DE202017005334U1 - Device for controlling a speed limiter belt and electronic speed limiter - Google Patents

Abstract

Pickup system and preferred
Speed limiter system for a lift with a car (3), with
a speed limiter (9) traveling on a car (3),
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 semi-rigid traction means (10)
and with a switch (18) actuated by the actuator (17),
characterized in that the actuator (17) is designed so that the pliable traction means (10) operably installed can move a distance +/- Δ L relative to the contact back and forth, without the contact is actuated, and is designed in that the contact is actuated when either a tensile force occurs in the pliable traction mechanism (10) and displaces the pliable traction means (10) (in the region of the actuator 17) by a distance of more than -Δ L, or the traction means ( 10) so far that it shifts by a distance of more than + Δ L.

Description

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 provided with a speed limiter and a safety brake device.

In this case, predominantly mechanical solutions are still used. These look like 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 speed limiter. Classically, this is a centrifugally operated speed limiter. If the speed of the guide roller of the overspeed governor is too large, then such a brake is activated, which reduces the speed of the pulley. As a result, the speed governor belt running over this deflection roller is braked. In this way there is a relative movement between the speed governor belt and the car. This relative movement is usually used to activate the 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 actuated by the lag behind the car itself, the brake safety devices, or in that the speed limiter belt on a Part 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.

In such speed limiter systems, however, there is 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 held in the shaft clamped. It is detected as soon as the tension in the traction means has dropped below a certain limit. However, there is so far no way to determine regardless of the direction of travel, whether the role that drives the pliable traction means has proper clearance or is difficult, for example, due to excessive bearing wear or other obstruction and therefore the proper function can no longer ensure safe. In the known systems also threatens the risk of false triggering by jerky load peaks. Such may occur on the traction means, for example due to vibrations due to the large free length of the traction device and / or a sharp acceleration when starting the car - especially in high-speed elevators to overcome larger differences in height.

THE OBJECT OF THE INVENTION

In view of this, it is the object of the invention to provide a speed limiter system, which responds on the one hand particularly reliable and impermissible changes in length of the system associated with pliable 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 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 driving along on the car and a traction means for fixed clamping along the travel path of a car, 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 thus an organ that affects everyone (even a very small, or at least any material) burden Dodge perpendicular to its longitudinal axis to then absorb the stress using the increased by the tension in the direction of its longitudinal axis along which it is stretched.

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 will keep floating between the spring elements and indeed single track. This means that a total of only one strand of the pliable traction device runs along the travel path of the car, instead of a traction and an empty strand as in systems with circulating between pulleys pliable traction devices. 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, installed ready to move back by the deformation of the spring elements by a distance +/- Δ L relative to the switch back and forth without the switch actuated is preferably at least 2 cm better at least 2.5 cm, and ideally at most 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 analogously when a sudden acceleration of the pliable traction device occurs in the direction of its longitudinal axis during a strong acceleration of the re-starting car. Nevertheless, the actuator is designed so that the contact is actuated when in the pliable 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, in turn, in the area of the 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, it can also be determined in this way whether the deflection roller, which leaves the pliable traction means, is sluggish over the dimensions and therefore an intolerable condition exists. It is crucial that such a fault because of the floating Gespannthaltens the pliable 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 guided exclusively by the pliable traction means with or without the direct involvement of a spring element. In the former case, the slider is an integral part of the pliable pulling means, d. H. on both sides is followed by 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 introduced via the slide in the pliable traction means.

Alternatively, the slide is parallel to the pliable traction means and its longitudinal axis and is fixed thereto. Such a design is particularly useful 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 due to an unforeseen Insichverdrehung or Verzwirbelung the pliable traction means its intended Leaves position and then is no longer able to press the contact - although the threshold itself has long been exceeded.

In the latter case, it is ideal if the slide or slide comprising the slider is installed between one end of the pliable traction means and a spring element or between two sections of the pliable traction means.

A particularly preferred solution provides that the pliable traction means is held stretched over its entire or at least predominant length between two holders or jibs, which in turn are fastened to a guide rail. The guide rails provide a very secure anchorage for the holders, completely independent of the local masonry quality, which would determine the strength of a dowel. In addition, it simplifies the mounting on the guide rails very much to give the pliable traction device the necessary bias, as the holder can be easily slightly closer together or mounted slightly further apart in the shaft longitudinal direction, depending on the current length of the pliable traction device.

For some applications, it is particularly advantageous if a damper is provided. The damper installation is particularly effective due to the floating clamping of the pliable traction means. 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 tuned to the expected oscillation frequency or natural frequency of the pliable traction device and its concrete length in the building that it acts damping on their rotational inertia and thus influenced the vibration behavior, that no excessive or the system function impairing 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. In order to achieve a defined state of friction, plastic bearings or plastic bearing points are preferred.

It also claimed independent protection for an elevator or an elevator system, which is equipped with a system of pre-marked type.

OTHER, ALSO AUTONOMOUS ASPECTS OF THE INVENTION

Both completely independently and in combination with the above, protection is claimed for a lift equipped with a brake and / or safety device for influencing the car movement and a pick-up, the pick-up being attached to the car and coming together moved to the car, and the pickup a rigidly or elastically anchored with its ends between two fixed points, limp traction means moves away. The transducer is characterized by the fact that it is bifunctional. The Bifunktionalität is realized by the fact that he realized on the one hand a shaft copying by having an electronics that determines the current position or position change and possibly speed of the car based on the signals generated by the departure of the limp traction means and outputs to the otherwise elevator control, and on the other hand designed as a speed limiter, by additionally providing an autonomous, d. H. autonomous from a central elevator control, has working electronics which is wired directly to an electrically actuated safety brake device and the holding magnets of the safety brake device in the event of an inadmissible state of motion 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 is better driven at least 150 ° of the relative to the car moving pliable traction device under at least 120 °, and the drive pulley frictionally or preferably positively, preferably by arrangement a common shaft is coupled to a Inkrementalgeberrad that generates at least one position signal that is (at least) evaluated by an electronic that activates the brake and / or safety gear electrically.

Ideally, the pliable pulling means interacts positively with the drive disk of the pickup. This applies to all previously described items or variants.

Ideally, the drive pulley is equipped with keyed recesses buried therein substantially in the radial direction, in itself the positive engagement elements of the traction means can insert over the drive pulley during draining of the traction means, wherein the form-fitting depressions are grooves which are closed at one of its two end narrow sides and open at its opposite end narrow side to the end face of the drive pulley, and in the circumferential direction successively arranged grooves in a regular change to one and are open to the other end face of the drive pulley.

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 to produce the drive pulley very efficiently by casting by using mold halves which can be pulled apart in both directions parallel to the later intended operating rotational axis of the drive pulley to demold the drive pulley, wherein the one mold half has projections which open the flank towards her Grooves maps, and the other mold half has projections that maps the flanks open to her flutes.

It is favorable for many applications, when the interlocking elements of the pliable traction device occupy only a portion of the width of the pliable traction device transversely to its direction and, viewed in the direction perpendicular to the running direction / longitudinal axis of the pliable traction device, alternately one and the other part of the width take the slippery traction device.

Preferably, the interlocking elements are designed as truncated cones.

It is particularly favorable if the electronics that supply the holding magnet (s) holding 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 the power supply such controls or regulates that the currently flowing through the holding magnet or the current is within a predetermined bandwidth.

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, an unnecessarily high current is driven through the holding magnet (s) over the majority of the life of the system, in which moderate environmental conditions prevail. 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

• The 1 gives an overall view of a lift according to the invention, here in the form of the preferred design as a cable lift.
• The 2 shows a part of the 1 , which depicts the upper attachment of the pliable traction device in detail.
• The 3 shows a part of the 1 , which depicts the lower attachment of the pliable traction device in detail.
• The 4 shows an enlarged in the area of the carriage side view of the section gem. 2 , diagonally from above.
• The 5 shows an enlarged in the area of the carriage side view of the section gem. 2 , seen mainly from the side and in another operating state of the switch 18 ,
• The 6 shows a partially cutaway side view of the carriage gem. 5 ,
• The 7 shows the transducer in the form of a speed limiter with the housing closed.
• The 8th shows the transducer in the form of a speed limiter with the housing open so that the pulleys and the drive pulley are visible.
• The 9 shows the transducer in the form of a speed limiter of his backward outside, on which the incremental encoder wheel and the electronics are arranged, with the electronics cover removed.
• The 10 shows a close-up of a drive pulley as it is preferably used in the invention.
• The 11 shows a section of a pliable traction means as it along with the drive pulley according to 10 can be used.
• The 12 shows a block diagram of the invention according to the invention in the form of a speed limiter.
• The 13 shows a basic section of an electronic circuit as it can be used for the pulse width modulated supply of a holding magnet.
• The 14 shows the slider preferably used as an actuator for use in its preferred specific embodiment

EMBODIMENT OF THE INVENTION

OVERVIEW

The best overview of a lift according to the invention in its entirety are the 1 ,

Accordingly, the invention relates to a lift system, usually in the form of a vertical elevator 1 , This regularly consists of a vertically extending car guide rails 2 guided car 3 , Unless the elevator system, like here from 1 shown, designed as a cable lift is the car 3 on a suspension element 4 suspended. The suspension 4 is usually represented by one or more ropes or by one or more straps. The suspension 4 is about a traction sheave 5 to a counterweight 6 guided.

In the vast majority of cases, the elevator installation is in a vertically extending elevator shaft 7 Installed. The elevator shaft 7 ends at its top in a shaft head SK and on its underside in a shaft bottom SG , The guide shown here the suspension 4 , ie the special suspension of the car in bottom block, is purely exemplary.

Completely independent of whether the elevator is designed as a cable lift or hydraulic lift, is at the car, usually in the region of the underside, at least one brake device 8th appropriate. Once 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 on the guide rails.

In the present case, this safety brake device 8th activated by an electrical signal that receives it directly or indirectly from the speed limiter and that leads in Rwegelfall that the power supply for the holding magnet or is interrupted.

In the present case, the pickup 9 just run as a speed limiter, which is preferred. It is therefore consistently and in a striking way of "speed limiter 9" the speech. However, it is reserved to replace the term everywhere with the term "sensor 9". The same applies to the term "speed governor belt".

The speed limiter 9 is here on the car 3 attached. The speed limiter 9 drives the car up and down. With the speed limiter 9 acts a limp traction means together, preferably in the form of speed limiter belt 10 Alternatively, a rope or other limp traction means is conceivable, but not preferred. The speed limiter belt 10 As a rule, it is stretched through the entire shaft or over the entire passable length of the elevator section. 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 belt 10 is from the speed limiter 9 left. For this purpose, the speed governor belt 10 via a pulley within the speed limiter 9 guided. Once there is a relative movement between the speed governor 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 in more detail later, the drive pulley is provided with an incremental encoder wheel on a common shaft or is at least coupled to transmit torque to transmit a donor wheel. 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 for the speed limiter belt 10 intended. Ideally, these are holders 12 designed as a boom, which are each attached with its one end to a guide rail or a car guide rail and protrude freely with its other end in the shaft, so, as the basis of the 1 can be seen by way of example.

Between these holders 12 is the speed governor belt 10 springy cocked. For this purpose, it is both at its one and at its opposite, other end via a spring element 13 . 14 with the respective holder 12 connected. This means that the speed limiter belt 10 as a whole against the action of said spring elements 13 . 14 perform a certain relative movement in one or the other direction parallel to the longitudinal axis of the shaft, so "float" can.

THE END-TERM FIXING OF THE BENDED LOAD ACCESSORIES

In many cases, it is useful if the pliable traction means or here the Geschwindigkeitsbegrenzer belt 10 at its lower end and there to its outermost end in the direction parallel to the longitudinal axis L of the shaft extends, cf. 1 and 3 , He is then there by means of a spring element 13 attached. The spring element 13 that is the connection between the speed governor belt and, for example, the holder 12 is preferably, shape 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 , via a pulley 11 in the holder 12 is deflected so that its free end perpendicular to the direction of travel of the car 3 runs, cf. 1 and 2 ,

Especially in the case of a speed limiter belt 10 can the pulley 11 quite effectively contribute to the tendency of the belt 10 to reduce, to twist. Otherwise, such a deflection in the case of using the carriage to be explained in more detail to the decisive advantage that the weight of the carriage - unlike a vertically suspended carriage - does not play a special role and above all does not increase the tendency to oscillate.

The relevant in terms of the slide details can be seen well on the basis 3 . 4 and 5 and in particular the 6 ,

The sled 15 is best based on the 4 explain. The carriage has a guide section 15a , Hereby he is translationally in the direction of the longitudinal axis of the immediately adjacent speed limiter belt movable on the holder 12 guided. For this purpose, the guide section shown in the 6 with several slots LL equipped, by means of which he self-locking screws with the interposition of sleeves and / or discs 16 made of sliding material on the holder 12 is fixed.

Turning back to the 4 to, then you can see how the end of the speed limiter belt at the attachment section 15c of the sled 15 is fixed. In the embodiment discussed here, the attachment portion 15c via one or at least one carriage side part 15b at the guide section 15a be set.

How good on the basis of 4 and 5 The carriage is visible 15 an actuator 17 , Preferably, the actuator has 17 the shape of the slider shown here. Under a slider in the context of the invention is meant a rigid body, preferably in the form of a sheet, the free travel 17a formed. 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 both ends of the course goes the freestyle 17a each in a switching section and a first and second ramp 17b . 17c (Switching ramp) over. Each switching ramp is opposite the free course 17a inclined at an angle, usually at an angle between 25 ° and 50 °.

How best to use the 5 looks, is the actuator 17 a switch 18 assigned. The switch may be a non-contact switch, such as a reed contact. In the present case, a mechanical switch is preferred 18 used, such as a switch, with a switching roller 18a the surface of the actuator facing it 17 rolls. As long as the switching role the free distance 17a rolls along, it is not pressed. 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 is realized when no switching role 18a is provided, but a not figuratively shown switch plunger or the like. Slides along the actuator.

It should be noted that the carriage mass and / or the slide friction can be adjusted so that the vibrations of the speed limiter belt 10 be reduced.

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

P1 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 force applies here.

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

P5 is the switching point when the voltage is too high or the pulling force is too high in the downward direction.

The working area in the normal range is between point 3 and 4 On both sides an additional safety reserve of min. 50% P * in both directions (points 2 and 5) is provided to allow short-term force peaks, which are not absorbed by the friction damping.

The length of an arrow P * the same long arrows P * 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

The 7 to 9 illustrate the pickup, which preferably works bifunctional in this embodiment and therefore below as a speed limiter 9 referred to as.

How to be good on the basis of 7 and 9 sees, the speed limiter on a preferably L-shaped holding foot 19 be attached, the ideally several slots 20 or hole fields for positionally variable attachment offers. It is a housing box 21 intended. He offers one another in a run F (dashed line, 8th ) lying inlet and outlet 22 for the speed limiter belt 9 , Between the two side walls S of the housing box are sleeves 24 braced, at least for the pulleys 23 Form bearing axes. Also the drive pulley 25 is mounted on and between the two side walls of the housing box. The two pulleys 23 Make sure that the speed limiter strap is the drive pulley 25 wraps around at least at an angle of 120 °, better, as shown here, 150 °. 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, on which the electronics 27 is attached. There is an incremental encoder wheel 26 on the stub shaft. The incremental encoder wheel 26 is made by several sensors 28 scanned, z. B. in the form of non-contact Hall sensors. The pulses generated in this way are added up for position determination with a direction-dependent sign and can be differentiated for speed and / or acceleration determination.

The Electronic 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. is placed at a suitable location in the shaft or in the engine room.

On the other hand, the electronics 27 designed and trained so that it can autonomously decide, without the assistance or assistance of the central elevator control, whether a prohibited driving condition exists (eg overspeed while driving or "unintended car movement" in front of a stop). If it has detected such a prohibited driving condition, then triggers the brake or brake device. The triggering is preferably carried out in that the electronics 27 , which in this respect is directly connected or wired to the or the brake or the brake catch device released holding electromagnets, the one or said electromagnet deenergized - usually with the help of power electronics.

In this way, a system is created whose operational readiness and function can be monitored completely electronically, which is not the case with the previous relay-controlled holding magnets.

The 11 shows a block diagram of the on-picker here with the function of a speed limiter.

The external power supply 30 feeds an emergency generator 31 , usually in the form of an emergency battery or a backup battery. The emergency generator 31 in turn feeds the electronics 17 and the encoder 32 and the associated electronics. The Electronic 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 controller. Via this link, a communication can also be made to the other elevator control, for example, the central set up.

The Electronic 17 interrupts, if the conditions are met, via the safety switch 33 the safety circuit. An operation of the safety switch 33 also causes the circuit supplying the magnet or magnets to be interrupted.

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

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

THE DRIVE PLATE AND THE ASSEMBLED BENDED PLAQUE

The 10 shows a close-up of here not necessarily but preferably used for use drive pulley. It is equipped with form-fitting depressions, in which the form-locking elements of the traction means can insert when draining the traction device on the drive pulley. The form-fitting recesses are grooves N , on one of its two narrow sides (namely, the narrow side of the face 29 ) are closed and open at its opposite end narrow side to the front side of the drive pulley. In the circumferential direction successively arranged grooves in the regular, ideally in the following from groove to groove change to one and the other end face of the drive disc out. The resulting advantages are mentioned in the introduction.

The pliable traction means, which cooperates with such a drive pulley can be designed as from 11 shown. Here take the positive locking elements F the limp traction means 10 only one part of the width of the pliable traction device 10 taking. In the direction of the longitudinal axis LA the limp traction means 10 Seen, take the form-locking elements F alternately one and the other part of the width of the limp traction means 10 one. 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, it is provided along its longitudinal axis LA only with a single row, for example, such form-fitting elements, as they 11 shows. These form-locking elements are then, one in a flight behind the other, centered on the pliable traction means 10 positioned, with a limp traction means, like it 11 shows, ie along the longitudinal axis LA , This is not shown graphically but on the hand of the 11 easily imaginable in combination with the hints just given.

FINAL REMARK

The design of the actuator 17 in the form of a slider is the simplest and most reliable and therefore clearly preferred to other designs.

For reasons of patent law, however, the following should be noted: In particular, where the pliable traction means is guided over a roller, a corresponding function can also be represented hereby by providing a corresponding dead-track between two switching positions which actuates the roller. So could the role z. B. coupled with a cam, usually in position 9 Clock stands (in trouble-free normal operation) and in the case of cracking or elongation of the flexible traction means position 6 Clock falls below and then switches and in too high up position 12 Turns on clock and then also switches.

LIST OF REFERENCE NUMBERS

1

elevator system

2

guide rails

3

car

4

support means

5

traction sheave

6

counterweight

7

elevator shaft

8th

Brake safety devices or brake and / or safety gear

9

overspeed

10

limp traction means, z. B. in the form of the speed limiter belt

11

Deflection pulley in the speed governor belt holder

12

Holder for the speed limiter belt

13

lower spring element

14

upper spring element

15

carriage

15a

Guide section of the carriage

15b

Carriage side part

15c

attachment section

16

Slice of sliding material

17

actuator

17a

free-range

17b

first ramp

17c

second ramp

18

switch

18a

switching role

19

Holding foot of the speed limiter

20

slots

21

housing case

22

Inlet and outlet of the housing box

23

idler pulley

24

shell

25

sheave

26

Inkrementalgeberrad

27

electronics

28

sensors

29

Closed narrow end of a groove

30

external supply voltage 24V

31

Emergency power device usually as backup battery or emergency 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 breaker for pulse width modulation

L

Longitudinal axis of the shaft

LA

Longitudinal axis of the limp traction device

LL

Slot in the sledge

SK

wellhead

SG

Schacht reason

F

flight

S

Side wall

N

groove

P *

length arrow

P1 to P5

Operational points of a slider designed actuator

Claims (18)

Pick-up system and preferably speed limiter system for a lift with a car (3), with a speed limiter (9) driving along on a car (3), 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) holding 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 in that the actuator (17) is designed so that the pliable traction means (10) operatively installed a distance +/- Δ L can reciprocate relative to the contact without the contact being actuated and is designed to actuate the contact when e Neither a tensile force occurs, which displaces the pliable traction device (10) (in the region of the actuator 17) by a distance of more than -Δ L, or the pliable traction device (10) so far slackens that it is a distance of more than + Δ L shifted. System after Claim 1 , characterized in that the actuator (17) is a rigid slide, which opposite the switch (18) has a free path (17a), at the ends of each of which a ramp (17b, 17c) for actuating the switch (18) connects. System after Claim 2 , characterized in that the slider is guided exclusively by the pliable traction means (10) with or without the direct involvement of a spring. System after Claim 3 , characterized in that the slider is parallel to the pliable traction means (10) and its longitudinal axis (LA) attached thereto. System after Claim 2 , characterized in that the slide is part of a on a sliding or ball guide translationally guided slide (15). System after Claim 3 or Claim 5 , characterized in that the slide or slide comprising the slide (15) between one end of the pliable traction means (10) and a spring element (13, 14) is installed or between two sections of the pliable traction means (10). System according to 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). System according to one of the preceding claims, characterized in that a damper is provided which reduces the vibrations of the pliable traction means (10). System according to one of the preceding claims, characterized in that the upper spring element (14) is dimensioned so that its spring force is greater than the weight of the pliable traction means (10), so that the upper spring element (14) the pliable traction means (10). also raises when the lower spring element (13) slackened or completely failed and thereby predominantly or completely de-energized. Elevator with a system, preferably in the form of a speed limiter system, according to one of the preceding claims. Elevator, preferably with a system according to one of the preceding claims, with a braking and / or catching device (8) for influencing the car movement and a pick-up (9), wherein the pick-up (9) is attached to the car (3) and itself moved together with the car (3), and the transducer (9) with its ends rigidly or elastically anchored between two fixed points, pliable traction means (10), characterized in that the transducer (9) is bifunctional by one hand a Schachtkopierung realizes because he has an electronics (27), which determines the current position or position change of the car (3) and outputs to the otherwise elevator control based on the signals generated by the departure of the pliable traction means (10) and on the other hand as a speed limiter ( 9) is designed by additionally having an autonomously operating electronics (27) which directly with an electrically actuated ren brake catching device (8) is wired and the one or more holding magnets of the brake safety device (8) in the event of an inadmissible state of motion switches de-energized. Elevator after Claim 10 or 11 , characterized in that the speed limiter (9) has a drive pulley (25), which is driven by the relative to the car (3) moving pliable traction means (10) by looping at least 120 °, more preferably at least 150 °, and the drive pulley (25) positively, preferably by arrangement on a common shaft, with an incremental encoder wheel (26) is coupled, which generates at least one position signal, which is evaluated by an electronic unit (27), the brake and / or catching device (8) electrically activated. Elevator after Claim 10 or 11 , characterized in that the pliable traction means (10) interacts positively with the drive pulley (25) of the speed limiter (9). Elevator after 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, the form-fitting depressions are grooves closed at one of its two end narrow sides and at its opposite end narrow side to the end face of the 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. Elevator after Claim 14 , characterized in that the interlocking elements of the pliable traction means (10) occupy only a portion of the width of the pliable traction means (10) and, either in the direction of the longitudinal axis (LA) of the pliable traction means (10), alternately one and the other Part of the width of the assume sluggish traction means (10) or seen in the direction of the longitudinal axis (LA) of the pliable traction means (10), occupy only part of the width of the pliable traction means (10) and are positioned in relation to the width of the flexible traction device centered on this. Elevator after Claim 10 or 11 , characterized in that the positive-locking elements are designed as truncated cones. 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 the current flowing through the holding magnet or the holding measures and controls the power supply then such that the currently flowing through the holding magnet or the current is within a predetermined bandwidth. Elevator after Claim 17 , characterized in that the electronics feeds the holding magnet or magnets via a device for pulse width modulation.

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