DE102013221211A1 - Device and method for moving a transport element of a load or passenger elevator - Google Patents

Abstract

The invention relates to a device (1) for moving a transport element of an elevator, wherein the device (1) comprises at least one telescopic cylinder (3), the telescopic cylinder (3) comprising a plurality of partial cylinders (4a, 4b, 4c, 4d) Transport element with a free end (6) of the telescopic cylinder (6) is mechanically connectable, wherein the device (1) further comprises at least one guide device (7, 8) for guiding at least one part cylinder (4a, 4b, 4c, 4d), wherein means a movement of the at least one partial cylinder (4a, 4b, 4c, 4d) in and against a stroke direction of the telescopic cylinder (3) can be guided, wherein the guide device (7, 8) or at least one guide element (11a, , 11i) of the guide device (7, 8) for guiding the movement of the at least one partial cylinder (4a, 4b, 4c, 4d) with at least one partial section of an outer surface of the at least one partial cylinder (4a, 4b, 4c, 4d).interacts, as well as a method for moving a transport element.

Description

The invention relates to a device and a method for moving a transport element of a load or passenger elevator.

Lifts for transporting people or loads are usually operated by electric motors, which are mechanically coupled via cables to a cabin of the elevator. Furthermore, there are elevator systems in which hydraulic cylinders are used, which move over pulleys cables. In such elevator systems, the cab hangs on the corresponding pulleys and pulleys.

Furthermore, fall protection devices must generally be present in such elevator systems. For example, in the event of a rupture of a suspension cable, the cabin must come to a safe stop in a short time. Furthermore, a defined speed must never be exceeded during an upward movement or during a downward movement of the cabin. The security systems are relatively complex to manufacture, costly and must be maintained regularly, resulting in significant costs.

The EP 2 428 482 A1 discloses a lift, but for motor vehicles. This comprises at least a first and second lifting element, each with at least one hydraulic cylinder-piston unit for lifting the vehicle. Further, the document discloses lifting columns in which cylinder-piston units are arranged. However, the document does not disclose whether and in what form a cylinder is guided by lifting columns.

The CN 102491224 A discloses an elevator with a telescopic cylinder. However, this document does not disclose details about a guide of sub-cylinders of the telescopic cylinder.

This raises the technical problem of providing a method and a device for moving a transport element of an elevator, which ensure a reliable and safe up and down movement of a, in particular loaded, transport element, wherein a space requirement and manufacturing costs are minimized.

The solution of the technical problem results from the objects with the features of claims 1 and 9. Further advantageous embodiments of the invention will become apparent from the dependent claims.

It is a basic idea of the invention to provide an upward and downward movement of sub-cylinders of a telescopic cylinder by a guide device, said guide device or guide elements of the guide device interact directly with lateral surfaces of the sub-cylinder to enable the previously explained guide. Thus, in an advantageous manner, in particular for long stroke lengths, buckling of the individual partial cylinders can be reliably avoided.

Proposed is a device for moving a transport element of a passenger or freight elevator. For the purposes of the invention, the transport element of the elevator describes an element for transporting persons and / or loads. Thus, this term includes e.g. a cabin, a platform or a car. Of course, the proposed device but also for moving all other types of loads used.

The device thus serves to move the transport element in an upward direction, in particular a vertical direction, and counter to the upward direction, ie opposite to the vertical direction. The vertical direction can be oriented perpendicular to a (plane) earth surface. In particular, the vertical direction may be opposite to a direction of a gravitational force, e.g. acts on the transport element, be oriented. The device is used to move the transport element in a loaded state, for. B. when a load on / in / on the transport element is arranged, as well as in an unloaded state.

The device comprises at least one telescopic cylinder. The telescopic cylinder comprises several partial cylinders. The sub-cylinders are hereby slidable in a known manner. In particular, the partial cylinders have different coordinated outer diameter. Upon extension of the telescopic cylinder, the individual sub-cylinders move sequentially out of the next larger sub-cylinder, in which they are arranged in the retracted state. Accordingly, the partial cylinder move when retracting again in this next larger part of the cylinder.

The telescopic cylinder may in this case comprise two or more, in particular ten, partial cylinders. Preferably, a ratio of a maximum achievable stroke length to a length of the telescopic cylinder in the retracted state is greater than or equal to ten. This advantageously allows a good ratio of installation space to the maximum stroke length. The maximum stroke length here denotes a length of the telescopic cylinder in the fully extended state.

Of course, the proposed device may also comprise at least one actuator which directly or indirectly the extension and / or retraction of the at least one telescopic cylinder causes. Preferably, the device may comprise at least one pump by means of which a pressure of a resource in an inner volume of the telescopic cylinder is adjustable. By adjusting the pressure in this case, the previously explained extension of the telescopic cylinder can be effected. A retraction of the telescopic cylinder can also be effected by adjusting the pressure, in particular a negative pressure. Alternatively or cumulatively, however, the retraction can also be effected via a weight force of the transport element and / or a load. This will be explained in more detail below.

Preferably, the pump can generate a pressure up to 16 bar.

Of course, the device may also include a path detection system for determining a position of the free end of the telescopic cylinder or a current stroke length of the telescopic cylinder. Depending on an output signal of the path detection device can then be carried out advantageously a path-dependent control of the actuator, in particular the pressure provided by the pump.

Further, the transport element is mechanically connectable to a free end of the telescopic cylinder. The transport element may e.g. rigid with the free end, e.g. be connected via other mechanical coupling elements.

Furthermore, the device comprises at least one guide device for guiding at least one partial cylinder, wherein by means of the guide device, a movement of the at least one partial cylinder in and against a stroke direction of the telescopic cylinder can be guided. The stroke direction here refers to a direction of movement during extension of the telescopic cylinder and may preferably correspond to the previously explained vertical direction.

The guide device may have a height that corresponds to at least a predetermined proportion, preferably the complete height or length of the telescopic cylinder in the fully extended state. However, the predetermined proportion may also be in a range of 70% (inclusive) to 100% (exclusive) of the height of the telescopic cylinder in the fully extended condition. In particular, the guide device is one in their dimensions, in particular their height, immutable device. This means that the guide device is not retractable or extendable.

The guide device can in particular also be designed such that a movement of the at least one partial cylinder is prevented in a direction deviating from the stroke direction of the telescopic cylinder. This means that such a deviating movement is not permitted or only to a minimum extent.

The guide device may comprise one or, preferably, a plurality of guide elements. To guide the movement of the at least one partial cylinder, the guide device or the at least one guide element of the guide device interacts with at least one partial section of an outer surface of the at least one, in particular movable, partial cylinder. The outer surface of the at least one partial cylinder can in particular be a lateral surface of the partial cylinder.

For the purposes of the invention may mean interacting that a force directed in or against the stroke direction is not transmitted or only to a small extent from the sub-cylinder on the outer surface of the sub-cylinder on the guide device or the at least one guide element. Forces whose direction deviate from the stroke direction, however, are transferred from the at least one partial cylinder via the outer surface on or in the guide element. In this case, the guide device or the at least one guide element can provide an opposing force which is opposite in direction and equal in magnitude and which is transmitted to the outer surface of the at least one sub-cylinder. Thus, no or only a minimal movement of the sub-cylinder takes place in a direction deviating from the stroke direction. This means that the guide device or the guide element guides the movement of the sub-cylinder over its or on its outer (s) surface.

The guide device or the at least one guide element may in particular be designed as a bearing element. Further, in particular, the guide device or the at least one guide element allow a sliding bearing of the sub-cylinder. For this purpose, materials of the sub-cylinder and the guide device or the guide element can be selected such that a minimum coefficient of adhesion and / or sliding friction between the outer surface and a surface interacting with the outer surface, which may also be referred to as a guide surface, the guide device or the Guiding element is provided. Thus, an inexpensive and low-maintenance or even maintenance-free guidance is provided in an advantageous manner.

In addition to a slide bearing, of course, other bearings are conceivable, for example, a roller bearing.

For example, the at least one partial cylinder may be formed from aluminum. A guide surface of the guide device or of the at least one guide element may in particular be hard anodized.

Thus, a guide is proposed which engages with respect to the at least one sub-cylinder from the outside, wherein the at least one sub-cylinder represents the guided element in its movement and wherein the guide takes place directly over the outer surface of the sub-cylinder. For guidance, a form-fitting connection between the at least one partial cylinder and the guide device or the at least one guide element of the guide device can be produced during movement or, wherein the positive connection allows movement of the at least one partial cylinder in or against the stroke direction, in different directions but minimized or not allowed.

Of course, the device may also comprise a first and a further telescopic cylinder. In this case, the device may comprise a first guide device for guiding at least one sub-cylinder of the first telescopic cylinder and a further guide device for guiding at least one sub-cylinder of the further telescopic cylinder. At free ends of the telescopic cylinder, a connecting element for connecting the free ends may be attached, which extends between the free ends. The transport element can be fastened to the connecting element in this case. This results in an advantageous manner an improved load distribution and storage and an improved and symmetrical force introduction for moving the transport element.

The guide device may in particular be a stationarily arranged guide device. This may for example be fixed in a mounting area, e.g. a floor area or a foundation, be anchored.

Overall, it results in an advantageous manner that a buckling of the part of the cylinder, in particular during the extension or in the extended state, is prevented by the guide device. At the same time, the movement of the transport element in a desired direction is ensured by the guide device. Thus, on the one hand a desired movement of the telescopic cylinder is ensured. On the other hand, the guide device can also ensure that the corresponding part of the cylinder is held securely in the fully extended state of the sub-cylinder and does not buckle.

The proposed device advantageously allows the use of filigree sub-cylinders. This in turn reduces manufacturing costs and a space requirement of the proposed device in an advantageous manner.

Also, the proposed device allows telescopic cylinders with very large maximum stroke lengths can be used, with a buckling is reliably prevented even at long lengths.

In a further embodiment, the guide device has at least one, preferably a plurality, guide element (s) or forms it (s). The at least one guide element is in this case arranged and / or formed such that the at least one partial cylinder can be moved through an opening, in particular a passage opening, or a passage region of the guide element during extension of the telescopic cylinder, in particular during extension of the partial cylinder.

Accordingly, the at least one partial cylinder can also move during retraction of the telescopic cylinder through this opening of the guide element, but in the opposite direction. Of course, this only applies if the at least one partial cylinder is moved during retraction or extension.

Preferably, the guide device has a plurality of guide elements, wherein the guide elements are arranged and / or formed such that each partial cylinder moves through an opening of one of the guide elements during extension of the telescopic cylinder. For example, the guide elements can be arranged spaced apart in the stroke direction with a predetermined distance.

For example, the guide element can have a circular or cylindrical passage opening. In particular, the guide element can have or form a cylindrical or cylindrical passage region, through which a cylindrical partial cylinder can move during extension and / or retraction.

A diameter of the circular passage opening or the cylindrical passage area may be larger by a predetermined amount than an outer diameter of the partial cylinder, which moves through the corresponding passage opening / the corresponding passage area. In this case, therefore, the (inner) surface of the guide element delimiting the cylindrical passage region forms a guide surface which interacts with the outer surface of the sub-cylinder to ensure the desired guidance.

The proposed cylindrical passage region of the guide element can be bevelled, in particular on a lower end in the stroke direction. This means that a diameter of the cylindrical passage area increases in the direction of the stroke direction in the lower end of the guide element. As a result, the partial cylinder can advantageously be supported and centered when it is moved into the passage area.

Thus, the at least one guide element for the corresponding sub-cylinder can provide an exactly adapted in their dimensions outer guide.

Of course, the at least one sub-cylinder and / or the previously explained guide surface of the guide element may be coated or provided with a sliding friction reducing means.

By the guide element with a passage opening or a passage region can be prevented in all directions perpendicular to the lifting direction directions in an advantageous manner buckling.

Of course, the invention is not limited to circular in cross-section cylinder part. In particular, a shape of the at least one guide element can be adapted to an outer shape of the part cylinder to be guided. Thus, a geometric configuration of the passage region of a guide element can be adapted to the outer shape of the leading part cylinder.

In a further embodiment, the guide device comprises a carrier profile, wherein the at least one guide element is attached to the carrier profile or is formed by the carrier profile. The carrier profile may in this case have the previously explained height of the guide device. The carrier profile may in particular be a hollow profile, wherein the at least one guide element is arranged in an inner volume of the hollow profile. Accordingly, the telescopic cylinder also moves in an internal volume of the hollow profile. The carrier profile can in this case be mechanically rigidly connected to a fastening region, in particular a foundation.

In particular, a plurality of guide elements spaced apart from one another in the stroke direction can be fastened to one another on the carrier profile or formed by the carrier profile.

This results in an advantageous manner, a stationary arrangement of guide elements in a desired height, in particular a height which allows the guiding of the movement of the corresponding part of the cylinder.

If the guide device has a plurality of guide elements with passage regions which are arranged spaced apart from one another in the stroke direction at predetermined distances, then a diameter or a maximum width and / or a maximum length of the passage regions in the stroke direction can decrease. Since an outer diameter of the corresponding part cylinder decreases when extending in the stroke direction, this results in the desired leadership without a match between the guide elements and the corresponding sub-cylinders increases.

In a preferred embodiment, the guide device comprises at least one guide element for each movable sub-cylinder of the telescopic cylinder, wherein by means of the guide elements in each case a movement of the corresponding sub-cylinder in and opposite to the stroke direction of the telescopic cylinder can be guided. Of course, the guide device for each movable part of the cylinder may also comprise a plurality of guide elements.

Thus, each movable sub-cylinder is guided in an advantageous manner and stored in the, in particular completely, extended state of the sub-cylinder safely. This reliably prevents buckling of each sub-cylinder. This results in an advantageous manner, a higher stability and thus a higher reliability when moving loads.

In a further embodiment, the at least one guide element has at least one further opening, wherein a connecting element for connecting the free end of the telescopic cylinder and the transport element can be moved through the further opening.

In this case, the further opening can in particular be designed such that the at least one partial cylinder, in particular in the extended state, is not completely enclosed by the guide element. If the at least one guide element is e.g. a cylindrical passage region, a circumferential line of the cylindrical passage region may be part-circular in a cross-sectional plane perpendicular to the stroke direction. Thus, the passage area can be connected via the further opening with an outer area with respect to the guide element, wherein the further opening extends over the entire height of the guide element in the stroke direction.

This advantageously allows a free movement of the connecting element, for example a support beam, which serves to connect the free end of the telescopic cylinder with the transport element.

In a further embodiment, the telescopic cylinder comprises at least one outlet valve for a resource of the telescopic cylinder. The operating means may in particular be a fluid, in particular a hydraulic oil.

The at least one outlet valve is arranged and / or formed and / or controlled so that a desired movement profile is set when retracting the telescopic cylinder. In particular, the at least one outlet valve is arranged and / or configured and / or controlled so that a desired movement profile is ensured when retracting the telescopic cylinder, wherein deviations from the desired motion profile by the arrangement and / or training and / or control not allowed or minimized become.

The motion profile may include a desired path profile, a desired velocity profile, and / or a desired acceleration profile. The speed profile and / or the desired acceleration profile can describe a dependency between the speed and / or the acceleration and a current stroke length of the telescopic cylinder.

In particular, a desired deceleration, that is to say a reduction in the speed, can thus be ensured when retracting the telescopic cylinder and thus during a downward movement of a load. By (partially) opening or (partially) closing the at least one exhaust valve, a quantity of the operating medium can be adjusted, which exits the telescopic cylinder in a predetermined time interval.

The force provided by the telescopic cylinder in the stroke direction (and thus against a downward movement) is dependent on a current inner diameter of the uppermost part cylinder in the vertical direction, a pressure of the operating means and a compressibility of the operating means. In particular at a e.g. nearly incompressible resources, e.g. a hydraulic oil, can thus be controlled or regulated by the at least one outlet valve, a pressure reduction of the equipment.

This in turn allows a control or regulation of the retraction of the telescopic cylinder and thus the downward movement. For example, the at least one exhaust valve can be arranged and / or formed and / or controlled so that when retracting the telescopic cylinder, a difference between acting on the transport element weight, which may also include a weight of the load, and provided by the telescopic cylinder in the lifting direction (Counter) force is greater than 0 and less than a predetermined threshold. In particular, the at least one outlet valve can be arranged and / or configured and / or controlled in such a way that the previously explained difference towards the end of the retraction is reduced, preferably reduced to zero. This may mean that the force provided by the telescopic cylinder in the lifting direction increases towards the end of the run-in.

In this case, the desired motion profile during retraction of the telescopic cylinder can be ensured exclusively by the arrangement and / or training and / or control of the at least one exhaust valve. Exclusively in this context means in particular that no operation of the previously explained actuator is required to ensure the movement profile. Thus, therefore, the at least one actuator for adjusting the upward movement when retracting can be deactivated.

This advantageously allows a safe retraction of the telescopic cylinder and thus a safe downward movement of a load, especially when the at least one actuator fails.

The resource may e.g. a hydraulic fluid, in particular an oil or a water-glycol mixture.

In a preferred embodiment, the at least one outlet valve is arranged in a foot region of the telescopic cylinder. In particular, the outlet valve may be arranged in a lateral surface of the lowermost sub-cylinder in the stroke direction.

In a further preferred embodiment, the at least one exhaust valve is arranged in or on a sub-cylinder, that the exhaust valve when retracting the next inner part cylinder in this sub-cylinder from a predetermined insertion length of the next inner part cylinder, in particular an outer surface of the next inner part cylinder is closed. The insertion length may in this case designate a length of a section of the next inner part cylinder in the stroke direction, wherein the section is arranged in the inner volume of the next larger part cylinder.

Thus, when retracting automatically an amount of the resource, in a predetermined time interval from the internal volume of the Telescopic cylinder can escape, reduced. This in turn requires an automatic increase of the previously described (counter) force, which is provided by the telescopic cylinder in the stroke direction.

It is also possible to provide a plurality of outlet valves arranged one above the other in the stroke direction on one or more sub-cylinders, which are closed or covered one after the other when the sub-cylinders are retracted. As a result, a desired movement profile, in particular a desired speed profile, can be set in an advantageous manner. Thus, motion parameters of downward movement of the load can be adjusted by arranging and designing the exhaust valves.

This in turn advantageously allows a safe downward movement, in particular independent of a functioning of the actuator.

Further proposed is a method for moving a transport element of an elevator. A device for moving the transport element is in this case formed according to one of the previously explained embodiments. The transport element is mechanically connected to a free end of the at least one telescopic cylinder. During the movement of the transport element, in particular during retraction and extension of the telescopic cylinder, a movement of at least one partial cylinder is guided in and against a stroke direction of the telescopic cylinder by means of the guide device. Of course, the guide can only be made at a time at which the telescopic cylinder during retraction and extension has a predetermined stroke length, in particular when the stroke length during the extension of the lifting cylinder is greater than a predetermined stroke length.

According to the invention, the guide device or at least one guide element of the guide device interacts to guide the movement of the at least one partial cylinder with at least one partial section of an outer surface, in particular a lateral surface, of the at least one partial cylinder. This has already been explained above.

In the method, an actuator for generating a driving force for extension (and possibly also for retraction) are controlled such that a desired lifting movement is performed with a desired speed and / or acceleration profile.

In a further embodiment, a pressure generated by a pump is controlled such that an extension of the telescopic cylinder takes place at a constant speed. In this case, the at least one actuator is designed as a pump. The pump can in this case be supplied with electrical energy from a power supply device, e.g. a battery or a power supply.

Due to the diameter of the sub-cylinders tapered during extension, it may be necessary to vary a pressure in order to achieve a uniform extension and thus stroke speed.

For example, it is possible to regulate the pressure provided by the pump path-dependent. Here, e.g. a current stroke length of the telescopic cylinder, for example, a current position of the free end in the stroke direction, are detected. Depending on the detected stroke length, it can then be determined how much and which sub-cylinders have already been extended and must be extended in the future. Depending on this information and geometric dimensions of the sub-cylinder pressure can then be controlled.

In summary, the invention has a number of advantages. Thus, it is possible, for example, to manufacture the sub-cylinders of the telescopic cylinder by means of an easily performed, non-cutting, reshaping pipe end machining. Due to the above-explained and enabled by the invention, the fragile design of the cylinder part, such a pipe end machining makes sense and applicable.

A further advantage is that the device for moving the transport element of the load requires no underpass, so no moving or static elements of the device must be located below the bottom part of the cylinder cylinder cylinder. Thus, the device according to the invention can be easily attached to or in a mounting area, for example on / in the ground, with only minimal or no excavation being necessary.

Further, the space requirement for elements of the proposed device necessary for operation, e.g. for a pump, a resource reservoir and valves, low. These can also be arranged on the mounting area, for example, in addition to the carrier profile described above.

By means of the drive by means of a telescopic cylinder, it is further advantageously obtained that the proposed device is less susceptible to environmental influences, e.g. a draw, is.

The invention will be explained in more detail with reference to an embodiment. The figures show:

1 a perspective view of an elevator,

2 a detailed perspective view of in 1 illustrated elevator,

3 another detail view of the in 1 illustrated elevator,

4 a perspective view of the in 1 illustrated elevator in the fully extended state,

5 a side view of a first carrier profile of in 4 illustrated elevator,

6a a cross section through a first guide element,

6b a cross section through a fourth guide element,

6c a cross section through an eighth guide element,

7a a cross section through a guide element,

7b a cross section through a guide element and a telescopic cylinder and

8th a cross section through a foot portion of the telescopic cylinder.

Hereinafter, like reference numerals designate elements having the same or similar technical features.

1 shows a perspective view of a device according to the invention 1 to move a cabin 2 a lift. The device 1 includes a first telescopic cylinder 3 and another telescopic cylinder, the in 1 is not visible. The first telescopic cylinder 3 includes four sub-cylinders 4a . 4b . 4c . 4d (see eg 5 ). A first and lowest part cylinder 4a Here is a stationary arranged part cylinder 4a while the remaining part cylinders 4b . 4c . 4d movable part cylinders of the telescopic cylinder 3 are.

A connection bar 5 is at a free end 6 (please refer 7b ) of the telescopic cylinder 3 mechanically fastened. This connection bar 5 connects the free ends 6 the two telescopic cylinders 3 , At the connection bar 5 turn is the cabin 2 mechanically attached to the elevator.

The device 1 further comprises a first guide device 7 and another guide device 8th , By means of the first guide device 7 is a movement of the part cylinders 4b . 4c . 4d of the first telescopic cylinder 3 in and against a stroke direction of the telescopic cylinder 3 feasible. The stroke direction here refers to a direction oriented in a vertical direction z, wherein the vertical direction z is orthogonal to a surface 9 a fastening area, for example a ground surface, is oriented. The vertical direction z may in particular be opposite to a direction of the car 2 be oriented acting weight.

Accordingly, the further guide device is used 8th for guiding a movement of the movable part of the cylinder further cylinder in and against the lifting direction.

The first and the further guiding device 7 . 8th are similarly trained. Therefore, hereinafter, only the first guide device will be described 7 explained in more detail.

The first guide device 7 includes a carrier profile 10 and nine guide elements 11a . 11b . 11c . 11d . 11e . 11f . 11g . 11h . 11i , The guide elements 11a , ..., 11i be here by the carrier profile 10 trained or are attached to this.

In 1 is shown that the carrier profile 10 a cuboidal hollow profile, which on one side a in the stroke direction extending slot 12 having. Thus, the carrier profile 10 over the entire height of the carrier profile 10 slotted. Through the slot 12 extends at the free end 6 of the first telescopic cylinder 3 fixed connecting beams 5 , Of course, the carrier profile 10 also have other profile shapes, such as a hollow cylindrical profile shape.

The carrier profile 10 is at the attachment surface 9 fixed or in a vertical direction z below the mounting surface 9 placed foundation placed. The same applies to the carrier profile 10 the further guide device 8th ,

By extending the telescopic cylinder 3 can the cabin 2 in the vertical direction z, that is to move upwards. During this extension movement, the moving part cylinders move 4b . 4d . 4d of the first telescopic cylinder 3 successively through passage areas 13 (see eg 2 ) of the individual guide elements 11a , ..., 11i , This will be explained in more detail below.

In the fully extended state of the first telescopic cylinder 3 each movable part cylinder extends 4b . 4c . 4d through the previously explained passage areas 13 several guide elements 11a , ..., 11i , Thus, the guide elements serve 11a , ..., 11i both a guide of the movement of the movable part cylinder 4b . 4c . 4d as well as a holder in the extended state of the corresponding sub-cylinder 4b . 4c . 4d ,

From a fully extended state of the corresponding sub-cylinder 4b . 4c . 4d this also moves during a retraction movement of the first telescopic cylinder 3 , so in a movement against the stroke direction, through the passage areas 13 the corresponding guide elements 11a , ..., 11i , When fully retracted, the passages are 13 the guide elements 11a , ..., 11i free.

2 shows a perspective detail view of a first detail D1 1 , Shown is an eighth guide element 11h which is in an internal volume of the carrier profile 10 the first guide device 7 is arranged. The eighth guide element 11h has a rectangular outer shape in a cross-sectional plane perpendicular to the stroke direction. Next, the guide element 11h a cylindrical passage opening, which has a cylindrical passage area 13 of the guide element 11h formed. The passageway area 13 is here in the middle in the guide element 11h arranged. That is, centerlines of the guide element 11h and the passage area 13 overlap. The center lines extend in this case in the vertical direction z.

Through the passage area 13 is a lower outer surface (lower side) of the guide element in the stroke direction 11h with an upper outer surface (upper side) of the guide element in the stroke direction 11h connected.

Further shown is that the guide element 11h another opening 14 that is that of the passageway area 13 included inner volume with an outer volume of the guide element 11h combines. The further opening 14 For example, it may be slit-shaped, with the slit also extending along the vertical direction z. Thus, the passageway area 13 in the stroke direction down, in the stroke direction upwards and open to a direction perpendicular to the stroke direction or accessible from these directions. Here is the guide element 11h such in the internal volume of the carrier profile 10 arranged that the slot 12 of the carrier profile 10 and the further opening 14 of the guide element 11h are oriented towards the same side or are arranged on the same sides. Thus, the passageway area 13 through the slot 12 and the further opening 14 accessible. The further opening 14 serves to carry out the connection bar 5 (please refer 1 ) during an upward and downward movement of the telescopic cylinder 3 ,

In 3 is a perspective detail view of another detail D2 1 shown. Shown is a first guide element 11a which is a guiding element which is the lowest in the stroke direction 11a the first guide device 7 is. Here it is shown that a part of the second part cylinder 4b of the telescopic cylinder 3 in the passage area 13 (see eg 2 ) of the first guide element 11a hineinerstreckt. Here is a diameter of the cylindrical passage area 13 of the first guide element 11a to an outer diameter of the hollow cylindrical second partial cylinder 4b customized. This means that the diameter of the passageway area 13 equal to or larger than the outer diameter of the second sub-cylinder by a predetermined (small) amount 4b is. Thus, a movement of the second part of the cylinder 4b through the passageway area 13 of the first guide element 11a allows in and against the stroke direction. Movements of the second part cylinder 4b in directions other than the stroke direction, however, are prevented. Has the second part cylinder 4b the passageway area 13 of the first guide element 11a completely pass in the stroke direction, for example, in the fully extended state of the second part of the cylinder 4b or the first telescopic cylinder 3 , so are also movements of the second part of the cylinder 4b in directions that deviate from the stroke direction prevented. Thus, therefore, a buckling of the telescopic cylinder 3 in the area of the second part cylinder 4b effectively prevented. Corresponding designs of course apply to all other sub-cylinders 4c . 4d and guide elements 11b , ..., 11i (please refer 1 ).

In 4 is a perspective view of the device according to the invention 1 with fully extended telescopic cylinders 3 shown. In 4 It can be seen that in the fully extended state of the telescopic cylinder 3 a first part cylinder 4b through passageways 13 (see eg 2 ) of a first, a second and a third guide element 11a . 11b . 11c extends. Accordingly, a third part cylinder extends 4c through passageways 13 a fourth, a fifth and a sixth guide element 11d . 11e . 11f , Accordingly, a fourth part cylinder extends 4d through passageways 13 a seventh, an eighth and a ninth guide member 11g . 11h . 11i , Thus, each movable part cylinder 4b . 4c . 4d during a movement through three guide elements 11a , ..., 11i guided and held in the fully extended state.

During extension from a fully retracted condition of the first telescopic cylinder 3 passes through the second part cylinder 4b successively passage areas 13 the first, the second and the third guide element 11a . 11b . 11c , After that is the second part cylinder 4b fully extended. After that, the third part cylinder passes through 4c successively the passage areas 13 the fourth, the fifth and the sixth guide element 11d . 11e . 11f , After that is the third part cylinder 4c fully extended. After that, the fourth part cylinder passes through 4c successively the passage areas of the seventh, the eighth and the ninth guide member 11g . 11h . 11i , After that is also the fourth part cylinder 4c and thus the entire first telescopic cylinder 3 fully extended.

As previously explained, the diameter of the passage areas 13 the first, the second and the third guide element 11a . 11b . 11c to an outer diameter of the second part cylinder 4b customized. Accordingly, the diameter of the passage areas 13 the fourth, the fifth and the sixth guide element 11d . 11d . 11f to an outer diameter of the third part of the cylinder 4c customized. Thus, a diameter of the passage areas 13 the fourth, the fifth and the sixth guide element 11d . 11e . 11f smaller than the diameter of the passage areas 13 the first, the second and the third guide element 11a . 11b . 11s , Accordingly, the diameters of the passage areas 13 of the seventh, eighth and ninth guide elements 11g . 11h . 11i to an outer diameter of the fourth part of the cylinder 4d adapted and thus smaller than the diameter of the passage areas 13 the fourth, the fifth and the sixth guide element 11d . 11e . 11f , Thus it can be seen that the diameters of passage areas 13 the guide elements 11a , ..., 11i decrease in the stroke direction, wherein diameter of passage areas 13 of guide elements 11a , ..., 11i that is a movement of a particular sub-cylinder 4b . 4c . 4d lead, are the same.

In 5 is a side view of the first guide device 7 shown. As in 4 , is the telescopic cylinder 3 shown in a fully extended state. It is clear that there is a free end 6 of the first telescopic cylinder 3 where the in 4 illustrated connection bar 5 can be attached.

As well as in 4 It can be seen that each movable part cylinder 4b . 4c . 4d of the first telescopic cylinder 3 in the fully extended state through passage areas 13 (please refer 2 ) of three guide elements 11a , ..., 11i extends. Further shown is that the guide elements 11a , ..., 11i in the stroke direction along the carrier profile 10 are arranged at predetermined distances from each other. The distances are the same here. Of course, however, different distances can be selected from each other.

Shown are further three sections BB, CC, DD, with corresponding cross sections in the 6a . 6b . 6c are shown.

6a shows a cross section BB (see 5 ) through the first guide device 7 in the region of the first guide element 11a , It is shown that the second part cylinder 4b through a passageway area 13 (please refer 2 ) of the first guide element 11a extends. It can be seen that the passage area 13 of the first guide element has a first diameter D1, which, as previously explained, to an outer diameter of the second part of the cylinder 4b is adjusted.

Thus, a partial section of an outer surface, in particular a lateral surface, of the second partial cylinder 4b at one of the first guide element 11a trained guide surface. The guide surface of the guide element 11a is in this case of the through hole 13 comprehensive side wall of the guide element 11a educated.

7b shows a cross section CC (see 5 ) by a fourth guide element 11d , Again, a diameter D2 of the passageway area 13 (please refer 2 ) of the fourth guide element 11d shown. It is essential that the diameter D2 of the fourth guide element 11d smaller than the diameter D1 of the first guide member 11a (please refer 7a ).

In 7c is a cross section DD (see 5 ) of an eighth guide element 11h shown. Again, a diameter D3 of the passageway area 13 of the eighth guide element 11h shown, wherein this diameter D3 smaller than the diameter D1, D2 of the first and the fourth guide member 11a . 11d (please refer 7a and 7b ). Thus, the guide elements 11a , ..., 11i to the tapered outer diameter of the sub-cylinder 4a . 4b . 4c . 4d of the telescopic cylinder 3 customized.

7a shows a cross section through the in 2 illustrated eighth guide element 11h , Here is a beveled end portion 15 of the passage area 13 of the eighth guide element 11h shown. It is shown that there is a diameter of the passage area 13 in a lower portion of the eighth guide member in the lift direction 11h enlarged in a direction opposite to the stroke direction. For example, this lower section may be about a quarter, an eighth or one tenth of the height of the passage opening 13 extend. The bevelled end area 15 allows an improved introduction of a telescopic cylinder 3 when moving in the stroke direction. In particular, a tilting of a retracting partial cylinder 4d with a bottom of the guide element 11h avoided.

In 7b is a cross section through, for example, the first guide element 11a represented, wherein a second partial cylinder 4b of the telescopic cylinder 3 in a transit area 13 of the guide element 11a is arranged. It can be seen that a lateral surface of the second part of the cylinder 4b to the of the guide element 11a formed side walls, which the passage area 13 limit.

In 8th is a cross section through a foot portion of the first telescopic cylinder 3 shown. Shown is an inlet opening 16 , wherein in the inlet opening 16 a non-illustrated check valve may be arranged or the inlet opening 16 may include such a check valve. Via a supply line 17 Thus, a resource, such as a hydraulic oil, from an actuator, such as a hydraulic pump in an inner volume of the telescopic cylinder 3 be encouraged. The check valve ensures that through the supply line 17 no equipment can escape from the internal volume.

Also shown is a return line 18 , which may for example lead to a hydraulic tank, not shown. The return 18 is over several outlet openings 19a . 19b . 19c . 19d . 19e . 19f with the inner volume of the telescopic cylinder 3 fluidly connected. Here are the outlet openings 19a , ..., 19f arranged spaced apart in the stroke direction with a predetermined distance. A first, a second, a third, a fourth and a fifth outlet opening 19a , ..., 19e connect an internal volume of the first part of the cylinder 4a with the return 18 , A sixth outlet opening 19f connects an internal volume of the second part cylinder 4b with the return 18 , In the outlet openings 19a , ..., 19f may be arranged check valves or the outlet openings 19a , ..., 19f may include check valves that control the flow of the resource from the return line 18 in the inner volume of the telescopic cylinder 3 prevent. When retracting the telescopic cylinder 3 First, the sixth outlet opening 19f from the lateral surface of the third part of the cylinder 4c locked. Subsequently, when entering first the fifth outlet opening 19e , the fourth outlet opening 19d , the third outlet opening 19c , the second outlet opening 19b and finally the first outlet opening 19a each through the lateral surface of the second part of the cylinder 4b locked. Thus, therefore, the total opening available to the outlet of the resource is sequentially reduced during retraction. This also reduces the speed of pressure reduction in the telescopic cylinder 3 and thus also reduces the entry speed. Hides the outer surface of the second part cylinder 4b the first outlet opening 19a , so no resources through the return line 18 be dissipated. In this case there is no reduction of the through the telescopic cylinder 3 generated pressure, which is directed against the retraction, more possible. Thus, the speed of the downward movement is reduced to zero.

Of course, it is conceivable, more valves both in the inlet opening 16 as well as in the outlet openings 19a , ..., 19f provide, which can change a lot of the incoming or outflowing equipment.

LIST OF REFERENCE NUMBERS

1

contraption

2

cabin

3

first telescopic cylinder

4a, 4b, 4c, 4d

partial cylinder

5

connecting beams

6

free end

7

first guide device

8th

second guide device

9

mounting surface

10

carrier profile

11a, ..., 11i

guide elements

12

slot

13

Passage area

14

further opening

15

bevelled end area

16

inlet port

17

supply

18

return

19a, ..., 19f

outlet

D1

first diameter

D2

second diameter

D3

third diameter

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2428482 A1 [0004]
• CN 102491224 A [0005]

Claims (10)

Device for moving a transport element of an elevator, the device ( 1 ) at least one telescopic cylinder ( 3 ), wherein the telescopic cylinder ( 3 ) several partial cylinders ( 4a . 4b . 4c . 4d ), wherein the transport element with a free end ( 6 ) of the telescopic cylinder ( 6 ) is mechanically connectable, wherein the device ( 1 ) at least one guiding device ( 7 . 8th ) for guiding at least one partial cylinder ( 4a . 4b . 4c . 4d ), wherein by means of the guiding device ( 7 . 8th ) a movement of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) in and against a stroke direction of the telescopic cylinder ( 3 ) is feasible, characterized in that the guiding device ( 7 . 8th ) or at least one guide element ( 11a , ..., 11i ) of the guiding device ( 7 . 8th ) for guiding the movement of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) with at least a portion of an outer surface of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) interacts. Device according to claim 1, characterized in that the guiding device ( 7 . 8th ) at least one guide element ( 11a , ..., 11i ) or forms, wherein the guide element ( 11a , ..., 11i ) is arranged and / or formed such that the at least one partial cylinder ( 4a . 4b . 4c . 4d ) when extending the telescopic cylinder ( 3 ) through an opening or passageway ( 13 ) of the guide element ( 11a , ..., 11i ) is movable therethrough. Device according to one of the preceding claims, characterized in that the guiding device ( 7 . 8th ) a carrier profile ( 10 ), wherein the at least one guide element ( 11a , ..., 11i ) on the carrier profile ( 10 ) or from the carrier profile ( 10 ) is formed. Device according to one of the preceding claims, characterized in that the guiding device ( 7 . 8th ) at least one guide element ( 11a , ..., 11i ) for each movable part cylinder ( 4b . 4c . 4d ) of the telescopic cylinder ( 3 ), wherein by means of the guide elements ( 11a , ..., 11i ) in each case a movement of the corresponding sub-cylinder ( 4b . 4c . 4d ) in and against the stroke direction of the telescopic cylinder ( 3 ) is feasible. Device according to one of the preceding claims, characterized in that the at least one guide element ( 11a , ..., 11i ) at least one further opening ( 14 ), wherein through the further opening ( 14 ) a connecting element for connecting the free end ( 6 ) of the telescopic cylinder ( 3 ) and the transport element is movable. Device according to one of the preceding claims, characterized in that the telescopic cylinder ( 3 ) at least one outlet valve ( 19a , ..., 19f ) for a resource of the telescopic cylinder ( 3 ), wherein the at least one outlet valve ( 19a , ..., 19f ) is arranged and / or formed and / or controlled such that a desired movement profile when retracting the telescopic cylinder ( 3 ) is set. Apparatus according to claim 6, characterized in that the at least one outlet valve ( 19a , ..., 19f ) in a foot region of the telescopic cylinder ( 3 ) is arranged. Device according to one of claims 6 or 7, characterized in that the at least one outlet valve ( 19a , ..., 19f ) in or on a partial cylinder ( 4a . 4b ) is arranged so that when retracting the next inner part cylinder ( 4b . 4c ) in the sub-cylinder ( 4a . 4b ) from a predetermined insertion length of the next inner part cylinder ( 4b . 4c ) is closed. Method for moving a transport element of an elevator, wherein a device ( 1 ) for moving the transport element at least one telescopic cylinder ( 3 ), wherein the telescopic cylinder ( 3 ) several partial cylinders ( 4a . 4b . 4c . 4d ), wherein the transport element with a free end ( 6 ) of the telescopic cylinder ( 3 ) is mechanically connected, the device ( 1 ) at least one guiding device ( 7 . 8th ) for guiding at least one partial cylinder ( 4a . 4b . 4c . 4d ), wherein by means of the guiding device ( 7 . 8th ) a movement of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) in and against a stroke direction of the telescopic cylinder ( 3 ), characterized in that the guiding device ( 7 . 8th ) or at least one guide element ( 11a , ..., 11i ) of the guiding device ( 7 . 8th ) for guiding the movement of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) with at least a portion of an outer surface of the at least one partial cylinder ( 4a . 4b . 4c . 4d ) interacts. A method according to claim 9, characterized in that a pressure generated by a pump is controlled such that an extension of the telescopic cylinder ( 3 ) at a constant speed.

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