EP0857686B1 - Fahrtreppe - Google Patents
Fahrtreppe Download PDFInfo
- Publication number
- EP0857686B1 EP0857686B1 EP97122563A EP97122563A EP0857686B1 EP 0857686 B1 EP0857686 B1 EP 0857686B1 EP 97122563 A EP97122563 A EP 97122563A EP 97122563 A EP97122563 A EP 97122563A EP 0857686 B1 EP0857686 B1 EP 0857686B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brake
- escalator
- escalator according
- stentering
- gear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000003746 feather Anatomy 0.000 claims 1
- 230000002860 competitive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B29/00—Safety devices of escalators or moving walkways
Definitions
- the invention relates to an escalator according to the preamble of claim 1.
- auxiliary brake function has already been proposed via a motor built and supplied by the motor electronics To implement motor current or eddy current brakes.
- this realization meets concerns about the Reliability, because if the engine electronics fail, that is Realization of such an additional brake function in question posed.
- Exhaust brakes are more economical and reliable Spring force conditional - perform a braking function. Only by Applying pressure to the brake cylinder will reduce the braking effect reduced or canceled.
- a brake is in DE 32 12 826 A.
- At least two opposite one another Brake shoes act on a brake drum arranged between them on.
- a rod acts when a force generator is activated lifting one brake shoe from the drum and one Cylinder acting in the opposite direction, lifting off the opposite brake shoe.
- the braking effect of an exhaust brake is quite abrupt, however, so it's for braking for example, an escalator is not suitable because there is a risk that the people using the escalator could fall.
- the braking effect of the springs is also the case with exhaust brakes not sufficient to brake an escalator safely.
- the invention is based on the object To create escalator according to the preamble of claim 1 despite ensuring the auxiliary brake function even in unfavorable Operating conditions and with high delivery heights more competitive is.
- the measures according to the invention result in surprising Advantages compared to the previously proposed and known solutions:
- Through the The integration of the service brake with the additional brake is the special one Manufacture of actuators unnecessary for the additional brake.
- Still security improved because there is an independence from the power supply to the engine electronics.
- the Combined service and additional brake on the motor shaft for realize the stage drive chain so that the maximum safety function is guaranteed.
- the reduction in the braking force in the event of a brake shoe failure is only a quarter of the total braking torque provided. Accordingly, even if one brake shoe fails, 75 percent of the nominal braking torque is still available, which means that the escalator allows a single drive even at a head of 10 meters, for example. This in turn is considerably cheaper than a multiple drive, which contributes to the competitive manufacture of the escalator.
- the braking distance is also common Control of service and additional brakes on the escalator designed for the prescribed braking distances.
- This Adjustment can be made with those provided according to the invention meter four brake shoes very precisely, so that one too abrupt or braking the escalator too slowly when triggered the auxiliary brake function can be safely avoided.
- a delivery head e.g. 10 meters the difference in braking distance between the unloaded and the loaded escalator between 0.3 and about 1 Hold meter so that even if one brake shoe fails Braking distance also remains in the range of about 2 meters, so essentially a braking function can be implemented without that the feared escalator acceleration could occur.
- two opposing brake shoes form a brake assembly of a common tensioning element assigned. This ensures that one for Both brake shoes have uniform braking force, which is what even wear of the brake pads benefits, so that not due to one-sided wear and tear on the maintenance intervals need to be shortened.
- these clamping elements are each assigned to a dual-circuit braking system, so that there are four independent brake circuits, their Triggering each purely mechanically and therefore with increased security can be done. Independent sensors can ensure be that the brakes are released when the Speed a threshold of, for example, that 1.2 times the nominal speed.
- a trigger sensor can be provided with which the Braking device is triggered when the escalator steps, the pallets or the drive chain, also known as the belt can change the specified direction of travel.
- the dual circuit brake according to the invention can accordingly both as a service brake and as an additional brake in one use uniform design, it being understood that also multiple designs and multiple uses the braking device according to the invention is possible.
- the invention can also be produced particularly inexpensively Braking device used on escalators and moving walks be due to heavy pedestrian traffic as so-called traffic escalators or moving walks use even when the head is less than 6 meters make it appear advisable from additional brakes.
- a braking device 10 shown in FIG. 1 has one Double shoe brake 12 and can be used as an additional brake can also be used as a service brake.
- the braking device 10 has two brake arrangements 14, 16 for this purpose one behind the other or in the drawing according to FIG. 1 are arranged.
- Both double shoe brakes 12 enclose one Brake disc or brake drum, not shown in Fig. 1 is and firmly with the output gear of the escalator drive connected is. Extend in a manner known per se the brake assemblies 14 to 16 symmetrical about an axis 18 of the output gear of the escalator.
- a total of four brake shoes 20, 22, 24 and 26 are thus symmetrical arranged to each other, two brake shoes 22 and 26 or 20 and 24 face each other and two brake shoes 20 and 22 or 24 and 26 arranged one behind the other are.
- the brake shoes 20 and 22 are on a common pivot axis 28 stored, which is firmly connected to the frame of the escalator is. Furthermore, the brake shoes 24 and 26 are on one Pivot axis 30 mounted, which is also fixed to the frame the escalator is connected.
- the two brake shoes 22 and 26 are actuated via a common clamping element 32, while the brake shoes 20 and 24 via a common clamping element 34 can be operated. Both clamping elements 32 and 34 are accordingly arranged one behind the other and act in a way known per se Way via tie rods 36 on actuating levers, of which 1 two actuating levers 38, 40 are shown.
- the braking device shown in Fig. 1 forms an outer shoe brake, so that by operating the tie rod 36 Brake shoes 26 are moved towards each other and a braking torque Introduce into the drive train of the escalator.
- a symmetrical arrangement creates one Uniform braking effect both with upward and at Downward movement of the escalator, so that even wear of the brake pads that are on the inside of the brake shoes 20 to 26 are expected.
- the braking device according to the invention in the present Connection is described with reference to escalators, it is understood that they can be used equally on moving walks is.
- the distance is the pivot axes 28 and 30 slightly less than the distance of the Tie rod 36 of the brake shoe 22 from the tie rod of the brake shoe 26, which is not shown in Fig. 1.
- this measure becomes a symmetrical movement in a manner known per se ensured about the pivot axes 28 and 30.
- Each brake shoe 20, 22, 24 and 26 has a biasing spring arrangement 42 and 44 on adjustment devices 46 and 48 are led.
- the adjusting device 46 and 48 is at each end countered.
- adjusting devices 46, 48 can also Readjust braking device 10 if the brake pad is Brake shoes 20 to 26 is slightly worn over the entire Lifespan of the brake pads is equally quick and good To ensure response of the braking device according to the invention.
- Both tensioning elements 34, 36 are connected to separate brake circuits, so that there is a real dual-circuit braking system.
- the function the braking device 10 according to the invention as an additional brake Clamps or other failures of a brake shoe are not yet closed results in a loss of braking power of 50 percent. Much more the braking torque applied is only reduced by 25 percent, so that even with an escalator height of 10 meters a deceleration corresponding to the requirements ensured is.
- the increase in braking distance is a function of Step weight and depending on the applied Braking torque graphically represented as a parameter for a family of curves, being an escalator with a head of 10 meters is the basis.
- the respective braking distance is in Fig. 2 based on different braking torques.
- a braking torque of 165 Nm results in the curve 66, with the normalized step weight and the normalized braking distance is plotted on the ordinate.
- Based the escalator explained above results in a minimum braking distance of 0.2 meters, which at 0.36 meters at full Load increases.
- This nominal braking torque of 165 Nm may also be used at the same time Additional and service brake actuation not exceeded to the required minimum braking distance of Not to fall below 0.2 meters. Accordingly, it can Nominal braking torque of a braking device as an additional brake according to of the curve 68 amount to 83 Nm, whereby when the escalator is unloaded a braking distance of 0.3 meters and at the loaded Escalator gives a braking distance of 1.0 meters.
- curve 70 Even if two of the four brake shoes fail and only either the auxiliary brake or the service brake is actuated 2, curve 70 still results, provided that an escalator with a head of 10.0 meters is used.
- This braking situation with a braking torque of 62 Nm increases the braking distance to 0.36 meters with unloaded escalator and 2.3 meters with loaded Escalator. This braking distance is also still sufficient, after requesting that the escalator be noticeable must come to a standstill.
- the maximum mass filling of the escalator is calculated based on a weight load of 120 kg each Step.
Landscapes
- Escalators And Moving Walkways (AREA)
- Braking Arrangements (AREA)
Description
- Fig. 1
- eine schematische Ansicht einer erfindungsgemäßen Bremsvorrichtung; und
- Fig. 2
- den normierten Bremsweg, aufgetragen über dem normierten Stufengewicht für eine Fahrtreppe mit einer Förderhöhe von 10 Metern und beim Einsatz der erfindungsgemäßen Bremsvorrichtung.
| Maximales Bremsmoment gemäß konstruktiver Auslegung | 300 Nm |
| Rest-Bremsmoment nach Ausfall einer Bremsbacke | 225 Nm |
| Bremsscheibendurchmesser | 250 mm |
| Backenbreite | 40 mm |
| Bremsbelag | 40 x 230 mm2/Bremsbacke |
| Betriebs-Reibungszahl | µ = 0,41 |
| Spezifischer Verschleiß | v = 0,20 qcm/kWh |
| Bremsleistung | 4 x 60 Watt |
| Lagerbelastung | symmetrisch |
| Stufenbreite | 1 m |
| Förderhöhe | 10,0 m |
| Fahrtreppenwinkel | α = 30° |
| Nenngeschwindigkeit | v = 0,50 m/s |
| Stufenanzahl | 121 Stück |
| Trägheitsmoment | 0,68 kg * m2 |
| Reibungsmoment der gesamten Fahrtreppe | 23,5 Nm |
| Stufengewicht (leer), einschließlich des relevanten Gewichts des Antriebsstrangs | 3061 kg |
| Maximale Last-Masse | 5926 kg |
| Nenndrehzahl | 1500 1/min |
| Maximaler Bremsweg | 1 m |
| Minimaler Bremsweg | 0,2 m |
Claims (17)
- Fahrtreppe mit einer Bremsvorrichtung, die auf den Antriebsstrang der Fahrtreppe wirkt und eine Zusatzbremsfunktion bietet, dadurch gekennzeichnet, daß die Bremsvorrichtung (10) eine Doppelbackenbremse (12) mit vier Bremsbacken (20, 22; 24, 26) und vier Bremskreise aufweist, wodurch die Bremsvorrichtung (10) zusätzlich als Betriebsbremse einsetzbar ist.
- Fahrtreppe nach Anspruch 1, dadurch gekennzeichnet, daß Spannelemente (32, 34) für die Betätigung der Bremsvorrichtung (10) je an einen separaten Bremskreis angeschlossen sind.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsvorrichtung (10) zusätzlich als Betriebsbremse einsetzbar ist.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsvorrichtung (10) für alle erforderlichen Bremswege ausgelegt ist.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsvorrichtung als Außenbackenbremse ausgebildet ist und je zwei zueinander symmetrisch ausgebildete Bremsbacken (20, 22; 24, 26) aufweist, die mit getrennten Spannelementen (32, 34) betätigbar sind.
- Fahrtreppe nach Anspruch 5, dadurch gekennzeichnet, daß das Spannelement (32, 34) ein Bremsmagnet ist, der bei der Betätigung zwei einander gegenüberliegende Bremsanker (36) aufeinander zu bewegt.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsvorrichtung (10) zwei in axialer Richtung hintereinander angeordnete Bremsanordnungen (14, 16) aufweist, die je zwei zueinander symmetrische Bremsbacken (20, 22; 24, 26) und voneinander getrennte Spannelemente (32, 34) umfassen.
- Fahrtreppe nach Anspruch 7, dadurch gekennzeichnet, daß die Bremsanordnungen (14, 16) und zueinander symmetrisch sind.
- Fahrtreppe nach Anspruch 7, dadurch gekennzeichnet, daß die hintereinander liegenden Bremsbacken (20, 22, 24, 26) der beiden Bremsanordnungen (14, 16) auf einer gemeinsamen Schwenkachse (28, 30) gelagert sind.
- Fahrtreppe nach Anspruch 9, dadurch gekennzeichnet, daß jede Bremsanordnung (14, 16) an getrennten Bremskreisen angeschlossen ist.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Spannelemente (32, 34) der Bremsanordnungen (14, 16) in an sich bekannter Weise den Schwenkachsen (28, 30) gegenüberliegen und daß für jede Bremsbacke (20, 22; 24, 26) einer Bremsanordnung (14, 16) eine eigene Schwenkachse (30, 28) eingesetzt ist, die voneinander um einen Abstand beabstandet sind.
- Fahrtreppe nach Anspruch 11, dadurch gekennzeichnet, daß der Abstand etwas geringer als die Erstreckung des Spannelements (32, 34) in seiner Betätigungsrichtung ist.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß den Schwenkachsen (28, 30) der Bremsbacken (20, 22; 24 ,26) gegenüberliegende Vorspannfedern (42, 44), vorgesehen sind.
- Fahrtreppe nach Anspruch 13, dadurch gekennzeichnet, daß je eine Vorspannfeder für je eine Bremsbacke (20, 22, 24, 26), vorgesehen ist.
- Fahrtreppe nach Anspruch 13, dadurch gekennzeichnet, daß die Vorspannfeder Einstellvorrichtungen (46, 48) für die Einstellung des Betätigungswegs des Spannelements (32, 34) aufweisen.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Einstellvorrichtung (46, 48) für die Einstellung des Betätigungswegs des Spannelements (32, 34) zugleich als Nachstellvorrichtung für ein Nachstellen der Bremsvorrichtung beim Verschleiß des Bremsbelags ausgebildet ist.
- Fahrtreppe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Bremsvorrichtung (10) so ausgelegt ist, daß sich auch bei Ausfall von einer von vier Bremsbacken (20, 22; 24, 26) eine merkliche Bremsverzögerung ergibt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29702130U DE29702130U1 (de) | 1997-02-07 | 1997-02-07 | Fahrtreppe |
| DE29702130U | 1997-02-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0857686A1 EP0857686A1 (de) | 1998-08-12 |
| EP0857686B1 true EP0857686B1 (de) | 2003-11-05 |
Family
ID=8035633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97122563A Expired - Lifetime EP0857686B1 (de) | 1997-02-07 | 1997-12-19 | Fahrtreppe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0857686B1 (de) |
| AT (1) | ATE253526T1 (de) |
| DE (2) | DE29702130U1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29702130U1 (de) * | 1997-02-07 | 1997-03-20 | Thyssen Aufzüge GmbH, 73765 Neuhausen | Fahrtreppe |
| DE29801097U1 (de) * | 1998-01-23 | 1998-03-05 | Thyssen Aufzüge GmbH, 73765 Neuhausen | Fahrtreppe mit Betriebsbremse |
| DE19803433A1 (de) * | 1998-01-29 | 1999-08-05 | Militzer Otto Michael Dr Ing | Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3212826A1 (de) * | 1982-04-06 | 1983-10-13 | Deilmann-Haniel GmbH, 4600 Dortmund | Bremsvorrichtung fuer foerdermaschinen, haspel und widen |
| US4696377A (en) * | 1985-09-27 | 1987-09-29 | Ltv Energy Products Company | Brake system for drawworks |
| DE29702130U1 (de) * | 1997-02-07 | 1997-03-20 | Thyssen Aufzüge GmbH, 73765 Neuhausen | Fahrtreppe |
-
1997
- 1997-02-07 DE DE29702130U patent/DE29702130U1/de not_active Expired - Lifetime
- 1997-12-19 AT AT97122563T patent/ATE253526T1/de not_active IP Right Cessation
- 1997-12-19 DE DE59710957T patent/DE59710957D1/de not_active Expired - Lifetime
- 1997-12-19 EP EP97122563A patent/EP0857686B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59710957D1 (de) | 2003-12-11 |
| ATE253526T1 (de) | 2003-11-15 |
| EP0857686A1 (de) | 1998-08-12 |
| DE29702130U1 (de) | 1997-03-20 |
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