NO138902B - LIFT CRANE, SPECIALLY FOR BUILDING PURPOSES, WITH A FREE PULLING CRANE ARM - Google Patents
LIFT CRANE, SPECIALLY FOR BUILDING PURPOSES, WITH A FREE PULLING CRANE ARM Download PDFInfo
- Publication number
- NO138902B NO138902B NO268/71A NO26871A NO138902B NO 138902 B NO138902 B NO 138902B NO 268/71 A NO268/71 A NO 268/71A NO 26871 A NO26871 A NO 26871A NO 138902 B NO138902 B NO 138902B
- Authority
- NO
- Norway
- Prior art keywords
- crane arm
- crane
- sections
- connections
- frame beams
- Prior art date
Links
- 230000007423 decrease Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Description
Foreliggende oppfinnelse angår en loftekran , spesielt for byggeformål, med en horisontalt utstikkende kranarm, uten ytre avstagning, på et tårn eller en mast, en lopevogn innrettet til å beveges langs kranarmen og som har en anordning for lofting og senking av en last, hvilken kranarm består av et rammefagverk med minst en ovre og to nedre langsgående rammebjelker og er oppdelt i et antall seksjoner med innbyrdes forskjellige bæreevne . The present invention relates to an overhead crane, especially for construction purposes, with a horizontally projecting crane arm, without external support, on a tower or a mast, a trolley arranged to move along the crane arm and which has a device for lofting and lowering a load, which crane arm consists of a frame truss with at least one upper and two lower longitudinal frame beams and is divided into a number of sections with mutually different bearing capacity.
Fra f.eks. DE-PS 809094 er kjent en loftekran med frittbærende arm. Denne arm oppviser imidlertid avtagende dimensjoner mot sin frie ende. Dette skyldes at påkjenningene på armen avtar mot dens frie ende, slik at armen ikke behover å ha samme stivhet i hele lengden. From e.g. DE-PS 809094 is a ceiling crane with a free-supporting arm. However, this arm exhibits decreasing dimensions towards its free end. This is because the stresses on the arm decrease towards its free end, so that the arm does not need to have the same stiffness throughout its length.
De varierende dimensjoner for kranarmens seksjoner er imidlertid en betydelig ulempe sett fra et produksjonsteknisk synspunkt, for-di det ikke kan anvendes de samme sveisejigger og den samme produksjonslinje for alle seksjonene. Dessuten kan det oppstå problemer med å oppnå en jevn lopebane for lopevognen dersom de stenger som inngår i kranarmen oppviser ulike ytre dimensjoner. The varying dimensions of the crane arm's sections are, however, a significant disadvantage from a production engineering point of view, because the same welding jigs and the same production line cannot be used for all the sections. In addition, problems can arise in achieving an even run path for the run truck if the rods included in the crane arm have different outer dimensions.
Formålet med den foreliggende oppfinnelse er å unngå de nevnte produksjonstekniske ulemper, samtidig med at kranarmen får varierende boyestivhet langs sin lengde. I henhold til oppfinnelsen er dette oppnådd ved at kranarmseksjonene har like ytre dimensjoner, idet forskjellen i bæreevne fremskaffes ved at i det minste de nedre rammebjeiker har samme ytre diameter samt en godstykkelse som avtar trinnvis fra den indre seksjon til den ytre, at forbindelsene mellom de nedre rammebjeiker i innbyrdes tilstotende seksjoner bare utgjores av et styre-element slik at lopevognen får en jevn lopebane, mens de ovre rammebjeiker på i og for seg kjent måte ved sine ender er utformet med flensforbindelser, tappforbindelser eller andre forbindelser innrettet til å overfore strekk-krefter. The purpose of the present invention is to avoid the aforementioned production technical disadvantages, while at the same time that the crane arm has varying buoyancy along its length. According to the invention, this is achieved by the crane arm sections having the same outer dimensions, the difference in load-bearing capacity being provided by at least the lower frame beams having the same outer diameter as well as a thickness that gradually decreases from the inner section to the outer, that the connections between the lower frame braces in mutually adjacent sections are only made up of a control element so that the running cart has a smooth running path, while the upper frame braces are designed in a manner known per se at their ends with flange connections, pin connections or other connections designed to transfer tension forces.
Oppfinnelsen lar seg på en enkel måte realisere, etter som standarden for såvel runde som kvadratiske og rektangulære ror er slik oppbygd at ror med et gitt yttermål fremstilles med forskjellige godstykkelser. The invention can be realized in a simple way, since the standard for round as well as square and rectangular rudders is structured in such a way that rudders with a given outer dimension are produced with different material thicknesses.
En utforelsesform for kranen i henhold til oppfinnelsen vil nå bli beskrevet under henvisning til vedfoyde tegninger, der: Fig. 1 viser, sett fra siden, en kran med en kranarm sammensatt av seksjoner, og fig. 2, 3 og 4 viser henholdsvis en sideprojeksjon, en endeprojeksjon og en planprojeksjon av en sådan seksjon, som kan kombineres med andre lignende seksjoner for sammenstilling av en hel kranarm. An embodiment of the crane according to the invention will now be described with reference to the attached drawings, where: Fig. 1 shows, seen from the side, a crane with a crane arm composed of sections, and fig. 2, 3 and 4 respectively show a side projection, an end projection and a plan projection of such a section, which can be combined with other similar sections to assemble a complete crane arm.
Kranen omfatter en mast 2 som er montert på et fundament 3, en svingekrans 4, en kranarm 5 sammensatt i dette tilfelle av fem seksjoner, en motvekt 6, loftemaskineri 7, svingemaskineri 8, The crane comprises a mast 2 which is mounted on a foundation 3, a slewing ring 4, a crane arm 5 composed in this case of five sections, a counterweight 6, loft machinery 7, swing machinery 8,
en lopevogn 9, en loftekrok 10, en lofteline 11 og lopevogns-maskineri 20. a lope wagon 9, a loft hook 10, a loft line 11 and lope wagon machinery 20.
En seksjon består av ovre bjelker 12 og nedre bjelker 13, sammenkoblet med stenger 14 og 15 som er anordnet vinkelrett på bjelkene, samt diagonalstenger 16 og 17. Såvel bjelkene 12 og 13 som stengene 14, 15, 16 og 17 kan utgjores av valsende profiler eller hullegemer. På fig. 3 er det vist ovre og nedre bjelker, henholdsvis 12 og 13 som består av firkantror med kvadratisk eller rektangulært tverrsnitt. Alle diagonale stenger har samme retning, sett i sideprojeksjon (fig. 2). A section consists of upper beams 12 and lower beams 13, connected by rods 14 and 15 which are arranged perpendicular to the beams, as well as diagonal rods 16 and 17. Both the beams 12 and 13 and the rods 14, 15, 16 and 17 can be made of rolling profiles or hollow bodies. In fig. 3 shows upper and lower beams, respectively 12 and 13, which consist of square tubes with a square or rectangular cross-section. All diagonal bars have the same direction, seen in side projection (fig. 2).
Tegningen viser en seksjon som har rektangulært tverrsnitt. The drawing shows a section which has a rectangular cross-section.
Oppfinnelsen omfatter imidlertid også seksjoner med annet tverrsnitt, f.eks. trekantet med en spiss vendt oppover eller nedover. Det er imidlertid en forutsetning at alle diagonaler i en sideprojeksjon av seksjonen har samme retning. However, the invention also includes sections with a different cross-section, e.g. triangular with a point facing upwards or downwards. However, it is a prerequisite that all diagonals in a side projection of the section have the same direction.
De ovre bjelker 12 er forsynt med flenser 18 for sammenkobling med boltforbindelser mellom seksjonene. De nedre bjelker 13 er forsynt med styreinnretninger bestående av styretapper 19 for sentrert innforing i en bjelke på en tilgrensende seksjon. The upper beams 12 are provided with flanges 18 for connection with bolted connections between the sections. The lower beams 13 are provided with control devices consisting of control pins 19 for centered insertion in a beam on an adjacent section.
Montasjen av en kranarm i henhold til oppfinnelsen blir enklere enn ved kjente kranarmer. Årsaken til dette er at de nedre .bjelker bare overforer trykk-krefter, hvorved koblingsforbindelser 'i vanlig mening ikke er nodvendig. Det behoves således bare en anordning 19 for sentrering. Herved oppnås også den fordel at de nedre bjelker utvendig blir helt jevne, hvorved de kan utgjore lopebane for lopevognen 9. The assembly of a crane arm according to the invention is easier than with known crane arms. The reason for this is that the lower beams only transmit pressure forces, whereby connecting connections in the usual sense are not necessary. Thus, only one device 19 is needed for centering. This also achieves the advantage that the lower beams are completely smooth on the outside, whereby they can form a running track for the running cart 9.
Samtlige seksjoner for en kranarm har utvendig samme mål. Dette er en forutsetning for serieproduksjon. Derved blir det nemlig mulig å anvende samme tilvirkningslinje, samme sveiseverktoy og bvrig utrustning for alle seksjonene. All sections for a crane arm have the same external dimensions. This is a prerequisite for series production. This makes it possible to use the same production line, the same welding tools and the necessary equipment for all the sections.
Alle seksjonene tilvirkes og sammensettes slik at kranarmen i sin helhet blir stort sett likt utnyttet. Ved en hensiktsmessig utforelsesform av en seksjon utgjores samtlige stenger av ror eller andre hullegemer, hvorved forskjellige bæreevne oppnås ved at utvendige eller innvendige tverrsnittsdimensjoner for alle stenger av et visst slag er like, mens bæreevnen for forskjellige seksjoner varieres ved at stengenes godstykkelse velges forskjellig. All the sections are manufactured and assembled so that the crane arm as a whole is largely equally utilized. In an appropriate embodiment of a section, all rods are made of rudders or other hollow bodies, whereby different load-bearing capacities are achieved by the external or internal cross-sectional dimensions of all rods of a certain type being the same, while the load-bearing capacity for different sections is varied by choosing different thicknesses of the rods.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE00978/70A SE337089B (en) | 1970-01-27 | 1970-01-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO138902B true NO138902B (en) | 1978-08-28 |
NO138902C NO138902C (en) | 1978-12-06 |
Family
ID=20257402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO71268A NO138902C (en) | 1970-01-27 | 1971-01-26 | LIFT CRANE, SPECIAL FOR BUILDING PURPOSES, WITH A FREE PULLING CRANE ARM |
Country Status (9)
Country | Link |
---|---|
US (1) | US3706285A (en) |
CA (1) | CA945515A (en) |
CH (1) | CH521920A (en) |
DE (1) | DE2103667A1 (en) |
FI (1) | FI49391C (en) |
FR (1) | FR2077350B1 (en) |
GB (1) | GB1310635A (en) |
NO (1) | NO138902C (en) |
SE (1) | SE337089B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3851767A (en) * | 1970-02-13 | 1974-12-03 | Richier Sa | Tower cranes |
US4489659A (en) * | 1979-01-10 | 1984-12-25 | Hitachi, Ltd. | Truss-type girder for supporting a movable body |
EP0040387A3 (en) * | 1980-05-16 | 1982-03-31 | Khadem, Mustafa, Ing. grad. | Crane |
CA1179982A (en) * | 1981-06-24 | 1984-12-27 | Lembit Vaerk | Boom extension for crane |
DE3136102C2 (en) * | 1981-09-11 | 1985-11-21 | Mauer-Blitz Bau-Service GmbH, 4670 Lünen | Small crane for laying in layers, especially large-format bricks |
DE3246217A1 (en) * | 1982-12-14 | 1984-06-14 | Gottwald GmbH, 4000 Düsseldorf | Lattice jib for a jib crane |
DE3926488A1 (en) * | 1989-08-10 | 1991-02-14 | Man Ghh Krantechnik | TOWER TURNING CRANE |
DE9107158U1 (en) * | 1991-06-11 | 1991-07-25 | Frank Abels Consulting & Technology GmbH, 3042 Munster | Dismountable and movable small crane for use on construction sites |
ITMI20031503A1 (en) * | 2003-07-22 | 2005-01-23 | San Marco Internat S R L | TOWER CRANE WITH ARM AND CONTRABRACC WITHOUT SUPPORTING TIRES |
DE102006032321A1 (en) * | 2006-07-11 | 2008-01-17 | Wolffkran Gmbh | Method for assembling a tower crane |
ES2397325B1 (en) * | 2011-07-28 | 2013-11-15 | Linden Comansa, S.L. | FEATHER-COUNTERPLUMA STRUCTURE FOR TOWER CRANE WITHOUT STRIPS. |
US9096331B2 (en) * | 2013-09-12 | 2015-08-04 | The Boeing Company | Method and apparatus for supporting an aircraft structure during repair |
DE202017107301U1 (en) * | 2017-09-01 | 2018-12-07 | Liebherr-Werk Biberach Gmbh | Tower Crane |
CN113460895A (en) * | 2021-06-29 | 2021-10-01 | 徐州重型机械有限公司 | Variable-strength arm support |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2335522A (en) * | 1943-02-20 | 1943-11-30 | Letourneau Inc | Factory jib crane |
US2575564A (en) * | 1949-11-14 | 1951-11-20 | Rinkel Silas | Motor lift attachment |
FR1377553A (en) * | 1963-09-27 | 1964-11-06 | Cart boom for cranes | |
NL6617808A (en) * | 1966-12-19 | 1968-06-20 | ||
US3445004A (en) * | 1967-02-01 | 1969-05-20 | Bucyrus Erie Co | Telescopic cantilevered boom |
US3433459A (en) * | 1967-05-02 | 1969-03-18 | Federal Sign And Signal Corp | Load handling apparatus |
BE709986A (en) * | 1968-01-26 | 1968-05-30 | ||
GB1200578A (en) * | 1969-05-19 | 1970-07-29 | Edilmac Spa | Improvements in or relating to jib cranes provided with load carriages |
-
1970
- 1970-01-27 SE SE00978/70A patent/SE337089B/xx unknown
-
1971
- 1971-01-18 US US107076A patent/US3706285A/en not_active Expired - Lifetime
- 1971-01-19 CA CA103,065A patent/CA945515A/en not_active Expired
- 1971-01-25 FI FI187/71A patent/FI49391C/fi active
- 1971-01-25 FR FR717102332A patent/FR2077350B1/fr not_active Expired
- 1971-01-26 NO NO71268A patent/NO138902C/en unknown
- 1971-01-26 CH CH110971A patent/CH521920A/en not_active IP Right Cessation
- 1971-01-27 DE DE19712103667 patent/DE2103667A1/en active Pending
- 1971-04-19 GB GB2046971A patent/GB1310635A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FI49391B (en) | 1975-02-28 |
FR2077350B1 (en) | 1974-02-22 |
CA945515A (en) | 1974-04-16 |
DE2103667A1 (en) | 1971-08-05 |
CH521920A (en) | 1972-04-30 |
FR2077350A1 (en) | 1971-10-22 |
SE337089B (en) | 1971-07-26 |
GB1310635A (en) | 1973-03-21 |
FI49391C (en) | 1975-06-10 |
US3706285A (en) | 1972-12-19 |
NO138902C (en) | 1978-12-06 |
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