IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0632077
(1975-11-14)
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발명자
/ 주소 |
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출원인 / 주소 |
- Morrison-Knudsen Company Inc.
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대리인 / 주소 |
Shanley, O'Neil and Baker
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인용정보 |
피인용 횟수 :
2 인용 특허 :
0 |
초록
▼
A device for lifting and positioning sheet steel piling of great length which eliminates permanent distortion of the piling during lifting and handling comprising an elongated openwork rigid structural member or framework having a plurality of electromagnets on its underside for picking up a sheet p
A device for lifting and positioning sheet steel piling of great length which eliminates permanent distortion of the piling during lifting and handling comprising an elongated openwork rigid structural member or framework having a plurality of electromagnets on its underside for picking up a sheet pile and moving it into vertical position contiguous to a pile already driven so that the two piles can be interconnected.
대표청구항
▼
1. A device for supporting a long flexible sheet metal pile while moving the pile from a horizontal storage position to an upright position for interlocking connection with an adjacent driven pile, the device when considered as resting on the ground comprising (a) an elongated rigid, open framewo
1. A device for supporting a long flexible sheet metal pile while moving the pile from a horizontal storage position to an upright position for interlocking connection with an adjacent driven pile, the device when considered as resting on the ground comprising (a) an elongated rigid, open framework of polygonal cross section formed of a plurality of longitudinal structural members extending the length of the framework and bracing members joined to the longitudinal structural members and extending transversely thereto, (b) a plurality of electromagnetic means carried by the framework along the lowermost side of the framework, (c) a pile engaging surface on each electromagnetic means facing downwardly, (d) pivotal support means between each electromagnetic means and the framework for supporting the electromagnetic means with the pile engaging surface movable into surface engagement with the surface of a pile for optimum magnetic holding effect, the pivotal support means holding each electromagnet for limited movement around an axis parallel to the longitudinal axis of the framework and against appreciable rotational movement in a plane normal to a vertical axis through the center of the electromagnetic means, (e) means disposed at points spaced along the length of the framework and carried by the upper members of the framework for attachment of lifting cables, and (f) means carried by one end of the framework for suspending the framework and a pile held by the framework with the pile disposed as near as practicable to a desired upright position for movement into interlocking engagement with an adjacent driven pile. 2. A device as claimed in claim 1 in which (g) the framework is triangular in cross section with horizontal bracing members extending between two apices and the third apex is disposed below the other two, and (h) the electromagnetic means is supported contiguous to and below the third apex. 3. A device as claimed in claim 1 in which (g) the framework has a longitudinal, vertical plane of symmetry, (h) means (f) is a bracket carried by one end of the framework and disposed in the longitudinal vertical plane of symmetry, and (i) the bracket has a plurality of suspension cable connection means vertically spaced along the bracket, each cable connection means being located at a point such that when the framework is suspended supporting a pile, a cable connection means will be substantially directly over the center of gravity of the combined framework and pile structure, depending on the length of the pile. 4. A device as claimed in claim 1 in which (g) means (e) comprise a pivoted connection means at each of two points along the length of the framework, each pivoted connection means being intermediate one end of the framework and the center of the framework, (h) each pivoted connection means comprising a tubular member rotatably supported by and encasing a transversely extending horizontal bracing member. 5. A device as claimed in claim 1 including (g) leg means arranged along the length of the framework and extending below the electromagnetic means when the framework is resting on the ground, and (h) means associated with the leg means for retraction of the leg means above the electromagnetic means when the framework is suspended for lifting a pile. 6. A device as claimed in claim 5 in which (i) means (h) includes tubular means which telescopically receives leg means (g). 7. A device as claimed in claim 6 in which (j) the framework is triangular in cross section with two apices disposed in a horizontal plane and the third apex is disposed below the other two, and (k) the tubular means and the associated leg means extend parallel to the lower sides of the triangle formed by the framework in cross section so that with the leg means extended, the sides of the triangle and the legs form an X. 8. A device as claimed in claim 1 including (g) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 9. A device as claimed in claim 2 in which (i) the framework has a longitudinal, vertical plane of symmetry, (j) means (f) is a bracket carried by one end of the framework and disposed in the longitudinal vertical plane of symmetry, and (k) the bracket has a plurality of suspension cable connection means vertically spaced along the bracket, each cable connection means being located at a point such that when the framework is suspended supporting a pile, a cable connection means will be substantially directly over the center of gravity of the combined framework and pile structure, depending on the length of the pile. 10. A device as claimed in claim 2 in which (i) means (e) comprise a pivoted connection means at each of two points along the length of the framework, each pivoted connection means being intermediate one end of the framework and the center of the framework, (j) each pivoted connection means comprising a tubular member rotatably supported by and encasing a transversely extending horizontal bracing member. 11. A device as claimed in claim 2 including (i) leg means arranged along the length of the framework and extending below the electromagnetic means, and (h) means associated with the leg means for retraction of the leg means above the electromagnetic means when the framework is suspended for lifting a pile. 12. A device as claimed in claim 11 in which (i) means (h) include tubular means which telescopically receive leg means (i), and (j) the tubular means and the associated leg means extend parallel to the lower sides of the triangle formed by the framework in cross section so that with the leg means extended, the sides of the triangle and the legs form an X. 13. A device as claimed in claim 2 including (i) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 14. A device as claimed in claim 3 in which (j) means (e) comprise a pivoted connection means at each of two points along the length of the framework, each pivoted connection means being intermediate one end of the framework and the center of the framework, (k) each pivoted connection means comprising a tubular member rotatably supported by and encasing a transversely extending bracing member. 15. A device as claimed in claim 3 including (j) leg means arranged along the length of the framework and extending below the electromagnetic means when the framework is resting on the ground, and (k) means associated with the leg means for retraction of the leg means above the electromagnetic means when the framework is suspended for lifting a pile. 16. A device as claimed in claim 15 in which (l) means (k) include tubular means which telescopically receive leg means (j), (m) the framework is triangular in cross section with horizontal bracing members extending between two apices and the third apex is disposed below the other two, and (n) the tubular means and the associated leg means extend parallel to the lower sides of the triangle formed by the framework in cross section so that with the leg means extended, the sides of the triangle and the legs form an X. 17. A device as claimed in claim 3 including (j) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 18. A device as claimed in claim 3 including (j) a safety chain having one end connected to the framework at a point intermediate the ends thereof and the other end free, the length of the chain being such as to permit the chain to be passed under and around a pile held by electromagnetic means, and (k) fastening means associated with the framework to receive and hold the free end of the chain passing under and around the pile. 19. A device as claimed in claim 4 including (i) leg means arranged along the length of the framework and extending below the electromagnetic means when the framework is resting on the ground, and (j) means associated with the leg means for retraction of the leg means above the electromagnetic means when the framework is suspended for lifting a pile. 20. A device as claimed in claim 19 in which (k) means (j) include tubular means which telescopically receive leg means (i) (l) the framework is triangular in cross section with horizontal bracing members extending between two apices and the third apex is disposed below the other two, and (m) the tubular means and the associated leg means extend parallel to the lower sides of the triangle formed by the framework in cross section so that with the leg means extended, the sides of the triangle and the legs form an X. 21. A device as claimed in claim 4 including (i) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 22. A device as claimed in claim 5 including (i) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 23. A device as claimed in claim 5 including (i) a safety chain having one end connection to the framework at a point intermediate the ends thereof and the other end free, the length of the chain being such as to permit the chain to be passed under and around a pile held by electromagnetic means, and (j) fastening means associated with the framework to receive and hold the free end of the chain passing under and around the pile. 24. A device as claimed in claim 7 including (l) flexible restraining means connecting the electromagnetic means and the framework on the side of the electromagnetic means toward the suspension end of the framework, the flexible restraining means acting to permit limited movement of the electromagnetic means in a direction along the length of the framework but restraining the electromagnetic means against extreme movement in a direction along the length of the framework and away from the suspension end. 25. A device as claimed in claim 7 including (l) a safety chain having one end connected to the framework at a point intermediate the ends thereof and the other end free, the length of the chain being such as to permit the chain to be passed under and around a pile held by electromagnetic means, and (m) fastening means associated with the framework to receive and hold the free end of the chain passing under and around the pile.
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