NO149279B - BOMLOEFTEKRAN. - Google Patents
BOMLOEFTEKRAN. Download PDFInfo
- Publication number
- NO149279B NO149279B NO782315A NO782315A NO149279B NO 149279 B NO149279 B NO 149279B NO 782315 A NO782315 A NO 782315A NO 782315 A NO782315 A NO 782315A NO 149279 B NO149279 B NO 149279B
- Authority
- NO
- Norway
- Prior art keywords
- boom
- sheaves
- line
- lifting
- run
- Prior art date
Links
- 238000010276 construction Methods 0.000 description 4
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
- B66C23/005—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 with balanced jib, e.g. pantograph arrangement, the jib being moved manually
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Materials For Medical Uses (AREA)
Description
Den foreliggende oppfinnelse vedrører en bomløftekran i hvis dreievogn, som er dreibar om en vertikal aksel, det er lagret en leddet bom som er svingbar i vertikalplanet og som i sin ende har lineskiver hvis aksler ligger i avstand fra hverandre og via hvilke løfteliner løper fra en linetrommel i kranens stamme til et lastbæreorgan, og det mellom lineskivene i bommens ende og linetrommelen er anordnet mellomskiver hvis aksler likeledes ligger i avstand fra hverandre. The present invention relates to a boom lifting crane in whose slewing carriage, which is rotatable about a vertical axis, there is stored an articulated boom which is pivotable in the vertical plane and which at its end has line sheaves whose axles are spaced apart and via which lifting lines run from a line drum in the crane's stem to a load-carrying member, and between the line sheaves at the end of the boom and the line drum are arranged intermediate sheaves whose axles are likewise spaced apart.
En ulempe hos kjente bomløftekraner er at linene om lineskivene beskriver en S-sløyfe, hvorved det også behøves ekstra lineskiver. Lineskivene i bommens ende bør være store på grunn av S-sløyfen. For lineskivene finnes det en såkalt utjevnings-konstruksjon hvori det inngår utjevningsarmer og ledd for frem-bringelse av lastbæreorganets horisontale bevegelse under bommens radiale bevegelse. En slik konstruksjon er f.eks. kjent fra finsk patentskrift 42122. I sin helhet er denne utførelse voluminøs og tung. A disadvantage of known boom lifting cranes is that the lines around the sheaves describe an S-loop, whereby additional sheaves are also needed. The line sheaves at the end of the boom should be large because of the S-loop. For the line sheaves, there is a so-called leveling construction which includes leveling arms and joints for producing the horizontal movement of the load-carrying body during the radial movement of the boom. Such a construction is e.g. known from Finnish patent document 42122. In its entirety, this design is voluminous and heavy.
Formålet med den foreliggende oppfinnelse er å avhjelpe ovennevnte ulemper og å frembringe en bomløftekran som har for-delaktigere konstruksjon og som er lettere. The purpose of the present invention is to remedy the above-mentioned disadvantages and to produce a boom lifting crane which has a more advantageous construction and which is lighter.
Bomløftekranen ifølge oppfinnelsen er kjennetegnet ved The boom lifting crane according to the invention is characterized by
at løftelinene løper i kryss mellom lineskivene i bommens ende og mellomskivene ved leddet, og at stillingene for lineskivene i bommens ende og mellomskivene ved leddet er uforanderlige i forhold til hverandre uavhengig av bommens bevegelser. Derved kan hele bomkonstruksjonen være lettere på grunn av at det i lineføringen ikke finnes noen S-sløyfer, hvorved man kan anvende mindre lineskiver. Man får også et mindre antall lineskiver. that the lifting lines run in a cross between the line sheaves at the end of the boom and the intermediate sheaves at the joint, and that the positions of the line sheaves at the end of the boom and the intermediate sheaves at the joint are unchanging in relation to each other regardless of the movements of the boom. Thereby, the entire boom construction can be lighter due to the fact that there are no S-loops in the line guide, whereby smaller line sheaves can be used. You also get a smaller number of line disks.
Ifølge en kjent løsning fantes det ved opphengning med fire liner ti lineskiver i bommens ende, mens det ifølge oppfinnelsen bare finnes åtte. Hele bomsystemet kan således være kortere og lettere. According to a known solution, when suspended with four lines, there were ten line sheaves at the end of the boom, while according to the invention there are only eight. The entire toll system can thus be shorter and lighter.
Oppfinnelsen vil bli nærmere beskrevet i det etterfølgende under henvisning til den medfølgende tegning, hvor figuren viser en utførelsesform av bomløftekranen ifølge oppfinnelsen. The invention will be described in more detail below with reference to the accompanying drawing, where the figure shows an embodiment of the boom lifting crane according to the invention.
Løftekranen omfatter en portal 1 og over denne en dreievogn 2 som er dreibar om vertikalaksen. Til dreievognen er det lagret en løftebom som er dreibar i vertikalplanet. I bommens 4 ende, ved et ledd samt i kranenes tårn er det anordnet lineskiver 5, 6, 7, 8, 9, via hvilke løfteliner 10, 11 løper fra en linetrommel 12 til et lastbæreorgan 1.3. Akslene for lineskivene 5, 6 i bommens 4 ende befinner seg i avstand fra hverandre. Likeledes befinner mellomskivenes 7, 8 aksler seg i avstand fra hverandre. Løftelinene 10, 11 løper mellom lineskivene 5, 6 i bommens ende og mellomskivene 7, 8 ved leddet i kryss, The lifting crane comprises a gantry 1 and above this a swivel carriage 2 which can be turned about the vertical axis. A lifting boom that can be turned in the vertical plane is stored for the turning trolley. At the end of the boom 4, at a joint and in the tower of the cranes, line sheaves 5, 6, 7, 8, 9 are arranged, via which lifting lines 10, 11 run from a line drum 12 to a load-carrying member 1.3. The shafts for the line discs 5, 6 at the end of the boom 4 are located at a distance from each other. Likewise, the shafts of the intermediate discs 7, 8 are located at a distance from each other. The lifting lines 10, 11 run between the line sheaves 5, 6 at the end of the boom and the intermediate sheaves 7, 8 at the joint in the cross,
og stillingene til lineskivene i bommens ende og til mellomskivene er uforanderlige i forhold til hverandre uavhengig av bommens bevegelser. and the positions of the line sheaves at the end of the boom and of the intermediate sheaves are unchanged in relation to each other regardless of the movements of the boom.
Når man med denne bomløftekran flytter en last 14 fra en ytre grensestilling til en indre grensestilling holder lastbæreorganet 13 og lasten 14 seg i det vesentlige konstant under hele bevegelsen på grunn av at løftelinene 10, 11 løper i kryss mellom lineskivene 5, 6 og mellomskivene 7, 8. When using this boom lifting crane to move a load 14 from an outer limit position to an inner limit position, the load carrier 13 and the load 14 remain essentially constant during the entire movement due to the fact that the lifting lines 10, 11 run in a cross between the line sheaves 5, 6 and the intermediate sheaves 7 , 8.
Når lineskiven 5 i bommens 4 ende ved svinging av bommen svinges fra en stilling over lineskiven 6 til en stilling neden-for denne, hever mellomskiven 8 seg opp over mellomlineskiven. 7, hvorved løftelinen 10 på lineskivene 5, 8 trekkes til og holder lastbæreorganet horisontalt og i tilnærmelsesvis konstant høyde over bakken. When the line sheave 5 at the end of the boom 4 is swung from a position above the line sheave 6 to a position below this, the intermediate sheave 8 rises above the intermediate sheave. 7, whereby the lifting line 10 on the line sheaves 5, 8 is pulled to and holds the load carrier horizontally and at an approximately constant height above the ground.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI772110A FI59074C (en) | 1977-07-05 | 1977-07-05 | BOMLYFTKRAN |
Publications (3)
Publication Number | Publication Date |
---|---|
NO782315L NO782315L (en) | 1979-01-08 |
NO149279B true NO149279B (en) | 1983-12-12 |
NO149279C NO149279C (en) | 1984-03-21 |
Family
ID=8510959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO782315A NO149279C (en) | 1977-07-05 | 1978-07-04 | BOMLOEFTEKRAN |
Country Status (5)
Country | Link |
---|---|
DK (1) | DK149468C (en) |
FI (1) | FI59074C (en) |
NO (1) | NO149279C (en) |
PL (1) | PL130934B1 (en) |
SE (1) | SE419331B (en) |
-
1977
- 1977-07-05 FI FI772110A patent/FI59074C/en not_active IP Right Cessation
-
1978
- 1978-07-04 SE SE7807545A patent/SE419331B/en not_active IP Right Cessation
- 1978-07-04 NO NO782315A patent/NO149279C/en unknown
- 1978-07-05 DK DK303478A patent/DK149468C/en not_active IP Right Cessation
- 1978-07-05 PL PL1978208192A patent/PL130934B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
PL208192A1 (en) | 1979-04-09 |
FI59074C (en) | 1981-06-10 |
FI772110A (en) | 1979-01-06 |
SE7807545L (en) | 1979-01-06 |
NO149279C (en) | 1984-03-21 |
FI59074B (en) | 1981-02-27 |
DK303478A (en) | 1979-01-06 |
PL130934B1 (en) | 1984-09-29 |
NO782315L (en) | 1979-01-08 |
DK149468B (en) | 1986-06-23 |
SE419331B (en) | 1981-07-27 |
DK149468C (en) | 1986-12-01 |
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