EP1790608B1 - Elevator system comprising a device for compensating the difference of weight between the section of the carrying means on the car side and on the counterweight side and method for creating said compensation - Google Patents

Description

The invention relates to an elevator installation with a device for compensating the weight difference, which is dependent on the position of the elevator car, between the car cabinets carrying the elevator car and the counterweight struts of the suspension elements carrying the counterweight, as well as a method for realizing such a compensation.

Out EP1445229 an elevator installation is known which comprises an elevator cage and a counterweight, a drive unit with a traction sheave and suspension elements running over the traction sheave, wherein between the elevator cage and a shaft wall parallel to a suspension cable with lines for the transmission of energy or of control signals a flexible counterbalancing line is installed. This weight balancing train can be present, for example, as a link chain or in the form of wire ropes or straps and extends in the form of a hanging loop of a lying about halfway up the elevator system fixed point to the bottom of the elevator car. Without compensation device causes - for example, at the lowest position of the elevator car - the combination of long cabin-side and short counterweight side support means sections a considerable torque on the traction sheave. In the uppermost position of the elevator car, the combination of short cabin-side and long counterweight-side suspension element sections causes a torque in the other direction of rotation on the traction sheave. Without compensation device, the drive unit has depending on Load situation to apply these torques in addition to the torque resulting from the difference in weight between the car and counterweight. With a weight balancing train or more weight balancing strands, whose weight per meter corresponds approximately to twice the weight per meter of all parallel arranged suspension elements, is in the elevator system according to EP1445229 the unwanted weight influence of the suspension means compensated described.

In the EP1445229 disclosed elevator system has certain disadvantages. One of the disadvantages is that in addition to the suspension cable with the integrated conductors for transmitting energy or control signals at least a separate, arranged parallel to the hanging cable flexible weight balancing train must be installed, resulting in additional costs for the weight balancing train itself, as well as for its procurement, Storage and assembly has the consequence. Another disadvantage is the fact that such flexible weight balancing strands are available only in a limited number of variants with respect to their meter weight. An optimal compensation of the difference in weight between the cabins and the counterweight strums of depending on the elevator configuration different meter weights having support means can therefore often not be realized. In addition, the required in several meter-weight variants storage of such weight compensation strands, as well as the additional logistics required enormous cost. In elevator systems with transparent shafts, additional weight compensation strands also affect the appearance of the entire system.

Out US 2004/0055831 A1 An elevator installation is known, which comprises a suspension means with a lift cabin carrying a cab center and a counterweight carrying counterweight strand. Hanging cables with integrated conductors for the transmission of energy and / or control signals are installed in the form of hanging loops between each fixed point and the elevator car or the counterweight, which also have the function of the respective position of the elevator car dependent weight difference between Kabinentrum and Gegengewichtstrum compensate. In order to achieve a sufficient compensation effect of the suspension cable, is in US2004 / 0055831 proposed to integrate filler material, such as ropes or steel scrap, in cavities of such suspension cables in order to increase their weight per meter. However, such a compensation device requires the production of special suspension cables with integrated additional load or the production and use of separate, parallel to the suspension cables arranged load cables. Both solutions are associated with procurement difficulties and high production costs. In addition, the adaptation to different meter weights of the support means for cabin and counterweight can be realized only with a variety of suspension cables or arranged parallel load cables with different meter weights, which additionally increases the cost of their production and stockpiling.

The invention has for its object to propose an elevator system, which does not have the mentioned disadvantages of the cited as prior art elevator systems. In particular, therefore, an elevator system with a device for compensating the weight difference between the cabin-side Trumen (Kabinentrumen and Gegengewichtsseiteigen Trumen (Gegengewichtstrumen) of the support means are created, which requires neither an additional weight balancing strand still in different weight versions specially manufactured suspension cables with integrated additional load or separate, parallel to the suspension cables load cable, which costs for procurement, logistics and installation should be saved. The compensation device should be able to be adapted to the conditions of an elevator installation in such a way that optimum compensation of the unwanted weight difference between the car center spaces and the counterweight struts of the suspension elements can be achieved.

The object is achieved by an elevator system according to the invention according to claim 1 and by a method according to claim 8 according to the invention. In the elevator installation according to the invention, a suspension cable with integrated conductors for transmitting energy and / or control signals is provided, which at least partially compensates for the difference in weight between the cabin centers and the counterweight struts of the suspension elements, weight elements being fixed on the outside thereof to increase the weight per meter of the suspension cable.

According to the weight elements are fixed at regular intervals on the hanging cable.

The term "meter weight" is understood to mean the weight of a suspension cable or a suspension element referred to one meter in length.

In the method according to the invention, a suspension cable with integrated conductors for the transmission of energy and / or control signals is installed in an elevator installation to compensate for the difference in weight between the car centers and the counterweight struts of the suspension elements, wherein the weight per meter is increased by weight elements whose outside are fixed. According to the weight elements are fixed at regular intervals on the hanging cable.

The invention is therefore based on the idea of increasing the weight per meter of commercially available suspension cables with integrated conductors for the transmission of energy and / or control signals by weight elements distributed along their length such that they compensate for the unwanted weight difference between the two Compensate the cabins and the counterweights of the suspension elements.

The advantages achieved by the invention are essentially to be seen in the fact that can be dispensed with additional weight equalization strands with all their disadvantages mentioned above, and that not a variety of expensive custom-made suspension cables or parallel load cables are required with integrated in cavities filling materials, but that commercially available and therefore cost-effective suspension cables can be used whose running meter weight can be flexibly and inexpensively adapted to any requirement by attaching weight elements at different distances.

Advantageous embodiments and further developments of the invention and the inventive method will become apparent from the dependent claims and are described below.

The invention is particularly easy to implement if the suspension cable with the integrated conductors is a flat cable, wherein weight elements are fixed only on one or both of the flat sides of the suspension cable.

A simple and time-saving attachment of the weight elements on the suspension cable is achieved in that along the suspension cable at regular intervals mounting holes are provided, through which fastening elements can be inserted for fixing the weight elements.

Commercially available and thus inexpensive hanging cables can be used if - preferably plate-shaped - weight elements along the suspension cable are fixed exclusively by clamping at regular intervals on this.

Advantageously, along the suspension cable at regular intervals markers - for example, color markings or impressions in the jacket of the suspension cable - available that facilitate the positioning of the weight elements at regular intervals.

If two or more suspension cables arranged in parallel are required for the compensation of the difference in weight between the cabins and the counterweight strums of all the suspension means, it is expedient to connect the hanging cables arranged in parallel with correspondingly wide, plate-shaped weight elements. With this measure, the group of suspension cables is stabilized against vibrations in all horizontal directions.

High flexibility of the inventive method is achieved in that the meter weight of the suspension cable of a given situation is adapted by the distance between the individual weight elements or the weight of the individual weight elements or both the distance and the weight of the weight elements are selected accordingly.

According to a particularly preferred embodiment of the invention, the weight difference between the cabins and the counterweight struts of the suspension means is completely and exclusively compensated by at least one hanging cable having means for increasing its meter weight.

Embodiments of the invention are explained below with reference to the accompanying drawings, wherein the respective first digit of the reference numerals with the number of FIG. matches, in which the marked with the reference object is shown.

Fig. 1A

einen schematischen Querschnitt durch eine Aufzugsanlage mit einer Aufzugskabine in unterster Position, einem Gegengewicht, Tagmitteln sowie einem zwischen Aufzugskabine und Schachtwand angeordneten Hängekabel, das den Gewichtsunterschied zwischen den Kabinentrumen und den Gegengewichtstrumen der Tragmittel kompensiert.

Fig. 1B

die Aufzugsanlage gemäss Fig. 1A, wobei sich die Aufzugskabine in oberster Position befindet.

Fig. 2A

eine zweite Aufzugsanlage bei der ein zusätzliches Hängekabel zwischen dem Gegengewicht und der Schachtwand angeordnet ist und sich die Aufzugskabine in unterster Position befindet .

Fig. 2B

die Aufzugsanlage gemäss Fig. 2A, wobei sich die Aufzugskabine in oberster Position befindet.

Fig. 3

einen Abschnitt eines erfindungsgemässen Hängekabels mit daran fixierten Gewichtselementen.

Fig. 4

einen Querschnitt durch ein erfindungsgemässes Hängekabel mit einem auf einer Seite des Hängekabels fixierten Gewichtselement.

Fig. 5

einen Querschnitt durch ein erfindungsgemässes Hängekabel mit zwei auf je einer Seite des Hängekabels fixierten Gewichtselementen.

Fig. 6

einen Querschnitt durch ein erfindungsgemässes Hängekabel mit zwei auf je einer Seite des Hängekabels durch Klemmen fixierten Gewichtselementen.

Fig. 7

einen Querschnitt durch ein nicht zur Erfindung gehörendes Hängekabel mit in seinem Mantel integrierten Hohlräumen, die mit gewichtserhöhenden Füllmaterialien gefüllt sind.

Fig. 8

zwei parallel angeordnete erfindungsgemässe Hängekabel, die mittels Gewichtselementen miteinander verbunden sind.

Show it:

Fig. 1A

a schematic cross section through an elevator system with an elevator car in the lowest position, a counterweight, day means and arranged between the elevator car and shaft wall hanging cable, which compensates for the difference in weight between the car center and the counterweight trunks of the support means.

Fig. 1B

the elevator system according to Fig. 1A , where the elevator car is in the uppermost position.

Fig. 2A

a second elevator installation in which an additional suspension cable between the counterweight and the shaft wall is arranged and the elevator car is in the lowest position.

Fig. 2B

the elevator system according to Fig. 2A , where the elevator car is in the uppermost position.

Fig. 3

a section of a suspension cable according to the invention with weight elements fixed thereto.

Fig. 4

a cross section through a suspension cable according to the invention with a fixed to one side of the suspension cable weight element.

Fig. 5

a cross section through a suspension cable according to the invention with two fixed on one side of the suspension cable weight elements.

Fig. 6

a cross section through a suspension cable according to the invention with two on each side of the suspension cable fixed by clamping weight elements.

Fig. 7

a cross section through a not belonging to the invention Suspension cable with integrated cavities in its shell, which are filled with weight-increasing filling materials.

Fig. 8

two hanging cables arranged in parallel according to the invention, which are connected to one another by means of weight elements.

Fig. 1A shows a schematic cross section through an elevator installation 101 with an elevator shaft 102, an elevator car 103 and a counterweight 104, in which a drive unit 105 via a traction sheave 106 and flexible support means 107 carries the elevator car and the counterweight and drives. The elevator car is shown in its lowest position. A suspension cable 109 with integrated conductors and with means (not shown here) for increasing its weight per meter is arranged between the elevator car 103 and a shaft wall 108 of the elevator shaft 102. This hanging cable 109 on the one hand has the task of transmitting energy and control signals to the elevator car 103 and on the other hand to compensate for the influence of the weight forces of the two acting on the traction sheave 106 dreams 107.1 and 107.2, the ratio of which changes depending on the position of the elevator car.

Fig. 1B shows the elevator system according to Fig. 1A however, the elevator car 103 is shown here in its uppermost position. From the two Fig. 1A and 1B It is easy to see that, when the elevator car is positioned at the bottom, the strands 107.1 of the carrying means 107 leading to the elevator car weigh considerably more heavily than the strands 107.2 leading to the counterweight 104. In contrast, in the case of the above-positioned elevator car ( Fig. 1B ) to the elevator car 103 leading strumes 107.1 of the support means 107 much less than the leading to the counterweight 104 dreams 107.2. Without additional weight compensation means, the drive unit 105 would have to be designed such that it can overcome the torque on the traction sheave 106 resulting from the differently long runs 107.1, 107.2 of the support means 107 in addition to the torque which is determined by the maximum difference between the weights of the fully loaded and unloaded weights Empty elevator car 103 and the counterweight 104 results. The suspension cable 109 provided with means for increasing its meter weight compensates in the Fig. 1A and Fig. 1B illustrated elevator system in each position of the elevator car 103 between the two strands 107.1, 107.2 of the support means 107 existing imbalance, so that the drive power of the drive unit 105 is interpreted only in accordance with the maximum possible imbalance between the weight of the elevator car and the weight of the counterweight. The weight per meter of the hanging cable 109 here corresponds to twice the added meter weights of the parallel suspension element strands 107, whereby two or more suspension cable strands can be arranged in parallel to achieve the required meter weight of the suspension cable 109.

Fig. 2A and Fig. 2B show a second elevator installation 201 with an elevator car 203 and a counterweight 204 in the two extreme positions of the elevator car, the elevator car hanging on the car center 207.1 and the counterweight on the counterweight 207.2 of the support means 207. The drive unit 205 is arranged in this system on the counterweight 204 and drives a traction sheave 206 which, by cooperating with a stationary flexible drive train 220 at the cabin entrances 207.1 hanging elevator car 203 and the counterweight 204 suspended from the counterweight trunks 207.2. A first hanging cable 209.1 provided with means for increasing its weight per meter is guided from a first shaft wall 208.1 of the hoistway 202 to the elevator car 203, and a similar second hanging cable 209.2 is guided from a second hoistway 208.2 of the hoistway 202 to the counterweight 204. This embodiment of the invention makes sense, because at the elevator car 203 as well as at the counterweight 204 ever a suspension cable is required at least for the transmission of energy. The weight per meter of each of the two suspension cables 209.1, 209.2 corresponds here to the added meter weights of the parallel suspension element strands.

Fig. 3 shows a portion of a suspension cable 309 according to the invention with weight elements 311 fixed thereto as means for increasing its weight per meter. The hanging cable 309 comprises a substantially flat jacket 310 made of a flexible, extrudable material - for example made of rubber or an elastic plastic - in which electrically conductive metal strands 312 are embedded. In order to fix the weight elements 311 on the hanging cable 309, this is provided along its length with a plurality of mounting holes 313, wherein between adjacent mounting holes always the same distance a is present. Depending on the required weight of the suspension cable 309, weight elements a are fixed at a simple distance a or at a multiple of the distance a on the suspension cable. This is preferably done with inserted through the mounting holes 313 of the hanging cable screws 314, as in connection with the 4 and 5 is shown in more detail. Of course, instead of screws as well other fasteners such as rivets, blind rivets, snap connections, etc. may be used. Weight elements 311 are attached either only on one of the flat sides of hanging cable 309 or on both sides according to the required weight of the meter, and in combination with the use of weight elements selected according to the weight of the meter to be achieved from a number of available weight elements of different weight. The meter weight of the suspension cable can be adapted with high accuracy to the conditions of the elevator installation.

Fig. 4 shows a cross section through a suspension cable according to the invention 409, in which plate-shaped weight elements 411 are fixed only on one of the flat sides of the hanging cable. The fixation of the weight elements is carried out by a screw connection, wherein the shank of the screw 414 is inserted through one of the suspension cables present at regular intervals mounting holes. Conveniently, a self-locking nut 415 is used for the screw connection. The embodiment according to Fig. 4 is particularly suitable for suspension cables whose weight per meter is only slightly increased.

Fig. 5 shows a cross section through a suspension cable 509 according to the invention, in which plate-shaped weight elements 511 are fixed on both flat sides of the hanging cable, wherein the weight elements have raised side edges 511.1, which center and align the weight elements 511 opposite the hanging cable 509. The fixation of the weight elements 511 is also carried out by a self-locking screw connection, wherein the shank of the screw 514 is inserted through one of the mounting holes in the hanging cable at regular intervals. The embodiment according to Fig. 5 is particularly suitable for hanging cables whose meter weight is relatively strong increase.

Fig. 6 shows a cross section through a suspension cable 609 according to the invention, on which plate-shaped weight elements 611 are fixed on both flat sides of the suspension cable 609 exclusively by clamping. The weight elements 611 are dimensioned such that they protrude laterally beyond the hanging cable 609. The required clamping force is generated by clamping screws 616, which are arranged laterally next to the suspension cable 609 and connect the two weight elements in the region of their ends projecting beyond the suspension cable. It is advantageous to use self-locking screw connections here as well. The embodiment according to Fig. 6 is particularly suitable for commercial hanging cables that are not provided with mounting holes.

Fig. 7 shows a cross section through a not belonging to the invention hanging cable 709, which has inside its shell 710 integrated cavities 718, which are filled with weight-increasing filler 719. The cavities 718 are created and filled in the production of the hanging cable by extrusion, wherein as filler material such as lead shot, steel shot, sand or made by cross notches made flexible metal rails can be used.

Fig. 8 shows an embodiment of the invention, wherein the at least two parallel hanging cables 809 by a plurality of plate-shaped weight elements 811 connected to each other. The stability of the entire suspension cable device is thereby improved and their tendency to oscillate is greatly reduced.

Furthermore, in Fig. 8 Marks 817 which are provided at regular intervals on the hanging cables 809, to facilitate the fixing of the weight elements 811 also at regular intervals. The markings 817 can, for example, be applied to the jacket of the suspension cables when they are produced in the form of color markings, laser markings or embossed transverse grooves. Such markings on the hanging cable are useful in all embodiments of the present invention, in which the regular distances are not predetermined by mounting holes in the hanging cable.

Suspension cables, which are exposed to relatively high additional loads by the means to increase their weight per meter, can be equipped with tensile reinforcements in the form of steel or plastic cables, which are embedded in the same way as the electrical conductors in the jacket of the suspension cable and in the region of attachment points of the suspension cables be fixed individually.

The attachment of the weight elements is preferably carried out in the delivery plant, which provides the components of the elevator. Of course, the weight elements can also be fixed only when installing the elevator on the suspension cable or on the suspension cables, which is useful especially in suspension cable arrangements, in which several suspension cables are connected by weight elements.

Claims (9)

1. Lift installation (101; 201) with at least one support means (107; 207), which comprises at least one cage run (107.1; 207.1) supporting a lift cage (103; 203) and at least one counterweight run (107.2; 207.2) supporting a counterweight (104; 204), wherein at least one hanging cable (109; 209.1; 209.2; 309; 409; 509; 609; 809) with integrated conductors for transmission of energy and/or control signals is present and is installed in the form of a hanging loop between a fixing point and the lift cage (103; 203) or the counterweight (104; 204), wherein for increasing the weight per metre of the hanging cable (109; 209.1; 209.2; 309; 409; 509; 609; 809) weight elements (311; 411; 511; 611; 811) are fixed to the outer side thereof, characterised in that the weight elements (311; 411; 511; 611; 811) are fixed to the hanging cable (309; 409; 509; 609; 809) at regular intervals.
2. Lift installation according to claim 1, characterised in that the hanging cable (309; 409; 509; 609) is a flat cable, wherein weight elements (311; 411; 511; 611; 811) are fixed on only one or on both flat sides.
3. Lift installation according to one of claims 1 and 2, characterised in that fastening holes (313), through which fastening elements (314, 414; 514) for fixing the weight elements (311; 411; 511) can be inserted, are present along the hanging cable.
4. Lift installation according to one of claims 1 and 2, characterised in that the weight elements (611; 811) along the hanging cable (609; 809) are fixed thereto exclusively by clamping fast.
5. Lift installation according to claim 4, characterised in that markings (817) facilitating positioning of the weight elements (811) at regular intervals are present along the hanging cable (809) at regular intervals.
6. Lift installation according to one of claims 1 to 5, characterised in that several hanging cables (809) arranged in parallel are connected together by plate-shaped weight elements (811).
7. Lift installation according to one of claims 1 to 6, characterised in that compensation for the weight difference between the cage runs (107.1; 207.1) and the counterweight runs (107.2; 207.2) of the support means (107; 207) is provided completely and exclusively by at least one hanging cable (109; 209; 309; 609; 709), which comprises means (311; 611; 719) for increasing its weight by metre.
8. Method for configuring or installing a lift installation (101; 201), in which at least one hanging cable (109; 209; 309; 509; 809) with integrated conductors (312) for transmission of energy and/or control signals is installed to hang between a fixing point and a lift cage (103; 203) or a counterweight (104; 204), wherein the weight per metre of the hanging cable (109; 209; 309; 509; 609; 809) is increased in that weight elements (311; 411; 511; 611; 811) are fixed to the outer side thereof, characterised in that weight elements (311; 511; 611; 811) are fixed along the hanging cable (109; 209; 309; 509; 609; 809) at regular intervals.
9. Method according to claim 8, characterised in that the weight per metre of the hanging cable (109; 209; 309; 509; 609) is adapted to a given installation configuration in that the spacing (a) between the individual weight elements (311; 511; 611; 811) or the weight of the individual weight elements (311; 511; 611; 811) or both the spacing and the weight of the weight elements (311; 511; 611; 811) is or are correspondingly selected.

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