DE102017113562A1 - Car with roller guide for an elevator system - Google Patents

Abstract

The invention relates to a car (200) for an elevator system (100), comprising at least one roller guide (250) for guiding the car (200) along a guide rail (110), wherein the at least one roller guide (250) has at least one first roller (260 ) arranged with its running surface (261) on a rolling surface (115, 116) of the guide rail (110), wherein the at least one roller guide (250) further comprises two second rollers (270) are arranged so that they with their respective running surface (271) on another rolling surface (115, 116) of the guide rail (110) are unrolled as the first roller (260), wherein the two second rollers (270) are in operative connection with each other in that they are mounted in opposite directions in the roller guide (250) with a directional component perpendicular to the associated rolling surface (115, 116) of the guide rail (110), and wherein the at least one Roller guide has exactly one first roller (260) or at least two first rollers, which are not in operative connection with each other so that they in the roller guide (250) each with a directional component perpendicular to the associated rolling surface (115, 116) of the guide rail (110) are mounted movable in opposite directions.

Description

The present invention relates to a car with a roller guide for an elevator system, which roller guide is used to guide the car along a guide rail, and such an elevator system.

State of the art

Cars are guided in elevator shafts by means of guides, in particular roller guides along guide rails A criterion for example, high ride comfort while driving in a car of an elevator system is a quiet, smooth ride.

In the guidance of cars by means of roller guides along guide rails, however, irregularities may occur when driving over bumps on the rolling surface of the guide rail or gaps between two sections of a guide rail. This leads to undesirable forces and accelerations on the rollers of the roller guides, which are transmitted to the car and thus reduce the ride comfort.

From the DE 10 2015 103 076 A1 For this purpose, for example, it is known to bring a plurality of rollers on a roller guide, which roll on a rolling surface of the guide rail, in operative connection with each other so that the lifting of a roller on the rolling surface has an opposite movement of the other roles result. When driving over bumps in this way, the entire movement of the roller guide can be reduced perpendicular to the guide rail.

Similar systems are for example from US 2 260 922 A and the JP 09194163 A known. There, two rollers of the roller guide, which bear against a rolling surface, connected by a rocker, these two rollers are then mounted on this rocker on the roller guide and thus the car.

In the applicant's so-called MULTI® system, several cars of an elevator system can be moved independently of one another in one or more shaft sections by means of a linear motor drive. An elevator system with several cars, which can change between manhole sections, for example, from DE 10 2014 224 323 A1 known. One of the major challenges is to design the entire system in such a way that a gap of the linear motor drive necessary for proper operation can be maintained despite any tolerances that may occur. A collision between the moving magnet (rotor) and the magnet coils (stator) located in the shaft should be avoided.

A challenge in this case is to maintain a defined air gap on the linear motor drive even when crossing gaps in the rail system, ie between two behind or adjacent sections of a guide rail (i.e., on a guide rail joint). These gaps are for example in the rotary or exchange unit, also referred to as Exchanger, via which, for example, a transfer of a car from a vertical to a horizontal shaft section can be made necessary to allow the free movement of the rotational movement. However, gaps can also occur at other locations in the rail system.

In addition to these gaps, high guide forces can lead to elastic deformations on guide rail joints, as a result of which loaded rolling surfaces can shift with respect to as yet unladen rolling surfaces of two sections of a guide rail. Such a shift between loaded and unloaded rolling surfaces can occur in particular in the case of a so-called backpack suspension, in which the car is held by a holding device in the form of a cantilever. There is thus a horizontal offset between the point of application of the holding force and the center of gravity of the car, so that a torque acts on the car.

From the WO 2016/083032 A1 For this purpose, it is known, for example, to avoid undesired, high forces on the roller and the rolling surface, in particular in the case of a longer standstill of the car, in that the car or the holding device is supported on the rolling surface or guide rail.

In order to be able to drive over such sections of guide rails displaced relative to one another with a roller guide as smoothly as possible, the corners or edges of the sections of the guide rail can be provided on the rail joint with chamfers or radii, for example. In this way, a crossing of the rail joint without or at least without relevant damage is possible. However, this results in a depression there, in which the wheel or roller sinks when driving over. This changes the engine gap. The degree of sinking is influenced by the gap size (distance of the guide rail sections), the roll size and the edge geometry.

Against this background, it is therefore desirable, in particular for cars with uneven loading of the rollers or rolling surfaces of the guide rail, a possible allow trouble-free driving over rail joints.

Disclosure of the invention

According to the invention, a car for an elevator system and an elevator system with the features of the independent claims are proposed. Advantageous embodiments are the subject of the dependent claims and the following description.

The invention is based on a car for an elevator system, which has at least one roller guide for guiding the car along a guide rail. Such a guide rail can in particular be composed of two or more individual sections. The roller guide has at least one first roller, which is arranged such that it can be unrolled with its running surface on a rolling surface of the guide rail.

According to the invention, it is now provided that the roller guide further comprises two second rollers, which are arranged such that they can be unrolled with their respective running surface on another rolling surface of the guide rail than the first roller. The rolling surface associated with the two second rollers and the rolling surface associated with the at least one first roller may in particular be opposite one another, preferably also parallel to one another. The two second rollers are in operative connection with each other such that they are mounted in the roller guide in each case with a direction component perpendicular to the associated rolling surface of the guide rail in opposite directions movable. In other words, upon movement of one of the two second rollers perpendicular to the associated rolling surface, the other of the two second rollers is forcibly moved in the opposite direction.

In addition, the at least one roller guide exactly on a first role. Alternatively, it has at least two first rollers, which are not in operative connection with each other, that they are mounted in the roller guide in each case with a direction component perpendicular to the associated rolling surface of the guide rail in opposite directions. In both variants - in contrast to the two second rollers - there is no such storage or operative connection, in which a counter-rotation is achieved. It should be noted that with just one role such a lack of active connection already comes about by the fact that there is no further first role.

Moreover, it is also advantageous if the at least one roller guide is arranged in such a way that a higher force acts on the two second rollers in the direction of the associated rolling surface when the car is guided on the guide rail than on the at least one first roller in the direction of the associated rolling surface. This applies in particular to the car and thus also the roller guide when he or she is aligned for a vertical movement (ie in the direction or against the direction of gravity). In particular, this can be achieved by means of a backpack suspension, which represents a particularly preferred configuration for the car according to the invention or the elevator system according to the invention.

In the proposed car, it is now achieved that, when driving over guide rail joints, the sinking of the roller resting against the rolling surface is reduced compared to a conventional roller guide with only one roller. Depending on the type of operative connection, the sinking, for example, can be reduced to half compared to a single role. In this way, in the case of a linear motor drive, the necessary air gap for proper operation can thus be kept much easier; In particular, collisions between stator and rotor can be avoided.

It should be noted that problems with the sinking of the roles only or at least especially in the more heavily loaded page are relevant. In this respect, for the other side, here the page with the at least one first role, no such design is necessary. In particular, it can therefore be provided that only exactly one first roller is provided, which in particular brings a weight and material savings.

Such an uneven loading of the roller guide comes about in particular in such a car, which has a holding device by means of which a holding force is exercised on the car, wherein between a point of application of the holding force and a center of gravity of the car, there is a horizontal offset, so when exercised holding force Torque acting on the car. In particular, the horizontal offset between the point of application of the holding force and the center of gravity can amount to at least 10%, preferably at least 20%, particularly preferably at least 30% of a maximum dimension of the car in the horizontal direction. Thus, there is an explicitly provided or accepted uneven load. This is the case in particular in the case of the so-called backpack suspension mentioned at the outset. Likewise, however, such holding devices can also be formed, for example, by a decentralized tether.

Advantageously, the two second rollers are connected to a rocker and the rocker in stored the roller guide. In other words, therefore, the operative connection, by which the two second rollers in the roller carrier are each mounted with a direction component perpendicular to the associated rolling surface of the guide rail in opposite directions, formed by the rocker and allows. In such a rocker may be, for example, a simple mechanical component, in which the two second rollers are each mounted at one end and which is supported by an intermediate bearing in the roller guide. It is expedient here if the rocker is mounted on a point of application (in particular a bearing) in the roller guide, which is in a range between 30% and 70%, preferably between 40% and 60%, particularly preferably in the middle, between the bearing points of the second Rollers on the see-saw lies. In a central point of attack, the sinking to half compared to a single role and thus maximally reduced.

Preferably, the car per guide rail on two roller guides, wherein the two second rollers of a roller guide belonging to a different rolling surface than the two second rollers of the other roller guide. In the case of the acting torque on the car, for example in the so-called backpack suspension, one of these roller guides can thus be arranged at one upper end (in the vertical direction) and the other at the lower end of the car per guide rail. The directions of the forces are exactly the opposite. Since a car is usually performed on two spaced guide rails, it is insofar also expedient to provide a total of four roller guides on the car.

It is advantageous if the running surface of the first roller has an electrically conductive material. In this way, the first role, which is in particular in the so-called. Backpack suspension, hardly exposed to stress, be used to remove any electrical charges from the car to the guide rail (ie to ground the car). In this way, for example, the operation of a linear motor drive is improved.

Likewise, it is advantageous if the running surface of the at least one first roller and / or the at least one first roller have a less rigid material than the running surfaces of the two second rollers and / or the two second rollers. A stiff material is here on the one hand due to the lower load is not necessary, on the other hand, the rolling behavior can be improved.

Preferably, the at least one first roller in the roller carrier with respect to a directional component perpendicular to the associated rolling surface of the guide rail is fixed permanently or at least during operation. Fixing means may be provided by means of which the at least one first roller in the roller carrier can be fixed with respect to a directional component perpendicular to the associated rolling surface of the guide rail. In this way, it is possible that the two second rollers and at the same time the at least one first roller can abut respectively on the associated rolling surface of the guide rail and so the car can be guided safely and stably.

The invention furthermore relates to an elevator system with at least one car according to the invention and with at least one guide rail, along which the at least one car is guided by means of the at least one roller guide.

In the case of two roller guides for the car, it is also advantageous if one of the roller guides are arranged at a vertically upper end and the other roller guide in a vertically lower end of the car. Likewise, it is advantageous if the at least one car can be moved along the guide rail by means of a linear motor drive.

With regard to the advantages and further advantageous embodiments of the elevator system, reference is made to the statements on the car to avoid repetition, which apply accordingly here.

Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

The invention is illustrated schematically with reference to an embodiment in the drawing and will be described below with reference to the drawing.

list of figures

• 1 schematically shows a car according to the invention of an elevator system in a preferred embodiment in longitudinal section.
• 2 schematically shows a roller guide of the car 1 in a more detailed view.
• 3 shows the roller guide 3 in another position on a rail joint.

Detailed description of the drawing

In 1 schematically is an inventive car 200 an elevator system 100 in a preferred embodiment shown in longitudinal section. From the elevator system 100 is for the sake of clarity next to the car 200 only one guide rail 110 with rolling surfaces 115 . 116 shown at which the car 200 by means of two roller guides 250 is guided. The guide rail 110 here has two separate sections 111 and 112 on between which there is a gap.

It is understood that a second guide rail can be provided which is spaced from (in the figure in a direction perpendicular to the plane of the drawing) and parallel to the guide rail shown 110 is. In particular, four of the roller guides are provided on the car. Likewise, the elevator system 100 have more cars, which can be moved in particular independently of the car shown.

The car 200 now has a cabin 210 , which can serve for the carriage of persons, as well as a holding device 220 , by means of which the cabin can be kept on. By means of the holding device 220 in the case shown, the cabin 210 using the on the fixture 220 attached roller guides 250 on the guide rail 110 held. The roller guides 250 each have a first role 260 and two second roles 270 on. For a more detailed description of the roller guide, reference is made at this point to the following figures.

It can be seen that the rolling surfaces 115 and 116 run parallel and the levels containing the rolling surfaces completely outside the cabin 210 run (in 1 to the left of the cabin). However, it is also conceivable that one or both of the levels containing the rolling surfaces the cabin 210 However, then divided by the respective level cabin volumes are not the same size, but preferably by at least 10%, 20%, 30%, ... differ.

The holding device comprises two components 221 and 222 by means of a swivel joint 223 are connected. The component 221 forms a holding frame (in the longitudinal section shown L-shaped) for the cabin 210 , the component 222 a carriage using the roller guides 250 on the guide rail 110 is guided.

On the sledge 221 is a permanent magnet arrangement 230 attached, along with several, along the guide rail 110 arranged coil arrangements 120 forms a linear motor drive. Using this linear motor drive is the car 200 thus movable along the guide rail.

For such a linear motor drive, it is now desired that a distance between the permanent magnet arrangement 230 and the coil arrangements 120 - And thus a distance between the carriage 222 and the guide rail 110 - remains as constant as possible or adheres to a defined value or range of values.

Through the swivel 223 is it possible for the sled 222 opposite the cabin 210 is twisted. Thus, for example, with constant orientation of the car, the car can also be moved along horizontally aligned rails. From a total of four roller guides - as mentioned - the higher force or load remains after such a rotation then two roller guides on the two second rollers, in the other two roller guides, however, the stronger force or load on the single first role. As the car moves in the horizontal but usually much less long and under less load or load, the resulting higher load and the stronger sinking can be neglected or accepted.

By the holding device shown 220 , with which a so-called backpack suspension is formed acts on the car, a torque M. This results from the fact that a through the holding device 220 on the car 200 applied holding force F horizontally offset from the center of gravity S of the car in which the weight G attacks is offset.

This leads to a different load on the roller guides on the two rolling surfaces 115 and 116 , While in the upper roller guide 250 the rollers that go to the rolling surface 116 belong, be more heavily loaded, are in the lower roller guide 250 the to the rolling surface 115 associated role stronger loaded. The roller guides 250 So are each arranged so that always on the two second rollers 270 the greater power works.

It is understood that this different load or torque can occur even when using a different holding device. For example, the holding force F can be exerted by a supporting cable engaging the carriage. For example, the holder and the carriage then not be movable, but rigidly connected to each other, in which case no rotation is possible.

In 2 is now schematically the upper roller guide 250 of the car 200 out 1 shown in a more detailed view. For the sake of completeness, it should be noted that the lower roller guide is arranged only reversed, so that the following description applies accordingly.

The roller guide 250 has a housing 251 on, on which the first roll 260 and the two second roles 270 are arranged. The first role 260 that has a tread 261 , possibly also with a covering, is with a bearing 262 rotatable or rotatable in a holder 265 stored. The holder 265 can here by means of fastening or fixing 266 For example, screws and nuts on the housing 251 be fixed. In particular, however, for example - in particular by the fastening or fixing means 266 an adjustment of this bracket 265 and thus the first role 260 in a direction perpendicular to the rolling surface of the section shown here 111 the guide rail are made possible.

The two second roles 270 , each with a tread 271 , possibly also with a coating, have, are with a rocker 280 connected with each other. Here, each of the second roles 270 each by means of a warehouse 272 at one end of the seesaw 280 rotatable or rotatable in the rocker 280 stored. The seesaw 280 again, by means of a warehouse 281 , which serves as a point of attack, on the case 251 rotatably or rotatably mounted. The camp or the point of attack 281 is here in the middle between the bearing points or bearings 272 arranged for the second rollers. In this way, the two second rollers 270 in the roll carrier 250 each with a directional component perpendicular to the associated rolling surface of the guide rail 110 (here is just the section 111 shown) mounted in opposite directions movable, in the figure so horizontally.

With continuous guide rail, as in 2 now has the point of attack 281 from the one to the two second rollers 270 belonging rolling surface of the guide rail a distance e. The sled 222 of which only one initial piece is shown, from the first to the first 260 belonging rolling surface a distance d.

In the position shown are both the first role 260 as well as the two second roles 270 each with their running surface (or a contact area thereof) on the respectively associated rolling surface of the guide rail. After applying the roller guide 250 on the guide rail, for example, the first role 260 using the fixing or fixing agents 266 adjusted accordingly and then fixed.

In 3 is now the role leadership 250 out 3 shown again, but in a different position and at a rail joint. Between the two sections 111 and 112 There is a gap in the guide rail, which is exaggerated to illustrate the present invention.

When the roller guide 250 , as shown here, encounters such a gap, due to the different loading of the first and second rollers one of the second rollers decreases 270 , here the upper one, into this gap. Because the other second role 270 , here the lower, continues to rest on the rolling surface of the guide rail, the rocker turns 280 around the point of attack or the camp 281 , By loading the roller guide 250 this is therefore moved in the direction of the force (in the figure to the right).

As a result, the distance e is reduced to the distance e 'and the distance d is increased to the distance d'. The initially mentioned air gap between the permanent magnet arrangement and the coil arrangement is thereby slightly increased. At the in 1 lower roller guide 250 , which is loaded and arranged vice versa, the air gap is slightly reduced when driving over a rail joint.

Because of the over the seesaw 280 connected and in the role leadership 250 stored two second rolls 270 However, the change in these distances e is smaller in magnitude - in the case shown, only half - than when using only a single role. The change in the air gap can thus be kept small in this way and collisions between the permanent magnet arrangement and the coil arrangement can thus be avoided.

In addition, the use of the two second rollers connected and mounted by means of the rocker also results in advantages with regard to the load of each second roller. In the case shown, the load of each of these rollers is approximately halved. In addition, the ride comfort is increased when the roller guide sinks when passing a gap less far. Correspondingly, the roller guide would be less lifted even when driving over a bump on the rolling surface.

Furthermore, the first role 260 be used for additional functions. So can the first role 260 even or just the tread 261 or a coating comprising an electrically conductive material. In this way, electric charges can be removed from the car on the rolling surface of the guide notes to remove any, the operation of the linear motor drive disturbing charges from the car. Because the first role 260 Moreover, it is hardly loaded, this can also be made of a softer or less rigid material than the second rollers 270 , A less rigid material allows a smoother rolling of the first roller and thus a more comfortable operation of the car.

In 4 are again the two second roles 270 the role guide shown. Here are the edges of the sections 111 and 112 the guide rail at the gap rounded or provided with a chamfer or a radius. In this way, any damage to the rollers when driving over the gap, especially if the sections 111 and 112 are shifted horizontally against each other, reduced or prevented. Although this reduces a role further in the gap as without such rounding of the edges. Here, the distance e is reduced to the distance e "However, by using the rocker and the two second rollers, the total change of the distance can still be kept well below the change when using only one roller - here also without rounding if necessary become.

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

• DE 102015103076 A1 [0004]
• US 2260922A [0005]
• JP 09194163 A [0005]
• DE 102014224323 A1 [0006]
• WO 2016/083032 Al [0009]

Claims (12)

An elevator car (200) for an elevator system (100) comprising at least one roller guide (250) for guiding the car (200) along a guide rail (110), the at least one roller guide (250) having at least one first roller (260) is arranged so that it with its running surface (261) on a rolling surface (115, 116) of the guide rail (110) is unrolled, characterized in that the at least one roller guide (250) further comprises two second rollers (270), the like arranged so that they can be unrolled with their respective running surface (271) on another rolling surface (115, 116) of the guide rail (110) than the first roller (260), the two second rollers (270) being in operative connection with each other, in that they are mounted in the roller guide (250) in each case with a direction component perpendicular to the associated rolling surface (115, 116) of the guide rail (110) in opposite directions, and wherein the at least one roller has exactly one first roller (260) or at least two first rollers, which are not in operative connection with each other in that they in the roller guide (250) each with a directional component perpendicular to the associated rolling surface (115, 116) of the guide rail (110) are mounted movable in opposite directions. Car (100) to Claim 1 , further comprising a holding device (220), by means of which on the car (200) a holding force (F) is exercisable, wherein between a point of application of the holding force and a center of gravity (S) of the car (200) is a horizontal offset, so when exerted Holding force (F) a torque (M) acts on the car (200). Car (100) to Claim 2 , wherein the horizontal offset between the point of application of the holding force (F) and the center of gravity (S) at least 10%, preferably at least 20%, more preferably at least 30% of a maximum dimension of the car in the horizontal direction. The elevator car (100) according to one of the preceding claims, wherein the two second rollers (270) are connected to a rocker (280) and supported by the rocker (280) in the roller guide (250). Car (100) to Claim 4 , wherein the rocker is mounted at a point of application (281) in the roller guide (250), which is in a range between 30% and 70%, preferably between 40% and 60%, more preferably centrally, between the bearing points (272) of the second Rollers (270) on the rocker (280) is located. Car (100) according to one of the preceding claims, wherein the two second rollers (270) and the first roller (260) on opposite, in particular parallel, rolling surfaces (115, 116) of the guide rail (110) are unrolled. Car (100) according to one of the preceding claims, with two roller guides (250) per guide rail, wherein the two second rollers (270) of one roller guide (250) to another rolling surface (115, 116) are associated with the two second rollers ( 270) of the other roller guide (250). Car (100) according to one of the preceding claims, wherein the running surface (261) of the at least one first roller comprises an electrically conductive material, and / or wherein the running surface (261) of the at least one first roller and / or the at least one first roller (26). 260) comprises a less rigid material than the running surfaces (271) of the two second rollers and / or the two second rollers (270). The elevator car (100) according to any one of the preceding claims, wherein the at least one first roller (260) is fixed in the roller guide (250) with respect to a directional component perpendicular to the associated rolling surface (115, 116) of the guide rail (110), and / or wherein fixing means (266) are provided, by means of which the at least one first roller (260) in the roller guide (250) with respect to a direction component perpendicular to the associated rolling surface (115, 116) of the guide rail (110) is fixable. Elevator system (100) with at least one car (100) according to one of the preceding claims and with at least one guide rail (110), along which the at least one car (200) is guided by means of the at least one roller guide (250). Elevator system (100) according to Claim 10 , in reference to Claim 6 wherein one of the roller guides (250) is disposed at a vertically upper end and the other roller guide (250) is disposed in a vertically lower end of the car (200). Elevator system (100) according to Claim 10 or 11 wherein the at least one car (200) by means of a linear motor drive (120, 230) along the guide rail (110) is movable.

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