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EP0849212A1 - Dispositif et procédé pour arrêter des sections d'une flèche télescopique - Google Patents

Dispositif et procédé pour arrêter des sections d'une flèche télescopique Download PDF

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Publication number
EP0849212A1
EP0849212A1 EP97122425A EP97122425A EP0849212A1 EP 0849212 A1 EP0849212 A1 EP 0849212A1 EP 97122425 A EP97122425 A EP 97122425A EP 97122425 A EP97122425 A EP 97122425A EP 0849212 A1 EP0849212 A1 EP 0849212A1
Authority
EP
European Patent Office
Prior art keywords
section
set forth
crane
sliding element
telescopic jib
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Withdrawn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
EP97122425A
Other languages
German (de)
English (en)
Inventor
Gerd Ermann
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.)
Grove US LLC
Original Assignee
Kidde Industries Inc
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 Kidde Industries Inc filed Critical Kidde Industries Inc
Publication of EP0849212A1 publication Critical patent/EP0849212A1/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Withdrawn legal-status Critical Current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
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
    • 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
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs

Definitions

  • the invention relates to a device for arresting/de-arresting a telescopically extensible section of a telescopic jib (i.e., boom) and a method for arresting/de-arresting these sections.
  • Pinning serves to relieve the load on a telescoping system once a section of the telescopic jib has been telescoped to a working position. For this pinning, individual pinning points must be provided.
  • Pinning points are complicated to design, and are only provided in a limited number (e.g., two pinning points being placed for each extendable jib section) so that each telescopically extensible section has an equally limited number of working positions. It is only in these working positions that it is possible to make full use of the telescopic jib, (i.e., loading the telescopic jib to maximum permissible capacity). Between these two pinning points the individual sections cannot be pinned, and can only handle minor forces. As a result, only low loads may be lifted by the telescopic jib when a section is in an intermediate position. In addition, suitable length/position sensing instruments are required to bring the section to be pinned precisely into the position for pinning.
  • An object of the present invention is to provide a method and apparatus for arresting a section of a telescopic jib which overcomes the problems and disadvantages discussed above.
  • Another object of the present invention is to provide a device and a method for arresting a section of a telescopic jib in any position.
  • a further object of the present invention is to provide a device and a method for arresting a section of a telescopic jib in any position by actuating elements used to arrest the section.
  • a still further object of the present invention is to provide a device and a method for arresting a section of a telescopic jib in any position which does not require actuating elements to arrest the section.
  • an object of the present invention is to provide a device and a method for arresting a section of a telescopic jib which does not require position sensing instruments.
  • a crane comprising: a telescopic jib having at least a first section and a second section; a telescopic cylinder telescoping said second section along a longitudinal axis of said telescopic jib relative to said first section; and at least one sliding element connected and moveable with respect to said second section, and disposed between said first and second sections, said sliding element arresting movement of said second section with respect to said first section when in an arresting position.
  • a method of arresting movement of at least one section in a telescopic jib which includes at least a first section and a second section, and a telescopic cylinder telescoping said second section along a longitudinal axis of said telescopic jib relative to said first section, the method comprising: telescoping said second section using said telescopic cylinder to a desired working position; and arresting movement of said second section using at least one sliding element connected and moveable with respect to said second section, said sliding element being disposed between said first and second sections, and arresting movement of said second section with respect to said first section when in an arresting position.
  • Fig. 1 illustrates a cross-section of the telescopic jib according to the present invention.
  • the telescopic jib includes an outer section 1 and an inner section 2 each having a substantially rectangular shape.
  • the upper corners of the outer section 1 are rounded, while flat sides are at the lower corners of the outer section 1.
  • flat sides are at the lower corners of the inner section 2.
  • inclined guide surfaces 9 are at the upper corners of the inner section 2.
  • Auxiliary sliding elements 3' are disposed between the flat sides at the lower corners of the inner and outer sections 2 and 1, and are connected to the inner section 2. Similarly, sliding elements 3 are disposed between the rounded upper corners of the outer section 1 and the inclined guide surfaces 9 at the upper corners of the inner section 2.
  • the auxiliary sliding elements 3' and the sliding elements 3 are made of a plastic material such as polyamide.
  • a kinematic system 6 connects the sliding elements 3 to the inner section 2 such that the sliding elements 3 move with respect to the inner section 2.
  • the telescopic jib includes a telescoping cylinder 7 having extendable and retractable pins 28 for engaging holes in the inner section 2. Accordingly, when pinned to the inner section 2, the telescoping cylinder 7 can extend and retract the inner section 2 with respect to the outer section 1.
  • a telescopic cylinder 7 other known mechanisms could be used to extend and retract the inner section 2 relative to the outer section 1.
  • Fig. 2 illustrates a cross-section of the telescopic jib according to the present invention along line II-II in Fig. 1
  • Fig. 3 illustrates a cross-section of the telescopic jib along line III-III in Fig. 1.
  • Figs. 2 and 3 illustrate one of the kinematic systems 6, the sliding elements 3, and the auxiliary sliding elements 3' in greater detail.
  • the kinematic system 6 includes an angle member 22 pivotally connected to the inner section 2 at its elbow by a bracket 30.
  • a first end 24 of the angle member 22 is pivotally connected to the sliding element 3.
  • a T-shaped second end 26 of the angle member 22 is connected to the guide surface 9 by a spring storage mechanism 5.
  • the spring storage mechanism 5 exerts a force on the second end 26 away from the guide surface 9.
  • the telescopic cylinder 7 also includes piston/cylinder units 20 which respectively contact the second end 26 of the angle members 22 in each kinematic system 6 when the telescoping cylinder 7 is pinned to the inner section 2.
  • the piston/cylinder units 20 include a cylinder 8 and a piston 4, and are preferably hydraulic or pneumatic. When the piston 4 extends, the piston 4 exerts a force on the second end 26 of the angle member 22 which opposes the force applied by the spring storage mechanism 5.
  • the guide surfaces 9 are inclined with respect to the longitudinal axis of the telescopic jib.
  • the guide surfaces 9 are inclined at an angle of 2 to 30° with respect to the longitudinal axis of the telescopic jib; and, preferably, inclined at an angle of 5 to 15° with respect to longitudinal axis of the telescopic jib.
  • the thickness of the sliding elements 3 increases from a distal end of the telescopic jib to a proximal end of the telescopic jib, and matches the inclination of the guide surfaces 9.
  • Fig. 3 illustrates the sliding elements 3, the auxiliary sliding elements 3', and the kinematic systems 6 positioned at the base of the inner section 2. It should be understood that the sliding elements 3, the auxiliary sliding elements 3', and the kinematic systems 6 are not limited to being positioned at the base of the inner section 2, but could be positioned, for instance, at the head of the inner section 2.
  • the pistons 4 are retracted.
  • the spring storage mechanisms 5 exert a force on the second end 26 of the angle members 22 such that the sliding elements 3 move in a longitudinal direction towards the distal end of the telescopic jib and/or a radial direction away from the guide surfaces 9.
  • the sliding elements 3 act as brake blocks due to the resulting contact force between the sliding elements 3 and the inner surface of the outer section 1 and the guide surfaces 9, and arrest movement of the inner section 2 with respect to the outer section 1.
  • the arrangement of the sliding elements 3 and the auxiliary sliding elements 3' places tension, circumferentially, on the outer section 1 when arresting the inner section 2.
  • the telescoping cylinder 7 can then be unpinned from the inner section 2, and the same operation performed with respect to other sections (not shown) of the telescopic jib which have kinematic systems and sliding elements associated therewith.
  • the load exerts a force on the inner section 2 such that the contact force between the sliding elements 3 and the inner surface of the outer section 1 and the guide surfaces 9 increases.
  • the contact pressure increases so that stable and secure locking of the inner section 2 relative to the outer section 1 is achieved, and unwanted retraction of the inner section 2 is prevented. Consequently, arresting the inner section 2 does not require the use of spring storage mechanisms 5 exerting a force away from the guide surfaces 9 to move the sliding elements 3 into an arresting position. Instead, automatic arresting of the inner section 2 can be achieved when a load is placed on the telescopic jib.
  • the telescoping cylinder 7 is pinned to the inner section 2, and the pistons 4 are extended to counteract and overcome the force applied to the angle member 22 by the spring storage mechanisms 5.
  • the force applied by the pistons 4, causes the angle member 22 to pivot and move the sliding elements 3 away from the arresting position such that the telescoping cylinder 7 can extend or retract the inner section 2 relative to the outer section 1.
  • the number of sliding elements and auxiliary sliding elements is not limited to two, but could be greater than or less than two with an associated increase or decrease in the number of the kinematic systems 6.
  • the spring storage mechanisms 5 have been described as exerting a force on the second end 26 of the angle members 22 away from the guide surfaces 9.
  • the spring storage mechanisms 5 bias the second end 26 of the angle members 22 towards the guide surfaces 9 such that the sliding elements 3 are biased towards an unlocked position. This eliminates the need for the piston/cylinder units 20, and the inner section 2 is arrested by loading the telescopic jib as discussed above.
  • the present invention is applicable to a multi-section telescopic jib wherein kinematic systems and sliding elements are provided for each telescoping section.
  • the device and method for arresting movement of a telescopic jib makes it possible to lock or arrest a section of the telescopic jib in any position without being bound to specific working positions dictated by pinning point designs. Accordingly, pinning points are no longer needed for arresting sections of a telescopic jib, which eliminates the need for position sensing instruments, and the telescopic jib can be used to its maximum capacity in any desired working position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
EP97122425A 1996-12-20 1997-12-18 Dispositif et procédé pour arrêter des sections d'une flèche télescopique Withdrawn EP0849212A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19653502 1996-12-20
DE19653502A DE19653502C2 (de) 1996-12-20 1996-12-20 Vorrichtung zum Arretieren bzw. Lösen der Arretierung von Schüssen eines Teleskopauslegers für einen fahrbaren Kran

Publications (1)

Publication Number Publication Date
EP0849212A1 true EP0849212A1 (fr) 1998-06-24

Family

ID=7815669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97122425A Withdrawn EP0849212A1 (fr) 1996-12-20 1997-12-18 Dispositif et procédé pour arrêter des sections d'une flèche télescopique

Country Status (4)

Country Link
US (1) US6062404A (fr)
EP (1) EP0849212A1 (fr)
JP (1) JPH10218564A (fr)
DE (1) DE19653502C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790538A1 (fr) * 1999-03-02 2000-09-08 Ppm Structure de poutre en caisson creux, poutre en faisant application et fleche telescopique la mettant en oeuvre
EP2184251A1 (fr) 2008-11-07 2010-05-12 Kobelco Cranes Co., Ltd. Flèche télescopique
DE202010014105U1 (de) * 2010-10-08 2012-01-10 Liebherr-Werk Ehingen Gmbh Auslegerelement, Teleskopausleger, Verbolzsystem sowie Baufahrzeug
DE202010014103U1 (de) * 2010-10-08 2012-01-10 Liebherr-Werk Ehingen Gmbh Auslegerelement, Teleskopausleger sowie Baufahrzeug

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6601719B2 (en) 2001-09-21 2003-08-05 Link-Belt Construction Equipment Co., L.P., Lllp Locking and latching system for a telescoping boom
DE10164565C2 (de) * 2001-12-14 2003-12-11 Terex Demag Gmbh & Co Kg Teleskopausleger mit Schmiermittelzuführung
ITMO20040009A1 (it) * 2004-01-16 2004-04-16 Manitou Costr Ind Srl Braccio telescopico per carrello elevatore.
DE102005006118A1 (de) * 2005-02-10 2006-08-24 Grove U.S. Llc Selbsteinstellendes Gleitstück für Teleskopkranausleger
DE102007050632A1 (de) * 2007-10-23 2009-04-30 Rk Rose + Krieger Gmbh Verbindungs- Und Positioniersysteme Hubsäule
DE102007051539C5 (de) * 2007-10-29 2018-04-12 Liebherr-Werk Ehingen Gmbh Verfahren zum Aufrichten eines Kranauslegers
DE102007056289B4 (de) * 2007-10-29 2009-06-04 Liebherr-Werk Ehingen Gmbh Verfahren zum Aufrichten eines Kranauslegers
DE102009009944B4 (de) * 2009-02-20 2011-02-24 Terex-Demag Gmbh Sicherungs- und Verbolzungseinheit
DE202012102704U1 (de) * 2012-07-19 2013-10-21 Rk Rose + Krieger Gmbh Verbindungs- Und Positioniersysteme Linearantrieb
DE102013006259B4 (de) * 2013-04-11 2024-09-12 Liebherr-Werk Ehingen Gmbh Teleskopausleger und Kran
JP6223071B2 (ja) * 2013-08-30 2017-11-01 株式会社タダノ クレーン装置のブーム伸縮機構
US9539948B1 (en) 2016-03-22 2017-01-10 Jac Products, Inc. Telescoping step assist system and method
US10710848B2 (en) * 2017-11-17 2020-07-14 Pettibone/Traverse Lift, Llc Wearpad and wearpad housing arrangement for a telescopic boom assembly
US10723272B2 (en) 2017-12-04 2020-07-28 Jac Products, Inc. Step rail system for vehicle

Citations (7)

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Publication number Priority date Publication date Assignee Title
FR1015618A (fr) * 1950-02-14 1952-10-16 Perfectionnements aux mâts télescopiques pour grues et autres
US3398492A (en) * 1966-12-21 1968-08-27 Nat Crane Corp Extendable boom
FR2235077A1 (fr) * 1973-06-30 1975-01-24 Rastetter Adolf
FR2236771A1 (en) * 1973-07-03 1975-02-07 Rock Sa Telescopic crane jib section locking system - incorporates locking cam actuated by load application
DE2626511A1 (de) * 1976-06-12 1977-12-22 Krupp Gmbh Teleskopier-antriebseinrichtung eines teleskopauslegers
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
GB2201942A (en) * 1987-03-12 1988-09-14 Takraf Schwermasch Apparatus for interlocking telescopic members, such as a telescopic jib

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1015618A (fr) * 1950-02-14 1952-10-16 Perfectionnements aux mâts télescopiques pour grues et autres
US3398492A (en) * 1966-12-21 1968-08-27 Nat Crane Corp Extendable boom
FR2235077A1 (fr) * 1973-06-30 1975-01-24 Rastetter Adolf
FR2236771A1 (en) * 1973-07-03 1975-02-07 Rock Sa Telescopic crane jib section locking system - incorporates locking cam actuated by load application
DE2626511A1 (de) * 1976-06-12 1977-12-22 Krupp Gmbh Teleskopier-antriebseinrichtung eines teleskopauslegers
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
GB2201942A (en) * 1987-03-12 1988-09-14 Takraf Schwermasch Apparatus for interlocking telescopic members, such as a telescopic jib

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790538A1 (fr) * 1999-03-02 2000-09-08 Ppm Structure de poutre en caisson creux, poutre en faisant application et fleche telescopique la mettant en oeuvre
EP2184251A1 (fr) 2008-11-07 2010-05-12 Kobelco Cranes Co., Ltd. Flèche télescopique
DE202010014105U1 (de) * 2010-10-08 2012-01-10 Liebherr-Werk Ehingen Gmbh Auslegerelement, Teleskopausleger, Verbolzsystem sowie Baufahrzeug
DE202010014103U1 (de) * 2010-10-08 2012-01-10 Liebherr-Werk Ehingen Gmbh Auslegerelement, Teleskopausleger sowie Baufahrzeug
US20120085723A1 (en) * 2010-10-08 2012-04-12 Liebherr-Werk Ehingen Gmbh Boom element, telescopic boom and construction vehicle
CN102442616A (zh) * 2010-10-08 2012-05-09 利勃海尔-韦尔克爱茵根有限公司 吊臂元件、伸缩式吊臂以及工程车
DE102011115355B4 (de) * 2010-10-08 2015-07-02 Liebherr-Werk Ehingen Gmbh Auslegerelement, Teleskopausleger sowie Baufahrzeug
CN102442616B (zh) * 2010-10-08 2015-12-16 利勃海尔-韦尔克爱茵根有限公司 吊臂元件、伸缩式吊臂以及工程车
US10005646B2 (en) 2010-10-08 2018-06-26 Liebherr-Werk Ehingen Gmbh Boom element, telescopic boom, pinning system and construction vehicle

Also Published As

Publication number Publication date
JPH10218564A (ja) 1998-08-18
DE19653502A1 (de) 1998-06-25
DE19653502C2 (de) 2000-06-21
US6062404A (en) 2000-05-16

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