EP1879825A1

EP1879825A1 - Device for stretching compensation in lift cables

Info

Publication number: EP1879825A1
Application number: EP05826469A
Authority: EP
Inventors: Giorgio Jezek
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-05-13
Filing date: 2005-12-29
Publication date: 2008-01-23
Anticipated expiration: 2025-12-29
Also published as: CA2598814A1; WO2006120504A1; KR100964170B1; KR20070106770A; RU2007131395A; ATE429400T1; AU2005331693A1; DE502005007164D1; EP1879825B1; ES2323144T3; US20110094831A1; JP2008532891A

Abstract

The invention relates to a device for stretching compensation in lift cables, arranged within a lift unit, with a lift shaft, a cabin (1) (FIGS. 1 and 2), a counter-weight (7) (FIGS. 1 and 2), at least one lift cable (3) (image 1), said cabin and said counter-weight on the pulley (4) (image 1 and 2) and a cable (9) (FIGS. 1 and 2) connected to the underside of the cabin and the counter-weight (FIG. 2) running around the freely-rotating pulley (10) (FIGS. 1 and 2) in the lift shaft. According to the invention, the device comprises a drive, mechanically connected to the end of at least one cable rod (27) (FIG. 4) on the underside of the cabin (11) (FIG. 2) and passing through pressure springs applied to the cabin cable section and a sensor (34) on the spring (12) (FIGS. 1 and 2), which serves to trigger the drive (16) (FIGS. 1, 2, 3 and 4). Two solutions to achieve automatic load compensation on a lift into which a load is charged are given.

Description

DEVICE FOR THE EXTENSION COMPENSATION OF LIFT ROPES

The present invention relates to a

Device for the extension compensation of elevator ropes according to the preamble of claim 1.

The aim of the invention is to realize an elevator system that is always balanced when the load changes in the cabin. This problem is solved by implementing two main embodiments, which are explained below:

1. Realization: Retaining the rope length both above and below the cabin [The ropes lengthen with the use of the elevator (time, number of trips) and

- other]

2. Rope system over and under the cabin with counterweight; accordingly tensioned, loads and springs being dimensioned according to the equations and drawings presented here.

Three solutions from the second implementation are presented.

1 rope was taken into account in the patent application. However, the elevator has several ropes with a total load - (Fi-F ₂ -F ₃ -F ₄ ), which is evenly distributed over the different ropes (F on one rope - applies to 5 ropes

Fi refers to the force on the spring 12 - F ₂ refers to the force on the spring 13 - F ₃ refers to the force on the spring 14 - F ₄ refers to the force on the plate 15 (Figure 4) .

The features and the details of the device according to the invention will become apparent from the following description of a preferred embodiment, which is shown in the accompanying drawing. Show it

FIG. 1, schematically, an elevator installation in a first solution of the second implementation,

FIG. 2, schematically, an elevator installation in a second solution of the second implementation,

FIG. 3, a device for compensating rope extensions,

FIG. 4, a cross section of planes III-III from FIG. 3

Figure 5 shows an elevator system in a third solution of the second implementation and

FIG. 6 shows detail C from FIG. 5.

In Figure 1, the entirety of an elevator system is shown, which comprises a car 1 in a known manner, suspended in position 2 on at least one

Rope 3, which is wrapped around a traction sheave 4 in order Position 6 to be connected to a counterweight 7, the other end of which in position 8 is connected to at least one cable 9 which is deflected by a disc 10 in order to be connected in position 11 to the floor of the cabin 1.

According to the invention, a spring 12 is inserted in position 2, a spring 13 in position 6 and a spring 14 in position 8, while in position 11 a device for adjusting the rope length is provided, which is explained in more detail here.

Is according to the invention Fi as a force on the ropes 3 on the cabin, F ₂ as a force on the ropes on the counterweight, F ₃ as a force on the rope section between the lower pulley and the counterweight and F ₄ as a force on the rope section between the pulley and Floor of the cabin, the following relationships apply according to the invention:

The first solution (FIG. 1) of the second implementation does not provide the load balancing of the load that is loading the cabin, but is exemplary to have the first solution.

The total weight of the empty cabin is taken into account equal to Q (nominal capacity of the cabin) and corresponding to the weight of the counterweight

You can also write

Solution 2 - Figure 2 from the second implementation The springs M _i2 and M13 (which will be the same and with constant stiffness are arranged as shown in the drawing) (Figure 2) and with a load equal to zero until a load 3Q (see deflection) is reached. The Mi ₄ spring will also be of constant stiffness, which will be equal to half of the M ₁₂ and M ₁₃ springs.

K _M i4 = Η K _M i2 = ^ i. K _M 13 •

For the positioning and the load on the springs M ₁₂ and Mi ₃ , the ropes are tensioned by acting on the nuts of their tension rods until the deflection of the springs themselves corresponds to the size corresponding to the load (3Q with δ = 0) (3Q is the Load on springs Mi ₂ and Mi ₃ )

For the adjustment of the M ₁₄ spring, the procedure is such that with (δ = 0) (empty cabin without load) the deflection of the M ₁₄ spring is 0 (zero) (but must rest on the nuts and locknuts).

Solution 3 - Figure 5 and Figure 6 of the second implementation The spring Mi ₂ must always have the same stiffness as the spring Mi ₃ and the spring M14 will have a stiffness equal to half of the springs Mi ₂ and M _i3 . Therefore

K _M i4 = HK _M i2 = ^ K _M i3. For the positioning everything was given in Figure 5 and Figure 6 and for their adjustment we proceed as follows:

The load Q is loaded into the cabin and, acting on the nuts of the tension rods of the ropes, the load 4Q on the spring M _i2 (see deflection) and the load 3Q on the spring M ₁₃ (see the deflection). This can be achieved by acting on the spring M ₁₄ via nut and lock nut 37 and the stop 36 (FIG. 6), which are adjustable.

With a cabin load equal to the nominal load capacity of the system, the deflection of the springs is achieved

Q

Mi ₂ and M13 will differ by the value τr (the deflection of M12 will be greater than that of Mi ₃ ).

P = empty weight of the cabin and weight of the counterweight (are the same) -

Newton δ = variable calculation load (from 0 to 1.5 Q) - Newton Δ = force difference and deflection difference - Newton and mm F = forces - Newton f = deflection - mm K = stiffness of the spring - Newton / mm

Q = nominal load capacity of the elevator (usually = p) - Newton

1. Realization The device under the cabin comprises a base plate 15 which is firmly fixed to the floor of the cabin 1. On the side opposite the floor of the cabin 1, the plate carries a gear 16 which is fastened to the plate 15. The output shaft of the gear 16 is parallel to the cables 9, carries a pinion

17, on which a link chain 18 is wound, wound on sprockets 19, 20, 21, 22 and 23, which are wedged by the corresponding tension rods of the rope 9 (FIG. 1) or 25 (FIG. 4), for example welded in position 38.

Each rope 9 extends in tie rods 27, which go through openings in the support plate 15, each pass through a ball and a thrust bearing and screw into a nut and a lock nut 28 and 29, the free end protruding from the nut and the lock nut and is accordingly equipped with a split pin 30.

The transmission is expediently adjustable, for example by means of an elongated hole, fastened to the plate 15, so that the tension of the link chain 18 can be adjusted. A sensor for measuring the change in length of the spring 12 is expediently provided on the spring 12 and sends a signal to the transmission 16 (FIGS. 3 and 4) for its start-up so that the pinion 17 rotates in accordance with a torsion of the cables 9 by the change in length to compensate for the spring.

Each tie rod 27 can be fixed firmly on the underside of the plate 15 by a thrust bearing 31 in order to maintain the alignment of the chain.

All of the above statements are based on some considerations given here:

1. The calculation of the number of ropes (n) is carried out in accordance with the applicable legal regulations, taking into account that the load Fi applied in position 2 is evenly distributed over several ropes. (The load on one rope therefore corresponds to the load on each of the other ropes). The load Fχ _{/ n} is therefore present on each rope).

2. The value Δ f _x (deflection of springs 1) must not exceed 15 mm. With a load in the cabin equal to Q (Q = nominal load capacity of the cabin).

3. The value Δ Fi or δ max. (maximum calculation load in the cabin) must never be less than 1.5 Q. - In these versions, δ max. = 1.5 Q. 4. The ropes that connect the lower part of the cabin (with the pulley in the shaft) to the lower part of the counterweight and its springs correspond in number, size and technical characteristics to the suspension ropes (upper part of the cabin - upper part of the counterweight) This is not necessary; - they must weigh like the top ropes).

5. Appropriate measures must be taken to prevent the pull rods of the ropes from rotating on their axis (with the exception of the pull rods that are moved by the gearbox - see first implementation).

6. The gearbox must be absolutely irreversible.

7. The sensor that controls the movement of the gearbox must also function when the cabin is empty (δ = 0) and when approaching the highest stop (if the compensator is located below the cabin).

8. These statements were written taking into account a rigidity of the ropes corresponding to ∞ infinite.

9. With regard to the second and the third solution of the second realization, an opinion of the

"Consiglio Nazionale delle Ricerche" can be obtained on the question of whether "F ₄ in idle mode" is larger must be> 2 Q or 3 Q or other ("F ₄ in empty mode" means that there is no weight in the cabin = δ = 0).

10. The balance of the elevator can be achieved by using 2-3-4-5-6-7-8-9-10 and also more springs, arranged accordingly on each rope.

11. For lifts that make use of this principle (second and third solution of the second implementation), steel cables with a textile core must be used, all of which must have strands with the same torsion "for the same elevator" (all with torsion on the right or all with torsion on the left) ).

12. If ropes with a shortened extension are used, the elevator can only be compensated by balancing the lengths of the ropes with a device arranged under the cabin - for considerable rope lengths two devices should be used (one for the ropes above the cabin and the Counterweight and one for the ropes connecting the cabin and the counterweight on the underside), (see third solution of the second realization).

13. Experience has shown that Seale ropes with 6 strands, 114 wires and a textile core are best suited. These have the least extension. 14. K _3n is the stiffness of the springs 14 or also

KM14 •

15. K _2n is the stiffness of the springs 13 or K _M 13 •

16. Ki _n is the stiffness of the springs 12 or also

KM12 •

17. "n ^Xλ will be the number of pull ropes.

18. The second and third solutions of the second realization were found taking into account that the cabin is loaded with the upper pulley clamped by the engine brake.

19. In FIG. 6, “36” denotes the adjustable stop of the spring Mi ₄ .

20. The stiffness of the springs attached to the ropes is always calculated using the reference basis of the "n" springs Mi ₂ ; it will always be: K _M i ₂ = - = O— N n-15 mm

The size 15 of the above formula can also be changed, but must never exceed the actual value "25" [(which are the values permitted by European legal provisions); (level that forms the cabin threshold with the floor threshold if the cabin itself is with the nominal load "Q ^{λλ is} loaded)] 21. The reference numbers 2-5-6 are identical to the reference numbers from FIG. 1.

22. The second and third solutions of the second realization are presented taking into account that the elevator system has only one rope (not realistic case).

23. The two solutions that can balance the system, i.e. the second and the third solution of the second realization are to be adjusted with the cabin at the same height of the counterweight and under the

Requirement that the weight of the cabin

(together with all their accessories) plus that

The weight of the ropes is equal to the load capacity "Q".

Claims

PATENT CLAIMS

1. Claim of the right for the sole Mr. Giorgio Jezek to use the principle that by increasing the number of turns of the strands of a steel rope (textile core or core) of a certain length, the rope is shortened.

2. Device for the extension compensation of elevator ropes, which are arranged in an elevator installation, which have an elevator shaft, a car (1) (FIGS. 1 and 2), a counterweight (7) (FIGS. 1 and 2), at least one suspension rope (3) (Figure 1) of the named cabin and the mentioned counterweight on the disc (4) (Figures 1 and 2) and a rope (9) connected to the bottom of the cabin and the counterweight (Figure 2) (Figures 1 and 2) , which is deflected in the shaft of the elevator of the freely rotating disc (10) (Figures 1 and 2), characterized in that it consists of a drive that mechanically with the end of at least one

Cable pull rod (27) (Figure 4) on the lower part of the cabin

(11) (Figure 2), and consists of compression springs, which are used on the cable section of the cabin, from a sensor (34) on the spring (12) (Figures 1 and 2), which serves to drive (16 ) (Figure 1, 2, 3 and 4).

3. Device according to the preceding claims, characterized in that it is intended to shorten five ropes, but the same device can be implemented for one or more ropes (since the number of ropes is calculated in accordance with the legal regulations applicable in each country ).

4. The device according to claim 2, characterized in that it comprises a base plate (15) (Figure 4) which is fixedly attached to the frame of the cabin (1) (Figure 1), the plate being a gear (16) (Figure 4 ), which is attached to the plate (15) (Figure 4), the output shaft of the gear (16) (Figure 4) parallel to the tension rods (27) (Figures 3 and 4) of the cables, a pinion ( 17) (FIG. 4), around which a link chain (18) (FIGS. 3 and 4) runs, which also winds around sprockets that are wedged or welded to the corresponding tie rods of the ropes, said sprockets [19, 20 , 21, 22 and 23] (Figures 3 and 4) are on the same plane of the pinion (17) (Figure 4).

5. The device according to claim 4, characterized in that at least one spring moves the sensor 34 (Figure 1) which controls the transmission (16) (Figure 4).

6. Device according to the preceding claims, characterized in that the gear (16) (Figure 4) is absolutely irreversible.

7. Device according to the preceding claims, characterized in that the tension rods (35) (Figure 1)

Ropes that are not moved by the gearbox must not be able to turn around their axis (if they rotate by themselves, the ropes will lengthen).

8. Device according to the preceding claims, characterized in that a system is provided to increase the number of slopes of the strands of five ropes [by increasing the slopes (also in fractions) the ropes are shortened].

9. Device according to the preceding claims, characterized in that on the plate (15) (Figure 4) the entire complex is fixed, which compensates for the cable extension, with the exception of the sensor, which is mounted on a spring and detects the cable extension.

10. Device according to the preceding claims, characterized in that on the tension rods (27) thrust bearing

(26 and 31) and as well as nuts and lock nuts (28, 29, 32 and 33) are attached, which are screwed on in such a way that the tension rod can rotate freely about its own axis (before the link chain 18 is installed) (Figures 3 and 4) and before the ropes are attached to the corresponding tension rods.

11. The device according to the preceding claims, characterized in that cable pull rods (27) (Figures 3 and 4) 'on which the various gears (19, 20, 21, 22 and 23) (Figure 4) are keyed or welded.

12. The device according to the preceding claims, characterized in that between the rope (9) and tie rod (27) a connection (24) is provided, which is valid for all tie rods and ropes (Figure 1, 2 and 4).

13. Device according to the preceding claims, characterized in that one or more sensors (34) (Figure 1 and 2) are provided.

14. Device according to the preceding claims, characterized in that the sensor (34) (Figure 1), which puts the transmission (16) (Figure 4) into operation, only when empty and at the highest point of the elevator journey stopped cabin is in operation, ie when the counterweight is the closest to its overflow supports.

15. Device according to the preceding claims, characterized in that in the case of two extension compensation devices for the cables (one on the cabin (below) and one on the counterweight (above)), their mode of operation is determined by the same sensor, but must alternate in their mode of operation, and the cabin must always be at the highest point it can reach). (See the third solution of the second implementation, where in Figure 5, the 39 and 40 are the places where it is possible to install the two cable extension compensators.)

16. Claim of the second implementation in the second and third solution already described, characterized in that the automatic load balancing of an elevator is achieved (for each load that in the

Elevator car is loaded) (Figure 2, 5 and 6).