MXPA00001239A - Access to drive unit of an elevator without machine-room - Google Patents

Abstract

The lift cage (10) has a closable roof opening (24) through which the drive unit (19) is accessible. The roof opening does not extend right up to the region of the drive unit but leaves a roof section (10c) protruding from the drive unit. The roof opening is closed off by a flap (27) which can be locked to prevent unauthorized access, and which can be removed from the cage roof and used a service platform (26). At least one stop (17) is provided to ensure a minimum distance between the lift cage and drive unit.

Description

UNLIMITED LIFT OF MACHINES Description The invention relates to an elevator with a car that moves along at least one guide track in an elevator shaft, with at least one support cable that supports the car and with a drive unit that has at least one drive motor and a cable pulley driven by the motor and acting together with at least one carrying wire, the drive unit being arranged in the upper part of the elevator shaft and protruding from the cab, at least partially. For the technical article "elevators without room for the mechanism of accionamiento" (Ausfzüge ohne Triebswerkraum), notebook Lift-Report 3/1998, knows a lift without quarter of machines whose unit of accionamiento is arranged in supports of the part superior of the hollow of the elevator, supports that are fixed in a wall of the shaft. Maintenance work on the drive unit is carried out from the roof of the elevator car. In order to observe the drive unit also in motion, a mounting platform is proposed which is installed, if necessary, from a maintenance platform. This elevator requires a height of the upper end of the relatively large elevator above the cab. In addition, the installation of the maintenance platform or mounting platform in the elevator shaft is relatively complicated. Starting from this basis, the objective of the invention is to propose an elevator that guarantees, with a good use of the elevator shaft, that is, with a gap of lower height and smaller cross section, the security of access to the drive unit, especially also in case the cab remains locked in a superior position. In order to achieve this objective, it is proposed, according to the invention, that the cab of an elevator of the above mentioned type have a roof opening which can be closed and through which the drive unit is accessed. In the elevator according to the invention, maintenance work is carried out from inside the cabin by means of a maintenance platform arranged therein. The assembler can access the drive unit through the opening provided in the roof of the cab and that can be closed. The access to the drive unit through the cab is also guaranteed in case the cab is locked in a higher position. The roof opening can have different dimensions. In particular, the roof opening can also cover the entire roof of the cab, thus guaranteeing good access on all sides of the drive unit. An essential advantage of the elevator according to the invention is that, in addition to a good use of the cross section of the elevator shaft, the height of the shaft can be kept very small, since maintenance work can be carried out from the inside of the shaft. the cabin. As in the elevator according to the invention, the cab does not pass through the drive unit, drive motors of different construction types and dimensions can be used, which offers great flexibility. In particular, drive motors with or without gears can optionally be used. The concept of the elevator according to the invention can be applied with different arrangements of the supporting cable. In particular, the load-bearing cable can pass under the booth via drive pulleys or a drum winch can be used instead of a drive pulley. The drive concept according to the invention can also be applied in elevators of the so-called "backpack" type in which the cabin is only guided on one side. Due to the fact that the upper part of the elevator shaft, also called the head of the shaft, is arranged in the drive unit, different fixing variants of the drive unit can be provided. A) Yes, for example, the drive unit can be fixed in transverse beams housed between the walls of the hole and be supported standing or hanging. In the subclaims there are presented the types of execution ososo sale of the invention. In an advantageous embodiment, the roof opening does not include the projecting area of the drive unit. The roof opening is dimensioned and arranged in such a way that the fitter in the cabin has sufficient safety space for the head and torso, which prevents parts of his body from being trapped between the roof of the cabin and the drive unit in any position of the cabin. Advantageously, the roof opening is closed with an interlocked hatch. In an advantageous embodiment, the flap is provided with an interlocking device secured against unauthorized access. The interlocking device may be assigned an opening device arranged in a distribution box to which only the assembler has access.

In an advantageous embodiment, it is proposed that the hatch be removable from the roof of the cab and used as a maintenance platform or as part of it. The trapdoor can serve, for example, as a support surface for the maintenance platform. In addition, the trapdoor can have folding supports that transform it into a disassembled state in a maintenance platform. The maintenance platform, too, can be staggered with several support surfaces at different heights. In another advantageous embodiment, the hatch is arranged in a fastening device fixed on the roof of the cabin, a device with which the hatch is transformed into a maintenance platform arranged parallel to the roof. The fastening device can have, for example, fasteners designed in the form of scissors. In an advantageous embodiment, at least one stop is provided which ensures a minimum distance between the car and the drive unit. This stop can be designed as a shock absorber that acts together with the counterweight. In an advantageous embodiment of the invention, the drive unit is housed in at least one support that rests on a wall of the shaft or on guide rails of the car or guide rails of the counterweight.

In a further advantageous embodiment, the cable or the supporting cables are guided by inversion pulleys located under the cab. The drive unit may be equipped with a gear, especially a planetary gear. As already mentioned at the beginning, an essential advantage of the concept of the elevator according to the invention is that there are no limitations in terms of the dimensions of the drive unit. In the following, the invention is explained in more detail with the aid of exemplary embodiments represented schematically in the drawings. These show: - Figure 1, schematic longitudinal section of an elevator shaft with a first type of execution of an elevator according to the invention. - Figure 2, section through the plane II-II of figure 1 with the cab in the closed position. - Figure 3, another type of execution, in section similar to that of Figure 2. - Figure 4, longitudinal section of the cabin, in another embodiment according to the invention. Figure 1 shows a schematic longitudinal section through an elevator shaft 11, which is limited by hollow walls 12a, 12b, arranged essentially parallel to one another, as well as a bottom of gap 18 and a hollow ceiling 13. In the recess 11 of the elevator, a cabin 10 for transporting people has been arranged. The hole 11 of the elevator, which spans several plies, has hollow doors on each floor, not shown in the drawing, towards which the car 10 is directed. For the movement of the car, the elevator is equipped with a drive unit 19, arranged in the upper part of the elevator shaft 11, in the so-called head of the shaft. The drive unit 19 has a drive motor 21 whose shaft drives a rope pulley. For the support of the drive unit 19 two parallel beams 22 are provided, the ends of which are fixed on opposite walls of the shaft. The car 10 is supported by a set of carrying cables 14, of which only a carrying cable 14 has been shown schematically in the drawing. The carrying rope 14 has a first end fixed to the wall of the recess 12b in an anchor 29 arranged in the upper area of the hole. Starting from the anchor 29, the supporting cable 14 passes over the reversing pulleys 30a, 30b provided in the floor 10a of the car 10, up to the cable pulley 20 driven by the drive motor 21. After passing over the cable pulley 20, the carrier cable 14 is directed towards a counterweight counterweight pulley 16 fixed on the counterweight 15. After passing over the inverter pulley 16, the supporting cable 14 is directed again towards an anchor arranged in the upper area of the hollow and not shown in the drawing. As can be seen in figure 2, the car 10 is guided in two rails 28 that run along the elevator shaft 11. The counterweight 15, also 15, is guided on rails not shown in more detail. In this view it can be seen particularly well that the shaft 23 of the drive motor 21 is arranged essentially perpendicular to the wall of the gap 12a. The cable pulley 20, on the other hand, is positioned parallel to the wall of the recess 12a. Because the drive unit 19 is disposed in the upper part of the recess 11, which can not be crossed by the car 10, the dimensions of the car 10 can be chosen so as to take advantage essentially of the complete cross-section of the recess 11 of the elevator. In addition, a good utilization of the height of the gap is obtained without additional safety distances, because the car 10 has a roof 10b in which an opening 24 that can be closed with a hatch 27 is provided. To prevent an opening the trap 27 is equipped with an interlocking device 32 secured against unauthorized use. This prevents passengers from opening trapdoor 27 and leaving cabin 10 during the trip. The locking device 32 can be connected, for example, to a connection device arranged in an elevator distribution box and only accessible to the assembler 25. Figure 1 shows an operating state in which the cab 10 is in position of maintenance. Here, the booth 10 is moved manually by the assembler 25 to the sector of the drive unit 19. The counterweight 15 is assigned a stop 17 designed as a shock absorber. Thus a contact between the booth 10 and the drive unit 19 is safely avoided. As can be seen both in FIGS. 1 and 2, the roof opening 24 does not extend laterally to the area of the drive unit 19. According to this, the opening 24 does not include the part 10c of the car 10 on which the drive unit is located. For the execution of the assembly work, a maintenance platform 26 is installed on the floor 10a of the booth 10, where, for example, the flap 27 can serve as a support surface. The maintenance platform 26 can also have a stepped design with support surfaces at different heights. The editor can stand on the platform 26 and perform maintenance work on the drive unit 19 through the opening 24. Due to its arrangement, all the parts of the drive unit 19 are easily accessible to the assembler 25. In the exemplary embodiment shown in FIG. 4, the flap 27 is suspended from a fastening device 33 fixed to the roof 10b of the car 10. The fastening device 33 has fastening elements 34 in the form of scissors at the free end thereof. the flap 27 is fixed. The figure shows the maintenance position, in which the flap 27 has been moved by the assembler 25 to the interior of the car 10. In this position, the assembler 25 uses the trampill 27 as a maintenance platform , carrying out maintenance work on the drive unit 19 through the roof opening 24. In the closed position, shown in broken lines, the hatch 27 closes the opening 24 of the roof 10b of the cabin. Figure 3 shows another embodiment in section similar to that of figure 2. For the support of the drive unit 19, a gusset 36 is provided, which at its free end rests on parallel guide rails of the counterweight 15. The drive unit 19 protrudes from the car 10 only partially. The access to the drive unit 19 through the roof opening 24 is good. Since the maintenance work is carried out from inside the cab 10 and not from the roof of the cabin, it is possible to suppress a special safety distance in the upper part of the shaft in all the execution examples, so that it can be used optimally the height of the hole. Furthermore, with this elevator concept, any drive unit 19 with different dimensions can be used. Among these units are drive pulleys with or without gear, drum lathes, hydraulic drives or linear motors. The concept of the elevator according to the invention can, moreover, be applied in other carrying cable guides. All variants have one point in common; Due to the arrangement of the drive unit and the carrying out of maintenance work through an opening in the roof of the car, which can be closed, a very good use of the elevator shaft 11 is achieved in both the transverse direction and in the longitudinal direction

Claims (10)

1. CLAIMS 1. Elevator with a cab that moves along at least one guide rail in an elevator shaft, with at least one supporting cable supporting the cab and with a drive unit having at least one , a drive motor and a pulley of cable driven by it and acting together with at least one carrying cable, the drive unit being arranged in the upper sector of the shaft and protruding, at least in part, above the cab, characterized in that the cab has a roof opening which can be closed and through which the drive unit is accessed. Elevator according to claim 1, characterized in that the roof opening does not include the part of the roof of the car on which the drive unit extends. Elevator according to claim 1 or 2, characterized in that the roof opening can be closed with an intered hatch. Elevator according to claim 3, characterized in that the flap is equipped with a de-flushing device secured against unauthorized access. 5. Elevator according to claim 3 or 4, characterized in that the hatch can be removed from the roof of the cabin and used as a maintenance platform or as a part thereof. Elevator according to claim 3 or 4, characterized in that the hatch is suspended in a fastening device fixed to the roof of the cab, for example with clamping elements in the form of scissors, whereby the hatch can be moved to a position of maintenance parallel to the roof. 7. Elevator according to one of the preceding claims, characterized in that at least one stop is provided which ensures a minimum distance between the car and the drive unit. Elevator according to claim 7, characterized in that the stop is constructed as a shock absorber acting together with the counterweight. Elevator according to one of the preceding claims, characterized in that the drive unit is housed in at least one beam which in turn rests on a wall of the shaft or on guide rails of the car or guide rails of the counterweight. Elevator according to one of the preceding claims, characterized in that at least one carrying cable passes over the investment pulleys ted below the cab.