EP2144836B1 - Stair lift - Google Patents

Abstract

The present invention relates to a stair lift (1) for overcoming height differences (D) formed by at least two height levels (N1, N2). The stair lift (1) comprises at least one lift platform (HP, HP1, HP2) and at least one stair body (TK, TK1, TK2). The stair platform (HP, HP1, HP2) and the platform surface (PF, PFl, PF2) can be moved between at least two states. In said states, the respective platform surface (PF, PFl, PF2) is vertically flush with a first level (N1) or a second level (N2). Using sliding steps (S, S1-S6) and a coupling (K) to the respective lift platform (HP, HP1, HP2) and to the movement of the platform surface (PF, PFl, PF2), either a staircase (TL) connecting the levels (N1, N2) or a surface (TF) that is vertically flush with one of the levels (N1, N2) and the platform surface (PF, PFl, PF2), is formed.

Description

The present invention relates to a lifting staircase or more generally a lifting device - with staircase function - to overcome at least two height levels given height differences. In particular, the invention also relates to a lifting staircase for overcoming staircases without time interruption of the staircase function.

For entrances, exits and exits in and of buildings and buildings in general, as well as in and of parts of buildings or parts of buildings, stairs are often used to enable people to overcome differences in height as simply as possible due to different levels or levels within a building or structure or in the area of their entrances and exits. A basic requirement for the trouble-free use of a staircase is a corresponding physical efficiency and the absence of other obstacles or burdensome reasons.

The use of stairs is therefore difficult, if not impossible, when e.g. Be transported, vehicles or other means of transport to be used or persons using the use of a staircase due to lack of physical conditions, e.g. disability is unreasonable.

Although many opportunities have been created that allow bypassing the stairs and still manage to overcome the given height differences. A disadvantage of such known methods is that they can often be difficult to integrate into the given architectural or usage concept of the building, are spatially, technically and / or cost comparatively expensive and beyond the otherwise usual use of a building Zuzu -ab- or Interfere with transition, if eg the usual public traffic is stopped or impeded by these additional facilities.

The WO 94/00373 A discloses a combined stair and lifting device in which on a staircase a platform is mounted, which can be raised via a lifting mechanism and remains aligned horizontally. However, the staircase body with a fixed length on a circular arc pivoted, so that this known device can not be used in structural environments where it requires a special spatial flexibility.

The invention is based on the object to provide a lifting device and in particular a lifting staircase, which makes it possible in a comparatively simple and reliable manner, height differences given by height levels, e.g. to overcome in additions, departures or transitions on and in buildings, in particular a present stair function is guaranteed without time interruption.

The object underlying the invention is achieved in a lift staircase with the features of independent claim 1. Advantageous developments the lifting staircase according to the invention are the subject of the respective dependent claims.

Within the meaning of the invention, in the context of the disclosure, a hoisting device is generally used to overcome a height difference given by at least two height levels. It is in particular a lifting staircase or a lifting device, which in addition to the lifting function has the property to provide a staircase that forms in certain states that can take the lift stairs, a staircase, with the help in the usual manner and function a staircase a height difference between two height levels can be overcome. In the event that the use of a staircase just out of the question, bypassing the staircase is made possible by the fact that a Hubpodest is provided with a corresponding lifting function, on the podium surface, a load or a passer - possibly automatically and in a controlled manner and Way - can overcome the existing height difference.

It is therefore always spoken in this context of the usual elements of a staircase, in particular the so-called staircase, so the overall arrangement of commonly referred to as steps elements to overcome a difference in height between two given height levels of a pedestal or landing, which interrupts the flight of stairs or - possibly as a continuation of the so-called exit step or last upper step - this completes the so-called appearance, namely the horizontal upper surface of a step, and the so-called riser or pitch, namely the vertical component between two appearances.

The present invention proposes a lifting staircase or more generally a lifting device for overcoming a height difference given by at least two height levels, with at least one lifting platform and with at least one stair body, the Hubpodest having a pedestal, which is movable between two states, wherein the pedestal surface in the first state is flush with the first level and in the second state with the second level, wherein the staircase body has a link stage or a plurality of link stages and wherein the link stages are coupled via an intended coupling to the Hubpodest and the movement of the pedestal surface such that the stage scenes have ascended in one of the states and run the stairs connecting the levels and in the other of the states and form a flush with one of the levels and the platform surface vertically flush surface.

The stages provided have as gate stages in particular the properties that they - if they are sunk or retracted or ascended, ie during of the actual movement process - do not change their structure and their inclination and at any time have a uniform climbing measure.

Fig. 1A - C

sind schematische und geschnittene Seitenansichten zur Erläuterung einer ersten Ausführungsform der erfindungsgemäßen Hubtreppe mit einem Hubpodest und einem Treppenkörper.

Fig. 2A - C

sind schematische und geschnittene Seitenansichten einer anderen Ausführungsform der erfindungsgemäßen Hubtreppe mit zwei Treppenkörpern und einem dazwischen vorgesehenen Hubpodest.

Fig. 3A - C

sind schematische und geschnittene Seitenansichten einer Ausführungsform der erfindungsgemäßen Hubtreppe mit zwei Hubpodesten und einem dazwischen vorgesehenen Treppenkörper.

Fig. 4A - 10B

zeigen in schematischer und geschnittener Seitenansicht Varianten der Ausführungsform der erfindungsgemäßen Hubtreppe aus den Fig. 2A - C.

Fig. 11A, B

zeigen Geländeranordnungen, welche der Steigung eines Treppenlaufs folgen können und bei einer erfindungsgemäßen Hubtreppe eingesetzt werden können.

Fig. 12A, B

zeigen Geländeranordnungen, welche der Steigung eines Treppenlaufs folgen können und bei einer erfindungsgemäßen Hubtreppe eingesetzt werden können.

Fig. 13A - 17D

zeigen in schematischer, teilweise geschnittener oder isometrischer oder Draufsicht andere Varianten der Ausführungsform der erfindungsgemäßen Hubtreppe gemäß den Fig. 2A bis 2C.

Fig. 18A - C

zeigen in schematischer und geschnittener Seitenansicht Details einer Ausführungsform der erfindungsgemäßen Hubtreppe mit wechselnder Steigrichtung für den Treppenkörper.

Fig. 19A, B

zeigen in schematischer und isometrischer Seitenansicht eine Variante der Ausführungsform der erfindungsgemäßen Hubtreppe aus den Fig. 1A - 1C.

Fig. 20A - C

zeigen in schematischer und isometrischer Seitenansicht eine Variante der erfindungsgemäßen Hubtreppe gemäß der Ausführungsform aus den Fig. 3A - 3D.

Fig. 21

zeigt in schematischer und geschnittener Seitenansicht eine Variante der erfindungsgemäßen Hubtreppe, und zwar belegt mit Blockstufen.

Fig. 22

zeigt in schematischer Form mögliche Anzeigesymbole, die beim Betrieb verwendet werden können.

These and further aspects will be explained in more detail below with reference to the attached figures:

Fig. 1A - C

are schematic and sectional side views for explaining a first embodiment of the lifting staircase according to the invention with a Hubpodest and a staircase.

Fig. 2A - C

are schematic and sectional side views of another embodiment of the lifting staircase according to the invention with two staircases and a lifting platform provided therebetween.

FIGS. 3A-C

are schematic and sectional side views of an embodiment of the invention elevating staircase with two Hubpodesten and a staircase provided therebetween.

FIGS. 4A-10B

show in a schematic and sectional side view of variants of the embodiment of the lifting staircase according to the invention from the Fig. 2A - C ,

Fig. 11A, B

show railing arrangements, which can follow the slope of a flight of stairs and can be used in a lifting staircase according to the invention.

Fig. 12A, B

show railing arrangements, which can follow the slope of a flight of stairs and can be used in a lifting staircase according to the invention.

Figs. 13A-17D

show in schematic, partially sectioned or isometric or plan view of other variants of the embodiment of the lifting staircase according to the invention according to the Fig. 2A to 2C ,

Figs. 18A-C

show in a schematic and sectional side view details of an embodiment of the invention elevating staircase with changing climbing direction for the staircase.

Fig. 19A, B

show a schematic and isometric side view of a variant of the embodiment of the lifting staircase according to the invention from the Fig. 1A - 1C ,

Figs. 20A-C

show a schematic and isometric side view of a variant of the lift staircase according to the invention according to the embodiment of the Fig. 3A - 3D ,

Fig. 21

shows a schematic and sectional side view of a variant of the lifting staircase according to the invention, namely occupied with block stages.

Fig. 22

shows in schematic form possible display symbols that can be used in the operation.

Structurally and / or functionally similar or comparable elements will be described below with the same reference numerals, without a detailed description being given in written form in each case. Also, all features, as described above or below, can be combined with each other.

• Dabei wird zur Erläuterung des technischen Hintergrunds eine Hubtreppe 1 oder ganz allgemein eine Hubvorrichtung zur Überwindung eines durch mindestens zwei Höhenniveaus N1, N2 gegebenen Höhenunterschieds D gezeigt, mit mindestens einem Hubpodest HP, HP1, HP2 und mit mindestens einem Treppenkörper TK, TK1, TK2, wobei das Hubpodest HP, HP1, HP2 eine Podestfläche PF, PF1, PF2 aufweist, welche zwischen zwei Zuständen bewegbar ist, wobei die Podestfläche PF, PF1, PF2 im ersten Zustand mit dem ersten Niveau N1 und im zweiten Zustand mit dem zweiten Niveau N2 vertikal bündig abschließt, wobei der Treppenkörper TK, TK1, TK2 eine Kulissenstufe S oder eine Mehrzahl Kulissenstufen S1-S6 aufweist und wobei die Kulissenstufen S, S1-S6 über eine vorgesehene Kopplung K an das Hubpodest HP, HP1, HP2 und an die Bewegung der Podestfläche PF, PF1, PF2 derart gekoppelt sind, dass die Kulissenstufen S, S1-S6 in einem der Zustände aus- oder aufgefahren sind und einen die Niveaus N1, N2 verbindenden Treppenlauf TL, TL1, TL2 bilden und im anderen der Zustände eingefahren sind und eine mit einem der Niveaus N1, N2 und der Podestfläche PF, PF1, PF2 vertikal bündig abschließende Fläche TF bilden.

In the following, reference will be made in general to the figures:

• To illustrate the technical background, a lifting staircase 1 or, more generally, a lifting device for overcoming a height difference D given by at least two height levels N1, N2 is shown, with at least one lifting platform HP, HP1, HP2 and at least one stair body TK, TK1, TK2, wherein the Hubpodest HP, HP1, HP2 has a pedestal PF, PF1, PF2, which is movable between two states, wherein the pedestal surface PF, PF1, PF2 in the first state with the first level N1 and in the second state with the second level N2 vertically flush, wherein the staircase body TK, TK1, TK2 a slide stage S or a plurality of slide stages S1-S6 and wherein the slide stages S, S1-S6 via an intended coupling K to the Hubpodest HP, HP1, HP2 and to the movement of the pedestal PF, PF1, PF2 are coupled such that the gate stages S, S1-S6 are in one of the states off or driven up and one the levels N1, N2 verbin Forming staircase TL, TL1, TL2 and in the other of the states are retracted and form one with one of the levels N1, N2 and the pedestal PF, PF1, PF2 vertically flush surface TF.

The coupling K, K1, K2 can be a mechanical coupling.

The coupling K may in particular be or have a parallelogram linkage or a linkage with telescopic rods and rotatable sliding sleeves or a combination of these elements.

By contrast, the present invention proposes a lifting staircase 1 or, more generally, a lifting device for overcoming a height difference D given by at least two height levels N1, N2, namely for overcoming staircases without time interruption of the staircase function, with at least one lifting platform HP, HP1, HP2 and at least one stair body TK, TK1, TK2, wherein the Hubpodest HP, HP1, HP2 has a pedestal PF, PF1, PF2, which is movable between two states, the pedestal PF, PF1, PF2 in the first state with the first level N1 and in the second state is flush with the second level N2 vertically, wherein the staircase body TK, TK1, TK2 has a link stage S or a plurality of link stages S1-S6 and wherein the link stages S, S1-S6 via an intended coupling K to the Hubpodest HP, HP1, HP2 and the movement of the pedestal PF, PF1, PF2 are coupled such that the slide stages S, S1-S6 in one the states are off or ascended and form the levels N1, N2 connecting staircase TL, TL1, TL2 and retracted in the other of the states and one with one of the levels N1, N2 and the pedestal PF, PF1, PF2 vertically flush surface TF form, wherein the coupling K, K1, K2 is a mechanical coupling with or from at least one scissors linkage, which is free in its length, that is variable.

The coupling K, K1, K2 can cause a uniform gradient of the steps and a horizontal alignment of the scenes of the slide stages S, S1-S6 in the states and in particular during the movement between the states.

Achieving a smooth slope of the steps and the horizontal alignment of the gait is important in the event of a malfunction during the movement.

The coupling K, K1, K2 can be or have a parallel guidance for the slide stages S, S1-S6.

There may be provided two staircase TK1, TK2 with a Hubpodest HP in between.

On the other hand, one, two or even more staircase bodies can be provided per platform. It is conceivable, for example, a case with three staircases 1, 2, 3: Stairs 1 encounters a transversely running or transversely lying corridor, the replacement stairs 2 and 3 then lead eg in both directions of the hallway. Or: Staircase 1 in a bevelled house corner is replaced by two staircases 2 and 3, which bend at 45 degrees, into both building directions.

It is conceivable in situations that are described only for explanation as a technical background - namely, in the case of only a slight difference in height - that no staircase is provided. It is then sufficient in such a case that with the control (call button, traffic light, monitoring the door, automatic return to a starting position, etc.) only the Hubpodest is moved, possibly still existing railings, lighting and / or warning devices.

In the first state, the lifting platform HP and the first staircase TK1 can form a common and vertically flushing surface TF1 with the upper level N1 and the second staircase TK2 forming a staircase TL2 connecting the lower level N2 and the pedestal area PF on the upper level N1.

In the second state, the lifting platform HP and the second staircase TK2 can form a common and vertically flushing surface TF2 with the lower level N2, and the first staircase TK1 form a staircase TL1 connecting the pedestal HP on the lower level N2 and the upper level N2.

There may be two Hubpodeste HP1, HP2 provided with a staircase TK in between.

The link stages S, S1-S6 can be coupled mechanically via the mechanical coupling K to the first and second lifting platforms HP1, HP2, the pedestal areas PF1, PF2 and their movement.

In states in which the lifting platforms HP1, HP2 with their landing surfaces PF1, PF2 are vertically at the same level, the staircase body TK can form a common and vertically flushing surface TF with the platform surfaces PF1, PF2 and the respective level N1, N2 ,

In states in which one lifting platform HP1, HP2 with its pedestal area PF1, PF2 is at one of the levels N1, N2 and the other lifting platform HP2, HP1 with its pedestal area PF2, PF1 is at the other level N2, N1 the staircase body TK form a flight of stairs TL connecting the respective lower level N2 and the platform surface PF1, PF2 of the lifting platform HP1, HP2 on the upper level N1.

The mechanical coupling K, K1, K2 can attack the staircase body TK, TK1, TK2 respectively on or at the bottom of the elements forming the appearance of the respective slide stage S, S1-S6.

The mechanical coupling K, K1, K2 can act on or at the bottom of the element forming the pedestal PF, PF1, PF2.

The mechanical coupling K, K1, K2 may be provided underfloor and be concealed from the top of the podium surfaces PF, PF1, PF2 and the scenes S, S1-S6 forming elements or be.

It is also conceivable an arrangement above ground, in which case in particular a housing of the coupling can be made enclosed in body panels.

For moving a lifting platform HP, HP1, HP2, a lifting device HE can be formed.

The lifting device HE can be designed as a scissor lift, as a hydraulic ram, as a pneumatic ram, as a spindle drive or as a cable.

The lifting device HE can be arranged and designed such that a respective lifting platform HP, HP1, HP2 and the respective platform surface PF, PF1, PF2 with a direction of movement parallel to the orientation and orientation of the risers forming elements of the slide stages S, S1-S6, in particular parallel to an undercut of the slide stages S, S 1-S6, are movable.

A staircase TK, TK1, TK2 and in particular their slide stages S, S1-S6 and / or a Hubpodest HP, HP1, HP2 and their landing pads PF, PF1, PF2 may have handrails HL.

The handrails HL can be assigned to a respective slide stage S, S1-S6 and / or a respective pedestal surface PF, PF1, PF2 and can be designed to be individually movable along with the respective elements during the movement between different states.

At least one additional intermediate state may be provided, in which a lifting platform HP, HP1, HP2 is movable and can be held at a level between the lower level N2 and the upper level N1.

• Zweck der Hubtreppe oder allgemein der Hubvorrichtung ist die Überwindung von Differenzstufen für Personen und/oder Lasten, die nicht oder nur schwer über Stufen bewegt werden können.

These and other aspects also emerge from the following further explanations:

• The purpose of the lifting staircase or generally the lifting device is the overcoming of differential levels for people and / or loads that can not or only with difficulty be moved over steps.

• Umwege, Hintereingänge,
• Rampen, oft das Erscheinungsbild des Gebäudes störend, sehr lang wegen 6 % maximaler Steigung (z.B. 3 Stufen ä 18 cm = 54 cm: 6 % = 9 m Rampenlänge), oder zu steil ausgebildet und damit ohne Hilfestellung, allenfalls als Fluchtrampe zu benutzen,
• Differenzlifte (Durchlader) mit eigenem Platzbedarf,
• Treppenlifte, auch im Außenbereich, die anstelle einer Sitzgelegenheit eine Ladefläche bieten (quasi ein Lastenschrägaufzug), ästhetisch unbefriedigend oder
• Kräne.

The overcoming of differential stairs currently happens conventionally over

• Detours, back entrances,
• Ramps, often disturbing the appearance of the building, very long because of 6% maximum slope (eg 3 steps of 18 cm = 54 cm: 6% = 9 m ramp length), or too steep and thus without assistance, if necessary to use as an escape ramp,
• Differential lifts (through loaders) with their own space requirements,
• Stairlifts, also in the outdoor area, which offer a loading area instead of a seat opportunity (quasi an inclined load lift), aesthetically unsatisfactory or
• Cranes.

In one embodiment of the invention, an adjoining a flight of stairs surface or a lifting platform by means of any lifting device (scissor lift / hydraulic ram / pneumatic ram / spindle operation / cable) is moved vertically or substantially vertically. It goes through a mechanism of the barrier forming flight of stairs to a newly passable level together or instead unfolds no / one / more replacement runs from a previously just adjacent to the Hubpodest area. The user then advances to the just reachable lifting platform, then the system returns to its original position. The barrier has been overcome: Figs. 4A to 4D ,

On runs with undercutting steps, the lifting platform does not move quite vertically, but in a direction parallel to the undercut: FIGS. 5 and 6 ,

In Figs. 7A to 8D the scissors K are shown separately.

• im Ganzen über eine Mechanik mitbewegt (Fig. 11A - 12B),
• als stufenweise Elemente mitgefahren (Fig. 10A, B) oder
• für beide Haltestellen starr ausgelegt (Fig. 9A, B).

If handrails are provided, they will either be

• as a whole moved by a mechanism ( Figs. 11A-12B )
• as incremental elements ( Fig. 10A, B ) or
• rigidly designed for both stops ( Fig. 9A, B ).

Lighting and warning devices (flashing light) can be integrated in the handrails.

The Hubpodest can also approach three or more stops, if the runs or staircases in the resting state are very flat (up to 10 cm slope): Figs. 13A to 13C ,

The lift staircase can be used wherever the pedestrian traffic for a certain time, e.g. can be interrupted or disturbed for 20 seconds or a strip of stairs about 1 m wide is temporarily unnecessary.

It allows the passenger to use the same access as the able-bodied public (important, for example, for the appreciation of handicapped customers).

It has no own space requirement (see difference lift) and can thus be integrated into existing buildings and monuments, existing entrance doors and wind catches are used.

At rest, it does not appear, except for Rufsäulen (key / button / remote control).

It offers (except the operator waives) always a spare stairs, even in case of failure, that the lifting device is blocked between the stops.

• Hauseingänge von Ärztehäusern, Läden (dort auch Nutzung für Lastentransport), Windfänge von Gastwirtschaften.
• Freitreppen historischer Gebäude (Fig. 19).

Possible locations of use may be, for example:

• House entrances of medical centers, shops (there also use for freight transport), wind catches of inns.
• Stairways of historic buildings ( Fig. 19 ).

An assembly with block levels is possible and in Fig. 21 indicated. The system is installed correspondingly deeper.

The dimensions of the footprint on the lifting platform depend on the requirements of public disability routes or private needs, the form according to the floor plan of the building and the directions of the runs.

The step mechanism is either underfloor ( Fig. 4A - D ) arranged with a space requirement of approx. 50 cm in the depth, or (eg on Tiefgaragendecken) overground ( Figs. 14A-D ) with a space requirement of approx. 25 cm in the depth and laterally approx. 20 cm each in addition to the desired clear passage width.

The design principle is scissors or rods or a combination of both. However, it is conceivable, for example, any entrained mechanics, the (1) the arrangement moving steps along a uniform slope and (2) can cause the horizontal steps of the treads.

The cheapest and most reliable option is the pair of scissors. In double or staggered order, it does both tasks: Figs. 15A-C ,

In another embodiment, which is described for technical background - eg incomplete pyramidal staircase - can additionally be the arrangement (1) by linkage or telescopic rods with rotatable sliding sleeves or joints, the alignment (2) and guide laterally in grooves or from below telescopic poles: Figs. 16A-17D ,

A time-typical possibility would be in another embodiment, which is described in the technical background, the abandonment of a mechanism connecting the stages, instead of the individual movement of each stage by its own drive, e.g. hydraulic or pneumatic lifting pistons - but this is u.U. difficult to tune and adjust: each stamp has to travel a different path in the same time. However, this can be usefully used in heavily coiled runs. A strictly mechanical coupling of the steps can then be replaced by an individual electronic control.

1. a) Fig. 18A - C zeigen eine Möglichkeit des Einsatzes bei einer sich ändernden Steigrichtung. Die Schere sieht geringfügig anders aus, weil sie wegen der wechselnden Steigrichtung an jeder Trittstufe zwei Setzstufen ausweichen muss. Für die theaterspezifischen Erfordernisse kann eine leicht zerlegbare Konstruktion angeboten werden, weil je nach Abstand der beiden Hubpodeste einmal mehr oder einmal weniger Stufen benötigt werden. Fig. 18A - C zeigen die Ausführung mit je zwei Setzstufen pro Tritt zum Einsatz bei wechselnder Steigrichtung.
2. b) Fig. 20A - 20C zeigen eine Platz sparende Umrüstung einer nicht notwendigen Treppe: der Austritt wird abwärts bewegt wie beschrieben, ist jedoch deutlich kürzer, der nun eingeebnete Lauf ist die Aufstellfläche für den Rollstuhl, Antritt und Austritt bewegen sich samt Lauf als eine Fläche aufwärts, nach Räumung bewegt sich der Antritt abwärts und fährt die Stufen wieder auf; diese Variante ist zwischen zwei Schranken und Präsenzmeldern vorstellbar, zudem muss durch geeignete Regelungstechnik sichergestellt sein, dass sich die beiden Hubpodeste synchron bewegen können.

The same mechanism can also be used between two lifting platforms, eg also on theatrical stages:

1. a) Figs. 18A-C show a possibility of use in a changing climbing direction. The scissors looks slightly different, because they have to avoid two risers because of the changing climbing direction at each step. For the theater-specific requirements, an easily dismountable construction can be offered, because depending on the distance between the two lifting platforms once more or less stages are needed. Figs. 18A-C show the version with two risers per step for use in changing climbing direction.
2. b) Figs. 20A-20C show a space-saving conversion of an unnecessary staircase: the exit is moved downwards as described, but is much shorter, the now leveled barrel is the footprint for the wheelchair, entrance and exit move along with run as an area up, after eviction moves go down and start the stairs again; This variant is conceivable between two barriers and presence detectors. In addition, suitable control technology must ensure that the two lifting platforms can move synchronously.

In the following, reference will be made in detail to the figures:

The Fig. 1A to 3C show some basic ideas of the present invention. There are three basic structures to bear.

The first basic structure for the lifting device or elevating staircase 1 according to the invention consists of a combination of a lifting platform HP with only one staircase, as shown in the Fig. 1A to 1C is shown in a schematic and sectional side view.

Starting from this basic structure, further elements can then be added. Thus arises the arrangement, which in the Fig. 2A to 2C is shown, if one provides two staircase TK1 and TK2, between which then a single Hubpodest HP is formed. On the other hand, starting from the structure of the Fig. 1A to 1C another Hubpodest be provided, so that in the Figs. 3A to 3C shown arrangement with two Hubpodesten HP1, HP2 and a staircase body TK provided therebetween arises.

For the arrangements to be discussed below, the following elements are assumed: Two horizontal planes E1 and E2 define a first or upper level or level N1 and a second or lower level or level N2. The levels N1 and N2 have a height difference D, which according to the invention is to be overcome in the simplest possible way. For this purpose, different elevators 1 are provided, which can also be referred to as a lifting device in general. By way of illustration, a load L is always shown, which should overcome the height difference D between the levels N1 and N2.

A particularly simple embodiment of the lifting staircase according to the invention is in the Figs. 1A and 1C shown. The elevating staircase 1 from the Fig. 1A to 1C consists of a lifting platform HP with a pedestal PF and only one staircase TK with three stages or S1, S2 and S3. The load L is to be transported from the level E1 of the level N1 in the simplest possible way to the level E2 of the level N2.

This is done according to Fig. 1A the arrangement of the lifting staircase 1 is set so that the pedestal surface PF of the lifting platform HP is flush vertically with the first or upper level N1 and its plane E1. By a corresponding coupling of the stair body TK to the Hubpodest HP and the pedestal PF and their movement, the steps or slide stages S1, S2, S3 are extended, so that a staircase TL arises from the first or upper level N1, here represented by the pedestal PF. goes down to the lower level N2 and the lower level E2. In the in Fig. 1A shown state can therefore by a pedestrian height difference D from the upper level N1 to the lower level N2 and vice versa.

In the transition to the state of Fig. 1B Then the load L is transferred from the plane E1 on the pedestal PF of the lifting platform HP.

After that, in transition to Fig. 1C lowered the Hubpodest HP with the pedestal PF so that the latter moves from the level N1 of the upper level E1 to the second or lower level N2 of the plane E2 and vertically flush with this. By the coupling of the stair body TK and its stages S1, S2, S3 to the Hubpodest HP and the pedestal PF with their movement, the steps S1, S2, S3 of the staircase TK are retracted, so that the staircase body TK forms a surface TF on The second or lower level N2 of the lower level E2 and flush with the there terminating pedestal PF of Hubpodests HP also vertically flush, so that then the load in a simple manner from the pedestal PF on the surface TF of the retracted staircase TK to the second and lower level E2.

The variant according to the Fig. 1A to 1C can in the state according to Fig. 1C can not be easily used by a pedestrian to overcome the height difference D between levels N1 and N2. This problem is resolved by the provision of an additional second staircase body.

The arrangement of Fig. 2A to 2C shows a schematic and sectional side view of an embodiment of the lifting staircase 1 according to the invention, in which between a first staircase TK1 and a second staircase TK2 a Hubpodest HP is formed.

In the in Fig. 2A shown first state, the Hubpodest HP is extended to the first or upper level N1 of the first or upper level E1, so that the pedestal surface PF of the lifting platform HP is flush vertically with the first or upper level N1 of the first or upper level E1. About the mechanical coupling K of the first staircase TK1 to the Hubpodest HP, whose pedestal PF and their movement are the steps S1, S2, S3 of the first staircase TK1 in retracted form, so that a flat surface TF1 forms, which is flush with vertically the pedestal surface PF1 and the first or upper level N1 of the first or upper level E1 concludes. Via a corresponding mechanical coupling K2 of the second staircase TK2 to the Hubpodest HP, whose pedestal PF and their movement are the steps S4, S5, S6 of the second staircase TK2 ascended and form a flight of stairs TL2, which the pedestal PF with the second or lower level N2 of the second or lower level E2 connects.

In this way, on the one hand, the load L provided in the region of the plane E1 can be conveyed over the surface TF1 of the first staircase TK1 onto the pedestal surface PF of the lifting platform HP. At the same time, on the other hand, the height difference between the first or upper level N1 of the first or upper level E1 and the second or lower level N2 of the second or lower level E2 by a pedestrian in a known and simple manner by using the staircase TL2, which from second staircase TK2 is formed, overcome.

In the transition to the in Fig. 2C shown second state, the Hubpodest HP is then lowered so that in this case the pedestal surface PF of the lifting platform HP is placed vertically flush with the second or lower level N2 of the second or lower level E2. At the same time, the step structure of the first stair body TK1 is ascended with the steps S1, S2, S3, so that there forms a flight of stairs TL1, which now lowered platform surface PF of the retracted lifting platform HP with the first or upper level N1 of the first or upper level E1 connects. On the other hand, the mechanical coupling when lowering the Hubpodests HP, the stage arrangement of the second staircase TK2 retracted with the steps S4, S5, S6, so that a plane TF2 is flush with the second or lower level N2 of the second or lower level E2 and thus flush with the pedestal PF of the retracted Hubpodests HP vertically flush. In the in Fig. 2C As shown, the load L can then be moved away from the lowered landing surface PF of the lifting platform HP. In the in Fig. 2C It is also noteworthy that even when the lifting platform HP is lowered by forming the staircase TL1 through the first staircase TK1, there is a possibility for pedestrians to easily and conventionally reach the height difference D between the first or upper level N1 of the first or upper Level E1 and the second or lower level N2 of the second or lower level E2 overcome.

In the embodiment of the lifting staircase 1 according to the invention according to the Figs. 3A to 3C is a combination of two Hubpodesten HP1 and HP2 formed with a staircase body TK provided therebetween. The arranged in the middle staircase TK with its stages or slide stages S1, S2, S3 is coupled to both Hubpodeste HP1 and HP2, whose pedestal surfaces PF1, PF2 and their movement, so that the staircase body TK in the retracted state of the slide stages or stages S1, S2 , S3 forms a vertically flush surface TF with the landing surfaces PF1 and PF2 of the lifting platforms HP1, HP2 when both lifting platforms HP1 and HP2 are extended either at the first or upper level N1 of the first or upper level E1 or both to the second or lower level N2 the second or lower level E2 are retracted, as in the Figs. 3B and 3C is shown.

Only in the case in which the first Hubpodest HP1 extended to the first or upper level N1 of the first or upper level E1 and the second Hubpodest HP2 retracted to the second or lower level N2 of the second or lower level E2, via the mechanical Coupling K of the stair body TK to the lifting platforms HP1 and HP2 a staircase TL formed over the extended stages S1, S2, S3, over which a pedestrian between the levels N1 and N2 of the levels E1 and E2 can change.

From the sequence of Figs. 3A to 3C also shows that when approaching a load L, all elements of the elevating staircase 1 are lowered to the second or lower level N2 of the second or lower level E2 to complete a continuous and vertically flush with the lower level E2, together with the pedestal surfaces PF1, PF2 Form surface TF, on which then the load L can ascend, as in Fig. 3B is shown, then, as in Fig. 3C is shown to be raised to the first or upper level N1 of the first upper level E2.

The Figs. 4A to 4D show another variant of the embodiment of the elevating staircase 1 of the invention Fig. 2A to 2C , wherein the couplings K1 and K2 for the first and second staircase TK1 and TK2 are realized via corresponding scissors linkage, parallelogram or parallelogram and where as lifting device HE of Hubpodests HP and the pedestal PF are formed by a so-called scissor lift, in this case a has vertical direction of movement.

For housing for the mechanical couplings K, K1, K2, e.g. in the sense of corresponding scissors linkage or the like, and for the lifting device HE, for the lifting platform HP and the pedestal PF are normally available space for a pit, e.g. in basements, especially if they can be entered upright, or in the form of motor vehicle maintenance pits. In such cases, the scissor mechanism can be arranged as a mechanical coupling K, K1, K2 and the lifting device HE for the lifting platform HP and the pedestal surface PF below the floor.

Under these circumstances, for example, the stairs with their staircase TL 2 or TL1 stand at rest at the top, in which case nothing of the system can be seen, apart from so-called call columns, key switches, buttons or other equipment, the use, eg the call and the corresponding controller and are controlled either by the user or a supervisor, or a store staff or the like.

In the FIGS. 5 and 6 are schematic and sectional side view of other embodiments of the invention elevating staircase 1 with two stair members TK1 and TK2 according to the Fig. 2A to 2C represented here, where it depends on an undercut of the stages S1 to S6, and designed as a lifting device HE scissor lift is designed according to this Unterschneidung.

Steps with undercuts are advantageous if the riser obliquely adjoins the tread or the appearance, so no edges are formed at which an uphill passer could get stuck. Even such a profile can be combined. However, the associated sideways movement of the pedestal plate or pedestal PF allows a replacement run which is in the same direction as the normal run.

In Fig. 5 For example, the scissor lift is vertical, the pedestal or pedestal PF lies on a ball field and requires lateral guidance on a shaft wall. For example, four steps each with 2 cm undercut result in a total displacement of about 8 cm.

According to Fig. 6 can the scissor lift as a lifting device HE also be installed inclined, for example, lying on a prism, so that the scissor lift moves parallel to the undercut or in the direction of the undercut when the scissor lift perpendicular to the prism plate up and down, what an inclined direction of travel with respect to the outer planes E1, E2 and the corresponding levels N1, N2 corresponds.

The arrangements from the FIGS. 7A to 7D and from the 8A to 8D In each case, they do not constitute a functional system because the horizontal alignment of the steps takes place only in conjunction with the front and rear shears: at least one of the two shears must be paired - this results in three points of attack that are not in line.

The Figs. 7A, 7D show a variant of the embodiment Fig. 2A to 2C with two staircases TK1 and TK2, with the front scissor arms being moved around the risers.

In the 8A to 8D show in the same variant how the rear scissor arms of the mechanical coupling K are moved around the risers.

The Figs. 9A and 9B show in a schematic and perspective side view of an arbitrary variant of the embodiment of the lifting staircase 1 of the invention Fig. 2A to 2C , Where appropriate handrails or railing HL are provided in a rigid manner, wherein the Fig. 9A an upper stop, as at the first or upper level N1 for the first or upper level E1, and the Fig. 9B show a second stop below, ie for the second or lower level N2 of the second or lower level E2.

Horizontal handrail extensions can be dispensable insofar as a lifting mechanism is available for the handicapped. Depending on the position of doors, the space for double-sided handrails may be missing. Handrails can also carry warning devices in addition to lighting, e.g. a yellow flashing light, or even a sound signal generator. Furthermore, call or control devices can be provided.

The geometric requirements for handrails are characterized by the fact that their necessary ground plan length remains constant, but their true length is dependent on the pitch.

The simple solution according to the Figs. 9A and 9B provides two rigid handrails HL, one of which is adapted to the lower, the other of the upper stop.

In the Figs. 10A and 10B On the other hand, it is shown that a wrong handrail HL can also be formed, namely from moving elements, which optionally also allows a narrower bar spacing. In the Figs. 10A and 10B Thus, the railing consists of segments on each stage or on each platform surface, so that passengers or passengers can ride there hold, without a relative movement between passer or passenger and the handrail or railing.

The Fig. 11A shows that the difference between true length and ground plan length can be buried in a bag at the entrance. However, this has different grip widths and involves the risk of unwrapping in itself.

According to Fig. 11B it follows that a narrower handrail HL avoids the excess length at the entrance or exit. This can lead to a significant narrowing of the running width by up to 5 cm, possibly further reduced by the grip strength.

The handrail can maintain its length when the horizontal continuation shifts at one end while the handrail is pivoted in the horizontal orientation. If appropriate, this displacement can be reduced, for example halved, if this, the displacement, takes place at both ends. However, this is technically complicated due to the lack of fixed point. The inclination is approximately parallel to the slope, resulting in a deviation of less than 1 °, when the fulcrum is arranged as high as possible for a derailleur or is.

The length shift is taken in the arrangement of an analog handrail on the spare staircase of this.

From the Figs. 12A and 12B As a result, the true length of an inclined handrail HL changes to a plan length when changing to the horizontal. This is reversed at the complementary run. So-called derailleur node EU. DU in single or double version move the handrail HL of the lifting platform HP, if available. Double nodes DU move the handrail stub. The Figs. 12A and 12B show such a handrail HL with simple derailleurs EU on one side and with double derailleurs DU on the other side of the handrail HL. At the same time there are also the scissor linkage of the lower staircase TK2 in the side area, such as a backdrop introduced, whereas they are mounted at the top of the staircase TK1 below the steps. The intended control panel B for controlling the operation of the lifting staircase 1 also serves as a hiding place for the length compensation of the handrail HL.

The Figs. 13A to 13C , show that between two flat staircases, for example, with a maximum gradient of 10 cm, the Hubpodest HP according to Fig. 2A to Fig. 2C can be stopped in a third rest position between the upper and first level N1 and the second or lower level N2. Fig. 13A So shows a rest position on a middle stop. Fig. 13B the access or the driveway from a sidewalk and Fig. 13C access or access from the mezzanine. So here is a three-stop use at a shallow middle stage in the middle state of rest or provided in the middle stop. This can be for example a level of a front garden. Shown in the Figs. 13A to 13C no railings, but these can be or will be provided.

If it is necessary to plan and work with a low pit depth below the elevating staircase 1, the scissors mechanism of the lower staircase can be arranged over a corridor, eg in cuboids, which move against each other like a backdrop and are provided in the side area of the staircase. The height of the cuboid is the highest intersection figure of the scissors increased by the riser, so they show no openings. The derailleur parallelogram for the horizontal handrail at the exit moves with the topmost backdrop, as in the Figs. 14A and 14D is shown.

As in Figs. 15A to 15C For example, three shears may be required to support each stage at three points.

In a variant with a shallow pit, for example on an underground car park floor or the like, the shears of the lower barrel or flight of stairs are arranged above the floor. It In this case, a front and rear scissors are required on both sides, so a total of four pieces.

The Figs. 15A to 15C So show in detail the location of the three scissors for the arrangement described above.

The FIGS. 16A to C show in schematic and perspective side views to describe the technical background, a further variant of a lifting staircase 1 according to the embodiment of the Fig. 2A to 2C with two staircases and a lifting platform, but instead of a scissor linkage, a rod with sliding and non-sliding rod sleeves is provided, as is apparent from the Fig. 16C and FIGS. 17A to 17D in plan view and in cross section, respectively. Instead of the scissor construction, therefore, a linkage is used here as an auxiliary construction, whereby a supporting structure is formed under a non-rectangular ground plan.

According to the Figs. 18A to 18C are also staircase TK1, TK2 conceivable that are formed between two Hubpodesten and can take an alternating climbing direction, which is why then the second to penultimate stage each two risers, ie have their own substantially vertically extending step element. In the presentation of the Figs. 18A to 18C this is the middle stage S2, which must have two risers.

The Figs. 19A and 19B show in the context of a wide outside staircase, a variant of the elevating staircase 1 according to the invention, which in the Fig. 1A to 1C is shown schematically. It becomes clear that in this case the replacement run or replacing flight of stairs is unnecessary, but then serves as fall protection a barrier, here a double barrier.

According to the variant of the Figs. 20A to 20D the elevating staircase 1 according to the invention for the embodiment shown in the Figs. 3A to 3C is shown, unnecessary stair flights can be moved to save space between two Hubpodesten HP1, HP2. In the presentation of the FIGS. 20A to 20C no barriers and railings are provided for protection, but this is only to simplify the presentation, in reality, such measures are required by law alone.

It is an automatic or semi-automatic operation conceivable. In addition to requested trips and additional additional trips are done, for example, an automatic return to a preferred stop and / or an automatic alternate start of stops (Sabbatschaltung).

It is also conceivable the provision of certain signaling devices. The respective condition can accompany a traffic light at each stop or mitfahrend with in Fig. 22 exemplified symbols. These can be supplemented with a second display until the next change and / or by displaying a message such as "Fault", etc. The traffic lights control, for example, access to the system. Depending on the clientele and platform size, two additional traffic lights on the platform can improve the security of the installation, eg with messages such as "forward", "stop", "back".

In one embodiment, it is essential that the length of the scissor linkage is free and variable, as can be seen from the overall technical context described here Figures 1A to 8D . 12A to 14D and FIGS. 18A to 21 and their description.

Among other things, it is shown that the stair body TK, TK1, TK2 is always laterally adjusted in its length in any intermediate state of the movement between the levels N1, N2 to be connected, or between the levels of a lifting platform HP constantly connected by the stair body TK, HP1, HP2 and an output level E1, E2 or another Hubpodestes HP2, HP1, so that the stair body TK, TK1, TK2 in cross-section in the extended state and in any intermediate state of the stair body TK, TK1, TK2 the hypotenuse and in the retracted state of the stair body TK, TK1, TK2, in which this forms an extension of the pedestal, a catheter of a connecting the level to be connected to the output level E1, E2 and the Hubpodests HP, HP1, HP2 or two Hubpodeste HP1, HP2 connecting in the lateral cross section right triangle.

Among other things, this shape therefore decisively depends on the fact that the coupling K, K1, K2 is a mechanical coupling with or consisting of at least one scissors linkage, which is free, ie variable, and thus adaptable with a length. It is thereby achieved that by means of the lifting staircase 1 proposed in this way, an overcoming of staircases and thus of two height levels is possible without a time interruption of the lifting staircase is present in their function as a staircase. This results in particular in a use as or in the area of an escape route.

In contrast, for example, to embodiments with lifting device, eg for wheelchairs, with a pit thought, in which a vertically movable organ is arranged, it follows, however, that provided gate stages by the lifting device when they are not coupled via a scissor linkage and moved , For example, a stair-shaped lifting attachment, which is the actual flight of stairs between the Hubpodest and the lower level geometrically, that is mimicked in its height expansions, can be performed with. About intended Engagement means, for example, vertical webs can then be the individual step elements, for example, when driving up the stairs successively raised or vice versa lowered when retracting. As a result, but only in the respective end position, that is, in the fully extended state, a staircase with consistently the same riser. When driving, there is always a significantly different slope from the remaining steps in height; However, this contradicts the minimum requirements for a staircase and excludes, for example, the use of an escape route.

If a mechanical coupling, and in particular a fixed and fixed length scissor linkage, are used to prevent, e.g. Also to realize a horizontal alignment of the gigs and / or a uniform slope of the staircase, so follows this movement of the pedestal due to the fixed length of the mechanical coupling a circular motion or orbit movement of the staircase with the slide stages. Such orbital motion, however, eliminates the possibility of lateral adaptation - e.g. to a designated pit or to the lateral distance of the levels to be connected - off.

Rather, it follows then that due to the mutual fixed relationship of the articulation and pivot points of such a length-fixed scissor linkage for each intermediate position a constant length and therefore a circular path movement of the combination of staircase and lifting device is present. In the raised state protrudes can then, for. the folded as a pedestal staircase projecting well beyond the lateral extent of an underlying pit, so that for safety reasons always additional measures should be taken to avoid injury in the end of the lifting platform.

In one embodiment of the Huppe staircase invention, this can also be realized by multiple staggered arranged scissors, but it is also possible according to the invention that the Hubpodest goes straight because the scissors has no fixed length and no other type of connections between the steps. The straight ahead is thus either perpendicular with immutable length of all sub-areas in the floor plan or in the direction of sloping steps with immutable length of the first staircase and exit of the spare staircase or spare stairs.

Such a strong connection to the underlying structure is an indispensable prerequisite for use in the context of an escape route.

LIST OF REFERENCE NUMBERS

1

Lifting staircase according to the invention, lifting device according to the invention

B

control panel

D

height difference

E 1

first, upper level

E2

second, lower level

EU

simple derailleur / Umwerferknoten

YOU

double derailleur / derailleur knot

HL

handrail

HL1

first handrail

HL2

second hand

HE

Lifting device, e.g. scissor lift

HE1

first lifting device, e.g. first scissor lift

HE2

second lifting device, e.g. second scissor lift

HP

lift platform

HP1

first lifting platform

HP2

second lifting platform

K

Coupling, mechanical coupling, scissors linkage

K1

first coupling, first mechanical coupling, first scissors linkage

K2

second coupling, second mechanical coupling, second scissors linkage

L

load

N1

first level

N2

second level

PF

platform area

PF1

first podium area

PF2

second pedestal

S

Stage, gate level

S1 - S6

Stage, gate level

TF

Stair body surface, area

TF1

first staircase surface, first surface

TF2

second staircase surface, second surface

TK

stairs body

TK1

first staircase

TK2

second staircase

TL

flight of stairs

TL1

first flight of stairs

TL2

second flight of stairs

Claims (15)

1. Stair lift (1)
   for surmounting a height difference (D) comprising at least two levels (N1, N2), namely for surmounting flights of stairs without temporal interruption of the stairs function.

   - with at least one lifting platform (HP, HP1, HP2) and

   - with at least one stair body (TK, TK1, TK2).

   - whereby the lifting platform (HP, HP1, HP2) has a platform surface (PF, PF1, PF2) which can be moved between two states.

   - whereby the platform surface (PF, PF1, PF2) finishes vertically flush with the first level (N1) in the first state and vertically flush with the second level (N2) in the second state.

   - whereby the stair body (TK, TK1, TK2) has a link step (S) or a number of link steps (S1-S6) and

   - whereby the link steps (S, S1-S6) are coupled to the lifting platform (HP, HP!, HP2) by means of a provided coupling (K) and are coupled to the movement of the platform surface (PF, PF1, PF2) in such a way

   - that the link steps (S, S1-S6) are extended in one of the states and form a stair flight (TL, TL1, TL2) connecting the levels (N1, N2) and are retracted in the other of the states and form a surface (TF) finishing vertically flush with one of the levels (N1, N2) and the platform surface (PF, PF1, PF2),
   characterised in that

   - the coupling (K, K1, K2) is a mechanical coupling with or of at least one scissor linkage, which is arbitrary in length, thus is variable.
2. Stair lift (1) in accordance with claim 1,
   In which the coupling (K, K1, K2) effects a uniform slope of the risers and a horizontal alignment of the link steps (S, S1-S6) in the states and in particular during the movement between the states.
3. Stair lift in accordance with one of the preceding claims, in which the coupling (K, K1, K2) is or has a parallel guide for the link steps (S, S1-S6).
4. Stair lift (1) in accordance with one of the preceding claims, in which two stair bodies (TK1, TK2) are provided, with a lifting platform (HP) between them.
5. Stair lift (1) in accordance with claim 4,

   - in which in the first state the lifting platform (HP) and the first stair body (TK1) form a common surface (TF1) finishing vertically flush with the upper level (N1) and the second stair body (TK2) forms a stair flight (TL2) connecting the lower level (N2) and the platform surface (HP) to the upper level (N1) and

   - in which in the second state the lifting platform (HP) and the second stair body (TK2) form a common surface (TF2) finishing vertically flush with the lower level (N2) and the first stair body (TK1) forms a stair flight (TL1) connecting the platform surface (HP) to the lower level (N2) and the upper level (N1). [N2 in the original]
6. Stair lift (1) in accordance with one of the preceding claims 1 to 3,
   In which two lifting platforms (HP1, HP2) are provided with a stair body (TK) in between.
7. Stair lift (1) in accordance with claim 6

   - in which the link steps (S, S1-S6) are coupled mechanically by means of a mechanical coupling (K) to the first and the second lifting platform (HP1, HP2), the platform surfaces (PF1, PF2) and their movement,

   - in which in states, in which the lifting platforms (HP1, HP2) are situated with their lifting surfaces (PF1, PF2) vertically at the same level, the stair body (TK) with the platform surface (PF1, PF2) and the respective level (N1, N2) form a common surface (TF) finishing vertically flush and

   - in which in states, in which the one lifting platform (HP1, HP2) with its platform surface (PF1, PF2) is situated on one of the levels (N1, N2) and the other lifting platform (HP2, HP1) is situated with its platform surface (PF2, PF1) on the other level, the stair body (TK) forms a stair flight connecting respective lower level (N2) and the platform surface (PF1, PF2) of the lifting platform (HP1, HP2) to the upper level (N1).
8. Stair lift (1) in accordance with one of the preceding claims, in which the mechanical coupling (K, K1, K2) on the stair body (TK, TK1, TK2) engages respectively on or at the underside of the elements forming the tread of the respective link step (S, S1-S6).
9. Stair lift (1) in accordance with one of the preceding claims, in which the mechanical coupling (K, K1, K2) engages on or at the underside of the elements forming the platform surface (PF, PF1, PF2).
10. Stair lift (1) in accordance with one of the preceding claims, in which the mechanical coupling (K, K1, K2) is provided in an underfloor-like way and is or becomes covered by the elements forming the platform surfaces (PF, PF1, PF2) and those forming the link steps (S, S1-S6).
11. Stair lift (1) in accordance with one of the preceding claims,
    in which the mechanical coupling (K, K1, K2) is provided in a floor-mounted manner.
12. Stair lift (1) in accordance with one of the preceding claims,
    In which a lifting device (HE) is configured for movement of a lifting platform (PF, PF1, PF2).
13. Stair lift (1) in accordance with one of the preceding claims,
    In which a stair body (TK, TK1, TK2) and in particular its link steps (S, S1-S6) and/or a lifting platform (HP, HP1, HP2) and its platform surfaces (PF, PF1, PF2) have handrails (HL).
14. Stair lift (1) in accordance with claim 13,
    In which handrails (HL) are allocated to a respective link step (S, S1-S6) and/or a respective platform surface (PF, PF1, PF2) and are moved along with the respective elements during movement between different states.
15. Stair lift (1) in accordance with one of the preceding claims,
    In which at least one further intermediate state is provided, in which a lifting platform (HP, HP1, HP2) is movable to a level between the lower level (N2) and the upper level (N1) and can be retained there.

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