FI120090B - Arrangement for equalizing the lens voltage in a drive pulley elevator - Google Patents

Description

ARRANGEMENT FOR EQUIVALENT TO THE ROPE OF THE TRACTOR LIFT

The invention relates to an arrangement as defined in the preamble of claim 1 for equalizing the rope power of a traction hoist.

The lifting ropes of the elevators have been made thinner, which has also made it possible to reduce the diameters of the drive wheels and the pulleys. This has led to e.g. to the fact that it has been possible to implement higher suspension ratios than before, for example 5: 1 ... 8: 1 and even higher. Correspondingly, the high suspension ratio results in the large lengths of lifting ropes required by many rope loops. In this case, it is essential for the operation and safety of the elevator that the portion of the lifting rope below the elevator car is kept tight enough so that the amount of rope elongation to be compensated, i.e. compensated, is also high.

20 Another reason for long ropes is the high lift height of the elevator.

In this case, the length of the hoisting ropes used in the lifts is also large, so that high lift heights: T: elevators also require high elongation compensation;

···· ·: ··: 25 · * · *: In addition, traction sheave lifts without a counterweight must use · · rope power equalization.

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There are known prior art balancing solutions with rope power. ···. 3 0 alignment is based on various spring and lever systems.

However, when lifting ropes are long, it is not possible to equalize the rope forces with the above-mentioned spring solutions • · 9 * ... · or simple lever systems. For example, lever solutions Σ have been used, where both lifting ropes ··· ·. : 35 ends attached. However, the problem with the leverage solution is that it does not allow for very high elongation compensation because of the limited travel distance of the lever. A better alignment solution when the distance to be compensated is long would be a compensating wheel, whose circumference allows longer 5 compensating distances than the lever movement. Such compensating wheels, however, have not been used for this purpose, because the size of the rope head fastening traditionally used in elevator use takes up a lot of space. In this case, the differential wheel to which the ends of the lifting ropes would be fixed in the conventional manner 10 would have to be very large in size to accommodate the elements required for the rope attachment to the differential. The problem then becomes a complicated, bulky and heavy balancing wheel, which is difficult to locate in the proper location with the other structures of the elevator.

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One prior art traction sheave rope power equalization apparatus is disclosed in US4502570A. In this solution, alignment is accomplished by means of connected rope wheels, but the publication does not disclose 20 preferred solutions for attaching ropes to rope wheels. In turn, GB385228 discloses one way of attaching a rope end to a rope pulley. In the solution shown, the fastening of the rope • · '** is arranged on a wedge basis.

The arrangement according to the present invention has the object *: **: to eliminate the above drawbacks and to enable: *: reliable, simple and compact equipment: **: to balance the rope power of the traction sheave.

'J *; The arrangement according to the invention is characterized in that: *** j is presented in the characterizing part of claim 1.

• · · *. Similarly, other embodiments of the invention are characterized by what is stated in the other claims.

• · • · «• · ·:: 35 • · · • ♦ · • ♦ 3

In accordance with the invention, an arrangement for balancing the rope force of a traction sheave elevator in an elevator equipped with a hoisting rope wherein the hoisting rope moves the rails along the elevator car fixed by means of a wedge to a leveling member consisting of two coaxial and substantially wheel-shaped 10 tensioning wheels which are fixed in relation to each other and a wedge housing opening and tapering towards the periphery of the tensioning wheel is disposed within each of the tensioning wheels. The ends of the hoisting ropes are tensioned by a wedge into the wedge body, and at least one of the ends of the hoisting ropes extends out of the wedge body to circumferentially extend the tensioning wheel to at least one end of the the leveling member is mounted in a • · • · '' shaft or other similar location.

• · · • · · · ·

The solution according to the invention has the advantage of a simple, compact and clear structure. Another advantage is the reliable, simple and easy attachment of the ends of the lifting ropes to the • · ·: equalizing wheel used in the solution of the invention. A further advantage is that, due to its structure, the balancing member according to the invention is small in size, so that it fits in a small space and is thus easy to place in a suitable m · · · · · · ·. location in connection with other elevator structures • · ··· depending on rope transmission. Thus, the location may be, for example, an elevator car, or an upper or lower end of an elevator shaft.

• · · * · 35 Another advantage is that an integrated 4 structure can be used, with the wedge housings integrated into the leveling member. Thus, all the components are essentially one unit, and there is no need for many cumbersome small parts where the ends of the ropes have to be firmly attached to the leveling member. A further advantage is that, when using the compensating member according to the invention, it is possible to compensate, that is, to compensate for very large rope elongations. By changing the size and the relationship of the diameters of the tensioning wheels of the compensating member, the magnitude of the rope elongation to be compensated and the ratio of the rope forces acting over the traction sheave can be influenced, which can be stabilized by such an arrangement.

The invention will now be described in more detail by way of an exemplary embodiment with reference to the accompanying drawings, in which Figure 1 is a simplified and schematic oblique side elevational view of an embodiment of the invention 20, Fig. 2 is an oblique side view of an inventive Fig. 3 is a more detailed and oblique side view of the compensating member of Fig. 2.

Fig. 1 schematically shows one typical elevator suspension according to the invention. Preferably, the elevator is a non-engine room elevator in which the ··· · drive unit 4 with control unit 6 is located in the elevator shaft. The elevator shown in Fig. ··· · ... · 30 is of the upper type and counterweight ... a traction sheave elevator with elevator car 1 moving along rails 2.

····: ***; The alignment of the hoisting rope 3 is carried out by the rope force ···. *. by means of a compensating member 20 having two integrated circular pieces, preferably tensioning wheels 13 and 15, which are mounted in place in the elevator car 1 in step 14. The diameter of the tensioning wheel 15 attached to the hoisting rope portion below the elevator car 1 is larger than the upper carriage part. diameter of the clamping pulley 13 5. The diameter ratio between the diameters of the tensioning wheels 13 and 15 defines the magnitude of the tensioning force acting on the hoisting rope 3 and thus the compensation force of the elongation rope stretching.

10 With odd above and below suspension car lifts, the leveling member 20 is fixedly movable to the elevator car and with even suspension ratios, the equalizing member 20 is fixedly fixed to the elevator shaft or other similar location 15 which is not fixedly mounted to the elevator car. In the solution, two tensioning wheels as shown in Fig. 1 may be used, but the number of wheeled articles used may vary, for example, only one wheel may be used with locations for different rope attachment points of different diameters. It is also possible to use more than two • · • tensioning wheels if, for example, it is desired to vary the diameter between the wheels • · · * · * 'only by changing the diameter of the tensioning wheels.

• · 25: *, · In Fig. 1 the passage of the hoisting rope is as follows: From one, the hoisting ropes 3 are reached, i.e. the hoisting rope is secured to the tensioning wheel 13, which wheel is fixedly fixed · · ·; on the tensioning wheel 15. From the wheel 13, the hoisting rope 3 leaves ·· · 30 upwardly facing the diverting wheel 12, · · · · · · ·, positioned above the elevator car, above the elevator car. whose rope rotates the rope grooves in the impeller 12 • · ·. *. along. These rope grooves may be plated or • · · *. * * | uncoated, for example with friction-enhancing materials such as polyurethane or other suitable material.

From the wheel 12, the rope extends downward to the diverting wheel 11 in the elevator car, after which the rope extends upward into the diverting wheel 10, which is fitted to the top of the shaft. After rotating the pulley 10, the rope returns downwardly to the pulley 9 attached to the elevator car, after which the hoisting rope extends upward to the pulley 10 5 of the hoisting machine 4. The suspension suspension above the elevator car forming the hoisting wheels 13, 12, 11, 10 and 9 , the suspension ratio in Figure 1 being 5: 1.

After the drive wheel 5 has been rotated, the hoisting rope 3 continues to travel downward on the diverting wheel 8, which is preferably positioned in the lower part of the elevator shaft, for example, the car runner 2 or the shaft floor or other suitable location. After rotating the pulley 8 20, the rope 3 continues upward to the elevator pulley 16 fitted to the elevator car, which • · • ”rotates the elevator rope down to the elevator shaft 17 at the bottom of the elevator shaft, returning to the elevator car. 18. After rotating the pulley 18, the hoisting rope 3 continues downwardly to the lower part of the elevator shaft • · · • · * ... 'to the fixed pulley 19, after which the rope extends upwardly into the elevator car 15, which has • · · · ... · 30 stationary fitted to the tensioner wheel 13.

• · · • · · ·

Figures 2 and 3 illustrate the balancing member • · · according to the invention. 20 structure in more detail. An effective tensioner wheel 15 having a larger diameter has an integrated tensioner wheel 13 having a smaller diameter, such that the wheels 13 and 15 are co-axial and stationary with respect to each other. The effective diameter refers to the effective diameter of the rope grooves 27 on the circumference of the tensioning wheels. Each tensioning wheel has a plurality of rope grooves 27 corresponding to the number of parallel ropes 3 of the hoisting ropes, the cross-sectional size and shape of which, as appropriate, correspond to the size and shape of the cross-section of the hoisting ropes.

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For securing the ends of the lifting ropes 3, the smaller tensioning wheel 13 has a wedge body 21 embedded in the tensioning wheel 13 towards the periphery of the tensioning wheel, i.e. an outwardly opening and narrowing wedge, so that the lifting ropes 3 15 tend to pull the wedge outward. As the wedge body 21 narrows in the direction of this pull, the tension causes the wedge 22 to lock into the wedge body and pinch the hoisting ropes 3 engaging the wedge between the wedge and the wedge body. In this way, the locking of the ends of the lifting ropes has been made 20 compact, yet extremely reliable and secure.

The lifting ropes 3 are fastened at one end by rope locks ··· 23 or the like on the surface of the tensioning wheel 15 in front of the wedge 22 25. After being secured, the lifting ropes are guided into the wedge housing 21, where they rotate about a wedge ··· • · * ··· * 22 in the wedge housing 21, where the wedge has rope grooves 28 corresponding to rope grooves 27 of the tensioning wheel 13. The lifting ropes come out of the wedge blade and rotate part of the distance in the rope grooves 27 on the circumference of the tensioning wheel 13 before it rises, for example, to the diverting pulley 12 at the top of the lifting shaft.

···· • · · · · · · ··· y. Similarly, for securing the other ends of the lifting ropes 3, the larger tensioning wheel 15 has a recessed housing 24 disposed in the tensioning wheel 15 ♦ ·· * * 8 towards the periphery of the tensioning wheel, i.e. an outwardly opening and outwardly tapering wedge 25 so that the lifting ropes 3 tend to pull the wedge out of the wedge housing. The wedge housing 24 and the wedge 25 5 are similar in structure and function to the wedge housing 21 and the wedge 22 in the tensioning wheel 13. The attachment of the other ends of the ropes is further secured by rope locks 26 or the like.

After the fastening 26, the lifting ropes are guided into the keyway 24, where they rotate about the key 25 in the keyway 24, which has rope grooves corresponding to the rope groove 27 of the tensioning wheel 13. The lifting ropes come out of the wedge housing and rotate part of the distance in the rope grooves 27 on the circumference of the tensioner wheel 15 before landing, for example, on the diverting wheel 19 at the bottom of the elevator shaft. the distance of the ropes around the tensioning wheel 15 20 is substantially about 270 °. The scale ratio of these initial settings may vary depending on the solution. The angle of rotation changes in use as a result of the elongation of the ropes.

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It will be apparent to one skilled in the art that various embodiments of the invention are not limited to the above examples, but may vary within the scope of the following claims. Thus, for example ... the structure of the compensating member 20 may vary. The tensioning wheels do not necessarily have to be completely round, for example, as long as they have a sufficiently long rope groove or the like, to allow the compensating distance to be sufficiently long. Similarly, it will be apparent to one skilled in the art that the shape, size, and placement of the wedge housings may vary from the above.

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In addition, it will also be apparent to one skilled in the art that, although the suspension described in the example does not have counterweight, the invention may equally be used with counterweight drive wheels, as well as with other suspension ratios and other types of suspension.

The elevator according to the invention is characterized by what is presented in the characterizing part of claim 1.

Other embodiments of the invention are characterized by what is stated in the other claims. Inventive embodiments are also disclosed in the specification of this application. The inventive content of the application may also be defined otherwise than as set forth in the claims below. The inventive content may also consist of several separate inventions, especially if the invention is considered in the light of its expressions or implicit subtasks or in terms of the benefits or classes of benefits achieved. In this case, some of the following claims:. attributes may be redundant for separate inventive ideas.

It will be apparent to one skilled in the art that the invention is not limited to the foregoing embodiments in which the invention is illustrated by way of example, but by various embodiments of the invention. are possible within the scope of the inventive idea defined by the following claims.

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Claims (8)

An arrangement for equalizing the rope power of a traction sheave elevator in an elevator equipped with a hoisting rope (3), wherein the hoisting rope (3) moves the rails (2) along the elevator car (1), suspended by the hoisting rope (3) with an even suspension ratio, and having a rope force equalizing member (20) in the elevator rope suspension, characterized in that both ends of the lifting ropes (3) are fixed and secured by a wedge (22, 25) to a balancing member (20) a rotary idler pulley (13, 15) which is fixedly fixed relative to each other, and a wedge housing (21, 24) opening and tapering towards the periphery of the idler pulley is disposed within each of the idler pulley (13, 15), the wedge housing (21, 24) 22, 25), and that the ends of the lifting ropes (3) are tightened with a key (22, 25) to the keyway (21, 24), and that at least y the ends of the lifting ropes (3) extending out of the wedge housing (21, 24) 20 around the circumference of the tensioning wheel (13,15) to pass along the circumference; to which at least one end of the hoisting ropes (3) is fastened to the outer circumference by a rope lock (26) or the like, and that by the odd hanging ratios of the elevator car (1), the compensating member *** '. (20) is mounted in connection with the elevator car, and • · ... 25 even with the suspension ratios of the elevator car (1), the equalizing member • · * .. I (20) is fitted in the elevator shaft or other such place. Arrangement according to Claim 1, characterized in that the lifting ropes (3) are arranged to travel at least a part of the distance on the circumference of each of the tensioning wheels (13, 15). in: ... · rope grooves (27) • ♦ ♦ ♦ ♦ ♦ Arrangement according to Claim 1 or 2, characterized in that the effective diameter of the tensioning wheel (15) is larger than the effective diameter of the tensioning wheel (13), and that the hoisting rope is arranged to start downwardly from the larger tensioning wheel (15). up. Arrangement according to one of the preceding claims, characterized in that the wedge 10 (22, 25) in the keyway (21, 24) is provided with rope grooves (28) corresponding to the lifting ropes (3). Arrangement according to one of the preceding claims, characterized in that the leveling member (20) is disposed in the elevator car 15 and mounted at its attachment point (14) to rotate about its own central axis. Arrangement according to one of the preceding claims, characterized in that the leveling member (20) is disposed in the elevator shaft 20 and is mounted at its attachment point for rotation about its own central axis. • · • · • · «• · ·:, ί ί Arrangement according to one of the preceding claims, characterized in that the attachment of the ends of the lifting ropes to the twisting wheels (13, 15) is secured by rope locks (23, 26) ·· · f or the like. ··· • · · · ··· Arrangement according to one of the preceding claims, characterized in that the compensating members (20) are, if necessary: **]: 30 more than one. ··· ··· ♦ «• •» »» ♦ ♦ ♦ ♦... *: 35