FI118217B - A method for modernizing a lift - Google Patents

Description

. ,. I. ; 118217 i 'ΐ

METHOD FOR MODERNIZING THE LIFT

FIELD OF THE INVENTION '

The invention relates to a method as defined in the preamble of claim 1.

BACKGROUND OF THE INVENTION

Known in the past is the elevator, which includes the elevator shaft in the building. The elevator shaft has essentially 10 vertical rails. The elevator car has a so-called.

sling, or panty-like ke-

a skeleton body with guide members operable with the rails of the rails and on which the rails and other parts of the ridge are assembled. The elevator car also has a basket door. T

15 The elevator car is guided to guide the carriage rails to move substantially up and down in the elevator shaft. Further, the elevator includes a counterweight, which is traditionally dimensioned such that the weight of the counterweight is the weight of the elevator car plus half of the max load of the elevator car. The counterweight is dimensioned in this way because the function of the counterweight is to ensure sufficient friction * * between the ropes of the rope drive wheel 3a.

• · · • t · * * *

EP 1555232 discloses a method for modernizing an elevator equipped with a machine * * 25, for example, a * * .toothed-belted elevator with a new drive • * · * ". * Machine located at the top of the elevator shaft. the old drive unit is removed from the engine room, the ropes are removed from the elevator car and counterweight and,; * .i .: 30 is removed. In the known method, a new drive unit is provided in the upper part of the elevator shaft, including: ·. led ·· and secured at one end to an old elevator car * · and at the other end to an old counterweight.

: X: 35 • * · * · • · ··· ...

'! · 118217 -.:.2

The movement of the counterweight is substantially controlled by the vertical counterweight conductors. The elevator car and counterweight are connected by a series of ropes. The engine room is usually a separate room above the elevator shaft or 5 sides. The engine room has a drive mechanism comprising a rope traction wheel over which the ropes are guided and a motor which rotates the rope traction wheel to move the elevator car and counterweight by means of the ropes. This type of elevator is a very common type of elevator. In the 1960s and 1980s a few hundred thousand were built and now they are in need of modernization.

Old lifts are not very energy efficient.

Studies show that an elevator used in a residential building, for example, designed for a maximum load of 8 to 15 people, runs 80 - 90% of its time with a load of 0, 1 or 2 persons. This sign

states that 80 - 90% of his time is the elevator drive V

uses energy mainly to shift the counterweight, which is far from optimal in terms of energy consumption 20 and operating costs. Assuming an average load of one person, an 8-person lift will run an average of 3 people in an imbalance.

* · II · * ·· · * * * r- • *: A further problem with these types of elevators is the high number of *! '*: 25 wear and maintenance parts.

** ··· • · j. *. In addition, there is a problem with rope lifts that • · · ·. ···. For this purpose, the basket must be protected by two-way • anti-locking devices that prevent both the basket from crashing upwards. 30 that downward.

* Running up means uncontrolled *: *. · Failure of a machine, transmission or brakes • * situation where the elevator car and its load are * * ^, · , 35 The heavier counterweight pulls down and pulls the basket • · * * · '· * upwards. If allowed to continue, elevator car ♦ ··

* · I

* ... * can crash into the roof of an elevator shaft with serious consequences.

3, 118217

Since 1998, the European elevator code, EN81-1, has called for a solution to prevent upward movement of new elevators. This may not be the case with older elevators. Because it is possible for the car to be rushed upwards, a stopping distance is needed to stop it due to the slow mass and a sufficiently high headroom must be provided for the elevator shaft within which the car can stop. In addition, the design of the headspace takes into account that when the counterweight is full-10 with a compressed bumper, the elevator car should still be a sufficient "jumping distance".

Nor is the heavyweight lift '? can drive at very high speed.

15

PURPOSE OF THE INVENTION

The object of the invention is to eliminate the above disadvantages. .

In particular, it is an object of the present invention to provide a method by which an elevator can be modernized to be simpler, lighter, * * · safer and more energy efficient, and lower in operating costs.

*: '* I' 25 \ * "" It is a further object of the invention to provide a method which allows the upper space of the elevator to be utilized; · · · ·; ***; * · * for other use, such as residential or storage, or the like.

It is a further object of the present invention to provide a method for modernizing an elevator so that the elevator is: can drive at higher speeds. In addition, installation is quick and easy. In addition, the method is suitable for use in different types of houses, ranging from • ♦ '··· * dorms to private homes. Of course, the method 4 118217 also achieves a small cost, which makes the modernization of the elevator cheaper.

SUMMARY OF THE INVENTION

The process according to the invention is characterized in what is set forth in claim 1.

The method according to the invention is characterized by what is stated in the characterizing part of claim 1. Other embodiments of the invention are characterized by what is set forth in the other claims. Inventive embodiments are also disclosed in the specification and drawings of this application. The inventive content of the Ha-15 formulation 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 the disclosed or implied subtasks or the benefits or classes of benefits achieved. Then some,. the attributes contained in the following claims may be redundant for separate inventive ideas. Various Embodiments of the Invention The features of the various forms of the invention may be applied within the framework of the inventive concept to the other embodiments: *.

• · * * • · * • * * · «· ·

According to the invention, the method comprises modernizing the elevator

, · / 30 sex fixed to the elevator car * * * *. Attachment can be made to basket guides, basket * · *; * brackets or the like by means of chains or the like * · i / ··. Fix the counterweight steadily to the pressure: *: **. Attachment can be made to counterweight conductors 35, counterweight brackets or the like by means of chains «* · J 1 '• ·« or the like. The mass of the counterweight is lightened • · * ··· * so that the counterweight mass is equal to or less than 118217 5. dead mass to achieve zero balancing.

The old drive unit is removed from the engine room. The ropes are removed from the elevator car and counterweight and removed. A second drive mechanism is provided at the top of the elevator shaft, which comprises a toothed belt drive wheel and a motor for rotating the toothed belt drive wheel. The toothed belt is guided over the toothed belt drive gear so that the toothed belt engagement is in tensile contact with the toothed belt drive gear. The toothed belt is fastened at one end to the elevator car and at the other end to a lightweight counterweight.

An advantage of the invention is that the use of a toothed belt as the drive element of the elevator 15 enables an elevator in which the counterweight is dimensioned to balance only the mass of the unloaded elevator car, i.e. the so-called. dead mass or slightly lower. This kind of optimal balancing is called zero-balancing.

20 Zero balancing offers many benefits. As mentioned above, when an elevator is used in a residential building, 80-90% of its time is driven by a load of 0, 1 or 2 persons; a zero-balanced elevator can run 80-90% of the time with low energy consumption.

• · f 25 * · · · ·. In a zero-balanced elevator, the body rushes upwards; • 1 · · 1 what cannot happen. Therefore, the basket needs to be protected by • 1 ·: only with one-way clamps that * · 1 · ... · prevent the basket from falling down. f 3 0: In a zero-balanced elevator where no upward rush • · k occurs and because the stopping distance is very low • · ·, 1. Also, no high headroom is required, but a very small headroom can be made with suitable safety devices.

• 1 «· · · • 1 • · • ·« 6 118217

In a toothed belt driven elevator, the toothed belt gear is forcibly pulled in contact with the drive gear teeth to form a non-slip traction mainly based on shape locking rather than friction than in rope lifts where adequate friction between the rope drive and the ropes is important. The forced drive principle achieved by a toothed belt is also referred to as "positive drive system".

With such a forced-lift type balanced to zero load, the weight of the elevator car can be minimized because there is no need to provide sufficient friction and the amount of counterweight can be minimized.

The moving mass and the average imbalance can be optimized as cheaply as possible and low energy consumption is achieved.

In addition, a zero-balanced elevator can be driven at a higher speed than prior art 20-weighted elevator.

A further advantage is that, due to reduced weight, fewer parts are needed and manufacturing, installation and maintenance costs are low.

• · · 25 * ·, Of course, two or more tooth belts can be used instead of one toothed belt. In addition, it is preferable that the toothed belts are placed side by side.

30: In one embodiment of the method, a toothed belt * * * ·: ***; barn and zero-balanced upgraded * ··. the weight of the elevator counterweight so as to achieve a new * * * * · * | si balancing the average load of the elevator car.

***** * 35 In the event of a fault, the elevator car rushes upwards with its V-. Average load refers to the lift. * · *. rin, which corresponds to a load of 1-3 persons.

• · · 7 118217 This achieves maximum energy savings, but requires some device to prevent the elevator car from crashing upwards.

In one embodiment of the method, substantially one or more vertical hangers, such as ropes, rods, profiles, or the like, are provided in the elevator shaft adjacent the elevator car, which are fixed at an upper end to a fixed structure at the top 10 of the elevator shaft. The elevator car is provided with grippers, each of which is arranged to grip the hanger to prevent the car from rising up and falling in the event of a failure.

15

Of course, one can utilize the existing car rails, whereby the other vertical hangers described above are not needed, but the grippers or.

the like are arranged to grip the basket guide 20 to prevent the elevator car from crashing or falling in the event of a failure.

In one embodiment of the method, the elevator car is modernized by removing and / or replacing at least one of the following: basket, rack, interior, sling.

• Φ

In one embodiment of the method, if the old elevator • ♦ ** • · ·: basket does not have a basket door, it is provided with a basket door.

• · · * ... · The ratchet door may be of any suitable type, such as a double or single leaf car::: sliding door, swing door, bellows door or the like.

• * · a · * * • * · \\. *. In one embodiment of the method, the old • · · * · · *; elevator car and replaced with a lighter elevator car.

35

In an embodiment of the method, if necessary, an elevator car is weighed to determine the dead mass.

• · · 8 118217

In one embodiment of the method, an old elevator control system and a short-circuiting motor are used to rotate the toothed belt drive wheel.

5

In one embodiment of the method, his-] f

sine control system and uses a permanent magnet synchron motor, a short circuit motor, or the like to rotate the toothed belt drive wheel. iO

In one embodiment of the method, when the counterweight includes a plurality of counterweight blocks, the counterweight is lightened by removing the counterweight blocks. Correspondingly, the counterweight mass can be increased by adding counterweight blocks, if the situation so requires, for example, if the old elevator car is replaced with a new one that is heavier than the original, whereby the addition of counterweight blocks results in zero balance.

20 In one embodiment of the method, an upper beam is attached to the upper ends of the basket guides and another drive mechanism is attached to the upper beam.

t • · · • · · ·

In one embodiment of the method, a conditioner is provided to inspect the tooth belt for teeth.

* * '-H

. fitness.

In one embodiment of the method, the condition check device detects a predetermined distance limit of two consecutive 30 teeth: # j *: greater distance.

• · · • · * · • * *. *. In one embodiment of the method, the condition checker • * * c m · * * * checks the condition of the teeth by mechanical, electrical, optical and / or magnetic detection, or: * · * · a combination thereof.

• · • · · · · · · · · · 9 118217

In one embodiment of the method, a first radiation source is provided on the condition control device to direct the narrow first radiation beam from the side of the toothed belt to the longitudinal side surface of the toothed belt. Providing a first detector disposed on the other side of the toothed belt with respect to the location of the first radiation source, in alignment with the first radiation source, for detecting the first radiation beam. Providing a second radiation source 10 to direct a narrow second radiation beam parallel to the first radiation beam from the side of the toothed belt to a longitudinal side surface of the toothed belt at a distance from the first radial beam which is spaced by two consecutive spaced teeth. A second detector is provided which is disposed on one side of the toothed belt relative to the location of the second radiation source, in parallel with the second radiation source, to detect the second radiation beam. Further, an identification device is provided which, based on the detection of the first and second detectors, detects a possible mismatch of the first radiation beam and the second radiation beam for detecting tooth failure, such as wear or missing.

* · · · *

In one embodiment of the method, means for detecting tooth wear • · · ··· are provided in a conditioner. '30

In one embodiment of the method, tooth wear *** is indicated by the tooth extraction edge and · * #. Increasing the distance between the trailing edge beyond the predefined • · · '· "limit.

35

In one embodiment of the method, a third is arranged ·· *. a radiation source for directing a narrow third radiation beam parallel to the second radiation beam from the side of the toothed belt to the longitudinal side surface of the toothed belt at a distance from the second radiating beam to the distance of the toothed tooth distance. A third detector is provided which is disposed on the other side of the toothed belt relative to the location of the third radiation source and aligned with the third radiation source to detect a third radiation beam. The detection device is adapted to detect, based on the detection of the second and third detectors, the possible simultaneity of the second radiation beam and the third radiation beam to detect a tooth wear greater than said threshold.

In one embodiment of the method, the laser source is selected as the radiation source.

In one embodiment of the method, a toothed belt having a perpendicular tooth direction is selected as a toothed belt:; in relation to the length of the toothed belt.

• · • »· * *« • ·

In one embodiment of the method, a toothed belt is selected from a rubber or polyurethane toothed belt having a plurality of longitudinal suspension means for receiving a tension load on the toothed belt.

In one embodiment of the method, the hanging members are ropes or ropes, such as steel or fiber ropes, or combinations thereof.

• · · »··.

•. In one embodiment of the method, the hammer ···· »• · is attached. 35 mounts for attaching to the elevator car and / or counterweight by means of a device comprising a first jaw with • ♦ ·:: tooth formations corresponding to a toothed belt «* 11 118217 against which the toothed belt can be adjusted to hold the toothed belt and jaw support the toothed belt hammastuspuolen opposite to the rear side, and between which the first jaw and the second 5 jaw upper end of the toothed belt can be pressed.

In one embodiment of the method, the suspension members are extended from the end of the toothed belt out of the rubber or 10 polyurethane material of the toothed belt and attached to the elevator car and / or counterweight.

In one embodiment of the method, a mechanical motion limiter is provided to stop the movement of the elevator car at the top of the elevator shaft 15.

In one embodiment of the method, a mechanical motion limiter is provided in the vicinity of the mounting device.

In one embodiment of the method, the movement of the elevator car at the top of the elevator shaft is limited by a separating member which separates the drive gear teeth and the gear belt teeth to prevent transmission of traction.

In one embodiment of the method, the separation member is a blanket extending over the tooth of the toothed belt, such as • ·. . sleeve, plate or similar.

In one embodiment of the method, the movement of the elevator car at the top of the elevator shaft 30 is limited in the vicinity of the fastening device ·. ·. * By the toothless portion of the toothed belt which forms said mechanical movement. · ♦ ·. *. limiter.

In another embodiment of the method, a second condition check device is provided to check the suspension members when: **; to and express the damage.

··· 12 118217

In one embodiment of the method, the suspension members are made of electrically conductive material. Another condition control device 5 indicates the condition of the suspension member based on the change in electrical resistance.

In one embodiment of the method, the suspension members are connected in series. Measure the total resistance dance of the series-connected suspension members with the second condition checker 10.

In one embodiment of the method, the suspension members are connected in parallel. Using a second condition checker, measure the total resistance of the parallel suspended suspension members.

LIST OF FIGURES

In the following, the invention will be described in detail by way of example with reference to the accompanying drawing, in which: Fig. 1 is an axonometric view of a top view of a modern elevator. , ····· • · • *::: Figure 2 shows the elevator of Figure 1 after modernization, Figure 3 schematically shows the elevator of Figure 2. . ·. Fig. 4 schematically illustrates a toothed belt conditioner, 35 Fig. 5 schematically illustrates an elevator of the invention according to the invention, * - * * * * * * * * *. Fig. 6 shows a toothed belt fastening device for securing the toothed belt of Fig. 5 to an elevator car, Fig. 7 shows a sectional view VII-VII of Fig. 6, 5 Fig. 8 shows another embodiment of a toothed belt securing device to Fig. 5, Fig. 9 Fig. 9 is a sectional view IX-IX in Fig. 8, and Fig. 10 shows another third embodiment of a toothed belt fastening device for attaching the toothed belt of Fig. 5 to an elevator car.

Fig. 11 is a diagrammatic view of a toothed belt of an elevator modernized by the method of the invention and an electrical condition control device for its serially connected suspension means having an odd number; 20 'Fig. 12 is a schematic representation of another toothed belt and , electronic conditioner ·; ··· 25 refills, and ♦ ** ·· j. ·. Fig. 13 is a schematic view of a third toothed belt of an elevator modernized by the method of the invention, · · · 'II, * and an electrical condition control device 30 for its parallel suspended suspension members.

DETAILED DESCRIPTION OF THE INVENTION The modernization of the rope lift shown in Fig. 1 is: ···; Figure 35 illustrates, for clarity, the elevator shaft • · · * # *, with part of the walls of the elevator shaft missing. The opposite walls of the elevator shaft 1 have 14118217 substantially vertical car rails 2 and 3. The elevator car 4 has a sling 5 and a car door 6. The car 4 is guided by the car rails 2 and 3 to move substantially in the elevator shaft 1.

5

The counterweight 7 in the rope lift is conventionally dimensioned to be 50% balanced with the load, i.e. the mass of the counterweight 7 is the weight of the elevator car 4 plus half the maximum load of the elevator car 4. If the elevator is an 8 person 10 (630 kg) elevator, then the weight of the counterweight 7 is of the order of about 900 kg. The counterweight 7 is guided to move under the control of substantially vertical counterweight guides 8. The counterweight 7 is conventionally assembled by stacking counterweight blocks 18 on top of one another.

15 '' The elevator car 4 and counterweight 7 are connected to each other by ropes 9.

The drive mechanism 10 is located in the engine room 11, which is already located on the elevator shaft 1. The drive mechanism 10 has a rope drive wheel 12 over which the ropes 9 are guided. The rope traction wheel 12 is rotated by the motor 13 to move the elevator cable *, ·, · 4 and counterweight 7 by the ropes 9.

• · * • · · · · · · · · · · · · · · · · · · · · · · · · · · · | the elevator car 4 is secured by clamps or a brake: from its stationary position to the carriageway rails 2, 3. The counterweight 7 is also fixed by means of chains or the like • * to its stationary position into the counterweight rails 8.

30 The mass of the counterweight 7 is lightened by removing from it * * '' j j * so many counterweight blocks 18 that, when lightened, the counterweight 7 weighs no more than the weight of the elevator wheel 4 to provide a so-called. zero balancing.

• *

Weighing is not required if the lightening is carried out by occasionally opening the clamps or brake and feeling the balance of the handwheel.

* ·

* · V

• * · 15 118217

Removing old propulsion machinery from 10 engine rooms 11.

The ropes 9 are removed from the elevator car 4 and counterweight 7 and the ropes 9 are removed.

Alternatively, the empty or unloaded elevator car 4 may be weighed and the weight recorded to determine the dead mass, and thereby weighing based on the determined dead mass will reduce the counterweight blocks from the counterweight to achieve a zero balance.

10

The elevator car 4 can also be modernized by replacing or removing the interior, rack door, sling and the like. Preferably, this is naturally done before zero-balancing. Also, the entire elevator car can be replaced with a new and preferably lighter elevator car.

For example, a hinged door can be replaced by a bellows door.

The main thing is that the dead mass of the elevator car 4 is known.

In the example case of an 8-person his-20 si, the lightweight counterweight 7 weighs about 400 to 450 kg, whereas before lightening it weighed about 900 kg.

On the side of the elevator shaft 1 or in the engine room 11, a new drive mechanism 14 is provided, which comprises a toothed belt pulley 15 and an engine 16 toothed drive pulley. rotate. For example, the drive mechanism 14 may be attached to a top beam 19 attached to the upper ends of the rails 2, 3 or other fixed structures. The old motor 13 can be used as the motor 16 or it can be replaced with a modern permanent: magnetic synchronous motor. Old or new motor- * * *; ***; with r, the short-circuiting motor can be used above • · ·. *. Lee's old elevator control system. Alternatively, * * · * · "the elevator control system will also be modernized by running * * 35 permanent magnet synchronous motors.

• · · * ·.

* ·· * * ··· • * • · • * * 16 - -:.

118217

The toothed belt 17 is guided over the toothed pulley 15 and the pulleys so that the toothing of the toothed belt is in pulling contact with the toothing of the toothed pulley 15. The toothed belt 17 is fastened at one end 5 to the elevator car 4 and at its other end a lightweight counterweight 7. The result is a 1: 1 mediated elevator.

The modernized elevator can also be balanced for the average load if the elevator is provided with up-10 anti-slip devices 34, 35 (Figure 3).

The mass of the elevator counterweight, modernized with toothed belt drive and zero-balanced, is increased to provide a new balance to the average load of the elevator car, and to prevent the elevator car from crashing upwards in the event of a failure. Uplifting is prevented by providing substantially vertical ropes 34 attached to the elevator shaft adjacent the elevator car 4, which are fastened at its upper end to a fixed structure, such as a top beam 19 at the upper end of the elevator shaft 1, and ropes 34 20 secured at its lower end. The elevator car is provided with rope fasteners 35 which engage the rope 34 to prevent the elevator car from being rushed up and falling in the event of a failure condition .I ·. · • · t *. 25 ♦ ·. Referring to Fig. 5, the conventional belt for industrial use can be used as a toothed belt 17 • * ψ * ψ! available in the form of a toothed belt having a width of, for example, 55 mm or 85 mm (manufactured by e.g. Gates 30 Corporation, Denver, USA and ContiTech AG, Hannover, Germany). In Fig. 3, the toothed belt 17 is well represented: ***: schematically with rectangular teeth, but preferably * · 4. *. 5-6, a toothed belt 17 having a round profile t · * * * teeth of Figures 5-6, of rubber material * * · · · 35 made of chloroprene rubber and containing a plurality of traction elements::: steel ropes 20 which receive the toothed belt; bet. For example, a commercially available preferred 55mm wide toothed belt has 14 steel wires inside and 85mm wide toothed belts have 25 wire wires respectively. The tensile strength of such two 55mm wide or one 85mm wide toothed belts is equivalent to that of a conventional four-rope elevator. The preferred toothed belt of Fig. 5 has a layer of polyamide fabric on its surface.

6 and 7 illustrate a toothed belt attachment device 21 for attaching a toothed belt 17 to a lifting basket 4 or a sling 5. Similarly, the toothed belt may be attached to a counterweight 7. The engaging means 21 includes a first jaw 22 having 15 tooth-like patterns of toothed belt 17. 23 against which the toothed belt teeth can be set to hold the toothed belt in a locked position. The second jaw 24 supports a toothed belt hammastuspuolen opposite to the rear side. The toothed belt end 20 is pressed between the first jaw 22 and the second jaw 24. The strap attachment is secured by attaching steel wire rope pulling members 20 extending from the end of the toothed strap 17 to a separate elevator car 4 or sling 5. '«· · 25 5 *«

Figures 3 and 6 to 10 further show mechanical movement. . a stop 42, which restricts the movement of the elevator car in the upper part of the elevator shaft to ensure a • safe enough safety space ♦ · * ·. · * for the installer.

30

The mechanical motion limiter 42 stops the upward movement of the elevator car 5i to prevent a rush. Mechanical. · *; the motion limiter 42 is arranged on a toothed belt 17 * · ·! the fastening device 21 with which the belt head is fixed 35 is connected to the elevator car 4, sling 5 or counterweight 7 so that the mechanical motion limiter 42 comprises a separating member 43 which separates the toothing of the drive wheel 15 and the toothing of the toothed belt 17 to prevent the bet from being transmitted.

In Figures 3 and 8 to 10, the separating member 43 is a toothed belt 17 5. a cover over the tooth, such as a sleeve, plate or the like.

In Figures 6 and 7, the prevention of traction transmission is implemented by a toothless portion 44 in the proximity of the toothed belt 17 in the proximity of the fastening device 21 which forms said mechanical motion limiter 42.

Figures 8 and 9 show another embodiment of a tooth belt 15 fastening device 21 for attaching a toothed belt 17 to an elevator car 4 or a sling 5 and / or a counterweight 7. The fastening device 21 here comprises two successive separate first jaws 22 having toothed belt 17 The masts are formed by toothed formations against which the toothed belt gear can be set to hold the toothed belt in a locked position. on the opposite side of the belt is elongated in the second jaw 24, which is supported at • · Come toothed belt hammastuspuolen opposite with respect to a a a a a]. 25 seits from behind. The toothed belt head is clamped by · ·, bolted joints between the first jaws 22 and the second IMI * jaw 24. The second jaw 24 includes a staple 37 for attaching it to an axle, which in turn is mounted on an elevator car 4 or a sling 5 and / or counterweight 7 respectively.

···, a a · a a * · *** In Fig. 10 there is another embodiment of the attachment device 21, in which the end of the toothed belt 17 is bent into a loop. * · * J inside wedge housing 38 and wedge 36 inserted inside loop * 35. After the loop, the toothed belt 17 is pressed together with itself on opposite sides of the press, ***. wool with first jaws 22 and second jaw aa.

m 19 118217 24. The wedge housing 38 is secured to the elevator car 4 or the sling 5 and / or counterweight 7 respectively.

Figure 4 further illustrates that the elevator 5 may be provided with a condition checker 25 for checking the condition of the teeth of the toothed belt 17. The conditioner 25 is attached to a fixed structure relative to the building and arranged to inspect a moving ham-10 belt 17 passing by the conditioner 25.

The condition checking device 25 of Figure 4 comprises means for sensing a distance II-15 greater than a predetermined distance L1 of two consecutive adjacent teeth. Conditioning means may be based on mechanical, electrical, optical and / or magnetic detection.

In the embodiment of Fig. 4, the means include a first radiation source 25, for example a laser, which guides a narrow first radiation beam 27 from the side of the toothed belt 17 to the longitudinal side surface of the toothed belt; V; tooth. The first detector 28 is fitted to the other side of the toothed belt relative to the location of the first radiation source 26, with the first radiation source 26, for detecting the first radiation beam 27. The second radiation source * mm · 29, for example a laser, directs a narrow second radiation ** * ... * into the longitudinal side surface of the pulley 30 parallel to the first radiation beam 27 27 from the side of the toothed belt. to the tooth at a distance Li from the first radiation ♦ · ·. *. the distance 27. corresponds to a predetermined distance between two successive teeth of the toothed belt 17. A second detector 31 is disposed on one side of the toothed belt relative to the second radiation source 29 ·. ***; location in line with another radiation source • · ·.

: 20 118217 for detecting a second radiation beam 30. On the basis of the detection of the first detector 28 and the second detector 31, the detecting device 32 detects a possible misalignment of the first radiation beam and the second radiation beam, which indicates a tooth malfunction such as wear or absence. When a malfunction is detected, the sensing device 32 may activate the braking device to brake movement of the elevator car based on detection of the safety device, and / or locking the elevator car to lock the elevator car rails and / or the alarm device 33 to alert.

Further, Figure 4 shows that the condition checker 25 includes means for detecting tooth wear I-15, which means an increase in the distance between the tooth pulling edge and the trailing edge is greater than a predetermined limit value L2. These abrasion detecting means include a third radiation source 39, for example a laser, which guides the narrow 20 third radiation beam 40 parallel to the second radiation beam 30 from the side of the toothed belt to the longitudinal side surface of the toothed belt. to the mast at a distance L2 from one of the other radius beams 30. The distance L2 corresponds to a predetermined distance between the toothed drive edge and the trailing edge of the toothed belt.

'*** · The third detector 41 is fitted to the second tooth belt • * i #; · Half relative to the location of the third radiation source 39, · * '* aligned with the third radiation source Φ · * 30 to detect the third radiation beam 40. In recognition, device 32 recognizes a second and a third detector * - * ··. * ··. on the basis of taste, the possible coexistence of the second beam and the third beam, • * · * · * | indicates that the tooth has exceeded the limit L2 ···· * * 35. When a malfunction is detected, the detecting device 32 may: V: activate the braking device to brake the elevator car movement turval *** based on the detection of the safety device, and / or 21 118217 to permanently lock the elevator car to the car rails and / or to provide an alarm 33.

Figures 11 to 13 schematically show another condition control device 45 which ensures the safety of the elevator. The second condition checker 45 electrically checks the condition of the hanging members 20 inside the toothed belt 17 and detects if any of the padding members 20 of the ri-10 are damaged. The suspension members 20 are an electrically conductive material such as steel or carbon fiber. Conditioner 45 detects the condition of the suspension members 20 based on a change in their electrical resistance.

15

In Figure 11, the second condition checker 45 measures the total resistance of the series-connected suspension members 20. If one of the hanging members 20 is damaged, the resistance will increase to infinity, which is easy to detect. In the Ku-20 van 11 embodiment, the number of suspension members 20 is odd, so that the measuring terminals are located at both ends of the toothed belt. Therefore, the copper conductor 46 with the length of the toothed belt has to be used as a guide. 15 • · · 4 ·; ·. copper wire is not needed as the number of hanging members 20 * · · 25 is even and the measuring terminals are located. toothed belt 17 at one end.

In the example of Figure 13, the conditioner 45 measures the total resistance 30 of the parallel-mounted suspension members 20. Here, higher requirements are set for the accuracy of the resistance measurement than the application of • · ·. ***; applications. In this embodiment, the copper conductor 46 also has to be used because the measuring terminals are located at different ends of the toothed belt.

35 The invention is not limited to the above-mentioned embodiments. many examples of rugs • 118217 22.

are possible within the scope of the inventive idea defined by the claims.

It will be apparent to one skilled in the art that the invention is not limited to the embodiments described above, which illustrate the invention by way of example, but that many modifications and various embodiments of the invention are possible within the scope of the inventive concept defined in the claims below.

10 • · · * ♦ 1 2 3 • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ··· '' • • • · '' '' '•' 2 • · · 3 • ♦ 1 ··. ·· '' · * ·· • '£ • · • · · • M • «····. «•! * · • · · · 1 · · · ··· * #

Claims (34)

A method for modernizing an elevator, the elevator to be modernized comprising a 5-elevator shaft (1) in the building, substantially vertical car rails (2, 3) in the elevator shaft, an elevator car (4) comprising a sling (5) and a car door (6) is guided by 10 platform guides to move substantially vertically in the shaft, - counterweight (7),. - a substantially vertical counterweight guide (8) for controlling the movement of the counterweight, a plurality of ropes (9) connecting the elevator car and the counterweight, and - a drive mechanism (10) located in or adjacent to the elevator shaft in the engine room (11) 12) over which the ropes are routed, and 20 to rotate a motor (13) traction sheave to move the elevator car and counterweight via the ropes,. in which method * · * - immobilize the elevator car (4) * · · • * # * # in place with the car rails (2, 3), with the carriage bracket 25 or the like, * * - immobilize the counterweight (7) • ·:. guides (8), * · * counterweight fasteners or the like, - removing the old drive mechanism (10) from the engine room Method according to claim 1, characterized in that two or more toothed belts are used. Method according to Claim 1 or 2, characterized in that 20. the mass of the counterweight of the modernized elevator, which is toothed belt driven and zero balanced, is added to obtain a new balancing of the average load of the elevator car, and • *; 'j *. - Prevent the car from crashing upwards in 25 fault conditions. • · * • ·. . A method according to claims 1-3, characterized in that substantially one or more vertical hangers (34), such as ropes, • *: * ·· rods, profiles, are arranged adjacent the elevator car to the elevator shaft. or those who • · · s, „! fastened at its upper end to a fixed structure. ·. at the upper end of the elevator shaft and at its lower end into a fixed • · * S ·· structure at the lower end of the elevator shaft, and • · "* 35 elevator car grips (35), each of which is · ·«: arranged to fasten the elevator car : 25 118217 to prevent bumping and falling in the event of a fault. Method according to one of Claims 1 to 4, characterized in that the elevator car is modernized by removing and / or replacing at least one of the following: basket, basket door, interior parts, sling. Method according to Claim 5, characterized in that if the old elevator car (4) does not have a car door, it is provided with a car door. Method according to one of Claims 1 to 6, characterized in that the old elevator car (4) is removed and replaced with a new elevator car. Method according to one of Claims 1 to 7, characterized in that, if necessary, the elevator car (4) is weighed to determine the dead mass. • · * · * The * · 1 ·. · · Method according to any one of claims 1 to 8, characterized in that an old * "*: 25 elevator control system and a short-circuit motor are used to rotate the toothed belt drive wheel (15). The method according to any one of claims 1 to 9, characterized in that the control system of the 30 lifts is modernized and the * .. ) 1 permanent magnet synchronous motor, short-circuit motor • · '* ·· 1 or equivalent toothed belt drive pulley (15); ***: for rotation. • · * · 1 • * • «* · ·. * 4 35 Method according to any one of claims 1 to 10, characterized in that when the counterweight *: (4) comprises a plurality of counterweight blocks (18), the counterweight 26118217 is lightened by removing the counterweight blocks (18) and correspondingly the counterweight blocks are added. (18) by adding. Method according to one of Claims 1 to 11, characterized in that an upper beam (19) is attached to the upper ends of the car guides (2, 3) and a second drive mechanism (14) is attached to the upper beam d9). 10 Method according to one of Claims 1 to 12, characterized in that a condition control device (25) is provided to check the condition of the teeth of the toothed belt. 15 Method according to Claim 13, characterized in that the condition checking device (25) detects a distance greater than a predetermined distance (Li) of two adjacent teeth 20. A method according to claim 14, characterized in that the condition checker (25) • * »V · checks the condition of the teeth by mechanical, electrical, optical and / or magnetic detection or *: **: a combination of both. • * • · · * · ·. ·· *. A method according to claim 14 or 15, characterized in that the condition checking device 30 (25) t · * · · - is provided with a first radiation source (26) for directing a narrow first radiation beam (27)! * · *: From the side of the toothed belt (17) to the longitudinal side of the toothed belt, * to the toothed fit, *. 35 - providing a first detector (28), * * * ** '· disposed on the other side of the toothed belt • »· * · * i relative to position 27118217 of the first radiation source (26) to detect the first radiation beam (27); a radiation source (29) for guiding a narrow second radiation beam (30) 5 parallel to the first radiation beam (27) from the side of the toothed belt to the longitudinal side surface of the toothed belt at a distance (Li) from the first radiation beam (27) providing a second detector (31) disposed on one side of the toothed belt relative to the location of the second radiation source (29) with the second radiation source 15 to detect the second radiation beam (30), and means (32) for detecting, on the basis of the detection of the first and second detectors, any mismatch between the first radiation beam and the second radiation beam 20 for detecting a tooth defect such as wear or absence. • • • • • • • • • 1 · ϊ.ϊ ί The *: · 1: 25 method according to any one of claims 13 to 16, characterized in that means are provided for detecting the wear of the tooth Ϊ on the conditioner (22). • · · «li 1 * · · '• 1 • · A method according to claim 17, characterized in that for detecting tooth wear * «: 2, an increase in a predetermined limit value (L2) of the distance between the tooth pulling edge and • 1 · * * 1 leaving edge is detected. enlarge. • · · 1 · ··· The method of claim 18, »· • · · *. 1J characterized in that 2 • · • · · * · # • · ',:. Providing a third radiation source (39) for directing a narrow third radiation beam (40) parallel to the second radiation beam (30) to the longitudinal side surface of the toothed belt 5 at a distance (L2) from the second radiation beam (L2); L2) corresponds to a distance defined by a predetermined wear limit between the tooth pulling edge of the tooth belt and a trailing edge, 10. providing a third detector (41) disposed on one side of the tooth belt relative to the third radiation source 40; and 15 - adjusting the detecting device (32) to detect, based on the detection of the second and third detectors, the possible simultaneity of the second radiation beam and the third radiation beam for detecting tooth wear above said limit value (L2). ; 20 Method according to one of Claims 16 to 19, characterized in that the laser source (26, 29, 40 * .1.2) is selected as the radiation source. The *; ··· method according to any one of claims 1 to 21, characterized in that • · 2; toothed belt (17) A toothed belt with · · 1 »to 3. direction perpendicular to the longitudinal direction of the toothed belt. • · • · · .. 30 The method of claim 21,. Characterized in that the toothed belt (17) is selected as a toothed belt (17); a rubber or polyurethane toothed belt having a plurality of longitudinal hanging members; (20) the tensile load on the timing belt · ♦ ·, 1. 35 for receiving. • · ♦ «« «• · · 2 ··· 3 • · · -S ** 29 118217 A method according to claim 21, characterized in that the hanging members (20) are ropes or ropes, such as steel or fiber ropes or combinations thereof. 5; 23 118217 Method according to Claim 22 or 23, characterized in that the toothed belt (17) is fastened to the elevator car (4) and / or counterweight (7) by means of a fastening device (21) having a first jaw (22) having toothed arrangements ( 23) against which the toothed belt gear can be set to hold the toothed belt in a locked position, and a second jaw (24) for supporting the toothed belt on opposite sides of the gear teeth 15, and between the first jaw (22) and the second jaw (2). Method 2 according to one of Claims 22 to 24, characterized in that the suspension elements (20) are extended from the end of the toothed belt (17) out of the toothed belt rubber or polyurethane material and are attached to the elevator car (20). 4) • · · V: and / or counterweight (7). *: **: 25 ····· The method i according to any one of claims 1 to 25, characterized in that * · · ·. · ♦ ·. a mechanical motion stop (42) to stop the movement of the elevator car (4) at the top of the elevator shaft (1). .. 30 • · A method according to claim 26, characterized by providing a mechanical; * · *: motion limiter (42) attached to the attachment device (21) * ·. ***. in the vicinity. • * ♦ • 35 A method according to claim 26 or 27, characterized in that the movement 30 of the elevator car (4) at the top of the elevator shaft (1) is limited by a separating member (43) which separates the traction wheel (6) and the toothed belt (6). 8) tooth transmission to prevent the transmission of traction. '' 5 A method according to claim 27, characterized in that the separating member (43) is a cover, such as a sleeve, plate or the like, extending over the toothed belt (17). 10 Method according to claim 26 or 27, characterized in that the movement of the elevator car (4) at the top of the elevator shaft (1) is limited by the fastening device (21). in the vicinity of the toothed belt 15 by a toothless portion (44) forming said mechanical motion limiter (42). 30 UD,. ···. - remove the ropes (9) from the elevator car (4) and * · · * the counterweight (7), * * · * * · '' - remove the ropes (9), * · · - arrange a second * at the top of the elevator shaft (1): (14) comprising • · ·: a gear belt drive wheel (15) and a motor (16) * * * for rotating the gear belt drive wheel 24118217 is guided over the gear belt drive gear (15) so that the toothing of the gear belt is in tensioning engagement with the gear belt. attaching the toothed belt (17) at one end to the elevator car (4) and at the other end to the counterweight (7), characterized in that the method further comprises the step of lightening the weight of the counterweight (7) so that the weight of 10 counterweight or so-called. dead mass to achieve zero balancing, A method according to any one of claims 22 to 30, characterized in that a second condition inspection device (45) is provided to check the condition of the suspension members (20) and to detect damage. • · • · «• · · • * * 1 1 A method according to claim 31, *: 2: 25 characterized in that the suspension means are selected from the group consisting of ·; · 1 · (20) electrically conductive material; and: detecting by the second condition checker (45) * · · '** · 1 ... ..., ···, the condition of the suspension member (20) based on the change in electrical resistance. 30 • 1 The method according to claim 32, characterized in that the suspension elements "· 1: (20) are connected in series; and measured by a second condition control device (45) connected in series. • · 1, · 35 total resistance of the suspension members • · · · 1 · · 1 · · 2 · · 31 118217 Method according to claim 32, characterized in that the suspension means (20) are connected in parallel and the total resistance of the parallel connected suspension means 5 is measured by a second condition checker (45). • 1 · 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • »•« »» »» • • • m ··· ·· t • «• 1 • · • · ·••••••••••••••••• ·· • · · 32 118217