its return spring 15. Each latch 11 is thus guidedly displaced in the lateral grooves of the bearing. 12 of the infrastructure of the board 1 on the cam profile 16, until it enters, on arrival in the deployed position of the platform 2, in the engagement housing 17 of the end of the crossbar 5 pivoting mounting. In this position, the lock is automatically engaged in the housing 17 under the action of its return spring 15.

After this deployment of the platform 2, the board 1 can then be operated, in the usual way, for its implementation on the site. After deployment of these various other means of shoring and positioning, the foldable ladder 41 is locked in its operating position by simply folding the step 42 with hooking of the free end of the latter by the hooks 43 or the like on the lower rung of the scale 41.

For the folding of the platform 2 for the purpose of packing or storage of the board 1, the maneuver is carried out in the opposite way to that described above, that is to say that the form 1 is first laid horizontally. Then an operator realizes the unlocking of the locks 11 assigned to each pivoting mounting beam 5 by pressing the corresponding actuating lug 14 to move said latch 11 against the action of its return spring 15. The latch 11 is thus completely cleared , at its ends, latching housings 17 and, by the action of the operator on the rod 18 for temporarily holding the latch 11 in the retracted position, it moves the stop 19 for retaining the latch 11 under said latch 11, so that the locking link in the service position of the platform 2 is interrupted.

It then suffices for the operator to place the ladder 11 in a position such that its upper end extends under the platform 2, its lower end then extending upwards in the manner of a lever, for, for example, a slight pull on said lower free end causing the platform 2 to tilt towards the infrastructure of the panel 1. This tilting can then simply be accompanied by the operator using the folding ladder 41 as a lever to ask platform 2 on the infrastructure of the box 1. The scale 41 is then simply also placed on the infrastructure of the section 1 taking care to keep it in the congestion of the latter. And, finally, the railing 3 is unfolded from its operating position in a horizontal position, parallel to the board 1 by lifting relative to the platform 2 to clear the lower ends of the uprights 3 'out of the elements tubular housing 22, with guiding, during the entire operation through the pins 24 cooperating with the guide grooves 23 'of the guide lugs 23, then, on arrival at the end of the pins 24 to the upper end of the grooves 23 ', by folding to the horizontal.

Thanks to the invention, it is possible to make panels equipped with a platform and a railing that can be easily and quickly deployed in the service position and folded in the storage or packing position by a single operator, with maximum safety for the operator.

In addition, because of the use of automatic locking and locking means, the use of independent mounting and / or locking accessories and can thus be lost is completely avoided, resulting in total and permanent security , as well as a saving of time appreciable during the various operations, as well as a gain in equipment, so that the cost of a well equipped form can also be reduced.

Of course, the invention is not limited to the embodiment described and shown in the accompanying drawings. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (10)

Banche (1) equipped with a collapsible platform (2) provided with a folding and foldable railing (3), the assembly being implemented by a single operator, without independent mounting part, said collapsible platform (2 ) being constituted by a floor panel (4) fixed by its lower face, by screwing or by bolting, on crosspieces (5) pivotally mounting on the infrastructure of the formwork (1) and each provided with a bearing ( 6) for mounting the foldable and collapsible guardrail (3), the floor panel (4) being further provided with an access door and a foldable ladder (41) being fixed under said floor panel ( 4), at the level of said access hatch, characterized in that the crosspieces (5) for pivoting mounting on the platform infrastructure (1) are provided with self-locking bearings (7) and the folding railing and collapsible (3) is connected to the folding platform (2) via bearings (6) with a color axis issant, to perform maneuvers in position of packing or storage. Banche according to claim 1, characterized in that each self-locking bearing (7) is constituted by a connecting shaft (8) passing through the lower edge of the end of the crossbar (5) pivotally mounting on the infrastructure of the formwork (1) and said infrastructure of the formwork (1), by a device (9) for locking in the service position of the end of the crossbar (5) pivoting mounting, equipping the infrastructure of the formwork ( 1) and by an arrangement (10) of guiding and engaging means, provided on the end of the pivotally mounting crosspiece (5) and cooperating with the locking device (9), for the implementation of the locking . Banche, according to claim 2, characterized in that the device (9) for locking in the service position of the end of the pivoting mounting crossbar (5) is in the form of a latch (11) extending in parallel the link axis (8) and guided in a displacement parallel to said axis (8) in a bearing (12) constituting the infrastructure of the formwork (1) and housing the axis (8). Banche, according to claim 3, characterized in that each bearing (12) is constituted by two cheeks, provided with lateral grooves for guiding the lock (11), the ends of which protrude from each other. said cheeks, a cassette (13) for holding and guiding an actuating tab (14) connected to the latch (11) and loaded by a spring (15) for returning said latch (11) to its operating position being fixed between the cheeks constituting the bearing (12). Banche according to any one of claims 2 to 4, characterized in that the arrangement (10) of guiding and engaging means, provided on the end of the crossbar (5) pivotally mounting and cooperating with the locking device (9), for the implementation of the lock, is formed by an oblique edge of each vertical edge of the crossbar (5), extending from the lower edge of the end of the crossbar (5) pivoting mounting means carrying the connecting pin (8) and provided with a cam profile (16) curved towards the opposite edge of said pivotally mounting crossbar (5), said cam profile being adapted to cooperate with each side of the bearing (12), with the corresponding end of the lock (11) and terminating in an engagement housing (17) of said opposite edge. Banche according to any one of claims 2 to 5, characterized in that each self-locking bearing (7) is further provided with a rod (18) for temporarily holding the latch (11) in the retracted position, this rod (18) being mounted at one end, hinged on the connecting shaft (8) of the bearing (7) and being provided at its other end, on the one hand, a stop (19) retaining of the latch (11) in its release position from the latching housing (17) and, on the other hand, near this other end, under the abutment (19), with a pivoting guide groove ( 20) cooperating with a lug (21) projecting from the corresponding cheek of the bearing (12). Banche according to claim 1, characterized in that each bearing (6) with a sliding axis connecting the folding and foldable railing (3) to the folding platform (2) is constituted by a tubular housing element (22), of which the inner section corresponds to the section of the corresponding upright (3 ') of the railing (3), this tubular housing member (22) being fixed by one of its sides to one side of the end of a crossbar (5). ) corresponding pivotal mounting, perpendicular to the longitudinal axis of said crossbar (5), and being provided in its upper part, an extension of the side edge opposite that of attachment to the crossbar (5), a guide tab (23) provided with a guide groove (23 ') cooperating with a guiding and holding pin (24) passing through the amount (3 ') of the railing, and a groove of corresponding shape provided on the corresponding edge of the end of the crossbar (5) pivoting mounting symmetrically to the guide groove (23'). Banche according to claim 7, characterized in that the guiding and holding pin (24) is in the form of a rod provided at one end with a shoulder intended to bear against the guide lug (23). on either side of the groove (23 '), this rod being held in the operating position by means of a pin or an elastic retaining washer (circlips) mounted on the other end of said rod and resting on the edges of the groove provided in the corresponding edge of the end of the pivotally mounting crossbar (5), on the inner face of this crossbar (5). Banche according to claim 1, characterized in that the foldable ladder (41), fixed under the floor panel (4), at the access door is provided on the upper part with its longitudinal groove struts. guide (41 ') for cooperating with fixing pins to fixing lugs provided under said floor panel (4) between the outer edge of the access door and the outer edge of the panel (4). Banche, according to claim 9, characterized in that the foldable ladder (41) cooperates at its lower part with a retractable step (42), which is articulated at one end on the infrastructure of the formwork (1) and which is provided at its free end with hooks (43) or the like engaging in service position with the lower rung of said foldable ladder (41).

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