EP0943578A2 - Grue - Google Patents

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Publication number
EP0943578A2
EP0943578A2 EP99105550A EP99105550A EP0943578A2 EP 0943578 A2 EP0943578 A2 EP 0943578A2 EP 99105550 A EP99105550 A EP 99105550A EP 99105550 A EP99105550 A EP 99105550A EP 0943578 A2 EP0943578 A2 EP 0943578A2
Authority
EP
European Patent Office
Prior art keywords
boom
sheave
rope
drum
winch drum
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.)
Withdrawn
Application number
EP99105550A
Other languages
German (de)
English (en)
Other versions
EP0943578A3 (fr
Inventor
Hiroshi c/o Okubo Plant in Kobe Steel Miyazawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Publication of EP0943578A2 publication Critical patent/EP0943578A2/fr
Publication of EP0943578A3 publication Critical patent/EP0943578A3/fr
Withdrawn legal-status Critical Current

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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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/42—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
    • 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
    • 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
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains

Definitions

  • the present invention relates to a crane in which a hoisting winch drum is installed on a rotating frame of an upper rotating body.
  • a winch drum is greatly offset laterally with respect to a boom point sheave provided on the extreme end portion of the boom, and therefore, when a hoisting rope drawn out from the winch drum is directly guided to the boom point sheave, a fleet angle becomes excessively large whereby the random winding and the disengagement of the rope from the sheave often occur, and the life of the rope lowers.
  • a winch drum is inclined (for example, in the case where a winch drum is arranged on the left side of a boom, the left side of the drum is inclined to assume a position forward of the right side as viewed in plane) as viewed in plane so that the end on the boom side is positioned closer to the base end of the boom than the end on the opposite side, as disclosed in Japanese Utility Model Application Laid-Open No. 3-64986, Japanese Patent Application Laid-Open No. 7-267583, and so on.
  • a contact between a guide sheave and a rope to be a fleet angle support point is moved on a circular arc locus on the boom moving plane by the raising or lowering operation of the boom.
  • the arranging plane of the winch drum that is, the plane perpendicular to the drum shaft passing through an axial center point of the drum shaft merely crosses at one point at maximum with respect to the circular arc locus. Therefore, the fleet angle becomes large in the range deviated from the crossing point.
  • the present invention therefore provides a crane in which a fleet angle of a rope can be suppressed to be small while employing the side drum type.
  • the first invention provides a crane wherein a boom is provided to be raised and lowered about a boom foot pin on a rotating frame of an upper rotating body mounted on a lower travel body whereas a winch drum is installed sideway of the boom in the rotating frame, and a hoisting rope drawn out of the winch drum is let pass through a boom point sheave provided on an extreme end portion of the boom and hung down from the extreme end portion of the boom, characterized in that a rope guide means located between the winch drum and the boom point sheave to guide the hoisting rope is provided on the upper surface in the lowered state of the boom, and the winch drum is provided so that
  • the second invention provides a crane wherein a boom is provided to be raised and lowered about a boom foot pin on a rotating frame of an upper rotating body mounted on a lower travel body whereas a winch drum is installed sideway of the boom in the rotating frame, and a hoisting rope drawn out of the winch drum is let pass through a boom point sheave provided on an extreme end portion of the boom and hung down from the extreme end portion of the boom, characterized in that a rope guide means located between the winch drum and the boom point sheave to guide the hoisting rope is provided on the upper surface in the lowered state of the boom, and the winch drum is provided under the following conditions:
  • the "axial intermediate portion of the drum" termed herein includes not only an intermediate point in a strict sense but also a position somewhat deviated from the intermediate point in a limit not impairing the operation and effect of the second invention.
  • substantially include the two points P1 and P2 termed herein means to include not only the case of completely including but also the case of not completely including in a limit not impairing the operation and effect.
  • a horizontal guide sheave to be horizontal in a boom horizontal state is provided.
  • an auxiliary rope guide means for guiding a hoisting rope drawn out of the winch drum to the upper surface of the boom between the rope guide means and the winch is provided on a rotating frame.
  • an auxiliary rope guide sheave is provided rotatably about a sheave shaft substantially parallel to a drum shaft.
  • the auxiliary rope guide sheave is supported axially slidably on the sheave shaft .
  • the auxiliary rope guide sheave is arranged so that the contact of the hoisting rope with the sheave is superposed to a boom foot pin as viewed in side.
  • the boom moving plane is a vertical surface parallel to the boom shaft, whereas the drum arranging plane can be expressed by an angle as viewed in back ⁇ X and an angle as viewed in plane ⁇ Y.
  • the supporting point of the fleet angle is moved while forming a circular arc locus by the raising and lowering of the boom.
  • the crossing point between the locus and the above equation is a point which can make the fleet angle smallest, and the fleet angle becomes large as the fleet angle supporting point moves away from the crossing point.
  • the crossing line is a vertical line (X, 0), and the crossing point is limited to one point at maximum under this condition.
  • the winch drum is inclined not only as viewed in plane but also as viewed in back (in the second invention, the drum is inclined so that the fleet angle supporting point substantially includes two points on the circular arc locus) whereby the crossing line is a line inclined parallel to the circular arc chord, and the crossing points can be made two points at maximum.
  • the fleet angle is minimum at two points P1 and P2 on the circular arc locus formed by the rope contact in the rope guide means (guide sheave).
  • the positions of the two points P1 and P2, that is, the bilateral inclination angles of the winch drum are set so that the change of the fleet angle is made as small as possible through all the range of raising angle of the boom to thereby suppress the absolute value of the fleet angle to be small.
  • the fleet angle can be set to be minimum at these boom angles.
  • the auxiliary rope guide is interposed between the winch drum and the rope guide means whereby the hoisting rope can be wound about the winch drum in a stable manner, and drawn out of the drum.
  • the rope length ahead of the sheave does not change due to the raising or lowering of the boom.
  • the boom can be raised and lowered while the hook hung and supported on the hoisting rope is stored and secured to the extreme end of the boom.
  • reference numeral 1 designates a rotating frame of an upper rotating body mounted on a lower travel body not shown
  • reference numeral 2 designates a boom mounted on the rotating frame 1 so as to be raised and lowered about a boom foot pin 3.
  • the boom 2 is expansively constituted by a fixed boom 2a and a plurality of movable booms 2b, and a boom point sheave 4 is provided on the extreme end portion of the movable boom 2b.
  • the winch 5 including the winch drum 6 is installed on the rotating frame 1 at a position deviated rearward and on one of left and right sides (on the right side as viewed from the proximal end of the boom in the drawing, which will be explained below) with respect to the boom 2.
  • reference numeral 6a designates a winch drum shaft as a rotating center shaft of the winch drum 6, and in FIG. 1, Wo designates an axial center of the winch drum shaft 6a.
  • the winch drum 6 is in a state of being greatly deviated in position rightward and downward with respect to the boom point sheave 4, in which case, the hoisting rope 7 can not be guided to the boom point sheave 4 directly from the winch drum 6.
  • a main guide sheave 8 is mounted rotatably about a sheave shaft 8a to be vertical in a horizontal state of the boom on the upper surface at the extreme end portion of the fixed boom 2a, and an auxiliary guide sheave 9 is mounted on the rotating frame 1 above the winch drum 6 so as to cover:
  • auxiliary guide sheave 9 is mounted slidably in an axial direction with respect to a sheave shaft 9a in a state in which (b) the sheave shaft 9a is substantially parallel with the winch drum shaft 6a (completely parallel or almost parallel), and (c) a contact with the hoisting rope 7 is superposed to the boom foot pin 3 as viewed from side.
  • the auxiliary guide sheave 9 moves so as to assume a position on a straight line joining a drawing-out point with the main guide sheave 8 in response to the axial movement of the rope drawing-out point from the winch drum 6, and therefore the stable rope guiding operation is secured.
  • the length of the rope ahead (the extreme end side of the boom) from the contact of the hoisting rope 7 with the auxiliary guide sheave 9 rarely changes due to the raising or lowering of the boom, and therefore, the boom 2 can be raised and lowered while the hook is stored in and secured to the extreme end portion of the boom.
  • the winch drum 6 is installed on the rotating frame 1 in a state being inclined bilaterally with respect to the axis parallel with the boom foot pin 3 so that the end on the right side (the side opposite to the boom 2) as viewed in plane is positioned forward of the left side (on the boom 2 side) and the right side of the drum is positioned upward of the left side as viewed in back.
  • Y designates an inclination angle as viewed in plane
  • X designates an inclination angle as viewed in back.
  • a straight line (a crossing line) L in which the boom moving plane B and the winch arranging plane A intersect is inclined with respect to a vertical axis Lv.
  • the winch arranging plane A includes the two points P1, P2 and the center point Wo in an axial direction of the drum.
  • boom moving plane B is a surface parallel with a boom length axis passing through the rope contact in the main guide sheave 8.
  • the drum arranging plane A includes the case of completely including the two points P1 and P2 and the case of not completely including them in a limit which exhibits the equal operation and effect.
  • the plane A includes not only the case of passing through the center point Wo in an axial direction of the drum in a strict sense but also the case being somewhat deviated from the center point Wo.
  • the fleet angle of the rope 7 between both the main and auxiliary guide sheaves 8 and 9 is minimum at the two points P1 and P2 on the circular arc locus C formed by the rope contact by the inclinations (bilateral inclination) of the drum arranging plane A as viewed in plane and as viewed in back.
  • the absolute value of the fleet angle can be suppressed to be small through all the range of the boom raising angle by setting the positions of the two points P1 and P2, that is, the bilateral inclination angles X and Y of the drum arranging plane A so that the change of the fleet angle is as small as possible through all the range of raising angle (0° to 80°) of the boom 2.
  • ⁇ in FIGS. 5 to 7 indicates the maximum displacement in an axial direction of the rope drawing-out point in the winch drum 6 in each boom angle state.
  • the maximum fleet angle ⁇ is minimum.
  • the main guide sheave 8 is provided to be horizontal in a boom horizontal state, it is to be noted that the same sheave 8 can be provided to be vertical in a boom horizontal state (the sheave shaft 8a is horizontal).
  • the auxiliary guide sheave 9 is provided as in the above-described embodiment.
  • the present invention can be applied, for example, to the case where the winch drum 6 is installed substantially at the same height as the boom foot pin 3 whereby the rope 7 is guided directly to the main guide sheave 8 from the winch drum 6 without using the sheave 9.
  • the winch drum is inclined not only as viewed in plane but also as viewed in side (in the second invention, the winch drum is inclined so that the fleet angle crossing point substantially includes two points on the circular arc locus), whereby the crossing line is a line inclined parallel to a circular arc chord, and the crossing points can be two at maximum.
  • the drum arranging plane is inclined with respect to the boom moving plane so that the rope contact includes two points P1 and P2 on the circular arc locus formed on the boom moving plane. Therefore, the positions of the two points P1 and P2, that is, the bilateral inclination angles of the winch drum are set so that the change of the fleet angle is made as small as possible through all the range of raising angle of the boom to thereby suppress the absolute value of the fleet angle to be small.
  • the fleet angle can be set to be minimum at these boom angles.
  • the auxiliary rope guide is interposed between the winch drum and the rope guide means whereby the hoisting rope can be wound about the winch drum in a stable manner, and drawn out of the drum.
  • the rope length ahead of the sheave does not change due to the raising or lowering of the boom.
  • the boom can be raised and lowered while the hook hung and supported on the hoisting rope is stored and secured to the extreme end of the boom.
  • a fleet angle of a rope is suppressed to be small while employing a side drum type in which a winch drum is installed sideway of a boom.
  • a drum arranging plane A which is a plane perpendicular to a drum shaft 6a passing through an axial center point Wo of a winch drum shaft 6a is inclined with respect to a boom moving plane so that a rope contact of a main guide sheave 8 includes two points P1 and P2 formed on a boom moving plane B by the raising and lowering of a boom 2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP99105550A 1998-03-19 1999-03-18 Grue Withdrawn EP0943578A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP7051198 1998-03-19
JP07051198A JP3436118B2 (ja) 1998-03-19 1998-03-19 クレーン

Publications (2)

Publication Number Publication Date
EP0943578A2 true EP0943578A2 (fr) 1999-09-22
EP0943578A3 EP0943578A3 (fr) 2002-09-11

Family

ID=13433641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99105550A Withdrawn EP0943578A3 (fr) 1998-03-19 1999-03-18 Grue

Country Status (3)

Country Link
EP (1) EP0943578A3 (fr)
JP (1) JP3436118B2 (fr)
KR (1) KR100301942B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1767486A3 (fr) * 2005-09-26 2008-06-04 Liebherr-Werk Ehingen GmbH Grue automotrice
CN101007618B (zh) * 2006-01-27 2011-08-31 胡勇 摆动绞车排绳方法及装置
CN102659043A (zh) * 2012-05-11 2012-09-12 中建新疆建工（集团）有限公司 一种改进的塔式起重机扶墙杆拆卸装置
US10926982B2 (en) 2016-06-16 2021-02-23 Konecranes Global Corporation Hoisting arrangement of rope hoist

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109650269A (zh) * 2019-01-30 2019-04-19 广州市市政集团有限公司 泥浆管拆卸方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1153871B (de) * 1960-03-08 1963-09-05 Horst Walper Seilfuehrungsvorrichtung fuer an Arbeitsbuehnen vorgesehene Seilwinden
DE1204377B (de) * 1960-10-06 1965-11-04 Lebus Royalty Company Seilfuehrung mit einer Ausgleichvorrichtung
JPH07267583A (ja) * 1994-03-25 1995-10-17 Komatsu Mec Corp クレーン車

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1767486A3 (fr) * 2005-09-26 2008-06-04 Liebherr-Werk Ehingen GmbH Grue automotrice
US7506774B2 (en) 2005-09-26 2009-03-24 Liebherr-Werk Ehingen Gmbh Mobile crane
CN101007618B (zh) * 2006-01-27 2011-08-31 胡勇 摆动绞车排绳方法及装置
CN102659043A (zh) * 2012-05-11 2012-09-12 中建新疆建工（集团）有限公司 一种改进的塔式起重机扶墙杆拆卸装置
US10926982B2 (en) 2016-06-16 2021-02-23 Konecranes Global Corporation Hoisting arrangement of rope hoist

Also Published As

Publication number Publication date
KR100301942B1 (ko) 2001-09-22
KR19990077947A (ko) 1999-10-25
JP3436118B2 (ja) 2003-08-11
EP0943578A3 (fr) 2002-09-11
JPH11263591A (ja) 1999-09-28

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