DE102008020766B4 - Method for setting up a jib - Google Patents

Abstract

Method of equipping an adjustable jib on the main boom
characterized by the following process steps:
the jib (3) is attached to the head (6) of the main boom (5), the two luffing supports (8 and 9) lying flat on the jib (3),
the hoisting rope (14) is unwound from the main hoistway (15) of the mobile crane and connected to the connecting rod (13), which is permanently connected to the lower rocking support (9),
wherein both luffing supports are interconnected by a traction member strand (17), there is a winding of the hoist rope (14) on the hoist (15), wherein the rocking supports (8 and 9) upright,
then the connecting rod (13) with the flying crosshead (11) is connected and the hoist rope (14) unwound, so that the traverse (11) along a line from the fixed crossbar (12) to the tip (18) of the lower luffing support ( 9) upright,
while the pulley (19) is stretched, so that the hoist rope (14) in this position ...

Description

The The invention relates to a method for setting up a jib.

At the prepare of the jib, it is usual that the sheared Pulley for auxiliary boom adjustment for connection to the jib always by means of auxiliary crane or complex hoist or auxiliary cable guide to Auxiliary boom executed has been.

One considerable manual effort for the rope guide with an inspection of the Wippstützen, the Um- and Einscher was for it necessary.

From the US 4,383,616 A a crane is known with a main boom and an adjustable jib, wherein the jib is attached to the head of the main boom and has two rocker supports, which are interconnected by a connecting rod.

The upper rocker support is connected to the head of the jib, while the lower rocker support via a Connecting rod and a pulley with the Verstellhubwerk connected is.

The Erecting of the jib via several piston-cylinder units, the one with the foot of the Auxiliary boom or the lower rocker support cooperate.

Of the Invention is based on the object, the preparation of an adjustable subcarrier without the Inspection and without bringing the flying crossbar to Wippstütze is to perform.

Is solved this object according to the invention with the in claim 1 specified steps.

The Step sequence according to the invention should be described below with reference to the illustration in the drawings be explained in more detail, this schematically a mobile crane in the individual setup positions demonstrate.

1
The adjustable jib 3 for example, via an adapter 4 to the head 6 of the main boom 5 grown, but the adapter for the fulfillment of the task is not absolutely necessary. The cultivation takes place by suitable aids, z. B. auxiliary crane or forklift. The two rocker supports 8th and 9 lie flat on the jib for transport reasons 3 ,

The hoist rope 14 is from the main lift 15 of the mobile crane unwound and with the connecting rod 13 connected. This rod is durable with the lower rocker support 9 connected.

Both rocker supports are interconnected by a traction member strand 17 ( 2 ) connected.

By winding the hoist rope 14 on the hoist 15 now the rocking supports are aimed 8th and 9 on ( 2 ).

Subsequently, the connecting rod 13 with the flying crossbeam 11 connected ( 3 ). Will the hoist rope 14 unwound, the traverse aligns 11 along a line from the solid traverse 12 to the top 18 the lower luff support 9 out. The pulley 19 is curious. The hoist rope 14 Can in this position of the connecting rod 13 be decoupled.

In 4 the next step is shown.

The main boom 5 gets over the luffing cylinder 7 raised. At the same time the Verstellhubwerk 16 unwound, so that the distance between flying traverse 11 and solid traverse 12 increased. Finally, from a pre-determined main boom angle position the Verstellhubwerk 16 be rewound, so that the distance between flying traverse 11 and solid traverse 12 reduced. This raises the adjustable jib 3 from the ground, as it by means of another Zugkraftgliedstranges 10 with the upper rocker support 8th connected is ( 5 ).

1

undercarriage

2

superstructure

3

adjustable jib

4

adapter for adjustable jib

5

main boom

6

Boom head

7

luffing ram

8th

upper luffing

9

lower luffing

10

front credits strand

11

flying traverse

12

firm traverse

13

connecting rod

14

hoist rope

15

main hoist

16

Verstellhubwerk

17

Traction element strand

18

top the lower luff support

19

pulley for adjusting the jib

Claims (2)

Method for setting up an adjustable Auxiliary boom on the main boom, characterized by the following method steps: the jib ( 3 ) gets to the head ( 6 ) of the main jib ( 5 ), whereby the two rocking supports ( 8th and 9 ) flat on the jib ( 3 ), the hoist rope ( 14 ) is taken from the main lift ( 15 ) of the mobile crane and with the connecting rod ( 13 ), which permanently with the lower rocker support ( 9 ), wherein both luffing supports are interconnected by a traction member strand ( 17 ), there is a winding of the hoisting rope ( 14 ) on the hoist ( 15 ), whereby the rocking supports ( 8th and 9 ), then the connecting rod ( 13 ) with the flying crossbeam ( 11 ) and the hoist rope ( 14 ), so that the traverse ( 11 ) along a line from the solid crossbeam ( 12 ) to the top ( 18 ) of the lower luffing support ( 9 ), while the pulley ( 19 ), so that the hoist rope ( 14 ) in this position of the connecting rod ( 13 ), the main boom ( 5 ) is then transferred via the luffing cylinder ( 7 ) and the Verstellhubwerk ( 16 ) at the same time, so that the distance between flying traverse ( 11 ) and fixed traverse ( 12 ), finally, from a predetermined main boom angle position the Versteilhubwerk ( 16 ) are wound up again, so that the distance between the flying traverse ( 11 ) and fixed traverse ( 12 ), whereby the adjustable jib ( 3 ) lifts off from the ground, as it by means of another tensile member strand ( 10 ) with the upper rocker support ( 8th ) connected is. Method according to claim 1, characterized in that the jib ( 3 ) via an adapter ( 4 ) on the head ( 6 ) of the main jib ( 5 ) is attached.