EP2210849B1 - Double chain hoist assembly - Google Patents

Double chain hoist assembly Download PDF

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Publication number
EP2210849B1
EP2210849B1 EP09015536A EP09015536A EP2210849B1 EP 2210849 B1 EP2210849 B1 EP 2210849B1 EP 09015536 A EP09015536 A EP 09015536A EP 09015536 A EP09015536 A EP 09015536A EP 2210849 B1 EP2210849 B1 EP 2210849B1
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EP
European Patent Office
Prior art keywords
chain
sprocket wheel
cross beam
beam section
sprocket
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Not-in-force
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EP09015536A
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German (de)
French (fr)
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EP2210849A1 (en
Inventor
Jürgen Kasper
Peter Kittsteiner
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Konecranes PLC
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Konecranes PLC
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Publication of EP2210849A1 publication Critical patent/EP2210849A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
    • B66C11/04—Underhung trolleys
    • B66C11/06—Underhung trolleys running on monorails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/16—Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C17/00—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports
    • B66C17/04—Overhead travelling cranes comprising one or more substantially horizontal girders the ends of which are directly supported by wheels or rollers running on tracks carried by spaced supports with lifting beams, e.g. slewable beams, carrying load-engaging elements, e.g. magnets, hooks

Definitions

  • chain hoists as so-called double chain hoists in which hang on a cross-beam two chain hoists. These two chain hoists are operated for synchronization reasons usually via a drive motor.
  • a disadvantage of such chain hoists is the fixed distance between the hooks, which may be too small or too large. In order to tune to the size of the load then traverses must be used again at the height of the hooks or pull ropes to increase or decrease the distance of the hooks according to the dimensions of the load.
  • US 5,893,471 A discloses a chain hoist arrangement with a crossmember with a controlled controlled along the crossmember first landing gear and along the crossmember freely movable second chassis.
  • Each landing gear has an individually extendable and retractable load chain, thereby vertically moving and tilting a load attached to both ends can be.
  • US 3,805,967 A discloses an arrangement with two mobile along a traverse chassis, each having two sheaves, between which a respective landing gear associated cable is guided over a hook attached to a further sheave hook.
  • the ropes of both carriages are wound up and unwound on a driven drum, whereby both load hooks are simultaneously moved vertically.
  • each chassis is movable along the traverse, the rope running through the sheaves through the chassis.
  • EP 0 147 487 A1 describes a lifting device for a set design, which has a plurality of along a guide rail movable carriage through which runs a guided over two pulleys and a load roller rope. While a simultaneous lifting and lowering is effected by winding or unwinding the multiple ropes on a common drum, the carriages remain movable relative to the guide rail and the cable. This allows their positions to be chosen so that an unbalanced load is distributed more evenly.
  • WO 2006/083231 A1 describes a movable arrangement with hoist for lifting containers. Two relatively movable trolleys can be adapted by a distance adjusting device to the male load.
  • US 3,999,672 A describes a vehicle with a boom for lifting elongated loads, on which two in the longitudinal direction of the boom movable bogies are arranged, each carrying a transversely aligned, vertically movable cross member for receiving the load.
  • US 2007/0095777 A1 discloses a gantry crane with two trusses, on each of which a main and an auxiliary landing gear with hoist are arranged movable. Both suspensions are synchronously moved by means of a rotating cable along the respective traverse, while the auxiliary landing gear further has its own drive, with which it can be moved relative to the cable and the main landing gear.
  • the hoists are equipped with a load limiter via a hydraulic system to prevent overloading of the trusses.
  • US 3 317 058 A discloses a gantry crane with a landing gear which is horizontally movable along a traverse and beyond the portal along a telescopic boom.
  • DE 10 2004 021 708 A1 discloses a crane track system with a cat, the chassis can be extended or shortened by an exchange or a change in length of a traverse by simple means.
  • the cat has a driven by a geared motor shaft with two chain nuts, on each of which runs a round link chain, which leads at one of the ends of the trolley via a Umlenkkettennuss down. Because in the area of the Umlenkkettennadore no further devices are required, the cat has a low height and allows a correspondingly extended stroke of the load.
  • the new double chain hoist has a traverse that can be adjusted in length.
  • the traverse is composed of a first and a second truss section, which are telescopically movable against each other.
  • Each truss section or Traversenteleskop Pacific has a distal or distal end, as well as a proximal or the other truss section facing the end.
  • a first chain nut group of two coaxial and non-rotatably connected chain nuts is provided. Furthermore, the first truss section is provided with a load chain fixed point next to the first sprocket group and a Verstellkettenfixtician. The first truss section is further associated with a first hook hook.
  • the second truss section has a second sprocket group, which is arranged axially parallel to the first sprocket group. This second chain nut group also has two coaxially arranged and non-rotatably connected chain nuts. This second chain nut group is located at the distal or distal end of the second truss section.
  • the second truss portion comprises two axially parallel adjacent Umlenkkettennadore for one of the load chains on which the second hook bottle hangs.
  • Another Umlenkkettennuss for an adjustment chain is located at the proximal or inner end of the second truss section.
  • Each of the two hook bottles is assigned its own load chain.
  • the first load chain travels from the first crawler group to the first hook block and from there to the load chain break point on the first truss section.
  • the other load chain leads from the first chain-nut group to the axially parallel chain nuts in the second truss section, from there to the hook block, from the hook block back over the other chain nut of this deflection group to the second chain nut group at the distal end of the second truss section.
  • An adjusting chain leads around the still free chain sprocket of the second chain nut group and the Umlenkkettennuss at the proximal end of the second truss section around. Their two free ends are anchored to Verstellkettenfixtician the first truss section.
  • each hook spacing can be set arbitrarily.
  • the adjustment is made by turning the second chain nut group in revolutions. As a result, the two truss sections are moved against each other. At the same time the second load chain is effectively shortened according to the adjustment.
  • the second chain nut group thus forms, as it were for the second load chain, a virtual fixed point, which picks up or releases chain according to the adjustment, so that the second Hook bottle remains independent of the adjustment at the same height that they had already held before the adjustment.
  • both hook bottles are at the same height. In certain applications, it may also be useful to adjust the heights against each other, this height adjustment is not affected by the adjustment of the truss width.
  • the chain nuts of the first chain nut group and the chain nuts of the second chain nut group may have the same number of chain pockets.
  • Each truss section may be provided near its distal end with a chassis, so that the double chain hoist is movable along a running rail.
  • the running rail can be the crane bridge of a bridge crane.
  • At least one of the trolleys can be provided with a motor. If appropriate, it is expedient to provide only one landing gear motor, so that the adjustment of the truss length is not hindered by the respective landing gear motor.
  • a braking device is expediently assigned to the second chain nut group. If a conventional drive is used to drive the second chain nut group, as it is also used for hoists in chain hoists, the braking device is already structurally contained in the drive system.
  • top and bottom or “front” and “back” and “left” and “right” refer to the normal position of use or the terminology for lifting equipment.
  • a double chain hoist 1 is illustrated.
  • the double chain hoist 1 has as main assemblies two carriages 2, 3, a length-adjustable cross member 4 and two hook bottles 5, 6 with hooks attached thereto.
  • the chassis 2 has two mutually parallel chassis shields 7a and 7b.
  • the chassis plate 7a carries two rotatably mounted flange wheels 8a and 8b.
  • Mirror images of the flange wheels 8a and 8b are on the opposite flange of the chassis plate 7b provided corresponding flange wheels.
  • the two chassis shields 7a and 7b are screwed on spacers 9a and 9b with corresponding tabs 11a and 11b by means of through bolts 12. Per chassis 2, the two shields 7a and 7b with two such sets of spacers 9a, 9b and screws 12 are secured to the cross member 7.
  • the structure of the chassis 3 corresponds to the design of the chassis 2, which makes a further explanation unnecessary.
  • One of the two carriages 2, 3, is also provided with a drive motor to drive one or the one pair of wheel flanges 8a, 8b in order to move the double chain hoist 1 along a crane bridge.
  • the traverse 4 is composed of two truss sections 13 and 14, which are telescopically adjustable against each other in the longitudinal direction.
  • the truss section 13 contains for this, as Fig. 2 can detect, extending in the cross-member longitudinal Z-shaped profile rail pieces 15, 16, each comprising a short leg or flange 17, a central portion 18 and an outwardly facing leg or flange 19.
  • the Z-profile rail pieces 15, 16 are arranged so that they form a downwardly open U. In the region of their short mutually facing legs 17, which extend horizontally, they are connected to one another by corresponding fastening plates 20 in the region of the chassis 2.
  • the two Z-profile rail pieces 15, 16 are parallel to constant
  • the two Z-profile rail pieces 15, 16 are connected at one end via the chassis 2 and at the other end by a plate corresponding to the plate 20.
  • the truss section 14 form two parallel spaced-apart U-profile rail pieces 21, 22, according to Fig. 2 are arranged.
  • Each U-profile rail piece 21, 22 is composed of two mutually parallel short legs 23, 24 and a back portion 25 together.
  • the back portions 25 are facing each other.
  • the U-profile rail pieces 21, 22 are connected in a similar manner as the Z-profile rail pieces 15, 16.
  • the type of connection is known in the art and therefore need not be further explained at this point.
  • the slidable connection between the truss portion 13 and the truss portion 14 is achieved with groups of deep groove ball bearings 29, 30 which sit on rigid axles 31, 32.
  • the rigid axles 31, 32 are, as shown, connected to the center piece 18 of the Z-profile rail piece 16 and are perpendicular to this.
  • the two deep groove ball bearings 29, 30 are arranged one above the other at a distance from each other, in such a way that they bear against the inside of the short legs 23, 24 of the U-profile rail piece 21.
  • Mirror images of the deep groove ball bearings 29, 30 on the left side are on the other side, the right side, also arranged one above the other deep groove ball bearings, which cooperate with the U-profile rail piece 22.
  • Fig. 3 shows in a schematic representation of the chain course within the double chain hoist 1, wherein only the chain nuts are illustrated, while all support members are omitted for holding the chain nuts.
  • the double chain hoist 1 has according to Fig. 3 two load chains 35, 36 and an adjustment chain 37. All chains 35, 36, 37 are round link chains and have the same geometry.
  • a drive motor 38 on the transmission output shaft two chain sprocket 39 forming chain nuts sit.
  • the pancakes belonging to the sprocket group 39 are, as the schematic drawing of Fig. 3 can recognize, arranged coaxially and rotatably connected to each other. They have the same number of pockets. For reasons of space, this chain nut group 39 is located slightly below the traverse 4.
  • two loose Umlenkkettennadore 40 and 41 are rotatably mounted in the truss section 13.
  • the two chain nuts 40 and 41 are arranged coaxially with each other, but independently rotatable.
  • the load chain 35 which is driven via the sprocket group 39, leads from the associated sprocket of the sprocket group 39 to the Umlenknuss 40 and from here vertically down to the hook bottle 5. Starting from the hook bottle 5, the load chain 35 leads back up to the Traversal section 13. Its free end is anchored to a chain fixing point 42 on the underside of the truss section 13.
  • the load chain 36 leads from the other of the two chain nuts of the sprocket group 39 via the Umlenkkettennuss 41 in the space between the two U-profile rail pieces 21 and 22 in the truss section 14. Below the chassis 3 are parallel to the axis and at a distance to each other in the truss section 14 two Umlenkkettennadore 42 and 43 rotatably mounted.
  • the load chain 36 leads from the Umlenkkettennuss 41 coming to the Umlenkkettennuss 42 around down from the truss section 14 out.
  • the chain nut group 44 has two mutually coaxial and non-rotatably connected chain nuts. Chain nuts of the chain nut group 44 have the same number of chain pockets. Preferably the same number as the Kettennusscade 39. However, this is not necessary.
  • the chain nut group 44 is located next to the chassis 3.
  • the load chain 36 is additionally on the loose rotatable sprocket 28 on.
  • the sprocket 28 is in Fig. 3 not shown for reasons of clarity. It is located between the sprocket group 39 and the Umlenkkettenuss 42 at the distal end of the truss portion 14th
  • the sprocket assembly 44 sits on the output shaft of a geared motor 45 which is internally provided with a braking device, as is typical for chain hoists.
  • the braking device therefore need not be further explained at this point.
  • the Kettennussucc 44 acts as a chain fix point for the load chain 36.
  • the two load chains 35 and 36 are moved synchronously by the same displacement. Since the free ends of the two load chains are fixed to the fixed point 42 or the chain nut group 44, the two hook bottles 5, 6 move in the same direction and in terms of amount by the same stroke. Both hook bottles 5, 6 can apply the same force.
  • the adjusting chain 37 is attached at one end to a fixed point 48, which sits on the truss section 13 at its distal end and projects between the two U-profile rails 21, 22 of the truss section 14. From this fixed point 48, the adjustment chain leads to the Umlenkkettennuss 27, which at the distal end of the truss portion 14, as in Fig. 2 shown, between the two U-profile rails 21, 22 is freely rotatably mounted. After a 180 ° deflection around the sprocket 27, the adjusting chain 37 runs to the associated sprocket of the sprocket group 44 and around it back to the fixed point 48th
  • the double chain hoist 1 assumes a position as in Fig. 3 is drawn schematically. If, in this position, the chain nut group 44 is moved in the clockwise direction, as discussed above, the fixed point 48 is used for the chassis 3, ie the hook block 5 below the chassis 2, the existing there about the fixed point 42 and the Umlenkkettennuss 40 with the truss section 13th As a result of this movement, the chain piece of the load chain 36 between the Umlenkkettennuss 41 and the Umlenkkettennuss 42 would be too long per se.
  • the sprocket assembly 44 carries a second sprocket for the load chain 36, as the two 13, 14 approach, the double chain sprocket 44 clears the excess portion of the load chain 36 by the traverse and across the double chain sprocket 44 transported.
  • the load chain 36 through the hook bottle 6 through, which leads to the fact that ultimately the hook bottle 6 remains at the height shown, regardless of how the distance between the hook bottles 5, 6 is set.
  • the sprocket group 44 has two chain nuts, namely one for the adjusting chain 37 and one for the load chain 36. To achieve the operating condition it is sufficient if these two chain nuts have the same number of chain pockets.
  • the sprocket group 44 must by no means coincide with the sprocket group 39 with regard to the chain pockets per sprocket. For manufacturing reasons, however, it is advantageous if both Kettennuss phenomenon are identical.
  • the force acts in the opposite direction due to the torque introduced, ie a torque of the chain nut group 44 in the counterclockwise direction sets the lower run of the adjusting chain 37 under tension, so that the adjusting chain 37 endeavors the fixed point 48 away from the chain nut group 44 to draw.
  • the longitudinal forces cancel each other out in the area of the sprocket group 44 and it suffices to provide a drive for the drive of this sprocket group, which is only able to apply the adjustment forces and which has a low braking effect, thus not by asymmetries as a result of friction, an undesirable adjustment comes about.
  • Fig. 4 shows the left-side end of the double chain hoist 1.
  • the illustration is cut along the vertical center plane parallel to the traverse 4.
  • the sprocket 40 As can be seen sitting on one between the Z-profile rails 15 and 16 on a content Erten therebetween axis 51, the sprocket 40.
  • the other sprocket 41 is not visible because of the sectional view.
  • the sprocket 40 is partially surrounded by a chain guide member 52 which is secured to the leg 18 of the Z-profile rail 15.
  • a chain guide plate 52 which includes flush with the trays of the load chain 35 aligned openings 53 and 54.
  • the drive 38 comprises a drive motor 56 which drives a transmission output shaft 57 via a transmission.
  • the two belonging to the sprocket group 39 chain nuts.
  • the chain sprocket 58 which is at the rear from the viewing side, can be seen around which the load chain 35 guides.
  • the sprocket group 39 is surrounded by a sprocket housing 59, the corresponding chain guide channels 59 for the contains two load chains 35 and 36.
  • the chain guide channel 60 of the load chain 35 as the figure can be seen, obliquely downwards.
  • a chain storage pocket 61 Below the mouth of the chain guide channel 60 is a chain storage pocket 61.
  • a further chain storage pocket corresponding to the chain storage pocket 61 would be conceivable above the drawing plane, as would the chain nut belonging to the load chain 36, the chain nut group 39.
  • the other end of the chain guide channel 60 is arranged so that the chain without kink of the sprocket 57 leads to the Umlenkkettennuss 40.
  • the free end of the load chain 35 is anchored in the plate 52 in the opening 53. This opening simultaneously forms the fixation point 42.
  • Fig. 5 shows a plan view of the right end of the double chain hoist 1, and cut approximately at the level of the axis of the guide ball bearings 29.
  • the two Umlenkkettennadore 42 and 43 In the gap between these chain nuts the load chain 36 dives down perpendicular to the plane, while the adjustment chain 37 laterally beside the two chain nuts 42 and 43 passes.
  • the drive motor 45 At the right free end of the drive motor 45 is seated on the transmission output shaft 65 sitting next to each other rotatably two chain nuts 66 and 67, which form the Kettennusslui 44.
  • a double chain hoist has a telescopically extendable and collapsible traverse, with load chains leading to hook hooks below them, near the ends of the two telescopic pieces belonging to the traverse.
  • the chain for varying the length of the traverse runs over a sprocket with the rotatably connected to another sprocket nut, which serves as the fixed point for that load chain for the hook bottle of the relevant Traversenteleskop ceremoniess.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Transmission Devices (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Automatic Tool Replacement In Machine Tools (AREA)
  • Jib Cranes (AREA)

Abstract

The hoist assembly has a load chain (35) guided from a chain sprocket group (39) to a hook block (5) and to a load chain fixing point. Another load chain (36) is guided from the group to a deflection chain sprocket (42) and to another hook block (6) and from the later block to another chain sprocket group (44) by another deflection chain sprocket (43). An adjusting chain (38) is passed around the latter sprocket group and a third deflection chain sprocket (27) at adjacent ends of a transverse section. Ends of the adjusting chain are attached to an adjusting chain fixing point (48).

Description

Weit ausladende Lasten oder knickempfindliche Lasten können nicht mit einem einzigen Haken und Gurtbändern angehoben werden. Solche Lasten erfordern das Anhängen an eine Traverse von der Gurtbänder oder sonstige Lastaufnahmemittel herabhängen um die Last aufzunehmen. Dieses Verfahren ist weit verbreitet, hat aber den Nachteil, dass die Traverse, je nach Abmessungen der Last, gegen eine andere Traverse ausgetauscht werden muss.Wide-spreading loads or kink-sensitive loads can not be lifted with a single hook and straps. Such loads require attaching to a cross member from the straps or other load suspension devices hang down to pick up the load. This method is widely used, but has the disadvantage that the traverse, depending on the dimensions of the load, must be replaced with another traverse.

Alternativ ist es auch bekannt, Kettenzüge als so genannte Doppelkettenzüge auszuführen, bei denen an einer Traverse zwei Kettenzüge hängen. Diese beiden Kettenzüge werden aus Synchronisationsgründen in der Regel über einen Antriebsmotor betätigt.Alternatively, it is also known to perform chain hoists as so-called double chain hoists in which hang on a cross-beam two chain hoists. These two chain hoists are operated for synchronization reasons usually via a drive motor.

Nachteilig bei solchen Kettenzügen ist der fixe Abstand zwischen den Haken, der zu klein oder zu groß sein kann. Zwecks Abstimmung auf die Größe der Last müssen dann auf der Höhe der Haken wiederum Traversen eingesetzt werden oder Zugseile um den Abstand der Haken zu vergrößern oder zu verkleinern entsprechend den Abmessungen der Last.A disadvantage of such chain hoists is the fixed distance between the hooks, which may be too small or too large. In order to tune to the size of the load then traverses must be used again at the height of the hooks or pull ropes to increase or decrease the distance of the hooks according to the dimensions of the load.

US 5 893 471 A offenbart eine Kettenzuganordnung mit einer Traverse mit einem entlang der Traverse gesteuert verfahrbaren ersten Fahrwerk und einem entlang der Traverse frei beweglichen zweiten Fahrwerk. Jedes Fahrwerk weist eine individuell ein- und ausfahrbare Lastkette auf, wodurch eine an beiden Enden angebrachte Last vertikal bewegt und gekippt werden kann. US 5,893,471 A discloses a chain hoist arrangement with a crossmember with a controlled controlled along the crossmember first landing gear and along the crossmember freely movable second chassis. Each landing gear has an individually extendable and retractable load chain, thereby vertically moving and tilting a load attached to both ends can be.

US 3 805 967 A offenbart eine Anordnung mit zwei entlang einer Traverse beweglichen Fahrwerken, die jeweils zwei Seilscheiben aufweisen, zwischen denen ein dem jeweiligen Fahrwerk zugeordnetes Seil über einen an einer weiteren Seilscheibe befestigten Lasthaken geführt ist. Die Seile beider Fahrwerke werden auf einer angetriebenen Trommel auf- und abgewickelt, wodurch beide Lasthaken simultan vertikal bewegt werden. Bei beliebiger Höhe des Lasthakens ist jedes Fahrwerk entlang der Traverse beweglich, wobei das Seil über die Seilscheiben durch das Fahrwerk hindurch läuft. US 3,805,967 A discloses an arrangement with two mobile along a traverse chassis, each having two sheaves, between which a respective landing gear associated cable is guided over a hook attached to a further sheave hook. The ropes of both carriages are wound up and unwound on a driven drum, whereby both load hooks are simultaneously moved vertically. At any height of the load hook, each chassis is movable along the traverse, the rope running through the sheaves through the chassis.

EP 0 147 487 A1 beschreibt eine Hebevorrichtung für ein Bühnenbild, die mehrere entlang einer Führungsschiene bewegliche Schlitten aufweist, durch die jeweils ein über zwei Umlenkrollen und eine Lastrolle geführtes Seil läuft. Während ein simultanes Heben und Senken durch ein Auf- bzw. Abwickeln der mehreren Seile an einer gemeinsamen Trommel bewirkt wird, bleiben die Schlitten gegenüber der Führungsschiene und dem Seil beweglich. Dadurch können ihre Positionen so gewählt werden, dass eine unsymmetrische Last gleichmäßiger verteilt wird. EP 0 147 487 A1 describes a lifting device for a set design, which has a plurality of along a guide rail movable carriage through which runs a guided over two pulleys and a load roller rope. While a simultaneous lifting and lowering is effected by winding or unwinding the multiple ropes on a common drum, the carriages remain movable relative to the guide rail and the cable. This allows their positions to be chosen so that an unbalanced load is distributed more evenly.

WO 2006/083231 A1 beschreibt eine verfahrbare Anordnung mit Hebezeug zum Heben von Containern. Zwei relativ zueinander bewegliche Fahrwerke können durch eine Abstandseinstellungseinrichtung an die aufzunehmende Last angepasst werden. WO 2006/083231 A1 describes a movable arrangement with hoist for lifting containers. Two relatively movable trolleys can be adapted by a distance adjusting device to the male load.

US 3 999 672 A beschreibt ein Fahrzeug mit einem Ausleger zum Heben länglicher Lasten, an dem zwei in Längsrichtung des Auslegers bewegliche Fahrwerke angeordnet sind, die jeweils eine quer dazu ausgerichtete, vertikal bewegliche Traverse zur Aufnahme der Last tragen. US 3,999,672 A. describes a vehicle with a boom for lifting elongated loads, on which two in the longitudinal direction of the boom movable bogies are arranged, each carrying a transversely aligned, vertically movable cross member for receiving the load.

US 2007/0095777 A1 offenbart einen Portalkran mit zwei Traversen, an denen jeweils ein Haupt- und ein Hilfsfahrwerk mit Hebezeug verfahrbar angeordnet sind. Beide Fahrwerke werden mittels eines umlaufenden Seilzuges synchron entlang der jeweiligen Traverse bewegt, während das Hilfsfahrwerk ferner einen eigenen Antrieb aufweist, mit dem es relativ zum Seilzug und zum Hauptfahrwerk verfahren werden kann. Die Hebezeuge sind über ein hydraulisches System mit einer Lastbegrenzung ausgerüstet, um eine Überlastung der Traversen zu verhindern. US 2007/0095777 A1 discloses a gantry crane with two trusses, on each of which a main and an auxiliary landing gear with hoist are arranged movable. Both suspensions are synchronously moved by means of a rotating cable along the respective traverse, while the auxiliary landing gear further has its own drive, with which it can be moved relative to the cable and the main landing gear. The hoists are equipped with a load limiter via a hydraulic system to prevent overloading of the trusses.

US 3 317 058 A offenbart einen Portalkran mit einem Fahrwerk, das horizontal entlang einer Traverse und über das Portal hinaus entlang eines Teleskopauslegers verfahrbar ist. US 3 317 058 A discloses a gantry crane with a landing gear which is horizontally movable along a traverse and beyond the portal along a telescopic boom.

DE 10 2004 021 708 A1 offenbart eine Kranbahnanlage mit einer Katze, deren Fahrwerk durch einen Austausch oder eine Längenänderung einer Traverse mit einfachen Mitteln verlängert oder verkürzt werden kann. Die Katze weist eine von einem Getriebemotor angetriebene Welle mit zwei Kettennüssen auf, über die jeweils eine Rundgliederkette läuft, die an einem der Enden des Katzfahrwerks über eine Umlenkkettennuss nach unten führt. Da im Bereich der Umlenkkettennüsse keine weiteren Vorrichtungen erforderlich sind, weist die Katze eine geringe Bauhöhe auf und ermöglicht einen entsprechend verlängerten Hubweg der Last. DE 10 2004 021 708 A1 discloses a crane track system with a cat, the chassis can be extended or shortened by an exchange or a change in length of a traverse by simple means. The cat has a driven by a geared motor shaft with two chain nuts, on each of which runs a round link chain, which leads at one of the ends of the trolley via a Umlenkkettennuss down. Because in the area of the Umlenkkettennüsse no further devices are required, the cat has a low height and allows a correspondingly extended stroke of the load.

Ein weiterer Nachteil bei solchen Doppelkettenzügen ergibt sich aus dem Anfahrmaß, d.h. dem kleinsten Abstand, den der Haken von einer Gebäudewand haben kann, wenn der Doppelkettenzug in Richtung Wand verfahren ist. Werden die Haken durch entsprechende Maßnahmen aufeinander zu gezogen vergrößert sich deutlich das Anfahrmaß.Another disadvantage of such double chain hoists results from the Anfahrmaß, ie the smallest distance that can have the hook of a building wall when the double chain hoist is moved in the direction of the wall. If the hooks are pulled toward each other by appropriate measures clearly the starting dimension.

Ausgehend hiervon ist es Aufgabe der Erfindung einen Doppelkettenzug zu schaffen, bei dem der Hakenabstand variabel ist, wobei das Anfahrmaß konstant bleibt.Based on this, it is an object of the invention to provide a double chain, in which the hook spacing is variable, the Anfahrmaß remains constant.

Diese Aufgabe wird erfindungsgemäß durch einen Doppelkettenzug mit den Merkmalen des Anspruches 1 gelöst.This object is achieved by a double chain with the features of claim 1.

Der neue Doppelkettenzug verfügt über eine in der Länge verstellbare Traverse. Die Traverse setzt sich aus einem ersten und einem zweiten Traversenabschnitt zusammen, die teleskopartig gegeneinander bewegbar sind. Jeder Traversenabschnitt oder Traversenteleskopstück weist ein distales oder abliegendes Ende auf, sowie ein proximales oder dem anderen Traversenabschnitt zugekehrtes Ende.The new double chain hoist has a traverse that can be adjusted in length. The traverse is composed of a first and a second truss section, which are telescopically movable against each other. Each truss section or Traversenteleskopstück has a distal or distal end, as well as a proximal or the other truss section facing the end.

Neben dem distalen Ende des ersten Traversenabschnittes ist eine erste Kettennussgruppe aus zwei koaxialen und drehfest miteinander verbundenen Kettennüssen vorgesehen. Ferner ist der erste Traversenabschnitt mit einem Lastkettenfixpunkt neben der ersten Kettennussgruppe sowie einen Verstellkettenfixpunkt versehen. Dem ersten Traversenabschnitt ist ferner eine erste Hakenflasche zugeordnet. Der zweite Traversenabschnitt verfügt über eine zweite Kettennussgruppe, die achsparallel zu der ersten Kettennussgruppe angeordnet ist. Auch diese zweite Kettennussgruppe weist zwei koaxial angeordnete und drehfest miteinander verbundene Kettennüsse auf. Diese zweite Kettennussgruppe befindet sich am distalen oder abliegenden Ende des zweiten Traversenabschnitts. Außerdem umfasst der zweite Traversenabschnitt zwei achsparallel nebeneinander liegende Umlenkkettennüsse für eine der Lastketten, an der die zweite Hakenflasche hängt. Eine weitere Umlenkkettennuss für eine Verstellkette befindet sich am proximalen oder inneren Ende des zweiten Traversenabschnitts.In addition to the distal end of the first truss section, a first chain nut group of two coaxial and non-rotatably connected chain nuts is provided. Furthermore, the first truss section is provided with a load chain fixed point next to the first sprocket group and a Verstellkettenfixpunkt. The first truss section is further associated with a first hook hook. The second truss section has a second sprocket group, which is arranged axially parallel to the first sprocket group. This second chain nut group also has two coaxially arranged and non-rotatably connected chain nuts. This second chain nut group is located at the distal or distal end of the second truss section. In addition, the second truss portion comprises two axially parallel adjacent Umlenkkettennüsse for one of the load chains on which the second hook bottle hangs. Another Umlenkkettennuss for an adjustment chain is located at the proximal or inner end of the second truss section.

Jedem der beiden Hakenflaschen ist eine eigene Lastkette zugeordnet. Die erste Lastkette läuft von der ersten Kettennussgruppe zu der ersten Hakenflasche und von dort zu dem Lastkettenfixpunkt an dem ersten Traversenabschnitt. Die andere Lastkette führt von der ersten Kettennussgruppe zu den achsparallelen Kettennüssen in dem zweiten Traversenabschnitt, von dort zu der Hakenflasche, von der Hakenflasche zurück über die andere Kettennuss dieser Umlenkgruppe zu der zweiten Kettennussgruppe am distalen Ende des zweiten Traversenabschnittes.Each of the two hook bottles is assigned its own load chain. The first load chain travels from the first crawler group to the first hook block and from there to the load chain break point on the first truss section. The other load chain leads from the first chain-nut group to the axially parallel chain nuts in the second truss section, from there to the hook block, from the hook block back over the other chain nut of this deflection group to the second chain nut group at the distal end of the second truss section.

Ein Verstellkette führt um die noch freie Kettennuss der zweiten Kettennussgruppe sowie die Umlenkkettennuss am proximalen Ende des zweiten Traversenabschnittes herum. Ihre beiden freien Enden sind am Verstellkettenfixpunkt des ersten Traversenabschnitts verankert.An adjusting chain leads around the still free chain sprocket of the second chain nut group and the Umlenkkettennuss at the proximal end of the second truss section around. Their two free ends are anchored to Verstellkettenfixpunkt the first truss section.

Da die beiden Traversenabschnitte teleskopartig verstellbar sind, können, je nach Anwendungsfall die Hakenflaschen aufeinander zu oder voneinander weg bewegt werden. Innerhalb des möglichen Verstellhubs lässt sich somit jeder Hakenabstand beliebig einstellen. Die Einstellung geschieht, indem die zweite Kettennussgruppe in Umdrehungen versetzt wird. Hierdurch werden die beiden Traversenabschnitte gegeneinander bewegt. Gleichzeitig wird die zweite Lastkette entsprechend der Verstellbewegung effektiv verkürzt. Die zweite Kettennussgruppe bildet somit gleichsam für die zweite Lastkette einen virtuellen Fixpunkt, der entsprechend der Verstellung Kette aufnimmt oder abgibt, damit die zweite Hakenflasche unabhängig von der Verstellung auf derselben Höhe bleibt, die sie vor der Verstellung bereits inne hatte. In der Regel liegen beide Hakenflaschen auf gleicher Höhe. Bei bestimmten Anwendungen kann es aber auch sinnvoll sein die Höhen gegeneinander zu verstellen, wobei diese Höheneinstellung durch das Verstellen der Traversenbreite nicht beeinflusst wird.Since the two truss sections are telescopically adjustable, depending on the application, the hook bottles can be moved toward or away from each other. Within the possible Verstellhubs thus each hook spacing can be set arbitrarily. The adjustment is made by turning the second chain nut group in revolutions. As a result, the two truss sections are moved against each other. At the same time the second load chain is effectively shortened according to the adjustment. The second chain nut group thus forms, as it were for the second load chain, a virtual fixed point, which picks up or releases chain according to the adjustment, so that the second Hook bottle remains independent of the adjustment at the same height that they had already held before the adjustment. As a rule, both hook bottles are at the same height. In certain applications, it may also be useful to adjust the heights against each other, this height adjustment is not affected by the adjustment of the truss width.

Eine genaue Betrachtung der Kräfte zeigt, dass die Kraft in der zweiten Lastkette genauso groß ist wie die Kraft in der Verstellkette. Beide Kettenkräfte haben jedoch entgegengesetztes Vorzeichen, womit schlussendlich die zweite Kettennussgruppe nach außen praktisch drehmomentfrei ist. Es kann deswegen zum Verstellen der Traversenlänge eine Antriebseinrichtung verwendet werden, die hinsichtlich des erbrachen Drehmomentes wesentlich schwächer dimensioniert ist, als die Antriebseinrichtung für die erste Kettennussgruppe.A close examination of the forces shows that the force in the second load chain is the same as the force in the adjustment chain. Both chain forces, however, have opposite signs, so that finally the second chain nut group is virtually torque-free to the outside. It can therefore be used to adjust the truss length a drive device which is dimensioned substantially weaker in terms of vomiting torque, as the drive means for the first chain nut group.

Die Kettenüsse der ersten Kettennussgruppe und die Kettennüsse der zweiten Kettennussgruppe können dieselbe Anzahl von Kettentaschen aufweisen.The chain nuts of the first chain nut group and the chain nuts of the second chain nut group may have the same number of chain pockets.

Zweckmäßig ist es, wenn lediglich die Kettennüsse innerhalb einer Kettennussgruppe dieselbe Anzahl von Kettentaschen aufweisen, damit die über die jeweilige Kettennussgruppe laufende Kette oder das entsprechende Trum der Kette mit der gleichen Geschwindigkeit läuft.It is expedient if only the chain nuts within a chain-nut group have the same number of chain pockets so that the chain running over the respective chain-nut group or the corresponding run of the chain runs at the same speed.

Um ein Verheddern der Leertrumme der Lastketten zu verhindern ist es zweckmäßig, wenn neben der ersten Kettennussgruppe zwei Kettenspeichertaschen vorgesehen sind.In order to prevent tangling of the empty trimmings of the load chains, it is expedient if two chain storage pockets are provided in addition to the first chain nut group.

Jeder Traversenabschnitt kann in der Nähe seines distalen Endes mit einem Fahrwerk versehen sein, so dass der Doppelkettenzug längs einer Fahrschiene verfahrbar ist. Die Fahrschiene kann die Kranbrücke eines Brückenkrans sein.Each truss section may be provided near its distal end with a chassis, so that the double chain hoist is movable along a running rail. The running rail can be the crane bridge of a bridge crane.

Wenigstens eines der Fahrwerke kann mit einem Motor versehen sein. Gegebenenfalls ist es zweckmäßig tatsächlich nur einen Fahrwerkmotor vorzusehen, damit die Verstellung der Traversenlänge nicht durch den betreffenden Fahrwerksmotor behindert wird.At least one of the trolleys can be provided with a motor. If appropriate, it is expedient to provide only one landing gear motor, so that the adjustment of the truss length is not hindered by the respective landing gear motor.

Um die Einstellung zu fixieren ist zweckmäßigerweise der zweiten Kettennussgruppe eine Bremseinrichtung zugeordnet. Wenn zum Antrieb der zweiten Kettennussgruppe ein üblicher Antrieb verwendet wird, wie er auch für Hubwerke bei Kettenzügen zum Einsatz kommt, ist die Bremseinrichtung bereits konstruktiv in dem Antriebssystem enthalten.In order to fix the setting, a braking device is expediently assigned to the second chain nut group. If a conventional drive is used to drive the second chain nut group, as it is also used for hoists in chain hoists, the braking device is already structurally contained in the drive system.

Im Übrigen sind Weiterbildungen der Erfindung Gegenstand von Unteransprüchen. Die nachfolgende Figurenbeschreibung erläutert Aspekte zum Verständnis der Erfindung, weitere, nicht beschriebene Details kann der Fachmann in gewohnter Weise den Figuren entnehmen, die insoweit die Figurenbeschreibung ergänzen. Es ist klar, dass eine Reihe von Abwandlungen und Kombinationen möglich sind.Incidentally, developments of the invention are the subject of subclaims. The following description of the figures explains aspects for the understanding of the invention, further, not described details, the expert can refer to the figures in the usual way, the extent to complement the description of the figures. It is clear that a number of modifications and combinations are possible.

Die nachfolgenden Figuren sind nicht unbedingt maßstäblich. Zur Veranschaulichung von Details können möglicherweise bestimmte Bereiche übertrieben groß dargestellt sein darüber hinaus sind die Zeichnungen plakativ vereinfacht und enthalten nicht jedes bei der praktischen Ausführung gegebenenfalls vorhandene Detail. Die Begriffe "oben" und "unten" bzw. "vorne" und "hinten" sowie "links" und "rechts" beziehen sich auf die normale Gebrauchslage bzw. die Terminologie bei Hebezeugen.The following figures are not necessarily to scale. To illustrate details, certain areas may be exaggerated in size, moreover, the drawings are simplistically simplified and do not include every detail that may be present in the practice. The terms "top" and "bottom" or "front" and "back" and "left" and "right" refer to the normal position of use or the terminology for lifting equipment.

In der Zeichnung ist ein Ausführungsbeispiel des Gegenstandes der Erfindung dargestellt.

Fig. 1
zeigt in einer vereinfachten perspektivischen und teilweise aufgebrochenen Ansicht einen erfin- dungsgemäßen Doppelkettenzug.
Fig. 2
zeigt einen Querschnitt durch die Traversenanord- nung des Doppelkettenzugs nach Fig. 1.
Fig. 3
zeigt, stark schematisiert, den Verlauf der ein- zelnen Ketten über die Ketten- und Umlenknüsse.
Fig. 4
veranschaulicht in einer geschnittenen Seiten- ansicht, das, bezogen auf Fig. 1, linke Ende des Doppelkettenzugs.
Fig. 5
zeigt einen Blick von oben auf das rechte Ende des Doppelkettenzugs nach Fig. 1.
In the drawing, an embodiment of the object of the invention is shown.
Fig. 1
shows in a simplified perspective and partially broken view of an inventive double chain hoist.
Fig. 2
shows a cross section through the truss arrangement of the double chain hoist Fig. 1 ,
Fig. 3
shows, highly schematized, the course of the individual chains over the chain and deflection nuts.
Fig. 4
illustrated in a sectional side view, which, based on Fig. 1 , left end of the double chain hoist.
Fig. 5
shows a view from above on the right end of the double chain hoist Fig. 1 ,

In Fig. 1 ist ein Doppelkettenzug 1 veranschaulicht. Der Doppelkettenzug 1 weist als Hauptbaugruppen zwei Fahrwerke 2, 3, eine längenverstellbare Traverse 4 sowie zwei Hakenflaschen 5, 6 mit daran befestigten Haken auf.In Fig. 1 a double chain hoist 1 is illustrated. The double chain hoist 1 has as main assemblies two carriages 2, 3, a length-adjustable cross member 4 and two hook bottles 5, 6 with hooks attached thereto.

Wie die Zusammenschau aus den Fig. 1 und 2 erkennen lässt, weist das Fahrwerk 2 zwei parallel zueinander ausgerichtete Fahrwerksschilde 7a und 7b auf. Das Fahrwerksschild 7a trägt zwei drehbar gelagerte Spurkranzräder 8a und 8b. Spiegelbildlich zu den Spurkranzrädern 8a und 8b sind auf der gegenüberliegenden Innenseite des Fahrwerkschildes 7b korrespondierende Spurkranzräder vorgesehen.Like the synopsis of the Fig. 1 and 2 can recognize, the chassis 2 has two mutually parallel chassis shields 7a and 7b. The chassis plate 7a carries two rotatably mounted flange wheels 8a and 8b. Mirror images of the flange wheels 8a and 8b are on the opposite flange of the chassis plate 7b provided corresponding flange wheels.

Die beiden Fahrwerksschilde 7a und 7b sind über Distanzstücke 9a und 9b mit entsprechenden Laschen 11a und 11b mit Hilfe von Durchgangsschrauben 12 verschraubt. Pro Fahrwerk 2 sind die beiden Schilde 7a und 7b mit zwei derartigen Sätzen von Distanzstücken 9a, 9b und Schrauben 12 an der Traverse 7 befestigt.The two chassis shields 7a and 7b are screwed on spacers 9a and 9b with corresponding tabs 11a and 11b by means of through bolts 12. Per chassis 2, the two shields 7a and 7b with two such sets of spacers 9a, 9b and screws 12 are secured to the cross member 7.

Der Aufbau des Fahrwerks 3 entspricht der Ausführung des Fahrwerks 2, womit sich eine erneute Erläuterung erübrigt.The structure of the chassis 3 corresponds to the design of the chassis 2, which makes a further explanation unnecessary.

Eines der beiden Fahrwerke 2, 3, ist außerdem mit einem Antriebsmotor versehen, um eines oder das eine Paar der Spurkranzräder 8a, 8b anzutreiben, um den Doppelkettenzug 1 längs einer Kranbrücke verfahren zu können.One of the two carriages 2, 3, is also provided with a drive motor to drive one or the one pair of wheel flanges 8a, 8b in order to move the double chain hoist 1 along a crane bridge.

Die Traverse 4 setzt sich aus zwei Traversenabschnitten 13 und 14 zusammen, die teleskopartig gegeneinander in Längrichtung verstellbar sind.The traverse 4 is composed of two truss sections 13 and 14, which are telescopically adjustable against each other in the longitudinal direction.

Der Traversenabschnitt 13 enthält hierzu, wie Fig. 2 erkennen lässt, zwei in Traversenlängsrichtung verlaufende Z-förmige Profilschienenstücke 15, 16 auf, die jeweils einen kurzen Schenkel oder Flansch 17, einen Mittelabschnitt 18 und einen nach außen zeigenden Schenkel oder Flansch 19 umfassen. Die Z-Profilschienenstücke 15, 16 sind so angeordnet, dass sie ein nach unten offenes U bilden. Im Bereich ihrer kurzen einander zugekehrten Schenkel 17, die horizontal verlaufen, sind sie durch entsprechende Befestigungsplatten 20 im Bereich des Fahrwerks 2 miteinander verbunden. Die beiden Z-Profilschienenstücke 15, 16 liegen parallel mit konstantemThe truss section 13 contains for this, as Fig. 2 can detect, extending in the cross-member longitudinal Z-shaped profile rail pieces 15, 16, each comprising a short leg or flange 17, a central portion 18 and an outwardly facing leg or flange 19. The Z-profile rail pieces 15, 16 are arranged so that they form a downwardly open U. In the region of their short mutually facing legs 17, which extend horizontally, they are connected to one another by corresponding fastening plates 20 in the region of the chassis 2. The two Z-profile rail pieces 15, 16 are parallel to constant

Abstand zueinander. Die unteren Flansche 17, 19 liegen in einer gemeinsamen horizontalen EbeneDistance from each other. The lower flanges 17, 19 lie in a common horizontal plane

Somit sind die beiden Z-Profilschienenstücke 15, 16 an einem Ende über das Fahrgestell 2 verbunden und am anderen Ende durch eine Platte, die der Platte 20 entspricht.Thus, the two Z-profile rail pieces 15, 16 are connected at one end via the chassis 2 and at the other end by a plate corresponding to the plate 20.

Den Traversenabschnitt 14 bilden zwei parallel im Abstand zueinander verlaufende U-Profilschienenstücke 21, 22 auf, die gemäß Fig. 2 angeordnet sind.The truss section 14 form two parallel spaced-apart U-profile rail pieces 21, 22, according to Fig. 2 are arranged.

Jedes U-Profilschienenstück 21, 22 setzt sich aus zwei zueinander parallelen kurzen Schenkeln 23, 24 und einem Rückenabschnitt 25 zusammen. Die Rückenabschnitte 25 sind einander zugekehrt.Each U-profile rail piece 21, 22 is composed of two mutually parallel short legs 23, 24 and a back portion 25 together. The back portions 25 are facing each other.

Im Bereich des Fahrwerkes 3 sind die U-Profilschienenstücke 21, 22 in ähnlicher Weise verbunden, wie die Z-Profilschienenstücke 15, 16. Die Art der Verbindung ist dem Fachmann bekannt und braucht deswegen an dieser Stelle nicht weiter erläutert zu werden.In the area of the chassis 3, the U-profile rail pieces 21, 22 are connected in a similar manner as the Z-profile rail pieces 15, 16. The type of connection is known in the art and therefore need not be further explained at this point.

Am von dem Fahrwerk 3 entfernt liegenden, bezogen auf den Doppelkettenzug 1 proximalen Ende sind die beiden U-Profilschienenstücke 21, 22 durch eine Achse 26 miteinander verbunden, auf der frei drehbar zwei Kettennüsse 27 und 28 angeordnet sind. Zusätzlich kann neben den Kettennüssen 27, 28 noch ein starres Verbindungsstück eingefügt sein.At the remote from the chassis 3, based on the double chain 1 proximal end of the two U-profile rail pieces 21, 22 are interconnected by an axis 26, on the freely rotatable two chain nuts 27 and 28 are arranged. In addition, in addition to the chain nuts 27, 28 still be a rigid connector inserted.

Die verschiebliche Verbindung zwischen dem Traversenabschnitt 13 und dem Traversenabschnitt 14 wird mit Gruppen von Rillenkugellagern 29, 30 erreicht, die auf starren Achsen 31, 32 sitzen. Die starren Achsen 31, 32 sind, wie gezeigt, mit dem Mittelstück 18 des Z-Profilschienenstücks 16 verbunden und stehen auf diesen senkrecht. Auf der Innenseite des Schenkels 18 sind übereinander die beiden Rillenkugellager 29, 30 im Abstand zueinander angeordnet, und zwar so, dass sie gegen die Innenseite der kurzen Schenkel 23, 24 des U-Profilschienenstücks 21 anliegen. Spiegelbildlich zu den Rillenkugellagern 29, 30 auf der linken Seite sind auf der anderen Seite, der rechten Seite, ebenfalls übereinander Rillenkugellager angeordnet, die mit dem U-Profilschienenstück 22 zusammenwirken.The slidable connection between the truss portion 13 and the truss portion 14 is achieved with groups of deep groove ball bearings 29, 30 which sit on rigid axles 31, 32. The rigid axles 31, 32 are, as shown, connected to the center piece 18 of the Z-profile rail piece 16 and are perpendicular to this. On the inside of the leg 18, the two deep groove ball bearings 29, 30 are arranged one above the other at a distance from each other, in such a way that they bear against the inside of the short legs 23, 24 of the U-profile rail piece 21. Mirror images of the deep groove ball bearings 29, 30 on the left side are on the other side, the right side, also arranged one above the other deep groove ball bearings, which cooperate with the U-profile rail piece 22.

Von dieser Art der beschriebenen Lagerung gibt es längs der Traverse 4 wenigstens einen weiteren Satz insgesamt vier Stück, nämlich fluchtend mit der beschriebenen Lagerung auf der gegenüberliegenden Seite zwischen dem Z-Profilschienenstück 15 und dem U-Profilschienenstück 22 und im Abstand dazu in Richtung auf das Fahrwerk 3 nochmals wenigstens zwei solche Gruppen, so dass über den gesamten Verstellhub der Traversenabschnitt 13 mit dem Traversenabschnitt 14 über wenigstens acht Kugellager längsverschieblich gelagert ist. Mit Hilfe der so beschriebenen Lagerung kann der Traversenabschnitt 14 in dem nutartigen Hohlraum zwischen den beiden Z-Profilschienenstücken 15, 16 in Längsrichtung verschoben werden. Damit wird der Abstand zwischen den Fahrwerken 2, 3 entsprechend vergrößert und verkleinert und, wie sich aus der weiten Beschreibung ergibt, auch der Abstand zwischen den Haken bzw. Hakenflaschen 5, 6.Of this type of storage described there are along the cross member 4 at least one other set of four pieces, namely in alignment with the described storage on the opposite side between the Z-profile rail piece 15 and the U-profile rail piece 22 and at a distance in the direction of the Chassis 3 again at least two such groups, so that over the entire adjustment stroke of the truss section 13 is mounted longitudinally displaceable with the truss section 14 via at least eight ball bearings. With the aid of the bearing thus described, the truss section 14 can be displaced in the groove-like cavity between the two Z-profile rail pieces 15, 16 in the longitudinal direction. Thus, the distance between the chassis 2, 3 is increased and decreased accordingly and, as is clear from the broad description, and the distance between the hook or hook bottles 5, 6th

Fig. 3 zeigt in einer Schemadarstellung den Kettenverlauf innerhalb des Doppelkettenzugs 1, wobei lediglich die Kettennüsse veranschaulicht sind, während sämtliche Tragorgane zum Halten der Kettennüsse weggelassen sind. Fig. 3 shows in a schematic representation of the chain course within the double chain hoist 1, wherein only the chain nuts are illustrated, while all support members are omitted for holding the chain nuts.

Der Doppelkettenzug 1 weist gemäß Fig. 3 zwei Lastketten 35, 36 sowie eine Verstellkette 37 auf. Alle Ketten 35, 36, 37 sind Rundgliederketten und haben dieselbe Geometrie. Zum Antrieb der beiden Lastketten 35, 36 dient ein Antriebsmotor 38 auf dessen Getriebeausgangswelle zwei eine Kettennussgruppe 39 bildende Kettennüsse sitzen. Die zu der Kettennussgruppe 39 gehörenden Kettennüsse sind, wie die Schemazeichnung von Fig. 3 erkennen lässt, koaxial angeordnet und drehfest miteinander verbunden. Sie weisen dieselbe Anzahl von Taschen auf. Aus Platzgründen befindet sich diese Kettennussgruppe 39 etwas unterhalb der Traverse 4.The double chain hoist 1 has according to Fig. 3 two load chains 35, 36 and an adjustment chain 37. All chains 35, 36, 37 are round link chains and have the same geometry. To drive the two load chains 35, 36 is a drive motor 38 on the transmission output shaft two chain sprocket 39 forming chain nuts sit. The pancakes belonging to the sprocket group 39 are, as the schematic drawing of Fig. 3 can recognize, arranged coaxially and rotatably connected to each other. They have the same number of pockets. For reasons of space, this chain nut group 39 is located slightly below the traverse 4.

Innerhalb des Traversenabschnitts 13 und unterhalb des Fahrwerks 2 sind in dem Traversenabschnitt 13 zwei lose Umlenkkettennüsse 40 und 41 drehbar gelagert. Die beiden Kettennüsse 40 und 41 sind koaxial zueinander angeordnet, aber unabhängig voneinander drehbar. Die Lastkette 35, die über die Kettennussgruppe 39 angetrieben wird, führt von der zugehörigen Kettennuss der Kettennussgruppe 39 zu der Umlenknuss 40 und von hier aus senkrecht nach unten zu der Hakenflasche 5. Ausgehend von der Hakenflasche 5 führt die Lastkette 35 wieder nach oben zu dem Traversenabschnitt 13. Ihr freies Ende ist an einem Kettenfixpunkt 42 an der Unterseite des Traversenabschnittes 13 verankert.Within the truss section 13 and below the chassis 2, two loose Umlenkkettennüsse 40 and 41 are rotatably mounted in the truss section 13. The two chain nuts 40 and 41 are arranged coaxially with each other, but independently rotatable. The load chain 35, which is driven via the sprocket group 39, leads from the associated sprocket of the sprocket group 39 to the Umlenknuss 40 and from here vertically down to the hook bottle 5. Starting from the hook bottle 5, the load chain 35 leads back up to the Traversal section 13. Its free end is anchored to a chain fixing point 42 on the underside of the truss section 13.

Die Lastkette 36 führt von der anderen der beiden Kettennüsse der Kettennussgruppe 39 über die Umlenkkettennuss 41 in den Raum zwischen den beiden U-Profilschienenstücken 21 und 22 in den Traversenabschnitt 14. Unterhalb des Fahrwerks 3 sind achsparallel und im Abstand zueinander in dem Traversenabschnitt 14 zwei Umlenkkettennüsse 42 und 43 drehbar gelagert. Die Lastkette 36 führt von der Umlenkkettennuss 41 kommend um die Umlenkkettennuss 42 herum nach unten aus dem Traversenabschnitt 14 heraus.The load chain 36 leads from the other of the two chain nuts of the sprocket group 39 via the Umlenkkettennuss 41 in the space between the two U-profile rail pieces 21 and 22 in the truss section 14. Below the chassis 3 are parallel to the axis and at a distance to each other in the truss section 14 two Umlenkkettennüsse 42 and 43 rotatably mounted. The load chain 36 leads from the Umlenkkettennuss 41 coming to the Umlenkkettennuss 42 around down from the truss section 14 out.

Von der Umlenkkettennuss 42 kommend, führt die Lastkette 36 durch die Hakenflasche 6 und wieder nach oben in Richtung auf den Traversenabschnitt 14. Innerhalb des Traversenabschnittes 14 läuft die Lastkette 36 von der Hakenflasche 6 kommend um die Umlenkkettennuss 43 zu einer weiteren Kettennussgruppe 44 am anderen Ende der Traverse 4. Die Kettennussgruppe 44 weist zwei zueinander koaxiale und drehfest miteinander verbundene Kettennüsse. Kettennüsse der Kettennussgruppe 44 weisen untereinander dieselbe Anzahl von Kettentaschen auf. Vorzugsweise dieselbe Anzahl wie auch die Kettennussgruppe 39. Notwendig ist dies jedoch nicht. Die Kettennussgruppe 44 befindet sich neben dem Fahrwerk 3.Coming from the Umlenkkettennuss 42, the load chain 36 leads through the hook block 6 and back up towards the truss section 14. Within the truss section 14, the load chain 36 comes from the hook bottle 6 coming around the Umlenkkettennuss 43 to another Kettennussgruppe 44 at the other end Traverse 4. The chain nut group 44 has two mutually coaxial and non-rotatably connected chain nuts. Chain nuts of the chain nut group 44 have the same number of chain pockets. Preferably the same number as the Kettennussgruppe 39. However, this is not necessary. The chain nut group 44 is located next to the chassis 3.

Das Leertrum der Lastkette 36, das sich im Anschluss an die Kettennussgruppe 44 ausbildet, führt in eine Kettentasche, die unterhalb des Fahrwerks 3 angeordnet ist.The slack side of the load chain 36, which forms following the sprocket group 44, leads into a chain pocket, which is arranged below the chassis 3.

Um den Durchhang der Lastkette 36 innerhalb der Traverse 4 zu minimieren liegt die Lastkette 36 zusätzlich auf der lose drehbaren Kettennuss 28 auf. Die Kettennuss 28 ist in Fig. 3 aus Gründen der Übersichtlichkeit nicht dargestellt. Sie befindet sich zwischen der Kettennussgruppe 39 und der Umlenkkettenuss 42 am distalen Ende des Traversenabschnittts 14.In order to minimize the slack of the load chain 36 within the traverse 4, the load chain 36 is additionally on the loose rotatable sprocket 28 on. The sprocket 28 is in Fig. 3 not shown for reasons of clarity. It is located between the sprocket group 39 and the Umlenkkettenuss 42 at the distal end of the truss portion 14th

Die Kettennussgruppe 44 sitzt auf der Ausgangswelle eines Getriebemotors 45, der intern mit einer Bremseinrichtung versehen ist, wie dies für Kettenzüge typisch ist. Die Bremseinrichtung braucht deswegen an dieser Stelle nicht weiter erläutert zu werden.The sprocket assembly 44 sits on the output shaft of a geared motor 45 which is internally provided with a braking device, as is typical for chain hoists. The braking device therefore need not be further explained at this point.

Sobald die Kettennussgruppe 44 festgesetzt ist, wirkt diese als Kettenfixpunkt für die Lastkette 36. Durch in Gang setzen der Kettennussgruppe 39 mit Hilfe des Getriebemotors 38 werden die beiden Lastketten 35 und 36 synchron um denselben Verstellweg bewegt. Da die freien Enden der beiden Lastketten an dem Fixpunkt 42 bzw. der Kettennussgruppe 44 festgelegt sind, bewegen sich die beiden Hakenflaschen 5, 6 im gleichen Sinne und betragsmäßig um den gleichen Hub. Beide Hakenflaschen 5, 6 können dieselbe Kraft aufbringen.Once the Kettennussgruppe 44 is fixed, this acts as a chain fix point for the load chain 36. By setting the Kettennussgruppe 39 using the geared motor 38, the two load chains 35 and 36 are moved synchronously by the same displacement. Since the free ends of the two load chains are fixed to the fixed point 42 or the chain nut group 44, the two hook bottles 5, 6 move in the same direction and in terms of amount by the same stroke. Both hook bottles 5, 6 can apply the same force.

Die Verstellkette 37 ist mit einem Ende an einem Fixpunkt 48 befestigt, der an dem Traversenabschnitt 13 an dessen distalem Ende sitzt und zwischen die beiden U-Profilschienen 21, 22 des Traversenabschnittes 14 hineinragt. Von diesem Fixpunkt 48 führt die Verstellkette zu der Umlenkkettennuss 27, die am distalen Ende des Traversenabschnittes 14, wie in Fig. 2 gezeigt, zwischen den beiden U-Profilschienen 21, 22 frei drehbar gelagert ist. Nach einer 180° Umlenkung um die Kettennuss 27 läuft die Verstellkette 37 zu der zugehörigen Kettennuss der Kettennussgruppe 44 und um diese herum zurück zu dem Fixpunkt 48.The adjusting chain 37 is attached at one end to a fixed point 48, which sits on the truss section 13 at its distal end and projects between the two U-profile rails 21, 22 of the truss section 14. From this fixed point 48, the adjustment chain leads to the Umlenkkettennuss 27, which at the distal end of the truss portion 14, as in Fig. 2 shown, between the two U-profile rails 21, 22 is freely rotatably mounted. After a 180 ° deflection around the sprocket 27, the adjusting chain 37 runs to the associated sprocket of the sprocket group 44 and around it back to the fixed point 48th

Ohne Berücksichtigung der Wirkungsweise der Lastkette 36 führt eine Verstellung der Kettennussgruppe 44 im Uhrzeigersinne, bezogen auf Fig. 3 dazu, dass der Fixpunkt 48 zu der Kettennussgruppe 44 herangezogen wird. Das bedeutet, dass die beiden Traversenabschnitte 13, 14 aufeinander zu wandern. Eine Drehung der Kettennussgruppe 44 im Gegenuhrzeigersinne hingegen zieht den Fixpunkt 48 in Richtung auf die Umlenkkettennuss 27, womit der Abstand zwischen den Hakenflaschen 5, 6 vergrößert wird.Regardless of the operation of the load chain 36 performs an adjustment of the sprocket group 44 in the clockwise direction, based on Fig. 3 to that the fixed point 48 is used to the sprocket group 44. This means that the two truss sections 13, 14 migrate toward each other. A rotation of the chain nut group 44 in the counterclockwise direction, however, pulls the fixed point 48 in the direction of the Umlenkkettennuss 27, whereby the distance between the hook bottles 5, 6 is increased.

Zur weiteren Erläuterung sei nunmehr angenommen, dass der Doppelkettenzug 1 eine Position einnimmt, wie sie in Fig. 3 schematisch gezeichnet ist. Wenn in dieser Position die Kettennussgruppe 44 im Uhrzeigersinne bewegt wird, wird, wie oben erläutert, der Fixpunkt 48 zum Fahrwerk 3 herangezogen, d.h. die Hakenflasche 5 unterhalb des Fahrwerks 2, die über den dort vorhandenen Fixpunkt 42 und die Umlenkkettennuss 40 mit dem Traversenabschnitt 13 verbunden ist, bewegt sich in Richtung auf die Hakenflasche 6. Aufgrund dieser Bewegung würde an sich das Kettenstück der Lastkette 36 zwischen der Umlenkkettennuss 41 und der Umlenkkettennuss 42 zu lang werden. Weil jedoch die Kettennussgruppe 44 eine zweite Kettennuss für die Lastkette 36 trägt, wird durch die Doppelkettennuss 44 in dem Maße, in dem sich die beiden 13, 14 annähern, der überschüssig werdende Teil der Lastkette 36 durch die Traverse hindurch und über die Doppelkettennuss 44 weg transportiert. Beim Verstellen läuft sozusagen die Lastkette 36 durch die Hakenflasche 6 hindurch, was dazu führt, dass letztendlich die Hakenflasche 6 auf der gezeigten Höhe bleibt, unabhängig davon, wie der Abstand zwischen den Hakenflaschen 5, 6 eingestellt wird. Für die umgekehrte Bewegung gilt sinngemäß das Gleiche doch mit entgegengesetzten Vorzeichen, d.h. wenn die Traversenabschnitte 13, 14 auseinander gefahren werden, wird zwischen der Kettennussgruppe 39 und der weg laufendenden Kettennuss 42 zusätzlich Lastkette 36 benötigt. Diese wird mit Hilfe der Kettennussgruppe 44 beim in Gang setzen des Antriebsmotors 45 aus einem entsprechenden Speicher, der sich unterhalb der Kettennussgruppe 44 befindet, in die Traverse 4 transportiert.For further explanation, it is now assumed that the double chain hoist 1 assumes a position as in Fig. 3 is drawn schematically. If, in this position, the chain nut group 44 is moved in the clockwise direction, as discussed above, the fixed point 48 is used for the chassis 3, ie the hook block 5 below the chassis 2, the existing there about the fixed point 42 and the Umlenkkettennuss 40 with the truss section 13th As a result of this movement, the chain piece of the load chain 36 between the Umlenkkettennuss 41 and the Umlenkkettennuss 42 would be too long per se. However, because the sprocket assembly 44 carries a second sprocket for the load chain 36, as the two 13, 14 approach, the double chain sprocket 44 clears the excess portion of the load chain 36 by the traverse and across the double chain sprocket 44 transported. When adjusting runs so to speak, the load chain 36 through the hook bottle 6 through, which leads to the fact that ultimately the hook bottle 6 remains at the height shown, regardless of how the distance between the hook bottles 5, 6 is set. For the reverse movement, the same applies mutatis mutandis with opposite signs, ie, when the truss sections 13, 14 are moved apart, additional load chain 36 is needed between the sprocket group 39 and the running away sprocket 42. This is transported by means of the sprocket group 44 when putting the drive motor 45 from a corresponding memory, which is located below the sprocket group 44, in the traverse 4.

Mit anderen Worten: Das in Fig. 3 oben liegende Trumm der Verstellkette 37 vollführt denselben Hub mit derselben Bewegungsrichtung, wie die Lastkette 36 zwischen der Umlenkkettennuss 43 und der Kettennussgruppe 44.In other words, that in Fig. 3 Trumm lying above the Verstellkette 37 performs the same stroke with the same direction of movement, as the load chain 36 between the Umlenkkettennuss 43 and the sprocket group 44.

Wie unschwer zu erkennen ist, ist es funktionsmäßig nur notwendig, dass die Kettennussgruppe 44 zwei Kettennüsse, nämlich eine für die Verstellkette 37 und eine für die Lastkette 36 hat. Um die Betriebsbedingung zu erreichen genügt es, wenn diese beiden Kettennüsse dieselbe Anzahl von Kettentaschen haben. Die Kettennussgruppe 44 muss hinsichtlich der Kettentaschen pro Kettennuss keineswegs mit der Kettennussgruppe 39 übereinstimmen. Aus fertigungstechnischen Gründen ist es jedoch vorteilhaft, wenn beide Kettennussgruppen identisch sind.As can be easily recognized, it is functionally only necessary that the sprocket group 44 has two chain nuts, namely one for the adjusting chain 37 and one for the load chain 36. To achieve the operating condition it is sufficient if these two chain nuts have the same number of chain pockets. The sprocket group 44 must by no means coincide with the sprocket group 39 with regard to the chain pockets per sprocket. For manufacturing reasons, however, it is advantageous if both Kettennussgruppen are identical.

Eine Betrachtung der Kräfte zeigt im Übrigen auch, der der Antriebsmotor 45 kann sehr viel schwächer dimensioniert werden als der Antriebsmotor 38. Eine an der Hakenflasche 6 hängende Last ist bestrebt, den Kettenabschnitt der Lastkette 36 zwischen der Umlenkkettennuss und der Kettennussgruppe 44 nach links, bezogen auf Fig. 3, zu ziehen. Dies erzeugt an der Kettennussgruppe 44 ein Drehmoment im Gegenuhrzeigersinn. Gleichzeitig ist diese Kraft bestrebt, die beiden Traversenabschitte 13, 14 aufeinander zu zu bewegen. In der Verstellkette 37 wirkt jedoch aufgrund des eingeleiteten Drehmoments die Kraft in der entgegengesetzten Richtung, d.h. ein Drehmoment der Kettennussgruppe 44 im Gegenuhrzeigersinne setzt das untere Trumm der Verstellkette 37 unter Zugspannung, so dass die Verstellkette 37 bestrebt ist den Fixpunkt 48 von der Kettennussgruppe 44 weg zu ziehen. Mit anderen Worten: Die Längskräfte heben sich im Bereich der Kettennussgruppe 44 auf und es genügt für den Antrieb dieser Kettennussgruppe einen Antrieb vorzusehen, der lediglich in der Lage ist die Verstellkräfte aufzubringen und der eine geringe Bremswirkung hat, damit nicht durch Unsymmetrien infolge von Reibung eine unerwünschte Verstellung zustande kommt.A consideration of the forces shows, moreover, that the drive motor 45 can be much smaller dimensioned than the drive motor 38. A hanging on the hook block 6 load strives to the chain portion of the load chain 36 between the Umlenkkettennuss and the Kettennussgruppe 44 to the left, related on Fig. 3 to pull. This produces counterclockwise torque on the sprocket assembly 44. At the same time, this force endeavors to move the two truss sections 13, 14 towards each other. In the adjusting chain 37, however, the force acts in the opposite direction due to the torque introduced, ie a torque of the chain nut group 44 in the counterclockwise direction sets the lower run of the adjusting chain 37 under tension, so that the adjusting chain 37 endeavors the fixed point 48 away from the chain nut group 44 to draw. In other words, the longitudinal forces cancel each other out in the area of the sprocket group 44 and it suffices to provide a drive for the drive of this sprocket group, which is only able to apply the adjustment forces and which has a low braking effect, thus not by asymmetries as a result of friction, an undesirable adjustment comes about.

Lediglich der Vollständigkeit halber seien nachstehend noch einige Details zu der konstruktiven Ausführung der Antriebe gemacht.Only for the sake of completeness, a few details on the structural design of the drives are made below.

Fig. 4 zeigt das linksseitige Ende des Doppelkettenzugs 1. Die Darstellung ist längs der vertikalen Mittelebene parallel zu der Traverse 4 geschnitten. Wie zu erkennen ist, sitzt auf einer zwischen den Z-Profilschienen 15 und 16 auf einer zwischen diesen gehalterten Achse 51 die Kettennuss 40. Die andere Kettennuss 41 ist wegen der geschnittenen Darstellung nicht zu erkennen. Die Kettennuss 40 wird teilweise von einem Kettenführungsteil 52 umgeben, das an dem Schenkel 18 der Z-Profilschiene 15 befestigt ist. Fig. 4 shows the left-side end of the double chain hoist 1. The illustration is cut along the vertical center plane parallel to the traverse 4. As can be seen sitting on one between the Z-profile rails 15 and 16 on a content Erten therebetween axis 51, the sprocket 40. The other sprocket 41 is not visible because of the sectional view. The sprocket 40 is partially surrounded by a chain guide member 52 which is secured to the leg 18 of the Z-profile rail 15.

Unterhalb der Kettennuss 40 befindet sich eine Kettenführungsplatte 52, die fluchtend mit den Trumen der Lastkette 35 fluchtende Öffnungen 53 und 54 enthält.Below the sprocket 40 is a chain guide plate 52 which includes flush with the trays of the load chain 35 aligned openings 53 and 54.

Zur linken Seite hin erstreckt sich eine schräg nach unten abgewinkelter Arm 55, an der der Antrieb 38 befestigt ist. Der Antrieb 38 umfasst einen Antriebsmotor 56, der über ein Getriebe eine Getriebeausgangswelle 57 antreibt. Auf der Getriebeausgangswelle sitzen achsparallel zueinander die beiden zu der Kettennussgruppe 39 gehörenden Kettennüsse. Von diesen ist wegen der geschnittenen Darstellung lediglich die aus der Betrachtungsseite her hintere Kettennuss 58 zu sehen um die die Lastkette 35 herumführt.To the left side extends an obliquely downwardly angled arm 55 to which the drive 38 is attached. The drive 38 comprises a drive motor 56 which drives a transmission output shaft 57 via a transmission. On the transmission output shaft sitting axially parallel to each other, the two belonging to the sprocket group 39 chain nuts. Of these, due to the cut representation, only the chain sprocket 58, which is at the rear from the viewing side, can be seen around which the load chain 35 guides.

Die Kettennussgruppe 39 ist von einem Kettennussgehäuse 59 umgeben, das entsprechende Kettenführungskanäle 59 für die beiden Lastketten 35 und 36 enthält.The sprocket group 39 is surrounded by a sprocket housing 59, the corresponding chain guide channels 59 for the contains two load chains 35 and 36.

Der Kettenführungskanal 60 der Lastkette 35 zeigt, wie die Figur erkennen lässt, schräg nach unten. Unterhalb der Mündung des Kettenführungskanals 60 befindet sich eine Kettenspeichertasche 61.The chain guide channel 60 of the load chain 35, as the figure can be seen, obliquely downwards. Below the mouth of the chain guide channel 60 is a chain storage pocket 61.

Eine weitere der Kettenspeichertasche 61 entsprechende Kettenspeichertasche wäre oberhalb der Zeichenebene zu denken, ebenso wie die zu der Lastkette 36 gehörige Kettennuss, der Kettennussgruppe 39.A further chain storage pocket corresponding to the chain storage pocket 61 would be conceivable above the drawing plane, as would the chain nut belonging to the load chain 36, the chain nut group 39.

Das andere Ende des Kettenführungskanals 60 ist so angeordnet, dass die Kette ohne Knick von der Kettennuss 57 zu der Umlenkkettennuss 40 führt.The other end of the chain guide channel 60 is arranged so that the chain without kink of the sprocket 57 leads to the Umlenkkettennuss 40.

Das freie Ende der Lastkette 35 ist in der Platte 52 in der Öffnung 53 verankert. Diese Öffnung bildet gleichzeitig den Fixierungspunkt 42.The free end of the load chain 35 is anchored in the plate 52 in the opening 53. This opening simultaneously forms the fixation point 42.

Fig. 5 zeigt eine Draufsicht auf das rechte Ende des Doppelkettenzugs 1, und zwar geschnitten etwa auf der Höhe der Achse der Führungskugellager 29. Wie zu sehen ist, sitzen auf zwei zueinander parallelen Achsen 63 und 64 drehbar die beiden Umlenkkettennüsse 42 und 43. In dem Spalt zwischen diesen Kettennüssen taucht die Lastkette 36 nach unten senkrecht zu der Zeichenebene weg, während die Verstellkette 37 seitlich neben den beiden Kettennüssen 42 und 43 vorbei läuft. Am rechten freien Ende sitzt der Antriebsmotor 45. Auf dessen Getriebeausgangswelle 65 sitzen drehfest nebeneinander zwei Kettennüsse 66 und 67, die die Kettennussgruppe 44 bilden. Fig. 5 shows a plan view of the right end of the double chain hoist 1, and cut approximately at the level of the axis of the guide ball bearings 29. As can be seen, sitting on two parallel axes 63 and 64, the two Umlenkkettennüsse 42 and 43. In the gap between these chain nuts the load chain 36 dives down perpendicular to the plane, while the adjustment chain 37 laterally beside the two chain nuts 42 and 43 passes. At the right free end of the drive motor 45 is seated on the transmission output shaft 65 sitting next to each other rotatably two chain nuts 66 and 67, which form the Kettennussgruppe 44.

Ein Doppelkettenzug weist eine teleskopartig ausziehbare und zusammenschiebbare Traverse auf, wobei in der Nähe der Enden der beiden zu der Traverse gehörenden Teleskopstücke jeweils Lastketten zu darunter hängenden Hakenflaschen führen. Mittels einer weiteren Kette kann der Abstand zwischen den Teleskopstücken variiert werden. Die Kette zum variieren der Länge der Traverse läuft über eine Kettennuss mit der drehfest eine weitere Kettennuss verbunden ist, die den Fixpunkt für jene Lastkette für die Hakenflasche des betreffenden Traversenteleskopstücks dient.A double chain hoist has a telescopically extendable and collapsible traverse, with load chains leading to hook hooks below them, near the ends of the two telescopic pieces belonging to the traverse. By means of another chain, the distance between the telescopic pieces can be varied. The chain for varying the length of the traverse runs over a sprocket with the rotatably connected to another sprocket nut, which serves as the fixed point for that load chain for the hook bottle of the relevant Traversenteleskopstücks.

Claims (14)

  1. Double chain hoist assembly
    with a cross beam (4), which is adjustable in length and has a first and a second cross beam section (13, 14), which are connected to one another to be displaceable relative to one another in longitudinal direction, wherein each cross beam section (13, 14) has an end adjacent to the other cross beam section (13, 14) and an end remote from the other cross beam section (13, 14),
    with a first sprocket wheel group (39) comprising two coaxial sprocket wheels, which are connected to one another to be fixed against rotation and are rotatably mounted on the remote end of the first cross beam section (13),
    with a load chain fixed point (42) next to the first sprocket wheel group (39),
    with an adjusting chain fixed point (48), which is provided on the adjacent end of the first cross beam section (13),
    with a first hook block (5), which is associated with the first cross beam section (13),
    with a second sprocket wheel group (44) comprising two coaxial sprocket wheels,
    which are connected to one another to be fixed against rotation, are rotatably mounted on the remote end of the second cross beam section (14) and are axis-parallel to the first sprocket wheel group (39),
    with spaced guide sprocket wheels (42, 43), which are arranged axis-parallel to the first sprocket wheel group (39) and are arranged on the second cross beam section (14) in the vicinity of the second sprocket wheel group (44),
    with a guide sprocket wheel (27) on the adjacent end of the second cross beam section (14),
    with a second hook block (6), which is associated with the second cross beam section (14),
    with a first load chain (35), which runs from the first sprocket wheel group (39) to the first hook block (5) and from there to the load chain fixed point (42),
    with a second load chain (36), which runs from the first sprocket wheel group (39) to one of the two guide sprocket wheels (42), from there to the second hook block (6) and from the second hook block (6) over the second guide sprocket wheel (43) to the second sprocket wheel group (44),
    with an adjusting chain (37), which runs around a sprocket wheel of the second sprocket wheel group (44) and around the guide sprocket wheel (27) on the adjacent end of the second cross beam section (14) and the ends thereof are fastened to the adjusting chain fixed point (48).
  2. Double chain hoist assembly according to claim 1, characterised in that the sprocket wheels of the first sprocket wheel group (39) have the same number of chain recesses.
  3. Double chain hoist assembly according to claim 1, characterised in that the sprocket wheels of the second sprocket wheel group (44) have the same number of chain recesses.
  4. Double chain hoist assembly according to claim 1, characterised in that two chain storage recesses (61) are provided next to the first sprocket wheel group (39).
  5. Double chain hoist assembly according to claim 1, characterised in that only one chain storage recess is present next to the second sprocket wheel group (44).
  6. Double chain hoist assembly according to claim 1, characterised in that a braking device is associated with the second sprocket chain group (44).
  7. Double chain hoist assembly according to claim 1, characterised in that each sprocket chain group (39, 44) has its own associated drive motor (38, 45).
  8. Double chain hoist assembly according to claim 1, characterised in that the drive motor (45) of the second sprocket wheel group (44) is smaller in dimension with respect to the driving torque than the drive motor (38) of the first sprocket wheel group (39).
  9. Double chain hoist assembly according to claim 1, characterised in that each cross beam section (13, 14) is provided with a travelling gear (2, 3).
  10. Double chain hoist assembly according to claim 1, characterised in that the travelling gear (2, 3) is located next to the remote end of the respective cross beam section (13, 14).
  11. Double chain hoist assembly according to claim 1, characterised in that at least one travelling gear (23) is provided with a travelling gear motor.
  12. Double chain hoist assembly according to claim 1, characterised in that the first sprocket wheel group (39) is arranged below the first cross beam section (13), and that guide sprocket wheels (40, 41) are respectively provided at the level of the first cross beam section (13) for the first and the second load chain (35, 36).
  13. Double chain hoist assembly according to claim 1, characterised in that the first cross beam section (13) has two Z-section rail pieces, which are arranged parallel next to one another and delimit a downwardly open groove.
  14. Double chain hoist assembly according to claim 1, characterised in that the second cross beam section (14) has two U-section rail pieces, which are arranged parallel next to one another, are arranged back to back (25) and between which the second load chain (36) and the adjusting chain (37) run.
EP09015536A 2009-01-21 2009-12-16 Double chain hoist assembly Not-in-force EP2210849B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009005592A DE102009005592B3 (en) 2009-01-21 2009-01-21 Doppelkettenzuganordnung

Publications (2)

Publication Number Publication Date
EP2210849A1 EP2210849A1 (en) 2010-07-28
EP2210849B1 true EP2210849B1 (en) 2011-11-30

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EP09015536A Not-in-force EP2210849B1 (en) 2009-01-21 2009-12-16 Double chain hoist assembly

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US (1) US8226137B2 (en)
EP (1) EP2210849B1 (en)
JP (1) JP5671238B2 (en)
CN (1) CN101786573B (en)
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CN101786573B (en) 2013-10-16
US8226137B2 (en) 2012-07-24
JP2010168219A (en) 2010-08-05
RU2010101807A (en) 2011-07-27
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ATE535485T1 (en) 2011-12-15
RU2507145C2 (en) 2014-02-20

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