WO2018060261A1

WO2018060261A1 - Freestanding guide rail for an elevator system, guide rail assembly, and elevator system comprising same

Info

Publication number: WO2018060261A1
Application number: PCT/EP2017/074519
Authority: WO
Inventors: Andrea CAMBRUZZI; Christian Studer; Philipp Zimmerli
Original assignee: Inventio Ag
Priority date: 2016-09-30
Filing date: 2017-09-27
Publication date: 2018-04-05
Also published as: EP3519340A1; CN109789996A; EP3519340B1; CN116477443A

Abstract

The invention relates to a freestanding guide rail (11) for an elevator system or a guide rail assembly composed of multiple such guide rails (11). The guide rail (11) has an elongated profiled element (17) which is to be detchably secured to a wall of an elevator shaft of the elevator system. The profiled element (17) consists largely of concrete, preferably fiber-reinforced high-performance concrete, and can optionally be reinforced with reinforcement elements (19). The guide rails (11) made of concrete can be produced as T-shaped profiled steel sections, which are conventionally used for this purpose, in a substantially less expensive manner and have sufficiently good mechanical properties upon a suitable material selection and machining.

Description

Free-standing guide rail for an elevator system as well

Guide rail assembly and elevator system with selbiger

description

The present invention relates to a guide rail for an elevator system and to a guide rail arrangement with such a guide rail or an elevator installation with such a guide rail.

Elevator systems are used to transport persons or objects within a structure between different levels or levels. For this purpose, an elevator car is displaced within a hoistway in the vertical direction or at least in a direction inclined to the horizontal. In a commonly used type of elevator systems, the cabin is using ropes or

Belt-containing support means held and these support means, for example, by means of a driven by a motor driven traction sheave, thereby also the elevator car can move within the hoistway. Thus, the elevator car during such a process is not excessive in

It is generally guided through at least one guide rail, preferably a plurality of guide rails, as elongated steel profiles, which are often T-shaped in cross-section, are conventionally used as guide rails are usually connected to a horizontal leg of the "T" or at least parallel to a wall of the

Elevator shaft attached. A vertical leg of the "T" projects therefrom in a direction perpendicular to the wall of the hoistway, so that side surfaces of this vertical leg extend parallel to an extension direction of the hoistway

Elevator shaft and can therefore serve as a guide surfaces for the movable in this direction elevator car. For example, guide shoes can be provided on the elevator car, in which rollers or sliding elements can be supported on these lateral surfaces of the T-shaped profile. The steel profiles conventionally used as guide rails can have advantageous mechanical properties with respect to their resilience and mechanical properties

Have resistance. However, steel as a material is relatively expensive. In particular, in elevators for tall buildings can therefore be provided therein

Guide rails make a significant contribution to the cost. In addition, steel is heavy, so that steel guide rails can be difficult to handle.

It has therefore been proposed to design guide rails for elevator installations with other materials. For example, EP 1 321 420 A1 describes a modular elevator shaft with guides for an elevator car which has at least two prefabricated modular roadway elements with roadways for the elevator car. The modular roadway elements can be designed as prefabricated concrete modules, be made integrated in the cabin guides in the concrete. In the described approach thus relatively large components in the form of modular roadway elements are prefabricated with concrete and then mounted in the shaft of an elevator system.

However, it was recognized that, for example, the handling of such a large

Roadway elements in the manufacture of an elevator system can be expensive. Furthermore, it has been recognized that in the practical implementation of the aforementioned idea, it may be difficult to form the relatively fine structures of the roadway elements which are to form a roadway with concrete, while providing sufficient mechanical stability of these roadway-forming structures as well as a sufficiently smooth To ensure surface of these lanes.

There may thus be a need for a guide rail for an elevator installation, which on the one hand can be manufactured inexpensively and which, on the other hand, can be easily and / or inexpensively mounted in an elevator shaft of an elevator installation and can thereby ensure sufficient mechanical stability. There may also be a need for a guide rail assembly having a plurality of such interconnected guide rails, which may preferably extend along the entire length of a hoistway. Furthermore, a need for a Elevator installation with such a guide rail or such

Guide rail arrangement consist.

Such a need can be met in each case with the subject matter of one of the independent claims. Advantageous embodiments are mentioned in the dependent claims and the following description.

According to a first aspect of the invention, a free-standing guide rail is proposed for an elevator installation which has an elongated profile body which can be detachably fastened to a wall of a hoistway of the elevator installation. The profile body consists mainly of concrete.

According to a second aspect of the invention, a guide rail arrangement is proposed, which has a plurality of guide rails according to embodiments of the first aspect of the invention, which are arranged one behind the other in the longitudinal direction of extension and with respect to lateral guide surfaces.

According to a third aspect of the invention, there is proposed an elevator installation comprising a hoistway and an elevator car, wherein at least one guide rail according to an embodiment of the first aspect of the invention or a guide rail arrangement according to an embodiment of the second aspect of the invention is mounted on walls of the hoistway.

Possible features and advantages of embodiments of the invention may be considered, inter alia, and without limiting the invention, as being based on the ideas and findings described below.

As briefly explained in the introduction, conventional guide rails for

Lift systems are usually designed in the form of steel profiles, which could be pre-produced and handled as free-standing components and then attached to a wall of the elevator shaft. In order to reduce the costs incurred in this case, it was alternatively proposed to make guide rails in concrete

To integrate roadway elements, but it has been observed that forming a relatively fine, a guide rail corresponding roadway structures to the relatively large concrete roadway elements at least difficult, in some cases appeared even impossible.

It is therefore proposed herein, form a guide rail for an elevator system again similar to conventional steel profiles as a freestanding device, but the guide rail not made of steel, but mainly made of concrete to manufacture.

This is based on the consideration or knowledge that, contrary to previously existing assumptions freestanding guide rails for elevator systems with their relatively small sized structures can still be made of a brittle and usually predominantly only on pressure resistant material such as concrete, provided that it is a suitable Processing of the concrete or suitable properties of the concrete is respected.

In this context, a free-standing guide rail for an elevator installation can be understood to mean a component which can be manufactured and handled independently of the elevator shaft and the walls surrounding the elevator shaft as an independent component. The freestanding

Guide rail can be prefabricated, for example, then be introduced into the already completed elevator shaft of the elevator system and ultimately there be attached to walls of the elevator shaft. An attachment can be made in a detachable manner, that is, a guide rail can be fastened, for example by means of screws or bolts to the wall of the elevator shaft and be reversibly released from this without it would be forcibly damaged when loosening.

The guide rail or the elongate profile body forming this has at least one preferably two surfaces, in particular in the form of at least one side surface, which in the assembled state can serve as a guide surface for an elevator car moving along it or another movable elevator component such as a counterweight , The at least one guide surface is preferably substantially smooth, so that, for example, a guide shoe with its rollers or sliding elements along this at least one guide surface can move with little friction. In this case, a guide rail in the longitudinal direction usually has dimensions of several meters, whereas dimensions of the profile body in directions transverse to this longitudinal direction should be relatively small, for example in the range of a few centimeters, in particular less than 30 cm or even less than 10 cm.

The profile body consists predominantly of concrete. "Mostly" is to be understood to mean that at least 50%, but preferably at least 80%, or even at least 90%, of the volume of the profile body consists of concrete The rest of the profile body may consist of other components In this case, outer surfaces of the profile body are preferably made of concrete, in other words components of the guide rail which are not made of concrete, such as, for example, a reinforcement inside the concrete

be included. In particular, the at least one, preferably two

Guide surfaces forming outer surfaces of the guide rail should preferably consist of concrete or at least predominantly be formed with concrete.

In this context, the term "concrete" can be broadly interpreted as a building material that is produced as a mixture of a binder and an aggregate, as a rule, at least cement can be used as the binder The aggregate is usually composed of gravel and / or In general, the addition of water causes the binder to chemically react, harden, and form a solid, disperse mixture of building materials, and it can be admixed with concrete admixtures and / or concrete admixtures to specifically influence the properties of the concrete.

According to one embodiment, the concrete used to form the profile body may be a high performance concrete.

High performance concrete, sometimes referred to as high strength concrete, has significantly improved compressive strength and / or durability over conventional concrete. Conventional concrete is known to be very well suited to withstand pressure loads, but can usually only tensile loads and / or shear loads in relatively small Withstand the dimensions. Most conventional concrete can, for example, at most

Withstand tensile loads that are less than 20%, usually even less than 10% of a maximum compressive strength.

However, for use in guide rails for elevator installations, it may be necessary for the material used for the guide rail to be able to withstand loads acting on the guide rail in the pulling or pushing direction to a considerable degree. It has therefore been found advantageous to form such guide rails, preferably with a high-performance concrete, which is optimized to be able to withstand such transversely or oppositely acting to a direction of pressure forces.

This can be achieved, inter alia, that the manufactured with high-performance concrete guide rail can withstand the considerable forces, as they are caused for example when attacking an emergency brake or safety brake of the elevator car on the guide rail on the guide rail. In addition, you can

High performance concrete types in contrast to usually very hard brittle conventional concrete also have a certain bendability or ductility, which should have a positive influence on the suitability for the formation of guide rails for elevator systems.

High performance concrete is extra compared to conventional concrete

Resistant to external mechanical or chemical stress and is characterized in general by a particularly dense and firm structure. For example, a high performance concrete may be a special concrete composition developed for high processing and / or usage requirements.

Related to the present application for the formation of a lift guide rail, the high performance concrete for high resistance to physical

Influences, especially against shear forces, be optimized.

Properties of high-performance concrete types are defined, for example, in DIN EN 206-1 in conjunction with DIN 1045-2. To obtain a high performance concrete, for example, an optimization of a concrete structure is required. Depending on the application, this can be achieved by minimizing the water cement value, an application

efficient flow agent to ensure processability and / or a optimal coordination of aggregate and cement stone properties can be achieved. For example, standard cements can be used for high-performance concrete types, the required cement contents for high-strength concretes generally being above those normal-strength concretes, usually between 380 kg / m ³ and 450 kg / m ³ . Through a targeted selection of suitable aggregates, a characteristic, preferably homogeneous structure of a high performance concrete can be achieved. The aim here is to minimize fracture mechanical differences between aggregates and cement paste and to ensure an optimal bond between aggregates and cement paste. Another characteristic difference in a composition of a high-performance concrete compared to normal concrete is usually in the addition of silicate fine dust, also called silica fume, microsilica or nanosilica. In this way, a compressive strength can be increased and a tightness of the structure can be increased. Also a bond between

Cement stone and aggregate can be improved. Typical is one

Addition amount of up to 10 M .-%. Alternatively or additionally, other microfillers may also be used, for example stone meal, carbon dust or very fine cement, ground fly ash or granulated blastfurnace slag. In principle, the effectiveness, the finer the filler is.

Furthermore, because of the low water-cement value of high-strength concrete, additives are usually required. Condensers and / or flow agents can produce a soft to flowable consistency of the concrete and safe processing

guarantee.

The guide rail can thus differ both structurally and functionally from the usually conventional concrete with regard to the high-performance concrete preferably used for its profile body, from which the walls of the elevator shaft are usually formed.

According to one embodiment, the concrete may be fiber reinforced.

A fiber-reinforced concrete can form a kind of composite by mechanically strengthening a surrounding structure of the concrete, especially the high performance concrete. As fibers here can be elongated thin structures of different Materials are used. In particular, the fibers may be made of metal, preferably steel. Alternatively, the fibers may be made of other man-made or natural materials, such as in the case of glass fibers,

Carbon fibers, aramid fibers, natural or synthetic textile fibers, etc. The fibers may typically have a diameter or cross-sectional dimensions in the range of 20 μιη to 2 mm, preferably in the range of 50 μιη to 1 mm, more preferably in the range of 0.1 mm to 0 , 5 mm. Typical lengths of the fibers may range from 5 mm to 50 cm, preferably from 1 to 20 cm, more preferably from 2 to 10 cm. The fibers can be homogeneously distributed within the microstructure of the concrete. In addition, the fibers within the

Microstructure of concrete should be oriented in any direction, preferably in

Be substantially isotropically oriented. The fibers can thus strengthen the concrete mechanically considerably and thus contribute to this even when thrust or

Tensile loads on the guide rail is not damaged, in particular does not break.

According to one embodiment, the profile body has a cross-section with a broad foot area at the bottom, an overhead narrow head area and preferably a body area connecting the foot area and the head area and widening towards the foot area.

In other words, the profile body in cross-section, that is transverse to its direction of elongation, be designed such that the top is a narrow

Head region is located, preferably form the lateral surfaces of the guide surfaces of the guide rail, and down to the head region of the

Body area connects, the width of which increasingly increases towards the bottom and then opens into the compared to the head area significantly wider foot area.

The terms "above" or "above" and "below" or "below" are to be interpreted only as a relative arrangement to each other clarifying and not be understood as absolute arrangements in space. In particular, these should

Conceptualities refer to a configuration in which the profile body is arranged with its foot area down and with its head area upwards. When using the profile body as a guide rail, however, this is in

Normally not horizontally lying, but arranged vertically standing, with the Foot area is arranged regularly directed to a wall of the elevator shaft and the head area is directed towards the center of the elevator shaft directed.

The head area is relatively narrow, for example, with a width of between 1, 5 cm and 3 cm, preferably a width between 17 mm and 25 mm. The width of the head region thus corresponds approximately to the width of the vertical leg of a T-shaped steel profile conventionally used as a guide rail or is only slightly, for example not more than 20%, wider than this. In the region of the head region, the cross section of the profile body thus corresponds to

Substantially that of the conventional T-profile, so that, for example, also conventionally trained guide shoes on the elevator car or the

Counterweight can be used or these need only be slightly modified.

The foot region of the profile body essentially corresponds in its function to the horizontal leg of a conventional T-shaped steel profile, that is to say it serves to be able to fasten the profile body, for example, to the wall of the elevator shaft or to any intermediate elements to be provided. To be able to derive the forces acting on the profile body forces well into the wall, while the foot area is much wider than the head area designed, for example, at least four times wider.

The head portion of the profile body is with the foot area over the

connected between body region. The body region preferably joins flush with the head region and widened towards the foot region, that is to say that it preferably has a conical shape in cross-section. As a result, forces acting on the head area can be discharged well and preferably without generating local force peaks on the foot area. In particular, the avoidance of local force peaks may be essential in a design of the profile body with concrete in order to avoid local fractures or splintering of concrete pieces.

According to one embodiment, the head region may have two side surfaces running parallel to one another. These parallel to each other

Side surfaces can guide surfaces formed by means of the profile body Form guide rail on which, for example, a guide shoe of the elevator car supported and can be performed along the vertically mounted in the installed state side surfaces. The mutually parallel side surfaces can have dimensions in a depth direction of several cm, preferably at least 5 cm, so that the guide shoe can support it well.

According to one embodiment, a reinforcement extending in the longitudinal direction of the guide rail is received in the profile body.

As a reinforcement, often referred to as a reinforcement, in this case an amplification of the concrete forming the profile body can be understood by another component. The reinforcing construction component can have a higher compressive or tensile strength or a greater durability against other environmental influences as the concrete itself.

Since concrete is usually only slightly resistant to tensile forces, it is often used in the direction of pull reinforcements. A reinforcement can in this case for example consist of iron, steel or other metallic materials. In particular, a reinforcement in the form of elongated iron or steel rods, sometimes also referred to as "iron" for short, may be provided, for example, diameters ranging from a few millimeters to a few centimeters, preferably from 0.5 centimeter to about 0.5 centimeter 2 cm, and in their length

for example, substantially corresponding to the length of the profile body of the guide rail, but at least typically be a few meters long. Alternatively, a reinforcement can also consist of textile structures such as carbon fibers or glass fibers.

For use as an elevator guide rail, it is considered advantageous to receive within the profile body a reinforcement in a direction parallel to the longitudinal direction of the guide rail. In this way, a resistance of the existing predominantly made of concrete profile body can be modified so that it can absorb, for example, in this longitudinal direction acting forces without damage. The longitudinal direction of the guide rail usually corresponds to the vertical direction and forces on the guide rail are in this vertical direction in particular then generated when a braking device, for example, the elevator car is supported when braking the elevator car on the lateral guide surface of the guide rail.

According to one embodiment, the reinforcement has at least one reinforcing element extending in the longitudinal direction, such as a reinforcing bar, in particular a reinforcing bar, which is arranged in a plane of the profile body which is neutral under thrust and traction.

The under thrust and train neutral plane of the profile body can in this

Relationship can be understood as follows: If shear forces or tensile forces are exerted transversely to the longitudinal direction of the profile body, this will bend as a rule. During such bending, portions or

Partial volumes of the profile body stretched and compressed other portions. Between these two subregions extends the under thrust and train neutral plane of the profile body, that is, a narrow range or, ideally, a

two-dimensional plane in which the profile body is neither stretched nor compressed. For homogeneous bodies of simple geometry, such a neutral plane lies in the

Generally at or near the geometric center of the body. For complex geometries and / or inhomogeneous bodies, the neutral plane may be far removed from the geometric center.

In the case of the herein presented guide rail, it is considered advantageous, in particular for the case that only one reinforcing element is arranged in the profile body to arrange this reinforcing element in the under thrust and train neutral plane of the profile body. In this way, on the one hand, it can be effected that the reinforcing element is not excessively deformed when thrust and tensile forces acting on the guide rail from the side. On the other hand, excessive mechanical stresses can be avoided within the profile body, which would otherwise occur if the reinforcing element would be located far away from the neutral plane of the profile body. Furthermore, so can

Deformations during manufacture, in particular the curing process can be avoided. Additionally or alternatively, according to one embodiment, the reinforcement has at least two reinforcing elements extending in the longitudinal direction, one of which is arranged below the plane which is neutral under thrust and traction and the other is arranged above this neutral plane.

In other words, in the event that more than one reinforcing element is provided in the profile body, it is considered advantageous not to arrange the reinforcing elements in the plane of the profile body which is neutral on push and pull. Instead, it seems advantageous, at least one each

Reinforcement to be arranged in mutually opposite to the neutral plane volume regions of the profile body and spaced from the neutral plane. In this way, in particular the flexural rigidity of the guide rail can be increased. The flexural rigidity can be increased all the more, the further the

Reinforcement elements spaced from the neutral plane can be arranged in the profile body.

According to one embodiment, the guide rail also has a pin protruding beyond a first end surface of the profile body and a recess extending into a second end surface of the profile body. The two frontal surfaces are located at opposite ends of the elongated profile body. At one end of the pin protrudes beyond the first frontal surface of the profile body, whereas at the opposite end of the recess extends into the there located second frontal surface of the profile body.

In one embodiment of the guide rail arrangement proposed herein, in which a plurality of guide rails are arranged one behind the other in the longitudinal direction, directly adjacent guide rails can then be plug-connected by means of the pin protruding from the first end face of a first guide rail and engaging in the recess of the opposite end face of the adjacent second guide rail.

In other words, the guide rails of a guide rail assembly can be connected to each other by the one of the end face of the Guide rails protruding pin is inserted into the recess of an opposite end face of the adjacent guide rail.

Such a connector can be designed to be mechanically highly resilient, so that forces between the adjacent guide rails can be passed.

In particular, according to an embodiment, the pin and the recess may be formed with geometries substantially complementary to each other. In this case, complementary geometries can be understood as meaning that the journal can be inserted into the depression, leaving at most a slight clearance or a slight gap between the journal and the depression. The pin can thus largely engage positively in the recess and thus form the desired connector similar to a plug-socket arrangement.

For example, the pin may be formed like a pin or bolt-like and protrude substantially in the longitudinal direction of the profile body of its one end face. The recess provided on the opposite end face can be made complementary to the pin, so that the pin can engage positively.

In this case, the pin and the recess may be arranged on the profile body such that adjacent profile body can be plugged into the depression engaging pins in such a way that their side surfaces flush with each other and adjacent to each other, that is, the side surfaces of the first profile body substantially smooth and without kinking to the side surfaces of the second

Connect profile body.

The pin can preferably be made of metal, in particular steel. Furthermore, the pin can connect directly to a recorded in the profile body reinforcement, that is adjacent to this, and optionally with the

Reinforcement be firmly connected, for example via a weld or a screw, so that acting on the pin forces can be derived to a large extent directly to the adjacent thereto reinforcement. If necessary, the Pins are formed by a over the end face of the profile body projecting portion of the reinforcement.

The depression on the opposite end surface of the profile body may possibly be reinforced with a bushing, preferably a metal bushing, in particular a steel bushing. Laterally caused by the pin forces or bending forces can be well received in such reinforced with a socket recess. In particular, the recess can be longitudinally to a in the

Connect profiled body to the reinforcement. In this case, a reinforcing jack directly adjacent to the reinforcement and optionally be firmly connected to the reinforcement, for example via a weld or a screw, so that forces can be passed well. The bush may in particular be made of metal, preferably of steel.

According to one embodiment of the guide rail arrangement directly adjacent guide rails can be glued to each other at adjacent end faces.

By such a bonding, the profile body adjacent guide rails can be firmly bonded together. The bonding can be provided in addition or alternatively to the previously described connector. An adhesive used for bonding the end faces can also fill, among other things, any gap between the adjacent guide rails and / or smooth a kink caused thereby, so that they serve as guide surfaces

Side surfaces of both guide rails as smoothly as possible adjacent to each other. As an adhesive, in particular epoxy resin or polyurethane (PU) can be used.

Optionally, additives such as fillers or the like may be added to the adhesive to suitably modify its physical properties.

According to one embodiment of the guide rail arrangement, adjacent guide rails are fastened in a side area adjacent to mutually opposite end faces in each case on a common connection plate. In other words, adjacent guide rails can be connected to each other as an alternative or in addition to a mechanical connection by a mating or gluing together using a connecting plate. Such

Connecting plate is also sometimes referred to as "fish plate" in lift construction The connecting plate extends parallel to the two elongated profile bodies of the adjacent guide rails and is preferably fastened to their respective side surfaces Side surface adjacent to an end face of the first profile body up into a region of a side surface adjacent to the opposite end face of the second profile body.The connecting plate with two profile bodies is mechanically strong connected example, can be arranged in the profile bodies screws or nuts, so that the side The screws or nuts can for example be embedded in concrete in the respective profile body.

Embodiments of the previously described guide rail or

Guide rail assembly can be prefabricated as separate components, in particular concreted, and then mounted on a wall of a hoistway. The guide rail or guide rail arrangement can be similar to

conventional T-steel profiles are bolted to the wall, for example.

In particular, conventionally used brackets (English: "brackets") can be used to clamp guide rails, for example, positively and / or positively clamped and thus adjustable in position and optionally reversibly releasably attached to the wall.

It should be understood that some of the possible features and advantages of the invention are described herein with reference to different embodiments. In particular, embodiments are described in part with reference to a guide rail, partially with respect to a guide rail assembly and partly with respect to an elevator installation. One skilled in the art will recognize that the features are suitable

Combined, transmitted, adapted or exchanged, in order to arrive at further embodiments of the invention. Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings, wherein neither the drawings nor the

Description are to be construed as limiting the invention.

Fig. 1 shows a portion of an elevator system.

Fig. 2 shows a perspective view of a guide rail according to the invention.

Fig. 3 (a) to (c) show cross sections through guide rails according to the invention.

Fig. 4 (a) to (c) show longitudinal sections through guide rails according to the invention.

Fig. 5 shows two to be coupled to a guide rail assembly according to the invention guide rails.

The figures are only schematic and not to scale. Like reference numerals designate like or equivalent features throughout the several figures.

Fig. 1 shows an elevator system 1, wherein an elevator car 3 within a

Elevator shaft 5 can be moved vertically. The elevator car 3 is both held by a belt-like or rope-like support means 7 and displaced within the elevator shaft 5.

To enter during the relocation of the elevator car 3 in the vertical direction

To prevent uncontrolled rocking of the elevator car 3 in the horizontal direction, 5 guide rails 11 are mounted on walls 9 of the elevator shaft. These guide rails 11 extend substantially over the entire vertical travel path of the elevator car 3. At the elevator car 3 guide shoes 13 are mounted, which cooperate with one of the guide rails 11 respectively. The guide shoes 13 can rest on the guide rail 11 or its guide surfaces 15 and / or embrace them. In this case, provided in a guide shoe 13 rollers or sliding elements along the guide surfaces 15 roll or slide. While guide rails 11 were conventionally usually designed as T-shaped steel profiles, an embodiment of a guide rail 11 according to the invention is shown in perspective in FIG. The guide rail 11 is characterized in that it has a free-standing component over a profile body 17, which consists predominantly of concrete, in particular high-performance concrete, which optionally for further

Stabilization can be fiber reinforced consists. In the elongated profile body 17 at least one reinforcing element 19 is received, for example in the form of an elongated, rod-like reinforcing iron. The profile body 17 has an overhead narrow head region 21, a broad foot region 25 lying below, and a body region 23 arranged between the head region 21 and the foot region 25 and widening towards the foot region 25. Lateral surfaces of the head portion 21 thereby form the guide surfaces 15, along which a guide shoe 13 can be guided. In Figs. 3 (a) to (c) are cross sections of various embodiments of

Guide rails 11 shown.

In addition to the concrete used mainly for the formation of the profile body 17, profile rails 11 according to the invention differ from conventional T-steel profiles, in general, both by the shape of their cross section and by the dimensions realized thereby. Both take into account the significantly different material properties of concrete compared to steel. In particular, the body region 23, which widens toward the foot region 25 and has a conical cross-section, can be configured as uniformly as possible and without local force concentrations in the head region 21 from a guide shoe 13

Foot area 25 and ultimately over this in an adjacent thereto

Derive elevator shaft wall 9.

As illustrated in FIG. 3 (a), the head region 21 can have a width d1 which, due to the lower strength of concrete, is usually somewhat larger than steel, compared to steel, and is typically in the range of 15 to 25 mm. preferably in the range of 17 to 21 mm. A height hl of

Head portion 21 and thus a width of the guide surface 15 should be chosen sufficiently large that a guide shoe 13 can attack it well. Typically, can the height hl be between 20 and 40 mm, preferably about 30 mm. At an upper end, where the body portion 23 is adjacent to the head portion 21, this has the same width hl as the head portion 21. Down widens the

Body area 23, however, for example, up to twice or more of this width hl. The adjoining foot area 25 can be two laterally over the body area

Form 23 protruding flanks 27 and thereby have a significantly greater width d2 than the widest point of the body portion 23. For example, the width d2 may be between 80 and 100 mm, preferably about 90 mm. A height h3 of the foot region 25 or the flange 27 may typically be between 10 and 20 mm, preferably between 14 and 16 mm.

In the embodiment shown in Fig. 3 (a), only a single one is shown

Reinforcement element 19 received in the profile body 17. This extends longitudinally through the body portion 23. In this case, the reinforcing element 19 is approximately in the plane neutral to thrust and train 29 (shown in phantom) of the profile body 17 is arranged. The reinforcing element 19 may be designed, for example, as a round iron rod. It may have a diameter of, for example, between 6 and 14 mm, preferably about 9 to 11 mm. In the embodiment shown in Fig. 3 (b), two reinforcing elements 19 are provided. Both reinforcing elements 19 are arranged approximately in the plane neutral to push and pull plane 29 of the profile body 17 and with a center distance d3 of, for example, between 10 and 30 mm, preferably about 15 mm, spaced from each other. Each of the reinforcing elements 19 can, for example, a

Diameter of 4 to 8 mm, preferably about 6 mm.

3 (c), two spaced-apart reinforcement elements 19 ', 19 "are likewise accommodated in the profile body 17. However, these reinforcement elements 19', 19" are not arranged in the plane 29 which is neutral on push and pull. Instead, a reinforcement element 19 'is below this neutral one

Level 29 and the other reinforcing element 19 "arranged above this neutral plane 29. For example, the lower reinforcing element 19 'with a

Height distance h4, for example, 5 to 20 mm, preferably about 10 mm, be arranged from a lower edge of the profile body 17 and the upper reinforcing element 19 "can be spaced apart from the upper edge of the profile body 17 with a similar height spacing h5. Both reinforcing elements 19 ', 19" are spaced significantly more than 10 mm from the neutral plane 29 and can thus have both a strength and a flexural rigidity of the guide rail 11 increase significantly. Each of the reinforcing elements 19 ', 19 "may have, for example, a diameter of 4 to 8 mm, preferably about 6 mm.

In all three embodiments of FIGS. 3 (a) to (c), a longitudinally extending indentation 31 is formed approximately centrally on a lower side of the foot region 25. Depending on the embodiment, this elongated indentation 31 can only be a few mm deep to well over 1 cm deep. Among other things, she can become one

more uniform force dissipation of acting on the head portion 21 forces in the foot region 25 and the flanks 27 contribute. Furthermore, in the production of the profile body 17 by pouring concrete into a mold, such a recess 31 can have the effect that no relatively large volumes of concrete need to be hardened, possibly resulting in undesirable effects such as mechanical stresses.

In FIGS. 4 (a) to (c), longitudinal sections through various embodiments of profile rails 11 are shown. In the elongate profile body 17, an elongated reinforcing element 19 is received in each case. At a first end face 33 of the profile body is a pin 37 via. In an opposite end face 35, a recess 39 is formed. The pin 37 and the recess 39 lie on a same line as the reinforcing element 19 and limits preferably directly to this. The pin 37 may be formed, for example, as a metal pin. In the recess 39, a sleeve 41 may be inserted. A geometry of the pin 37 and the recess 39 and the sleeve 41 surrounding it can be designed to be complementary to one another in such a way that they can be plugged into each other as positively as possible and with at most little play.

In FIGS. 4 (a) to (c), different embodiments of sleeves 41 are shown, which are supported in a different manner on an adjacent end of the reinforcement element 19 or surround it locally. Both the sleeves 41 and the pins 37 may optionally be connected to or adjacent thereto welded reinforcing element 19 between them welded, screwed or otherwise mechanically strong connected.

FIG. 5 shows a perspective partial view of a guide rail arrangement 43 composed of two guide rails 11. The guide rails 11 are arranged one behind the other in the longitudinal direction of extension, and in particular the side surfaces of the guide rails 11 serving as guide surfaces 15 are aligned with one another.

In order to connect the two guide rails 11 with each other in a mechanically loadable manner, the pin 37 projecting from the one end face 33 of the one profile body 17 is positively inserted into the recess 39 formed on the opposite end face 35 of the other profile body 17. Optionally, the opposing end faces 33, 35 and / or the protruding therefrom pins 37 and recesses 39 are glued together, for example by using epoxy resin.

In order to be able to connect the two interconnected guide rails 11 to one another in a particularly resilient manner against attacking bending forces, a connecting plate 45 in the form of a fish plate may also be provided, which abuts against side surfaces of the two guide rails 11 and can be mechanically connected thereto. In particular, the connection plate 45 may be attached to downwardly facing surfaces of the foot portions 25 in side regions adjacent the opposing end surfaces 33, 35. For this purpose, 45 of the connecting plate bolts or screws 47 protrude, for example, in nuts 49 or inserts in each of the guide rails 11 engage and can be firmly connected with these. For example, the nuts 49 or inserts can be poured into the concrete of the respective profile body 17. Alternatively, screws or bolts can be poured into the concrete of the profile body 17 and then fastened by means of suitable nuts or other counterparts to the connecting plate 45.

The proposed guide rails 11 and guide assemblies 43 can be mounted in a hoistway 5 in a manner similar to conventional T-steel profiles. For example, brackets can be the laterally projecting Flanks cover 27 of the foot portion 25 of the profile body 17 and secured with screws or bolts to the walls 9. The guide rail assembly 43 may then serve in substantially the same way as conventional guide rail assemblies for guiding guide shoes 13 of the elevator car 3. In order to provide a smooth transition between adjacent guide rails 11, the two guide rails 11 can be glued together and thereby a gap between these two are filled with adhesive. The adhesive may be epoxy or polyurethane, possibly with the addition of quartz sand. To the in comparison to T-steel profiles other physical properties of

Concrete guide rails 11 to be able to account

Safety devices such as a safety brake of the elevator car 3, which should be supported in the actuation case on the guide rail 11, to be adjusted. For example, a braking surface with which such a catch brake is intended to rest against the guide rail 11, be enlarged and / or covered with a protective layer, for example made of plastic, to excessive pressures on the

Guide rail 11, in particular locally concentrated pressures to avoid.

The proposed, mainly made of concrete guide rail 11 can be easily and in particular inexpensively manufactured. Furthermore, it can be easily handled and mounted due to its lower weight relative to steel rails.

Finally, it should be noted that terms such as "comprising,""comprising," etc., do not exclude other elements or steps, and terms such as "a" or "an" do not exclude a variety. It should also be appreciated that features or steps described with reference to any of the above embodiments may also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be considered as limiting. Reference list

1 elevator system

3 elevator cab

5 elevator shaft

7 suspension

9 shaft wall

11 guide rail

13 brake shoe

15 guide surface

17 profile body

19 reinforcement element

21 head area

23 wheat section

25 foot range

27 flank

29 neutral level

31 indentation

33 first face

35 second face

37 cones

39 deepening

41 sleeve

43 guide rail assembly;

45 connection plate

47 screws

49 nuts

Claims

claims

A freestanding guide rail (11) for an elevator installation (1), comprising an elongate profile body (17) which is releasably secured to a wall (9) of a hoistway (5) of the elevator installation (1), the profile body (17) consists mainly of concrete, wherein at least one guide surface (15) of the guide rail (11) is formed at least predominantly of concrete.

2. Guide rail according to claim 1, wherein the concrete is a high performance concrete.

3. Guide rail according to one of the preceding claims, wherein the concrete is fiber reinforced.

4. Guide rail according to one of the preceding claims, wherein the profile body (17) has a cross section with an underlying broad foot area (25), an overhead narrow head portion (21) and preferably one of the foot portion (25) and the head portion (21) connecting and towards the foot area (25) widening body area (23).

5. Guide rail according to claim 4, wherein the head region (21) has two mutually parallel lateral guide surfaces (15).

6. Guide rail according to one of the preceding claims, wherein in the profile body (17) has a longitudinally extending reinforcement is added.

7. Guide rail according to claim 6, wherein the reinforcement has at least one longitudinally extending reinforcing element (19) which is arranged in a neutral under thrust and train plane (29) of the profile body (17).

8. Guide rail according to claim 6 or 7, wherein the reinforcement has at least two longitudinally extending reinforcing elements (19 ', 19 "), one of which (19') below a thrust and neutral train (29) of the profile body (17). is arranged and the other (19 ") above the in a thrust and train neutral Level (29) of the profile body (17) is arranged.

9. Guide rail according to one of the preceding claims, further comprising a first frontal surface (33) of the profile body (17) projecting pin (37) and in a second end face (35) of the profile body (17) reaching into recess (39 ).

10. Guide rail according to claim 9, wherein the pin (37) and the recess (39) are formed with mutually substantially complementary geometries.

11. guide rail assembly (43), comprising a plurality of guide rails (11) according to one of claims 1 to 10, which are arranged one behind the other in the longitudinal direction of extension and with respect to lateral guide surfaces (15) in alignment.

12. guide rail assembly according to claim 11, wherein directly adjacent guide rails (11) by means of one of an end face (33) of a guide rail (11) and projecting into a recess (39) in an opposite end face (35) of the adjacent guide rail (11) engaging pin (37) are plugged.

13. Guide rail arrangement according to one of claims 11 and 12, wherein directly adjacent guide rails (11) on adjacent end faces (33, 35) are glued together.

14. Guide rail arrangement according to one of claims 11 to 13, wherein adjacent guide rails (11) in a side region adjacent to opposite end faces (33, 35) are each attached to a common connection plate (45).

15. Elevator installation (1), comprising an elevator shaft (5) and an elevator car (3), wherein on walls (9) of the elevator shaft (5) at least one guide rail (11) according to one of claims 1 to 10 or a guide rail arrangement (43) according to any one of claims 11 to 14 is attached.