GB820811A - Improvements in overhead grabbing crane - Google Patents
Improvements in overhead grabbing craneInfo
- Publication number
- GB820811A GB820811A GB33738/56A GB3373856A GB820811A GB 820811 A GB820811 A GB 820811A GB 33738/56 A GB33738/56 A GB 33738/56A GB 3373856 A GB3373856 A GB 3373856A GB 820811 A GB820811 A GB 820811A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rope
- drum
- grab
- line
- closing
- 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
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/30—Rope, cable, or chain drums or barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C7/00—Runways, tracks or trackways for trolleys or cranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/26—Rope, cable, or chain winding mechanisms; Capstans having several drums or barrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works
- B66C2700/012—Trolleys or runways
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/01—Winches, capstans or pivots
- B66D2700/0125—Motor operated winches
- B66D2700/0166—Winches with multiple drums or with drums with multiple parts of different diameter
- B66D2700/0175—Winches with multiple drums or with drums with multiple parts of different diameter with adjacent drums mounted on a single shaft with a common coupling member
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
820,811. Opening and closing grabs; winding. McKIERNAN - TERRY CORPORATION. Nov. 5, 1956, No. 33738/56. Classes 78 (4) and 78 (5). The grab holding and closing ropes of an overhead grabbing crane are in one continuous length terminating at one end in a storage reel so that fresh rope may be fed into the system to replace worn rope taken out at the other end, without changing all of the rope. Grab changing is also facilitated. A pulley 10, Fig. 1, incorporated in the hoisting drum 11 with its axis at right angles to that of the drum and normally locked against rotation by a rope clamp 17, divides the rope into holding and closing lines 12, 13. Line 12 passes from the drum 11 via pulleys 18, 19, 20, 21, 22 and a releasable anchor 15 to the storage reel 16, and line 13 via pulleys 23-31 inclusive to the grab closing drum 14. Pulleys 19, 21, 24, 30 are on a trolley 33 movable along the jib by a rope 34, and pulleys 20 and 25-29 are on the grab 32. Most wear occurs where line 13 passes over pulleys 25-29, and by fixing the grab in an open position, then running all the rope off the drum 11 so that the line at this point passes round the pulley 10 only, and releasing the clamps 15, 17, fresh rope may be fed into the system from the reel 16 and worn rope removed from the drum 14. Reeving a fresh grab.-The grab may be changed by disconnecting the rope at the drum 14 and connecting its end to a reel 52 carrying a rope with a removable tag line which may then be fed into the system, while taking up the slack on the reel 16, until the tag line is in position to change first the closing line, then the holding line on to a new grab ready placed in position with tag lines threaded. Winding.-Fig. 7 shows the arrangement of the pulley 10 in the drum 11. Shoulders 41 on removable covers 43 normally guide the two reaches of the rope towards the middle of the drum, but on removal of the covers 43 the rope takes up the reeving position shown at 12, 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33738/56A GB820811A (en) | 1956-11-05 | 1956-11-05 | Improvements in overhead grabbing crane |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB33738/56A GB820811A (en) | 1956-11-05 | 1956-11-05 | Improvements in overhead grabbing crane |
Publications (1)
Publication Number | Publication Date |
---|---|
GB820811A true GB820811A (en) | 1959-09-30 |
Family
ID=10356821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33738/56A Expired GB820811A (en) | 1956-11-05 | 1956-11-05 | Improvements in overhead grabbing crane |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB820811A (en) |
-
1956
- 1956-11-05 GB GB33738/56A patent/GB820811A/en not_active Expired
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