EP1462409A1 - Lifting platform with Bowden cable - Google Patents

Abstract

The elevating platform has a lifting plate (3) for the lifting of loads, and a Bowden cable (20) with an inner cable (21) and an outer conduit (25). The outer conduit is fastened by its first end (26) to the lifting plate, and the inner cable by its first end (22) to a fixed point. The elevating platform also has a drive to exert an extension force on the inner cable and/or to exert a compressive force on the outer conduit in order to raise the lifting plate. The second end (27) of the outer conduit is fastened to a fixed point. An independent claim is included for a passenger lift with the proposed elevating platform.

Description

The invention relates to a lifting platform for lifting loads, for example for wheelchairs.

Such lifting devices are known in numerous embodiments. For example, DE 43 42 373 A1 describes a lifting device a platform and a support unit arranged on the side of the platform. The platform is connected to the support unit via a tension belt, whereby the tension belt is guided over a height-adjustable pulley. By the Moving the deflection roller exerts a tensile force on the tension belt that the platform is raised.

Such lifts serve in particular as transportable means for Overcome small differences in height of up to 1 m.

The object of the present invention was to provide a further lifting platform for Specify lifting loads. The lift should be as simple as possible be built up, it should be easy to maintain, if possible it should be be portable, easy to use and safe to operate.

To solve the problem, a lifting platform with a Lifting plate specified for lifting loads, which is characterized is that they have a Bowden cable with a soul and a coat comprises, the jacket having a first end on the lifting plate and the Soul with a first end attached to a fixed point and being the Lifting platform also drive means for exerting a tensile force on the soul and / or for exerting a compressive force on the jacket to the Lifting plate. The first end of the soul is preferably in attached in close proximity to the highest point on which the lifting plate should be raised.

In the context of the present invention, a is under a lifting plate any device element for receiving a good to be lifted Roger that. A lifting plate can in particular be a metal, plastic and / or Wooden plate or be combined from the materials mentioned. The Lifting plate can also comprise a reinforcement frame or a frame.

A Bowden cable in the sense of the invention is any device with a flexible, resilient soul and a flexible, enveloping soul Coat that is pressure-resistant to compressive forces acting on its opposite Ends work. The one used according to the invention is preferred Bowden cable is a conventional Bowden cable and has a metal one Jacket and a slidably arranged in the jacket (possibly multi-core) Wire as soul.

By providing one or more Bowden cables for lifting the Lifting plate it is possible to use a lifting platform without a striking side Support unit or large dimensioned height-adjustable elements as in to produce DE 43 42 373 A1. According to the invention, the Use of large dimensions to be placed under the lifting platform Lifting equipment such as lifting scissors can be dispensed with. The invention Overall, the device can be made very inconspicuous, it is easy to assemble and all parts that are susceptible to wear can be easily being repaired. The lift can be used in particular to overcome Height differences of up to 30 cm, preferably up to 50 cm or even up to 1 m. The use of Bowden cables enables in addition, the construction of lifts with an approach height of less less than 10 cm, preferably less than 5 cm, particularly preferably a maximum of 3.5 cm.

To lift a load with the lifting platform according to the invention can a pressure force is exerted on the jacket of the Bowden cable, for example, in the case of a core fixed at both ends its second end opposite the first end towards the first and thus in the direction of the lifting plate. The soul prevents the jacket from breaking out sideways, so that the Lifting plate is lifted through the jacket while transmitting the compressive force becomes.

Simultaneously or alternatively, a pulling force on the soul can also occur are exercised, the sheath having a second end in one Fixed point is attached. Here are such embodiments of the preferred lifting platform according to the invention, in which there is coat and soul the Bowden cable in the non-raised state of the lifting plate in Do not extend essentially in the lifting direction, but at least one of the angled portion of the lift direction, which is more than a quarter, preferably makes up more than half of the Bowden cable. By the Exerting traction on the soul becomes a section of the soul from the Jacket pulled out, namely through the second end of the jacket, so that as a result the length of the between the second end of the soul and the second end of the mantle exposed, not surrounded by the mantle is enlarged by the extracted section.

When the pulling force is exerted on the soul, it is tightened. Because the coat however, maintains its length and also has its second end in one Fixed point is fixed, the result is that attached to the lifting plate first end of the jacket and with it the lifting plate along the thrilling soul upwards in the lifting direction. With this type of Lifting loads therefore only indirectly exerts a compressive force on the jacket exercised.

The exertion of tensile force on the soul and of compressive force on the coat can also be done in combination by both the second end of the Jacket (directly) applied with a compressive force as well as the second end traction is applied to the soul.

In preferred embodiments of the invention, the drive means comprise a pulley to wind up the soul. In this way the soul can a small-sized drive means with the necessary traction become. The pulley winds up when the lifting plate is lifted Section of the soul on so this section of the soul as above described is pulled out of the coat.

In particularly preferred embodiments of the lifting platform according to the invention the soul becomes between its second end and the second end of the jacket over a pulley. It is special preferred if the drive means are set up to move the Deflection roller to pull a section of the soul out of the coat. The traction exerted by the drive means is in these embodiments transferred to the soul through the pulley. In such according to the invention Embodiments can be done by moving the pulley Section of the soul pulled out of the mantle through its second end , the length of this section being a multiple (preferably is twice the distance the pulley is moved. In particularly preferred embodiments, the soul is so over the Deflection pulley guided that it is preferably at an angle of 100 ° -260 ° 160 ° -180 ° and particularly preferably is deflected by 180 °. At a Deflection angle of 160 ° -180 ° and in particular with a deflection angle of 180 ° is the length of the section of the soul that comes from the mantle Moving the pulley is pulled out about twice the length the way the pulley is moved. By using it A pulley can therefore be a large one in a particularly small space Lifting height of the lifting platform according to the invention can be achieved.

The use of a deflection roller, especially while observing one Deflection angle of 160 ° -180 ° (in particular of 180 °), is especially for such lifts preferred according to the invention, with which a lifting plate (without limiting means, see below) by more than 30 cm, preferably by at least 50 cm to 1 m, particularly preferably up to 60 cm should be. Despite the height difference that can be overcome with such lifts the drive means can be small and space-saving. This advantage comes in particular when using a pull rod Wear, more on that below.

Embodiments in which the drive means are also preferred include a powered tie rod to make up a section of the soul to pull the coat. Corresponding powered tie rods are in the Commercially available, they are small, reliable and comparatively inexpensive, so that these advantages of the lifting platform according to the invention get. By interacting with one or more Bowden cables make it possible to raise the pull rod Lifting plate not in the direction of the lifting movement, but preferably too to move on a plane transverse to the lifting direction. The invention Lifting platform therefore comes in such a preferred embodiment without the otherwise necessary vertical devices. The pull rod can in particular by an electric motor, hydraulic or pneumatic are driven. It is particularly preferred to pull the tie rod through to drive an electric motor because such motors are readily available take up little space and work quietly.

In one embodiment of a lifting platform according to the invention, the second is End of the soul on the pull rod directly or via an adapter attached. This makes it particularly easy to synchronize several Bowden cables to operate. For this purpose, the souls of the Bowden cables can be attached using fasteners, for example a mounting plate connected to the tie rod become. Pressing the pull rod synchronizes everything on it fortified souls exerted a pull. This enables one particularly smooth running of the lifting platform according to the invention.

In a further embodiment of the lifting platform according to the invention Drawbar connected to the pulley, through which the soul is deflected. If the lift has more than one Bowden cable to lift the Lifting plate is equipped, so it is preferred if all souls of this Bowden cables are guided over corresponding assigned pulleys, which are connected to the drawbar via an axis. this makes possible also a particularly smooth run of the invention Lift.

The pull rod is particularly preferably guided in a guide.

It is further preferred if the drive means support springs exerting traction on the soul and / or exerting the Include compressive force on the jacket. The spring means can in particular Tension or compression springs, with gas springs being particularly preferred. at The spring means can use a rope pulley to wind up the soul in particular one or more coil springs or helical spiral coil springs that act on the pulley to lift to support the lifting plate. When using a pull rod for Pulling a section of the soul out of the mantle is special preferred if the spring means comprise a tension and / or compression spring which at the second end of the soul (if necessary via the adapter means, especially via the mounting plate) and / or on the deflection roller or whose axis is fixed. In a particularly preferred embodiment the soul is deflected by a movable pulley through 180 °, whereby a gas spring with a first one on both sides of the deflection roller End is attached, and the second end of each of the two gas springs a fixed point is attached. When moving the pulley to exercise a pulling force on the soul (i.e. for lifting the lifting plate) Gas springs relaxes so that the gas springs exert the pulling force support. When moving the pulley in the opposite direction (i.e. to lower the lifting plate) the gas springs are tensioned again. When using several Bowden cables and several pulleys for Lifting the lifting plate, it is preferred if all pulleys on one common axis are arranged, at the two ends of each first end of a spring means of one of the types described above (in particular a gas spring) is attached. Instead of gas springs, you can other tension and / or compression springs are used, in particular Tension and / or compression springs. However, gas springs have proven to be particularly advantageous. The use of spring means in the Drive means makes it possible in particular to exert the pulling force on the Support the soul and / or the exertion of pressure on the coat. This makes it easier to lift the lifting plate, for example to compensate for an average expected weight to be lifted.

In addition, it is preferred if the drive means securing means include the drive means in the event of a rupture of the soul and / or one Decommission destruction of the mantle. The security means that Operational safety of the lifting platform according to the invention can be increased by the drive means in the event of damage and / or destruction of the Lifting plate moving Bowden cable be shut down. An unintentional Start up one by damaging or destroying one In this way, Bowden's unsafe lift can be avoided.

In preferred embodiments, the securing means comprise Spring means to pretension the second end of the soul and one with the second end of the soul and interacting with the drive means Switch to shut down the drive means when the spring means is over selected security measure is relaxed. Relaxing the Spring means over the preselected safety measure only occurs if the soul tears. In this case the switch is operated, the switch acts on the drive means to shut it down, preferably by Interrupting a power supply to the drive means. Preferably that is Spring means a compression spring to the second end of the soul towards one Press switch, the switch being a power supply to the Drive means interrupts when the switch passes through the second end of the soul under the influence of the pressure force exerted by the compression spring becomes.

In particularly preferred embodiments of the lifting platform according to the invention is a guide to guiding the first end of the mantle Assigned lifting plate. The guide makes it possible to counter the lifting plate Stabilize movements perpendicular to the lifting direction. In addition, the Leadership fixing the first end of the soul. The leadership is in preferred embodiments of the lifting platform according to the invention Guide column.

It is further preferred if the guide is a limiting means includes to raise the lifting plate to a maximum lifting height limit. In particular, it is preferred if the limiting means is on or in leadership and / or on the soul at a pre-selectable position is fixable. In a particularly preferred embodiment, this is Limiting means a clamping screw that is inserted into the guide and is fixed in and / or on the soul. The limiting means permits advantageous way of lifting the lifting plate to a height below the limit the highest achievable height to which the lifting plate would otherwise be could be raised. By using a limiting agent the lifting plate can therefore be lifted against the limiting device be pressed. This prevents the lifting plate in the raised state jumps up slightly when relieved or under load something sagged. It is useful if the drive means Include switching means to stop lifting the lifting plate when the lifting plate has reached the limiting means and with a preselected one Starch is pressed against the limiting agent. Such a switching device the drive means may preferably include a current limit.

The guide preferably has a first opening for engaging Holding means of the lifting plate and a second opening for the passage of the Bowden cable. In particular, it is preferred if the guide is in shape a guide column with two lateral recesses, for example in the Form of longitudinal slots or slots is formed. By the Holding means of the lifting plate through a recess and the jacket of the Bowden cable through the other recess in the guide column reach in, damage to the Bowden cable by the Holding means can be prevented in an advantageously simple manner.

In addition, a lifting platform is preferred, the guidance of which is a Guide surface and the lifting plate has a swiveling ramp with a pivot lever, the pivot lever and the guide surface cooperate to move the ramp from a rest position into a to pivot from this angled securing position when the Holding plate is moved. Movable ramps are especially for Lifts known for wheelchairs. They allow the lifting plate to go through Roll up easy to reach and at the same time secure against unintentional Roll down when the lifting plate has been moved in the lifting direction. By the interaction of a pivot lever and A guide surface can be a particularly simple and robust control the pivoting behavior of the ramp plate in the operation of the invention Lift can be reached. The guide surface can in particular on a projection attached to the guide. Is also it is possible to use the swivel lever in a guide groove with two guide surfaces respectively.

In addition, a lifting platform of the type according to the invention is preferred, which is portable. For example, the lift can be on a base frame or a base plate can be constructed by using guide columns on Base frame or the base plate are attached, being on each guide column a first end of a Bowden cable core is attached. To exercise the Traction on the souls and / or to exert a pressure on the The drive means can also be attached to the base frame become. The lift can then be moved using the base frame become. It is preferred if the weight of the lift (including a possibly existing basic frame and / or one possibly existing base plate) is less than 100 kg. Preferably the weight of the lift is up to 92 kg, particularly preferably up to 90 kg if the lift is set up (without limitation means, see above), to raise the lifting plate up to 60 cm, and preferably up to 72 kg, particularly preferably up to 70 kg, if the lifting platform (without Limiting means, see above) is set up for lifting the lifting plate by up to to 30 cm.

The drive means, for example a motor, are expediently a Rope pulley, a pull rod and / or one or all pulleys, on the side Lifting plate arranged on the base frame or on the base plate, one possibly existing tie rod a movement preferably essentially in a plane parallel to the base plate or to the base frame to lift the lifting plate. In this way, the lifting plate be driven on from the other sides. For example, a rectangular one or square base plate can thus be accessible from three sides. A guide column is expediently located at each corner of the base plate arranged.

The lifting platform according to the invention is in preferred embodiments set up for lifting loads weighing up to 250 kg, preferably up to 200 kg. There are such embodiments preferred according to the invention, with which loads of at least 50 kg, particularly preferably at least 70 kg and particularly preferably loads from at least 70 kg to 200 kg as described above with the lifting plate can be raised, preferably by at least 30 cm and particularly preferred by up to 60 cm. Particularly good designs such lifting platforms according to the invention have at least four Guides as described above, preferably in the form of a Guide column. The guides are each a Bowden cable as above assigned so that the first end of the soul described each of the Bowden cables at the upper end of the assigned guide column in the lifting direction attached and the respective first end of the associated jacket on the Lifting plate (possibly with the help of fasteners) is attached. On in this way the load to be lifted is distributed over several Bowden cables, which makes the individual Bowden cables smaller than when using a lower number of Bowden cables can be selected. In addition, the Operational safety is increased because if a Bowden cable core breaks, the Lifting plate no longer as when using only a Bowden cable can crash.

Finally, a passenger elevator with a is particularly preferred Lifting platform according to the invention according to one of the previously described Embodiments. Such an elevator is easy to manufacture, inconspicuous, space-saving, robust, easy to maintain and possibly also transportable.

Fig. 1

eine Prinzipskizze einer Ausführungsform einer erfindungsgemäßen Hebebühne;

Fig. 2

einen Ausschnitt einer Seitenansicht auf eine erfindungsgemäße Hebebühne,

Fig. 3

einen Ausschnitt einer weiteren Seitenansicht auf die Hebebühne gemäß Fig. 2,

Fig. 4

eine weitere Prinzipskizze in Seitenansicht von Antriebsmitteln einer erfindungsgemäßen Hebebühne,

Fig. 5

eine Aufsicht auf die Antriebsmittel gemäß Fig. 4,

Fig. 6

eine Ansicht erfindungsgemäßer Begrenzungsmittel, und

Fig. 7

eine schematische Ansicht erfindungsgemäßer Sicherungsmittel.

The invention is explained in more detail below on the basis of preferred exemplary embodiments and the figures. They represent:

Fig. 1

a schematic diagram of an embodiment of a lifting platform according to the invention;

Fig. 2

a section of a side view of a lifting platform according to the invention,

Fig. 3

2 shows a section of a further side view of the lifting platform according to FIG. 2,

Fig. 4

another schematic diagram in side view of drive means of a lifting platform according to the invention,

Fig. 5

4 shows a top view of the drive means according to FIG. 4,

Fig. 6

a view of limiting means according to the invention, and

Fig. 7

a schematic view of securing means according to the invention.

The lifting platform according to the invention shown in Fig. 1 has a base frame (not shown in Fig. 1) on which a mounting plate 11 and a Motor 12 are attached. The motor 12 is operatively connected to a Drawbar 14. On the drawbar 14 are another mounting plate second ends 23 of two Bowden cable souls 21 attached. The first ends 22 the Bowden cable core 21 are each attached to a fixed point. The Bowden cable souls 21 are each with a Bowden cable jacket 25 for Formation surrounded by Bowden cables 20. The first end 26 of the Bowden cable coats 25 is attached to a lifting plate 30, the second end 27 of the jackets 25 is attached to the mounting plate 11, respectively. The Bowden cable coats 25 do not extend in a straight line between their two ends 26 and 27 Line but are angled. The same applies accordingly to souls 21.

The motor 12 is operated to operate the lifting platform according to the invention set so that the tie rod 14 the distance between the second ends 23 of the souls 21 and the second ends 27 of the jackets 25 are enlarged. The Bowden cables 20 are streamlined. Because the length of the coats 25 remains unchanged, the lifting plate 30 moves towards the first ends 22 the Bowden cable core 21 is raised (in the direction of the arrow). To lower the tie rod 14 retracted so that the distance between the second Ends 23 of the souls 21 and the second ends 27 of the jackets 25 are reduced is so that the lifting plate 30 is lowered (against the direction of the arrow). The drive means shown in Fig. 1 are particularly suitable to the Lift plate 30 to raise up to 30 cm.

In Fig. 2 is a section of a side view of an inventive Lift shown. The lift has drive means such as for example shown in Fig. 1 or Fig. 4, 5. The lift has a base frame 10, on which a guide column 40 is attached. A lateral recess 42 in the guide column 40 is sufficient Bowden cable 20 inside the guide column 40. The soul 21 is on hers first end 22 at the end facing away from the base frame 10 Guide column 40 attached. The first end 26 of the jacket 25 is at one the guide column 40 movably mounted lifting plate 30 attached. The Lifting plate 30 has a reinforcement frame arranged on its underside and is held on the guide column 40 by holding means 32. The Holding means 32 engage through a further lateral recess (see FIG. 3) the guide column 40 for securing the lifting plate 30 against lateral Moving one. The jacket 25 is subjected to a compressive force and / or a tensile force is exerted on the core 21, the lifting plate 30 pushed away from the base frame 10 along the guide column 40 and raised. Is the tensile force exerted on the soul 21 reduced and / or the pressure force exerted on the jacket 25 is reduced, the lifting plate sinks 30 along the guide column 40 in the direction of the base frame 10.

3 is a further section of a side view of the invention Lift shown in Fig. 2. On the base frame 10 is in turn, a guide column 40 is attached to the base frame 10 opposite end, a first end 22 of a core 21 of a Bowden cable 20 is attached. The jacket 25 of the Bowden cable 20 is 26 at its first end attached to a lifting plate 30. The lifting plate 30 is held by holding means 32 (partially covered), which in a second recess 43 of the guide column 40th intervene, led. The guide column 40 also has a side of the Guide column 40 outstanding guide gauge 45 with an angled Guide surface 46. The lifting plate 30 is connected to a hinge 34 with a Ramp plate 35 articulated. The drive plate 35 has one Swivel lever 36 on the guide surface 46 of the guide gauge 45 slides along. The guide surface 46 is at its end on the base frame side angled in the direction of the guide column 40.

In the initial state, the lifting plate 30 of the invention is Lift on the floor and lies with its reinforcement frame on the Base frame 10 on. The pivot lever 36 is in the direction of Guide column 40 pressed in at point 47. The ramp 35 is then opposite the lifting plate 30 in the direction of the base frame 10 angled and forms a ramp that drives up to the Lifting plate relieved. When lifting the lifting plate 30 by exercising one Tractive force on the soul 21 and / or a compressive force on the jacket 25 is the Lifting plate 30 raised. The pivot lever 36 slides on the Guide surface 46 along the guide gauge 45 and is by the Guide column 40 pushed away. As a result, the ramp is around Hinge 34 rotated so that it points away from the base frame 10 and one lateral protection against unintentional rolling off the lifting plate 30 forms.

The lift can be cladded between two guide columns 40 to prevent accidental insertion of objects under the To prevent lifting plate 30. The cladding can expediently therefore be rigid. If the fairing is rigid, then it is preferred only attached to those sides of the lift that are not to be driven over, for example by a wheelchair. In particular, the Side of the lift on which the ramp is arranged, without one rigid cladding remain.

Fig. 4 shows sections of drive means of a lifting platform according to the invention. 4 are particularly suitable for lifting a lifting plate by more than 30 cm, in particular by 50 to 60 cm. The In addition to the pull rod 14 already described above, drive means comprise in addition to the associated motor 12, a deflection roller 16 around which the core 21 of a Bowden cable 20 is deflected by 180 °. The second end 23 of the soul 21 is attached to a fastening device on which also the second end 27 of the jacket 25 of the Bowden cable 20 is attached. the fastening device is not movable in relation to the engine. The pull rod 14 is connected to the guide roller 16 and this can be from the fastening device move away and vice versa back towards the Move the fastening device (arrows). For lifting the lifting plate (not shown) the pull rod 14 is actuated. The one from the drawbar The tensile force exerted by the deflection roller 16 on the core 21 transfer. By moving the pulley 16 under the influence of Pull rod 14 is a section of the soul 21 from the jacket 25 through its second end 27 pulled out, the length of this section is approximately twice the path by which the deflection roller 16 moves becomes. To raise the lifting plate by 60 cm, for example, the Deflection roller 16 through the tie rod 14 by 30 cm from the second end 23 of the Soul 21 pulled away (arrows).

In Fig. 5 the drive means shown in Fig. 4 are again represented schematically in a top view. Fig. 5 shows that the Lift has four Bowden cables 20 with souls 21 and jackets 25. The Souls 21 are deflected through deflection rollers 16 by 180 °. In the here shown supervision come the second ends 23 and 27 of the souls 21st and the respective associated coats 25 to lie one above the other and can are therefore not shown separately.

The deflection rollers 16 are arranged on an axis 17 which on the Drawbar 14 is attached. The pull rod 14 is driven by the motor 12. At both ends of the axis 17 is a first end of a spring plunger 19 attached to a gas spring 18. The gas springs 18 are at their second end each attached to the fastening device on which the second Ends 23, 27 of the Bowden cables 20 are fastened. Bend the gas springs a bending of the axis 17 under that transmitted by the souls 21 Load before.

The drive means further comprise a guide 15 with a guide rod and a carriage. The axis 17 slides with the guide carriage in the guide rod of the guide 15 and is thus against movement secured transversely to the main direction of movement of the tie rod 14.

To raise the lifting plate (not shown), the pull rod 14 is through the motor 12 extended and pulls the axis 17 with the deflection rollers 16 away from the second ends 23, 27 of the souls 21 and the jackets 25. The Axis 17 slides with the guide carriage in the guide rod Guide 15. By moving the pulleys 16, a section of the Souls 21 from the sheaths 25 through their respective second ends 27 pulled out. The length of this section is approximately double the Path by which the deflection rollers 16 are moved. Extending the Drawbar 14 is supported by the gas springs 18, 19. The gas springs 18, 19 are relaxed and press the axis 17 in with their spring plungers 19 the main direction of movement of the drawbar 14.

4, 5 can, as in the rest, as in Fig. 2, 3, 6 and / or 7 be designed and accordingly a base frame and four guide columns 40, a guide gauge 45 and drive plate 35 with swivel lever 36, limiting means 50 and securing means including a spring 121, a receptacle 123 and a switch with Positions 124, 124 ', 112, 112' include.

To lower the lifting plate (not shown), the pull rod 14 is through the motor 12 retracted so that the axle 17 with the deflection rollers 16 in Moved towards the second ends 23, 27 of the souls 21 and jackets 25 becomes. The free section of the souls 21 becomes between the second Ends 23 of the souls 21 and the associated sheaths 27 shortened (by about twice the distance by which the drawbar is retracted). At the same time, the gas pressure springs 18 via their spring plunger 19th curious; excited.

FIG. 6 shows a view of a delimiting means according to a lifting platform one of the previous figures. The first end 26 of a jacket 25 is on one Lifting plate over a fastening (not shown, see Fig. 2, 3) attached. The first end 22 of the associated soul 21 is at one end attached to a guide column 40, as described above for FIGS. 2, 3. To the Core 21 is a fastener in the form of a clamping screw 50 arranged. The clamping screw 50 is on the core 21 at a distance attached by its first end 21 to the lifting of the lifting plate on a limit the maximum lifting height. When lifting the lifting plate, the Attachment of the first end 26 of the jacket 25 against the towards the first end 22 of the core 21 moves until the clamping screw 50 reaches is. The clamping screw 50 prevents the attachment from moving further of the first end 26 of the jacket 25 and thus a further lifting of Lifting plate. Because of the pressure force exerted on the jacket 25 and / or because of the tensile force exerted on the soul 21, the lifting plate is over the Attachment of the first end 26 of the jacket 25 against the clamping screw 50 pressed. One with the drive means (not shown, see also for example, Fig. 1, 4 and 5) controlling connected current limitation ends when a preselected pressure on the clamping screw is reached 50 the further exertion of a pulling force on the soul 21 and / or one Compressive force on the jacket 25, so that the lifting plate against the Clamping screw 50 remains pressed without this being preselected Tear position. By pressing the lifting plate against the Clamping screw 50 prevents the lifting plate from being raised Condition jumps up slightly when relieved or somewhat when loaded sags.

In Fig. 7 are schematically securing means of an inventive Lift according to one of the previous figures shown to drive means shut down when a soul tears. The soul 21 is with its second End 23 fixed in a receptacle 123. the recording 123 is by a Compression spring 121 with a compressive force in the direction of the second end 23 applied. In normal operation of the lift this will be second end 23 under the action of the drive means - in particular one Drawbar 14 and possibly an associated deflection roller 16 - slightly moves against the direction of the spring force of the spring 121 when the Lifting plate (not shown) of the lift is raised, or slightly up to a preselected security measure in the direction of Spring force of the spring 121 moves when the lifting plate is lowered and the tractive force is reduced. However, if the soul tears 21, it will Recording 123 under the action of the spring force of the spring 121 on the preselected security measure towards the second end 23 of the Soul 21 moves. The receptacle 123 actuates a switch by moved it from position 124 to position 124 '. By pressing the Switch becomes an electrical contact from a closed position 112 moved to an open position 112 '. By opening the electrical Contact (position 112 '), a current supply 110 is separated, so that none Current can flow through the current guide 110. The current guide 110 serves the power supply to the motor 5 (not shown) of the drive means. By opening the contact (position 112 ') we the motor 5 of the Power supply disconnected and therefore shut down. The lifting plate 30 is thus no longer raised or lowered, but locked in the result. The The lift is then against use in one by tearing the Soul 21 caused unsafe condition protected.

The soul 21 replaced. The second end 23 of the new soul 21 is in the recording 123 attached, while the first end 22 of the soul 21, for example on upper end of a guide column 40 (see e.g. Fig. 2, 3, 6) is attached. The core 21 is biased against the spring force of the spring 121, so that the switch is moved from position 124 'to position 124 again becomes. In this position the electrical contact is closed (position 112), so that the motor 5 again with a Power supply is connected. The lift can then be used again Raise or lower the lifting plate 30 are operated.

Claims (10)

Lifting platform with a lifting plate (30) for lifting loads, characterized in that the lifting platform comprises a Bowden cable (20) with a core (21) and a jacket (25), the jacket (25) having a first end (26) are fixed to the lifting plate (30) and the core (21) with a first end (22) at a fixed point, and wherein the lifting platform furthermore drive means for exerting a tensile force on the core (21) and / or for exerting a compressive force on the Jacket (25) comprises to raise the lifting plate (30). Lifting platform according to claim 1, characterized in that the drive means are set up for exerting a tensile force on the core (21) and the casing (25) is fastened with a second end (27) at a fixed point. Lifting platform according to claim 2, characterized in that the core (21) is guided between its second end (23) and the second end (27) of the casing (25) via a deflection roller (16). Lifting platform according to claim 3, characterized in that the drive means are arranged to move the deflection roller (16) in order to pull a section of the core (21) out of the casing (25). Lifting platform according to one of Claims 2 to 4, characterized in that the drive means comprise a driven pull rod (14) which cooperates with the core (21) in order to pull a section of the core (21) out of the casing (25). Lifting platform according to one of the preceding claims, characterized in that the drive means comprise spring means (18, 19) for supporting the application of the tensile force on the core (21) and / or for supporting the application of the compressive force on the casing (25). Lifting platform according to one of the preceding claims, characterized in that the drive means comprise securing means (121, 123, 124, 112) in order to shut down the drive means when the core (21) tears and / or the casing (25) is destroyed. Lifting platform according to one of the preceding claims, characterized in that a guide (40) for guiding the lifting plate (30) is assigned to the first end (26) of the casing (25). Lifting platform according to claim 8, characterized in that the guide (40) comprises a limiting means (50) in order to limit the lifting of the lifting plate (30) to a maximum lifting height. Passenger elevator with a lifting platform according to one of the previous ones Expectations.

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