FR3059348A1 - ESCAMOTABLE STAIRCASE - Google Patents

Abstract

Stair (1), intended to adopt two positions, namely a folded position and a position of use, comprising a right flight (2) and an upper bearing (3) fixed to at least two uprights (4), characterized in that that the right volley (2) is connected to the upper bearing (3) by at least one rotation means.

Description

059 348

61484 ® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders)

©) National registration number

COURBEVOIE © IntCI ⁸ : E 04 F11 / 06 (2017.01)

PATENT INVENTION APPLICATION

A1

©) Date of filing: 25.11.16. ©) Priority: © Applicant (s): ROUX FABIEN — FR. @ Inventor (s): ROUX FABIEN. ©) Date of availability of the request: 01.06.18 Bulletin 18/22. ©) List of documents cited in the preliminary search report: See the end of this booklet (© References to other related national documents: ® Holder (s): ROUX FABIEN. ©) Extension request (s): © Agent (s): CABINET GASQUET.

PU RETRACTABLE STAIRCASE.

IP /) Staircase (1), intended to adopt two positions, namely a folded position and a position of use, comprising a straight flight (2) and an upper bearing (3) fixed to at least two uprights (4), characterized in that the straight flight (2) is connected to the upper bearing (3) by at least one means of rotation.

FR 3 059 348 - A1

i

RETRACTABLE STAIR

The present invention relates to a staircase, intended to adopt a folded position and a position of use.

An external straight staircase, serving the first floor of a building, is commonly formed by a straight flight extended by an upper landing supported by uprights. These generally metallic structures are supplied in kit form and installed on site.

The installation of an external staircase requires the prior assembly of the upper landing supported by uprights, followed by the positioning of the right flight by a lifting device in correspondence of the upper landing and fixing of these latter elements together.

These operations are not only restrictive, but also present significant risks for operators, during the assembly of the constituent elements of the staircase, in particular due to the weight of this type of structure, but also to the possible mounting of additional scaffolding.

The present invention thus provides a staircase, making it possible to overcome the aforementioned drawbacks.

Thus, the staircase according to the invention is intended to adopt two positions, namely a folded position and a position of use, comprising a straight flight and an upper landing fixed to at least two uprights, while the right flight is connected at the upper level by at least one rotation means.

According to embodiments, the uprights are fixed to the outer end of the upper bearing.

According to a preferred embodiment, the uprights are movable in rotation.

According to one characteristic, one of the interior ends of the straight flight and / or of the upper bearing comprises / comprise at least one clearance stop limiting the angular displacement of at least one means of rotation.

According to one embodiment, at least one rotation means comprises a ball joint mounted in collaboration with a shaft.

According to one characteristic, the staircase according to the invention comprises at least one attachment means, such as a sling hook, located near the upper landing, preferably in the vicinity of at least one rotation means.

According to one embodiment, at least one upright comprises an external profile fitted on an internal profile extended by a support pad.

According to another embodiment, at least one upright and the upper bearing are connected by at least one movable locking means.

According to the previous embodiment, at least one movable locking means comprises a compass system combined with a stabilizer bar, the lower end of which fits into a housing arranged in one of the uprights.

According to an additional characteristic, at least the straight flight comprises at least one flat locking means intended for temporary fixing in the folded position of at least the right flight to at least one upright.

Other characteristics and advantages of the invention will emerge from the description which follows with reference to the appended drawings which are given only by way of nonlimiting examples.

Figures 1 to 5 are views of the staircase according to the invention, according to one embodiment.

FIG. 1 is a front perspective view of the modular metal staircase in a folded position,

FIG. 2 is a magnification view of FIG. 1,

Figure 3 is a side perspective view from below of the modular metal staircase in an intermediate position.

FIG. 4 is a rear perspective view of the modular metal staircase in a position of use,

FIG. 5 is a magnification view of FIG. 4.

Figures 6 and 7 are views of the staircase according to the invention, according to another embodiment.

Figure 6 is a front perspective view of the modular metal staircase in an intermediate position.

FIG. 7 is a magnification view of FIG. 6.

Thus, the staircase (1) according to the invention is in the form of an articulated metal structure, adapted to adopt two positions, namely a flat folded position for transport and storage, as illustrated in Figure 1 , as well as a position of use, as illustrated in Figure 4.

Let us add that the staircase (1) comprises a straight flight (2) assembled with an upper landing (3), which is itself fixed to at least two uprights (4).

Note that the straight flight (3) and the upper bearing (3) are rotatable relative to each other according to a determined clearance, in order to be able to pass from the folded position to the position of use, by a vertical traction, using a lifting device, as explained in more detail in the following description.

It is understood that the travel is determined by the height of the upper bearing (3) and the length of the right flight (3).

In the folded position, the assembly formed by the straight flight (2) and the upper bearing (3) is aligned along a common general axis, or even along parallel axes, forming a planar or substantially planar metallic structure.

Note that the right flight (2) and the upper landing (3) are linked by at least one rotation means (5) participating in the junction and the mobility of these last two elements.

Let us add that a means of rotation (5) is advantageously composed of two fixed parts, movable with respect to each other, one of the parts of which is secured to the straight flight (2), while the other is secured to the upper bearing (3).

Preferably, as illustrated in FIGS. 1 to 7, the junction between the straight flight (2) and the upper bearing (3) is carried out by at least two rotation means (5) advantageously lateral, but it could be otherwise , at least two rotation means (5) are located at the junction of the inner ends (2a, 3a) respective of the straight flight (2) and the upper bearing (3).

According to the illustrated embodiments, the staircase (1) comprises two lateral rotation means (5) each formed by a ball joint (5a) mounted in collaboration with a shaft (5b) forming an axis of rotation, as illustrated in detail in Figure 2.

According to one characteristic, one of the two elements constituting the assembly formed by the straight fly (2) and the upper bearing (3), comprises at least one clearance stop (7) limiting the angular displacement of at least one means of rotation (5).

Note that a travel stop (7) is advantageously an independent part located at one of the interior ends (2a, 3a) of the straight flight (2) or of the upper landing (3), interacting with the other interior end (2a , 3a) arranged in correspondence with the other element forming the staircase (1), but it could be otherwise, a clearance stop (7) is represented by one or the inner end (s) (2a, 3a) of the straight flight (2) and / or of the upper landing (3), interacting with each other by form cooperation.

A travel stop (7) also plays the role of a connecting piece between the two inner ends (2a, 3a) of the straight fly (2) and of the upper bearing (3), distributing the forces generated by the weight of the structure in the position of use.

According to one characteristic, the internal ends (2a, 3a) of the straight flight (2) and of the upper bearing (3) each comprise at least one means for holding in the use position (15a, 15b), which for example lock using a pin, while each of the means for holding in the use position (15a, 15b), according to the illustrated embodiment, comprises an orifice intended for the insertion of the latter.

According to the preceding characteristic, at least one means for holding in the use position (15a) located at the inner end (2a) of the straight flight (2) is positioned in correspondence with that located on the inner end (3a ) of the upper bearing (3).

According to an additional characteristic, the staircase (1) is equipped with at least one hooking means (8), such as two sling hooks, arranged on either side of the staircase (1), advantageously near the upper landing (3), preferably at the junction of the straight flight (2) and the upper landing (3), more preferably located on at least one rotation means (5) advantageously lateral.

As explained above, at least one hooking means (8) allows the staircase (1) to be lifted by a lifting device, such as a crane or a crane truck and as partially illustrated in FIG. 3 .

The vertical pulling movement of the staircase (1), causes the angular displacement of the right flight (2) relative to the upper landing (3), from the folded position, in which the right flight (2) is advantageously aligned with the upper bearing (3), towards the position of use, in which the right flight (2) forms an angle with the upper bearing (3), the outer end (2b) of the right flight (2) rests on the ground, while the respective inner ends (2a, 3a) of the straight flight (2) and the upper bearing (3) are in contact via at least one clearance stop (7), and linked by the at least one rotation means (5), while the means for holding in the use position (15a, 15b) are locked, for example by a pin.

Recall that the staircase (1) comprises at least two uprights (4) fixed to the upper landing (3).

According to the illustrated embodiments, the upper bearing (3) is equipped with two uprights (4) movable in rotation, located substantially at least below its outer end (3a).

An upright (4) movable in rotation is actuated by a joint (6), from the folded position towards the position of use. In the folded position, an upright (4) is placed below the upper bearing (3) and at least part of the right flight (2).

Note that in the folded position, flat locking means (5), which are presented according to the illustrated embodiments, by locking tabs, located both under the bottom surface of the stringers (14) of the straight flight (2 ) that under the lateral edges of the upper bearing (3), are assembled by usual fixing means, such as screws or nuts combined with bolts, to the uprights (4) arranged parallel to the constituent elements of the staircase (1).

Note that the joints (6) of the uprights (4) movable in rotation are pivot connections.

Add that in order to be able to adjust the length of the uprights (4), the uprights (4) are advantageously sliding, that is to say that they comprise a hollow external profile (4a) in which is embedded an internal profile (4b) which is advantageously extended by a support pad (4c) on the ground.

It should be noted that two uprights (4) are advantageously reinforced by a trellis structure composed of side members and braces.

Note that the uprights (4) movable in rotation are held in the position of use at the upper landing (3) by movable locking means (9), such as compass systems (10) safety, composed of two branches ( 10a, 10b) mounted on a pivot, connecting the uprights (4) to the upper bearing (3).

According to the embodiment illustrated in Figures 1 to 5, the movable locking means (9) comprise a set of compass systems (10) which

Ί close in the direction of the right flight (2). These compass systems (10) are combined with blocking means which are provided by stabilizing bars (11) which lock under stress against the internal or lateral faces of the uprights (4).

According to the embodiment illustrated in Figures 6 and 7, the movable locking means (9) comprise a set of compass systems (10) which close in the direction of the outer end (3b) of the upper bearing (3). These compass systems (10) are combined with blocking means which are provided by stabilizing bars (11) which lock under stress against the external or lateral faces of the uprights (4).

Note that a stabilizer bar (11) is provided by a bent profile whose upper part (11a) is integral with the lower branch (10b) of a compass system (10), while the lower end (11b) each of the stabilizer bars (11) fits under stress in a housing arranged in one of the uprights (4), as illustrated in FIG. 5.

According to other embodiments, not shown, at least two uprights (4) are removable.

According to the previous embodiments, in the folded position, the removable uprights (4) are advantageously fixed to the flat locking means (12) of the straight fly (2) and of the upper bearing (3), ensuring their maintenance in the flat position , while in the position of use, the modular staircase (1) being retained in the high position by a lifting machine, the uprights (4) removable are fixed at least to the upper bearing (3), by fixing means usual.

A straight flight (2) is commonly formed by a succession of straight steps and advantageously counter-steps held between two straight stringers (14). A straight flight (2) is also surmounted by one or advantageously by two railings, which each include a rail, commonly called handrail.

Note also that the upper landing (3) is equipped with at least one body guard.

According to one embodiment, the guardrail (s) is / are removable (s), in order to be stored (s) on the right flight (2) and advantageously the upper bearing (3), during transport and storage of the modular staircase (1) according to the invention.

According to one characteristic, in the context of solid railings, the latter comprise openings facing the hooking means (8), in order to be able to easily release the modular staircase (1) from the lifting machine, in position of use.

According to the previous embodiment, as illustrated in particular in FIG. 1, the straight fly (2) is equipped under the lower surface of the stringers (14), with two fork grips (13), allowing the superimposition of the at least two modular staircases (1) in which the body guards are removed. The fork plugs (13) of a first modular staircase (1) in the upper position being intended to rest on the upper surfaces of the stringers (14) of a second modular staircase (1) in the folded transport and storage position.

It is understood that the fork grips (13) are located substantially at the load center of the modular staircase (1).

It is also understood that a fork socket (13) is intended both for supporting a modular staircase (1) in the folded position, and for lifting and transporting the staircase (1) by a forklift. fork.

Note that at least one of the side walls of the upper landing (3), or even one of the side walls of a stringer (14), rest (s) or is / are fixed (s) on / to a deciphering wall.

Thus, the staircase according to the invention allows prior assembly in the workshop and rapid installation on site, only using a lifting device, by the simple vertical traction of the structure and advantageously by the simple deployment of the uprights. .

Claims (10)

1. Staircase (1), intended to adopt two positions, namely a folded position and a position of use, comprising a straight flight (2) and an upper bearing (3) fixed to at least two uprights (4), characterized in that the straight flight (2) is connected to the upper bearing (3) by at least one rotation means (5). 2. Staircase (1) according to claim 1, characterized in that the uprights (4) are fixed to the outer end (3b) of the upper bearing (3). 3. Staircase (1) according to claim 1 or 2, characterized in that the uprights (4) are movable in rotation. 4. Staircase (1) according to any one of the preceding claims, characterized in that one of the or the inner ends (2a, 3a) of the straight flight (2) or / and of the upper landing (3), comprises / comprise at least a travel stop (7) limiting the angular displacement of at least one rotation means (5). 5. Staircase (1) according to any one of the preceding claims, characterized in that at least one rotation means (5) comprises a ball joint (5a) mounted in collaboration with a shaft (5b). 6. Staircase (1) according to any one of the preceding claims, characterized in that it comprises at least one hooking means (8), such as a sling hook, located near the upper bearing (3), preferably in the vicinity of at least one rotation means (5). 7. Staircase (1) according to any one of the preceding claims, characterized in that at least one upright (4) comprises an external profile (4a) fitted on an internal profile (4b) extended by a support shoe (4c) . 8. Staircase (1) according to any one of the preceding claims, characterized in that at least one upright (4) and the upper bearing (3) are connected by at least one movable locking means (9). ίο 9. Staircase (1) according to the preceding claim, characterized in that at least one movable locking means (9) comprises a compass system (10) combined with a stabilizer bar (11), the lower end of which comes s 'fit into a housing arranged in one of the uprights (4). 5 10. Staircase (1) according to any one of the preceding claims, characterized in that at least the straight flight (2) comprises at least one flat locking means (12) intended for temporary fixing in the folded position of at least the right flight (2) to at least one amount (4). 305934g 1/4 2/4