US3008587A - Traveling crane for precise operation - Google Patents

Traveling crane for precise operation Download PDF

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Publication number
US3008587A
US3008587A US809486A US80948659A US3008587A US 3008587 A US3008587 A US 3008587A US 809486 A US809486 A US 809486A US 80948659 A US80948659 A US 80948659A US 3008587 A US3008587 A US 3008587A
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US
United States
Prior art keywords
hoisting assembly
traveling crane
cable
movement
guides
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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
US809486A
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English (en)
Inventor
Dachkevitch Vsevolod
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
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Commissariat a lEnergie Atomique CEA
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Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
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Publication of US3008587A publication Critical patent/US3008587A/en
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Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F7/00—Shielded cells or rooms
    • G21F7/06—Structural combination with remotely-controlled apparatus, e.g. with manipulators
    • G21F7/067—Transferring devices within cells or boxes
    • 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

  • the present invention relates to a traveling crane for precise operation in which precision is obtained automatically without intervention by the operator for adjusting the position of the mobile elements.
  • This apparatus may be employed for performing cycles of operation automatically or semiautomatically. It may also serve for handling dangerous substances, for example, radioactive substances, because the operator can control operation from a protective shelter which prevents him from seeing the apparatus in operation.
  • the traveling crane of the present invention has a hoisting assembly divided into two superposed elements, which can be connected with each other or moved relatively to each other, the upper element having a member mounted in guide tracks, both stationary and mobile.
  • the mobile tracks are connected to a movable carriage and by movement of the carriage form prolongations of the fixed tracks, the lower element having centering means with respect to the axis of lifting of the load.
  • Movement of the carriage is arrested by any suitable. means when the mobile guides form prolongations of the fixed guides. Precise positioning of the carriage is unnecessary. All that is necessary is either that the guide member of the hoisting assembly sliding along the guides be able to disengage from the mobile guides and engage in the stationary guides or the reverse. To this end relatively great play may be provided between the guides and the hoisting assembly at the opposed ends of the stationary and mobile guides.
  • the carriage being at rest, the movement of the hoisting assembly in the vertical direction can be performed.
  • the stationary or mobile guides damp its parasitic movements and adjust its trajectory.
  • the amount of freedom of the guided hoisting assembly cannot be made large enough for good centering with respect to the load. It is important that play in guidance be small so that the movement of the hoisting assembly will be stable and precise. The play should be smaller than the play between the load and its support especially for precision of placement of the support in the case of a mobile support.
  • the division of the hoisting assembly into two superposed elements has another advantage. It creates two superposed zones of manipulation communicating through small openings.
  • the lower element may be of small size to pass from the upper to the lower zone or conversely. In this way the upper zone remains free for handling of cumbersome objects.
  • the hoisting assembly is suspended on a lifting cable having a fixed end with the other end wound on a winch.
  • the cable is rove off as a tackle having n 3,fili8,587 Patented Nov. 14, 1961 pulleys mounted on the upper element of the hoisting assembly and 11 plus 1 pulleys mounted on the lower element of the hoisting assembly where n is any suitable number. Stops limit the descent of the upper element. Centering of the two elements is provided by telescoping male and female members of suitable shape, such as conical.
  • the tension of the lifting cable due to the weight of the hoisting assembly maintains the two elements in contact with each other in the absence of a deliberate relative displacement of the elements.
  • the velocity of the lower element is only a fraction equal to (l)/(n+1) of what it would be if the two elements were connected. Descent of the lower element in the lifting axis is assured by the parts of the lifting cable, which form the tackle between the two elements of the hoisting assembly and the reduction of the velocity of descent increases the stability of its trajectory.
  • control of the locking and unlocking of gripping members is provided by mechanism sliding on the lower element of the hoisting assembly and connected by a tackle, similar to the lifting tackle and disposed between this mechanism and the upper element of the hoisting assembly, with a locking cable having a fixed end with its other end wound on a winch.
  • Adjustment of the tension of this cable is obtained by two suitable devices, such as springs, counterweights or pneumatic jacks.
  • One such device which is capable of exerting a force smaller than that necessary for unlocking the gripping members is employed in the locked position and the other device unlocks and maintains the gripping members in unlocked position.
  • the tension of the locking cable is adjusted in the locked position by an auxiliary movable counterweight, whose upward movement is limited by a stop; and, in the unlocked position, by another mechanism, for example, a pneumatic jack, which blocks the counterweight against the stop and controls the unlocking of the gripping members.
  • the mechanism described above prevents relative displacement of the lower element of the hoisting assembly and of the locking arrangement of the load sliding on this element during vertical movements of the hoisting assembly.
  • the position of the lower element of the hoisting assembly therefore, determines the moment for hooking or unhooking the load.
  • the first of these arrangements may be an auxiliary movable counterweight having its upward movement limited by a stop which counterweight is displaced to absorb variations in the length of the cable.
  • the second arrangement may be a pneumatic jack which blocks the auxiliary counterweight against its stop, overcomes resistance opposing the unlocking action and regulates the tension in the cable and maintains it constant.
  • the traveling crane of the present invention may have a plurality of hooks for engaging and locking with the load.
  • Three hooks are preferred and are articulated on the lower element of the hoisting assembly and are supported on an inner flange projecting toward the interior of the load.
  • This arrangement is utilized when hollow bodies such as receptacles are to be handled.
  • the hooks or claws described above spread into engagement with the load and so do not increase the dimensions of the load enabling the load to be passed through smaller openings and placed in smaller receptacles.
  • the operation of the traveling crane of the present invention is automatic or semiautomatic when handling objects of the same or nearly the same form and dimensions which are to occupy predetermined positions.
  • the movement of translation of the carriage, the ascent and descent of the hoisting assembly, the locking and unlocking of the load can, for example, be controlled by contacts placed along the paths of movement of the carriage and of the hoisting assembly to close or open electric circuits and actuate relays energizing the driving mechamsms.
  • FIG. 1 is a schematic showing of one embodiment of a traveling crane according to the present invention
  • FIG. 2 shows, on larger scale, the hoisting assembly of the traveling crane of FIG. 1;
  • FIG. 3 is a schematic view of the guides on the line I--I of FIG. 2;
  • FIG. 4 shows the relationship of the carriage and guide tracks with the hoisting assembly positioned on the guide tracks.
  • FIG. 1 a treating shop for dangerous materials, for example, radioactive materials is shown.
  • This shop is divided into three compartments; the garage A; the colfer B; and the treating bay C, which are separated by doors D and D, respectively, operated in any suitable manner.
  • Garage A has a hatch B through which the tubs 1 are introduced into the treating bay C, these tubs being made in such a way that they can be seized by the gripping members of the traveling crane.
  • a control desk F for the traveling crane is located outside of the treating shop. It is equipped with a synoptic board for observation of the operations proceeding in the treating shop.
  • each basket 2 is brought to and taken away from the shop by a carriage 3, provided with a receiving container 4 which is disposed beneath entrance hatch 5. Hatch 5 is provided with an automatic system, not shown, which closes compartment B after basket 2 has entered it.
  • Each basket 2 is provided at its top with an outer flange 6 by which it is suspended in tubs 1 or receptable 4.
  • Each basket 2 is provided with an inner flange 7 by which it is seized by the hooks of the lifting apparatus.
  • the operations to be performed are the transfer of a basket 2 from receptacle 4 to one of tubs 1 or from one tub I to another.
  • a traveling crane having a carriage 8 mounted on rollers 9 carried in track 10. Movement is obtained by cable 11 under tension by counterweight 12, guided by various transmission pulleys 13, and tensioned by winch 14.
  • Carriage 8 suspends hoisting assembly 15 Whose movement is directed by guides 16 connected to carriage 8 and by guides 17 which are mounted to the right of the axes of tubs 1 and of batch '5.
  • Guides 16 and 17 consist of angles spaced apart to provide a groove or slideway.
  • the groove or slideway is widened at the lower part of guides 16 and at the upper part of guides 17 to facilitate transfer of hoisting assembly ,15 if the guides 16 and 17 are not perfectly aligned.
  • Stops 18 at the lower end of the guides 17 for hatch 5 limit the movement of the guide member of hoisting assembly 15.
  • swingbar 15 comprises an upper element 15-A and a lower element Iii-B.
  • upper element 15A consists of a guide traverse 19 comprising a frame extended by two lateral wings whose ends 24) engage in guide grooves 16 and 17.
  • Traverse 19 carries supports 21 and 22 for two superposed pulleys 23 and 24.
  • Lower element 15B consists of plate 25 carrying frames 26 supporting two coaxial pulleys 27, and spaced by horizontal frame 28.
  • Frame 28 is centered on traverse 19 by means of elements 29 and 39 of conical form telescoping in each other providing alignment of the two ele ments of hoisting assembly 15.
  • Hooks 31 seize basket 2. For sake of clarity in the drawing, only one book 31 is shown in FIG. 2.
  • Plate 25 carries axially a sliding arrangement for controlling hooks 31, which includes pulley support 33, mounting two identical pulleys 34 and connected by rod 36 to counterweight 35. Movement of rod 36 is limited in one direction by pulley support 33 and in the other by stop 37.
  • the end of lever arm 32 is mounted between counterweight 35 and plate 38.
  • counterweight 35 is provided with three fins 39, one only being shown, guiding the lower element 15-8 of hoisting assembly 15 relative to basket 2, when the hooks 31 are re opened. Fins 39 are placed at 120 relative to each and at 60 relative to hooks 31.
  • Hoisting assembly 15 is suspended from carriage 8 by lifting cable 48.
  • Cable 40 is fastened at its end 41 and passes in succession over transmission pulleys 42 mounted on carriage 8; then over one of the pulleys 27; then over pulley 23; then over the second pulley 27; then over the second pulley 42; then over transmission pulley 43; and then leads onto winch 44.
  • Cable 45 is fastened at one end 46 and passes in succession over one of the pulleys 47; then over one of the pulleys 34; then over pulley 24; then over the second pulley 34; then over the second pulley 47; then over transmission pulley 43; then over pulley 49, carrying auxiliary counterweight 50; then over pulley 51 carried by stationary pneumatic jack 52; and then leads onto winch 44.
  • Auxiliary counterweight th is. lighter than counterweight 35 and its upward movement is limited by stop 54 on housing 53 in which it is located. Jack 52 exerts on cable 45 a force sufficient to displace counterweights 35 and 59, locking or unlocking hooks 31.
  • Movement of carriage 8 by winch 14 is elfected when ,hois-ting assembly 15 is in its upper position with guide traverse 19 engaged in guides 16.
  • hoisting assembly 15 is stopped when basket 2 is placed in tub 1 or when hooks 31 are at the level of the inner flange of basket 2 which is indicated by the position of the upper element 15-A.
  • Suitable means located at suitable places for example, electric contacts, represented schemmatically at 55 of FIG. 2, indicate the position of basket 2 or of hooks 31, and may start or stop any operation or group of operations. Automatic operation is possible because of the precision with which movement of the various elements of the traveling crane can be obtained.
  • a traveling crane for precise operations, a carriage, a hoisting assembly, two superposed elements in said hoisting assembly, means for connecting said elements to each other and for moving said elements relative to each other, a guide for the upper element of said superposed elements, vertically disposed guide tracks for said guide, said guide tracks comprising fixed guide tracks and movable guide tracks mounted on said carriage and form ing extensions of said fixed guide tracks, said guide engaging arid running on said guide tracks, and centering means on the lower element of said superposed elements centering said lower element with respect to said upper element and to the lifting axis of the load.
  • a traveling crane as described in claim 2 including male and female members of.conical form carried by and centering the lower element and the upper element of said superposed elements.
  • a traveling crane as described in claim 2 including gripping members on said lower element and means for controlling the locking and unlocking of said gripping members mounted on said lower element, including a tackle similar to said lifting tackle and disposed between said controlling means and the 'upper element of said superposed elements and rove ofi from a locking cable having a fixed end and its other end led to said lifting winch.
  • a traveling crane as described in claim 4 including means for regulating the tension of the locking cable comprising two tensioning mechanisms, one of said mechanisms exerting a tractive force smaller than required for releasing said gripping members, for maintaining said gripping members in locked position and the other of said mechanisms exerting a tractive force sufiicient to unlock and hold said gripping members in unlocked position.
  • a traveling crane as described in claim 4 including an auxiliary mobile counterweight whose upward movement is limited by a stop regulating the tension of the locking cable in the locked position, and a pneumatic jack blocking said counterweight against said stop in unlocked position and unlocks said gripping members.
  • a traveling crane as described in claim 4 including a plurality of hooks locking the load and articulated on said lower element of said hoisting assembly and mounted for reception within the interior of the load.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Mechanical Engineering (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
US809486A 1958-05-06 1959-04-28 Traveling crane for precise operation Expired - Lifetime US3008587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR764922A FR1238236A (fr) 1958-05-06 1958-05-06 Pont roulant pour manutentions précises

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US3008587A true US3008587A (en) 1961-11-14

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US809486A Expired - Lifetime US3008587A (en) 1958-05-06 1959-04-28 Traveling crane for precise operation

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US (1) US3008587A (en(2012))
BE (1) BE578104A (en(2012))
CH (1) CH350095A (en(2012))
DE (1) DE1130978B (en(2012))
FR (1) FR1238236A (en(2012))
GB (1) GB917137A (en(2012))
LU (1) LU37145A1 (en(2012))

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2092674A1 (en) * 1970-06-05 1972-01-28 Commissariat Energie Atomique Handling fissile material - charges by transferring between working station via sealed trunking
FR2610609A1 (fr) * 1987-02-11 1988-08-12 Feralco Sa Dispositif de manutention de bacs de stockage situes en file
US4830125A (en) * 1987-07-16 1989-05-16 Kanebo Ltd. Process and apparatus for automatically weighing and introducing chemicals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570035A (en) * 1924-11-28 1926-01-19 Cleveland Crane Eng Drop track section
GB416781A (en) * 1933-02-18 1934-09-18 Express Lift Co Ltd Improvements in or relating to lifts
US2457135A (en) * 1946-11-04 1948-12-28 Southern Wood Preserving Co Grapple
US2615588A (en) * 1950-07-28 1952-10-28 Gedris Stanley James Flask turnover for foundry molding machines
US2689661A (en) * 1951-10-25 1954-09-21 Daniel F Przybylski Dipper stick and dipper operating means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR426696A (fr) * 1911-03-01 1911-07-12 Eugene Mercier Transporteur aérien
GB174256A (en) * 1920-11-18 1922-01-26 James Andrew Gorrie Method and means of transportation by aerial ropeways

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1570035A (en) * 1924-11-28 1926-01-19 Cleveland Crane Eng Drop track section
GB416781A (en) * 1933-02-18 1934-09-18 Express Lift Co Ltd Improvements in or relating to lifts
US2457135A (en) * 1946-11-04 1948-12-28 Southern Wood Preserving Co Grapple
US2615588A (en) * 1950-07-28 1952-10-28 Gedris Stanley James Flask turnover for foundry molding machines
US2689661A (en) * 1951-10-25 1954-09-21 Daniel F Przybylski Dipper stick and dipper operating means

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Publication number Publication date
LU37145A1 (en(2012))
DE1130978B (de) 1962-06-07
BE578104A (en(2012))
GB917137A (en) 1963-01-30
FR1238236A (fr) 1960-08-12
CH350095A (fr) 1960-11-15

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