US 3392818 A
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July 16, 1968 R. BASCHANT SHIP UNLOADING DEVICEy Filed Nov. 25, 1966 United States Patent Oflce 3,392,818 Patented July 16, 1968 ABSTRACTA OF THE DISCLOSURE In a ,derrick, the hoisting cable winches are used as counte-rweights on a bell crank balance arm which supports the main jib or boom. I
A ship unloading device is known. which is mounted on a pontoon. Said unload-ing device consists of a 4mobile supportingframe to the lower platform of which a vbalance arm is hinged. Said balancearm is held by .means of a hoisting cable engaging therewith at about half its height, said cable leading to a winch arranged on the platform of the supporting frameHalfway up said balance arm is hinged an arc-shaped jib, `held by a hosting cable which also passes over the apex of said balance arm to a winch arranged on the oor of the supporting frame. Mounted on the jib is a double-ended lever, the two ends of which are connected by hoisting cablesto an adjusting device. One end of the double-ended lever is mounted in a sliding guide on the vertical conveyor which in turn is hinged to said jib. This device has the ability, when the lowerable vertical conveyor is set, for example, on `the ships bottom as is possible at low and high tide or when the position of the sh-ip is changed, to load the structure of said ship with the weight of the vertical conveyor and, additionally, with a portion of the weight of the jib.
The object of this invent-ion is to produce a ship unloading device whieh, when the vertical conveyor is set up, loads the structure of the ship not with the whole, but at the most with only a portion of the weight of the vertical conveyor and of the jib.
The problem is, therefore, -to bring 4about the best possible equilibrium in the unloading unit and to reduce the ballast. Finally, the vertical conveyor is to -be capable of being brought into all possible practical unloading positions arising by means of the simplest possible design ofthe jib supporting it.
This invention proceeds from a ship unloading installation having a main jib which projects over the water and carries, adjustably, a vertical conveyor, said main jib being mounted so as to pivot about a horizontal axis and on a balance arm hinged to the supporting frame of the installation and capable of adjustment in a vertical plane; said installation also having a vertically pivoted belt jib projecting from the supporting frame over the land, adjustable Winches being provided for the hoisting cables leading to the jib over the water, to the balance arm, and to the lbelt ji-b over the land.
The advantage of the invention is that, when the vertical conveyor is set up, it does not load the ships bottom with its own weight and also with a portion of the weight of the jib. Finally, there is also the advantage that the vertical conveyor with the jib can be brought practically into the space behind the wall of the dock merely by a pivoting movement.
An example of embodiment of the invention is explained hereinafter by means of the schematic side elevation illustrated in the drawing.
By the wall of dock 1 lies a ship 2, of which only t-h external profile and the profile of the hold 3 are shown.
Along the wall of the dock, and running on tracks 4,
is supporting frame 5, the lower portion of which is in the form of a gate through which vehicles can pass. Freight cars 7 can move through said gate. Additional freight cars 8 can also move externally of said gate.
-Pedestal 5a of the supporting frame carries, in a bearing 9, a'triangular balance arm 1'0 consist-ing of three a-rms 11,-12 and 13, a connecting strut 14a and a hoisting cable 14b, thus constituting in practice a bell crank.
Mounted at the end of lower arm 11 in bearing 15 is a main belt jib 16 projecting `over the water. Attached to the front en d ofv said jib in bearing 40 is vertical conveyor 17`, the angular position of which is adjusted by a hydraulic drive 18, one end of which is joined by a hinge 1-9 to jib 16, while the other end is joined by a hinge 20 to vertical conveyor 17. vControl cabin 21 is attached to vertical i conveyor 17 in such a manner that the driver can observe the unloading process.
- Belt jib 16 is held by means 'of a block and tackle, the-ends of which are led over cable pulleys 23 at the end of arm 13 to two Winches 24 and 25 at the end of upper faim 12. Said Winches, in conjunction with still other Winches, form counterweight 26 for vertical conveyor 17 arid jib 16. In this connection, balance arm 10V is so designed, and counterweight 26 is so arranged, that at the outermost (extreme) position of said vertical conveyor, shown 'by way of example at 17a, the counterweight is also in its outermost position 26a, in which arm 12 is almost horizontal. In this connection, it is assumed that vertical conveyor 17 moves from position 17 to position 17a at the same level. On the other hand, if vertical conveyor 17 is moved towards the land at approximately the same level, counterweight 26 finally approaches nearer to the perpendicular passing through pivot bearing 9. This means that when vertical conveyor 17 is moved, at approximately the same level, from its extreme position over the land t-o its extreme position over the water, counterweight 26 is moved in such a manner that the -overall center of gravity of the installation is not substantially displaced.
Also arranged in counterweight 26 is winch 27 for hoisting cable 2S which passes over pulley 29, at the free end of lower arm 11, to pulleys 30 attached to supporting frame 5. End 31 of hoisting cable 28 is attached to the end of arm 11.
It is assu-med that cable winch 24 is used alone for raising :and lowering belt jib 16, the latter pivoting about bearing 15. Furthermore, -the position of the jib is not altered. On the other hand, if jib 16 is to be moved forwards or backwards, cable winch 27 is wound in or out.
However, if when belt jib 16 is moved forwards or backwards, vertical conveyor 17 is required to remain at the same height, winch 25 is also wound appropriately in or out. For example, if winch 27 is wound in, jib 16 will be forced to the left. If hoisting cable 22 were not altered, vertical conveyor 17 would be raised. However, in order to maintain the vertical conveyor at the same height, cable is let out from winch 25. Cable hoists 27 and 25 may be coupled together mechanically or electrically in such a manner that the crew is required to carry out only one switching operation to move vertical conveyor 17 while maintaining it at the same level.
The retention of balance arm 10 by means of hoisting cable 28 has the advantage that, when vertical conveyor 17 is set up, it remains balanced by counterweight 26, since hoisting cable Z2 remains taut. Cable 28, on the other hand, goes slack. For the purpose of unloading lateral area 3a of hold 3, vertical conveyor 17 may be brought into position 17b shown in dotted lines. To this end, hydraulic drive 18 is moved appropriately, and the jib is lowered to position 16a. In a similar manner, the vertical conveyor may also be inclined in the other direction to unload hold area 3b on the other side.
in Vwhich, it canbe pulled -in almost to the.plane of ,the
dock wall. Thus supportingframe 5 can be moved from hatch to hatch even when the superstructure of the ship is very high.
Hinged to the rear end of belt jib 16 in bearings 32 is an intermediate conveyor belt 33, the other end 34 of `which is supported on a belt jib 35 projecting over the land, so that it may be placed over a freight car 8. Said belt jib 35 is hinged at 'oneA end, at `36, Yto supporting frame 5. Its other end is held by a hoisting cable 37 whose winch -may also be accommodated in counterweight 2.6.A Connected Vto the inner, lower end of belt jib 35 is ayerticalchute 38 which delivers the material to belts 39. However,said material may also be moved in another manner,I and may be discharged, for example, into freight cars 7, 8 or the like, The suspension of belt jib 35 provides an additional counterweight by its own weight and that of the intermediate conveyor belt. I,
Having now described theJ means by which the objects of the invention are obtained. I claim: z
1. In a ship unloading device comprising a supporting frame, a balance arm carried by said frame and swingable in a vertical plane, a main belt jib pivotally secured to said balance arm for extending over a ship, a vertical conveyor carried by the free end of said main belt jib, a vertically pivotal belt jib joined to said frame and extending landwise, and hoisting cable means for actuating the main belt jib, the vertically pivoted belt jib and the balance arm, the improvement in which said balance arm is triangular with a lower arm attached to said main belt jib, and an upper arm joined to said hoisting cable means and forming a counterweight.
2. In a device as in claim 1, said balance arm forming bellr crank opened Ato kthe landside of the device, and a strut extending between said lower `arm and said upper arm.
3. In a device as in claim 2, further comprising a support arm secured to said balance arm and extending shipwise over said main belt jib, and said hoisting means including a cable guided by said support varm and attached to said main belt jib. j
4. A 'device as'inclaim l3, said 'hoisting means further including a balancearm adjusting cable'attached to said lower arm. ,f`; ,f 'I v 5. A device as in claim 4, 'said hoisting means further comprising hoisting cable winchmeans for said main belt jib carried by said balance arm andforming part of said counterweight. v i v 6.1A device as in claim 5, furthercomprising winch means for said balance arm adjusting cable and forming part of said counterweight. Y
7. A device as in claim 6, further comprising an intermediate conveyor belt between lsaid main jib belt and said vertically pivoted belt jib. Y
-;.=8. A device as lin claim 7, further comprising winch control means joined to said winchmeans for holding said vertical conveyor at substantially the same elevation a said balance arm is moved.
References Cited UNITED STATES PATENTS 7/ 1922 Kininmonth .214-14 XR 9/1967 Ludwig 212-21 XR