EP3738918A1 - Flèche à contrepoids mobile - Google Patents

Flèche à contrepoids mobile Download PDF

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Publication number
EP3738918A1
EP3738918A1 EP19174455.6A EP19174455A EP3738918A1 EP 3738918 A1 EP3738918 A1 EP 3738918A1 EP 19174455 A EP19174455 A EP 19174455A EP 3738918 A1 EP3738918 A1 EP 3738918A1
Authority
EP
European Patent Office
Prior art keywords
boom
counterweight
elongated frame
frame arrangement
arrangement
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Withdrawn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
EP19174455.6A
Other languages
German (de)
English (en)
Inventor
Michael STRANDBERG
Kenneth Lundberg
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.)
S&L Access Systems AB
Original Assignee
S&L Access Systems AB
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 S&L Access Systems AB filed Critical S&L Access Systems AB
Priority to EP19174455.6A priority Critical patent/EP3738918A1/fr
Publication of EP3738918A1 publication Critical patent/EP3738918A1/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Withdrawn legal-status Critical Current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
    • B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
    • 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
    • B66C23/72—Counterweights or supports for balancing lifting couples

Definitions

  • the present invention relates to a boom for a flat-top crane and a flat-top crane.
  • Cranes are used in many different fields, mainly when building or repairing structures. Cranes are commonly employed in the transport industry for the loading and unloading of freight, in the construction industry for the movement of materials, and in the manufacturing industry for the assembling of heavy equipment.
  • the crane must be able to lift the weight of the load; second, the crane must not topple; third, the crane must not rupture.
  • the disclosure provides a boom for a flat-top crane, the boom comprising an elongated frame arrangement and a counterweight.
  • the counterweight is movably attached to the elongated frame arrangement such that it can move along at least 50 % of the length of the elongated frame arrangement.
  • the counterweight is thus moveable past where the boom is attached to a tower.
  • the counterweight is thus more flexible in where it can be arranged.
  • the boom comprises two hoisting arrangements for hoisting loads, the hoisting arrangements being arranged at a respective end of the boom and both hoisting arrangements being independently connected to the counterweight.
  • the counterweight can thus be used as counterweights for hoisting arrangements on both sides of the tower holding the boom.
  • the hoisting arrangements are hoist rope, wire ropes or chains.
  • the counterweight is movably attached with a sled comprising at least two wheels and the elongated frame arrangement comprises a wheel-track for guiding the wheels of the sled along the length of the elongated frame arrangement.
  • the counterweight is movably attached with at least one pinion arranged on the sled and a corresponding rack on the elongated frame arrangement.
  • the counterweight is movably attached with wheels attached to the counterweight and the elongated frame arrangement comprises a wheel-track for guiding the wheels along the length of the elongated frame arrangement.
  • the counterweight is movably attached with at least one pinion arranged on the counterweight and a corresponding rack on the elongated frame arrangement.
  • the elongated frame arrangement comprises two separable parts for simplifying transportation.
  • the elongated frame arrangement is a lattice arrangement.
  • the counterweight is arranged on any one of: a top side of the elongated frame arrangement, inside the elongated frame arrangement and on the sides of the elongated frame arrangement. If the counter weight is attached to the underside of the boom, it cannot pass the tower when the boom is attached to a tower. If the tower is attached to the boom on a side of the boom, the counterweight may also be attached to the underside of the boom.
  • the counterweight is movably attached to the elongated frame arrangement such that it can move along at least 70 %, and preferably 80 % of the length of the elongated frame arrangement. How long the counterweight should be moveably attached may vary depending on how heavy loads the crane is to lift.
  • the disclosure provides a flat-top crane comprising a boom according to any of the above features, a tower attachment arrangement for attaching the boom to a tower.
  • the tower attachment arrangement being arranged such that the boom protrudes on both sides of the attachment arrangement.
  • the counterweight of the boom is movably attached to the boom such that it can pass the tower attachment arrangement and be moved between the protrusions of the boom.
  • the general idea of the disclosure is to provide a boom and a flat-top crane where the counterweight is moveable across the boom attachment of the tower to the crane.
  • the boom and flat-top crane may also be provided with double lifting points connected to the same movable counterweight. The same counterweight can then be moved from one side of the boom to the other to act as counterweight to hoisting arrangements 5 on both sides of the boom.
  • each side of the boom may have a separate wire rope winch for hoisting loads and separate trolleys with pulley wheels to move the load along the crane arm.
  • the two rope winches then work independently of each other and the two trolleys have separate drives to move each trolley independently along the respectively boom side.
  • the crane When arranging a flat-top crane according to above, and the boom is arranged on the tower of center, the crane has one side for heavy lifts with short reach, since the boom side is shorter and one side for lighter lifts and longer reach, since the boom side is longer.
  • Figure 1 shows an example boom 1.
  • Figure 2 shows an example boom 1 with a counterweight 4.
  • the disclosure provides a boom 1 for a flat-top crane 2, the boom 1 comprising an elongated frame arrangement 3 and a counterweight 4.
  • the counterweight 4 is movably attached to the elongated frame arrangement 3 such that it can move along at least 50 % of the length of the elongated frame arrangement 3.
  • the counterweight 4 is thus moveable past where the boom 1 is attached to a tower.
  • the counterweight 4 is thus more flexible in where it can be arranged.
  • the counterweight 4 is movably attached to the elongated frame arrangement 3 such that it can move along substantially the full length of the elongated frame arrangement 3.
  • the counterweight 4 is movably attached to the elongated frame arrangement 3 such that it can move along at least 70 %, and preferably 80 % of the length of the elongated frame arrangement 3. How long the counterweight 4 should be moveably attached may vary depending on how heavy loads the crane is to lift.
  • Flat-top cranes 2 for different uses may have different requirements for how long the counterweight 4 should be able to move to the ends of the boom 1.
  • a heavier counterweight 4 may be used instead of being able to move the counterweight 4 all the way to the ends of the boom 1.
  • the counterweight 4 is movably attached to the elongated frame arrangement 3 such that, when the boom 1 is attached to a tower, the counterweight 4 can move past the tower attachment arrangement 7, where the boom 1 is attached to the tower.
  • the counterweight 4 can thus be moved to an operative position on both sides of the tower.
  • the movable counter weight can thus pass the crane house and be placed on the opposite side of the crane house to create equilibrium between the lifted load and the counterweight
  • the movable counterweight 4 can move along the boom length and be positioned at any point along the boom 1.
  • the boom 1 comprises two hoisting arrangements 5 for hoisting loads, the hoisting arrangements 5 being arranged at a respective end of the boom 1 and both hoisting arrangements 5 being independently connected to the counterweight 4.
  • the counterweight 4 can thus be used as counterweight 4s for hoisting arrangements 5 on both sides of the tower holding the boom 1.
  • the hoisting arrangements 5 are both independently attached to the counterweight 4 and can use the counterweight 4 to obtain equilibrium when hoisting loads. It should be noted that since the hoisting arrangements 5 are arranged on opposite sides of the boom 1 and thus on opposite sides of a tower holding the boom 1, the hoisting arrangements 5 cannot be used with the same counter weight at the same time.
  • the end of the boom 1 is defined as an end part of the boom 1 and is not the end side of the boom 1.
  • the hoisting arrangements 5 may be moveable along the length of the boom 1. Examples of such arrangements for such movements are shown in the figures. The arrangements and alternatives thereof are known to a skilled person and will not be explained in detail.
  • the hoisting arrangements 5 are hoist rope, wire ropes or chains.
  • the hoisting arrangements 5 may also comprise upper and lower sheaves. Hoisting arrangements 5 and variants thereof are also known to a skilled person.
  • Figure 3 shows an example boom 1 from above with several examples of positions of the counterweight 4.
  • the counterweight 4 is arranged on any one of: a top side 3i of the elongated frame arrangement 3, inside 3ii the elongated frame arrangement 3 and on the sides 3iii of the elongated frame arrangement 3. If the counter weight is attached to the underside 3iv of the boom 1, it cannot pass the tower when the boom 1 is attached to a tower. If the tower is attached to the boom 1 on a side of the boom 1, the counterweight 4 may also be attached to the underside 3iv of the boom 1.
  • Figure 4 shows a perspective view of a boom 1 with a crane house.
  • an example arrangement for raising and lowering the hoisting arrangements 5 is shown.
  • the arrangement comprises two winches 5a, each for winching a respective hoisting arrangement.
  • the movable counter weight may run on a guiding system which can be wheels on a track, sliding bearings or a trolley.
  • the guiding system is for moving the counterweight 4 and preferably prevent the counter weight from falling out of the guiding system.
  • the drive of movable counter weight can be rack and pinion, wire and winch, wheels on a track, ball screw or rubber belt and wheels.
  • the elongated frame arrangement 3 comprises two separable parts for simplifying transportation.
  • the two boom parts may be connected in a mechanical joint between the two boom parts.
  • Figure 5 shows an example showing one part of a boom 1 with a sled 6 for the counterweight 4.
  • Figure 6 shows an example showing the other part of the boom 1.
  • Figure 7 shows the same as figure 5 from a perspective view.
  • Figure 8 shows a zoomed in view of a sled 6 with corresponding when tracks 3a on the boom 1.
  • the counterweight 4 is movably attached with a sled 6 comprising at least two wheels 6a and the elongated frame arrangement 3 comprises a wheel-track 3a for guiding the wheels of the sled 6 along the length of the elongated frame arrangement 3.
  • the example sled 6 of figure 5 and 8 shows eight wheels. It is up to a system designer to choose the number of wheels suitable for the type of sled 6 and counterweight 4 they choose.
  • the boom 1 has an example wheel-track 3a which has a ridge over the wheels.
  • the ridge is to secure the wheels to the track in the upwards direction such that the sled 6 and thus also the counterweight 4 is not able to leave the track.
  • the counterweight 4 is movably attached with at least one pinion 6b arranged on the sled 6 and a corresponding rack 3b on the elongated frame arrangement 3.
  • the sled 6 may also comprise at least two wheels.
  • the counterweight 4 is movably attached with wheels 4a attached to the counterweight 4 and the elongated frame arrangement 3 comprises a wheel-track 3a for guiding the wheels along the length of the elongated frame arrangement 3.
  • the counterweight 4 is movably attached with at least one pinion 4b arranged on the counterweight 4 and a corresponding rack 3b on the elongated frame arrangement 3.
  • the sled 6 may also comprise at least two wheels.
  • Figure 9 shows a view from behind of a boom 1 with a crane house.
  • a counterweight 4 can be arranged inside 3ii the boom 1.
  • the example boom 1 illustrated in the figures is a lattice boom 1.
  • the elongated frame arrangement 3 is a lattice arrangement.
  • the inside 3ii of the boom 1 is thus hollow and may house the counterweight 4.
  • the illustrated winches are then not arranged inside 3ii of the boom 1 because they cannot be in the way of moving the moveable counterweight 4 across the boom 1.
  • the winches, or any other suitable arrangement for hoisting the hoisting arrangements 5, may be arranged on top of the boom 1 or on a side of the boom 1 or on the underside 3iv of the boom 1.
  • Figure 10 shows an example flat-top crane 2 with a boom 1, a counterweight 4 and two hoisting arrangements 5 independently attached to the counterweight 4.
  • the disclosure provides a flat-top crane 2 comprising a boom 1 according to any of the above features, a tower attachment arrangement 7 for attaching the boom 1 to a tower.
  • the tower attachment arrangement 7 being arranged such that the boom 1 protrudes on both sides of the attachment arrangement.
  • the counterweight 4 of the boom 1 is movably attached to the boom 1 such that it can pass the tower attachment arrangement 7 and be moved between the protrusions of the boom 1.
  • Advantages and alternative features of the flat-top crane 2 are the same as discussed above in connection to the boom 1.
  • the tower attachment arrangement 7 is for example a crane house on a slewing ring, two plates with a slewing ring between or the crane arm mounted directly on the top of the tower. It can be bolted or welded.
  • the tower attachment arrangement 7 is any arrangement for fastening the boom to a tower.
  • the flat-top crane 2 comprises a tower.
  • the tower being connected to the boom 1 with the tower attachment arrangement 7.
  • a crane housing for housing an operator of the crane may also be arranged between the tower attachment arrangement 7 and the boom 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Jib Cranes (AREA)
EP19174455.6A 2019-05-14 2019-05-14 Flèche à contrepoids mobile Withdrawn EP3738918A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19174455.6A EP3738918A1 (fr) 2019-05-14 2019-05-14 Flèche à contrepoids mobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19174455.6A EP3738918A1 (fr) 2019-05-14 2019-05-14 Flèche à contrepoids mobile

Publications (1)

Publication Number Publication Date
EP3738918A1 true EP3738918A1 (fr) 2020-11-18

Family

ID=66554176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19174455.6A Withdrawn EP3738918A1 (fr) 2019-05-14 2019-05-14 Flèche à contrepoids mobile

Country Status (1)

Country Link
EP (1) EP3738918A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115893234A (zh) * 2022-12-19 2023-04-04 杭州未名信科科技有限公司 智能塔吊和智能塔吊的大臂平衡控制方法
SE545556C2 (en) * 2019-12-27 2023-10-24 Skyrex Ab A crane comprising a movable boom and a movable counterweight

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1323411A (fr) * 1962-05-29 1963-04-05 S G M E Usine Moser S A Grue à flèche mobile
US3381826A (en) * 1965-12-30 1968-05-07 Richier Sa Translating means for the counterbalancing carriages in tower cranes
US3722705A (en) * 1971-05-28 1973-03-27 C Gould Marine crane particularly designed for handling cargo containers
US4067446A (en) * 1976-02-24 1978-01-10 Ray Louis F Cable stay crane
CN202016814U (zh) * 2011-05-03 2011-10-26 中国建筑科学研究院建筑机械化研究分院 结构重心自动平衡系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1323411A (fr) * 1962-05-29 1963-04-05 S G M E Usine Moser S A Grue à flèche mobile
US3381826A (en) * 1965-12-30 1968-05-07 Richier Sa Translating means for the counterbalancing carriages in tower cranes
US3722705A (en) * 1971-05-28 1973-03-27 C Gould Marine crane particularly designed for handling cargo containers
US4067446A (en) * 1976-02-24 1978-01-10 Ray Louis F Cable stay crane
CN202016814U (zh) * 2011-05-03 2011-10-26 中国建筑科学研究院建筑机械化研究分院 结构重心自动平衡系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE545556C2 (en) * 2019-12-27 2023-10-24 Skyrex Ab A crane comprising a movable boom and a movable counterweight
CN115893234A (zh) * 2022-12-19 2023-04-04 杭州未名信科科技有限公司 智能塔吊和智能塔吊的大臂平衡控制方法

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