DE338577C - Adjustable boom crane - Google Patents
Adjustable boom craneInfo
- Publication number
- DE338577C DE338577C DE1920338577D DE338577DD DE338577C DE 338577 C DE338577 C DE 338577C DE 1920338577 D DE1920338577 D DE 1920338577D DE 338577D D DE338577D D DE 338577DD DE 338577 C DE338577 C DE 338577C
- Authority
- DE
- Germany
- Prior art keywords
- boom
- crane
- rope
- drum
- adjustable
- 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
Links
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
- B66C23/06—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 with jibs mounted for jibbing or luffing movements
- B66C23/08—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 with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
- B66C23/10—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 with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0307—Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Description
Die Erfindung betrifft einen Kran mit verstellbarem Ausleger, dessen Fußpunkt beim Einziehen oder Auslegen gehoben oder gesenkt wird. Zweck der Erfindung ist, ein schnelles Ein- und Ausziehen des Auslegers mit möglichst geringem Kraftaufwand' herbeizuführen. Dies wird dadurch erreicht, daß das Windwerk für das Einziehseil des Auslegers so mit einer Vorrichtung zum HebenThe invention relates to a crane with an adjustable boom, the base of which when Pulling in or out is raised or lowered. Purpose of the invention is a to bring about rapid retraction and extension of the boom with as little effort as possible '. This is achieved in that the winch for the pull-in rope of the boom so with a device for lifting
ίο und Senken des Auslegerfußpunktes verbunden ist, daß beim Einziehen ein Kräfteausgleich stattfindet.ίο and lowering the boom base connected is that when pulling in, a balance of forces takes place.
Ein Ausführungsbeispiel des Erfindungsgegenstandes ist schematisch auf· der Zeich- nung dargestellt.An embodiment of the subject matter of the invention is shown schematically on the drawing shown.
Der Fußpunkt F des verstellbaren Auslegers ist senkrecht im Krangerüst geführt. Er wird flaschenzugartig von einem Seil S1 gehalten, das zur Trommel T1, die mit dem Auslegerstellwerk auf der Kranbühne verbunden ist, geleitet ist»The base point F of the adjustable boom is guided vertically in the crane frame. It is held in the manner of a pulley block by a rope S 1 , which is led to the drum T 1 , which is connected to the jib signal box on the crane platform »
Zum Plalten des Auslegers dient das Seil S«,
das in der dargestellten Skizze vom Krangerüst zum Ausleger, dann zurück über eine
Rolle des Krangerüstes zur Trommel T2 des Auslegerstellwerks geführt ist. Die Trommel
T2 wird in umgekehrtem Sinne umschlungen wie die Trommel T1.
1 Da beide Trommeln durch den Antrieb miteinander gekuppelt oder auf ein und derselben
Achse aufgekeilt sind, bewirkt diese entgegengesetzte Umschlingung einen Ausgleich
der in dem Einziehseil und der Fußpunktführung auftretenden Kräfte. Die am Fuße des Auslegers, beim Einziehen z. B. frei werdenden
Kräfte werden über die Trommel T1 zur Trommel T2 übertragen und dort beim
Aufwinden des Einziehseiles nutzbar gemacht. Beim Auslegen des Auslegers werden umgekehrt
die in dem Einziehseil frei werdenden *o Kräfte über das Seil S2 an die Trommel T2
und über die Trommel T1 an das Seil S1-weitergegeben
und zum Anheben des Auslegerfußpunktes herangezogen.To pleat the boom, the rope S ″ is used, which in the sketch shown is led from the crane frame to the boom and then back over a roll of the crane frame to the drum T 2 of the jib signal box. The drum T 2 is wrapped around in the opposite sense as the drum T 1 .
1 Since both drums are coupled to one another by the drive or are wedged on one and the same axis, this opposite looping effects a compensation of the forces occurring in the pull-in rope and the base point guide. The at the foot of the boom, when drawing in z. B. forces released are transmitted via the drum T 1 to the drum T 2 and made available there when the pull-in rope is wound up. Conversely, when the jib is laid out, the forces released in the pull-in rope are passed on via the rope S 2 to the drum T 2 and via the drum T 1 to the rope S 1 and used to raise the boom base.
Durch die Anordnung der Seile, des Windwerks und die Wahl der Trommeldurchmesser läßt sich für bestimmte Auslegerstellungen ein völliger Kräfteausgleich im Stellwerk erzielen. Da sich die Kräfte aber mit der Bewegung des Auslegers verändern, wird bei den übrigen Auslegerstellungen der Kräfteausgleich nicht ohne weiteres vorhanden sein.Through the arrangement of the ropes, the winch and the choice of drum diameter a complete balance of forces in the signal box can be achieved for certain boom positions. However, since the forces change with the movement of the boom, there is a balance of forces in the other boom positions not be readily available.
Man erreicht aber auch für diese Stellungen einen annähernden Kräfteausgleich, wenn man die Trommelrillung derart spiralförmig ausführt, daß sich die durch die beim Anziehen des Einziehseiles und die Fußpunktverlegung an den Achsen der Trommeln T2 bzw. T1 ergebenden Drehmomente bei jeder Auslegerstellung annähernd ausgleichen. Es würden sich hierbei z. B. Trommelrillungen ergeben, wie sie auf der Zeichnung schematisch dargestellt sind.However, an approximate balance of forces can also be achieved for these positions if the drum grooves are designed in such a spiral that the torques resulting from the tightening of the pull-in rope and the relocation of the base on the axes of the drums T 2 and T 1 are approximately equalized in every boom position. It would be here z. B. drum grooves, as shown schematically in the drawing.
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE338577T | 1920-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE338577C true DE338577C (en) | 1921-06-21 |
Family
ID=6222703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1920338577D Expired DE338577C (en) | 1920-05-22 | 1920-05-22 | Adjustable boom crane |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE338577C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2469374A1 (en) * | 1979-11-12 | 1981-05-22 | Spera Claudio | TOWER CRANE COMPRISING A POLYCENTRIC TRAJECTORY BOOM |
-
1920
- 1920-05-22 DE DE1920338577D patent/DE338577C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2469374A1 (en) * | 1979-11-12 | 1981-05-22 | Spera Claudio | TOWER CRANE COMPRISING A POLYCENTRIC TRAJECTORY BOOM |
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