EP0376167B1 - Mast for a building lift, in particular for a rack lift - Google Patents
Mast for a building lift, in particular for a rack lift Download PDFInfo
- Publication number
- EP0376167B1 EP0376167B1 EP89123687A EP89123687A EP0376167B1 EP 0376167 B1 EP0376167 B1 EP 0376167B1 EP 89123687 A EP89123687 A EP 89123687A EP 89123687 A EP89123687 A EP 89123687A EP 0376167 B1 EP0376167 B1 EP 0376167B1
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- Prior art keywords
- mast
- honeycomb elements
- pylon
- pylon according
- honeycomb
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- Expired - Lifetime
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- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000011324 bead Substances 0.000 claims description 2
- 238000004873 anchoring Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009419 refurbishment Methods 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
- B66B9/187—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with a liftway specially adapted for temporary connection to a building or other structure
Definitions
- the invention relates to a mast according to the preamble of claim 1.
- the stiffening struts arranged between the corner supports consist of polygonal plates, for example in the form of isosceles or isosceles trapezoids, which can be provided in a different arrangement to one another and on each of them Side are connected to the corner supports, for example by riveting, screwing or welding.
- this known half-timbered mast is expressly intended for cranes, in particular for tower cranes, in order to fulfill a very special function by means of a specially designed strut, which however differs considerably and substantially from the function provided according to the invention.
- Such torsional forces which act at any point along the length of the mast of such a tower crane in the circumferential direction, lead to the nodes, i. H. at the junctures between the bracing and the corner support, at dangerous point loads that are undesirable and generally cannot be controlled.
- the mast which serves to guide the driving platform or the basket to train that this consists of suitable profiles, for example double T-bars or two screwed or welded U-bars. It is also known to use aluminum profile masts or so-called ladder masts, in which the guide rail consists of angle iron, U-iron or tubes and is connected to the adjacent corner supports via crossbars. If they are used as vertical masts, these masts are usually to be anchored to the building at a distance of 3 m each.
- free-standing masts which usually have heights of up to 9 m, those are used which have a triangular, rectangular, square or trapezoidal shape exhibit.
- corresponding struts are required, which are arranged between two adjacent belts.
- the struts in the case of small elevator masts partly consisting of round bars, while in the case of larger elevator masts, angle irons or pipes are used as struts.
- the respective mast straps, ie the corner supports consist of angle iron, U-iron, square tube or round tube.
- the loading conditions behave quite differently in a rack and pinion elevator, in which the basket guided on the two front belts of the mast is raised via a rack arranged on the one mast belt and a drive pinion meshing with it and connected to the basket.
- the load exerted here only affects the mast on one side. So there are large local bending forces that must be absorbed by appropriately trained struts, but without the overall weight of the mast being increased disadvantageously.
- the invention is therefore based on the object of designing the mast of the generic type in such a way that it has great flexural rigidity with simple, inexpensive production and at the same time allows the usual anchoring distance to be increased significantly.
- the arrangement is such that the struts consist of polygonal, flat honeycomb elements in the form of disks. These are provided in pairs facing each other between two adjacent belts and arranged one above the other in the relevant belt plane.
- these honeycomb elements which serve to reinforce and which are arranged in all belt levels consist of trapezoidal sheets.
- the weld seam can be provided either continuously or in a punctiform manner.
- the honeycomb elements are connected to one another on their shorter side facing each other.
- an inserted insert plate, a flat iron or the like is advantageously used, which further improves the stability and the power transmission.
- honeycomb elements have bevels on their free edges, which can optionally be connected to one another at the points where they meet, in particular by welding. This not only results in a larger one Stiffness, but it also achieves better corrosion protection. In addition, these bends are used to prevent accidents.
- the individual belts are continuously supported over their entire length, so that they thus have a more favorable stability behavior.
- the resulting local loads on the guide belts are transmitted well by the honeycomb sheets due to the disk effect thereby exerted, so that overall the local bending load on the guide belts is reduced or even completely eliminated.
- the load-bearing capacity of the mast straps can be increased by up to 100% compared to those with conventional struts, while the weight of the mast remains the same.
- the rear mast belt opposite the basket guide belts is also continuously supported in the case of a mast designed as a three-belt mast. This also significantly improves the stability behavior and avoids the risk of kinking. The local bending moments are further reduced or even completely eliminated as a result of the connection for anchoring.
- the invention achieves the particularly important advantage that the honeycomb-arranged sheet metal disks have a combined effect, namely a static load-bearing effect as a shear field due to the effect exerted by the sheet metal disks in conjunction with a truss effect due to the intended bending of the free edges of the sheet metal disks.
- a static load-bearing effect as a shear field due to the effect exerted by the sheet metal disks in conjunction with a truss effect due to the intended bending of the free edges of the sheet metal disks.
- this also results in a significant increase in the shear strength.
- the individual honeycomb elements are each additionally stabilized with at least one bead. This further increases the load capacity and at the same time reduces the risk of bulging.
- honeycomb elements can be fixed to the belts by means of long, smooth weld seams is of particular importance from a manufacturing point of view, which was not possible with the previous truss constructions.
- the greater anchoring distance achieved due to the great flexural rigidity of the mast according to the invention is very advantageous because rack and pinion lifts are used in particular for renovation and refurbishment work on buildings. In such work, the operating times are often shorter than when working on new buildings, so that a larger anchoring distance in connection with the resulting shorter time expenditure for mast anchoring is particularly advantageous.
- the respective building facade is less damaged than before.
- the design according to the invention makes it possible in an unforeseeable manner to considerably increase the anchoring distances in the mast of the construction hoist, but at the same time also to load the mast more heavily, since this has an increased bending stiffness.
- the mast 1 shown which is provided for a rack and pinion elevator, is designed as a three-belt mast, which has a triangular cross section with accordingly three corner supports 2, 3, 4.
- the two front corner supports 2, 3 and mast straps are cross-sectional formed as a square tube and serve to guide a basket, not shown. Its drive takes place with the aid of at least one drive pinion, which meshes with a toothed rack 5, which is attached to the rear of the left guide belt 2 and extends along the latter.
- the rear mast belt 4 is designed in the manner shown in FIG. 3 as a round tube, the size of the cross section corresponding to that of a conventional scaffold tube, so that it can be anchored to the building by means of common scaffold clamps.
- each of the belt levels formed by two adjacent mast belts 2, 3, 4 is stiffened by struts.
- These struts consist of polygonal, flat honeycomb elements 6 in the form of sheet metal disks, which are provided in pairs facing each other between two adjacent belts 2, 3 and 3, 4 and 2, 4, respectively.
- the honeycomb elements 6 are arranged in pairs in the respective belt plane one above the other, so that they extend in the desired manner over the entire length of each belt plane.
- the honeycomb elements 6 each consist of a trapezoidal sheet, which accordingly has two mutually parallel sides - a shorter and a longer side - and mutually inclined side edges in the form of free edges. At these free edges of the honeycomb elements 6 largely rectangular bends 7 are provided in order to further improve the stability and the buckling behavior.
- the arrangement of the honeycomb elements 6 is such that they face each other in pairs in the manner shown, the longer side of the honeycomb elements 6 being fixed to the mast belt 2, 3 4 in question and the shorter side facing each other.
- connection of the honeycomb elements 6 both to one another and to the respective mast straps 2, 3, 4 takes place by means of welding, a correspondingly long weld seam 8 being provided in the embodiment according to FIGS. 1 to 3, while in the modified embodiment according to FIG. 4 spot welds 9 ensure the connection.
- an insert plate 10 a small flat iron or the like is inserted between the mutually facing shorter sides of each pair of honeycomb elements 6 before the welded connection is carried out.
- the stability is further increased, so that the forces occurring can be easily transferred from the bevel 7 of one sheet 6 via the web 10 to the bevel 7 of the other sheet 6.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Types And Forms Of Lifts (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
- Jib Cranes (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Warehouses Or Storage Devices (AREA)
Abstract
Description
Die Erfindung betrifft einen Mast gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a mast according to the preamble of claim 1.
Bei einem bekannten Mast der gattungsgemäßen Art (DE-A-3109 834) bestehen die zwischen den Eck-stützen angeordneten Versteifungsstreben aus polygonförmigen Platten, beispielsweise in Form von gleichschenkligen oder ungleichschenkligen Trapezen, die in unterschiedlicher Anordnung zueinander vorgesehen sein können und an ihrer jeweils einen Seite mit den Eckstützen, beispielsweise durch Vernieten, Verschrauben oder Verschweißen, verbunden sind.In a known mast of the generic type (DE-A-3109 834), the stiffening struts arranged between the corner supports consist of polygonal plates, for example in the form of isosceles or isosceles trapezoids, which can be provided in a different arrangement to one another and on each of them Side are connected to the corner supports, for example by riveting, screwing or welding.
Dieser bekannte Fachwerksmast ist jedoch ausdrücklich für Kräne, im speziellen für Turmkräne vorgesehen, um mittels einer besonders ausgestalteten Verstrebung eine ganz spezielle Funktion zu erfüllen, die sich jedoch beträchtlich und wesentlich von der erfindungsgemäß vorgesehenen Funktion unterscheidet. Es treten nämlich bei Turmdrehkränen ganz typischerweise spezielle Belastungen auf, die vor allen Dingen aus Torsionskräften bestehen und insbesondere vom seitlichen Verschwenken des Auslegers herrühren. Derartige Torsionskräfte, die an jeder Stelle entlang der Längenerstreckung des Mastes eines solchen Turmdrehkranes in Umfangsrichtung wirken, führen an den Knotenpunkten, d. h. an den Verbindungsstellen zwischen Verstrebung und Eckstütze, zu gefährlichen Punktbelastungen, die unerwünscht sind und in der Regel nicht beherrscht werden können.However, this known half-timbered mast is expressly intended for cranes, in particular for tower cranes, in order to fulfill a very special function by means of a specially designed strut, which however differs considerably and substantially from the function provided according to the invention. This is because, in tower cranes, there are very typically special loads that primarily consist of torsional forces and, in particular, result from the lateral pivoting of the jib. Such torsional forces, which act at any point along the length of the mast of such a tower crane in the circumferential direction, lead to the nodes, i. H. at the junctures between the bracing and the corner support, at dangerous point loads that are undesirable and generally cannot be controlled.
Demgegenüber treten auf dem Gebiet der Bauaufzüge ganz andere Anforderungen und andere Belastungen auf. Es wird nämlich ein solcher Bauaufzug, mit dem sich die Erfindung befaßt, zur Beförderung von Materialien und/oder Personen an der Baustelle eingesetzt. Dies erfolgt beispielsweise an einem zu renovierenden bzw. zu sanierenden Bauobjekt, an dem der Aufzug dann in aller Regel seitlich in geringem Abstand aufgestellt oder schräg angelehnt und in geeigneter Weise mittels Verankerungsmitteln, die zwischen Bauobjekt und Aufzug verlaufen, verankert wird. Hierbei verhalten sich die auftretenden Beanspruchungsverhältnisse völlig anders als bei einem Turmdrehkran, da bei einem Aufzug der an den zwei vorderen Mastgurten geführte Fahrkorb o. dgl. eine Belastung ausübt, die nur einseitig auf den Mast wirkt. Es treten also örtliche Biegekräfte auf, die beherrscht werden müssen, ohne daß jedoch das Gesamtgewicht des Aufzugsmastes - zur Erreichung einer großen Gesamthöhe und zur leichteren Montage der einzelnen Mastelementenachteilig erhöht wird und ohne daß beispielsweise die erforderlichen Verankerungsabstände verringert werden müssen. Hierbei ist es ja grundsätzlich erwünscht, große Verankerungsabstände wählen zu können, um an dem zu sanierenden Bauobjekt so wenig Verankerungsstellen wie möglich mit den sich ergebenenden Bauwerkszerstörungen vorsehen zu müssen.On the other hand, completely different requirements and different loads arise in the field of construction lifts. Such a construction hoist, with which the invention is concerned, is used for the transport of materials and / or people at the construction site. This takes place, for example, on a building object to be renovated or refurbished, on which the elevator is then generally set up at a short distance to the side or leaned at an angle and anchored in a suitable manner by means of anchoring means which run between the building object and the elevator. Here, the stresses that occur occur completely differently than in the case of a tower crane, since in an elevator the car or the like guided on the two front mast belts exerts a load which only acts on the mast on one side. So there are local bending forces that have to be mastered, but without the total weight of the elevator mast - to achieve a large overall height and for easier assembly of the individual mast elements is increased disadvantageously and without, for example, the required anchoring distances have to be reduced. Here it is basically desirable to be able to choose large anchoring distances in order to have to provide as few anchoring points as possible with the resulting structural destruction on the building object to be renovated.
Bei Lastenaufzügen bzw. Bauaufzügen ist es bekannt, den zur Führung der Fahrbühne bzw. des Korbes dienenden Mast derart auszubilden, daß dieser aus geeigneten Profilen, beispielsweise Doppel-T-Eisen oder aus zwei miteinander verschraubten bzw. verschweißten U-Eisen, besteht. Es ist auch bekannt, Aluminium-Profilmaste oder sog. Leitermaste zu verwenden, bei denen die Führungsschiene aus Winkeleisen, U-Eisen oder Rohren besteht und mit den benachbarten Eckstützen über Querstege verbunden ist. Diese Maste sind, sofern sie als Senkrechtmaste zum Einsatz gelangen, üblicherweise im Abstand von jeweils 3 m mit dem Bauwerk zu verankern. Wenn derartige Maste als Schrägaufzüge -üblicherweise mit Tragkräften bis zu 0,2 t - verwendet werden, werden sie häufig nur an das betreffende Bauwerk angelehnt, wobei im Fall von längeren Masten lediglich eine Abstützung nach unten mittels einer Strebe erfolgt. Diese Art der Aufzugsmaste wird jedoch üblicherweise nur mit Verankerung benutzt.In the case of freight elevators or construction elevators, it is known to use the mast which serves to guide the driving platform or the basket to train that this consists of suitable profiles, for example double T-bars or two screwed or welded U-bars. It is also known to use aluminum profile masts or so-called ladder masts, in which the guide rail consists of angle iron, U-iron or tubes and is connected to the adjacent corner supports via crossbars. If they are used as vertical masts, these masts are usually to be anchored to the building at a distance of 3 m each. If such masts are used as inclined lifts - usually with load capacities of up to 0.2 t - they are often only leaned against the structure in question, in the case of longer masts only a downward support is provided by means of a strut. However, this type of elevator mast is usually only used with anchoring.
Als freistehende Maste, die zumeist Höhen von bis zu 9 m aufweisen, gelangen solche zur Anwendung, die querschnittlich eine Dreieck-, Rechteck-, Quadrat- oder Trapezform aufweisen. Um derartige freistehende Maste in der erforderlichen Weise zu versteifen, sind entsprechende Verstrebungen erforderlich, die zwischen jeweils zwei benachbarten Gurten angeordnet werden. In diesem Zusammenhang sind bisher nur Fachwerkgitterkonstruktionen bekannt, wobei die Verstrebungen bei kleinen Aufzugmasten zum Teil aus Rundeisen bestehen, während bei größeren Aufzugmasten Winkeleisen oder Rohre als Verstrebungen zur Anwendung gelangen. Die jeweiligen Mastgurte, d.h. die Eckstützen bestehen aus Winkeleisen, U-Eisen, Vierkantrohr oder Rundrohr.As free-standing masts, which usually have heights of up to 9 m, those are used which have a triangular, rectangular, square or trapezoidal shape exhibit. In order to stiffen such free-standing masts in the required manner, corresponding struts are required, which are arranged between two adjacent belts. In this connection, so far only truss framework structures are known, the struts in the case of small elevator masts partly consisting of round bars, while in the case of larger elevator masts, angle irons or pipes are used as struts. The respective mast straps, ie the corner supports consist of angle iron, U-iron, square tube or round tube.
Was die Führung der Fahrbühne bzw. des -korbes anbetrifft, sind bisher an Bauaufzügen und Lastenaufzügen, von wenigen Ausnahmen abgesehen, nur Seilaufzüge im Einsatz. Hierbei übt das vor dem Mast hochlaufende Seil in Höhe der Gesamtlast einen Druck auf den Mast aus. Das gleiche gilt für das hinter dem Mast laufende Seil, so daß insofern eine gleichförmige bzw. ausgeglichene Biegebelastung auf den Mast ausgeübt wird.So far, with regard to the guidance of the driving platform and / or cage, only rope hoists have been used on construction and freight lifts, with a few exceptions. The rope running up in front of the mast exerts pressure on the mast at the level of the total load. The same applies to the rope running behind the mast, so that a uniform or balanced bending load is exerted on the mast.
Ganz anders verhalten sich jedoch die Beanspruchungsverhältnisse bei einem Zahnstangenaufzug, bei dem der an den zwei vorderen Gurten des Mastes geführte Korb über eine an dem einen Mastgurt angeordnete Zahnstange sowie ein hiermit kämmendes, mit dem Korb in Verbindung stehendes Antriebsritzel angehoben wird. Die hierbei ausgeübte Belastung wirkt nur einseitig auf den Mast. Es treten also große örtliche Biegekräfte auf, die durch entsprechend ausgebildete Verstrebungen aufgefangen werden müssen, ohne daß jedoch das Gesamtgewicht des Mastes nachteilig erhöht wird.However, the loading conditions behave quite differently in a rack and pinion elevator, in which the basket guided on the two front belts of the mast is raised via a rack arranged on the one mast belt and a drive pinion meshing with it and connected to the basket. The load exerted here only affects the mast on one side. So there are large local bending forces that must be absorbed by appropriately trained struts, but without the overall weight of the mast being increased disadvantageously.
Der Erfindung liegt daher die Aufgabe zugrunde, den Mast der gattungsgemäßen Art derart auszugestalten, daß er bei einfacher, kostengünstiger Herstellung eine große Biegesteifigkeit aufweist und es gleichzeitig erlaubt, den üblichen Verankerungsabstand wesentlich zu erhöhen.The invention is therefore based on the object of designing the mast of the generic type in such a way that it has great flexural rigidity with simple, inexpensive production and at the same time allows the usual anchoring distance to be increased significantly.
Diese Aufgabe wird bei dem Mast gemäß der Erfindung durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen hiervon sind in den weiteren Ansprüchen beschrieben.This object is achieved in the mast according to the invention by the features of claim 1. Advantageous refinements of this are described in the further claims.
Bei dem für einen Bauaufzug, insbesondere einen Zahnstangenaufzug vorgesehenen Mast gemäß der Erfindung, der vorzugsweise als Dreigurtmast mit drei im Abstand voneinander vorgesehenen Eckstützen ausgebildet ist, ist die Anordnung derart getroffen, daß die Verstrebungen aus polygonförmigen flächigen Wabenelementen in Form von Scheiben bestehen. Diese sind paarweise jeweils einander zugekehrt zwischen zwei benachbarten Gurten vorgesehen und in der betreffenden Gurtebene übereinander angeordnet.In the mast provided for a construction hoist, in particular a rack and pinion hoist according to the invention, which is preferably designed as a three-belt mast with three corner supports provided at a distance from one another, the arrangement is such that the struts consist of polygonal, flat honeycomb elements in the form of disks. These are provided in pairs facing each other between two adjacent belts and arranged one above the other in the relevant belt plane.
Diese der Aussteifung dienenden Wabenelemente, die in allen Gurtebenen angeordnet sind, bestehen in vorteilhafter Ausgestaltung der Erfindung aus trapezförmigen Blechen. Diese sind erfindungsgemäß mit ihrer jeweils kürzeren Seite einander zugekehrt und mit ihrer längeren Seite am betreffenden Gurt, insbesondere durch Schweißen, festgelegt. Hierbei kann die Schweißnaht entweder durchlaufend oder aber punktförmig vorgesehen sein.In an advantageous embodiment of the invention, these honeycomb elements which serve to reinforce and which are arranged in all belt levels consist of trapezoidal sheets. According to the invention, these face each other with their shorter side and are fixed with their longer side to the relevant belt, in particular by welding. In this case, the weld seam can be provided either continuously or in a punctiform manner.
In weiterer Ausgestaltung der Erfindung sind die Wabenelemente an ihrer einander zugekehrten kürzeren Seite miteinander verbunden. Hierbei gelangt vorteilhafterweise ein eingelegtes Einsatzblech, ein Flacheisen oder dgl. zum Einsatz, was die Stabilität und die Kraftübertragung weiter verbessert.In a further embodiment of the invention, the honeycomb elements are connected to one another on their shorter side facing each other. Here, an inserted insert plate, a flat iron or the like is advantageously used, which further improves the stability and the power transmission.
Es ist von Vorteil, wenn die Wabenelemente an ihren freien Rändern Abkantungen aufweisen, die gegebenenfalls an den Stellen, an denen sie aneinanderstoßen, miteinander verbunden sein können, und zwar insbesondere durch Schweißen. Hierdurch ergibt sich nicht nur weiterhin eine größere Steifigkeit, sondern es wird auch ein besserer Korrosionsschutz erzielt. Außerdem dienen diese Abkantungen der Unfallverhütung.It is advantageous if the honeycomb elements have bevels on their free edges, which can optionally be connected to one another at the points where they meet, in particular by welding. This not only results in a larger one Stiffness, but it also achieves better corrosion protection. In addition, these bends are used to prevent accidents.
Aufgrund der Ausgestaltung des erfindungsgemäßen Mastes sind die einzelnen Gurte auf ihrer gesamten Länge kontinuierlich abgestützt, so daß sie somit ein günstigeres Stabilitätsverhalten aufweisen. Die auftretenden örtlichen Belastungen der Führungsgurte werden von den Wabenblechen aufgrund der hierdurch ausgeübten Scheibenwirkung gut übertragen, so daß dadurch insgesamt die örtliche Biegebelastung der Führungsgurte vermindert oder sogar völlig beseitigt ist. Wie eine praktische Erprobung gezeigt hat, kann hierdurch die Tragfähigkeit der Mastgurte im Vergleich zu solchen mit üblichen Verstrebungen um bis zu 100 % gesteigert werden, und zwar bei gleichbleibendem Gewicht des Mastes.Due to the design of the mast according to the invention, the individual belts are continuously supported over their entire length, so that they thus have a more favorable stability behavior. The resulting local loads on the guide belts are transmitted well by the honeycomb sheets due to the disk effect thereby exerted, so that overall the local bending load on the guide belts is reduced or even completely eliminated. As practical testing has shown, the load-bearing capacity of the mast straps can be increased by up to 100% compared to those with conventional struts, while the weight of the mast remains the same.
Aufgrund der beschriebenen Mastausgestaltung ist der den Korbführungsgurten gegenüberliegende hintere Mastgurt - bei einem als Dreigurtmast ausgebildeten Mast gleichfalls kontinuierlich abgestützt. Hierdurch ist ebenfalls das Stabilitätsverhalten wesentlich verbessert und die Gefahr des Knickens vermieden. Die örtlichen Biegemomente werden weiterhin infolge der Anbindung für die Verankerung reduziert oder sogar vollständig beseitigt.Because of the mast design described, the rear mast belt opposite the basket guide belts is also continuously supported in the case of a mast designed as a three-belt mast. This also significantly improves the stability behavior and avoids the risk of kinking. The local bending moments are further reduced or even completely eliminated as a result of the connection for anchoring.
Durch die Erfindung wird der besonders wesentliche Vorteil erzielt, daß sich aufgrund der wabenförmig angeordneten Blechscheiben eine kombinierte Wirkung ergibt, nämlich eine statische Tragwirkung als Schubfeld aufgrund der von den Blechscheiben ausgeübten Wirkung in Verbindung mit einer Fachwerkwirkung aufgrund der vorgesehenen Abkantung der freien Ränder der Blechscheiben. Dies bewirkt neben der erhöhten Maststeifigkeit auch eine deutliche Erhöhung der Querkrafttragfähigkeit.The invention achieves the particularly important advantage that the honeycomb-arranged sheet metal disks have a combined effect, namely a static load-bearing effect as a shear field due to the effect exerted by the sheet metal disks in conjunction with a truss effect due to the intended bending of the free edges of the sheet metal disks. In addition to the increased mast rigidity, this also results in a significant increase in the shear strength.
Es liegt im Rahmen der Erfindung, daß die einzelnen Wabenelemente jeweils mit wenigstens einer Sicke zusätzlich stabilisiert sind. Hierdurch wird die Tragfähigkeit weiter gesteigert und gleichzeitig die Gefahr des Ausbeulens vermindert.It is within the scope of the invention that the individual honeycomb elements are each additionally stabilized with at least one bead. This further increases the load capacity and at the same time reduces the risk of bulging.
Zur Verringerung des Mastgesamtgewichtes ist es schließlich noch möglich, die Wabenelemente jeweils mit einem oder mehreren Ausschnitten zu versehen. Diese Ausschnitte können aus Stabilitätsgründen mit Bördelungen versehen sein.Finally, to reduce the total mast weight, it is still possible to provide the honeycomb elements with one or more cutouts. These cutouts can be provided with flanges for reasons of stability.
Insgesamt wird durch den Mast gemäß der Erfindung eine außerordentlich steife Mastkonstruktion erzielt, die es erlaubt, den bisher üblichen Verankerungsabstand der einzelnen Mastelemente um mehr als 50 % zu erhöhen.Overall, an extremely rigid mast construction is achieved by the mast according to the invention, which allows the previously usual anchoring distance of the individual mast elements to be increased by more than 50%.
Fertigungstechnisch von besonderer Bedeutung ist der Umstand, daß die Wabenelemente mittels langer glatter Schweißnähte an den Gurten festgelegt werden können, was bei den bisherigen Fachwerkkonstruktionen nicht möglich war. Außerdem ist der aufgrund der großen Biegesteifigkeit des erfindungsgemäßen Mastes erzielte größere Verankerungsabstand deswegen sehr vorteilhaft, weil Zahnstangenaufzüge insbesondere für Renovierungs- und Sanierungsarbeiten an Bauwerken zum Einsatz gelangen. Bei derartigen Arbeiten sind die Einsatzzeiten häufig kürzer als bei Arbeiten an Neubauten, so daß ein größerer Verankerungsabstand in Verbindung mit dem dadurch erreichten kürzeren Zeitaufwand für die Mastverankerung von besonderem Vorteil ist. Außerdem wird auch aufgrund der geringeren Anzahl von Verankerungsstellen die jeweilige Bauwerksfassade weniger als bisher beschädigt.The fact that the honeycomb elements can be fixed to the belts by means of long, smooth weld seams is of particular importance from a manufacturing point of view, which was not possible with the previous truss constructions. In addition, the greater anchoring distance achieved due to the great flexural rigidity of the mast according to the invention is very advantageous because rack and pinion lifts are used in particular for renovation and refurbishment work on buildings. In such work, the operating times are often shorter than when working on new buildings, so that a larger anchoring distance in connection with the resulting shorter time expenditure for mast anchoring is particularly advantageous. In addition, due to the lower number of anchoring points, the respective building facade is less damaged than before.
Die erfindungsgemäße Ausbildung erlaubt es in nicht vorhersehbarer Weise, die Verankerungsabstände bei dem Mast des Bauaufzuges beträchtlich zu erhöhen, gleichzeitig aber den Mast auch höher zu belasten, da dieser eine erhöhte Biegesteifigkeit aufweist.The design according to the invention makes it possible in an unforeseeable manner to considerably increase the anchoring distances in the mast of the construction hoist, but at the same time also to load the mast more heavily, since this has an increased bending stiffness.
Die Erfindung wird im folgenden anhand der Zeichnung näher erläutert. Diese zeigt in:
- Fig. 1 einen mit den erfindungsgemäßen Wabenelementen versteiften Mast für einen Zahnstangenaufzug in Vorderansicht,
- Fig. 2 in Rückansicht sowie
- Fig. 3 vergrößert im Querschnitt gemäß Linie III-III nach Fig. 1 und
- Fig. 4 schematisch perspektivisch ein Mastdetail mit einer abgewandelten Ausführungsform der Befestigung der Wabenelemente.
- 1 is a front view of a mast stiffened with the honeycomb elements according to the invention,
- Fig. 2 in rear view as well
- Fig. 3 enlarged in cross section along line III-III of FIG. 1 and
- Fig. 4 shows schematically in perspective a mast detail with a modified embodiment of the attachment of the honeycomb elements.
Wie aus der Zeichnung ersichtlich, ist der dargestellte, für einen Zahnstangenaufzug vorgesehene Mast 1 als Dreigurtmast ausgebildet, der einen dreieckförmigen Querschnitt mit demgemäß drei Eckstützen 2, 3, 4 aufweist. Die beiden vorderen Eckstützen 2, 3 bzw. Mastgurte sind querschnittlich als Vierkantrohr ausgebildet und dienen zur Führung eines nicht näher dargestellten Korbes. Dessen Antrieb erfolgt mit Hilfe mindestens eines Antriebsritzels, das mit einer an der Rückseite des linken Führungsgurtes 2 angebrachten, entlang diesem verlaufenden Zahnstange 5 kämmt.As can be seen from the drawing, the mast 1 shown, which is provided for a rack and pinion elevator, is designed as a three-belt mast, which has a triangular cross section with accordingly three corner supports 2, 3, 4. The two front corner supports 2, 3 and mast straps are cross-sectional formed as a square tube and serve to guide a basket, not shown. Its drive takes place with the aid of at least one drive pinion, which meshes with a
Der hintere Mastgurt 4 ist in der aus Fig. 3 ersichtlichen Weise als Rundrohr ausgebildet, wobei die Größe des Querschnitts demjenigen eines üblichen Gerüstrohres entspricht, damit die Verankerung am Bau mittels gebräuchlicher Gerüstschellen erfolgen kann.The
Wie dargestellt, ist jede der durch jeweils zwei benachbarte Mastgurte 2, 3, 4 gebildete Gurtebene durch Verstrebungen versteift. Diese Verstrebungen bestehen aus polygonförmigen, flächigen Wabenelementen 6 in Form von Blechscheiben, die paarweise jeweils einander zugekehrt zwischen zwei benachbarten Gurten 2, 3 bzw. 3, 4 bzw. 2, 4 vorgesehen sind. Gleichzeitig sind die Wabenelemente 6 paarweise in der betreffenden Gurtebene übereinander angeordnet, so daß sie sich in der gewünschten Weise über die gesamte Länge jeder Gurtebene erstrecken.As shown, each of the belt levels formed by two
Die Wabenelemente 6 bestehen jeweils aus einem trapezförmigen Blech, das demgemäß zwei zueinander parallele Seiten - eine kürzere sowie eine längere Seite - sowie zueinander geneigte Seitenkanten in Form von freien Rändern aufweist. An diesen freien Rändern der Wabenelemente 6 sind jeweils weitgehend rechtwinklige Abkantungen 7 vorgesehen, um die Stabilität und das Knickverhalten weiter zu verbessern. Die Anordnung der Wabenelemente 6 ist derart, daß diese in der dargestellten Weise paarweise einander zugekehrt sind, wobei die Wabenelemente 6 mit ihrer längeren Seite am betreffenden Mastgurt 2, 3 4 festgelegt und mit ihrer jeweils kürzeren Seite einander zugekehrt sind.The
Die Verbindung der Wabenelemente 6 sowohl untereinander als auch mit den jeweiligen Mastgurten 2, 3, 4, erfolgt mittels Schweißen, wobei bei der Ausführungsform gemäß Fig. 1 bis 3 jeweils eine entsprechend lange Schweißnaht 8 vorgesehen ist, während bei der abgewandelten Ausführungsform gemäß Fig. 4 punktförmige Schweißnähte 9 für die Verbindung sorgen.The connection of the
Zwischen die einander zugekehrten kürzeren Seiten jedes Paares von Wabenelementen 6 ist beim dargestellten Ausführungsbeispiel jeweils ein Einsatzblech 10, ein kleines Flacheisen oder dgl. eingelegt, bevor die Schweißverbindung durchgeführt wird. Hierdurch wird die Stabilität weiter verstärkt, so daß die auftretenden Kräfte problemlos von der Abkantung 7 des einen Bleches 6 über den Steg 10 auf die Abkantung 7 des anderen Bleches 6 übertragen werden können.In the illustrated embodiment, an
Claims (10)
- Pylon with a plurality of spaced corner columns (2, 3, 4), each two adjacent corner columns being reinforced by bracing consisting of polygonal two-dimensional honeycomb elements (6) in the form of plates, and the honeycomb elements (6) being provided in pairs between two adjacent chords (2, 3 and 3, 4 and 4, 2) such that they face one another, arranged one above the other in the relevant chord plane and firmly connected together in pairs, characterised in that the pylon (1) is used for a building lift which is formed to guide a load-carrying means at its two front chords (2, 3).
- Pylon according to claim 1, characterised in that the honeycomb elements (6) are formed from trapezoidal metal sheets.
- Pylon according to claim 1 or 2, characterised in that the shorter sides of the honeycomb elements (6) face one another and their longer sides are secured to the relevant chord.
- Pylon according to one of claims 1 to 3, characterised in that the honeycomb elements (6) are connected together at their facing, shorter sides.
- Pylon according to claim 3 or 4, characterised in that the honeycomb elements (6) are connected together at their facing sides via an inserted intermediate metal sheet (10) or the like.
- Pylon according to one of claims 1 to 5, characterised in that the honeycomb elements (6) comprise bent portions (7) at their free edges.
- Pylon according to claim 6, characterised in that the bent portions (7) of adjacent honeycomb elements edges are connected together.
- Pylon according to one of claims 1 to 7, characterised in that the honeycomb elements (6) in each case comprise at least one bead.
- Pylon according to one of claims 1 to 8, characterised in that the honeycomb elements (6) in each case comprise at least one cutout portion in order to reduce the weight of the pylon.
- Pylon according to claim 9, characterised in that the cutout portions of the honeycomb elements (6) are provided with bent edges or flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT89123687T ATE86940T1 (en) | 1988-12-27 | 1989-12-21 | MAST FOR A CONSTRUCTION ELEVATOR, ESPECIALLY A RACK AND RACK ELEVATOR. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3843996 | 1988-12-27 | ||
| DE3843996A DE3843996A1 (en) | 1988-12-27 | 1988-12-27 | MAST FOR A RACK ELEVATOR |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0376167A2 EP0376167A2 (en) | 1990-07-04 |
| EP0376167A3 EP0376167A3 (en) | 1990-07-25 |
| EP0376167B1 true EP0376167B1 (en) | 1993-03-17 |
Family
ID=6370334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89123687A Expired - Lifetime EP0376167B1 (en) | 1988-12-27 | 1989-12-21 | Mast for a building lift, in particular for a rack lift |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0376167B1 (en) |
| AT (1) | ATE86940T1 (en) |
| DE (2) | DE3843996A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4113152A1 (en) * | 1991-04-23 | 1992-10-29 | Langer Ruth Geb Layher | LIFT FOR CONSTRUCTION MATERIALS, SCAFFOLDING ELEMENTS AND SCAFFOLDING |
| DE4447424C2 (en) * | 1994-02-22 | 1996-05-15 | Zeppenfeld Aloys Gmbh | Safety device for a construction elevator |
| DE4405651C1 (en) * | 1994-02-22 | 1995-08-10 | Zeppenfeld Aloys Gmbh | Elevator or lift used on building site |
| DE19627549A1 (en) * | 1995-09-22 | 1997-03-27 | Paul Lingen | Triangular-section mast used with building scaffolding |
| DE29705009U1 (en) * | 1997-03-19 | 1997-06-26 | Theodor Klaas GmbH & Co KG, 59387 Ascheberg | Roofing crane with modular telescopic sections |
| SE519047C2 (en) * | 2001-05-28 | 2003-01-07 | Goete Lindberg Med A Innovatio | Device at a post |
| CN102328861A (en) * | 2011-06-20 | 2012-01-25 | 吴江市德菱电梯配套有限公司 | Elevator counterweight |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1498124A (en) * | 1922-06-06 | 1924-06-17 | Bristol Steel Corp | Metal structure |
| US3112015A (en) * | 1960-02-15 | 1963-11-26 | Beatty Bros Ltd | Mast construction |
| US3371458A (en) * | 1966-06-30 | 1968-03-05 | Atlantic Res Corp | Structural unit |
| AT292966B (en) * | 1966-10-12 | 1971-09-27 | Friedrich Freimueller | Lattice mast built from shots |
| AT315419B (en) * | 1971-12-03 | 1974-05-27 | Alois Krasser | Tubular steel mast for construction hoists |
| FR2183424A5 (en) * | 1972-05-05 | 1973-12-14 | Perray Marc | |
| IT1141853B (en) * | 1980-03-19 | 1986-10-08 | Condecta Macchine Edili Srl | RETICULAR STRUCTURE WITH POLYGONAL ELEMENTS FOR TRUSSES, PARTICULARLY OF SELF-ASSEMBLING TOWER CRANES |
| FR2495275B1 (en) * | 1980-12-01 | 1986-02-07 | Lerc | MESH STRUCTURE, PARTICULARLY ANTENNA-SUPPORT |
| AT369479B (en) * | 1980-12-02 | 1983-01-10 | Hulek Anton | Lattice mast |
| FR2549885B1 (en) * | 1983-07-29 | 1986-01-24 | Thomson Csf | CONSTANT SECTION AUTOSTABLE PYLONE |
| DE3415265A1 (en) * | 1984-04-24 | 1985-10-31 | Hermann Steinweg GmbH & Co KG Baumaschinenfabrik, 4712 Werne | LIFT, ESPECIALLY CONSTRUCTION LIFT |
-
1988
- 1988-12-27 DE DE3843996A patent/DE3843996A1/en active Granted
-
1989
- 1989-12-21 EP EP89123687A patent/EP0376167B1/en not_active Expired - Lifetime
- 1989-12-21 AT AT89123687T patent/ATE86940T1/en not_active IP Right Cessation
- 1989-12-21 DE DE8989123687T patent/DE58903820D1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE58903820D1 (en) | 1993-04-22 |
| ATE86940T1 (en) | 1993-04-15 |
| DE3843996C2 (en) | 1993-09-09 |
| EP0376167A2 (en) | 1990-07-04 |
| DE3843996A1 (en) | 1990-06-28 |
| EP0376167A3 (en) | 1990-07-25 |
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