ES2308698T3 - STAIRCASE WITH PLATFORM AND FOLDING RAIL TUBES, ESPECIALLY FOR EXTENSIBLE STAIRS. - Google Patents

Abstract

The ladder has a balustrade tube (13) associated to a lower platform (15) and including lower and upper rails (17, 19) arranged at about 0.5 mm and 1 mm from the platform, respectively. The rails form a peripheral edge articulated to an upper plane (5). The edge is connected to side legs (27) slidably connected to a post (21) in the plane. The platform is foldably mounted in an out of service folded position in which the platform and tube are brought in the ladder plane to occupy only a less volume, from a service position where the platform and tube are deployed to protect a person.

Description

Ladder with platform and railing tubes folding, especially for extendable stairs.

The invention relates to a ladder with platform and folding railing tubes, especially for sliding stairs

A ladder according to the preamble of the claim 1 is described in GB-A-2158498, AU-A-7409874 and FR-A-2632349.

Current legislation evolves in the sense to better ensure the safety of the people who work on it of stairs, in order to avoid accidents that may occur, mainly by falls, to people.

Indeed, a staircase has been proposed with platform and with at least one handrail tube according to the claim 1.

Said ladder may include side hooks by which it can be hooked on another ladder (simple or sliding), on its steps, to adapt the height of the set platform and railing tube at the desired use height.

It can be adapted on a ladder sliding, hooking it over its upper section.

It is preferably integrated in a ladder sliding, in at least two sections mounted sliding a with respect to the other, for its variable adjustment in length or in height during use, characterized in that it is provided with a platform set for the support of the person and therefore minus a railing tube for the person, mounted foldable in a folded position out of use, in which the two sections are carried one on top of the other, from a position of use in which the sections are displayed relative to each other to the desired height of the ladder, and the platform and tube assembly Railing is deployed to support and protect the user.

In this case, the platform set and of handrail tube is mounted on the upper section of the sliding ladder

The platform is advantageously constituted by a plate surrounded by a peripheral plinth, mounted articulated between the uprights of the upper section, preferably on a top step of this section, which platform in folded position arrives foldably in the plane of the upper section of the stairs and between their uprights, to allow the sliding of this upper section on the first section, and in use position is rotated at an angle suitable, being locked in a substantially horizontal position to support the user in the normal inclination of the ladder.

According to the invention, the railing tube part associated with the lower platform is constituted by a lower handrail arranged approximately 0.5 m from the platform, and by a superior handrail arranged to approximately 1 m from the platform, which handrails, which are shaped to form a peripheral edge of protection for the person, they are mounted articulated in said upper section and are connected to at least one side leg connected herself with possibility sliding to an upright of the upper section of the stairs.

Preferably, said lower handrails and upper are connected, each one, and on each side of the stairs, to a leg connected to a post in the upper section, extending both legs from top to bottom, to form a user platform access ramp, in position locked use on its upright, and to allow drag articulated handrail assembly to its folded out position of use, out of the locked position of use.

Preferably, the handrails extend in parallel, as the associated lower legs do, constituting a set of dragged articulated parallelogram during deployment by the movable lower legs.

Thus, in the folded position of the set of platform and railing tube, the platform folds into the inside the upper section to allow it to slide over the first section and the handrails are placed on top of each other with little thickness, above the upper section, being dragged with the upper section at the bottom of this section on the first.

The legs can be formed with a hole longitudinal that receives at least one blocking element of the position of use, integral with the upright, and that meshes on a stop element at least, for example, a screw, integral of the leg, in position of use.

Naturally, the ladder can receive a usual accessory at least, such as a support seat on an anterior crossbar of a railing tube, formed in V for support on a pole or a tree, and a belt or chain of tight anchor around the pole, end wheels for the bearing on a support wall, etc., preferably mounted solidarity of the railing tube in the front part of it.

In addition, the ladder advantageously receives side stabilizer legs, mounted articulated each on a stairwell and that, due to the additional weight of the set of platform and railing, and displacement of greater amplitude of the person supported with respect to a ladder Classic, provide a more rigid ladder support reducing flexion under load, laterally stabilize the ladder and avoid unpleasant swing movements of the platform.

The invention is illustrated below with the aid of embodiments and with reference to the attached drawings in which:

- Figure 1 is a perspective view of a sliding ladder provided with a set of platform and tubes handrail according to the invention in deployed position of use,

- Figure 2 is an elevation view of the ladder of figure 1 in folded position out of use,

- Figure 3 is a perspective view partial enlargement of the sliding lock device of the stair railing set,

- Figure 4 shows a variant of realization that refers to a simple staircase and that can be mounted on a classic, simple or sliding staircase.

With reference to figures 1 and 2, the ladder Slider 1 depicted includes two stair sections, respectively a lower section 3 and an upper section 5, the upper section 5 being slidably mounted on the bottom section 3 using a classic sliding device, for example by longitudinal slides 7 on the uprights of the sections, or by lateral wings (not represented) receiving the uprights of the upper section and which are in solidarity with the amounts of the lower section.

The translational drag of the upper section 5 on the lower section 3 is carried out by means of a classic pulley and rope device 9 which one stretches at will to adapt the length of the ladder to the desired use height. The height lock of the upper section 5 on the lower section 3 is carried out by means of tilting elements 11 that fold back during the rise and that engage for the blocking of the upper section 5 on the lower section 3 on the descent, or by hooks ( not shown) that catch on the rungs of the section
lower.

Top section 5 includes a set railing 13 and upper platform 15, which can be folded from an out-of-use position (figure 2), of reduced length and short thickness, to a deployed position of use, in which the platform 15 is rotated horizontally to support the person and the railing part 13 surrounds the person standing, using a lower handrail 17 and an upper handrail 19.

Platform 15 is a plate 16 surrounded by a Classic peripheral plinth 18, mounted articulated between the uprights 21 of the upper section 5 on an upper step 23 of this last. It has a width slightly less than the distance between the uprights 21 and folds parallel to the section. In position of use, rotated horizontally, retained by cables (not shown) or by sliding beams 25 connected to the uprights 21.

The lower handrail 17 arranged at 0.5 m from platform height 15 during use, is a railing U-shaped metal tubular, whose central part is extends forward.

The upper handrail 19 is a railing tubular metal with general U-shape, identical in size width to that of the lower handrail 17 but of length a bit major, and whose central part is turned backwards.

The rear opening of the lower handrail 17 allows access to platform 15 by a person uploaded on the stairs.

These handrails 17, 19 are mounted articulated by its lateral arms, essentially in its part central, each on each of the uprights 21 of the section upper, which extend to the upper level without rung to 1 m approximately height.

The handrails are connected on their part posterior to two parallel side legs 27, articulated them same on each side of the stairs, each one in a stile 21 of the upper section. These side legs 27 are mounted sliders from top to bottom, each on a stile 21 of upper section of stairs, and connect the lower handrails 17 and upper 19 according to an articulated parallelogram set. The handrails 17, 19 are dragged in this way in parallel between yes, from a folded position, where one is located above the another (figure 2), to a deployed position of use (figure 1) in the which are horizontal, with an average stair inclination of 70º (normal use).

In this position of use, the legs 27 form also an access ramp to platform 15.

The legs 27 slide through each of its lower end (figure 3) on a support piece 29 fixed to the upright 21 and which includes a locking leg 31 articulated on the axis 33 through which the leg slides through a groove complementary lower 35, engaging leg 31 to lock in position of use by a notch part 37 on a protruding part at the end of the groove, for example a screw 39, arranged in the leg end

Notch 37 is tilted down and prevents during use the leg of the notch is released.

The release is done by lifting the leg of lock 31, releasing it from notch 37, which allows the sliding the legs 27 down on its support piece 29.

The ladder also includes elements accessories, such as articulated stabilizer legs 41 laterally each on an upright of the lower section 3, an upper support seat 43 on a crossbar front of the upper handrail 19, equipped with wheels and belts clamping or anchoring to the wall or upper support element of the ladder, of the lower feet 45 with height adjustment, etc.

The operation will now be described.

Starting from the folded position of the ladder, Figure 2, where the upper section 5 is arranged down on the lower section 3, and the platform 15 and tube assembly railing 13 is folded along the upper section 5, the set can be held in position by straps (no represented) tied around the uprights and legs of the sections, it is about removing said straps, of putting the ladder to the desired length of use, sliding the upper section 5 on the lower section 3, by means of a traction on the rope of the slide device 9 and of lock the position supporting the tooth tilting elements 11 positioning on a lower section step adequate. Platform 15 then falls into position, with the tilt ladder horizontally, retained by the bielitas 25, as soon as it exceeds the steps of the lower section 3. Then the drag legs 27 of the handrails are pushed and these They unfold horizontally. Legs 27, at the end of the race  Sliding they place themselves in locked position, thanks to the locking legs 31 on the screws 39 that protrude from the legs. Then the ladder tilts at its angle of normal use, approximately 70º, by application of the face front of the upper handrail 19 on the support wall or support element (post). The legs are then arranged lateral stabilizers 41 in support, separated on the ground. In At this time, the ladder is ready for use and the operator access the support platform 15, helping with the legs 27 that They form the access ramps. The operator enters the inside the lower handrail 17, then in the upper handrail 19 until you reach platform 15. At this time, the stairs effectively supports and protects the operator, both in one position crouched by the lower handrail 17, as in a standing position, being held by the upper handrail 19, allowing a wide movement displacement for your work at height, and with a rigid support of the ladder, especially by the bars lateral stabilizers 41.

Figure 4 shows a variant embodiment relative to a simple staircase equipped with a device with platform 15 'and railing 13' foldable according to the invention. He device with platform 15 'and railing 13' presents by example the same elements as the device with platform 15 and railing 13 described above. The simple 1 'ladder can then constitute an upper section 5 of a sliding ladder as defined above.

This simple 1 'ladder is provided with side hook elements 47 at the lower level, two hook elements 47 fixed on each side on each stud 49 of ladder, and on the first and third bottom steps 51, respectively. This simple 1 'ladder fits over another classic, simple or sliding staircase (of greater or equal width) and can be hooked on it at the desired height of use (platform and railing), usually in a single position on the sliding section of the ladder to the upper level by hooking of its elements hooks 47 on the steps of the lower ladder

The different embodiments described can be adapted to one or the other of the sliding stairs or simple described with reference to figures 1 and 4.

The invention thus provides a ladder with platform and folding railing tubes, for a situation adjustable and easy and with a safe and comfortable use for operator.

Claims (11)

1. Ladder (1, 1 ') with platform and with at least one railing tube, provided with a platform set (15, 15') to support a person, and with at least one railing tube (13, 13 ' ) for the supported person, said ladder including an upper section (5) and a lower section (3), said folding assembly being mounted in a foldable position out of use, in which the platform (15, 15 ') is carried in the plane of the ladder (1, 1 ') and the railing tubes (13, 13') are carried against the plane of the ladder (1, 1 ') to occupy only a small space, from a position of use in which the platform assembly (15, 15 ') and railing tube (13, 13') is deployed to support and protect the user, characterized in that the part of railing tube (13) associated with the lower platform (15) is constituted by a handrail lower (17) arranged approximately 0.5 m from the platform (15) and by an upper handrail (19) arranged approximately 1 m of the platform (15), which handrails (17, 19) formed to form a peripheral edge of protection for the person, are mounted articulated in said upper section (5) and are connected to at least one side leg (27), which is connected with the possibility of sliding, to an upright (21) of the upper section (5) of stairs. 2. Ladder (1) according to claim 1, characterized in that said lower (17) and upper (19) handrails are each connected, and on each side of the ladder, to a leg (27) connected to a stud (21) of the upper section (5), extending the two legs (27) from top to bottom to form a platform access ramp (15) for the user, in a locked position of use on its upright (21), and allow the articulated drag of the handrail assembly (17, 19) to its folded position out of use, out of the locked position of use. 3. Ladder (1) according to one of claims 1 and 2, characterized in that the handrails (17, 19) extend parallel and as do the associated lower legs (27), which constitute a set of articulated parallelogram dragged for deployment by the movable lower legs (27). 4. Ladder (1) according to one of claims 1 to 3, characterized in that the legs (27) are formed with a longitudinal hole (35) that slidably receives at least one locking element (31) of the position of use, fixed of the upright (21) and meshed on at least one stop element, for example, a screw (39), integral with the leg (27) in the position of use. 5. Ladder (1 ') according to one of the preceding claims, characterized in that it includes side hooks (47) by which it can be hooked onto another ladder (simple or sliding) on the steps of said other ladder, to adapt the height of the assembly platform (15 ') and railing tube (13') at the desired height of use. 6. Ladder (1 ') according to claim 5, characterized in that it can be adapted on another sliding ladder, engaging it on the upper section of said other sliding ladder. 7. Ladder (1) according to claim 1, which includes at least two sections (3, 5) slidably mounted to each other, for variable adjustment in length or height during use, characterized in that it is provided with a platform assembly (15) to support the person and at least one railing tube (13) of the person, said assembly being assembled in a foldable way in a position outside folded use, in which the two sections (3, 5) are carried one above the other, from a position of use in which the sections (3, 5) are deployed with respect to each other at the desired height of the ladder and the platform assembly (15) and railing tube (13) is deployed to support and protect the user. 8. Ladder (1) according to claim 7, characterized in that the platform (15) and railing tube assembly (13) is mounted on the upper section (5) of the ladder. 9. Ladder (1) according to claim 7 or 8, characterized in that the platform (15) is constituted by a plate (16) surrounded by a peripheral plinth (18), said plate (16) being mounted articulated between the uprights (21) ) of the upper section (5), preferably on a step (23) of said section, which platform (15), in a folded position, arrives foldably in the plane of the upper section (5) of the ladder and between its uprights (21) to allow the sliding of this upper section on the first section (3), and in use position it is rotated at a suitable angle, being locked in a substantially horizontal position to support the user in the normal inclination of the ladder. A ladder (1, 1 ') according to one of the preceding claims, characterized in that it receives at least one conventional accessory such as a support seat (43) on a crossbar in the front part of a railing tube, formed in V for its support on a post or a tree, and a belt or anchor chain tight around the post, end wheels for the bearing on a support wall, etc., preferably mounted integral with the railing tube in the front part of the latter. . 11. Ladder (1, 1 ') according to one of the preceding claims, characterized in that it includes lateral stabilizing legs (41), mounted articulated on a staircase, and which, due to the additional weight of the platform and railing assembly and the displacement of greater amplitude of the person supported with respect to a conventional ladder (simple or sliding), they provide a more rigid support of the ladder, reducing flexion under load, stabilize the ladder laterally and avoid unpleasant oscillation movements of the platform.