EP3286124B1 - Carrier unit for a lift facility - Google Patents

Description

FIELD OF THE INVENTION

The present invention relates to a carrier unit for an elevator installation. The carrier unit is used to attach a deflection roller to a support structure, as it can be used in particular for supporting a car or a counterweight in an elevator system. Furthermore, the invention relates to an elevator installation with such a carrier unit.

BACKGROUND OF THE INVENTION

Elevator systems typically comprise at least one elevator car and one counterweight, which are arranged in an elevator shaft and can be moved in opposite directions. The elevator car and the counterweight are held or moved by means of one or more suspension means, for example in the form of ropes or straps. The suspension elements are usually connected at their ends to a fixed structure within the elevator shaft and run around deflection rollers, which are fastened as part of a carrier unit to a carrier structure of the elevator car or of the counterweight. The support means can be driven by a drive, for example in the form of an electric motor. Due to the arrangement described with pulleys, which are attached as part of a carrier unit to support structures of the car or the counterweight, this pulley assemblies arise, so that a force to be effected by the drive on the or the support means can be kept sufficiently low.

Examples of elevator installations and carrier units used therein are inter alia in WO 2011/012504 . CN 203682813 and CN 103787169 described.

SUMMARY OF THE INVENTION AND EMBODIMENTS

Among other things, there may be a need for an elevator installation and, in particular, for a support unit to be provided therein, which have improved operational safety. Furthermore, there may be a need for a carrier unit which is relatively simple in construction, has a low weight and / or is easy to assemble or maintain.

Such a need can be met by a carrier unit according to the independent claim as well as an elevator installation employing this carrier unit. Advantageous embodiments are defined in the dependent claims.

According to one aspect of the invention, a carrier unit for an elevator installation for fastening a deflection roller to a support structure is proposed, which has two yoke spars and a bearing. The Jochholme are arranged parallel to each other and to attach to the support structure. At least portions of the deflection roller are arranged in a space between the Jochholmen. The deflection roller is rotatably supported by means of said storage with respect to the Jochholme. The Jochholme, the guide roller and the bearing are adapted to transmit a suspension by the support means on the pulley carrying capacity in an upwardly directed support direction on the support structure to carry a fixed to the support structure mass against a gravitational force or move. The carrier unit is characterized in that at least two retaining fuses are further provided on the carrier unit, which are each attached to the Jochholmen and which protrude into the space between the Jochholmen such that they form a stop in case of failure of the storage to the deflection roller to prevent a movement caused by the carrying capacity in the supporting direction.

Possible features and advantages of embodiments of the invention may be considered, inter alia, as being based on ideas and findings described below.

Internal risk analyzes by the inventors have shown that an operational safety of a lift installation can be significantly increased if, for example, a support of a deflection roller fails on a carrier unit, it is ensured that the deflection roller can not be detached from the rest of the carrier unit.

It is therefore proposed to provide Jochholmen the carrier unit additional retention devices. The retention restraints should be designed as far as possible in terms of their positioning and in terms of their mechanical strength such that they protrude into the space between the Jochholmen, in which the deflection roller is arranged, such. in the event that the pulley dissolves from its storage, hold the pulley to the Jochholmen.

In this way, it is thus possible to prevent the deflection roller from being displaced from the remainder of the roller attachment due to a bearing force exerted on it by the suspension element, for example. in particular from the yoke spars attached to the support structure. A counterweight held on the carrier structure can thus be prevented from falling due to an additional safeguard provided by the retaining device.

Preferably, the retention fences and their attachment to the Jochholmen are designed such that they prevent the deflection roller at a by a load capacity of up to 250 kN, preferably at one by a by a load between 20 and 210 kN, effected movement in the supporting direction. In other words, the restraint restraints should be designed in terms of their mechanical strength suitable that they can withstand the typically occurring in an elevator forces acting on a pulley and are normally absorbed by their storage, in case of failure of storage. In other words, the restraint retainers should be sturdy enough that, in the event that the diverting pulley is no longer held by the support, they hold the diverting pulley and thus prevent it from coming off the carrier unit.

The retention devices are preferably attached directly to the Jochholmen. For example, the retention fences can intervene in provided in the Jochholmen holes or recesses. As a result, it can be ensured that the considerable forces that occur, for example, in the case of a bearing damage, which are then exerted on the restraint restraints by the deflection roller, are directly related to those in general be guided mechanically stable Jochholme.

The retention devices can be described as relatively simple components such as e.g. be formed bolt-like pins. For example, such bolt-like pins in the form of screws, bolts, split pins or the like can be attached to the Jochholmen. A material and a material thickness may be suitably selected to achieve required load capacities of the retention devices. For example, the retention devices may consist of metal, in particular steel or high-strength alloys. Typical material thicknesses may range from 0.2cm to 10cm, preferably 0.5cm to 3cm.

According to one embodiment, the retention devices are each attached to both opposing Jochholmen and each span the gap between the Jochholmen completely. In other words, ends, for example, bolt-like retention fuses are each attached to one of the Jochholme, so that the respective retention device is supported and held at both ends.

According to one embodiment, the retention devices are arranged in the supporting direction above the storage. In other words, the retaining retainers may be attached to the yoke spars at a position to which the deflecting pulley moves in the event that it is no longer held by its bearing. If the bearing fails, the guide roller can thus move slightly up to the retention fences and is then prevented by these on a further movement and thus on a release of the carrier unit. The restraints are charged by the pulley primarily on pressure.

In a specific embodiment, the deflection roller is at least approximately cylindrical and has a diameter D. The retention fences should then, in relation to a direction parallel to the diameter D, protrude into the intermediate space at a distance d which is smaller than the diameter D, ie d <D. In other words, the retention retainers can be arranged, for example, in the direction of support above the bearing of the deflection roller be, ie where a chord is shorter by the pulley in a direction parallel to the Jochholmen than the diameter of the pulley. The retention fences can there relatively close to an outer circumference the deflection roller be arranged so that their distance d from each other in the direction parallel to the Jochholmen is shorter than the diameter D of the guide roller. For example, the distance d may be between 2% and 80%, preferably between 5% and 50%, and more preferably between 10% and 30%, smaller than the diameter D of the diverting pulley.

If the pulley should, for example, be released from its storage, it will thus move slightly due to the forces acting on it in the upward direction of support, but then stopped by the retention fuses and quasi clamped between them. Due to their larger diameter D, the guide roller can not move between the spaced apart at the narrower distance d retention fuses and is thus held on the Jochholmen.

According to one embodiment, the storage is arranged below the Jochholme. In principle, it is possible that both the retention devices and the storage of the deflection roller are attached directly to the Jochholmen. However, in the previously described embodiment, in which the retention devices are to be arranged sufficiently above the bearing, this can lead to the yoke spars having to have a comparatively large height in the direction of support. In general, however, the Jochholme are preferably dimensioned so that they meet on the one hand load requirements, for example, for use within an elevator system, but on the other hand no unnecessary use of material, for example in the form of excessively wide or high Jochholme leads to unnecessary costs. In order to be able to sufficiently space the storage of the deflection roller from the retention devices to be provided directly in the Joch bars for reasons of stability, it may therefore be advantageous to arrange the bearing of the deflection roller below the Joch bars. The storage can only indirectly, i. For example, via additional intermediate elements, connected to the Jochholmen and held on this.

For example, each of the Jochholme each be attached to a downwardly extending bearing support and bearings that form the storage, each attached to one of the bearing mounts. The bearing mounts may be provided, for example in the form of sheets or profiles, which extend adjacent to both end faces of the guide roller and, for example, at one edge to the Jochholmen are attached. In the bearing brackets, the bearings can be kept in recesses, for example. Alternatively, the bearings may be fastened to the bearing brackets, for example by means of suitable fastening devices.

It should be understood that some of the possible features and advantages of the invention will be described herein with reference to different embodiments, particularly with respect to a carrier unit or to an elevator installation employing such a carrier unit. A person skilled in the art will recognize that the features can be suitably combined, adapted or replaced in order to arrive at further embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS:

• Embodiments of the invention will now be described with reference to the accompanying drawings, in which neither the drawings nor the description are to be construed as limiting the invention.
• Fig. 1 illustrates basic principles of an elevator system.
• Fig. 2 shows a perspective view of a carrier unit according to an embodiment of the present invention.
• Fig. 3 shows a side view of the carrier unit Fig. 2 ,
• Fig. 4 shows a sectional view through the carrier unit Fig. 2 along the line AA.
• Fig. 5 shows a perspective view of a carrier unit according to another embodiment of the present invention.
• Fig. 6 shows a side view of the carrier unit Fig. 5 ,
• Fig. 7 shows a sectional view through the carrier unit Fig. 5 along the line AA.

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

DESCRIPTION OF EMBODIMENTS OF THE INVENTION:

FIG. 1 shows roughly schematically an elevator system 100. In an elevator shaft 102, an elevator car 104 and a counterweight 106 are arranged. The elevator car 104 and the counterweight 106 are connected to each other via a support means 108 in the form of one or more straps or ropes. Ends 110 of the support means 108 are each connected to a fixed in the hoistway 102 support structure 112. On the support structure 112, a drive unit 114 is further provided with driven by an electric motor traction sheaves.

Both at the elevator car 104 and the counterweight 106, a guide roller 5 is provided in each case. The deflection rollers 5 are each part of a carrier unit 1 and mechanically connected thereto by means of a carrier structure 13 with the elevator car 104 or the counterweight 106. The carrier structure 13 of the elevator car 104 has side shields 116, which are fastened at their upper ends to bars 3 of the carrier unit 1. At the lower ends of the side shields 116, a lower yoke 118 is fastened, which supports the elevator car 104 via supports 120.

The support means 108 extends from an end 110 fixed to the support structure 112 coming first down and then around the guide roller 5 of the counterweight 106 around, is then returned upwards to the drive unit 114, where it passes over the traction sheaves. Subsequently, the support means 108 then further extends downwardly to and around the diverting pulley 5 on the elevator car 104 and finally back up to the support structure 112, where it is fastened with its opposite end 110.

In the FIGS. 2, 3 and 4 is a support unit 1 for an elevator car according to an embodiment of the present invention in a perspective view, side view and sectional view taken along the line AA FIG. 3 shown. The carrier unit described below could in principle also be associated with a counterweight.

The carrier unit 1 has two Jochholme 3, a guide roller 5 and a bearing 7. The Jochholme 3 each consist of an elongated and cross-sectionally U-shaped steel profile. A dimensioning of this steel profile is chosen according to the loads to be borne by him. For example, the Jochholme 3 have a height h in the range of 10 to 30cm. A material thickness of the steel profile used for the Jochholme 3 can significantly more than 2mm, preferably more than 5mm, have. The two Jochholme 3 are arranged parallel to each other, so that between them, a gap 11 is formed. A distance between the two Jochholmen 3 and thus a width of the intermediate space 11 may for example be in the range of 5 to 50cm, preferably 10 to 20cm, so that at least portions of the guide roller 5 can be accommodated in this gap 11.

At opposite ends of the Jochholme 3 a plurality of sheets 15, 17 are provided, which are part of a support structure 13, by means of which the support unit 1 and in particular their Jochholme 3, for example, to an elevator car 104 or a counterweight 106 can be attached.

The deflection roller 5 is attached as part of the support unit 1 via the bearing 7 to the Jochholmen 3. The guide roller 5 has a cylindrical shape, wherein a diameter D of the guide roller 5 is usually greater than an axial length. On a lateral surface of the guide roller 5 grooves 19 are provided. The support means 108 can extend over parts of this lateral surface, wherein the grooves 19 can contribute to the fact that the support means 108 is guided correctly on the deflection roller 5 and, for example, does not slip in its axial direction.

The bearing 7, via which the guide roller 5 is held on the rest of the carrier unit 1, is arranged below the Jochholme 3 in the illustrated embodiment. Of the Jochholmen 3 extend adjacent to end faces of the guide roller 5 extending retaining plates 21 which are stably fixed to the Jochholmen 3 and which form a bearing holder 20. In the retaining plates 21, a recess 22 is provided at mutually opposite positions relative to the deflection roller 5 received therebetween, within which an axis 23 is held engaging. The axis 23 is by means of fixing plates 27 and one or more screws 29 in Fixed to the retaining plates 21. About cylindrical roller bearing 25, the guide roller 5 is rotatably mounted on the axis 23. Overall, the axis 23 and the cylindrical roller bearings 25 are bearings 30, which are mounted on the bearing bracket 20 spaced down to the Jochholmen 3. Of course, instead of cylindrical roller bearings ball bearings or other bearings could be used. Also plain bearings would be conceivable. The axis 23 extends substantially perpendicular to a longitudinal direction of the Jochholme 3, so that the guide roller 5 is rotatably mounted in the intermediate space 11 between the Jochholmen 3 via the bearing 7.

The Jochholme 3, the guide roller 5 and the bearing 7 are cooperatively designed so that a caused by the support means 108 on the guide roller 5 carrying capacity can be transmitted to the support structure 13 ultimately. The carrying capacity acts in an upwardly directed support direction 31 and can typically assume values of a few kN in lift installations. The carrying capacity corresponds to a counterforce which is required, for example, to hold or move a mass of the elevator car 104 fastened to the carrier structure 13 counter to a weight force. Forces, such as in particular the said carrying capacity, are within the carrier unit 1 due to a sufficient dimensioning of all supporting components, ie in particular the Jochholme 3, the guide roller 5 and the bearing 7 forming components 20 to 30, of which the guide roller 5 embracing support means 108 finally transferred to the support structure 13.

A provided above the guide roller 5 cover plate 33 has essentially no supporting function, but only serves to protect the underlying deflection roller 5 against coming from above influences.

In order to prevent the deflection roller 5, for example in the case of a failure of the bearing 7, from disengaging from the remainder of the carrier unit 1 and in particular the yoke bars 3, additional restraint devices 9 are provided on the carrier unit 1.

The retaining fences 9 are each provided in the form of bolt-like pins or screws, which are each secured to the Jochholmen 3 and protrude into the space 11 inside. In the example shown, the retaining fences 9 are formed as continuous pins, which at one end on one of the Jochholme third and at an opposite end to the other of the Jochholme 3 are fixed and in between completely span the gap 11.

The retaining fences 9 are arranged in an upper region of the Jochholme 3 and spaced from each other in the longitudinal direction of the Jochholme 3 by a distance d from each other. Due to the fact that the deflection roller 5 is mounted clearly below the restraint securing means 9 via the bearing 7, the deflection roller 5, which is in FIG. 3 merely illustrated by dashed lines, be taken with an upper portion longitudinally between the two retaining fences 9 and thus rotate freely.

A diameter D of the guide roller 5 is substantially greater than the distance d between the retaining fences 9 in a direction along the Jochholme 3, i. D >> d. For example, D can be> 1.2 * d.

In the event that the bearing 7 fails, for example, and the guide roller 5 no longer holds, the guide roller 5 due to the retaining fences 9 only slightly upwards, that is in the direction of the support direction 31, slip before the retaining fences 9 form a stop and the Deflection roller 5 thus abuts with its outer circumference or its lateral surface to the protruding into the gap 11 retention 9.

The retention fences 9 are designed in particular with regard to a choice of material, a dimensioning and their attachment to the Jochholmen 3 such that they can withstand the forces caused by the abutting pulley 5 forces of several kN. Serving as a retention device 9 and extending from one of the Jochholme 3 through to the opposite Jochholm 3 and anchored there screw or a corresponding other bolt-like pin this can for example consist of a high-strength metal such as steel and a sufficient mechanical strength ensuring diameter of, for example have more than 10mm.

In the FIGS. 5, 6 and 7 is an alternative embodiment of a support unit 1 in perspective view, side view and sectional view taken along the line AA FIG. 6 shown. In the embodiment according to FIG. 4 indicates the storage an exemplified by a cylindrical roller bearing roller bearing 25 which is integrated in the Umlenkrollenanordnung that the axis 23 is fixed. In the second embodiment (see esp. FIG. 7 ), however, rotates the axis 23 with. The roller body of the guide roller 5 is fixedly connected to the axle 23.

The axis 23 is connected via the bearing 30, which is formed by a roller cylinder bearing, rotatably connected to the upper yoke consisting of the two Jochholmen. The carrier unit 1 is configured essentially analogously to the features of the carrier unit described above with reference to FIGS FIGS. 2 to 4 illustrated embodiment. Only one type of storage 7 for the guide roller 5 is configured in a different way, The bearing 7 has two flanges 35. Each flange 35 forms a bearing holder 20 for the bearing 30. The flange 35 is fixed to an underside of the Jochholme 3 and holds about the bearing 30 has an axis 23, with which the guide roller 5 can rotate. About the flanges 35, the storage 7 of the support unit 1, similar to the embodiment described above, held in relation to the jaw members 3 provided retention fences 9 offset downwards. Accordingly, the deflection roller 5 can in turn be held at least with a portion within the gap 11 and in the longitudinal direction between the spaced apart arranged retaining fences 9. The retaining fences 9 can thus prevent the guide roller 5 in the event of failure of the bearing 7 from releasing upward from the Jochholmen 3.

Embodiments of the carrier unit 1 described herein allow increased safety in operation, for example, an elevator system 100. By arranging the retaining fuses 9 directly engaging the Jochholme 3, a material use can be kept low and a space-saving solution for a carrier unit 1, for example, as part of an elevator system 100 serving carrier structure are provided.

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 multitude. It should also be noted that features described with reference to one of the above embodiments also in combination with other features of other embodiments described above can be used. Reference signs in the claims are not to be considered as limiting.

Claims (9)

1. A support unit (1) for an elevator installation (100) for fastening a deflection roller (5) to a support structure (13), comprising:

   two yoke beams (3);

   a bearing (7);

   wherein the yoke beams (3) are arranged parallel to one another and are to be fastened to the support structure (13);

   wherein at least partial regions of the deflection roller (5) are arranged in an intermediate space (11) between the yoke beams (3);

   wherein the deflection roller (5) is mounted by means of the bearing (7) so as to be able to rotate in relation to the yoke beams (3); and

   wherein the yoke beams (3), the deflection roller (5), and the bearing (7) are adapted to transmit a support force, acting on the deflection roller (5) due to the supporting means (108), to the support structure (13) in an upwardly-oriented support direction (31), in order to support or move a weight that is fastened to the support strcture (13) against the force of gravity,

   characterized in that at least two restraint devices (9) are furthermore provided on the support unit (1), each of the restraint devices being fastened to the yoke beams (3) and protruding into the intermediate space (11) between the yoke beams (3) in such a manner as to form a stop for if the bearing (7) fails, in order to prevent the deflection roller (5) from moving in the support direction (31) due to the supporting force.
2. Support unit according to claim 1, wherein the restraint devices (9) and the fastening thereof to the yoke beams (3) are configured so as to prevent the deflection roller (5) from moving in the support direction (31) due to a support force of up to 250 kN.
3. Support unit according to any of the preceding claims, wherein the restraint devices (9) are configured as bolt-shaped pins.
4. Support unit according to any of the preceding claims, wherein the restraint devices (9) are each fastened to both yoke beams (3) and each completely span the intermediate space (11) between the yoke beams (3).
5. Support unit according to any of the preceding claims, wherein the restraint devices (9) are arranged above the bearing (7) in the support direction (31).
6. Support unit according to any of the preceding claims, wherein the deflection roller (5) has a diameter D and wherein the restraint devices (9) protrude, relative to a direction parallel to the diameter D, a distance d into the intermediate space (11) that is smaller than the diameter D.
7. Support unit according to any of the preceding claims, wherein the bearing (7) is arranged below the yoke beams (3).
8. Support unit according to any of the preceding claims, wherein a downwardly-extending bearing restraint (20) is mounted onto each of the yoke beams (3) and wherein a bearer (30) forming a part of the bearing (7) is fastened to the bearing restraints (20).
9. Elevator installation (100) having at least one support unit (1) according to any of the preceding claims.

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