WO2020216983A1

WO2020216983A1 - Platform for work in elevator shafts

Info

Publication number: WO2020216983A1
Application number: PCT/ES2020/070268
Authority: WO
Inventors: Javier Lera Prada
Original assignee: Javier Lera Prada
Priority date: 2019-04-26
Filing date: 2020-04-27
Publication date: 2020-10-29
Also published as: ES1232990U; ES1232990Y

Abstract

The invention relates to a platform (1) for work in an elevator shaft (2), which comprises: extendable legs (3) provided with first implements (4) in the lower part, for resting on or attaching to a front crossbar (21) of the elevator shaft (2); an extendable upper work surface (6) joined to the legs (3) by means of hinged joints (7); and front extensions (60) of the work surface (6) that comprise second implements (61, 62) for resting on the bottom (20) of the elevator shaft (2), all the extendable and hinged elements having locking elements (8, 80, 800, 806).

Description

PLATFORM FOR WORKING IN ELEVATOR HOLES

OBJECT OF THE INVENTION

The present invention relates to a platform for working in elevator shafts. It belongs to the technical sector of industrial assemblies.

BACKGROUND OF THE INVENTION

The assembly of an elevator in a shaft, whether it is a construction site or a metal structure to later put an enclosure, involves significant safety risks, as they are vertical works with the risk of falling from a height.

At present scaffolding and ladders are used, resulting in scaffolding a cumbersome and expensive auxiliary equipment, which also in long elevator routes involves a considerable transport of material to the upper part of the shaft, and also occupies the entire shaft under the work area , hindering corrective work below.

As for the ladders, they are dangerous, since supports are improvised for them, which often do not offer sufficient security.

In addition, in general, the auxiliary means used in the sector for these tasks are heavy and require transport and assembly by several people, and have dimensions that often make it impossible to work in narrow shafts, such as those improvised in stairwells in rehabilitation, replacement and partial modernization works, to put or modernize lifts in old buildings that have no other space.

These drawbacks are overcome with the use of the work platform of the invention. DESCRIPTION OF THE INVENTION

The platform for working in elevator shafts of the invention comprises:

- some extendable legs provided in their lower part with first supporting or fixing implements on a front cross member of the elevator shaft (beam or slab edge), - an extendable upper work surface, joined to the legs through articulated joints ,

-Front extensions of the work surface (understood as such that they can be extended to reach the bottom of the shaft) and that comprise second implements to support the bottom of the elevator shaft (bottom wall or beam at the bottom of the shaft) , Y

- all the extensible and articulated elements having blocking elements.

In this way, there is a platform that is quickly fixed only on the level or work floor, which always has a beam or a slab edge, and the height can also be adapted thanks to the extendable legs to allow height ranges. from landing to platform base between 1 100 mm - 1700 mm, and thanks also to the extensibility of the work surface and the front extensions it can be adapted to openings of different depths (from 800 mm to 3000 mm), safely thanks to the locks of all the extensible and articulated elements, achieving a stable work surface.

In addition, thanks to this configuration, a great lightness (less than 30 kg) is achieved using the appropriate materials -thanks to its compactness- being able to be handled and transported by a single operator, with a high load capacity (up to 150 kg in use, and 600 kg in static load test performed in the most unfavorable condition of maximum extension for 2200 mm shaft depth), thus allowing one or two people to have temporary access to the lift shaft to carry out initial lift installation work in the phase of setting out the guides in the upper part of the hole. It also allows certain maintenance work to be carried out when the elevator is wedged in intermediate floors without the presence of the car on the landings, for handling cables and pulleys of the lower chassis train in 2: 1 suspension installations, and also allows temporarily attached to the upper side member in the upper part of the car chassis for the installation of guides in the intermediate phase of installation of the elevator without having to mount a cabin, reducing the load capacity of the electric traction element.

It is also valid for both hands of the stakeout, and as a condition, once supported on the bottom of the shaft, it has to form an angle from the back wall to the scaffold platform> at 90 ^e . It includes a safety railing, an indicative sign attached to the platform with abbreviated assembly instructions and model number plate.

DESCRIPTION OF THE DRAWINGS

Figure 1.- Shows a view of the platform of the invention, folded.

Figure 2. - Shows views of the platform of the invention placed in two elevator shafts with different depths, to appreciate its versatility.

Figure 3.- Shows a view of the platform of the invention placed in an elevator shaft with an independent structure.

Figures 4 and 5. - They show two detailed views of the platform of the invention.

Figure 6. - Shows a view of the placement of the platform of the invention in an upper part of an elevator shaft with an independent structure.

Figure 7.- Shows a sequence of views of the initial placement of the platform inside the hole, where it can be seen that the operator first places the structure without the trays or handrails and then the first plate and its handrails and the second plate and its handrails.

Figure 8.- Shows a bottom perspective view of the structure of the platform of the invention, without the plates of the work surface in place, where blocking elements of the extension of the beams of the work surface can be seen. and the opening between the legs and the work surface, which comprise two spindles.

Figure 9.- Shows a detailed view of a first locking spindle of the extension of the stringers of the work surface.

Figure 10. - Shows a detailed view of a second locking spindle of the opening between the legs and the work surface.

PREFERRED EMBODIMENT OF THE INVENTION

The platform (1) for working in elevator shafts (2) of the invention comprises:

- some extensible legs (3) provided in their lower part with first implements (4) for support or fixation on a front cross member (21) of the elevator shaft (2) (beam or slab edge),

- an extendable upper work surface (6), attached to the legs (3) through articulated joints (7),

-some front extensions (60) of the work surface (6) comprising second implements (61, 62) to support on the bottom (20) of the elevator shaft (2) (bottom wall or bottom beam of the shaft ), Y

- all the extensible and articulated elements having locking elements (8, 80, 800, 806).

Very preferably the extensible legs (3) comprise (see figs 3, 4 and 5):

-a fixed lower ladder (30) on which the first supporting or fixing implements (4) are arranged on the front cross member (21) of the elevator shaft (2),

-An upper extensible ladder (31), which extends from the fixed ladder (30), and in which the articulated joints (7) to the upper extensible work surface (6) are arranged,

-some first sliders (32) that are related to the lateral uprights of both ladders (30, 31), and

- extension locks (80) between both scales, with a horizontal adjustment range preferably every 50 millimeters. In this way the ladders ensure climbed access to the work surface (6) and provide means for interlocking in extension and the extension itself, of course. Ideally, the lower fixed ladder (30) has an outer width equal to or less than the inner width of the upper extendable ladder (31) to be partially accommodated in said upper extendable ladder (31) and reduce the space occupied in the folded position. In terms of dimensions, the lower fixed scale (30) preferably has a height between 1 meter and 1.20 meters (very preferably 1.10 meters) and the upper extensible scale (31) has a maximum external width of 65 centimeters for access to narrow openings (2) characteristic of existing buildings under renovation and replacement where, currently, operators of different companies around the world tend to operate from a ladder in an unsafe way to install guides.

For its part, the upper extensible work surface (6) comprises:

- fixed longitudinal beams (63) coupled to the articulated joints (7),

-extendable longitudinal beams (64) in which the front extensions (60) are telescopically connected,

-second slides (65) that are joining the fixed longitudinal beams and the extensible longitudinal beams (64), and

-An extensible set of plates (66, 67) supported (see also fig 7) on the beams (63, 64) to configure the support surface itself, which in this way extends to cover the depth of the gap (2) .

The second implements arranged at the end of the extensible longitudinal beams (64) can be for example:

- some articulated feet (61) to support the wall at the bottom of the shaft,

- some front and upper support angles (62) on beams (22) at the bottom of the hole (2) (see fig 3).

In both cases they can have extension regulation of 10 by 10 centimeters.

The extensible longitudinal beams (64) are ideally located inside the fixed longitudinal beams (63) (between them as seen in figs 5 and 7) and comprise some sleepers (68) (see fig 5) to keep their spacing and ensure good support of the plates (66, 67), the fixed longitudinal beams being connected at their ends by means of end plates (69) for the same purpose. For this specific embodiment, the locking elements for the extension of the work surface (6) may advantageously comprise (see figs 8 to 10) a first spindle (800) (which can be seen in better detail in fig 9) which is located relating at least one of the end plates (69) of the fixed longitudinal beams (63) and one of the sleepers (68) of the extendable longitudinal beams (64) of the extendable upper work surface (6) to produce, not only the blocking, but also a tightening that minimizes movements due to slack and increases safety, with the additional advantage that it serves to extend the longitudinal extensible beams (64). Preferably, said first spindle (800) comprises (see fig 9) a first threaded rod (802), a first double thread (803)

-to provide double locking security- arranged in the proximal crossbar (68) of the extensible longitudinal beams (64) of the extendable upper work surface (6), and a first opposing support sleeve (804) arranged in the end plate (69) proximal of the fixed longitudinal spars (63); the first rod (802) comprising a first machined end (805) on the opposite side of the first support bushing (804) (hexagonal in this case) for actuation by means of a tool. The distal end plate (69) of the fixed longitudinal beams (63) comprises a hole (801) (see fig 8) for the passage of the stem (802) of said first spindle (800) in folded or not fully extended positions of the extensible longitudinal beams (64).

Likewise for this embodiment, the elements for blocking the opening between the legs (3) and the work surface (6) may comprise - with the same purpose and advantages as in the case of the first spindle (800) - a second spindle (806 ) that is connecting, through articulated joints (807, 808) (see fig 10), the proximal end plate (69) of the fixed longitudinal beams (63) of the extensible upper work surface (6) and the step top (31 1) of the extendable ladder (31) top of the extendable legs (3). The use of the articulated joints (807, 808) allows the folding movements and the adjustment of the width of the opening between the legs (3) and the work surface (6). In the preferred and non-limiting example of this feature, the second spindle (806) comprises (see fig 10) a second threaded rod (809), a second double thread (810) arranged in a first articulated joint (807) fixed to the end plate (69) proximal of the fixed longitudinal beams (63) of the upper extensible work surface (6), and a second opposing support bushing (81 1) arranged on the upper rung (31 1) of the extensible ladder ( 31) top of the legs (3) extensible through a second articulated joint (808); the second rod (809) comprising a second machined end (812) (see in fig 9) on the opposite side of the second support bushing (81 1) (also hexagonal) for actuation by means of a tool. The second stem (809) also ideally comprises a distal stop (813) to prevent it from coming out of the second double thread (810). With these innovations, it is also possible to carry out the vertical deployment semi-automatically (by means of the second spindle (806)) and later the horizontal unfolding of the work surface (by means of the first spindle (800), to adapt to the bottom of the hole in each case, improving safety and avoiding the risk of falling of the personnel who carry out the tasks of introducing the platform to the elevator shaft.

The extensible set of plates comprises (see figs 5 and 7) in the preferred embodiment a first plate (66) fixed at its proximal end to the fixed longitudinal beams (63) or to its proximal end plate (69), and a second plate (67) fixed at its distal end to the extensible longitudinal beams (64) or their cross members (68), said plates (66, 67) having a length equal to or less than that of the folded work surface (6) so that they can overlap in this case and in the folded position they are gathered up favoring transport. Furthermore, provision has been made for skirting boards (70) and perimeter handrails (71) on its sides and bottom (of the work surface (6)) to prevent objects from falling from below and to secure the operators. Preferably the plates (66, 67) are independent and are removably fixed to the beams (63, 64), proximal end plate (69) or corresponding cross members (68) to facilitate positioning of the platform (1) of the invention within of the hole (2). Initially, the operator places the structure in the hole without the trays or handrails with an approximate weight of 15 Kg, eliminating weight, and therefore, reducing the risk of being able to fall into the hole due to the expiration of the weight of the platform elements . Subsequently, the first plate (66) and handrail (71) of its area will be placed from the landing and finally the second plate (67) and the handrails (71) of its area, as seen in the sequence of views in fig 7 .

As for preferred measurements, the fixed longitudinal beams (63) have a length between 75 and 85 centimeters, the extensible longitudinal beams (64) have a length between 70 and 75 centimeters, and the front extensions (60) have a length between 35 and 40 centimeters, with the fixed longitudinal beams (63) having a maximum external width of 65 centimeters, with the same wide-reaching purposes for the bottom of the hole and a reduced width for working in narrow holes.

As additional security, provision has been made for some extensible brackets (5) which are related to the legs (3) and the extendable upper work surface (6). Said extensible brackets (5) are preferably telescopic, and are removably fixed to the distal slides (32, 65) of the ladders (30, 31) and of the beams (63, 64).

To ensure the lightness of the assembly, it is preferred that it be made of aluminum or composites of the Larcore A2 type from Alucoil ®, at least one of the plates (66, 67) being able to be made of cross-linked aluminum.

The first implements (4), very preferably comprise angle plates, from one of whose planes the legs (3) emanate outwards. This allows them to be placed at the angle of a slab or beam edge, keeping the opening angle between legs (3) and work surface (6) above 90 degrees.

Furthermore, the provision of wheels (40) and handles (41) has been provided to facilitate wheeled transport in the folded position. Said (40) wheels can be arranged on the first implements (4).

Indicate that the locking elements can comprise pins (8) that interlock in holes (81) of the parts to be immobilized.

With this configuration, in addition, the same platform can be used for the mounting of guides from above the chassis, either gantry or backpack type by coupling a longer ladder kit to access from the base of the cabin, and regardless of the dimensions of elevator car and nominal load. In large elevators, several platforms can even be inserted in the shaft and in the chassis at the same time.

The structural elements are innovative by combining the technology of the portable telescopic aluminum ladders with their corresponding steps, with the extendable work platform in extruded aluminum that does not exist on the market to reduce the weight of the work tool.

Having sufficiently described the nature of the invention, it is indicated that the description of the itself and its preferred embodiment should be interpreted in a non-limiting way, and encompassing all possible variants of embodiment that may be deduced from the content of this specification and the claims.

Claims

1.-Platform (1) for working in elevator shafts (2) characterized in that it comprises:

- some extensible legs (3) provided in their lower part with some first supporting or fixing implements (4) on a front cross member (21) of the elevator shaft (2),

- some front extensions (60) of the work surface (6) that comprise second implements (61, 62) to support the bottom (20) of the elevator shaft (2), and - having all the extensible and articulated elements some locking elements (8, 80, 800, 806).

2. -Platform (1) for working in elevator shafts (2) according to claim 1 characterized in that the extensible legs (3) comprise:

- some extension interlocks (80) between both scales.

3. -Platform (1) for working in elevator shafts (2) according to any of the preceding claims, characterized in that the extensible upper work surface (6) comprises:

- fixed longitudinal beams (63) coupled to the articulated joints (7),

-an extensible set of plates (66, 67) supported on the beams (63, 64) to configure the support surface itself.

4. -Platform (1) for working in elevator shafts (2) according to claim 3, characterized in that the extensible longitudinal beams (64) are arranged inside the fixed longitudinal beams (63) and comprise sleepers (68) for keep your distance; the fixed longitudinal beams being connected at their ends by means of end plates (69).

5. -Platform (1) for working in elevator shafts (2) according to claim 4 where the locking elements comprise a first spindle (800) that is connecting at least one of the end plates (69) of the side members fixed longitudinal members (63) and one of the sleepers (68) of the extensible longitudinal beams (64) of the extensible upper work surface (6).

6. -Platform (1) for working in elevator shafts (2) according to claim 5, wherein the first spindle (800) comprises a first threaded stem (802), a first double thread (803) arranged in the proximal cross member (68) of the extensible longitudinal beams (64) of the extensible upper work surface (6), and a first opposing support sleeve (804) arranged on the proximal end plate (69) of the fixed longitudinal beams (63); the first rod (802) comprising a first machined end (805) on the opposite side of the first support sleeve (804) for actuation by means of a tool.

7. -Platform (1) for working in elevator shafts (2) according to any of claims 4 to 6 in relation to claim 2, where the locking elements comprise a second spindle (806) that is related, through of articulated joints (807, 808), the proximal end plate (69) of the fixed longitudinal beams (63) of the extendable upper work surface (6) and the upper step (31 1) of the upper extendable ladder (31) of the legs (3) extendable.

8.-Platform (1) for working in elevator shafts (2) according to claim 7 where the second spindle (806) comprises a second threaded rod (809), a second double thread (810) arranged in a first articulated joint (807 ) fixed to the proximal end plate (69) of the fixed longitudinal beams (63) of the extensible upper work surface (6), and a second opposing support bushing (81 1) arranged on the step upper (31 1) of the extensible ladder (31) upper of the legs (3) extensible through a second articulated joint (808); the second rod (809) comprising a second machined end (812) on the opposite side of the second support sleeve (81 1) for actuation by means of a tool.

9. -Platform (1) for working in elevator shafts (2) according to any of claims 3 to 8, characterized in that the extensible set of plates comprises a first plate (66) fixed at its proximal end to the fixed longitudinal beams (63 ) or its proximal end plate (69), and a second plate (67) fixed at its distal end to the extensible longitudinal beams (64) or to its cross members (68), said plates (66, 67) having a length equal to or less than that of the folded work surface (6).

10. -Platform (1) for working in elevator shafts (2) according to any of claims 3 to 9, characterized in that it comprises skirting boards (70) and perimeter handrails (71) on the sides and bottom of the work surface (6 ).

1 1. -Platform (1) for working in elevator shafts (2) according to any of claims 3 to 10, characterized in that the plates (66, 67) are independent and are removably fixed to the beams (63, 64), proximal end plate (69) or corresponding crosspieces (68).

12. -Platform (1) for working in elevator shafts (2) according to any of the preceding claims, characterized in that the second implements are selected from:

- some articulated feet (61) to support the wall at the bottom of the shaft,

- some front and upper support angles (62) on beams (22) at the bottom of the hole (2).

13. -Platform (1) for working in elevator shafts (2) according to any of the preceding claims, characterized in that it also comprises extensible brackets (5) that are related to the legs (3) and the upper work surface (6) extensible.

14.-Platform (1) for working in elevator shafts (2) according to claim 13 characterized in that the extensible brackets (5) are telescopic, and are removably attached to the distal slides (32, 65) of the ladders (30, 31) and of the beams (63, 64).

15.-Platform (1) for working in elevator shafts (2) according to any of the preceding claims, characterized in that the first implements (4) comprise angle plates, from one of whose planes the legs (3) emanate outwards.

16.-Platform (1) for working in elevator shafts (2) according to any of the preceding claims, characterized in that it comprises wheels (40) and handles

(41) to facilitate wheeled transport in the folded position.