WO2019077002A1

WO2019077002A1 - Device for controlling a speed-limiting belt and electronic speed limiter

Info

Publication number: WO2019077002A1
Application number: PCT/EP2018/078454
Authority: WO
Inventors: René HOLZER; Karl Kriener; Leopold Latschbacher
Original assignee: Wittur Holding Gmbh
Priority date: 2017-10-17
Filing date: 2018-10-17
Publication date: 2019-04-25
Also published as: EP3697713A1; RU2020115597A; EP3697713B1; CN111372880B; RU2020115597A3; DE202017005334U1; CN111372880A

Abstract

The invention relates to a sensor system and preferably a speed-limiting system for a lift with a lift car (3), comprising a speed limiter (9) that travels on a lift car (3), a slack tension medium (10) for fixed tensioning along the travel path of a lift car (3) between two fixing points at which the lower and upper ends of the slack tension medium (10) are anchored, two spring elements (13, 14) that hold the slack tension medium (10) between them that it is tensioned in a floating manner, an actuator (17) for mounting on, or incorporating into, the slack tension medium (10), and a switch (18) actuated by the actuator (17), the actuator (17) being designed such that, when operationally installed, the slack tension medium (10) can move back and forth along a stretch +/- Δ L in relation to the contact without the contact being actuated, and such that the contact is actuated when either a tensile force is generated in the slack tension medium (10), moving the slack tension medium (10) along a stretch of more than - Δ L (in the region of the actuator (17)), or the slack tension medium (10) slackens so much that it moves along a stretch of more than + Δ L.

Description

DEVICE FOR CONTROLLING SPEED BELT AND ELECTRONIC SPEED LIMITER

The invention relates to a device for controlling a speed limiter belt according to the preamble of claim 1.

TECHNICAL BACKGROUND

With elevators of all kinds, the problem arises that impermissible overspeed and in the worst case, the free fall of the elevator car must be mastered. For this purpose, elevators are equipped with a speed limiter and a

Provided brake safety device.

In this case, predominantly mechanical solutions are still used. These look so that an endless Zugmittel- or usually rope loop of a speed limiter belt in the elevator shaft between two pulleys in the shaft head and in the shaft base rotates. The endless rope loop is attached to the car at one point. The car drives so the endless rope loop.

One of said pulleys sits on the shaft of a

Overspeed. Classically, that's one

centrifugally operated speed limiter. If the speed of the idler pulley becomes too large, then such governors become a brake

activated, which reduces the speed of the pulley. As a result, the current over this pulley

Speed limiter belt braked. In this way, there is a relative movement between the Speed limiter belt and the car. This relative movement is usually used to the

To activate brake safety devices - be it by the fact that the speed limiter belt is articulated directly to a lever of the brake safety devices and then by

Stay behind the car itself

Brake safety devices operated, or in that the

Speed limiter belt on a component of a

Contact is fixed and actuates the contact in the course of the described relative movement.

Such speed limiter systems have to cope with relatively large forces and, accordingly, be heavily dimensioned. In addition, they are not completely wear-free.

Because of this, speed limiter systems have already been designed that ride along with the car while driving a traction device, which is fixed in place within the shaft.

However, such speed limiter systems have the problem that it must always be ensured 100 percent control that the traction device, which is driven by the role of the speed limiter, has not unduly elongated and is not torn. For this purpose, the traction means is biased by springs in

Bay kept stretched. It is detected as soon as the tension in the traction means has dropped below a certain limit. However, there is currently no way

regardless of the direction of travel, determine whether the role that the pliable traction device leaves, proper clearance or, for example due to excessive bearing wear or other obstruction is difficult and therefore the proper function can no longer ensure safe. In the known systems also threatens the risk of

Fehlaus solutions by jerky load peaks. Such can on the traction means, for example, by vibrations due to the large free length of the traction means and / or a sharp

Acceleration when starting the car occur - especially in high-speed lifts to overcome major differences in height.

THE OBJECT OF THE INVENTION

In view of this, it is the object of the invention, a

To provide speed limiter system, which responds on the one hand particularly reliable and impermissible changes in length of the system associated limp traction means, such as a possible stiffness of the pliable pulling means departing role, immediately recognizes and signals, and on the other hand particularly interference-proof and in particular

is vibration resistant.

THE INVENTION SOLUTION

This object is achieved by the means of claim 1.

According to the invention, a speed limiter system is proposed for an elevator which has a speed limiter traveling along on the car and a traction device which is slippery as such for stationary clamping along the travel path of a vehicle Car has, between two fixed points at which the lower and upper end of the pliable traction device is anchored

Under such a limp traction means is preferably a belt, but otherwise also a rope or - not preferred, therefore rare - understood a chain. It is therefore an organ which gives way to any load (even a very small, or at least any substantial) load perpendicular to its longitudinal axis, and then, with the aid of the increased tension, increases its load in the direction of its longitudinal axis, along which it is stretched. catch.

The speed limiter system comprises at least two spring elements. Each of the spring elements is on its one side at a fixed point d. H. a fixed point in operation and anchored on its other side to the pliable traction device. The pliable traction means is between the

Keep spring elements floating in one lane. This means that in total only one strand of the limp

Traction along the travel path of the car runs, instead of a Zugtrum and a Leertrum as in systems with circulating between pulleys pliable drag means. The traction means is then "floating" in o. G. Senses or held in the context of the invention tense when it has the opportunity to move a bit far in the direction of its longitudinal axis, along which it is stretched - by the spring element lengthened at one end and shortened at its other end. Otherwise, the pliable traction means but immobile, d. H. it does not work.

Furthermore, the speed limiter system comprises an actuator for attachment to or installation in the pliable traction device and an actuated by the actuator, electrical, mechanical or magnetic switch. The actuator is characterized in that it is designed so that the pliable Traction means, built-in, by the deformation of the spring elements by a distance +/- Δ L relative to the switch can move back and forth without the switch is actuated, wherein Δ L preferably at least 2 cm better at least 2.5 cm and ideally maximum 3.5 cm. This ensures that even larger vibrations of the pliable traction means do not lead to the operation of the switch and thus to an unnecessary decommissioning of the elevator. The same applies mutatis mutandis to when a strong acceleration of the re-starting car jerky stress of the pliable traction means in

Direction of its longitudinal axis occurs. Nevertheless, the actuator is designed so that the contact is actuated when in the

sluggish traction means either a tensile force occurs, which displaces the pliable traction means in the region of the actuator by a distance of more than - Δ L, or the pliable traction device so far slackened that it, again in the range of

Actuator, shifted by a distance of more than + Δ L.

As a result, not only an inadmissible slackening of the limp traction device or even its demolition can be determined. Instead, this way too

be determined whether the pulley, which leaves the pliable traction means is difficult to move over the dimensions and therefore an intolerable condition exists. It is crucial that such a disturbance because of the floating

Keeping hold of the limp traction means at the moment of their first occurrence, regardless of the current direction, can be determined.

In this way, a particularly safe and universally responsive speed limiter system is created. The distance Δ L is preferably at least 15 mm, more preferably at least 30 mm. In addition, protection for a lift equipped with such a speed limitation system as a whole is also claimed.

PREFERRED EMBODIMENTS OF THE INVENTION

It is particularly advantageous to carry out the actuator as a rigid slider, which has a clearance surface with respect to the contact, which can shift relative to the contact, without actuating the contact. At the ends of the clearance surface is followed by a respective ramp for actuating the switch. Due to the length of the clearance surface, the required

Response delay can be specified constructively. Ideally, the slider is only by the pliable

Traction means with or without the direct participation of a

Guided spring element. In the former case, the slider is an integral part of the pliable pulling means, d. H. on both sides a section of the

limp traction means. The slider is so full in the power flow, which runs in the direction of the longitudinal axis of the pliable pulling means through this. In the latter case, one side of the slider is connected to the pliable traction means and the other side of the slider is directly connected to the spring element. The tension of the spring element is then via the slider in the pliable traction means

initiated.

Alternatively, the slide is parallel to the limp

Traction means and its longitudinal axis and is attached to this. Such a design is particularly suitable in cases where the pliable traction means is a rope and the slider z. B. by means of clamps parallel to the rope lying on this can be attached.

It is particularly favorable if the slide is part of a slide guided in a translatory manner on a slide or ball guide. With such a carriage construction is particularly reliably avoided that the slide by an unforeseen

Insichverdrehung or Verzwirbelung the pliable traction device leaves its intended position and then is no longer able to press the contact - although the

Threshold has long been exceeded.

In the latter case, it is ideal if the slider or the slide comprising the slider between one end of the

limp traction means and a spring element is installed or between two sections of the pliable pulling means.

A particularly preferred solution provides that the

semi-rigid traction means on its whole or at least

predominantly length stretched between two holders or jibs, which in turn are attached to a guide rail. The guide rails provide a very secure anchorage for the holders, completely independent of the local masonry quality, the strength of a dowel

would determine. It also simplifies assembly to the

Guide rails very, to give the pliable traction device the necessary bias, since the holder when needed in

Slightly closer to the shaft longitudinal direction can be slightly closer together or mounted slightly further apart, depending on the current length of the limp

Traction means.

For some applications, it is particularly advantageous if a damper is provided. The damper installation is due to the floating clamping of the limp traction means particularly effective. It can help to significantly reduce the vibrations of the pliable traction device occurring during operation.

In other, often preferred cases, however, the mass of the drive pulley is chosen and expected to the expected

Oscillation frequency or natural frequency of the limp

Traction means and its concrete length in the building tuned that it acts on their rotational mass inertia damping and thereby influenced the vibration behavior so that no

excessive or impair the system function

Vibrations occur.

Particularly preferably, the sole or in addition to the above-mentioned paragraph provided embodiment of the bearing or bearing points of the carriage such that a jamming of the mechanism is not possible, but a frictional force in the bearings or bearing points arises, which is chosen so that in Normal operation (ie as long as no overspeed or other prohibited driving conditions occur) occurring

Vibrations of the flexible traction means are attenuated so far that it does not come to a false trip. To achieve a defined state of friction plastic bearings or

Plastic storage points preferred.

It also claims independent protection for an elevator or an elevator system, which is equipped with a system of

pre-signed type is equipped. OTHER, ALSO AUTONOMOUS ASPECTS OF THE INVENTION

Being completely independent as well as in combination with the previously described will provide protection for an elevator

claimed, with a brake and / or safety gear for influencing the car movement and a pickup

equipped with the pickup is attached to the car and moves together with the car, and the pickup one with its ends rigid or elastic between two

Fixed points anchored, limp traction means moves off. The transducer is characterized by the fact that it is bifunctional. The Bifunktionalität is realized by the fact that he realizes a shaft copying on the one hand, by having an electronics that based on the signals generated by the departure of the limp traction means the current

Position or position change and possibly speed of the car determines and outputs to the otherwise elevator control, and on the other hand designed as a speed limiter by additionally an autonomous, d. H. autonomous from a central elevator control, working electronics has, which directly with an electrically operated

Harness is cabled and the holding magnets or the brake safety device in case of impermissible

Movement state de-energized, regularly via an electronic circuit breaker instead of a relay or a contactor.

Such an elevator can be further developed in that its transducer has a drive pulley, which moves from the relatively slippery traction means moving relative to the car

Wrap at least 120 ° better at least

150 "is driven, and the drive disc frictional or preferably positive fit, preferably by placing on a common shaft is coupled to a Inkrementalgeberrad that generates at least one position signal that is (at least) evaluated by an electronics that electrically activates the brake and / or safety gear.

Ideally, the pliable traction means interacts

positive fit with the drive disc of the pickup. This applies to all previously described items or variants.

Ideally, the drive pulley is equipped with in substantially engraved in the radial direction in them form-fitting depressions, can engage in the form-locking elements of the traction means when draining the traction device on the drive pulley, wherein the form-fitting depressions are grooves closed at one of its two end narrow sides and at their

opposite end narrow side to the front side of

Drive disk are open, and in the circumferential direction successively arranged grooves in a regular change to one and the other end face of the drive pulley are open.

In this way, a lateral slippage of the form-fittingly interacting with the drive disc flexible soft traction device can be prevented. At the same time it is possible the

To produce drive wheel very efficiently by casting, by using mold halves, which in both directions parallel to the later intended operating rotational axis of the

Drive pulley can be pulled apart around the

Take drive pulley, with one mold half

Having protrusions, which maps the flanks open towards her grooves, and the other mold half has projections which maps the flanks open towards her grooves.

It is favorable for some applications, if the

Positive locking elements of the pliable traction device each only take part of the width of the pliable traction device transversely to its direction and, seen in the direction perpendicular to the direction / longitudinal axis of the pliable traction means, alternately occupy the one and the other part of the width of the pliable traction device.

Preferably, the interlocking elements are as truncated cones

designed .

It is particularly favorable if the electronics that supply the holding magnet (s) that hold the at least one brake and / or catch device in the ready position comprise a device which measures the current flowing through the holding magnet (s) and then controls the power supply in such a way or that the current flowing through the holding magnet or magnets within a predetermined

Bandwidth is.

At a fixed supply voltage for the holding magnets, the current, which is ultimately driven by the holding magnets, not insignificantly dependent on the environmental parameters, in particular the ambient temperature. This ultimately means that the power supply must be oversized to ensure that even under the most unsatisfactory conditions that the holding force of the holding magnets does not accidentally collapse and the brake and / or safety gear can be addressed, although there is no error that would require such a response , As a result, over the vast majority of plant life, in which moderate

Ambient conditions prevail, an unnecessarily high current is driven through the holding magnet or magnets. This causes unnecessary costs and is detrimental to the energy rating of the system (energy label, etc.). Ideally, the electronics feed the holding magnet (s) via a pulse width modulation device. Thus, pulsed DC can be used, which facilitates the supply with the aid of an emergency battery or an emergency battery - which is important insofar as the electronics and the brake and safety devices would have to remain capable of acting even in the event of a power failure in the building still for a considerable lag time, before then in good time before the exhaust of the emergency battery, etc., the brake and / or Fangvorichtung comes and sets the car to the guide rails. Whereby the remaining capacity of the battery or the battery preferably also still at least another 72 h is enough to continue to supply the electronics without data loss.

LIST OF FIGURES

Fig. 1 gives an overall view of a

elevator according to the invention, here in the form of the preferred design as a cable lift.

2 shows a detail of FIG. 1, the upper

Attachment of the limp traction means in detail depicts.

Fig. 3 shows a detail of Fig. 1, which depicts the lower attachment of the pliable traction means in detail.

4 shows an enlarged in the region of the carriage

Side view of the cutout gem. Fig. 2, obliquely from above. 5 shows an enlarged in the region of the carriage

Side view of the cutout gem. Fig. 2, seen mainly from the side and in another operating state of the switch 18th

FIG. 6 shows a partially cutaway side view of the carriage according to FIG. Fig. 5.

FIG. 7 shows the sensor in the form of a

Speed limiter with closed housing.

FIG. 8 shows the sensor in the form of a

Speed limiter with the housing open, so that the pulleys and the drive pulley become visible.

FIG. 9 shows the sensor in the form of a

Speed limiter from its rear outer side, on which the incremental encoder and the electronics are arranged, with the electronics cover removed.

FIG. 10 shows a close-up view of a drive disk as it is preferably used in the context of the invention.

FIG. 11 shows a section of a sluggish traction means, as may be used together with the drive pulley according to FIG.

FIG. 12 shows a block diagram of the receiver according to the invention in the form of a speed limiter. FIG. 13 shows a principal section of an electronic circuit as can be used for the pulse width modulated supply of a holding magnet.

FIG. 14 shows the preferred use as an actuator

upcoming slide in its preferred concrete embodiment

EMBODIMENT OF THE INVENTION

OVERVIEW

The best overview of a lift according to the invention in its entirety is shown in FIG. 1.

The invention therefore relates to a usually in the form of a

Vertical lift operated elevator system 1. This usually consists of a vertically extending

Car guide rails 2 guided car 3. If the

Elevator installation, as shown here of Figure 1, designed as a cable lift, the car is 3 to a support means 4th

suspended. The support means 4 is usually represented by one or more ropes or by one or more belts. The

Supporting means 4 is guided via a traction sheave 5 to a counterweight 6.

In the majority of cases, the elevator installation is installed in a vertically extending elevator shaft 7. The elevator shaft 7 ends at its top in one

Shaft head SK and on its underside in a shaft bottom SG. The guide shown here of the support means 4, ie the special suspension of the car in bottom block, is purely exemplary.

Regardless of whether the elevator is designed as a cable lift or hydraulic lift, is on the car, usually in

Area of its bottom, at least one

Brake catch device 8 attached. Once it has been activated, it acts on the car guide rails 2. It then brakes the elevator to a standstill and then wedged or jammed the car usually self-reinforcing to the

Guide rails.

In the present case, this brake catch device 8 is activated by an electrical signal, which receives it directly or indirectly from the speed limiter and the Rwegelfall leads to the fact that the power supply for the one or more holding magnets is interrupted.

In the present case, the transducer 9 is also just as

Speed limiter performed, which is preferred. It is therefore consistent and in a striking way of

"Speed Limiter 9", but it is reserved to replace the term everywhere with the term "Transducer 9". The same applies analogously to the term

"Speed limit belt".

The speed limiter 9 is attached to the car 3 here. The speed limiter 9 moves with the car, up and down. With the speed limiter 9 acts

sluggish traction means together, preferably in the form of speed limiter belt 10, wherein alternatively a rope or other limp traction means is conceivable, but not preferred. The Geschwindigkeitsbegrenzerriemem 10 is usually stretched through the entire shaft or over the entire passable length of the elevator track away. The belt is usually only "single lane" stretched, ie it then extends only a single belt through the shaft instead of a forward and a reverse run, as is the case with an endless, carried by the car belt loop.

The speed limiter 10 is replaced by the

Speed limiter 9 started. For this purpose, the speed governor belt 10 is guided via a deflection roller within the speed limiter 9. As soon as there is a relative movement between the

Speed limiting belt 10 and the drive pulley of the speed limiter 9 comes, the drive pulley of the speed limiter is set in rotation by the belt.

As will be explained later, is the

Drive pulley with an incremental encoder wheel on one

common shaft or is at least with a sender wheel

coupled torque transmitting. The encoder wheel is scanned or generates pulses that can be counted. In this way, the current position or hjedenfals the current change in position of the car, the current speed of the car and, if necessary, the current acceleration of the car can be determined.

Typically, in the area of the shaft bottom and the

Shaft head or at both ends of the passable by the car route holder 12 provided for the Geschwindigkeitsbegrenzeriemen 10. Ideally, these holders 12 are cantilevers designed, each with its one end to a

Guide rail or a car guide rail are mounted and project freely into the shaft with its other end, as can be seen by way of example with reference to FIG 1.

Between these holders 12 is the

Speed governor belt 10 resiliently tensioned. For this purpose he is at both his and his own

opposite, the other end via a spring element 13, 14 connected to the respective holder 12. This means that the

Speed limiter 10 as a whole against

Effect of said spring elements 13, 14 a certain

Relative movement in one or the other direction parallel to the longitudinal axis of the shaft run, so "floated" can.

THE END-TERM FIXING OF THE BENDED LOAD ACCESSORIES

In many cases, it is expedient if the pliable traction means or in this case the speed governor belt 10 extends at its lower end and there to its outermost end in the direction parallel to the longitudinal axis L of the shaft, cf. Fig. 1 and Fig. 3. He is then fixed there by means of a spring element 13. The spring element 13, which establishes the connection between the speed governor belt and, for example, the holder 12, is preferably in the form of one or more coil springs or otherwise z. B. executed in the form of one or more disc spring sets.

In addition, it is particularly favorable if at least one end, usually the upper end of the speed limiter belt 10, is deflected in the holder 12 via a deflection roller 11 in such a way that its free end is perpendicular to the direction of travel of the car 3, cf. Fig. 1 and Fig. 2.

Especially in the case of a speed limiter belt 10, the pulley 11 can effectively contribute to reducing the tendency of the belt 10 to twist. Otherwise, such a deflection in the case of using the same to be explained later slide the decisive advantage that the

The weight of the slide - unlike a vertically suspended slide - plays no special role and above all does not increase the tendency to oscillate.

The relevant with regard to the slide details can be seen well with reference to FIGS. 3, 4 and 5 and in particular of FIG. 6.

The carriage 15 is best described with reference to FIG. 4

explain. The carriage has a guide portion 15a. Hereby it is translational in the direction of the longitudinal axis of the immediately adjacent speed limiter belt

movably guided on the holder 12. For this purpose, the guide portion shown in FIG. 6 may be provided with a plurality of slots LL, by means of which it is fixed by means of self-locking screws with the interposition of sleeves and / or discs 16 of sliding material on the holder 12 movable.

Turning again to Fig. 4, one sees how the end of the speed limiter belt on the

Fixing portion 15 c of the carriage 15 is fixed. In the embodiment discussed here, the

Attachment section 15c via one or at least one

Carriage side part 15b to be fixed to the guide portion 15a. As can be seen well with reference to Figures 4 and 5, the carriage 15 carries an actuator 17. Preferably, the actuator 17 has the shape of the slide shown here. Under a slider in the context of the invention is meant a rigid body, preferably in the form of a sheet, which forms a free path 17a. As a rule, the surface of the free path, which generally forms a smooth plane, extends parallel to the direction of the longitudinal axis of the immediately adjacent speed limiter belt. At their two ends, the free path 17a in each case in a switching section or a first and second ramp 17b, 17c

(Switching ramp) over. Each ramp is opposite the

Free section 17a inclined at an angle, usually at an angle between 25 ° and 50 °.

As best seen with reference to FIG. 5, the actuator 17, a switch 18 is associated. The switch may be a non-contact switch, such as a reed contact. In the present case, a mechanical switch 18 is preferably used, for example a switch which rolls the surface of the actuator 17 facing it with a switching roller 18a. As long as the switching roller rolls along the free path 17a, it is not actuated. The actuation takes place by the switching roller one of the switching ramps 17b or 17c climbs, whereby the switch

is depressed. Analogously, the same function will be

realized when no switch roller 18a is provided, but a not figuratively shown switch plunger or the like. The

Actuator slides along.

It should be noted that the carriage mass and / or the

Slide friction can be adjusted so that the Vibrations of the speed limiter 10 belt can be reduced.

FIG. 14 serves to further illustrate the actuator 17 in the form of the slider.

PI shows the position of the switch when the pliable traction means is torn off or at least the lower spring element completely failed.

P2 is the switching point at too low tension of the lower spring element or too high tensile force in the upward direction due to stiff drive pulley and or pulley. As a rule, spring force> traction weight force applies here

P3 is the set point which should be minimized after assembly. As a rule, spring force ~ 2x traction weight applies here.

P4 is the set point that should be reached after installation.

P5 is the switching point if the voltage is too high or too high

Traction in the downward direction.

The working range in the normal range is between point 3 and 4 with an additional safety reserve of min. 50% P * in both directions (pt. 2 and 5) is provided for short-term force peaks, which are not caused by the

To allow friction damping to be included. The length of an arrow P * of the arrows P * of the same length is preferably in the range between 15 mm and 35 mm. The topmost arrow is preferably about 0.25 P * long.

The ramp angle ALPA is preferably 45 ° + / 10%.

THE RECIPIENT BZW. SPEED LIMITATION

FIGS. 7 to 9 illustrate the pick-up, which preferably operates bifunctionally in this exemplary embodiment and is therefore referred to below as a speed limiter 9.

As can be seen well with reference to FIGS. 7 and 9, the

Speed limiter may be attached to a preferably L-shaped designed retaining foot 19, which ideally provides a plurality of slots 20 or hole fields for positionally variable attachment. It is a housing box 21 is provided. It provides an in-flight F (dashed line, Fig. 8) lying inlet and outlet 22 for the Geschwindigkeitsbegrenzeriemen 9. Between the two side walls S of the housing box sleeves 24 are clamped, which form at least for the pulleys 23 bearing axes. The drive pulley 25 is mounted on and between the two side walls of the housing box. The two pulleys 23 ensure that the

Speed limiter belt wraps around the drive pulley 25 at least at an angle of 120 °, better 150 ° as shown here. The shaft on which the drive disk sits penetrates a side wall of the housing box and protrudes into the area on the back of the housing box to which the electronics 27 is attached. There sits a Inkrementalgeberrad 26 on the Stub shaft. The incremental encoder wheel 26 is scanned by a plurality of sensors 28, z. B. in the form of non-contact Hall sensors. The pulses thus generated are added up for position determination with direction-dependent sign and can speed and / or

Acceleration are differentiated.

The electronics 27 is bifunctional.

On the one hand, it generates at least one position signal or

Position change signal, possibly also a

Speed signal and / or an acceleration signal. This signal can be processed purely internally. If necessary, it can also be passed on to the central elevator control, the z. B. at a suitable location in the shaft or in the

Engine room is housed.

On the other hand, the electronics 27 are designed and trained so that they autonomously, without support by or participation of the central elevator control, can make a decision on whether a prohibited driving condition exists (eg.

Overspeed while driving or "unintended car movement" in front of a stop)

determined driving condition, then it triggers the Bremsbzw. Safety brake device off. The triggering is preferably carried out by the fact that the electronics 27, which is so far connected directly or connected to the or the brake or brake catch device held holding electromagnet or wired, the or said electromagnet de-energized - usually using a power electronics. In this way, a system is created whose

Operational readiness and function can be monitored completely electronically, which is the case with the previous relay-controlled

Holding magnet is not the case.

FIG. 11 shows a block diagram of the pickup here with the function of a speed limiter.

The external power supply 30 feeds an emergency power unit 31, usually in the form of an emergency power battery or a backup battery. The emergency generator 31 in turn feeds the electronics 17 and the encoder 32 and the associated electronics. The electronics 17 in turn receives data input from the

Encoder and optionally also, as indicated at 35, via a link to another controller, for example, the central elevator control. Via this link, a communication can also be made to the other elevator control, for example, the central set up.

The electronics 17 interrupts when the conditions

present, via the safety switch 33 the safety circuit. An actuation of the safety switch 33 also leads to the circuit supplying the holding magnet or magnets

is interrupted.

The electronics 17 also supplies the holding magnet or magnets with the required current. Preferably, this is done in a current-controlled or current-controlled manner. For this purpose, the electronics 17 comprise a device which measures the current flowing through the holding magnet or magnets and then controls or regulates the power supply in such a way that the current which is currently flowing through the holding magnet or magnets within one or more of the holding magnets predetermined bandwidth, ie at a predetermined value +/- a certain tolerance amount, typically less than 10%.

An illustration of this is provided by FIG. 13. At a suitable location of one of the components of the electronics 17, a pulse width modulation signal PWM is tapped. This is an electronic circuit breaker 36 is controlled, which then gives timed voltage or interrupts. Corresponding voltage pulses then flow to the holding magnet 34, which drive the desired current on average.

THE DRIVE PLATE AND THE ASSEMBLED BENDED PLAQUE

FIG. 10 shows a close-up view of the drive pulley which is not necessarily used here, but which is preferably used. It is equipped with form-fitting recesses, in which the

Form-fitting elements of the traction means can insert when draining the traction device on the drive pulley. The

Form-fitting depressions are grooves N, which are closed at one of its two end narrow sides (namely, the narrow side 29 of the face) and open at its opposite end narrow side to the end face of the drive pulley. In the circumferential direction successively arranged grooves in the regular, ideally in the groove to groove following change to one and the other end of the

Drive pulley open. The resulting advantages are mentioned in the introduction.

The pliable traction means, with such a

Drive disc cooperates may be designed as shown in Fig. 11. Here take the form-fitting elements F of limp traction means 10 each occupy only a portion of the width of the pliable traction device 10. Seen in the direction of the longitudinal axis LA of the slippery traction mechanism 10, the interlocking elements F take alternately one and the other part of the width of the pliable traction device 10 a. Such a construction in conjunction with the specially designed

Drive pulley guarantees a particularly smooth running.

Where the pliable traction means should be particularly inexpensive one sees it along its longitudinal axis LA only with a single row, for example, such form-fitting elements, as shown in FIG. 11. These interlocking elements are then, one in an alignment behind the other, centrally positioned on the pliable traction means 10, in a bending slack traction means, as shown in FIG. 11, ie along the longitudinal axis LA. This is not graphically illustrated but with the help of Fig. 11 in conjunction with the just given hints easily imaginable.

FINAL REMARK

The design of the actuator 17 in the form of a slider is the simplest and most reliable and therefore clearly andre

To prefer designs.

For patent law reasons, however, the following should be noted:

In particular, where the pliable traction means is guided over a roller but can also represent a corresponding function hereby by providing a corresponding dead zone between two switching positions, which operates the role. So could the role z. B. coupled with a cam, which is usually at 9 o'clock position (in trouble-free

Normal operation) and which falls below 6 o clock in case of cracking or elongation of flexible traction means and then switches and at too high upward move position 12 o'clock üner strides and then also switched.

LIST OF REFERENCE NUMBERS

1 lift system

2 guide rails

3 car

4 suspension elements

5 traction sheave

6 counterweight

7 elevator shaft

8 brake safety devices or brake and / or safety gear

9 speed limiters

10 limp traction means, z. B. in the shape of the

Geschwindigkeitsbegrenzerriemens

11 pulley in the holder for the

Geschwindigkeitsbegrenzerriemen

12 Speed Limiter Strap Holder

13 lower spring element

14 upper spring element

15 sleds

15a guide section of the carriage

15b carriage side part

15c attachment section

16 disc of sliding material

17 actuator

17a free distance

17b first ramp

17c second ramp

18 switches

18a switch role 19 Hold-down foot of the speed limiter

20 long holes

21 housing box

22 Inlet and outlet of the housing box

23 pulley

24 sleeve

25 drive pulley

26 incremental encoder wheel

27 electronics

28 sensors

29 closed end narrow side of a groove

30 external supply voltage 24V

31 emergency power device usually as a backup battery or

backup battery

32 encoder, generates position change signal

33 Safety switch or safety circuit

34 holding magnet of a brake and / or safety gear

35 Link to another controller z. B. the central elevator control

36 Circuit-breakers for pulse width modulation

L longitudinal axis of the shaft

LA longitudinal axis of the limp traction device

LL slot in the carriage

SK shaft head

SG shaft base

F escape

S sidewall

N groove

P * length arrow

PI to P5 Operational points of a slider designed actuator

Claims

PATENTAN'S PRIDE

1. pick-up system and preferred

Speed limiter system for a lift with a car (3), with one on a car (3) driving

Speed limiter (9), with a limp traction means (10) for fixed clamping along the travel path of a car (3) between two fixed points, at which the lower and upper end of the pliable traction means (10) is anchored, with two spring elements (13, 14 ), which hold between them the pliable traction means (10) floatingly stretched, and with an actuator (17) for attachment to or installation in the pliable traction means (10) and with one of the actuator (17) actuated switch (18), characterized characterized in that the actuator (17) is so

is designed so that the pliable traction means (10) can be installed ready to move a distance +/- Δ L relative to the contact back and forth without the contact being actuated, and is designed so that the contact is actuated when in the limp traction means (10) either a tensile force occurs, which the pliable traction means (10) (in the region of the actuator 17) to a

Range of more than - Δ L shifts, or that

sluggish traction means (10) so far slackened that it moves by a distance of more than + Δ L.

2. System according to claim 1, characterized in that the actuator (17) is a rigid slider, which relative to the switch (18) has a free path (17a), at the ends of each a ramp (17b, 17c) for actuating the Switch (18) connects.

3. System according to claim 2, characterized in that the slide is guided exclusively by the pliable traction means (10) with or without the direct involvement of a spring.

4. System according to claim 3, characterized in that the slide is mounted parallel to the pliable traction means (10) and its longitudinal axis (LA) on this.

5. System according to claim 2, characterized in that the slide is part of a slide or ball guide translationally guided carriage (15).

6. System according to claim 3 or claim 5, characterized

in that the slider or slide (15) comprising the slider is connected between one end of the slide

limp traction means (10) and a spring element (13, 14) is installed or between two sections of the pliable traction means (10).

7. System according to any one of the preceding claims, characterized in that the pliable traction means (10) is held stretched over its entire or at least predominant length between two cantilevers, which in turn are fastened to a guide rail (2).

8. System according to any one of the preceding claims, characterized in that a damper is provided which reduces the vibrations of the pliable traction means (10).

9. System according to one of the preceding claims, characterized

characterized in that the upper spring element (14) so

is dimensioned such that its spring force is greater than the weight force of the pliable traction means (10), so that the upper spring element (14) also lifts the pliable traction means (10) when the lower spring element (13)

slumped or completely failed and thereby predominantly or completely tensionless.

10. Elevator with a system, preferably in the form of a

Speed limiter system, according to one of

previous claims.

11. Elevator, preferably with a system according to one of

previous claims, with a brake and / or

Safety gear (8) for influencing the car movement and a receiver (9), wherein the transducer (9) is mounted on the car (3) and together with the

Car (3) moves, and the transducer (9) with its ends rigid or elastic between two fixed points

anchored, limp traction means (10), characterized in that the transducer (9) is bifunctional, on the one hand realizes a shaft copying, because he has an electronics (27), based on the by the departure of the pliable traction means (10) generated signals determines the current position or position change of the car (3) and to the other

Elevator control outputs, and on the other hand as

Speed limiter (9) is designed by additionally having autonomous electronics (27), the directly with an electrically operated

Brake catch device (8) is wired and the one or more holding magnet of the brake safety device (8) in the event of an inadmissible state of motion switches de-energized.

12. Elevator according to claim 10 or 11, characterized in that the speed limiter (9) has a drive pulley (25), which differs from the relative to the car (3)

moving limber traction means (10) is wrapped under at least 120 °, preferably at least 150 °, and the drive disc (25) positively, preferably by arrangement on a common shaft, with a

Incrementalgeberrad (26) is coupled, which generates at least one position signal, which is evaluated by an electronic unit (27), which electrically activates the brake and / or catching device (8).

13. Elevator according to claim 10 or 11, characterized in that the pliable traction means (10) form-fitting with the

Drive pulley (25) of the speed limiter (9) interacts.

14. Elevator according to claim 13, characterized in that the

Drive pulley is equipped with form-fitting depressions, can engage in the form-locking elements of the traction means when draining the traction device on the drive pulley, wherein the form-fitting depressions are grooves which are closed at one of its two end narrow sides and at its opposite end narrow side to the front side

Drive pulley are open, and in the circumferential direction

successively arranged grooves in a regular change to one and the other end face of the drive pulley are open.

15. Elevator according to claim 14, characterized in that the positive locking elements of the pliable traction means (10) each only a part of the width of the limp

Take traction means (10) and, either in the direction of

Seen longitudinal axis (LA) of the pliable traction means (10), alternately occupy the one and the other part of the width of the pliable traction means (10) or seen in the direction of the longitudinal axis (LA) of the pliable traction means (10), only part of the width of the limp Traction means (10) occupy and in relation to the width of the sleeper

Traction means are positioned centrally on this.

16. Elevator according to claim 10 or 11, characterized in that the positive-locking elements are designed as truncated cones.

17. Elevator according to one of the preceding claims, characterized in that the electronics (17) holding the holding magnet or the at least one brake and / or catching device in the standby position comprises a device which by the or the holding magnet measures flowing current and then controls or regulates the power supply so that the current flowing through the holding magnet or the current is within a predetermined bandwidth.

18. Elevator according to claim 17, characterized in that the electronics feeds the holding magnet or magnets via a device for pulse width modulation.