EP2275378A1 - Gerüstbrücke für Baumaschinen - Google Patents

Gerüstbrücke für Baumaschinen Download PDF

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Publication number
EP2275378A1
EP2275378A1 EP10169350A EP10169350A EP2275378A1 EP 2275378 A1 EP2275378 A1 EP 2275378A1 EP 10169350 A EP10169350 A EP 10169350A EP 10169350 A EP10169350 A EP 10169350A EP 2275378 A1 EP2275378 A1 EP 2275378A1
Authority
EP
European Patent Office
Prior art keywords
condition
gantry
lever
pin
upper rear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10169350A
Other languages
English (en)
French (fr)
Inventor
Yasuhiko Murayama
Kazuhiro Katada
Kazuyuki Miyazaki
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.)
Kobelco Cranes Co Ltd
Original Assignee
Kobelco Cranes Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kobelco Cranes Co Ltd filed Critical Kobelco Cranes Co Ltd
Publication of EP2275378A1 publication Critical patent/EP2275378A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes

Definitions

  • the present invention relates to a gantry used in such construction machinery as crane, pile driver and so on. Particularly in detail, it relates to the gantry whose rear legs are folded down into two pieces and whose front legs are laid over the rear legs downward and backward for storage while transportation.
  • the construction machinery such as crane or pile driver is furnished with a working attachment on a front section of a revolving frame of an upper revolving body.
  • a gantry also referred to an A-frame or type A-frame
  • the gantry is furnished in order to execute the prescribed motions in relation to works of the working attachment.
  • the gantry is used to support a boom from its back side by means of wire ropes.
  • the gantry is used to raise a leader by means of wire ropes.
  • This kind of gantry is known and disclosed, for example, in Japanese Patent Laid Open No. 2000-198672 .
  • This conventional example is shown in Fig. 11 and Fig. 12 .
  • Bottom ends of front legs 103 are rotatably supported on the revolving frame by means of a mounting bracket 102.
  • the end (the top) of upper rear legs 104 are connected to the top of the front legs 103.
  • the tops of lower rear legs 107 are connected by means of sliding pins 106.
  • the bottom end of the lower rear legs 107 are supported on the revolving frame 101 so as to turn freely.
  • both the lower rear legs 107 and the upper rear legs 104 extend along a substantially vertical line, and also the front legs tilt backward and upward.
  • the lower rear legs 107 and the upper rear legs 104 are folded, and the front legs 103 are tilted backward and laid over the rear legs when the gantry 100 is in a stowed condition.
  • a hydraulic cylinder 108 is straddle-mounted between the lower portion of the front legs 103 and the revolving frame 101.
  • the telescopic motion of the hydraulic cylinder 108 causes the front legs 103 to turn in the raising direction or in the falling direction around a bearing shaft 111.
  • a connecting member 113 which is provided with a pin hole 112 at the top of the connecting member 113 is prepared in the middle of the front legs 103.
  • a mounting bracket 114 which is provided with a pin hole at the top thereof is provided on the revolving frame 101.
  • the pin hole 112 on the above mentioned connecting member 113 matches with a pin hole on the mounting bracket 114.
  • the connecting member 113 is connected to the mounting bracket 114. By doing so, the gantry 100 is kept stowed.
  • FIG.3 Another gantry as shown in Fig.3 , for example, is known in order to solve such a problem like this.
  • This gantry 100 is provided with a connecting rod 121 whose one end is rotatably connected to a connecting joint between the front leg 103 and the upper rear leg 104.
  • the connecting rod 121 By connecting the other end of the above mentioned connecting rod 121 to the rear end of the revolving frame 101, the gantry 100 is kept in the stowed condition.
  • the basic configuration of the gantry structure shown in Fig. 13 is almost the same as shown in Fig. 11 and Fig. 12 , so the same parts and components are given the same numbers, and the same explanations on them are omitted.
  • An object of the present invention is, preventing a latch member from being damaged by forgetting disengaging a latch mechanism, to supply a gantry for the construction machinery which is capable of preventing a connecting rod and upper rear legs from being damaged.
  • the gantry of the present invention is mounted on a base frame of construction machinery.
  • This gantry is provided with a front leg whose bottom end is rotatably supported on a base frame, an upper rear leg whose one end is connected to the top of the front leg and the lower rear leg whose top is connected to the other end of the upper rear leg and whose bottom end is rotatably supported to the base frame.
  • the construction machinery is in a working condition, the lower rear leg and the upper rear leg are located substantially along a vertical line and the front leg tilts backward and upward.
  • the gantry of the construction machinery is in a stowed condition, the lower rear leg and the upper rear leg are folded down backward, and the front leg is laid over the rear legs.
  • one end of the connecting rod connected to the base frame in order to hold the gantry in the stowed condition is rotatably connected.
  • a pin that protrudes in the lateral direction is provided on the other end of the connecting rod.
  • a lock mechanism which is capable of engaging with the pin is provided on the upper rear leg. In accordance with the movement folding the lower rear leg and the upper rear leg in order to change the gantry from the working condition to the stowed condition, this lock mechanism disengages the locked condition with the pin.
  • the gantry of the present invention because the locked condition between the lock mechanism and the pin is disengaged together with the movements in accordance with the movement folding the lower rear leg and the upper rear leg in order to change the gantry from the working condition to the stowed condition, the gantry of the present invention does not cause possible damages on the lock member by careless omitting to disengage the lock mechanism, and it also does not cause damages on the connecting rod and the upper rear leg.
  • a lock mechanism having a catch slot whose base end is fixed on the upper rear leg and whose upper and top portion are able to engage with the pin may be used.
  • the locked condition formed by the lock mechanism and the pin is fulfilled by the condition that the catch slot on the lock plate fixed on the upper rear leg engages with the pin.
  • the locked condition between the lock mechanism and the pin is disengaged by means of the relative off-set between the lock plate and the pin. Accordingly, simplifying the lock mechanism, the disengagement of the locked condition is automatically and securely performed.
  • the mechanism having a mounting plate, a holder, a lever, a link member and a spring member may be also used.
  • the mounting plate is fixed on the upper rear leg.
  • the holder is rotatably supported on a support pin around a supporting axis.
  • the lever is rotatably supported on a pin of the mounting plate around another supporting axis, and secures the pin in the locked condition together with the holder.
  • the link member connects one end of the lever to the holder so that the lever and the holder may rotate together between the locked condition and the unlocked condition.
  • the spring member imposes the force on the lever and the holder to hold the locked condition when they are in the locked condition.
  • the pin pushes the lever of the lock mechanism against the force generated by the spring member and places the lever and holder in the unlocked position.
  • the pin pushes the connecting end of the link member to put the lever and the holder into the locked condition.
  • the locked condition formed by the lock mechanism and the pin is placed in the locked condition in which the lever and the holder of the lock mechanism secures the pin, and this locked condition is achieved by holding the spring member.
  • this locked condition is disengaged by the pin which pushes the lever against the force generated by the spring member so that the lever and the holder becomes the unlocked condition, when the lower rear leg and the upper rear leg are folded in order to change the gantry from the stowed condition to the working condition. Therefore, the disengagement of the locked condition is automatically and securely performed.
  • the connecting rod being hung down from the connecting portion to which the front leg and the upper rear leg are connected approaches near the upper rear leg. Then, the pin at the side of the connecting rod pushes the connecting end of the link member so that the lever and the holder secure the pin in the locked position, so the locked condition is automatically and securely performed. Accordingly, the maneuverability is improved.
  • a spring member consisting of an L shaped lever and a coil spring may be used.
  • This lever is rotatably supported on a pin at the center of the lever.
  • the one end of this spring member is hooked at the middle portion between a rotating point and an end portion connected to the link member, while the other end is hooked at the mounting plate respectively.
  • a center line locates closer to the link member than to the rotating point so that the spring force is imposed so as to hold the unlocked condition.
  • the center line locates farther to the link member than to the rotating point, so that the spring force is imposed so as to hold the unlocked condition.
  • the spring member consisting of a coil spring whose both ends are hooked at the lock plate and at the middle portion between the rotating point and the end portion connected to the link member respectively, displays not only the original function of holding the locked condition, but also another function of holding the unlocked condition by reversing of the spring force when the lever and the holder of the lock mechanism are in the locked condition. Accordingly, lessening the number of parts to be used, it is possible to improve the reliability of operation.
  • Fig. 1 shows a general configuration of a crawler crane as construction machinery which is equipped with a gantry relating to the first embodiment of the present invention.
  • the numeral 1 denotes a crawler type lower propelling body.
  • the numeral 2 denotes an upper revolving body which is rotatably mounted on the lower propelling body 1.
  • the upper revolving body 2 is provided with a revolving frame 2a as a mounting base.
  • a base end of a boom 3, as a working attachment is attached so as to be raised or lowered.
  • a gantry 4 and a counterweight 5 are installed on a rear end of the revolving frame 2a.
  • a boom raising/lowering rope 9 is wound.
  • One end of the raising/lowering rope 9 is fixed on the gantry 4, while the other end of the rope is wound on a boom raising/lowering drum 10 which is installed on the rear section of the upper revolving body (revolving frame 2a).
  • the boom raising/lowering drum 10 makes the distance between the lower spreader 8 and the upper spreader 7 longer or shorter by winding off or winding in the rope. With this arrangement, the boom 3 is raised and lowered.
  • boom point sheaves 11, idler sheaves 12 and auxiliary sheaves 13 are rotatably installed respectively.
  • a main hook 14 is held on a main hoist rope 15 and hung down from the boom point sheaves 11.
  • An auxiliary hook 16 is held on an auxiliary hoist rope 17 and hung down from the auxiliary point sheaves 13.
  • One end of the main hoist rope 15 is fixed on the top section of the boom 3.
  • the other end of the hoist rope 15 is wound on a main hoist drum 18 installed on the upper revolving body via the boom point sheaves 11 and the idler sheaves 12. Accordingly, main hoist drum 18, the main hook 14 is hoisted or lowered with the main hoist rope 15.
  • auxiliary hoist rope 17 is fixed on the auxiliary hook 16.
  • the other end of the auxiliary hoist rope 17 is wound on an auxiliary hoist drum 19 installed on the upper revolving body 2 via the auxiliary sheave 13 and idler sheave 12. Accordingly, auxiliary hoist drum 19, the auxiliary hook 16 is hoisted or lowered.
  • the revolving frame 2a of the above mentioned upper revolving body 2 is formed by a left-and-right pair of side plates 2b (shown on the right hand side only) and a bottom plate 2c which connects the side plates 2b. Between the left-and-right of the side plates 2b on the revolving frame 2a, the main hoist drum 18, the auxiliary hoist drum 19, a third drum 20 and the boom rising/lowering drum 10 are arranged in turn from the front in the condition that all shafts of the drums are vertically crossed with the centerline of the revolving frame. Although it is not illustrated on the drawing, these drums are installed on the side plates or the bottom plate of the revolving frame 2a by means of mounting brackets.
  • the above mentioned gantry 4 is provided with front legs 22, upper rear legs 24 and lower rear legs 28 as shown in Fig. 3 .
  • these legs have a pair of legs on each left and right side respectively
  • Fig. 3 shows the legs on the right side only.
  • the bottom end of the front legs 22 is rotatably supported on a support pin 21 which is mounted on the side plate 2b of the above mentioned revolving frame 2a.
  • Each end (top end) of the upper rear legs 24 is connected to top end of the front legs 22 so that the upper rear legs 24 can rotate around pins 23.
  • the top of lower rear legs 28 are connected to the other ends (bottom ends) of the upper rear legs 24 with two connecting pins 25 and 26, and the bottom ends of the rear lower legs are rotatably supported on support pins 27 which are mounted on the side plates 2b of the above mentioned revolving frame 2a.
  • both of the lower rear legs 28 and the upper rear legs 24 extend substantially along the vertical line, and the front legs 22 tilt backward and upward.
  • the lower rear legs 28 and the upper rear legs 24 are folded by rotating them around the connecting pins 26 after the connecting pins 25 are removed, and then the front legs 22 are tilted backward and laid down over the rear legs.
  • the above mentioned gantry 4 is provided with a hydraulic cylinder 32 which is straddle-mounted between the lower portion of the front legs 22 and the revolving frame 2a, The telescopic motion of the hydraulic cylinder 32 causes the front legs 22 to turn around a pin 21.
  • a connecting member 34 is installed so as to extend in the lateral direction.
  • the above mentioned lower spreader 8 is installed.
  • one end of a connecting rod 35 is rotatably mounted on a connecting pin 36.
  • a pin hole 37 provided on the other end of the connecting rod 35 is aligned with a pin hole 38 provided on the rear end of the side wall 2b of the revolving frame 2a, and then a connecting pin (not shown) is inserted into both pin holes 37 and 38.
  • the connecting rod 35 holds the folded condition of the gantry 4 by connecting the connecting joint 33 to the revolving frame 2a.
  • a catch pin 41 which cross section view is a circle and which protrudes in the lateral direction is provided.
  • a plate 42 engaged with the catch pin 41 is fixed.
  • the plate 42 is provided with a semicircular catch slot 43 whose upper surface engages with the catch pin 41 as shown in Fig. 4 showing a magnified and detail view of the catch plate 42.
  • the engagement between the catch slot 43 of the catch plate 42 and the catch pin 41 is disengaged, as shown in Fig. 5 , when the upper rear legs 24 turn forward (towards the front legs 22) in order that the gantry 4 is changed from the working condition to the stowed condition by folding the lower rear legs 28 and the upper rear legs 24.
  • the other end of the connecting rod 35 whose one end is rotatably connected to the connecting joint 33 which connects the front leg 22 and the upper rear leg 24 in the working condition of the gantry 4 is connected to the upper rear leg 24 by the engagement of the catch pin 41 provided at the other end and the catch slot 43 of the plate 42. Therefore, during the machine operation, as the connecting rods 35 do not sway to bump against the upper rear legs 24, generating bumping sounds and scratching on painted surfaces are prevented from occurring.
  • the engagement between the catch slot 43 on the above mentioned catch plate 42 and the catch pin 41, as shown in Fig. 5 , is disengaged by the movements while folding the lower rear legs 28 and the upper rear legs 24, so that the gantry 4 may be changed its position from the working condition to the stowed condition. Therefore, damages on the catch members consisting of the catch plates 42 and the catch pins 41, which may cause by carelessly omitting to disengage the latch mechanism, can be eliminated. Damages on the connecting rod 35 and the upper rear leg 24 may also be eliminated.
  • the first embodiment can avoid the damages of those members.
  • the catch plate 42 has the base end fixed on the upper rear legs 24 and the edge end whose upper side is formed as the catch slot 43 so as to be engaged with the catch pin41, and the catch plate 42 is a single part as the catch mechanism. Accordingly, the first embodiment can simplify the catch mechanism and is superior in practical use.
  • Fig. 6 shows a gantry of a crawler crane of the second embodiment of the present invention.
  • the configurations of a connecting rod 50 and lock mechanism 60 are different from those of the first embodiment.
  • the basic configuration of the gantry is the same as the first embodiment, and the same numbers are allocated to the same parts and components, accordingly the explanations about them are omitted.
  • the one end of the above mentioned connecting rod 50 is rotatably mounted, as well as that of the first embodiment, around the connecting pin 51 that is located more rearward and higher than the support pin 23 of the connecting joint 33 between the front legs 22 and the upper rear legs 24.
  • a couple of pin holes 52 and 53 are provided at the other end of the connecting rod 50.
  • the lock mechanism 60 being capable of coupling with lock pin 54 is provided on the upper rear leg 24.
  • This lock mechanism 60 is provided with a mounting plate 61, an approximately U-shaped holder 63, an L-shaped lever 65, a link member 66 and a spring member 67.
  • the mounting plate 61 is fixed on the upper rear leg 24.
  • the holder 63 is rotatably supported around the support pin 62 on the mounting plate 61.
  • the lever 65 is supported by the mounting plate 61 and is rotatably mounted around the support pin 64, and secures the lock pin 54 in a coupled condition by clamping the lock pin 54 together with the holder 63.
  • the link member 66 connects the one end of the lever 65 and the one end of the holder 63, so that the lever 65 and the holder 63 may rotate together between the locked condition (shown in Fig. 7 ) where the lever 65 and the holder 63 hold the pin 54 and the unlocked condition (shown in Fig. 8 ) which disengages the locked condition.
  • the spring member 67 imposes the force to hold the locked condition when the above lever 65 and the holder 63 are in the locked position.
  • the lever 65 is rotatably supported around the support pin 64 at a center section which is a bent portion.
  • the above mentioned spring member 67 is composed of a tensile coil spring. The one end of this spring member 67 is hooked at the lever 65 in the middle portion between a through hole for the support pin 64 and the connection point of the link member 66. The other end of the spring member 67 is hooked at the upper portion of the mounting plate 61.
  • the spring member 67 as shown in Fig.
  • the lock pin 54 on the connecting rod 50 pushes the connecting portion of the link member 66 connected to the lever 65 of the lock mechanism 60 on the upper rear leg 24, so that the lever 65 and the holder 63 secure the pin 54 in the locked position (referring to Fig. 9(c) ).
  • the movement of the connecting rod 50 is limited only to the right and left directions. Therefore, the lever 65 of the lock mechanism 60 is not pushed to open and the locked condition is not unlocked.
  • this second embodiment of the present invention being similar to the first embodiment of the present invention, when the gantry is in the working condition, because the other end of the connecting rod 50 is connected to the upper rear legs 24 by the lock pin 54 engaged with the lock mechanism 60, there is no possibility that the connecting rod 50 sways during the machine operation and also bumps against the upper rear legs 24. Therefore, it is possible to prevent the rod from making scratch marks on the painting surface and from generating bumping sounds.
  • engagement or disengagement of the locked condition between the lock mechanism 60 and the lock pin 54 is performed automatically and securely. For this reason, it is possible to prevent the lock member, consisting of each part of the lock mechanism 60 and the lock pin 54 and so on, from being damaged due to forgetting disengaging the lock mechanism. Accordingly, the maneuverability is improved.
  • the spring member 67 of the lock mechanism 60 when the lever 65 and the holder 63 of the lock mechanism 60 are in the locked condition, not only displays the original function of holding the locked condition, but also displays the other function of holding the unlocked condition caused by the spring force when the lever 65 and the holder 63 of the lock mechanism 60 are in the unlocked condition. Accordingly, lessening the number of parts to be used, it is possible to improve the reliability of operation.
  • the present invention is not limited to the above mentioned first and second embodiments, but includes a variety of other embodiments.
  • the one end of the connecting rod 35, 50 holding the gantry 4 in the folded condition is connected to the connecting joint 33 of the front legs 22 and the upper rear legs 24 of the gantry 4 and that the other end of the connecting rod 35, 50 is connected by a pin to the pin hole 38 provided on the rear end of the side wall 2b of the revolving frame 2a when the gantry 4 is in the stowed condition.
  • the present invention is not limited to this example, but also applied to the case that the other end of the connecting rod 35, 50 is connected by a pin to a pin hole provided on the counterweight 5 when the gantry 4 is in the stowed condition.
  • the present invention may be also applied to a mechanism that facilitates the connecting rod 35, 50 to change the rod length at two levels, long or short, so that the pin hole where the other end of the connecting rod to be fixed may be selected either on the side plate 2b of the revolving frame 2a or on the counter weight 5 when the gantry 4 is in the stowed condition.
  • the holder 63 and the lever 65 in the rock mechanism 60 are separately rotatably supported around each support pin 62 and 64 against the mounting plate 61 fixed on the upper rear legs 24.
  • the present invention allows a configuration to rotate around the same support pin.
  • the link member 66 which connects the holder 63 and the lever 65 is not limited to a single link as mentioned in the second embodiment, but may involve a plurality of links.
  • the present invention is not limited to the gantry configuration of the crawler crane as mentioned above, but also applicable to the configuration of the gantry of construction machines other than crawler cranes.
  • a gantry 4 is composed of front legs 22, upper rear legs 24 and lower rear legs 28.
  • the lower rear legs 28 and the upper rear legs 24 extend along a vertical line and the front legs 22 tilt backward and upward.
  • the lower rear legs 28 and the upper rear legs 24 are folded and the front legs 22 are laid down backward.
  • a connecting joint 33 where the front legs 22 and the upper rear legs 24 are connected, one end of the connecting rod 35 that secures the stowed condition is rotatably connected.
  • a pin 41 is provided on the other end of this connecting rod 35.
  • On the upper rear legs 24, a lock mechanism which is capable of engaging with the pin 41 is provided.
  • the lock mechanism 42 disengages the locked condition with the pin 41 in accordance with the movement of folding the lower rear legs 28 and the upper rear legs 24 in order to change the gantry from the working condition to the stowed condition. It is possible to prevent the lock member, the connecting rod and the upper rear legs from being damaged by forgetting disengaging the lock mechanism.
EP10169350A 2009-07-16 2010-07-13 Gerüstbrücke für Baumaschinen Withdrawn EP2275378A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009168175 2009-07-16
JP2009276916A JP4770978B2 (ja) 2009-07-16 2009-12-04 建設機械のガントリ構造

Publications (1)

Publication Number Publication Date
EP2275378A1 true EP2275378A1 (de) 2011-01-19

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EP10169350A Withdrawn EP2275378A1 (de) 2009-07-16 2010-07-13 Gerüstbrücke für Baumaschinen

Country Status (3)

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EP (1) EP2275378A1 (de)
JP (1) JP4770978B2 (de)
CN (1) CN101955134A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2476642A1 (de) * 2011-01-12 2012-07-18 Manitowoc Crane Companies, LLC Verfahren zum Verbinden von Kranaufhängungsanordnungsabschnitten miteinander und dafür verwendete rahmenmontierte Anordnung
US10703614B2 (en) 2016-06-30 2020-07-07 Kobelco Construction Machinery Co., Ltd. Gantry for construction machine
EP3943438A1 (de) * 2020-07-21 2022-01-26 Liebherr-Werk Nenzing GmbH Fahrbarer kran mit teilbarem a-bock
US11577943B2 (en) * 2019-11-22 2023-02-14 Liebherr-MCCtec Rostock GmbH Crane with an erecting trestle

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
JP6428740B2 (ja) * 2016-10-06 2018-11-28 コベルコ建機株式会社 ガントリ組立装置およびガントリ組立方法
JP6881128B2 (ja) * 2017-07-24 2021-06-02 コベルコ建機株式会社 ガントリを備えた建設機械
CN112012094B (zh) * 2020-09-22 2021-12-07 同济大学 适用于桥面的可调角度的抑流板装置

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US3977530A (en) * 1974-06-13 1976-08-31 The Manitowoc Company, Inc. Crane with gantry backhitch and boom hoist assembly removable as a unit
JP2000198672A (ja) 1999-01-08 2000-07-18 Hitachi Constr Mach Co Ltd 建設機械のａ型フレ―ム

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JP3018918B2 (ja) * 1994-09-21 2000-03-13 トヨタ車体株式会社 簡易クレーン付荷物運搬用車両
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JP2009091088A (ja) * 2007-10-05 2009-04-30 Toyota Auto Body Co Ltd 車載用クレーン装置

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Publication number Priority date Publication date Assignee Title
US3335877A (en) * 1966-04-18 1967-08-15 Bucyrus Erie Co Lowerable a-frame assembly for mobile cranes and the like
US3977530A (en) * 1974-06-13 1976-08-31 The Manitowoc Company, Inc. Crane with gantry backhitch and boom hoist assembly removable as a unit
JP2000198672A (ja) 1999-01-08 2000-07-18 Hitachi Constr Mach Co Ltd 建設機械のａ型フレ―ム

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2476642A1 (de) * 2011-01-12 2012-07-18 Manitowoc Crane Companies, LLC Verfahren zum Verbinden von Kranaufhängungsanordnungsabschnitten miteinander und dafür verwendete rahmenmontierte Anordnung
US9132999B2 (en) 2011-01-12 2015-09-15 Manitowoc Crane Companies, Llc Method of connecting crane suspension assembly sections together and frame mounted assembly used therefore
RU2587746C2 (ru) * 2011-01-12 2016-06-20 МАНИТОВОК КРЕЙН КАМПЕНИЗ, ЭлЭлСи Способ соединения вместе секций узла подвески крана и используемый в нем узел ворота
US10703614B2 (en) 2016-06-30 2020-07-07 Kobelco Construction Machinery Co., Ltd. Gantry for construction machine
US11577943B2 (en) * 2019-11-22 2023-02-14 Liebherr-MCCtec Rostock GmbH Crane with an erecting trestle
EP3943438A1 (de) * 2020-07-21 2022-01-26 Liebherr-Werk Nenzing GmbH Fahrbarer kran mit teilbarem a-bock

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JP4770978B2 (ja) 2011-09-14
JP2011037628A (ja) 2011-02-24
CN101955134A (zh) 2011-01-26

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