EP0126303B1 - Crane undecking arrangement - Google Patents
Crane undecking arrangement Download PDFInfo
- Publication number
- EP0126303B1 EP0126303B1 EP19840104405 EP84104405A EP0126303B1 EP 0126303 B1 EP0126303 B1 EP 0126303B1 EP 19840104405 EP19840104405 EP 19840104405 EP 84104405 A EP84104405 A EP 84104405A EP 0126303 B1 EP0126303 B1 EP 0126303B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- undecking
- legs
- tubular member
- crane
- leg
- 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
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- 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
- B66C23/78—Supports, e.g. outriggers, for mobile cranes
- B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
Definitions
- the present invention relates to an undecking arrangement for cranes in accordance with the preamble of claim 1.
- US-A 3,396,854 discloses an outrigger stabilizer for cranes, having a pair of front legs and a pair of rear legs. These legs can be swung to outside positions. Each leg has a tubular member with hydraulic jack means, and each tubular member is secured to one end of a beam whereas the other end of the beam is mounted on a pivot. The transport from an inside position to an outside position is accomplished by retraction and extension of a beam. A segmental and eccentric pinion gear and a pair of spaced racks with transverse teeth are provided, in order to raise and to lower the legs when the beam is retracted or extended.
- the present invention has the object to provide an undecking arrangement for a crane having a retractable leg structure which is capable of compact stowage.
- the invention provides a structural arrangement for the undecking of a crane upper which requires relatively short stroke jacks and the inherent disadvantages of long stroke jacks are thereby obviated.
- the legs may be folded compactly and with little physical effort against the crane upper into their stowed positions and do not inhibit or interfere with the normal operation of the crane.
- a crane indicated generally at 10, includes an upper 12 rotatably mounted on a lower works or carrier 14 by meas of a turntable bearing 16.
- the turntable bearing 16 is releasably secured to a ring 18 attached to the upper 12.
- a preferred means for releasably securing the ring and turntable bearing is disclosed in U.S. Patent 3,923,407 issued Dec. 2,1975 to L. B. Jensen and R. E. Thune.
- a pair of front legs 20 are mounted on the front of the upper 12 and a pair of rear legs 22 are mounted on the rear thereof.
- Each of the pair of legs 20 and 22 is capable of spanning the transverse width of the carrier 14 and provide a structural means of supporting the upper 12 from the ground. Since each of the front pair of legs are similar, as are each of the rear pair, a description of only one leg of each pair is necessary for a complete under- ⁇ standing of the invention.
- the front leg 20 includes a tubular portion 24 having a double-acting hydraulic ram or jack 26 affixed to the interior thereof.
- the rod 28 of jack 26 protrudes from one end of portion 24, has a cross bore 30 for attachment of a float or pontoon 32, as shown in Figures 1 and 2, for engagement with the ground, and is extendable to elevate the upper 12 as can be seen in Figure 2.
- a transverse beam end 34 is affixed to the other end of portion 24 with a gusset 36 welded there between.
- the beam end 34 is pivotally mounted to a plate 38 secured to the free end of a round tubular beam 40 by means of hinge pin 42.
- the hinge pin 42 is oriented substantially vertical so that the leg 20 may swing in a horizontal plane between a stowed position, as shown by solid lines in Figure 3, and a deployed or outward position, as shown by phantom lines.
- the beam end 34 is provided with a bore 44 that is alignable with a bore 46 provided in the plate 38. Insertion of a pin through the bores 44 and 46 rigidly secures the beam end 34 to the beam 40.
- the arrow 48 illustrates the movement of bore 44 as the leg 20 is manually pivoted between the solid line stowed position and the phantom line deployed position. In the stowed position the leg 20 is underneath the cab 50 of the upper, as shown in Figure 1, with the tubular portion 24 extending forward, thereof, relative to the upper 12.
- the leg 20 In the deployed position, the leg 20 is positioned outboard and beside the cab 50 with the portion 24 extending rearward. While the leg 20 is heavy, the manual movement between stowed and deployed positions may be readily accomplished because only the frictional forces around hinge pin 42 need be overcome.
- the leg 20 must be rotated through 90 degrees to a vertical orientation.
- Such movement is provided by mounting the round beam 40 in a round box member 51 rigidly secured to the frame of the upper 12 through plate members 52 and 54.
- An actuating tube 56 is secured to, and extends between, the beam 40 and the comparable beam for the other of the pair of legs 20.
- a crank arm 58 is secured to the center of the tube 56 and is pinned at 60 to the clevis on the rod end of a double-acting hydraulic ram 62.
- the head end of ram 62 is pinned at 64 to a fixed bracket 66 rigidly secured to the upper 12.
- the leg 20 With the ram 62 extended, as shown in Figure 4, the leg 20 will be in its deployed position; the center line of the leg 20 being indicated at 70.
- the ram 62 When the ram 62 is contracted, as shown in phantom lines therein, the leg 20 will be rotated to its vertical position; the centerline of the leg 20 now being indicated at 72.
- a collar 74 engages the inner end of the round beam 40 and is arranged to function as a stop or motion limiter.
- the collar 74, round beam 40 and the actuating tube 56, are pinned into a unitary structure by a pin 76 inserted through aligned holes extending there through.
- a lug 78 formed on the collar 74 is provided with a pair of radially extending stop surfaces or faces 80 and 82.
- a wedge block 84 having a surface engageable with, and complementary to, the face 80 is secured to a structural member 86 of the upper 12.
- the wedge block 84 is pushed against the face 80 and welded to the member 86 when the legs 20 are vertically oriented with the upper 12 in a level position.
- the engagement of the face 80 with the wedge 84 thereafter positions the legs 20 correctly to support the weight of the upper.
- shims may be attached to the wedge block to compensate for tolerance accumulations between the two front legs.
- a pawl 88 is pivotally mounted by means of pin 90 to a plate member 92 affixed between plate member 54 and its corresponding member on the other side of the upper's longitudinal center line.
- the pawl 88 is biased by tension spring 94 toward engagement with the stop surface or face 82.
- Shims 96 may be secured to the free end of pawl 88, in order to reduce back lash and to lock the cross tube members so that the legs 20 are substantially vertical.
- the pawl 88 is manually lifted by means of handle 98 so that it is free of the lug 78 and the ram 62 is extended, causing the legs 20 to rotate to their deployed position.
- the collar 74 and its lug 78 will have rotated until the face 82 engages the angle 100 secured between the plate 54 and its corresponding member on the other side of the upper center line.
- the pin that had been inserted through bores 44 and 46 is removed and the leg 20 pivoted on pin 42 from its deployed position to its stowed position.
- the center of gravity of the leg 20 tends to rotate the beam 40 in a counter clockwise direction, as viewed in Figure 4.
- the rear legs 22 for supporting the upper 12 are pivotable between an upward and inboard stowed position, shown by phantom lines in Figure 1, and an outward and downward operable position, shown by solid lines in Figures 1 and 2.
- the one leg 22, shown in Figure 6, illustrates the leg in its stowed position in solid lines and in its operable position in phantom lines with the lower portion eliminated.
- the rear leg 22 has a tubular member 102 with a double-acting jack 104 affixed to its interior.
- the rod of the jack has a cross bore 106 for attachment of a float or pontoon 32 when in its operable position.
- the tubular member 102 is attached to a beam end 108 with a gusset 110 secured there between for strength.
- the beam end 108 is preferably hollow and of rectangular cross section, and is pivotally connected by means of pin 112 to a rigid beam 114 affixed to the upper 12.
- a bellcrank 116 is rotatably mounted on the pin 112.
- a double acting hydraulic ram 118 has its rod end pivotally connected at 117 to the bell crank 116 and its head end pivotally connected at 119 to the beam end 108.
- a similar ram 120 has its rod end pivotally connected at 121 to the bell crank 116 on the opposite side of the pin 112 and its head end pivotally connected at 122 to the beam 114.
- the beam end 108 is substantially parallel with and overlies the beam 114.
- the beam end 108 and beam 114 are contracted, the beam end 108 is rotated counter clockwise, as viewed in Figure 6, through approximately 180 degrees so that the beam end 108 and the beam 114 are aligned with the tubular member 102 substantially vertical.
- the beam end 108 and beam 114 are then joined into a structural unit by insertion of a pin through then aligned bores 124 and 126 formed in the beam end 108 and the beam 114 respectively.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Description
- The present invention relates to an undecking arrangement for cranes in accordance with the preamble of claim 1.
- US-A 3,396,854 discloses an outrigger stabilizer for cranes, having a pair of front legs and a pair of rear legs. These legs can be swung to outside positions. Each leg has a tubular member with hydraulic jack means, and each tubular member is secured to one end of a beam whereas the other end of the beam is mounted on a pivot. The transport from an inside position to an outside position is accomplished by retraction and extension of a beam. A segmental and eccentric pinion gear and a pair of spaced racks with transverse teeth are provided, in order to raise and to lower the legs when the beam is retracted or extended.
- The present invention has the object to provide an undecking arrangement for a crane having a retractable leg structure which is capable of compact stowage.
- In accordance with the invention, this object is solved by the undecking arrangement as defined in claim 1. Preferred embodiments of the invention are defined in the subclaims.
- The invention 'provides a structural arrangement for the undecking of a crane upper which requires relatively short stroke jacks and the inherent disadvantages of long stroke jacks are thereby obviated. The legs may be folded compactly and with little physical effort against the crane upper into their stowed positions and do not inhibit or interfere with the normal operation of the crane.
- Other attributes and advantages of the present invention will become more readily apparent from a perusal of the following description and of the accompanying drawings wherein:
- Figure 1 is a side elevational view of a crane incorporating an undecking arrangement according to the present invention;
- Figure 2 is a side elevational view of the crane in Figure 1 showing the upper undecked from the carrier;
- Figure 3 is a view taken on line 3-3 of Figure 1;
- Figure 4 is a cross-sectioned view taken on line 4-4 of Figure 3;
- Figure 5 is a cross-sectioned view taken on line 5-5 of Figure 3; and
- Figure 6 is a view taken on line 6-6 of Figure 1.
- Referring to Figures 1 and 2, a crane, indicated generally at 10, includes an upper 12 rotatably mounted on a lower works or carrier 14 by meas of a turntable bearing 16. The turntable bearing 16 is releasably secured to a
ring 18 attached to the upper 12. A preferred means for releasably securing the ring and turntable bearing is disclosed in U.S. Patent 3,923,407 issued Dec. 2,1975 to L. B. Jensen and R. E. Thune. A pair offront legs 20 are mounted on the front of the upper 12 and a pair ofrear legs 22 are mounted on the rear thereof. Each of the pair oflegs - The
front leg 20 includes atubular portion 24 having a double-acting hydraulic ram orjack 26 affixed to the interior thereof. Therod 28 ofjack 26 protrudes from one end ofportion 24, has across bore 30 for attachment of a float orpontoon 32, as shown in Figures 1 and 2, for engagement with the ground, and is extendable to elevate the upper 12 as can be seen in Figure 2. Atransverse beam end 34 is affixed to the other end ofportion 24 with agusset 36 welded there between. Thebeam end 34 is pivotally mounted to aplate 38 secured to the free end of a roundtubular beam 40 by means ofhinge pin 42. Thehinge pin 42 is oriented substantially vertical so that theleg 20 may swing in a horizontal plane between a stowed position, as shown by solid lines in Figure 3, and a deployed or outward position, as shown by phantom lines. Thebeam end 34 is provided with abore 44 that is alignable with abore 46 provided in theplate 38. Insertion of a pin through thebores beam end 34 to thebeam 40. Thearrow 48 illustrates the movement ofbore 44 as theleg 20 is manually pivoted between the solid line stowed position and the phantom line deployed position. In the stowed position theleg 20 is underneath thecab 50 of the upper, as shown in Figure 1, with thetubular portion 24 extending forward, thereof, relative to the upper 12. In the deployed position, theleg 20 is positioned outboard and beside thecab 50 with theportion 24 extending rearward. While theleg 20 is heavy, the manual movement between stowed and deployed positions may be readily accomplished because only the frictional forces aroundhinge pin 42 need be overcome. - Once deployed and pinned through
bores leg 20 must be rotated through 90 degrees to a vertical orientation. Such movement is provided by mounting theround beam 40 in around box member 51 rigidly secured to the frame of the upper 12 throughplate members actuating tube 56 is secured to, and extends between, thebeam 40 and the comparable beam for the other of the pair oflegs 20. Acrank arm 58 is secured to the center of thetube 56 and is pinned at 60 to the clevis on the rod end of a double-actinghydraulic ram 62. The head end ofram 62 is pinned at 64 to a fixedbracket 66 rigidly secured to the upper 12. With theram 62 extended, as shown in Figure 4, theleg 20 will be in its deployed position; the center line of theleg 20 being indicated at 70. When theram 62 is contracted, as shown in phantom lines therein, theleg 20 will be rotated to its vertical position; the centerline of theleg 20 now being indicated at 72. - In order to assure that the
tubular portion 24 ofleg 20 is vertically oriented and to remove the hydraulic load on theram 62, acollar 74 engages the inner end of theround beam 40 and is arranged to function as a stop or motion limiter. Thecollar 74,round beam 40 and the actuatingtube 56, are pinned into a unitary structure by apin 76 inserted through aligned holes extending there through. Alug 78 formed on thecollar 74 is provided with a pair of radially extending stop surfaces orfaces face 80 is secured to astructural member 86 of the upper 12. The wedge block 84 is pushed against theface 80 and welded to themember 86 when thelegs 20 are vertically oriented with the upper 12 in a level position. The engagement of theface 80 with the wedge 84 thereafter positions thelegs 20 correctly to support the weight of the upper. In addition, or in the alternative, shims may be attached to the wedge block to compensate for tolerance accumulations between the two front legs. - To lock the legs in this position, a
pawl 88 is pivotally mounted by means ofpin 90 to aplate member 92 affixed betweenplate member 54 and its corresponding member on the other side of the upper's longitudinal center line. Thepawl 88 is biased by tension spring 94 toward engagement with the stop surface orface 82. When theface 80 engages the wedge block 84, thepawl 88 will snap into position engaging theface 82.Shims 96 may be secured to the free end ofpawl 88, in order to reduce back lash and to lock the cross tube members so that thelegs 20 are substantially vertical. Once theface 80 has engaged wedge block 84 andpawl 88 has engagedface 82, thelegs 20 are locked in place mechanically, and theram 62 is no longer necessary to maintain the legs vertical. - To return the
legs 20 to their stowed position, thepawl 88 is manually lifted by means ofhandle 98 so that it is free of thelug 78 and theram 62 is extended, causing thelegs 20 to rotate to their deployed position. In this position thecollar 74 and itslug 78 will have rotated until theface 82 engages theangle 100 secured between theplate 54 and its corresponding member on the other side of the upper center line. The pin that had been inserted throughbores leg 20 pivoted onpin 42 from its deployed position to its stowed position. When in its stowed position, the center of gravity of theleg 20 tends to rotate thebeam 40 in a counter clockwise direction, as viewed in Figure 4. However, the engagement of theface 82 with theangle 100 will prevent rotation in that direction. With theangle 100 resisting such rotation, there is no hydraulic load on theram 62 resulting from the restrain of such movement. Due to tolerance accumulation between the two front legs, it may be necessary to add shims to theangle 100 for engagement by theface 82 on one side in order that bothfront legs 20 will be stowed horizontally. - The
rear legs 22 for supporting the upper 12 are pivotable between an upward and inboard stowed position, shown by phantom lines in Figure 1, and an outward and downward operable position, shown by solid lines in Figures 1 and 2. The oneleg 22, shown in Figure 6, illustrates the leg in its stowed position in solid lines and in its operable position in phantom lines with the lower portion eliminated. - Referring now to Figure 6, the
rear leg 22 has atubular member 102 with a double-actingjack 104 affixed to its interior. The rod of the jack has across bore 106 for attachment of a float orpontoon 32 when in its operable position. Thetubular member 102 is attached to abeam end 108 with agusset 110 secured there between for strength. Thebeam end 108 is preferably hollow and of rectangular cross section, and is pivotally connected by means of pin 112 to arigid beam 114 affixed to the upper 12. A bellcrank 116 is rotatably mounted on the pin 112. A double actinghydraulic ram 118 has its rod end pivotally connected at 117 to the bell crank 116 and its head end pivotally connected at 119 to thebeam end 108. Asimilar ram 120 has its rod end pivotally connected at 121 to the bell crank 116 on the opposite side of the pin 112 and its head end pivotally connected at 122 to thebeam 114. With both of therams beam end 108 is substantially parallel with and overlies thebeam 114. When both of therams beam end 108 is rotated counter clockwise, as viewed in Figure 6, through approximately 180 degrees so that thebeam end 108 and thebeam 114 are aligned with thetubular member 102 substantially vertical. Thebeam end 108 andbeam 114 are then joined into a structural unit by insertion of a pin through then aligned bores 124 and 126 formed in thebeam end 108 and thebeam 114 respectively.
Claims (6)
characterized in that
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US48762983A | 1983-04-22 | 1983-04-22 | |
US487629 | 1983-04-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0126303A2 EP0126303A2 (en) | 1984-11-28 |
EP0126303A3 EP0126303A3 (en) | 1986-02-05 |
EP0126303B1 true EP0126303B1 (en) | 1990-01-10 |
Family
ID=23936516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19840104405 Expired EP0126303B1 (en) | 1983-04-22 | 1984-04-18 | Crane undecking arrangement |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0126303B1 (en) |
JP (1) | JPS6012493A (en) |
DE (1) | DE3480996D1 (en) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2925930A (en) * | 1958-05-14 | 1960-02-23 | R A Goodling | Demountable cargo box for vehicles |
US3396854A (en) * | 1967-06-19 | 1968-08-13 | Oris L. Crisp | Outrigger stabilizer for cranes |
DE1531139A1 (en) * | 1967-09-05 | 1969-10-30 | Krupp Gmbh | Support device for a truck crane or the like. |
US3624784A (en) * | 1970-06-30 | 1971-11-30 | Harnischfeger Corp | Decking and undecking apparatus for a truck crane |
DE2119030A1 (en) * | 1971-04-20 | 1972-11-09 | Fried. Krupp Gmbh, 4300 Essen | Railway crane |
DE2310525B2 (en) * | 1973-03-02 | 1977-09-01 | H Weyhausen KG, Maschinenfabrik, 2870 Delmenhorst | SUPPORT FOR A TRUCK CRANE |
US3836012A (en) * | 1973-07-09 | 1974-09-17 | Bucyrus Erie Co | Removable outrigger assembly with rotatable jack |
US3923407A (en) * | 1974-02-06 | 1975-12-02 | Fmc Corp | Mechanism for connecting and disconnecting crane sections |
FR2443356A1 (en) * | 1978-12-07 | 1980-07-04 | Vignolles Jean | Security joint for trailer stabilisers - uses two plates fitted over stanchion of chassis to allow stabilisers to pivot laterally if trailer moves |
US4273244A (en) * | 1979-01-29 | 1981-06-16 | Fmc Corporation | Crane upperstructure self-transferring system |
-
1984
- 1984-04-18 EP EP19840104405 patent/EP0126303B1/en not_active Expired
- 1984-04-18 DE DE8484104405T patent/DE3480996D1/en not_active Expired - Lifetime
- 1984-04-23 JP JP8165984A patent/JPS6012493A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0126303A3 (en) | 1986-02-05 |
JPH0210080B2 (en) | 1990-03-06 |
JPS6012493A (en) | 1985-01-22 |
DE3480996D1 (en) | 1990-02-15 |
EP0126303A2 (en) | 1984-11-28 |
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