US3794185A - Change-over unit for hoisting appliances - Google Patents

Change-over unit for hoisting appliances Download PDF

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Publication number
US3794185A
US3794185A US00173781A US3794185DA US3794185A US 3794185 A US3794185 A US 3794185A US 00173781 A US00173781 A US 00173781A US 3794185D A US3794185D A US 3794185DA US 3794185 A US3794185 A US 3794185A
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US
United States
Prior art keywords
block
upper block
coupling
releasing
change
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.)
Expired - Lifetime
Application number
US00173781A
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English (en)
Inventor
F Kroll
B Lang
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Individual
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Individual
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Publication of US3794185A publication Critical patent/US3794185A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/043—Block and tackle system with variable number of cable parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/01—General aspects of mobile cranes, overhead travelling cranes, gantry cranes, loading bridges, cranes for building ships on slipways, cranes for foundries or cranes for public works
    • B66C2700/012—Trolleys or runways
    • B66C2700/017—Installations characterised by their destination or by the load-engaging element for as far as the trolley is essential

Definitions

  • ABSTRACT A change-over unit for hoisting appliances with a lower block suspended in a plurality of rope parts from an upper block, and with an intermediate block inserted between said blocks, the intermediate block being adapted to be arbitrarily coupled to the upper block or to the lower block to change the transmission ratio and the permissible load, the upper block (1) being provided with at least one releasable coupling member (11) which is arranged to engage at least one coupling member (15) provided on the intermediate block (8), the lower block (5) having at least one uncoupling member (16) which is designed as a releasing member for the coupling member (11) of the upper block (1), said coupling member being adapted to be arbitrarily placed in a releasing position or a neutral position.
  • the present invention relates to a change-over unit for hoisting appliances with a lower block suspended in a plurality of rope parts from an upper block, and with an intermediate block inserted between said blocks, and wherein the intermediate block can be arbitrarily coupled to the upper block or to the lower block to change the transmission ratio and the permissible load.
  • the hoisting appliance may, e.g., operate withtwo, respectively four parts of rope.
  • the invention has for its object .toprovide a unitby means of which the change-over operation canlbe executed simply and semi-automatically.
  • this object is substantially attained by providing the upper block with at least one releasable coupling member which is arranged to engage at least one coupling member provided on the intermediate block, and by providing the lower block with at least one un-coupling member which is designed as a releasing member for the coupling member of the upper block, and which can be arbitrarily placed in a releasing position or a neutral position.
  • the intermediate block If by means of the lower block the intermediate block is hoisted into contact with the upper block,and the releasing member is in its neutral position, the intermediate block will be coupled to the upper block. In this manner a change-over can be made from operation, c.g., with two parts of rope to operation with four parts of rope, as the intermediate block remains coupled to the upper block when the lower block is lowered. If it is wanted again to change over from operation with four parts to operation with two parts of rope, the releasing member placed on the lower block is moved to releasing position, which can easily be done from the ground when the lower block has been lowered.
  • the releasing member When, thereupon, the lower block is hoisted, the releasing member will release the coupling connection between the upper block and the intermediate block, and the intermediate block can now be lowered together with the lower block, which is tantamount to a resumption of operation with two parts of rope.
  • the two-parts operation continues for as long as the releasing member remains in its releasing position. Not until the releasing member is returned to its neutral position can the intermediate block be coupled to the upper block again, and a change-over to four-parts operation can take place.
  • Four-parts operation continues for as long as the releasing member is allowed to remain in its neutral position.
  • the coupling members may be designed as clutches and the releasing member as a filling member which may enter the gap of the clutch in the coupling member of the intermediate block.
  • the filling member may, according to the invention, consist of a sliding pawl which is swingably mounted on the lower block.
  • the coupling clutch of the upper block may be formed as a swingable, springloaded coupling member and the coupling clutch of the intermediate block as a stationary coupling member opposite the clutch of the upper block, whereby a simple and reliable construction is obtained.
  • the lower block and/or the upper block may be provided with at least one resiliently yielding stop member facing the upper block, respectively the lower block, which said stop member is adapted to abut against the counter block, and the stop member may be so designed and positioned as to abut against the counter block, before the coupling members of the two blocks engage one another.
  • the hoisting appliance according to the invention may be provided with an overload coupling, which is adapted to come into operation after the coupling together of the coupling members. Consequently, a special switch disconnecting the hoisting appliance after the coupling of the intermediate block to the upper block will be superfluous.
  • FIG. 1 showing the unit arranged for operation with two parts of rope
  • FIG. 2 the unit prepared for changing over to operation with four parts of rope
  • FIG. 3 the unit immediately before changing over to operation with four parts of rope
  • FIG. 4 the unit arranged for operation with four parts of rope
  • FIG. 5 the unit prepared for changing over to operation with two parts of rope
  • FIG. 6 shows a further embodiment of the unit.
  • the drawing shows a travelling trolley 1, which by means of travelling rollers 2 is movably suspended from a travel-rail 3.
  • the trolley is provided with two rope pulleys 4 and constitutes the upper block in a hoisting appliance.
  • a lower block 5 provided with rope pulleys 6 and a crane hook 7 is suspended from said lower block.
  • the hoisting appliance furthermore comprises an intermediate block 8 with a rope pulley 9.
  • the rope 10 of the hoisting appliance has been passed over the rope pulleys 4 and 9 and under the rope pulleys 6.
  • the travelling trolley or upperblock 1 has two coupling clutches 11, the coupling gaps of which facing one another. Both clutches are swingable about separate axes l2 and are urged in direction towards each other, each by its own compression spring 13, their movement of swinging in said direction being restricted by stop members 14.
  • the intermediate block 8 is provided with similarly designed and positioned counter clutches 15, which are in fixed connection with the block and whose gaps face away from one another.
  • the lower block 5 is provided with swingably mounted sliding pawls 16 which are designed and positioned in such a way that they may be swung into and at least partially fill out the gaps in the clutches 15 of the intermediate block 8, when the intermediate block 8 is coupled to the lower block 5.
  • the lower block 5 is provided with resiliently yielding stop members 17 in the form of caoutchouc buffers, which extend freely some way up from the side of the lower block 5 facing the upper block 1 and are located on opposite sides of the intermediate block 8. As shown in FIG. 6, the resiliently yielding stop member 17 may also be attached to the upper block 1 and face the lower block 5.
  • the change-over unit described heretofore operates as follows:
  • the unit is arranged for operation with two parts of rope, the sliding pawls 16, having been turned inwardly, preventing the clutches 11 of the upper block 1 from engaging the clutches 15 of the intermediate block 8, in case of lower block 5 is hoisted all the way up together with the intermediate block 8.
  • the sliding pawls 16 are swung out into neutral position as shown in FIG. 2, which can be easily done from the ground, when the lower block 5 has been hauled down. This means that the clutches 15 of the intermediate block 8 have now been opened for engaging the clutches ll of the upper block 1.
  • the hoisting appliance is provided with an overload coupling 18, shown in FIG. 1, which now starts functioning, i.e., after the clutches 11 and 15 have engaged one another.
  • a change-over unit for hoisting appliances comprising:
  • an upper block having at least one releasable coupling member and a plurality of rope parts
  • a lower block for connection to a load to be hoisted, the lower block being suspended from and hoisted toward the upper block by the rope parts and including means for releasing the coupling member of the upper block, said means including at least one releasing member having a neutral position and a releasing position;
  • an intermediate block inserted between the upper and lower blocks and supported by the lower block, the intermediate block having at least one coupling member arranged to engage the releasable coupling member on the upper block when the lower and intermediate blocks are hoisted toward the upper block, the intermediate block (1) being coupled to the upper block, when said releasing member is in the neutral position, to suspend the intermediate block from the upper block and (2) being supported by the lower block when said releasing member is in the releasing position, the intermediate block further including means for increasing the number of rope parts when the intermediate block is suspended from the upper block to change the transmission ratio and the permissible load of the hoisting appliance when the coupling members are engaged and the intermediate block is suspended from the upper block; and
  • At least one resiliently yielding stop member supported by the lower block in facing relation to the upper block, the stop member abutting against the upper block before the coupling members of the intermediate and upper blocks engage one another to compress said stop member, said compressed stop member securing the lower block with respect to the upper block and, upon engagement of the coupling members, exerting a thrust tending to secure such engagement.
  • a change-over unit characterized in that the hoisting appliance is provided with an overload coupling, which is adapted to come into operation after the coupling together of the coupling members.
  • a change-over unit according to claim 1, wherein the stop member has areas for abutment with the upper block that are positioned in straddling relation with the intermediate block.
  • a change-over unit for hoisting appliances comprising:
  • an upper block having at least onereleasable coupling member and a plurality of rope parts
  • the lower block being suspended from and hoisted toward the upper block by the rope parts and including means for releasing the coupling member of the upper block, said means including at least one releasing member having a neutral position and a releasing position;
  • the intermediate block further including means for increasing the number of rope parts when the intermediate block is suspended from the upper block to change the transmission ratio and the permissible load of the hoisting appliance when the coupling members are engaged and the intermediate block is suspended from the upper block;
  • At least one resiliently yielding stop member supported by the upper block in facing relation ,to the lower block, the stop member abutting against the lower block before the coupling members of the intermediate and upper blocks engage one another to compress said stop member, said compressed stop member securing the lower block with respect to the upper block and, upon engagement of the coupling members, exerting a thrust tending to secure such engagement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Combined Means For Separation Of Solids (AREA)
US00173781A 1971-04-05 1971-08-23 Change-over unit for hoisting appliances Expired - Lifetime US3794185A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712116544 DE2116544A1 (de) 1971-04-05 1971-04-05 Umschervorrichtung für Windwerke mit einer mehrsträngig aufgehängten Unterflasche

Publications (1)

Publication Number Publication Date
US3794185A true US3794185A (en) 1974-02-26

Family

ID=5803888

Family Applications (1)

Application Number Title Priority Date Filing Date
US00173781A Expired - Lifetime US3794185A (en) 1971-04-05 1971-08-23 Change-over unit for hoisting appliances

Country Status (10)

Country Link
US (1) US3794185A (sv)
AT (1) AT316058B (sv)
BE (1) BE771494A (sv)
CA (1) CA986886A (sv)
CH (1) CH524535A (sv)
DE (1) DE2116544A1 (sv)
DK (1) DK125235B (sv)
FI (1) FI50095C (sv)
FR (1) FR2131924B3 (sv)
SE (1) SE370059B (sv)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721286A (en) * 1985-07-24 1988-01-26 Amca International Corporation Split block for extended travel
US5165556A (en) * 1990-06-29 1992-11-24 Kone Oy Apparatus for the damping of the swing of a loading device
US5400910A (en) * 1992-12-31 1995-03-28 Harnischfeger Corporation Stabilizing mechanism for overhead crane hoist
US5518477A (en) * 1994-02-04 1996-05-21 Lumex, Inc. Multi-station exercise machine with a common weight stack and cable tension isolation
US5538223A (en) * 1994-04-21 1996-07-23 Scace; Gregory Single line multiple purchase block and tackle system
US20030127410A1 (en) * 2001-11-30 2003-07-10 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US20060169663A1 (en) * 2004-06-28 2006-08-03 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US20070090658A1 (en) * 2005-10-25 2007-04-26 Uwe Frommelt Hook-type bottom block
US20090267039A1 (en) * 2005-09-06 2009-10-29 Terex-Demag Gmbh & Co. Kg Combination double bottom block
JP2021046324A (ja) * 2019-09-11 2021-03-25 株式会社タダノ クレーンのワイヤ掛数切換装置
US20210188599A1 (en) * 2019-11-29 2021-06-24 Manitowoc Crane Group France Lifting crane with a system for automated determination of the reeving
EP4046956A1 (de) * 2021-02-17 2022-08-24 Wilbert TowerCranes GmbH Umschervorrichtung, verwendung eines horizontalantriebs beim umscheren eines krans, verfahren zum umscheren eines krans, kran sowie computerprogramm und computerlesbares medium

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2368431A1 (fr) * 1976-10-22 1978-05-19 Potain Sa Double mouflage automatique pour le chariot distributeur d'une grue a tour
DE2845874C2 (de) * 1978-10-21 1982-03-25 Elba Maschinenfabrik Kaiser GmbH & Co, 6670 St Ingbert Vorrichtung zum Umscheren des Hubseiles bei Kränen
DE3149690A1 (de) * 1981-12-15 1983-06-23 Liebherr-Werk Biberach Gmbh, 7950 Biberach Vorrichtung zum umscheren des hubseils bei kranen
AT412870B (de) * 2001-02-20 2005-08-25 Va Tech Hydro Gmbh & Co Vorrichtung und verfahren zum heben einer sich in abhängigkeit vom hubweg ändernden last
FR3096977B1 (fr) * 2019-06-05 2021-07-02 Flying Whales Procédé et dispositif de levage à partir d’un treuil
FR3114090B1 (fr) 2020-09-16 2022-08-19 Manitowoc Crane Group France Dispositif de levage à double mouflage avec mécanisme de verrouillage à loquet
FR3114089B1 (fr) 2020-09-17 2022-08-19 Manitowoc Crane Group France Dispositif de levage à double mouflage avec mécanisme de verrouillage rotatif
FR3135259B1 (fr) 2022-05-04 2024-05-03 Manitowoc Crane Group France Dispositif de levage à double mouflage avec mécanisme amélioré de verrouillage à loquet
FR3139561A1 (fr) 2022-09-14 2024-03-15 Manitowoc Crane Group France Engin de levage avec changement de mouflage automatisé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU171531A1 (ru) * Центральное конструкторское бюро Главного управлени механизации Грузовой полиспаст переменной кратности
AT56734B (de) * 1911-03-22 1912-12-10 Bleichert & Co Adolf Einrichtung zum Heben und Senken der Last bei elektrischen Hängebahnen.
DE1201189B (de) * 1958-04-26 1965-09-16 Maschf Augsburg Nuernberg Ag Befestigung eines hydraulischen Teleskop-Schwingungsdaempfers an den gegeneinander gefederten Teilen eines Kraftfahrzeuges
US3306469A (en) * 1965-06-22 1967-02-28 Richier Sa Load hoisting tackle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU171531A1 (ru) * Центральное конструкторское бюро Главного управлени механизации Грузовой полиспаст переменной кратности
AT56734B (de) * 1911-03-22 1912-12-10 Bleichert & Co Adolf Einrichtung zum Heben und Senken der Last bei elektrischen Hängebahnen.
DE1201189B (de) * 1958-04-26 1965-09-16 Maschf Augsburg Nuernberg Ag Befestigung eines hydraulischen Teleskop-Schwingungsdaempfers an den gegeneinander gefederten Teilen eines Kraftfahrzeuges
US3306469A (en) * 1965-06-22 1967-02-28 Richier Sa Load hoisting tackle

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4721286A (en) * 1985-07-24 1988-01-26 Amca International Corporation Split block for extended travel
US5165556A (en) * 1990-06-29 1992-11-24 Kone Oy Apparatus for the damping of the swing of a loading device
US5400910A (en) * 1992-12-31 1995-03-28 Harnischfeger Corporation Stabilizing mechanism for overhead crane hoist
US5518477A (en) * 1994-02-04 1996-05-21 Lumex, Inc. Multi-station exercise machine with a common weight stack and cable tension isolation
US5538223A (en) * 1994-04-21 1996-07-23 Scace; Gregory Single line multiple purchase block and tackle system
US20030127410A1 (en) * 2001-11-30 2003-07-10 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US7611023B2 (en) * 2001-11-30 2009-11-03 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US7328812B2 (en) * 2004-06-28 2008-02-12 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US20060169663A1 (en) * 2004-06-28 2006-08-03 Murata Kikai Kabushiki Kaisha Overhead travelling carriage
US20090267039A1 (en) * 2005-09-06 2009-10-29 Terex-Demag Gmbh & Co. Kg Combination double bottom block
US7722013B2 (en) * 2005-09-06 2010-05-25 Terex Demag Gmbh Combination double bottom block
US20070090658A1 (en) * 2005-10-25 2007-04-26 Uwe Frommelt Hook-type bottom block
US7469882B2 (en) * 2005-10-25 2008-12-30 Liebherr-Werk Ehingen Gmbh Hook-type bottom block
JP2021046324A (ja) * 2019-09-11 2021-03-25 株式会社タダノ クレーンのワイヤ掛数切換装置
US20210188599A1 (en) * 2019-11-29 2021-06-24 Manitowoc Crane Group France Lifting crane with a system for automated determination of the reeving
US11753284B2 (en) * 2019-11-29 2023-09-12 Manitowoc Crane Group France Lifting crane with a system for automated determination of the reeving
EP4046956A1 (de) * 2021-02-17 2022-08-24 Wilbert TowerCranes GmbH Umschervorrichtung, verwendung eines horizontalantriebs beim umscheren eines krans, verfahren zum umscheren eines krans, kran sowie computerprogramm und computerlesbares medium

Also Published As

Publication number Publication date
CA986886A (en) 1976-04-06
FR2131924B3 (sv) 1974-05-10
FI50095B (sv) 1975-09-01
CH524535A (de) 1972-06-30
FI50095C (sv) 1975-12-10
DE2116544A1 (de) 1972-11-23
SE370059B (sv) 1974-09-30
FR2131924A1 (sv) 1972-11-17
DK125235B (da) 1973-01-22
AT316058B (de) 1974-06-25
BE771494A (fr) 1971-09-30

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