CN1018366B - Jib cranes with slewer - Google Patents
Jib cranes with slewerInfo
- Publication number
- CN1018366B CN1018366B CN90100783A CN90100783A CN1018366B CN 1018366 B CN1018366 B CN 1018366B CN 90100783 A CN90100783 A CN 90100783A CN 90100783 A CN90100783 A CN 90100783A CN 1018366 B CN1018366 B CN 1018366B
- Authority
- CN
- China
- Prior art keywords
- platform
- spiral arm
- turning
- push
- crane
- 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
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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
- B66C23/88—Safety gear
- B66C23/92—Snubbers or dashpots for preventing backwards swinging of jibs, e.g. in the event of cable or tackle breakage
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- 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
Abstract
This crane is of the type comprising a rotating pivot (5), a jib- holder (6) which is integral with the pivot (5), a mechanism platform (7) connected to the rear of the pivot with a mobile counterweight (8), a lifting jib (9) articulated on the pivot, and means (20, 24) for lifting the jib and for raising weights. According to the invention, there is provided a jib push-back device (16), associated with the platform (7) which is suspended on the jib-holder (6), at the rear, by means of tie rods (14), and, at the front, by means of rodding (15) which also comprises pushers (37), the front of the platform (7) being linked to the pivot (5) by shafts (13) which are mobile in vertical slots (12). When the jib (9) arrives in the lifted position, means of support (54) supported by its foot (17) interact with the pushers (37) and the assembly resists continued movement. Applications: tower cranes, mobile cranes.
Description
The present invention relates to turning crane, this class hoisting crane comprises the fixing or movable for example vertical tower seat of supporting structure spare, be installed on the parts that vertical pivot rotates, it is made of S. A., radial arm bearing frame, mechanism's platform and spiral arm, described radial arm bearing frame is bearing on the S. A., described mechanism platform is positioned at the S. A. back, its supporting in the past backward and from after the balance block that moves forward, described spiral arm is forward and be hinged on that level connects axial base portion on the S. A..The invention particularly relates to the spiral arm turning gear, and cooperate with the mechanism platform and to turn round, purpose equipped therewith is to avoid spiral arm just to drop to the rear portion of bont in raised position, especially externally under the effect of load, for example the fracture of effect of inertia, wind action or hawser is all the more so.
People have understood the dissimilar turning cranes of being furnished with the spiral arm turning gear.
The turning crane of being furnished with the spiral arm turning gear according to first kind of known type, mechanism's platform forms the single unit system of being furnished with the inclined slope frame that has a down dip backward together with S. A., control hawser by one or some one or several pulleys that circle round of process moves the mobile equilibrium piece thereon, it is configured in the front portion of described single unit system, fixed under spiral arm with predetermined hinge joint distance, so that make balance block when spiral arm promotes, do best moving.In this case, the spiral arm that is in raised position just leans against on the springing, and wherein, fixed parts links to each other with radial arm bearing frame or mechanism's platform, movable part just matches with the collision block that is configured on the spiral arm, and progressive application force is applied on the spiral arm jointly to preserve the stable equilibrium.These spring installations can be mechanical parts, and for example spring also can be hydraulic part or pneumatic members, for example jack, or motor machine.The specially for carrying out situation of described these spring installations is described by american documentation literature US4270663; In general, they produce dynamic effect to arm structure, cause the uncontrollable vibration that influences equipment operation simultaneously.
The turning crane of being furnished with the spiral arm turning gear according to second kind of known type, the hoisting crane of the type is described in German patent document DE-A-3438937, in such hoisting crane, mechanism's platform is furnished with supporting member, two curved booms are thereon hinged, they are configured in the flat-bed both sides, and balance block is equipped with in the end thereafter, and its leading section is linked the spiral arm base portion by the bar that is articulated and connected; By the integral structure component that the previous section of arm is formed, pipe link, the base portion of spiral arm and mechanism's platform form variable quadrangle.In this case, the lifting of spiral arm makes the common articulation piece rotation of two curved booms on stage support, thereby balance block is moved forward.In lifting process, apply a kind of overturning couple that successively decreases around the articulation piece of balance block on supporting member; Promote when finishing, balance block applies a kind of hold torque that increases progressively along the direction opposite with the front then through this articulation piece straight-bar, stops spiral arm to continue to do lifter motion, and spiral arm is preserved the stable equilibrium when static.Description by operating condition is found, here opposite with former case, two kinds of equilibrium functions of spiral arm turning gear combination, promptly spiral arm in lifting process equilibrium function and make the rotating equilibrium function of spiral arm when finishing promoting, therefore, this device can not make described two kinds of functions reach optimization.Here, people can notice that also it is all the more so to narrate situation about describing in roughly the same performance, the especially accompanying drawing 2 in british patent document GB-A-930021.
Purpose of the present invention is exactly the turning crane that has the above-mentioned defective that exists in the turning crane to provide a kind of spiral arm turning gear and balance block mobile device to separate earlier for overcoming, so that the raised position at spiral arm firmly keeps its balance, and can not produce uncontrollable vibration.
For this reason, turning crane of the present invention comprises: place as the S. A. on the tower seat of supporting structure spare, link to each other and sweptback radial arm bearing frame with S. A., with the continuous mechanism's platform in S. A. rear portion, be movably arranged on the balance block on mechanism's platform, balance block can be in the past backward or from after move forward, be hinged on the spiral arm of S. A. bottom, and the bont of the bont of spiral arm and load, described hoisting crane also comprises the balance block mobile device, and it makes balance block move along the mechanism's platform that slightly turns forward by one or some hawsers that link to each other with balance block with the spiral arm afterbody; It is characterized in that: rear portion, mechanism plane is anterior by a pipe link to be suspended on the radial arm bearing frame by the push and pull system in the spiral arm turning gear, also comprise the push rod that is bearing on the push and pull system in the spiral arm turning gear, remain on the radial arm bearing frame by being fixed in radial arm bearing frame fwd supporting member; Mechanism also is furnished with the platform front portion guide apparatus that is vertical configuration substantially that is used for S. A. bonded assembly horizontal shaft, and perhaps, S. A. is furnished with the guide apparatus that is vertical configuration substantially that is used for mechanism's platform bonded assembly horizontal shaft; The spiral arm afterbody is equipped with supporting member, and when spiral arm was in raised position, this supporting member matched with the free end of push rod.
The most preferred embodiment according to the present invention, the push and pull system of spiral arm turning gear is made up of one group of rigid member with two bars, form triangular isosceles trapezoid platform (positive three terrace with edges, annotate), its little base is hinged on the intermediate altitude below the radial arm bearing frame, the big base of first end similar shape rigid member in echelon of other two bars is hinged, and other ends of described two bars are hinged on two supporting members, its symmetry is fixed on mechanism's platform front part sides, so that it is linked to each other on the routine operation position, the integral structure of described push and pull system is the plane.
The supplemental characteristic according to the present invention, push rod first end of spiral arm turning gear are hinged on the continuous jointed shaft of the same push and pull system two parts of determining.
Like this, when promoting end, spiral arm just contacts with the push rod free end, it separates with the arm that is bearing on the radial arm bearing frame, apply a kind of resistance that stops it to continue motion, because push rod is in the jointed shaft back that links to each other with push and pull system two parts, under the tension force of the mechanism's platform and the balance block that suspends and main application force, move.
Reasonablely be, at least one push rod length is adjustable in two push rods, and the supporting member of spiral arm afterbody matches with the push rod free end, forms bell guide, two spiral arms on the push rod contacted simultaneously, and have safety performance.
According to other features of the present invention, the adapter shaft for mechanism's platform links to each other with S. A. forms the device that almost is the guide groove of vertical configuration with this adapter shaft, and they are made of the plurality of vertical hole.In this specialized structure, the connecting bridge between mechanism's flat-bed previous section and the S. A. is made of two groups of overcoats and tenon, and its balanced configuration is in hoisting crane turning unit both sides; The big beam end of mechanism's flat-bed forms tenon, and the recovery member on the S. A. forms overcoat.Every kind of overcoat is linked to each other by the axle with two kinds of diameters with tenon, the part that diameter is bigger constitutes the middle body of axle, be included in the flat pieces that has parallel surfaces and two kinds of width on its whole length, it is configured in the interior hole of tenon, and second diameter littler than flat pieces width is the diameter of two terminal parts of axle, it is contained in the overcoat with two parts, and the piston ring that equals the middle body diameter with diameter at least inserts together.
According to supplemental characteristic of the present invention, it is two that mortise becomes, rectangular shaped, and each mortise is equipped with two guide groove slide blocks that middle body is thicker, they vertically are configured in the inside or the both sides in above-mentioned hole, so that dispose the gap that its constant width equals the flat pieces width of adapter shaft betwixt.
When the spiral arm turning gear carried out work, this device can make mechanism's flat-bed previous section move freely in vertical direction along the hinge element with S. A..
In any case, with reference to accompanying drawing, by the embodiment of the turning crane of being furnished with the spiral arm turning gear, this embodiment is unrestricted, and the present invention is described further, and the present invention will better be understood.
Accompanying drawing is as follows:
Fig. 1 is the lateral plan of hoisting crane of the present invention, marks residing two positions of spiral arm among the figure;
Fig. 2 is the simplified side view of hoisting crane upper part, and spiral arm descends;
Fig. 3 is the simplification upward view of hoisting crane upper part (same with Fig. 2);
Fig. 4 is the view that is similar to Fig. 2, spiral arm is shown is in instantaneous raised position, and there, spiral arm contacts with the push rod of spiral arm turning gear;
Fig. 5 is with the similar view in front, spiral arm is shown is in the highest raised position, and the action of spiral arm turning gear on mechanism's platform.
Fig. 6 is the control device that moves of balance block and the transparent view of spiral arm turning gear;
Fig. 7 is the decomposition diagram of connecting bridge between mechanism's platform and the S. A.;
Fig. 8 realizes bonded assembly VIII-VIII section-drawing by visible member among Fig. 7;
Fig. 9 is with the part sectional view of determining the push rod end that the supporting member on spiral arm matches.
See figures.1.and.2 especially, hoisting crane shown in the accompanying drawing comprises the vertical tower seat 1 that is anchored at the ground, or the vertical tower seat 1 that rotates thereon, it utilizes anchor shaft to install again, by adapter shaft 3 supporting rotating components 4, this turning unit 4 is mainly by S. A. 5, radial arm bearing frame 6, mechanism's platform 7 and spiral arm 9 constitute, and 8 rotations of mobile equilibrium piece are installed on the said mechanism platform 7.
As shown in Figure 3, the radial arm bearing frame 6 with triangle horizontal section is furnished with turning unit forward, and it links to each other with S. A. and recedes.
Mechanism's platform 7 aft section are suspended on the radial arm bearing frame 6 by pipe link 14, mechanism's platform 7 previous sections are suspended on the pivot arm bearing support 6 by the push and pull system 15 with spiral arm turning gear 16, wherein, two crossbeams 10 that the framework of mechanism's platform 7 is linked on the S. A. 5 by tenon 11 constitute, the hole 12 that described tenon 11 is promptly run through by horizontal adapter shaft 13.To be described in detail below.
Make the hoisting crane upper part realize mechanization by following apparatus:
-spiral arm hoisting mechanism 20, it is installed in mechanism flat-bed rear portion, and the coiling of control hawser connects the same roller two-phase of passing through the above-mentioned hoisting mechanism of pulley 23 in top of spiral arm, and described pulley 23 is configured in the top of radial arm bearing frame 6;
-load lifting winch 24 also is contained on mechanism's platform 7, the coiling of the hawser 25 on the control roller 26, be configured in the top of radial arm bearing frame 6 through the hawser 25 of angle demodulator 27 and pulley 28, form the hawser between suspension hook 29 and the radial arm bearing frame 6, load is suspended on the described suspension hook 29, and described hawser is through the top of spiral arm 9.
The deadweight of spiral arm 9 is by balance block 8 balance in addition, and described balance block rotation is installed in mechanism's platform 7 crossbeams 10 the insides, and it is the inclination alpha that turns forward, this mechanism platform, and leading section is lower than rearward end.
As shown in Figure 6, balance block 8 is made of some continuous members 18, they by be suspended at the small sheave 30 that rotates on the crossbeam 10 mechanism's platform 7 below.At balance position, balance block 8 is kept by balanced configuration one group of two hawser 31 in mechanism's platform 7 both sides, continuous when it through being configured in the pulley 35 at mechanism's platform 7 rear portions, when being configured in the pulley 36 of rear connecting rod 14 intermediate altitudes with continuous process, they are fixed on the balance element 18 of the most close tower seat 1 by member 32, and are fixed on by member 33 on the upper frame 34 of spiral arm 9 afterbodys.
Spiral arm turning gear 16 shown in Fig. 6 is made of the push and pull system of addressing 15 and two push rods 37.
Push and pull system 15 has the triangular of formation isosceles trapezoid platform (positive three terrace with edges by one group, the rigid member 38 of two bars 39 notes) constitutes, its little base is hinged on the intermediate altitude below the radial arm bearing frame 6 by member 40, other two bars 41 are hinged by the big base of jointed shaft 42 similar shapes rigid member 38 in echelon, link to each other with supporting member 44 by the member 43 that suspends, symmetry is fixed on mechanism's platform 7 on the crossbeam 10 of leading section.Two push rod 37 first ends are hinged on the axle 42, and it connects two parts 38 and 41 of push and pull system 15.On the standard operation position, one group of push and pull system 15 and two push rod 37 that form the plane freely remains on the arm 45, this arm 45 in predetermined stationkeeping on the front surface of radial arm bearing frame 6, as shown in Figure 2.
As shown in Fig. 7 and Fig. 8, connection between mechanism's platform 7 and the S. A. 5 is realized by the joggle in the overcoat 46 by the adapter shaft 13 with two kinds of diameters, the part 47 that diameter is bigger constitutes the middle body of axle 13, be included in the flat pieces 48 that has two kinds of width of parallel surfaces on its whole length, it is configured in the hole 12 of tenon interior 11, and second diameter littler than flat pieces 48 width is the diameter of two terminal parts 49 of axle 13, it is contained in two supporting members (50 of overcoat 46,51) in, the piston ring 52 that equals middle body 47 diameters with diameter at least inserts together.12 one-tenth in tenon 11 holes are two, rectangular shaped, each mortise is equipped with two guide groove slide blocks 53 that middle body is thicker, and they vertically are configured in the inside or the both sides in above-mentioned hole 12, so that dispose the gap that its constant width " d " equals flat pieces 48 width of adapter shaft 13 betwixt.Overcoat 46 is fixed on the S. A. 5.
The crane operation situation of addressing previously is as follows:
On the position, spiral arm 9 is in low level shown in figure 2, applies a kind of maximum overturning couple in the hoisting crane front portion; In order to make this moment reach balance, balance block 8 just is in maximum going-back position on mechanism's platform 7, and remains on described position by hawser 31.In this position, push and pull system 15 is the plane, and adapter shaft 13 is in the upper position in the hole 12, and it is contained in the tenon 11 of mechanism's platform 7, and inclination alpha is a maxim.
In the lifting process of spiral arm 9, apply overturning couple by 9 pairs of hoisting crane front portions of spiral arm, gradually reduce.This minimizing is in addition complementary by moving towards balance block 8 fronts at the effect lower edge of its deadweight mechanism platform 7, and wherein, because the existence at inclination angle that is to say that component is parallel to mechanism's platform 7, therefore, tangential component makes hawser 31 keep tensioning states; Along with the aligning to spiral arm 9, the distance of separating with the attachment point 33 of pulley 36 reduces, and balance block 8 is just near vertical tower seats 1.
As shown in Figure 4, when promoting end, spiral arm 9 just contacts with push rod 37 by the supporting member 54 that is fixed on spiral arm afterbody 17.Reasonablely be, at least one push rod length is with being regulated as bolt head 55 in two push rods 37, and supporting member 54 contacts with push rod 37 free ends 56,57, and it forms bell guide 58, so that spiral arm 9 contacted simultaneously with two push rods 37 and have safety performance, as shown in Figure 9.
When spiral arm 9 continuous straightenings, the power that is applied on the push rod 37 just increases, and push and pull system 15 is moved to the back of jointed shaft 15; Simultaneously, balance block 8 continues near tower seat 1, and the axle 43 on mechanism's platform 7 be that is to say that push and pull system 15 applies a kind of increasing power, and this increases the resistance that push rod 37 is provided.
When mobile backward, the jointed shaft 42 of push rod 37 mentions the previous section of mechanism's platform 7 by push and pull system 15, and described mechanism platform 7 is just by having the guide groove 12 of directional tagging to adapter shaft 13.
As shown in Figure 5, push and pull system 15 no longer is the plane at terminal location, and adapter shaft 13 is arranged in hole 12 low insides that are contained in mechanism's platform 7 tenons 11 to be put, and inclination alpha is a minimum value.At terminal location, axle 13 does not just contact with the end face in hole 12; Like this, mechanism's platform 7 permanent maintenance on radial arm bearing frame 6 suspends.
By making moving with the distortion of push and pull system 15 of balance block 8 carry out mating reaction simultaneously, when continuously the spiral arm outside the perch 9 being aligned, push rod 37 pushes spiral arm 9 forward.When also obtain same result under wind action, spiral arm 9 is pushed to the back of hoisting crane.
Like this, make a kind of turning crane of being furnished with spiral arm turning gear 16, the mobile device of its homostasis piece 8 separately, but cooperating together with mechanism's platform 7 and balance block 8, its operation carries out, so that in raised position, spiral arm 9 firmly keeps balance, does not produce normal running or uncontrollable vibration under the situation of wind is arranged.
Obviously, the present invention is not limited to the embodiment of the turning crane of addressing previously; On the contrary, the present invention includes the remodeling and the application of other structures of doing according to principle of uniformity.Particularly do not exceed the scope of the invention and carry out following improvement:
-by being contained in S. A. rather than being contained in the some holes of mechanism's flat-bed, or by having the guide apparatus of same function, realize being connected between mechanism's platform and the S. A.;
The shape of adapter shaft between-change mechanism's platform and the S. A.;
The articulated position of-Change Example such as member 40 and 43, its can or high or low and or before or after;
-same spiral arm turning gear is used for removing the especially lifting means of automobile (wheel or crawler belt) hoisting crane of turning crane.
Claims (8)
1, the turning crane of being furnished with the spiral arm turning gear, comprise the S. A. (5) that places as on the tower seat (1) of supporting structure spare, same S. A. (5) links to each other and sweptback radial arm bearing frame (6), mechanism's platform (7) that same S. A. (5) rear portion links to each other, be movably arranged on the balance block (8) on mechanism's platform (7), this balance block (8) can be in the past backward or from after move forward, be hinged on the spiral arm (9) of the bottom (19) of S. A. (5), the bont (20) of bont of spiral arm (20) and load, described hoisting crane also comprises the mobile device of balance block (8), the hawser (31) that it links to each other with balance block (8) by one or some same spiral arms (9) afterbody makes balance block (8) move along the mechanism's platform (7) that slightly turns forward, it is characterized in that, mechanism's platform (7) rear portion is anterior by pipe link (14) to be suspended on the radial arm bearing frame (6) by the push and pull system (15) in the spiral arm turning gear (16), also comprise the push rod (37) that is bearing on the push and pull system (15) in the spiral arm turning gear (16), remain on the radial arm bearing frame (6) by being fixed in radial arm bearing frame (6) fwd supporting member (45), mechanism's platform (7) front portion also is furnished with the guide apparatus that is vertical configuration substantially (12) that is used for S. A. (5) bonded assembly horizontal shaft (13), perhaps, S. A. (5) is furnished with the guide apparatus that is vertical configuration substantially (12) that is used for mechanism's platform (7) bonded assembly horizontal shaft, spiral arm afterbody (17) is equipped with supporting member (54), when spiral arm (9) when being in raised position, supporting member (54) matches with push rod (37) free end (56,57).
2, according to the turning crane described in the claim 1, it is characterized in that, the push and pull system (15) of spiral arm turning gear (16) is made of the rigid member (38) of one group two bars (39), it forms triangular isosceles trapezoid platform, its little base (40) is hinged on the following intermediate altitude of radial arm bearing frame (6), and described one group of big base (42) that forms trapezoidal rigid member (38) is hinged with first free end (41) of other two bars, and other ends of described two bars are hinged on two supporting members (44), its symmetry is fixed on mechanism's platform (7) front part sides, and above-mentioned one group of planar linkage system (15) is linked to each other in the routine operation position.
According to the turning crane described in the claim 2, it is characterized in that 3, the push rod (37) of spiral arm turning gear (16) is hinged on first end of jointed shaft (42), two members (38,41) of its same push and pull system (15) link to each other.
4, according to described turning crane one of in the aforementioned claim 1 to 3, it is characterized in that at least one push rod length is adjustable in some push rods (37).
According to the described turning crane of aforementioned claim 1, it is characterized in that 5, the free end (56,57) of the same push rod of supporting member (54) (37) of spiral arm afterbody (17) matches, it forms bell guide (58).
6, turning crane according to claim 1, it is characterized in that, for the continuous adapter shaft (13) of the same S. A. of mechanism's platform (7) (5), end at mechanism's platform (7) forms the guide apparatus that is vertical configuration with this adapter shaft substantially, they are made of plurality of vertical hole (12), the anterior connecting bridge of same S. A. (5) mechanism's platform (7) together is made of two groups of overcoats (46) and tenon (11), its balanced configuration is in hoisting crane turning unit (4) both sides, crossbeam (10) end of mechanism's platform (7) forms tenon (11), and overcoat (46) is fixed on the S. A. (5), every group of overcoat (46) linked to each other by the axle (13) with two kinds of diameters with tenon (11), the part that diameter is bigger (47) constitutes the middle body of axle (13), be included in the flat pieces (48) of two width of some parallel surfaces on its whole length, it is configured in the hole (12) that enters tenon (11), and than closely spaced second diameter length of flat pieces (48) be the axle (13) two terminal parts (49), be contained in outer casing support spare (50,51) in, the piston ring (52) that equals middle body (4) diameter with diameter at least inserts together.
7, according to the turning crane described in the claim 6, it is characterized in that, it is two that the hole (12) of the tenon (11) of mechanism's platform (7) becomes, rectangular shaped, each mortise is equipped with two guide groove slide blocks (53) that middle body is thicker, they vertically are configured in above-mentioned hole (12) the inside and both sides, so that dispose the gap of flat pieces (48) spacing (d) that its constant width equals adapter shaft (13) therein.
8, turning crane according to claim 1, it is characterized in that, balance block (8) is made of two hawsers (31) along the device that the mechanism's platform (7) that turns forward moves, this two hawsers (31) balanced configuration is in the both sides of mechanism's platform (7), be fixed on the balance block (8) that is positioned at the most close tower seat (1) by member (32), be fixed on spiral arm (9) the afterbody upper frame (34) by member (33), they are the pulley (36) on the pulley (35) by being configured in mechanism's platform (7) rear portion and the intermediate altitude that is configured in rear connecting rod (14) continuously.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8900847 | 1989-01-18 | ||
| FR8900847A FR2641773B1 (en) | 1989-01-18 | 1989-01-18 | LIFT BOOM CRANE WITH BOOM RETURN DEVICE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1044267A CN1044267A (en) | 1990-08-01 |
| CN1018366B true CN1018366B (en) | 1992-09-23 |
Family
ID=9378047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90100783A Expired CN1018366B (en) | 1989-01-18 | 1990-01-18 | Jib cranes with slewer |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0379448B1 (en) |
| JP (1) | JPH02265898A (en) |
| CN (1) | CN1018366B (en) |
| AT (1) | ATE80358T1 (en) |
| DE (1) | DE69000289T2 (en) |
| FR (1) | FR2641773B1 (en) |
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| DE102020107417A1 (en) * | 2020-03-18 | 2021-09-23 | Liebherr-Werk Biberach Gmbh | Tower crane with adjustable counter ballast |
| RU2751926C1 (en) * | 2021-01-25 | 2021-07-20 | Александр Михайлович Рудник | Crane mobile counterweight |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE289839C (en) * | ||||
| GB930021A (en) * | 1960-03-01 | 1963-07-03 | Tornborg & Lundberg Aktiebolag | Improved jib-crane |
| FR2041657A5 (en) * | 1969-05-29 | 1971-01-29 | Richier Sa | |
| US4003474A (en) * | 1975-05-05 | 1977-01-18 | Ralph Mooney | Crane boom stop arrangement |
| SE406903B (en) * | 1977-08-10 | 1979-03-05 | Linden Alimak Ab | DEVICE FOR BALANCING A MOVING LAYER ARM AT A CRANE CONSTRUCTION |
| DE3438937C2 (en) * | 1984-10-24 | 1996-12-19 | Liebherr Werk Biberach Gmbh | Tower crane with adjustable counterweight |
| US4729486A (en) * | 1986-04-07 | 1988-03-08 | The Manitowoc Company, Inc. | Lift enhancing beam attachment with movable counterweights |
-
1989
- 1989-01-18 FR FR8900847A patent/FR2641773B1/en not_active Expired - Lifetime
-
1990
- 1990-01-08 JP JP2000743A patent/JPH02265898A/en active Pending
- 1990-01-11 DE DE9090420018T patent/DE69000289T2/en not_active Expired - Fee Related
- 1990-01-11 EP EP90420018A patent/EP0379448B1/en not_active Expired - Lifetime
- 1990-01-11 AT AT90420018T patent/ATE80358T1/en not_active IP Right Cessation
- 1990-01-18 CN CN90100783A patent/CN1018366B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0379448A1 (en) | 1990-07-25 |
| DE69000289T2 (en) | 1993-03-18 |
| CN1044267A (en) | 1990-08-01 |
| FR2641773A1 (en) | 1990-07-20 |
| JPH02265898A (en) | 1990-10-30 |
| DE69000289D1 (en) | 1992-10-15 |
| FR2641773B1 (en) | 1991-03-15 |
| EP0379448B1 (en) | 1992-09-09 |
| ATE80358T1 (en) | 1992-09-15 |
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