EP1802548B1 - Flat belt driven elevator - Google Patents

Flat belt driven elevator Download PDF

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Publication number
EP1802548B1
EP1802548B1 EP05791414.5A EP05791414A EP1802548B1 EP 1802548 B1 EP1802548 B1 EP 1802548B1 EP 05791414 A EP05791414 A EP 05791414A EP 1802548 B1 EP1802548 B1 EP 1802548B1
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EP
European Patent Office
Prior art keywords
belt
pulley
guide
flat belt
guide groove
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.)
Not-in-force
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EP05791414.5A
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German (de)
French (fr)
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EP1802548A1 (en
Inventor
Ernst Ach
Martin Rogger
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Inventio AG
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Inventio AG
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Priority to EP05791414.5A priority Critical patent/EP1802548B1/en
Publication of EP1802548A1 publication Critical patent/EP1802548A1/en
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Publication of EP1802548B1 publication Critical patent/EP1802548B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B7/00—Other common features of elevators
    • B66B7/06—Arrangements of ropes or cables
    • B66B7/062—Belts
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/22—Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2087—Jackets or coverings being of the coated type
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2007—Elevators

Definitions

  • the invention relates to an elevator in which flat belts are used as support means for carrying and driving an elevator car. It refers to the problem of flat belts on pulleys, d. H. to lead to drive and deflection of a lift system.
  • Out EP 1396458 A is a flat belt with longitudinal ribs on the traction side and / or on the back known.
  • Out AU 246 87 71 A is a load element consisting of several Ceifrigern which are covered with elastomeric material known.
  • US 6,401,871 is a support means for a lift known, which has the shape of a flat belt with a rectangular cross-section and the belt body consists of an elastic material and contains a plurality of parallel to its longitudinal direction embedded tensile cords.
  • two different means are proposed. According to a first proposal, the belt running surfaces of the flat belt as well as the pulley surfaces of the pulleys are provided with complementary contours. These contours ensure guidance of the flat belt on the pulleys.
  • the flat belts are guided by disc-shaped guide elements which project beyond the pulley running surfaces at the edge of a pulley or between a plurality of pulley surfaces of a pulley.
  • a belt guide with contoured running surfaces also increases traction between a traction sheave and the flat belt.
  • This solution has the disadvantage that due to the increased traction capability there is a safety risk that in a situation in which the elevator car or the counterweight rests on their lower travel limits, the traction between the traction sheave and the flat belt remains so high that the elevator car or the Counterweight can be moved further up.
  • the present invention has for its object to provide a lift with flat belt as a support means, which does not have the disadvantages mentioned, d. H. to provide an elevator in which the flat belts can be safely and wear-resistant on the drive and deflection of the elevator system without elaborate and expensive management measures, such as crowned or double-conical disc running surfaces are required.
  • this object is achieved in that in an elevator, the at least one pulley and at least one flat belt for carrying and moving an elevator car and the flat belt wraps around a portion of the circumference of the pulley, the flat belt has at least one guide groove in the region of a first belt running surface, and the pulley is provided with at least one guide rib projecting from its disk running surface extending in the circumferential direction of the disk running surface; Guide rib and the guide groove in the direction of the axis of the pulley clearance is present.
  • the advantages achieved by the invention are essentially to be seen in the fact that the laterally directed guide forces which occur between the guide groove of the flat belt and the guide rib of the belt pulley do not act on it in the edge region of the flat belt, as in the aforementioned belt guide with disk-shaped drives acting on the belt edge guide elements.
  • the above-described problem of the belt edge rising at the disc-shaped guide elements is eliminated in the solution according to the invention.
  • an increase in the maximum traction force due to traction-increasing guide contours on the traction sheave and the flat belt is avoided.
  • a secure guidance of the flat belt is achieved with simple and cost-saving means.
  • An undesirable increase in traction force transferable between a traction sheave and the flat belt is avoided by providing, when the first belt surface of the flat belt rests on the disk running surface and the guide rib engages the guide groove, between the guide rib and the guide groove in the direction of the axis of the pulley play ( Axial play S a ) is present.
  • the guide rib of the pulley is 0.1 mm to 2 mm narrower than the guide groove of the flat belt, so that the axial play S a between the guide rib and the guide groove is 0.1 mm to 3 mm. This ensures that on the one hand the guide causes no increase in traction and on the other hand, the possible transverse displacement of the flat belt on the pulley remains relatively low.
  • the axial clearance S a between the guide rib and the guide groove in dependence on the width of the flat belt, wherein the axial clearance S a should preferably be 0.5% to 10% of the width of the flat belt.
  • the depth of the guide groove and the height of the guide rib so to match one another between the two in the radial direction play (radial play S r ), when the first belt running surface of the flat belt rests on the disc running surface of the pulley.
  • the guide groove as well as the complementary shaped guide rib on a trapezoidal or a triangular or a circular section-shaped cross-section are simple and accurate to produce and are ideal for transferring occurring between flat belt and pulley shear forces.
  • a belt guide comprising a guide groove and a guide rib with trapezoidal or triangular cross-section, when the angle ⁇ between the flanks of the guide groove or the guide rib in the range between 0 ° and 120 °, preferably between 10 ° and 60 ° is.
  • a belt guide which is particularly resilient and wear-resistant in the transverse direction of the belt is achieved in that the surface of at least one guide groove of the flat belt is provided with a fabric reinforcement and / or with a friction-reducing and / or wear-resistant coating.
  • An advantageous embodiment of the invention is that the elastic material of the belt body of the flat belt, a friction coefficient reducing additive is attached.
  • This is the usually high coefficient of friction between reduces the elastic material of the belt body and the disc running surface of the pulley, so that the burden of the guide groove of the flat belt by the lateral forces required for its leadership are lower, which makes the guide functionally reliable and low-wear.
  • additives of polyethylene or cotton fibers are suitable for reducing said coefficient of friction.
  • An embodiment of the invention which is expedient for ensuring the operational safety of the elevator consists in that the elevator comprises a plurality of parallel arranged, provided with guide grooves flat belt as a support means and the pulley has a plurality of juxtaposed disc running surfaces, each of the disc running surfaces is provided with at least one guide rib.
  • a minimal reduction in the load capacity of a flat belt designed according to the invention with a guide groove is achieved in that the arrangement of the tension cords in the belt body is selected such that they are spaced farther apart in the region of a guide groove than outside such a region. It is therefore dispensed with a uniform distribution of the tension members to to be able to embed as many of them as possible in the belt body.
  • a particularly versatile embodiment of the invention is that the flat belt has a spine guide rib protruding from a (rear) second belt running surface.
  • This spine guide rib may cooperate with a guide groove in the disc running surface of a deflecting pulley which rotates the flat belt so as to contact the deflecting pulley with its second belt running surface.
  • This embodiment makes it possible to realize support means arrangements with guided flat belts, in which the flat belts are guided over a plurality of pulleys so that they are thereby curved in opposite directions.
  • Fig. 1 schematically shows a section through an elevator according to the invention.
  • Reference numeral 1 designates an elevator shaft in which a prime mover 2 with a drive pulley 7A moves an elevator car 4 up and down via a support means in the form of a flat belt 3.
  • the engine 2 is arranged in the upper part of the hoistway 1 and supported on a car guide rail 5 and two counterweight guide rails 10.
  • the elevator car 4 is guided on car guide rails 5 fixed in the elevator shaft 1.
  • cabin pulleys 7 B are mounted on both sides, via which the carrying forces are transmitted from the flat belt 3 to the elevator car 4.
  • a counterweight 8 is arranged, which is guided on counterweight guide rails 10 and suspended by means of a counterweight pulley 7 C on the same flat belt 3 as the elevator car 4.
  • the plane of the drive pulley 7A is arranged at right angles to the counterweight-side cabin wall 4.1 and lies approximately in the middle of the cabin depth.
  • the flat belt 3 serving as the support means is fixed at one of its ends below the drive pulley 7A. From this first suspension point 9, it extends down to the counterweight pulley 7C, wraps around it, extends from this to the drive pulley 7A, wraps around this and then runs along the counterweight-side cabin wall 4.1 downwards, wraps around each on both sides of the elevator car 4 mounted below the elevator car cabin pulley 7B by 90 ° and extends along the Counterweight 8 remote cabin wall 4.2 up to a second support means fixed point 11th
  • the support means arrangement described causes each opposite vertical movements of the elevator car 4 and the counterweight 8, wherein the speed of which corresponds to half the peripheral speed of the drive pulley 7A.
  • the flat belt 3 undergoes bends in a certain direction of curvature when the counterweight pulley 7C and the drive pulley 7A are wound, while being bent in the opposite direction of curvature when the car pulleys 7B are wound around.
  • the flat belt 3 has at least one guide groove extending in its longitudinal direction, while the pulleys 7 are provided with guide ribs which engage in the at least one guide engage the flat belt 3.
  • the flat belt 3 is centered on the disc running surfaces of the pulleys 7, even if the pulleys are not perfectly aligned with each other.
  • the at least one guide groove of the flat belt as well as the at least one guide rib of the pulleys are described in detail below with reference to further drawings.
  • Fig. 2 shows a flat belt 23 resting on a pulley 27.
  • the flat belt comprises a belt body 23.1 with a first belt running surface 23.5, a back reinforcing layer 23.3 and a plurality of tension cords 23.2 embedded in the belt body.
  • the belt body 23.1 consists of an elastic and wear-resistant material, preferably of an elastic plastic, such as polyurethane (PU) or ethylene-propylene-diene rubber (EPDM).
  • PU polyurethane
  • EPDM ethylene-propylene-diene rubber
  • the elastic material of the belt body 23.1 can be supplemented with an additive which reduces the coefficient of friction with respect to the pulley, for example silicone, polyethylene or cotton fibers.
  • the back reinforcing layer 23.3 may be a fabric made of cotton or plastic fibers or may consist of a film, for example a polyamide film. It protects the belt body 3.1 from mechanical damage.
  • the pulley 7, which may have the function of a drive pulley (pulley) or a Umlenkriemenin in the elevator, is usually made of steel, gray cast iron or ductile iron, but may also consist of a plastic, such as polyamide. In the interest of optimum utilization of the available manhole space and the lowest possible torque required on the engine 2, the pulleys may have a diameter D of less than 100 mm.
  • the pulley 27 is provided with a guide rib 27.2, which engages in an existing in the flat belt 23 guide 23.4.
  • the guide rib 27.2 of the pulley 7, as well as the guide 23.4 of the flat belt 23 trapezoidal, substantially complementary to each other formed cross-sections.
  • sufficient clearance in the axial and radial directions is present to ensure that no V-belt effect occurs, so that when the pulley is used as a traction sheave, the intended traction force is exceeded in any situation. This avoids the risk that, in the event of a control or drive span, if the elevator car or counterweight rests on its lower travel limits, the tractive force between the traction sheave and the flat belt remains high enough to further move the elevator car or counterweight upwards.
  • Umlenkriemenusionn pulleys is ensured by the said game that no V-belt effect occurs, are excited by the vibrations in the flat belt.
  • V-belt effect Under V-belt effect are clamping effects between a keyway of a V-belt pulley and a running in the keyway V-belt to understand. These clamping effects lead on the one hand to an increase in the normal forces occurring between the keyway and the V-belt and thus the achievable traction force. On the other hand, they can excite vibrations in the expiring Keilriementrum when taking out the V-belt from the keyway of the V-belt pulley.
  • Fig. 3 again shows a with its first belt surface 33.5 resting on a pulley 37 flat belt 33.
  • the flat belt 33 has two guide grooves 33.4, wherein one of two guide ribs 37.2 of the pulley 37 engages in each of the guide grooves.
  • the required to avoid the lateral Wegdriftens the flat belt 33 guide force is thus distributed to two edges of the two guide grooves 33.4, which significantly increases the reliability and wear resistance of the belt guide.
  • Fig. 4 shows a flat belt 43, the pulley 47 - for example, the in Fig. 1 shown car pulley 7B - so wraps around that it touches its disc running surface 47.1 with its second belt running surface 43.6 - also called the belt back.
  • the flat belt 43 is provided - in addition to a guide groove 43.4 in its first belt running surface 43.5 - with a rear guide rib 43.8 projecting from its (rear) second belt running surface 43.6, which cooperates with a disk guide groove 47.4 of the belt pulley 47 present in the wheel running surface 47.1.
  • the back reinforcing layer 43.3 can be used as wear protection for the back guide rib 43.8 Act. However, such a back reinforcing layer is not mandatory.
  • the Fig. 4 illustrated embodiment makes it possible to realize Tragstoffanssenen in elevator systems with guided flat belts, in which the flat belts rotate around a plurality of pulleys, which are arranged so that the flat belts are curved in opposite directions.
  • Fig. 5-8 show in enlarged views details of differently shaped and formed guide grooves and guide ribs of flat belts and with these cooperating pulleys.
  • FIG. 5 shows enlarged a guide rib 57.2 of a pulley 57 and the corresponding guide groove 53.4 of a flat belt 53, the execution and the arrangement of these elements substantially corresponding to the corresponding elements FIGS. 2 and 3 correspond. It can be seen that, when the first belt running surface 53.5 of the flat belt rests on the disk running surface 57.1, between the guide rib 57.2 and the guide groove 53.4 axial play S a as well as radial clearance S r is present, as explained above, a traction increase by a V-belt effect to avoid.
  • the axial play S a measured in the direction of the pulley axis amounts to 0.1 mm to 3 mm or 0.5% to 10% of the width of the flat belt.
  • the flanks 57.3 of the guide rib 57.2 are the flanks 57.3 of the guide rib 57.2, as well as the flank 53.7 the guide groove 53.4 preferably inclined towards each other, so that in the case of a guide groove or a guide rib with trapezoidal or triangular ( Fig. 7 ) Cross-section of the angle ⁇ between the flanks of the guide groove or the guide rib in the range between 0 ° and 120 °, preferably between 10 ° and 60 °.
  • Fig. 6 also shows a guide rib 67.2 of a pulley 67 and a corresponding guide groove 63.4 of the flat belt 63 which have trapezoidal cross-sections, wherein the surface of the guide groove 63.4 of the flat belt is provided with a friction and / or wear-reducing protective layer 63.9.
  • the protective layer 63.9 may be present for example in the form of a fabric reinforcement or a plastic film.
  • Fig. 7 shows an advantageous embodiment of acting between a flat belt 73 and a pulley 77 belt guide.
  • the pulley 77 has a triangular guide rib 7.2, which engages in a triangular guide groove 73.4 of the flat belt 73.
  • This belt guide takes up little space in the direction of the width of the flat belt and therefore allows for the largest possible number of tension strands 73.2 embedded in the belt body side by side.
  • Fig. 8 shows another possible embodiment of acting between a pulley 87 and a flat belt 83 belt guide, in each of which at least one guide groove 83.4 in the flat belt 83 and a guide rib 87.2 on the pulley 87 are present, the circular section-shaped cross-sections.
  • Fig. 9 shows a pulley 97, resting on the two parallel flat belt 93 with guide grooves 93.4.1 and 93.4.2.
  • the pulley 97 comprises two juxtaposed disc running surfaces 97.1.1, 97.1.2, each of which is provided with a guide rib 97.2.1, 97.2.2.
  • each of the flat belts more than one guide groove and each disc running surface can have more than one guide rib.

Description

Die Erfindung betrifft einen Aufzug, bei dem zum Tragen und Antreiben einer Aufzugskabine Flachriemen als Tragmittel verwendet werden. Sie bezieht sich auf das Problem, Flachriemen auf Riemenscheiben, d. h. auf Treib- und Umlenkscheiben einer Aufzugsanlage zu führen.The invention relates to an elevator in which flat belts are used as support means for carrying and driving an elevator car. It refers to the problem of flat belts on pulleys, d. H. to lead to drive and deflection of a lift system.

Aus EP 1396458 A ist ein Flachriemen mit Längsrippen auf der Traktionsseite und/oder auf der Rückseite bekannt.Out EP 1396458 A is a flat belt with longitudinal ribs on the traction side and / or on the back known.

Aus AU 246 87 71 A ist ein Lastelement bestehend aus mehreren Zugfrigern, welche mit elastomeren Material bedeckt sind, bekannt.Out AU 246 87 71 A is a load element consisting of several Zugfrigern which are covered with elastomeric material known.

Aus US 6,401,871 ist ein Tragmittel für einen Aufzug bekannt, das die Form eines Flachriemens mit rechteckigem Querschnitt aufweist und dessen Riemenkörper aus einem elastischen Material besteht und mehrere parallel zu seiner Längsrichtung eingebettete Zugstränge enthält. Um den Flachriemen auf den als Treib- oder Umlenkscheiben verwendbaren Riemenscheiben zu führen, sind zwei unterschiedliche Mittel vorgeschlagen. Gemäss einem ersten Vorschlag sind die Riemenlaufflächen des Flachriemens wie auch die Scheibenlaufflächen der Riemenscheiben mit komplementären Konturen versehen. Diese Konturen gewährleisten eine Führung des Flachriemens auf den Riemenscheiben. Nach einem zweiten Vorschlag werden die Flachriemen durch scheibenförmige Führungselemente geführt, die am Rand einer Riemenscheibe bzw. zwischen mehreren Scheibenlaufflächen einer Riemenscheibe über die Scheibenlaufflächen hinausragen.Out US 6,401,871 is a support means for a lift known, which has the shape of a flat belt with a rectangular cross-section and the belt body consists of an elastic material and contains a plurality of parallel to its longitudinal direction embedded tensile cords. In order to guide the flat belt on the usable as a driving or deflection pulleys, two different means are proposed. According to a first proposal, the belt running surfaces of the flat belt as well as the pulley surfaces of the pulleys are provided with complementary contours. These contours ensure guidance of the flat belt on the pulleys. According to a second proposal, the flat belts are guided by disc-shaped guide elements which project beyond the pulley running surfaces at the edge of a pulley or between a plurality of pulley surfaces of a pulley.

Die in US 6,401,871 vorgeschlagenen Methoden zur Führung der Flachriemen weisen erhebliche Nachteile auf.In the US 6,401,871 proposed methods for guiding the flat belt have significant disadvantages.

Wie im genannten Dokument beschrieben, wird beim ersten Vorschlag einer Riemenführung mit konturierten Laufflächen auch die Traktionsfähigkeit zwischen einer Treibscheibe und dem Flachriemen erhöht. Diese Lösung hat den Nachteil, dass infolge der erhöhten Traktionsfähigkeit das Sicherheitsrisiko besteht, dass in einer Situation, in der die Aufzugskabine oder das Gegengewicht auf ihren unteren Wegbegrenzungen aufliegt, die Traktionskraft zwischen der Treibscheibe und dem Flachriemen so hoch bleibt, dass die Aufzugskabine oder das Gegengewicht weiter aufwärts bewegt werden können.As described in the cited document, in the first proposal, a belt guide with contoured running surfaces also increases traction between a traction sheave and the flat belt. This solution has the disadvantage that due to the increased traction capability there is a safety risk that in a situation in which the elevator car or the counterweight rests on their lower travel limits, the traction between the traction sheave and the flat belt remains so high that the elevator car or the Counterweight can be moved further up.

Die Führung des Flachriemens mittels scheibenförmigen Führungselementen hat sich ebenso als nachteilig erwiesen. Wenn der Rand des Flachriemens mit einer gewissen Anpresskraft gegen diese mit der Riemenscheibe umlaufenden Führungselemente gedrückt wird, wird der Flachriemen seitlich durch letztere angehoben, so dass die Seitenfläche des Riemens am Führungselement radial hochsteigt und kaum weiteren Widerstand gegen das Verschieben des Flachriemens leisten kann. Als Folge davon können Flachriemen von der Riemenscheibe fallen oder vorzeitig zerstört werden.The leadership of the flat belt by means of disc-shaped guide elements has also proved to be disadvantageous. When the edge of the flat belt is pressed against these pulley-rotating guide members with a certain pressing force, the flat belt is laterally lifted by the latter, so that the side surface of the belt rises radially on the guide member and can scarcely resist the sliding of the flat belt. As a result, flat belts may fall off the pulley or be prematurely destroyed.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen Aufzug mit Flachriemen als Tragmittel zu schaffen, der die genannten Nachteile nicht aufweist, d. h. einen Aufzug zu schaffen, bei dem die Flachriemen sicher und verschleissarm auf den Treib- und Umlenkscheiben der Aufzugsanlage geführt werden können, ohne dass aufwändige und teure Führungsmassnahmen, wie beispielsweise ballige oder doppelt-konische Scheibenlaufflächen, erforderlich sind.The present invention has for its object to provide a lift with flat belt as a support means, which does not have the disadvantages mentioned, d. H. to provide an elevator in which the flat belts can be safely and wear-resistant on the drive and deflection of the elevator system without elaborate and expensive management measures, such as crowned or double-conical disc running surfaces are required.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass bei einem Aufzug, der mindestens eine Riemenscheibe und mindestens einen Flachriemen zum Tragen und Bewegen einer Aufzugskabine umfasst, und der Flachriemen einen Teil des Umfangs der Riemenscheibe umschlingt, der Flachriemen im Bereich einer ersten Riemenlauffläche mindestens eine Führungsnut aufweist und die Riemenscheibe mit mindestens einer aus ihrer Scheibenlauffläche hervorstehenden Führungsrippe versehen ist, die sich in Umfangsrichtung der Scheibenlauffläche erstreckt, und dass zwischen der Führungsrippe und der Führungsnut in Richtung der Achse der Riemenscheibe spiel vorhanden ist.According to the invention this object is achieved in that in an elevator, the at least one pulley and at least one flat belt for carrying and moving an elevator car and the flat belt wraps around a portion of the circumference of the pulley, the flat belt has at least one guide groove in the region of a first belt running surface, and the pulley is provided with at least one guide rib projecting from its disk running surface extending in the circumferential direction of the disk running surface; Guide rib and the guide groove in the direction of the axis of the pulley clearance is present.

Die durch die Erfindung erreichten Vorteile sind im Wesentlichen darin zu sehen, dass die zwischen der Führungsnut des Flachriemens und der Führungsrippe der Riemenscheibe auftretenden, seitwärts gerichteten Führungskräfte nicht im Randbereich des Flachriemens auf diesen wirken, wie bei der erwähnten Riemenführung mit auf den Riemenrand wirkenden scheibenförmigen Führungselementen. Das vorstehend beschriebene Problem des an den scheibenförmigen Führungselementen hochsteigenden Riemenrands ist bei der erfindungsgemässen Lösung eliminiert. Ausserdem wird eine Erhöhung der maximalen Traktionskraft infolge von traktionserhöhenden Führungskonturen an der Treibscheibe und am Flachriemen vermieden. Überdies wird eine sichere Führung des Flachriemens mit einfachen und Kosten sparenden Mitteln erreicht.The advantages achieved by the invention are essentially to be seen in the fact that the laterally directed guide forces which occur between the guide groove of the flat belt and the guide rib of the belt pulley do not act on it in the edge region of the flat belt, as in the aforementioned belt guide with disk-shaped drives acting on the belt edge guide elements. The above-described problem of the belt edge rising at the disc-shaped guide elements is eliminated in the solution according to the invention. In addition, an increase in the maximum traction force due to traction-increasing guide contours on the traction sheave and the flat belt is avoided. Moreover, a secure guidance of the flat belt is achieved with simple and cost-saving means.

Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor und sind im Folgenden beschrieben:

  • Nach einer bevorzugten Ausführungsform der Erfindung umfasst der Flachriemen einen im Wesentlichen rechteckigen Riemenkörper aus elastischem Material, in welchen mehrere Zugstränge eingebettet sind. Dadurch wird dem Flachriemen die erforderliche Zugfestigkeit verliehen. Eine optimale Führung des Flachriemens auf der Riemenscheibe wird dadurch gewährleistet, dass der Querschnitt der Führungsrippe der Riemenscheibe im Wesentlichen komplementär zum Querschnitt der Führungsnut des Flachriemens ausgebildet ist.
Advantageous embodiments and further developments of the invention will become apparent from the subclaims and are described below:
  • According to a preferred embodiment of the invention, the flat belt comprises a substantially rectangular belt body of elastic material in which a plurality of tension cords are embedded. This gives the flat belt the required tensile strength. An optimal leadership of the flat belt on the pulley is ensured by the fact that the cross section of the guide rib of the pulley is formed substantially complementary to the cross section of the guide groove of the flat belt.

Eine unerwünschte Erhöhung der zwischen einer Treibscheibe und dem Flachriemen übertragbaren Traktionskraft wird dadurch vermieden, dass, wenn die erste Riemenlauffläche des Flachriemens auf der Scheibenlauffläche aufliegt und die Führungsrippe in die Führungsnut eingreift, zwischen der Führungsrippe und der Führungsnut in Richtung der Achse der Riemenscheibe Spiel (Axialspiel Sa) vorhanden ist.An undesirable increase in traction force transferable between a traction sheave and the flat belt is avoided by providing, when the first belt surface of the flat belt rests on the disk running surface and the guide rib engages the guide groove, between the guide rib and the guide groove in the direction of the axis of the pulley play ( Axial play S a ) is present.

Zweckmässigerweise ist die Führungsrippe der Riemenscheibe 0.1 mm bis 2 mm schmaler als die Führungsnut des Flachriemens, so dass das Axialspiel Sa zwischen der Führungsrippe und der Führungsnut 0.1 mm bis 3 mm beträgt. Damit ist gewährleistet, dass einerseits die Führung keine Erhöhung der Traktionskraft bewirkt und andererseits die mögliche Querverschiebung des Flachriemens auf der Riemenscheibe relativ gering bleibt.Conveniently, the guide rib of the pulley is 0.1 mm to 2 mm narrower than the guide groove of the flat belt, so that the axial play S a between the guide rib and the guide groove is 0.1 mm to 3 mm. This ensures that on the one hand the guide causes no increase in traction and on the other hand, the possible transverse displacement of the flat belt on the pulley remains relatively low.

Als vorteilhaft hat sich erwiesen, die Grösse des Axialspiels Sa zwischen der Führungsrippe und der Führungsnut in Abhängigkeit von der Breite des Flachriemens auszuführen, wobei das Axialspiel Sa vorzugsweise 0.5% bis 10% der Breite des Flachriemens betragen soll.It has proven to be advantageous to carry out the size of the axial clearance S a between the guide rib and the guide groove in dependence on the width of the flat belt, wherein the axial clearance S a should preferably be 0.5% to 10% of the width of the flat belt.

Um sicher zu vermeiden, dass sich der Flachriemen über den schmalen Bereich der Grundfläche seiner Führungsnut auf der Führungsrippe der Riemenscheibe abstützt ist es zweckmässig, die Tiefe der Führungsnut und die Höhe der Führungsrippe so aufeinander abzustimmen, dass zwischen den beiden in radialer Richtung Spiel (Radialspiel Sr) vorhanden ist, wenn die erste Riemenlauffläche des Flachriemens auf der Scheibenlauffläche der Riemenscheibe aufliegt.In order to reliably avoid that the flat belt is supported over the narrow area of the base of its guide groove on the guide rib of the pulley, it is expedient, the depth of the guide groove and the height of the guide rib so to match one another between the two in the radial direction play (radial play S r ), when the first belt running surface of the flat belt rests on the disc running surface of the pulley.

Gemäss besonders bevorzugten Ausführungsformen der Erfindung weist die Führungsnut wie auch die dazu komplementär geformte Führungsrippe einen trapezförmigen oder einen dreieckförmigen oder einen kreisabschnittförmigen Querschnitt auf. Führungsnuten und Führungsrippen mit diesen Querschnittsformen sind einfach und präzise herstellbar und eignen sich hervorragend zur Übertragung von zwischen Flachriemen und Riemenscheibe auftretenden Querkräften.According to particularly preferred embodiments of the invention, the guide groove as well as the complementary shaped guide rib on a trapezoidal or a triangular or a circular section-shaped cross-section. Guide grooves and guide ribs with these cross-sectional shapes are simple and accurate to produce and are ideal for transferring occurring between flat belt and pulley shear forces.

Ausreichende bis sehr gute Führungseigenschaften hat eine Riemenführung, die eine Führungsnut und eine Führungsrippe mit trapezförmigem oder dreieckförmigem Querschnitt umfasst, wenn der Winkel α zwischen den Flanken der Führungsnut bzw. der Führungsrippe im Bereich zwischen 0° und 120°, vorzugsweise zwischen 10° und 60° liegt.Sufficient to very good guiding properties has a belt guide comprising a guide groove and a guide rib with trapezoidal or triangular cross-section, when the angle α between the flanks of the guide groove or the guide rib in the range between 0 ° and 120 °, preferably between 10 ° and 60 ° is.

Eine in Querrichtung des Riemens besonders belastbare und verschleissarme Riemenführung wird dadurch erreicht, dass die Oberfläche mindestens einer Führungsnut des Flachriemens mit einer Gewebeverstärkung und/oder mit einer reibungsvermindernden und/oder verschleissresistenten Beschichtung versehen ist.A belt guide which is particularly resilient and wear-resistant in the transverse direction of the belt is achieved in that the surface of at least one guide groove of the flat belt is provided with a fabric reinforcement and / or with a friction-reducing and / or wear-resistant coating.

Eine vorteilhafte Ausgestaltung der Erfindung besteht darin, dass dem elastischen Material des Riemenkörpers des Flachriemens ein dessen Reibwert reduzierender Zusatz beigefügt wird. Damit wird der üblicherweise hohe Reibwert zwischen dem elastischen Material des Riemenkörpers und der Scheibenlauffläche der Riemenscheibe reduziert, so dass die Belastung der Führungsnut des Flachriemens durch die für dessen Führung erforderlichen Querkräfte geringer werden, was die Führung funktionssicherer und verschleissärmer macht. Zur Reduktion des genannten Reibwerts eignen sich beispielsweise Zusätze von Polyaethylen oder Baumwollfasern.An advantageous embodiment of the invention is that the elastic material of the belt body of the flat belt, a friction coefficient reducing additive is attached. This is the usually high coefficient of friction between reduces the elastic material of the belt body and the disc running surface of the pulley, so that the burden of the guide groove of the flat belt by the lateral forces required for its leadership are lower, which makes the guide functionally reliable and low-wear. For example, additives of polyethylene or cotton fibers are suitable for reducing said coefficient of friction.

Bei der Verwendung von relativ breiten Flachriemen kann es vorteilhaft sein, diese mit mehreren parallelen Führungsnuten herzustellen und die Riemenscheibe mit mehreren korrespondierenden Führungsrippen zu versehen. Dadurch werden die zur Führung des Flachriemens erforderlichen Querkräfte auf mehrere Führungsstellen verteilt, was wiederum eine Erhöhung der Funktionssicherheit und der Verschleissresistenz der Flachriemenführung zur Folge hat.When using relatively wide flat belts, it may be advantageous to produce them with several parallel guide grooves and to provide the pulley with a plurality of corresponding guide ribs. As a result, the lateral forces required for guiding the flat belt are distributed over a plurality of guide points, which in turn results in an increase in functional reliability and the wear resistance of the flat belt guide.

Eine für die Gewährleistung der Betriebssicherheit des Aufzugs zweckmässige Ausgestaltung der Erfindung besteht darin, dass der Aufzug mehrere parallel angeordnete, mit Führungsnuten versehene Flachriemen als Tragmittel umfasst und die Riemenscheibe mehrere nebeneinander angeordnete Scheibenlaufflächen aufweist, wobei jede der Scheibenlaufflächen mit mindestens einer Führungsrippe versehen ist.An embodiment of the invention which is expedient for ensuring the operational safety of the elevator consists in that the elevator comprises a plurality of parallel arranged, provided with guide grooves flat belt as a support means and the pulley has a plurality of juxtaposed disc running surfaces, each of the disc running surfaces is provided with at least one guide rib.

Eine minimale Reduktion der Belastbarkeit eines erfindungsgemäss mit einer Führungsnut ausgeführten Flachriemens wird dadurch erreicht, dass die Anordnung der Zugstränge im Riemenkörper so gewählt ist, dass diese im Bereich einer Führungsnut weiter voneinander beabstandet sind, als ausserhalb eines solchen Bereichs. Es wird also auf eine gleichmässige Verteilung der Zugträger verzichtet, um möglichst viele von ihnen im Riemenkörper einbetten zu können.A minimal reduction in the load capacity of a flat belt designed according to the invention with a guide groove is achieved in that the arrangement of the tension cords in the belt body is selected such that they are spaced farther apart in the region of a guide groove than outside such a region. It is therefore dispensed with a uniform distribution of the tension members to to be able to embed as many of them as possible in the belt body.

Eine besonders vielseitig anwendbare Ausführungsform der Erfindung besteht darin, dass der Flachriemen eine aus einer (rückseitigen) zweiten Riemenlauffläche hervorstehende Rückenführungsrippe aufweist. Diese Rückenführungsrippe kann mit einer Führungsnut in der Scheibenlauffläche einer Umlenkriemenscheibe zusammenwirken, welche der Flachriemen so umläuft, dass er die Umlenkriemenscheibe mit seiner zweiten Riemenlauffläche berührt. Diese Ausführungsform ermöglicht es, Tragmittelanordnungen mit geführten Flachriemen zu realisieren, bei welchen die Flachriemen so über mehrere Riemenscheiben geführt werden, dass sie dabei in entgegengesetzten Richtungen gekrümmt werden.A particularly versatile embodiment of the invention is that the flat belt has a spine guide rib protruding from a (rear) second belt running surface. This spine guide rib may cooperate with a guide groove in the disc running surface of a deflecting pulley which rotates the flat belt so as to contact the deflecting pulley with its second belt running surface. This embodiment makes it possible to realize support means arrangements with guided flat belts, in which the flat belts are guided over a plurality of pulleys so that they are thereby curved in opposite directions.

Ausführungsbeispiele der Erfindung sind im Folgenden anhand der beigefügten Zeichnungen erläutert.Embodiments of the invention are explained below with reference to the accompanying drawings.

Es zeigen:

Fig. 1
einen schematischen Querschnitt durch eine erfindungsgemässe Aufzugsanlage,
Fig. 2
einen Querschnitt durch einen auf einer Riemenscheibe mit einer Führungsrippe aufliegenden Flachriemen mit einer Führungsnut,
Fig. 3
einen Querschnitt durch einen auf einer Riemenscheibe mit zwei Führungsrippen aufliegenden Flachriemen mit zwei Führungsnuten,
Fig. 4
einen Querschnitt durch einen auf einer UmlenkRiemenscheibe aufliegenden Flachriemen mit einer Rückenführungsrippe,
Fig. 5-8
vergrösserte Ansichten von auf Riemescheiben aufliegenden Flachriemen mit unterschiedlich geformten und ausgebildeten Führungsnuten und Führungsrippen der korrespondierenden Riemenscheibe.
Fig. 9
eine Riemenscheibe mit mehreren Scheibenlaufflächen, auf denen mehrere Flachriemen aufliegen.
Show it:
Fig. 1
a schematic cross section through an elevator system according to the invention,
Fig. 2
a cross section through a resting on a pulley with a guide rib flat belt with a guide groove,
Fig. 3
a cross section through a lying on a pulley with two guide ribs flat belt with two grooves,
Fig. 4
a cross section through a resting on a Umlenkriemenscheibe flat belt with a spine guide rib,
Fig. 5-8
enlarged views of flat belts resting on belt discs with differently shaped and formed guide grooves and guide ribs of the corresponding belt pulley.
Fig. 9
a pulley with several disc running surfaces on which lie several flat belts.

Fig. 1 zeigt schematisch einen Schnitt durch einen erfindungsgemässen Aufzug. Mit dem Bezugszeichen 1 ist ein Aufzugsschacht gekennzeichnet, in dem eine Antriebsmaschine 2 mit einer Antriebs-Riemenscheibe 7A über ein Tragmittel in Form eines Flachriemens 3 eine Aufzugskabine 4 aufwärts und abwärts bewegt. Die Antriebsmaschine 2 ist im oberen Teil des Aufzugsschachts 1 angeordnet und auf einer Kabinenführungsschiene 5 und zwei Gegengewichtsführungsschienen 10 abgestützt. Die Aufzugskabine 4 ist an im Aufzugsschacht 1 fixierten Kabinenführungsschienen 5 geführt. Unterhalb des Kabinenbodens 6 sind auf beiden Seiten Kabinen-Riemenscheiben 7B angebracht, über welche die Tragkräfte vom Flachriemen 3 auf die Aufzugskabine 4 übertragen werden. Auf der linken Seite der Aufzugskabine 4 ist ein Gegengewicht 8 angeordnet, das an Gegengewichtsführungsschienen 10 geführt und mittels einer Gegengewichts-Riemenscheibe 7C am selben Flachriemen 3 wie die Aufzugskabine 4 aufgehängt ist. Fig. 1 schematically shows a section through an elevator according to the invention. Reference numeral 1 designates an elevator shaft in which a prime mover 2 with a drive pulley 7A moves an elevator car 4 up and down via a support means in the form of a flat belt 3. The engine 2 is arranged in the upper part of the hoistway 1 and supported on a car guide rail 5 and two counterweight guide rails 10. The elevator car 4 is guided on car guide rails 5 fixed in the elevator shaft 1. Below the cabin floor 6 cabin pulleys 7 B are mounted on both sides, via which the carrying forces are transmitted from the flat belt 3 to the elevator car 4. On the left side of the elevator car 4, a counterweight 8 is arranged, which is guided on counterweight guide rails 10 and suspended by means of a counterweight pulley 7 C on the same flat belt 3 as the elevator car 4.

Die Ebene der Antriebs-Riemenscheibe 7A ist rechtwinklig zur gegengewichtsseitigen Kabinenwand 4.1 angeordnet und liegt etwa in der Mitte der Kabinentiefe. Der als Tragmittel dienende Flachriemen 3 ist an einem seiner Enden unterhalb der Antriebs-Riemenscheibe 7A fixiert. Von diesem ersten Tragmittelfixpunkt 9 aus erstreckt er sich abwärts bis zu der Gegengewichts-Riemenscheibe 7C, umschlingt diese, erstreckt sich von dieser aus zu der Antriebs-Riemenscheibe 7A, umschlingt diese und verläuft anschliessend entlang der gegengewichtsseitigen Kabinenwand 4.1 abwärts, umschlingt auf beiden Seiten der Aufzugskabine 4 je eine unterhalb der Aufzugskabine angebrachte Kabinen-Riemenscheibe 7B um je 90° und verläuft entlang der dem Gegengewicht 8 abgewandten Kabinenwand 4.2 aufwärts zu einem zweiten Tragmittelfixpunkt 11.The plane of the drive pulley 7A is arranged at right angles to the counterweight-side cabin wall 4.1 and lies approximately in the middle of the cabin depth. The flat belt 3 serving as the support means is fixed at one of its ends below the drive pulley 7A. From this first suspension point 9, it extends down to the counterweight pulley 7C, wraps around it, extends from this to the drive pulley 7A, wraps around this and then runs along the counterweight-side cabin wall 4.1 downwards, wraps around each on both sides of the elevator car 4 mounted below the elevator car cabin pulley 7B by 90 ° and extends along the Counterweight 8 remote cabin wall 4.2 up to a second support means fixed point 11th

Die beschriebene Tragmittelanordnung bewirkt jeweils gegenläufige Vertikalbewegungen der Aufzugskabine 4 und des Gegengewichts 8, wobei deren Geschwindigkeit der halben Umfangsgeschwindigkeit der Antriebs-Riemenscheibe 7A entspricht.The support means arrangement described causes each opposite vertical movements of the elevator car 4 and the counterweight 8, wherein the speed of which corresponds to half the peripheral speed of the drive pulley 7A.

Der Flachriemen 3 erfährt bei der Umschlingung der Gegengewichts-Riemenscheibe 7C wie auch der Antriebs-Riemenscheibe 7A Biegungen in einer bestimmten Krümmungsrichtung, während er bei der Umschlingung der Kabinen-Riemenscheiben 7B in entgegengesetzter Krümmungsrichtung gebogen wird.The flat belt 3 undergoes bends in a certain direction of curvature when the counterweight pulley 7C and the drive pulley 7A are wound, while being bent in the opposite direction of curvature when the car pulleys 7B are wound around.

Im Interesse der Einfachheit wird im Folgenden auf die Unterscheidung zwischen Antriebs-, Kabinen- und Gegengewichts-Riemenscheiben 7A, 7B, 7C verzichtet und nur noch die Bezeichnung Riemenscheiben 7 verwendet.In the interests of simplicity, the distinction between drive, cabin and counterweight pulleys 7A, 7B, 7C will be omitted below, and only the term pulleys 7 will be used.

Um zu gewährleisten, dass der als Tragmittel dienende Flachriemen 3 stets korrekt auf den mit ihm zusammenwirkenden Riemenscheiben 7 läuft, weist der Flachriemen 3 mindestens eine sich in seiner Längsrichtung erstreckende Führungsnut auf, während die Riemenscheiben 7 mit Führungsrippen versehen sind, die in die mindestens eine Führungsnut des Flachriemens 3 eingreifen. Durch das Zusammenwirken von Führungsnut und Führungsrippen wird der Flachriemen 3 auf den Scheibenlaufflächen der Riemenscheiben 7 zentriert, auch wenn die Riemenscheiben nicht perfekt aufeinander ausgerichtet sind. Die mindestens eine Führungsnut des Flachriemens wie auch die mindestens eine Führungsrippe der Riemenscheiben werden im Folgenden anhand von weiteren Zeichnungen eingehend beschrieben.In order to ensure that the flat belt 3 serving as a support means always runs correctly on the pulleys 7 interacting with it, the flat belt 3 has at least one guide groove extending in its longitudinal direction, while the pulleys 7 are provided with guide ribs which engage in the at least one guide engage the flat belt 3. By the cooperation of guide groove and guide ribs, the flat belt 3 is centered on the disc running surfaces of the pulleys 7, even if the pulleys are not perfectly aligned with each other. The at least one guide groove of the flat belt as well as the at least one guide rib of the pulleys are described in detail below with reference to further drawings.

Fig. 2 zeigt einen auf einer Riemenscheibe 27 aufliegenden Flachriemen 23. Der Flachriemen umfasst einen Riemenkörper 23.1 mit einer ersten Riemenlauffläche 23.5, eine Rückenverstärkungsschicht 23.3 sowie mehrere Zugstränge 23.2, die in den Riemenkörper eingebettet sind. Der Riemenkörper 23.1 besteht aus einem elastischen und verschleissresistenten Material, vorzugsweise aus einem elastischen Kunststoff, wie beispielsweise Polyurethan (PU) oder Ethylen-Propylen-DienKautschuk (EPDM). Um die seitwärts gerichteten Führungskräfte, die von den ineinander greifenden Führungsrippen und Führungsnuten aufgenommen werden müssen, etwas zu reduzieren, kann dem elastischen Material des Riemenkörpers 23.1 ein dessen Reibwert gegenüber der Riemenscheibe vermindernder Zusatz, beispielsweise Silikon, Polyäthylen oder Baumwollfasern, beigefügt werden. Als Zugstränge 23.2 können runde oder flächige Litzen aus feinen Stahldrähten oder aus hochfesten Kunststofffasern, wie beispielsweise Aramidfasern, verwendet werden. Die Rückenverstärkungsschicht 23.3 kann ein Gewebe aus Baumwoll- oder Kunststofffasern sein oder aus einer Folie, beispielsweise einer Polyamidfolie, bestehen. Sie schützt den Riemenkörper 3.1 vor mechanischen Beschädigungen. Fig. 2 shows a flat belt 23 resting on a pulley 27. The flat belt comprises a belt body 23.1 with a first belt running surface 23.5, a back reinforcing layer 23.3 and a plurality of tension cords 23.2 embedded in the belt body. The belt body 23.1 consists of an elastic and wear-resistant material, preferably of an elastic plastic, such as polyurethane (PU) or ethylene-propylene-diene rubber (EPDM). In order to reduce somewhat the sideways guiding forces which must be absorbed by the interlocking guide ribs and guide grooves, the elastic material of the belt body 23.1 can be supplemented with an additive which reduces the coefficient of friction with respect to the pulley, for example silicone, polyethylene or cotton fibers. As tensile cords 23.2 round or flat strands of fine steel wires or high-strength plastic fibers, such as aramid fibers, can be used. The back reinforcing layer 23.3 may be a fabric made of cotton or plastic fibers or may consist of a film, for example a polyamide film. It protects the belt body 3.1 from mechanical damage.

Die Riemenscheibe 7, die im Aufzug die Funktion einer Antriebs-Riemenscheibe (Treibscheibe) oder einer UmlenkRiemenscheibe haben kann, ist üblicherweise aus Stahl, Grauguss oder Sphäroguss hergestellt, kann jedoch auch aus einem Kunststoff, wie beispielsweise Polyamid, bestehen. Im Interesse einer optimalen Nutzung des verfügbaren Schachtraums und eines möglichst geringen, an der Antriebsmaschine 2 erforderlichen Drehmoments, können die Riemenscheiben Durchmesser D von weniger als 100 mm aufweisen. Um während des Aufzugsbetriebs zu gewährleisten, dass der Flachriemen 23 stets auf der Scheibenlauffläche 7.1 der Riemenscheibe 27 geführt ist, ist die Riemenscheibe 27 mit einer Führungsrippe 27.2 versehen, die in eine im Flachriemen 23 vorhandene Führungsnut 23.4 eingreift. Bei der in Fig. 2 gezeigten Anordnung weisen die Führungsrippe 27.2 der Riemenscheibe 7, wie auch die Führungsnut 23.4 des Flachriemens 23 trapezförmige, im Wesentlichen zueinander komplementär ausgebildete Querschnitte auf. Zwischen der Führungsrippe 27.2 und der Führungsnut 23.4 ist ausreichend Spiel in axialer und radialer Richtung vorhanden, um zu gewährleisten, dass kein Keilriemeneffekt eintritt, so dass, wenn die Riemenscheibe als Treibscheibe eingesetzt ist, die vorgesehene Traktionskraft in keiner Situation überschritten wird. Dadurch wird das Risiko vermieden, dass, wenn im Falle einer Steuerungs- oder Antriebspanne die Aufzugskabine oder das Gegengewicht auf ihren unteren Wegbegrenzungen aufliegt, die Traktionskraft zwischen der Treibscheibe und dem Flachriemen so hoch bleibt, dass die Aufzugskabine oder das Gegengewicht weiter aufwärts bewegt werden. Bei als Umlenkriemenscheiben wirkenden Riemenscheiben wird durch das genannte Spiel gewährleistet, dass kein Keilriemeneffekt auftritt, durch den Schwingungen im Flachriemen angeregt werden.The pulley 7, which may have the function of a drive pulley (pulley) or a Umlenkriemenscheibe in the elevator, is usually made of steel, gray cast iron or ductile iron, but may also consist of a plastic, such as polyamide. In the interest of optimum utilization of the available manhole space and the lowest possible torque required on the engine 2, the pulleys may have a diameter D of less than 100 mm. To ensure during the elevator operation that the flat belt 23 is always guided on the disc running surface 7.1 of the pulley 27, the pulley 27 is provided with a guide rib 27.2, which engages in an existing in the flat belt 23 guide 23.4. At the in Fig. 2 shown arrangement, the guide rib 27.2 of the pulley 7, as well as the guide 23.4 of the flat belt 23 trapezoidal, substantially complementary to each other formed cross-sections. Between the guide rib 27.2 and the guide groove 23.4 sufficient clearance in the axial and radial directions is present to ensure that no V-belt effect occurs, so that when the pulley is used as a traction sheave, the intended traction force is exceeded in any situation. This avoids the risk that, in the event of a control or drive span, if the elevator car or counterweight rests on its lower travel limits, the tractive force between the traction sheave and the flat belt remains high enough to further move the elevator car or counterweight upwards. When acting as Umlenkriemenscheiben pulleys is ensured by the said game that no V-belt effect occurs, are excited by the vibrations in the flat belt.

Unter Keilriemeneffekt sind Klemmwirkungen zwischen einer Keilnut einer Keilriemenscheibe und einem in der Keilnut laufenden Keilriemen zu verstehen. Diese Klemmwirkungen führen einerseits zu einer Erhöhung der zwischen der Keilnut und dem Keilriemen auftretenden Normalkräfte und damit der erreichbaren Traktionskraft. Andererseits können sie beim Herausführen des Keilriemens aus der Keilnut der Keilriemenscheibe Schwingungen im ablaufenden Keilriementrum anregen.Under V-belt effect are clamping effects between a keyway of a V-belt pulley and a running in the keyway V-belt to understand. These clamping effects lead on the one hand to an increase in the normal forces occurring between the keyway and the V-belt and thus the achievable traction force. On the other hand, they can excite vibrations in the expiring Keilriementrum when taking out the V-belt from the keyway of the V-belt pulley.

Fig. 3 zeigt wiederum einen mit seiner ersten Riemenlauffläche 33.5 auf einer Riemenscheibe 37 aufliegenden Flachriemen 33. Im Unterschied zur Anordnung gemäss Fig. 2 weist hier der Flachriemen 33 zwei Führungsnuten 33.4 auf, wobei in jede der Führungsnuten eine von zwei Führungsrippen 37.2 der Riemenscheibe 37 eingreift. Die zur Vermeidung des seitlichen Wegdriftens des Flachriemens 33 erforderliche Führungskraft wird somit auf zwei Flanken der beiden Führungsnuten 33.4 verteilt, was die Funktionssicherheit und Verschleissresistenz der Riemenführung wesentlich erhöht. Fig. 3 again shows a with its first belt surface 33.5 resting on a pulley 37 flat belt 33. In contrast to the arrangement according to Fig. 2 Here, the flat belt 33 has two guide grooves 33.4, wherein one of two guide ribs 37.2 of the pulley 37 engages in each of the guide grooves. The required to avoid the lateral Wegdriftens the flat belt 33 guide force is thus distributed to two edges of the two guide grooves 33.4, which significantly increases the reliability and wear resistance of the belt guide.

Fig. 4 zeigt einen Flachriemen 43, der eine Riemenscheibe 47 - beispielsweise die in Fig. 1 dargestellte Kabinen-Riemenscheibe 7B - so umschlingt, dass er ihre Scheibenlauffläche 47.1 mit seiner zweiten Riemenlauffläche 43.6 - auch Riemenrücken genannt - berührt. Der Flachriemen 43 ist - neben einer Führungsnut 43.4 in seiner ersten Riemenlauffläche 43.5 - mit einer aus seiner (rückseitigen) zweiten Riemenlauffläche 43.6 hervorstehenden Rücken-Führungsrippe 43.8 versehen, die mit einer in der Scheibenlauffläche 47.1 vorhandenen Scheiben-Führungsnut 47.4 der Riemenscheibe 47 zusammenwirkt. Die Rückenverstärkungsschicht 43.3 kann dabei als Verschleissschutz für die Rücken-Führungsrippe 43.8 wirken. Eine solche Rückenverstärkungsschicht ist jedoch nicht zwingend erforderlich. Die in Fig. 4 dargestellte Ausführungsform ermöglicht es, Tragmittelanordnungen in Aufzugsanlagen mit geführten Flachriemen zu realisieren, bei welchen die Flachriemen mehrere Riemenscheiben umlaufen, welche so angeordnet sind, dass die Flachriemen dabei in einander entgegengesetzten Richtungen gekrümmt werden. Fig. 4 shows a flat belt 43, the pulley 47 - for example, the in Fig. 1 shown car pulley 7B - so wraps around that it touches its disc running surface 47.1 with its second belt running surface 43.6 - also called the belt back. The flat belt 43 is provided - in addition to a guide groove 43.4 in its first belt running surface 43.5 - with a rear guide rib 43.8 projecting from its (rear) second belt running surface 43.6, which cooperates with a disk guide groove 47.4 of the belt pulley 47 present in the wheel running surface 47.1. The back reinforcing layer 43.3 can be used as wear protection for the back guide rib 43.8 Act. However, such a back reinforcing layer is not mandatory. In the Fig. 4 illustrated embodiment makes it possible to realize Tragmittelanordnungen in elevator systems with guided flat belts, in which the flat belts rotate around a plurality of pulleys, which are arranged so that the flat belts are curved in opposite directions.

Aus Fig. 2, 3 und 4 ist erkennbar, dass die in die Riemenkörper 23.1, 33.1, 43.1 eingebetteten Zugstränge 23.2; 33.2; 43.2 in den Bereichen der Führungsnuten 23.4, 33.4, 47.4 weiter voneinander beabstandet sind, als ausserhalb eines solchen Bereichs. Dies ermöglicht es, die Flachriemen mit einer grösstmöglichen Anzahl von nebeneinander angeordneten Zugsträngen 23.2; 33.2; 43.2 auszurüsten, um Flachriemen mit einer grösstmöglichen zulässigen Zugbelastung zu erzeugen.Out Fig. 2, 3 and 4 It can be seen that the tension cords 23.2; 23.2; embedded in the belt bodies 23.1, 33.1, 43.1; 33.2; 43.2 in the areas of the guide grooves 23.4, 33.4, 47.4 are further spaced from each other than outside of such an area. This makes it possible, the flat belt with a maximum number of juxtaposed Zugsträngen 23.2; 33.2; 43.2 to produce flat belts with a maximum allowable tensile load.

Die Fig. 5 - 8 zeigen in vergrösserten Ansichten Details unterschiedlich geformter und ausgebildeter Führungsnuten und Führungsrippen von Flachriemen und mit diesen zusammenwirkenden Riemenscheiben.The Fig. 5-8 show in enlarged views details of differently shaped and formed guide grooves and guide ribs of flat belts and with these cooperating pulleys.

Fig. 5 zeigt vergrössert eine Führungsrippe 57.2 einer Riemenscheibe 57 und die korrespondierende Führungsnut 53.4 eines Flachriemens 53, wobei die Ausführung und die Anordnung dieser Elemente im Wesentlichen den korrespondierenden Elementen gemäss Fig. 2 und 3 entsprechen. Zu erkennen ist, dass, wenn die erste Riemenlauffläche 53.5 des Flachriemens auf der Scheibenlauffläche 57.1 aufliegt, zwischen der Führungsrippe 57.2 und der Führungsnut 53.4 Axialspiel Sa wie auch Radialspiel Sr vorhanden ist, um, wie vorstehend erläutert, eine Traktionserhöhung durch einen Keilriemeneffekt zu vermeiden. Zur Gewährleistung einer einwandfreien Führungswirkung ist es vorteilhaft, wenn das in Richtung der Riemenscheibenachse gemessene Axialspiel Sa 0.1 mm bis 3 mm oder 0.5% bis 10% der Breite des Flachriemens beträgt. Um das tangentiale Auflaufen des Flachriemens 53 auf die Riemenscheibe 57 und die Führungsrippe 57.2 - insbesondere im Fall von Abweichungen der Richtung der Riemenlängsachse von der Richtung der Tangente auf die Riemenscheibe - zu optimieren, sind die Flanken 57.3 der Führungsrippe 57.2, wie auch die Flanke 53.7 der Führungsnut 53.4 vorzugsweise gegeneinander geneigt, so dass im Falle einer Führungsnut bzw. einer Führungsrippe mit trapezförmigem oder dreieckförmigem (Fig. 7) Querschnitt der Winkel α zwischen den Flanken der Führungsnut bzw. der Führungsrippe im Bereich zwischen 0° und 120°, vorzugsweise zwischen 10° und 60° liegt. Fig. 5 shows enlarged a guide rib 57.2 of a pulley 57 and the corresponding guide groove 53.4 of a flat belt 53, the execution and the arrangement of these elements substantially corresponding to the corresponding elements FIGS. 2 and 3 correspond. It can be seen that, when the first belt running surface 53.5 of the flat belt rests on the disk running surface 57.1, between the guide rib 57.2 and the guide groove 53.4 axial play S a as well as radial clearance S r is present, as explained above, a traction increase by a V-belt effect to avoid. To ensure a perfect guiding effect, it is advantageous if the axial play S a measured in the direction of the pulley axis amounts to 0.1 mm to 3 mm or 0.5% to 10% of the width of the flat belt. In order to optimize the tangential emergence of the flat belt 53 on the pulley 57 and the guide rib 57.2 - especially in the case of deviations of the direction of the belt longitudinal axis from the direction of the tangent to the pulley - are the flanks 57.3 of the guide rib 57.2, as well as the flank 53.7 the guide groove 53.4 preferably inclined towards each other, so that in the case of a guide groove or a guide rib with trapezoidal or triangular ( Fig. 7 ) Cross-section of the angle α between the flanks of the guide groove or the guide rib in the range between 0 ° and 120 °, preferably between 10 ° and 60 °.

Fig. 6 zeigt ebenfalls eine Führungsrippe 67.2 einer Riemenscheibe 67 und eine korrespondierende Führungsnut 63.4 des Flachriemens 63 welche trapezförmige Querschnitte aufweisen, wobei die Oberfläche der Führungsnut 63.4 des Flachriemens mit einer reibungs- und/oder verschleissreduzierenden Schutzschicht 63.9 versehen ist. Die Schutzschicht 63.9 kann beispielsweise in Form einer Gewebeverstärkung oder einer Kunststofffolie vorhanden sein. Fig. 6 also shows a guide rib 67.2 of a pulley 67 and a corresponding guide groove 63.4 of the flat belt 63 which have trapezoidal cross-sections, wherein the surface of the guide groove 63.4 of the flat belt is provided with a friction and / or wear-reducing protective layer 63.9. The protective layer 63.9 may be present for example in the form of a fabric reinforcement or a plastic film.

Fig. 7 zeigt eine vorteilhafte Ausführungsform einer zwischen einem Flachriemen 73 und einer Riemenscheibe 77 wirkenden Riemenführung. Diese ist dadurch gekennzeichnet, dass die Riemenscheibe 77 eine dreieckförmige Führungsrippe 7.2 aufweist, die in eine dreieckförmige Führungsnut 73.4 des Flachriemens 73 eingreift. Diese Riemenführung beansprucht in Richtung der Breite des Flachriemens wenig Platz und lässt deshalb die grösstmögliche Anzahl von nebeneinander im Riemenkörper eingebetteten Zugsträngen 73.2 zu. Fig. 7 shows an advantageous embodiment of acting between a flat belt 73 and a pulley 77 belt guide. This is characterized in that the pulley 77 has a triangular guide rib 7.2, which engages in a triangular guide groove 73.4 of the flat belt 73. This belt guide takes up little space in the direction of the width of the flat belt and therefore allows for the largest possible number of tension strands 73.2 embedded in the belt body side by side.

Fig. 8 zeigt eine weitere mögliche Ausführungsform einer zwischen einer Riemenscheibe 87 und einem Flachriemen 83 wirkenden Riemenführung, bei der jeweils mindestens eine Führungsnut 83.4 im Flachriemen 83 und eine Führungsrippe 87.2 an der Riemenscheibe 87 vorhanden sind, die kreisabschnittförmige Querschnitte aufweisen. Fig. 8 shows another possible embodiment of acting between a pulley 87 and a flat belt 83 belt guide, in each of which at least one guide groove 83.4 in the flat belt 83 and a guide rib 87.2 on the pulley 87 are present, the circular section-shaped cross-sections.

Fig. 9 zeigt eine Riemenscheibe 97, auf der zwei parallel angeordnete Flachriemen 93 mit Führungsnuten 93.4.1 und 93.4.2 aufliegen. Die Riemenscheibe 97 umfasst zwei nebeneinander angeordnete Scheibenlaufflächen 97.1.1, 97.1.2, von denen jede mit einer Führungsrippe 97.2.1, 97.2.2 versehen ist. Fig. 9 shows a pulley 97, resting on the two parallel flat belt 93 with guide grooves 93.4.1 and 93.4.2. The pulley 97 comprises two juxtaposed disc running surfaces 97.1.1, 97.1.2, each of which is provided with a guide rib 97.2.1, 97.2.2.

Auf einer solchen Riemenscheibe können auch mehr als zwei Flachriemen angeordnet sein, wobei jeder der Flachriemen mehr als eine Führungsnut und jede Scheibenlauffläche mehr als eine Führungsrippe aufweisen können.On such a pulley, more than two flat belts can be arranged, wherein each of the flat belts more than one guide groove and each disc running surface can have more than one guide rib.

Selbstverständlich sind die vorstehend gemachten Angaben über die Anzahl von Führungsrippen und korrespondierenden Führungsnuten, über das Spiel Sa und Sr zwischen Führungsrippe und Führungsnuten sowie über die Anwendung einer Rückenführungsrippe auf alle gezeigten Ausführungsformen der Führungsrippen und Führungsnuten anwendbar. Dies gilt ebenso für die Anwendung einer Schutzschicht zur Reduktion von Reibung und Verschleiss an der Oberfläche von Führungsnuten des Flachriemens wie auch für die Anwendung einer Rückenverstärkungsschicht im Bereich der zweiten Riemenlauffläche.Of course, the above information about the number of guide ribs and corresponding guide grooves, about the game S a and S r between the guide rib and guide grooves and the application of a spine guide rib on all embodiments of the guide ribs and guide grooves shown applicable. This also applies to the application of a protective layer to reduce friction and wear on the surface of guide grooves of the flat belt as well as for the application of a back reinforcing layer in the region of the second belt surface.

Claims (14)

  1. Lift with at least one belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87) and at least one flat belt (3; 23; 33; 43; 53; 63; 73; 83) for supporting and moving a lift cage (4), wherein the flat belt loops around a part of the circumference of the belt pulley, wherein the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) has in the region of a first belt running surface (23.5; 43.5; 53.5) at least one guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4) and the belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87) is provided with at least one guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2), which protrudes from its pulley running surface (27.1; 37.1; 47.1; 57.1; 97.1.1; 97.1.2) and which extends in the circumferential direction of the pulley running surface, characterised in that when the first belt running surface (23.5; 33.5; 43.5; 53.5) of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) rests on the pulley running surface (27.1; 37.1; 47.1; 57.1; 97.1.1; 97.1.2) and the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2) engages in the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) a play (axial play Sa) is present between the guide rib and the guide groove in the direction of the axis of belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87; 97).
  2. Lift according to claim 1, characterised in that the flat belt (3; 23; 33; 43; 53; 63; 73; 83) comprises a rectangular belt body (23.1; 33.1; 43.1) with a rectangular cross-section of resilient material in which a plurality of tensile strands (23.2; 33.2; 43.2; 73.2), which extend in the longitudinal direction of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) is embedded.
  3. Lift according to claim 1 or 2, characterised in that the cross-section of the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2) of the belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87) is formed to be complementary to the cross-section of the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4) of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93).
  4. Lift according to any one of claims 1 to 3, characterised in that the axial play Sa between the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2) and the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) is 0.1 millimetres to 3 millimetres.
  5. Lift according to any one of claims 1 to 3, characterised in that the axial play Sa between the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2) and the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) is 0.5% to 10% of the width of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93).
  6. Lift according to any one of claims 1 to 5, characterised in that a play (radial play Sr) is present between the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2) and the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) also in the radial direction of the belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87; 97) when the first belt running surface (23.5; 33.5; 43.5; 53.5) of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) rests on the pulley running surface (27.1; 37.1; 47.1; 57.1; 97.1.1; 97.1.2) of the belt pulley.
  7. Lift according to any one of claims 1 to 6, characterised in that the guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) and the guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2) have a trapezium-shaped or a triangular cross-section or a cross-section in the form of a section of a circle.
  8. Lift according to claim 7, characterised in that in the case of a guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) or a guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 97.2.1, 97.2.2) with a trapezium-shaped or triangular cross-section the angle α between the flanks of the guide groove or the guide rib lies in the range between 0° and 120°, preferably between 10° and 60°.
  9. Lift according to any one of claims 1 to 8, characterised in that the surface of at least one guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) is provided with a friction-reducing and/or wear-reducing protective layer (63.9).
  10. Lift according to any one of claims 2 to 9, characterised in that added to the resilient material of the belt body (23.1; 33.1; 43.1) of the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) is an additive which reduces the co-efficient of friction thereof.
  11. Lift according to any one of claims 1 to 10, characterised in that the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) has a plurality of parallel guide groves (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) and the belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87; 97) has a plurality of corresponding guide ribs (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2).
  12. Lift according to any one of claims 1 to 11, characterised in that it comprises a plurality of parallelly arranged flat belts (3; 23; 33; 43; 53; 63; 73; 83; 93), which are provided with guide grooves (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2), as support means and the belt pulley (7A, 7B, 7C; 27; 37; 47; 57; 67; 77; 87; 97) has a plurality of pulley running surfaces (27.1; 37.1; 47.1; 57.1; 97.1.1; 97.1.2) arranged adjacent to one another, wherein each of the pulley running surfaces is provided with at least one guide rib (27.2; 37.2; 57.2; 67.2; 77.2; 87.2; 97.2.1, 97.2.2).
  13. Lift according to any one of claims 2 to 12, characterised in that the arrangement of the tensile strands (23.2; 33.2; 43.2; 73.2) in the belt body (23.1; 33.1; 43.1) is so selected that in the region of a guide groove (23.4; 33.4; 43.4; 53.4; 63.4; 73.4; 83.4; 93.4.1, 93.4.2) these are spaced further apart than outside such a region.
  14. Lift according to any one of claims 1 to 13, characterised in that the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) has a back guide rib (43.8) protruding from a (rear-side) second belt running surface (43.6), wherein this back guide rib co-operates with a guide groove (47.4) in the pulley running surface (47.1) of a deflecting belt pulley (47), which the flat belt (3; 23; 33; 43; 53; 63; 73; 83; 93) so runs around that it contacts the deflecting belt pulley (47) by its second belt running surface (43.6).
EP05791414.5A 2004-10-18 2005-10-14 Flat belt driven elevator Not-in-force EP1802548B1 (en)

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EP05791414.5A EP1802548B1 (en) 2004-10-18 2005-10-14 Flat belt driven elevator

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EP04105126 2004-10-18
PCT/CH2005/000603 WO2006042427A1 (en) 2004-10-18 2005-10-14 Lift comprising a flat belt as a tractive element
EP05791414.5A EP1802548B1 (en) 2004-10-18 2005-10-14 Flat belt driven elevator

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EP1802548A1 EP1802548A1 (en) 2007-07-04
EP1802548B1 true EP1802548B1 (en) 2015-01-07

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EP (1) EP1802548B1 (en)
KR (1) KR100921360B1 (en)
CN (1) CN101044084B (en)
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Also Published As

Publication number Publication date
TW200626465A (en) 2006-08-01
ES2534464T3 (en) 2015-04-23
EP1802548A1 (en) 2007-07-04
WO2006042427A1 (en) 2006-04-27
KR20070057959A (en) 2007-06-07
US20080087500A1 (en) 2008-04-17
TWI350814B (en) 2011-10-21
BRPI0517102B1 (en) 2018-04-10
MY143607A (en) 2011-06-15
BRPI0517102A (en) 2008-09-30
KR100921360B1 (en) 2009-10-13
US8336675B2 (en) 2012-12-25
CN101044084B (en) 2012-03-28
CN101044084A (en) 2007-09-26
AR051394A1 (en) 2007-01-10

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