EP0503227B1 - Sectional boom for a tower crane - Google Patents
Sectional boom for a tower crane Download PDFInfo
- Publication number
- EP0503227B1 EP0503227B1 EP92100529A EP92100529A EP0503227B1 EP 0503227 B1 EP0503227 B1 EP 0503227B1 EP 92100529 A EP92100529 A EP 92100529A EP 92100529 A EP92100529 A EP 92100529A EP 0503227 B1 EP0503227 B1 EP 0503227B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jib
- boom
- coding
- locating elements
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
Definitions
- the invention relates to a collapsible boom for a tower crane, in particular a construction tower crane, comprising a plurality of boom segments which are arranged one behind the other in the longitudinal direction of the boom and are detachably connected to one another.
- Construction cranes are usually broken down into segments, transported and assembled at the operating site with regard to both their tower and their jib.
- the boom segments often have the same dimensions, and the frame structures of the individual boom segments are very similar, even though the cross-sections of the bars, which determine the load-bearing capacity of the boom, vary according to the location of the segment within the boom.
- the boom segments are usually identified by embossed or painted numbers or the like so that their installation location within the boom is determined, it can be due to the similarity of the boom segments and their same dimensions in particular of the connecting couplings to assembly errors, which would unduly weaken the load capacity of the crane.
- the boom can often be assembled from a set of existing boom segments using the modular principle. Since predetermined installation locations of the individual jib segments must also be observed here, installation errors and an unintentional reduction in the lifting capacity of the crane can also occur.
- pairs of mutually complementary coding-fitting elements are provided at mutually adjacent longitudinal ends of the cantilever segments, which allow a connection of each cantilever element only in a predetermined local position relative to the other cantilever segments, the pairs of fitting elements in the event of a deviation from the predetermined position keep the associated boom elements at a distance from each other, which prevents the connection of the boom segments.
- the fitting elements ensure that each boom segment can only be installed in the installation position and in the orientation for which it is dimensioned with regard to its load-bearing capacity. In the case of fitting elements that do not belong together, the coupling members between adjacent cantilever segments cannot be closed.
- the coding mating elements can have multiple mating surfaces have, the shape and location relative to each other determine the coding. In a preferred embodiment, however, the coding fitting elements all have the same shape and dimensions, which considerably simplifies production.
- the coding is determined by the position in which the fitting elements are attached to the ends of the cantilever segments.
- the fitting elements can be provided on a cross-member of the frame structure of the boom segments, which cross-section may be present anyway, the transverse position on the cross-member determining the coding.
- the coding fitting elements are designed as hole-and-pin fitting elements which can be plugged in the longitudinal direction of the boom.
- the pin engages at the front end of the one boom segment in the hole provided on the opposite front end of the other boom segment, and the coupling members of the boom segments can be closed. If the pin is not aligned with the hole, it forms a stop which prevents the coupling elements from closing.
- Fig. 1 shows a construction site tower crane with a tower 1 and a boom 3.
- the boom 3 is for transport can be dismantled and consists of a plurality of boom segments 5 arranged one behind the other in the longitudinal direction in the form of frame structures which are detachably coupled to one another at their ends 7 via coupling members, here in the form of sleeves 9 and plug pins 11 (FIG. 2).
- the pins 11 can be inserted into the sleeves 9 in the longitudinal direction of the boom 3 and can be coupled to one another via cross bolts or the like.
- the individual boom segments 5 must be mounted in a predetermined local position relative to one another. In order to avoid installation errors that could lead to a weakening of the load-bearing capacity of the crane, in spite of the fact that the outer dimensions and the dimensions of the frame construction, in particular the rod cross sections, differ only slightly from one another, the ends 7 of the individual boom segments 5 are closely adjacent with the boom 3 in the assembled state Cross members 13 provided.
- a pair of fitting elements consisting of a fitting hole 15 and a fitting pin 17 protruding in the longitudinal direction of the arm 3 is assigned to each pair of opposing crossbeams 13.
- Each of the boom segments 5 thus has a fitting pin on one side and a fitting hole on its other side.
- the fitting holes 15 are the same size as each other, as are the fitting pins 17, both in terms of diameter and length.
- the position of each pair of fitting holes and fitting pins along the crossmember 13 is selected so that only boom segments 5 assigned to one another in accordance with the crane construction can be inserted so far into one another that the couplings formed from the sleeves 9 and the pins 11 can be locked.
- 2a and 2b show the relationships in different coupling levels with boom segments not merged, the the sleeves 9-bearing end face is drawn in front view and the end carrying the pin 11 in plan view.
- Fig. 3 shows the situation with the clutch closed and inserted, the pin 11 locking the pin 9 in the sleeve 9.
- the fitting pin 17 penetrates the fitting hole 15. If an attempt is made to couple non-matching cantilever segments, the pin 17 abuts the crossbar 13 of the adjacent boom segment, and the bolt 19 can not be inserted.
- the crossbeams 13 can be a construction part of the frame construction of the boom segment 5; but it can also be welded in as an additional part that only serves for coding.
- the embodiment shows cylindrical fitting elements.
- Other shapes, in particular rectangular or square fitting elements, can also be used.
- several pairs of fitting elements can be provided for coding on each of the end faces of the cantilever segments.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
Description
Die Erfindung betrifft einen zerlegbaren Ausleger für einen Turmkran, insbesondere einen Bau-Turmkran, umfassend mehrere in Auslegerlängsrichtung hintereinander angeordnete, lösbar miteinander verbundene Auslegersegmente.The invention relates to a collapsible boom for a tower crane, in particular a construction tower crane, comprising a plurality of boom segments which are arranged one behind the other in the longitudinal direction of the boom and are detachably connected to one another.
Baukräne werden üblicherweise sowohl hinsichtlich ihres Turms als auch hinsichtlich ihres Auslegers in Segmente zerlegt, transportiert und am Betriebsort zusammengesetzt. Die Auslegersegmente haben vielfach gleiche Abmessungen, und auch die Rahmenkonstruktionen der einzelnen Auslegersegmente haben große Ähnlichkeit, wenngleich die Stabquerschnitte, durch die die Tragfähigkeit des Auslegers bestimmt ist, dem Einbauort des Segments innerhalb des Auslegers entsprechend variiert. Zwar sind die Auslegersegmente normalerweise durch eingeschlagene oder aufgemalte Ziffern oder dergleichen gekennzeichnet, so daß ihr Einbauort innerhalb des Auslegers festliegt, doch kann es aufgrund der Ähnlichkeit der Auslegersegmente und ihrer gleichen Abmessungen insbesondere auch der Verbindungskupplungen zu Zusammenbaufehlern kommen, durch die die Tragfähigkeit des Krans unzulässig geschwächt würde.Construction cranes are usually broken down into segments, transported and assembled at the operating site with regard to both their tower and their jib. The boom segments often have the same dimensions, and the frame structures of the individual boom segments are very similar, even though the cross-sections of the bars, which determine the load-bearing capacity of the boom, vary according to the location of the segment within the boom. Although the boom segments are usually identified by embossed or painted numbers or the like so that their installation location within the boom is determined, it can be due to the similarity of the boom segments and their same dimensions in particular of the connecting couplings to assembly errors, which would unduly weaken the load capacity of the crane.
Um die Länge des Auslegers variieren zu können, kann der Ausleger vielfach nach dem Baukastenprinzip aus einem Satz vorhandener Auslegersegmente zusammengestellt werden. Da auch hierbei vorbestimmte Einbauorte der einzelnen Auslegersegmente beachtet werden müssen, kann es ebenfalls zu Einbaufehlern und zu einer unbeabsichtigten Verringerung der Tragkraft des Krans kommen.In order to be able to vary the length of the boom, the boom can often be assembled from a set of existing boom segments using the modular principle. Since predetermined installation locations of the individual jib segments must also be observed here, installation errors and an unintentional reduction in the lifting capacity of the crane can also occur.
Es ist Aufgabe der Erfindung, einen zerlegbaren Ausleger für einen Turmkran, insbesondere einen Bau-Turmkran, anzugeben, bei welchem Montagefehler mit Sicherheit vermieden werden.It is an object of the invention to provide a collapsible boom for a tower crane, in particular a construction tower crane, in which assembly errors can be avoided with certainty.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß an einander paarweise benachbarten Längsenden der Auslegersegmente Paare zueinander komplementärer Kodierungs-Paßelemente vorgesehen sind, die eine Verbindung jedes Auslegerelements ausschließlich in einer vorbestimmten örtlichen Lage relativ zu den übrigen Auslegersegmenten zulassen, wobei die Paßelementpaare bei einer Abweichung von der vorbestimmten Lage die zugeordneten Auslegerelemente in einem Abstand voneinander halten, der die Verbindung der Auslegersegmente verhindert. Die Paßelemente sorgen dafür, daß jedes Auslegersegment ausschließlich in der Einbaulage und in der Orientierung montiert werden kann, für die es hinsichtlich seiner Tragfähigkeit bemessen ist. Bei nicht zusammengehörenden Paßelementen können die Kupplungsorgane zwischen benachbarten Auslegersegmenten nicht geschlossen werden.This object is achieved in that pairs of mutually complementary coding-fitting elements are provided at mutually adjacent longitudinal ends of the cantilever segments, which allow a connection of each cantilever element only in a predetermined local position relative to the other cantilever segments, the pairs of fitting elements in the event of a deviation from the predetermined position keep the associated boom elements at a distance from each other, which prevents the connection of the boom segments. The fitting elements ensure that each boom segment can only be installed in the installation position and in the orientation for which it is dimensioned with regard to its load-bearing capacity. In the case of fitting elements that do not belong together, the coupling members between adjacent cantilever segments cannot be closed.
Die Kodierungs-Paßelemente können mehrere Paßflächen haben, deren Form und Lage relativ zueinander die Kodierung festlegen. In einer bevorzugten Ausgestaltung haben die Kodierungs-Paßelemente jedoch sämtlich gleiche Form und gleiche Abmessungen, was die Herstellung beträchtlich vereinfacht. Die Kodierung wird hierbei durch die Lage, in der die Paßelemente an den Stirnenden der Auslegersegmente angebracht sind, bestimmt. Beispielsweise können die Paßelemente an einer gegebenenfalls ohnehin vorhandenen Traverse der Rahmenkonstruktion der Auslegersegmente vorgesehen sein, wobei die Querposition auf der Traverse die Kodierung bestimmt.The coding mating elements can have multiple mating surfaces have, the shape and location relative to each other determine the coding. In a preferred embodiment, however, the coding fitting elements all have the same shape and dimensions, which considerably simplifies production. The coding is determined by the position in which the fitting elements are attached to the ends of the cantilever segments. For example, the fitting elements can be provided on a cross-member of the frame structure of the boom segments, which cross-section may be present anyway, the transverse position on the cross-member determining the coding.
In einer besonders einfachen Variante sind die KodierungsPaßelemente als in Auslegerlängsrichtung steckbare Loch-Zapfen-Paßelemente ausgebildet. Bei einander zugeordneten Paßelementen greift der Zapfen am Stirnende des einen Auslegersegments in das am gegenüberliegenden Stirnende des anderen Auslegersegments vorgesehene Loch ein, und die Kupplungsorgane der Auslegersegmente können geschlossen werden. Fluchtet der Zapfen nicht mit dem Loch, so bildet er einen Anschlag, der das Schließen der Kupplungsorgane verhindert.In a particularly simple variant, the coding fitting elements are designed as hole-and-pin fitting elements which can be plugged in the longitudinal direction of the boom. In the case of mating elements which are assigned to one another, the pin engages at the front end of the one boom segment in the hole provided on the opposite front end of the other boom segment, and the coupling members of the boom segments can be closed. If the pin is not aligned with the hole, it forms a stop which prevents the coupling elements from closing.
Im folgenden soll die Erfindung anhand einer Zeichnung näher erläutert werden. Hierbei zeigt:
- Fig. 1
- eine schematische Darstellung eines BauTurmkrans;
- Fig. 2a und 2b
- in Längsrichtung des Auslegers hintereinander angeordnete Kodierungs-Paßelemente und
- Fig. 3
- eine Schnittansicht durch den Ausleger, gesehen einer Linie III-III in Fig. 1.
- Fig. 1
- a schematic representation of a construction tower crane;
- 2a and 2b
- in the longitudinal direction of the boom arranged one behind the other coding fitting elements and
- Fig. 3
- a sectional view through the boom, seen a line III-III in Fig. 1st
Fig. 1 zeigt einen Baustellen-Turmkran mit einem Turm 1 und einem Ausleger 3. Der Ausleger 3 ist für den Transport zerlegbar und besteht aus mehreren in Langsrichtung hintereinander angeordneten Auslegersegmenten 5 in Form von Rahmenkonstruktionen, die an ihren Stirnenden 7 über Kupplungsorgane, hier in Form von Hülsen 9 und Steckzapfen 11 lösbar miteinander gekuppelt sind (Fig. 2). Die Zapfen 11 sind in Langsrichtung des Auslegers 3 in die Hülsen 9 einführbar und über Querbolzen oder dergleichen miteinander kuppelbar.Fig. 1 shows a construction site tower crane with a tower 1 and a
Die einzelnen Auslegersegmente 5 müssen in vorbestimmter örtlicher Lage relativ zueinander montiert werden. Um trotz vielfach gleicher Außenabmessungen und nur wenig voneinander abweichender Bemessung der Rahmenkonstruktion, insbesondere deren Stabquerschnitte, Einbaufehler zu vermeiden, die zu einer Schwächung der Tragfähigkeit des Krans führen könnten, sind die Stirnenden 7 der einzelnen Auslegersegmente 5 mit in montiertem Zustand des Auslegers 3 eng benachbarten Quertraversen 13 versehen. Jedem Paar einander gegenüberliegender Quertraversen 13 ist ein Paßelementpaar bestehend aus einem Passungsloch 15 und einem in Längsrichtung des Auslegers 3 abstehenden Passungszapfen 17 zugeordnet. Jedes der Auslegersegmente 5 hat damit auf seiner einen Seite einen Passungszapfen und auf seiner anderen Seite ein Passungsloch. Die Passungslöcher 15 haben untereinander gleiche Größe, ebenso auch die Passungszapfen 17, und zwar sowohl hinsichtlich des Durchmessers als auch der Länge. Die Lage jedes Passungsloch-Passungszapfen-Paars entlang der Quertraverse 13 ist so gewählt, daß lediglich entsprechend der Krankonstruktion einander zugeordnete Auslegersegmente 5 so weit ineinander gesteckt werden können, daß die aus den Hülsen 9 und den Zapfen 11 gebildeten Kupplungen verriegelt werden können. Die Fig. 2a und 2b zeigen die Verhältnisse in verschiedenen Kupplungsebenen bei nicht zusammengeführten Auslegersegmenten, wobei das die Hülsen 9 tragende Stirnende in Stirnansicht und das die Zapfen 11 tragende Ende in Draufsicht gezeichnet ist. Fig. 3 zeigt die Verhältnisse bei geschlossener Kupplung und eingeführtem, den Zapfen 11 in der Hülse 9 verriegelnden Bolzen 19. Wie dargestellt, durchdringt der Paßzapfen 17 das Paßloch 15. Wird versucht, nicht zusammengehörende Auslegersegmente miteinander zu kuppeln, so stößt der Zapfen 17 an die Quertraverse 13 des benachbarten Auslegersegments, und der Bolzen 19 kann nicht eingeschoben werden.The
Bei den Quertraversen 13 kann es sich um ein Konstruktionsteil der Rahmenkonstruktion des Auslegersegments 5 handeln; es kann aber auch als zusätzliches, nur der Kodierung dienendes Teil eingeschweißt sein.The
Das Ausführungsbeispiel zeigt zylindrische Paßelemente. Es können auch andere Formen, insbesondere rechteckförmige oder quadratische Paßelemente benutzt werden. Weiterhin können mehrere Paßelementpaare zur Kodierung an jedem der Stirnenden der Auslegersegmente vorgesehen sein.The embodiment shows cylindrical fitting elements. Other shapes, in particular rectangular or square fitting elements, can also be used. Furthermore, several pairs of fitting elements can be provided for coding on each of the end faces of the cantilever segments.
Claims (4)
- A demountable jib for a tower crane, in particular a building tower crane, comprising a plurality of jib sections (5) which are disposed successively in the longitudinal direction of the jib and which are detachably connected with one another, characterised in that pairs of mutually complementary coding/locating elements (15, 17) are provided at the longitudinal ends of the jib sections (5) adjoining one another in pairs, which elements allow the connection of each jib section (5) exclusively in a predetermined local assembly position relative to the other jib sections (5), wherein in the event of deviation from the predetermined assembly position the pairs of locating elements (15, 17) maintain the associated jib sections (5) at a distance apart which prevents the connection of the jib sections (5).
- A jib according to Claim 1, characterised in that the shape of all the coding/locating elements (15, 17) is the same and their coding is determined by the position in which the locating elements (15, 17) are mounted on the end faces.
- A jib according to Claim 1 or 2, characterised in that the jib sections (5) are in the form of a frame structure, each of which has a cross-member (13) at their longitudinal ends (7), which is situated opposite the cross-member (13) of the respectively adjacent jib section (5), and in that the locating elements (15, 17) are provided on the cross-members (13) in a position determining the coding.
- A jib according to any one of Claims 1 to 3, characterised in that the coding/locating elements associated with one another in pairs are in the form of hole-pin locating elements (15, 17) which can be inserted in the longitudinal direction of the jib.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4101291A DE4101291A1 (en) | 1991-01-17 | 1991-01-17 | DETACHABLE EXTENSION FOR A TOWER CRANE |
DE4101291 | 1991-01-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0503227A1 EP0503227A1 (en) | 1992-09-16 |
EP0503227B1 true EP0503227B1 (en) | 1994-11-30 |
Family
ID=6423214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92100529A Expired - Lifetime EP0503227B1 (en) | 1991-01-17 | 1992-01-14 | Sectional boom for a tower crane |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0503227B1 (en) |
AT (1) | ATE114608T1 (en) |
DE (2) | DE4101291A1 (en) |
ES (1) | ES2069320T3 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATA116793A (en) * | 1993-06-16 | 1998-07-15 | Boesch Berndt | CONSTRUCTION SITE CRANE |
DE4339564C2 (en) * | 1993-11-19 | 1996-03-28 | Movietech Filmgeraete Gmbh | Boom for camera dolly, crane or the like |
DE202005008602U1 (en) * | 2005-06-02 | 2006-10-19 | Liebherr-Werk Biberach Gmbh | boom |
CN103601083B (en) * | 2013-11-26 | 2016-02-03 | 中联重科股份有限公司 | Arm spike knot and comprise the tower crane of this arm spike knot |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3080068A (en) * | 1960-12-15 | 1963-03-05 | Alphie O Felkner | Sectional boom for cranes |
US3511388A (en) * | 1967-09-18 | 1970-05-12 | Manitowoc Co | Pin connection for elongate load supporting boom structure |
FR2049423A5 (en) * | 1969-06-10 | 1971-03-26 | Edilmac Spa |
-
1991
- 1991-01-17 DE DE4101291A patent/DE4101291A1/en not_active Withdrawn
-
1992
- 1992-01-14 AT AT92100529T patent/ATE114608T1/en not_active IP Right Cessation
- 1992-01-14 EP EP92100529A patent/EP0503227B1/en not_active Expired - Lifetime
- 1992-01-14 ES ES92100529T patent/ES2069320T3/en not_active Expired - Lifetime
- 1992-01-14 DE DE59200821T patent/DE59200821D1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE114608T1 (en) | 1994-12-15 |
EP0503227A1 (en) | 1992-09-16 |
DE4101291A1 (en) | 1992-07-23 |
ES2069320T3 (en) | 1995-05-01 |
DE59200821D1 (en) | 1995-01-12 |
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