Title of Invention

A CABLE LIFT COMPRISING A DRIVE PULLEY AND A DRIVE ENGINE

Abstract

A cable lift comprising a drive pulley (5) and a drive engine (5, 7 to 9) for moving a cage (1) and a counterweight (34) in a shaft (2); a pair of first guides (3) for guiding said cage (1), said first guides (3) being arranged in a first vertical plane; a pair of second guides (20) for guiding said counterweight (34), said second guides being arranged in a second vertical plane parallel to the first plane; an engine mount (6) fastened both to the first guides (3) and to the second guides (20), the drive engine (5, 7 to 9) being arranged on said engine mount (6) and the first and second guides being separated from each other, characterized in that the first plane is spaced from the second plane and that the drive engine (5, 7 to 9) is arranged in the shaft (2).

Full Text

DESCRIPTION CABLE ELEVATOR WITH A DRIVE PLATE The present invention relates to a cable lift with drive pulley, consisting of a cage moving along at first separate guides, a counterweight moving along at second separate guides and a drive engine arranged in the shaft. Such a lift disposition needs no separate machine room, which gives lower plant costs and in addition offers the advantage of better utilisation of a building. A lift plant of the aforesaid kind is known from Japanese Utility Model publication No 50297/1992. Two columns in the form of two self-supporting U-section profile members serve as guide for the cage and for the counterweight. The two U-section profile members are closed off at the top by a crossbeam, which carries the drive engine. So that the rucksack cage can move to the height of the drive, the vertical part of the support frame of the cage extends only up to scarcely half the cage height, which produces a short vertical distance between the guide rollers. The latter means a high loading for the guide rollers, even merely by the empty cage. So that the entire equipment does not tilt away from the wall, the crossbeam must additionally be firmly connected with the shaft rear wall, which loads this with correspondingly large horizontal pulling forces. It is evident from the description that this lift is usable or provided for stroke lengths of two to three storeys and low speeds and loads. The construction is not suitable for larger lifts or installations with conventional drive components, as the U-shaped, one-piece double guide rails have to be provided disproportionately wide and heavy and specially processed. The present invention is based on the object of creating a lift without a machine room, the range of use of which lift corresponds with that of conventional lifts with a separate machine room for residential buildings with, for example, up to 15 storeys and a conveying load up to 8 persons. The object is met by the invention characterised in claim 1 and illustrated by way of example in the description and drawing. This invention is distinguished in that an engine mount together with the lift drive is fastened to conventional guide pairs for the cage and the counterweight and that the vertical weight force of drive, cage and counterweight is conducted to the shaft floor exclusively by way of the two guide rail pairs and is supported there. Thus, economic, conventional guide rails find use, wherein the guides of the cage and the counterweight can be of different lengths for optimization of the guide element spacings at the cage. Added to that is the further advantage that in ideal manner no bending moments act on the supporting guide rails by way of the drive, because through this kind of arrangement and fastening only vertical forces are exerted on the guide rails. Thus, a lift without machine room is realised, which can be equipped with only a new drive mount, but otherwise with conventional lift components, even with respect to motor, brake, transmission and guide rail holders. Advantageous developments and improvements are indicated in the sub claims. So that the cage with a normal rucksack support frame can travel to and beyond the height of the drive, the cage guides can extend beyond the engine mount still a bit further upwardly to approximately the shaft ceiling. The introduction of the vertical force effects frictional coupling and mechanically positive coupling to both guide pairs, wherein the counterweight guides end, for example, within the engine mount. A vibration-damped fastening of the engine mount to the guides can be produced with additional elements. The support cables going away vertically downwards from the drive pulley are directly connected, without rollers for deflecting away or deflecting around, with the lower rear edge of the cage and with the upper side of the counterweight. The fastening of the engine mount to the guides is effected by way of appropriately constructed end plates of the engine mount. The fastening of the engine mount to the cage guides can advantageously take place at a butt joint location and thus replace connecting straps. The engine mount is constructed as, for example, a simple welded construction and is composed of only two end plates, two connecting profile members and an engine bearer. The invention is more closely explained in the following on the basis of embodiments and illustrated in the drawings, in which: Fig. 1 shows a side view of the upper shaft region with cage, engine mount and drive, Fig. 2 shows a plan view of the engine mount. Fig. 3 shows a cross-section through the engine mount, Fig. 4 shows a three-dimensional illustration of the engine mount. Fig. 5 shows a plan view of the cage, the drive and partially of the counterweight, Fig. 6 shows a detail of the vibration damping at the cage guide and Fig. 7 shows a side view with the vibration damping at both guides. The side view of Fig. 1 shows the upper part of a shaft 2 with the uppermost storey 10 and the shaft ceiling 23 closing off the shaft 2 at the top. A cage 1 is guided at cage guides 3 by means of upper and lower guide elements 29 and 30 and suspended at support cables 4, which are connected with the cage 1 at the reanvard lower edge by way of a support cable fastening point 12. The support cable portions 4 below the cage 1 lead in the vertical plane to a counterweight 34 (Fig. 5), which is not visible here, to the upper part thereof, where they are connected with this. A cage door is designated by 32 and a storey door by 33. An engine mount 6 is fastened to the cage guides 3 and to counterweight guides 20 (Fig. 2), the latter not being visible in this illustration. A transmission 7 with a drive pulley 5 looped around by support cables 4 is placed on the engine mount 6. A motor 9 and a brake 8 are arranged on the upper side of the transmission 7 and operatively connected with the transmission. The cage guides 3 are fastened over the entire stroke length, and the counterweight guides 20 (Fig. 2), which are not visible here behind the cage guides 3, are fastened as far as under the engine mount 6, to a shaft wall at equal spacings. The outline 11 drawn in dashed lines shows the cage 1 at the position of the uppermost storey 10. In that case the cage 1 is already disposed at about the same height as the transmission 7, The cage 1, however, still has available in addition an over-travel path of about one metre upwardly, which is possible thanks to the continuous cage guides 3 in the engine mount 6. The plan view of the engine mount 6 in Fig. 2 shows the details of this, preferably in a construction produced by welding technology. The engine mount 6 has end plates 14 and 13 respectively at the left and the right, which are welded at the lefthand end face to a longer square tube 16 and at the right-hand end face to a shorter square tube 15. An engine bearer 18 is non-detachably connected in like manner, off-centre between the two end faces of the square tubes 15 and 16, with these end faces. A passage 17 for the support cable 4 is present in the square tube 16 at the left near the engine bearer 18. The roughly indicated transmission 7 is detachably fastened on the engine bearer 18 by means of the bores 19 and screws, which are not shown. Equally, the position of the drive pulley 5 with the support cables 4 is indicated, wherein it is apparent that the support cables 4 lead downwardly to the cage 1 and to the countenance/eight 34 (Fig. 4) without diagonal pull. It is further apparent that the engine mount 6 is fastened not only to the cage guides 3, but also the counterweight guides 20 and that the counterweight guides 20 end below the square tubes 15 and 16. The shapes and proportions of the parts used for the engine mount 6 are apparent in Fig. 3 as a cross-section through the plane of the passage 17. Thus, for example, it can be established that the upper end of a first counterweight guide 20 abuts the underside of the square tube 15/16. Equally, the underside of the square tube 15/16 serves, although not apparent here, as vertical abutment for the second counterweight guide 20. Further, it can be shown that the end plates 13 and 14, here as example the end plate 13, serve at the same time as connecting strap for a butt joint location 31 of the cage guide 3. As already mentioned earlier, the vertical weight forces of cage 1 (Fig. 5), counterweight 34 (Fig. 5) and drive are supported on the shaft floor 22 by way of the two guide rail pairs 3 and 20. The guide rails 3 and 20 can be set down on large-area foot plates 35 for the purpose of reducing the specific loading of the shaft floor 22. The guide holders 21, which are mounted at uniform spacings, serve not only for maintaining the guide geometry, but equally guarantee a sufficient buckling resistance of the guides 3 and 20 in the case of this, otherwise not usual, vertical loading. The three-dimensional illustration in Fig. 4 shows the entire engine mount 6 in its physical form. As an additional feature, up to now not yet shown, only the optional reinforcement 24 under the surface of the engine bearer 18 is to be mentioned here. The invention as a whole is more closely explained in the following by reference to Fig. 5 with the plan view of all components. Due to the rucksack arrangement of the cage 1 the upper guide elements 30 and the concealed guide elements 29 are disposed laterally spaced from the cage 1. The free projection surface, which results therefrom, between the guide elements 29 and 30 is used for the now partly visible counterweight 34 and the drive subassembly with the engine mount 6. The rail holders 21 were omitted from view in this representation in order to show that the drive subassembly with motor 9, brake 8, transmission 7 with drive pulley 5 and engine mount 6 have no kind of mechanical connection with any one shaft part. Also omitted was the speed limiter, which is placed on, for example, the square tube 15/16. The support cable fastening point 12 is displaced somewhat in the direction of the cage door 32 with respect to the centre between the cage guides 9 and with consideration of the asymmetrical weight distribution (door and door drive) of the cage 1. A control box, equally not illustrated, can be placed wherever desired. Various possibilities are offered for that purpose. Thus, this can be arranged by corresponding fastening elements, for example, similarly on the engine mount 6. For the purpose of insulation of body sound, the engine mount 6 can optionally be fastened to the guide rails 3 and 20 in vibration-damped manner. Such a vibration damping between the engine mount 6 and the guides 3 and 20 is provided for higher speeds and demands on comfort. One possible solution for a vibration-damped mounting is illustrated in Figs. 6 and 7 by way of example. For this purpose, new and, in part, changed parts are provided for the engine mount. Instead of the flat end plates 13 and 14 a lefthand and a righthand side bracket 28 are used, the vertical sides of which are non-detachably connected, analogously to the end plates 13 and 14, firmly with the square tubes 15 and 16, A righthand and lefthand fastening bracket 25 are screw-connected to the guide rails 3 and 20 in the same way as the end plates 15 and 16 by direct fastening. For the actual vibration damping, a larger damping element 26 for the cage guide 3 and a smaller damping element 27 for the counterweight guide 20 are placed between the horizontal support surfaces of the two side brackets 28 and fastening brackets 25. Cent ring pins 36 prevent, without transmission of body sound, a lateral displacement of the engine mount by possible vibrations during operation. Forces laterally engaging the engine mount 6 are not present, because, due to the own weight of the drive and the load suspended by way of the support cables 4 without deflecting rollers, exclusively vertical forces act on the engine mount 6. The area, thickness and resilience of the damping elements 26 and 27 is matched to the specific loads prevailing at these locations. The construction of the engine mount 6 is not limited, with respect to choice of profile member and joining technique, to the kind of the shown example. A construction with other profile shapes would also be possible for that purpose and the connections of the parts amongst one another could also be made by means of screw connections. With respect to the motor 9 and transmission 7, any variant can be used for the drive of this lift without engine room, subject to be able to be arranged in the available space of this drive disposition. Due to the available surface area for the drive on the engine mount 6, a motor 9 is advantageously arranged in upright position. Equally, also a motor with integrated or attached coaxial transmission and brake and with a drive pulley going off at one side or two drive pulleys going off at both sides could be provided on the kind and arrangement of the engine mount 6 according to the invention, with appropriate adaptation of constructional details of the same. Claims 1. Cable lift with drive pulley (5), consisting of a cage (1) moving along at first guides (3), a counterweight (34) moving along at second guides (20) and a drive engine (5, 7 to 9) arranged in the shaft (2), characterised in that the drive engine (5, 7 to 9) is arranged on an engine mount (6) fastened both to the guide rails (3) of the cage (1) and to the separate guide rails (20) of the counterweight (34). 2. Cable lift according to claim 1, characterised in that the guide rails (3) of the cage (1) extend on upwardly beyond the engine mount (6) after the connection therewith. 3. Cable lift according to claim 1, characterised in that the guides (20) for the counterweight (34) are connected with the engine mount (6) so as to end within it. 4. Cable lift according to claim 1, characterised in that support cables (4) are led from the drive pulley (5) directly to a support cable fastening point (12) at the underside of the cage (1) and directly to the upper side of the counterweight (34). 5. Cable lift according to claim 1, characterised in that the engine mount (6) is connected in vibration-damped manner (25 to 28) with the guides (3) of the cage (1) and with the guides (20) of the counterweight (34). 6. Cable lift according to claim 1, characterised in that the engine mount (6) comprises end plates (13, 14) for the fastening to the guide rails (3, 20) and an engine bearer (18), wherein the end plates (13, 14) and the engine bearer (18) are non-detachably fixedly interconnected (15, 16). 7. Cable lift according to claim 5 or 6, characterised in that the end plates (13, 14) or fastening bracket (25) of the engine mount (6) form a butt joint connection (31) for the guide rails (3) of the cage (1). 8. Cable lift with drive pulley substantially as hereinbefore described.

Documents:

in-pct-2000-072-che-abstract.pdf

in-pct-2000-072-che-claims filed.pdf

in-pct-2000-072-che-claims grant.pdf

in-pct-2000-072-che-correspondnece-others.pdf

in-pct-2000-072-che-correspondnece-po.pdf

in-pct-2000-072-che-description(complete)filed.pdf

in-pct-2000-072-che-description(complete)grant.pdf

in-pct-2000-072-che-drawings.pdf

in-pct-2000-072-che-form 1.pdf

in-pct-2000-072-che-form 19.pdf

in-pct-2000-072-che-form 26.pdf

in-pct-2000-072-che-form 3.pdf

in-pct-2000-072-che-form 5.pdf

in-pct-2000-072-che-pct.pdf