EP0663368A1 - Hebevorrichtung - Google Patents

Hebevorrichtung Download PDF

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Publication number
EP0663368A1
EP0663368A1 EP94101219A EP94101219A EP0663368A1 EP 0663368 A1 EP0663368 A1 EP 0663368A1 EP 94101219 A EP94101219 A EP 94101219A EP 94101219 A EP94101219 A EP 94101219A EP 0663368 A1 EP0663368 A1 EP 0663368A1
Authority
EP
European Patent Office
Prior art keywords
frame
prongs
lifting device
lever
hydraulic cylinder
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Withdrawn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
EP94101219A
Other languages
English (en)
French (fr)
Inventor
Esko Vaske
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.)
VASKE-LIFT OY
Original Assignee
Vaske-Lift Oy
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 Vaske-Lift Oy filed Critical Vaske-Lift Oy
Publication of EP0663368A1 publication Critical patent/EP0663368A1/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Withdrawn legal-status Critical Current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
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
    • B66C1/24—Single members engaging the loads from one side only
    • B66C1/26—Single members engaging the loads from one side only with means for releasing the loads

Definitions

  • the present invention concerns a lifting device as defined in the preamble to Claim 1.
  • Prior technology in the field of the invention is represented by the Finnish Patent No. 64788, in which is disclosed a device for handling burdens, to be used in conjunction with cranes.
  • the device is used, for instance, when loading or unloading bricks or any other kind of stacked piece goods.
  • the device comprises a frame, prongs meant to be placed under the burden, and a flap pressing down on the burden from above.
  • the prongs and flap are connected to one and the same hydraulic cylinder by mediation of a linkage mechanism, in such manner that when a burden is being picked up the prongs first move in under the burden and the flap is then pressed against the burden.
  • the flap When the burden is being delivered, the flap first opens and the prongs move out from under the burden thereafter.
  • the device that has been disclosed has primarily been designed for lifting single piles of bricks and therefore a relatively short horizontal motion of the prongs is obtained with the linkage mechanism therein provided. If it is desired that the horizontal travel of the prongs be more extensive, i.e., when for instance a standard truck pallet is lifted, or an even greater load, the linkage mechanism and hydraulic cylinder used in the device will increase so much in length that the dimensions of the device behind the frame, or on the side which is opposite to the burden being lifted, relative to the vertical frame would increase significantly. This makes the use of the device extremely cumbersome or outright impossible in cramped lifting and loading conditions.
  • the object of the invention is to eliminate the drawbacks mentioned. It is a particular object of the invention, to disclose a novel lifting device in which comparatively long prongs can be used and they can be arranged to move through a comparatively long horizontal distance without substantially increasing the dimensions of the lifting device in the longitudinal direction of the prongs.
  • the lifting device of the invention for lifting and transporting goods comprises a vertical frame carrying on its top end a transversal support, on the lower end of said frame movable prongs movable in horizontal direction, carried by slides, and which can be pushed in under the goods, and a flap mechanism carried on the top end of the frame for steadying the goods from above.
  • the lifting device further comprises a hydraulic cylinder for operating the prongs and the flap mechanism.
  • the flap mechanism comprises a lever resting on the frame or on a support which is fixed in relation to the frame, carrying on one end a flap which rests against the load, and in addition the hydraulic cylinder is substantially vertical and rests with its upper end against said lever and with its lower end against a redirecting means, for moving the flap as well as the prongs with one and the same hydraulic cylinder.
  • the redirecting means on the lower end of the hydraulic cylinder consists advantageously of a suitable redirecting mechanism by which the substantially vertical movement of the hydraulic cylinder can be transmitted and redirected to result in a substantially horizontal movement of the prongs carried on the lower end of the frame.
  • the transversal support advantageously extends from the frame out over the load which is being handled, that is, to a point above the flap carried by said lever, to the support belonging a lifting hook, a suitable eyelet or any equivalent member for hoisting the lifting device by this member e.g. with the aid of a crane.
  • the support advantageously extends from the frame to a point above the load and the flap, obliquely upward.
  • the hoisting hook is then carried with the aid of suitable sliding rails by the support and moves along the sliding rails.
  • To the hoisting hook is connected e.g. a spring-like tension member which pulls it downward along the sliding rails, whereby the hoisting hook will move upward along the support, depending on the weight of the load, in such manner that the lifting device will keep substantially level, independent of its total weight.
  • the transversal support also extends from the frame, at its top end, to the side opposite to the load and flap, thus forming an extension, to which the lever is pivotally attached by one end.
  • the hydraulic cylinder is then, advantageously, pivotally joined to the lever at a point between the pivot point of lever and extension and the frame.
  • the lever is connected to the transversal support, on its part on the load-side of the frame, by a tension resistance, which may consist e.g. of a mechanical spring, a helical spring or another equivalent member.
  • the tension resistance has been provided to inhibit the downward movement of the lever, and at the same time of the flap, so that the lever only moves after the hydraulic cylinder has moved the prongs in under the load to be handled, whereafter the same hydraulic cylinder presses the flap against the load.
  • the redirecting means supported by the lower part of the frame consists of a linkage mechanism, i.e., of a first linkage arm pivotally attached to the piston rod of the hydraulic cylinder, the other end of this arm being pivotally contiguous with the frame, and of a second linkage arm pivotally attached to the piston rod and of which the other end is pivotally connected to be contiguous with the prongs.
  • the redirecting means comprises an elastic, or flexible, redirecting member, of which the other end is connected with the prongs so that the vertical movement of the piston rod is by action of this redirecting member transformed to produce horizontal movement of the prongs.
  • a rod of some suitable elastic material e.g. a rubber rod
  • suitable guides or guide members moves curvilinearly between the piston rod and the prongs.
  • Chains, metal wires or equivalent members running in or over appropriate guides or guide members can also be contemplated.
  • the lifting device advantageously comprises a locking means enabling downward movement of the lever to be inhibited e.g. when the load which is being handled cannot tolerate the impact from the flap upon the load.
  • the locking member may consist e.g. of a locking pin or equivalent member on the vertical frame, which is turned or pushed, or in another way positioned across the lever's path.
  • the locking member may also be located on the transversal support, and it may in this case be, for instance, a hasp-like member, a hook or equivalent by means of which the lever is locked to stay at a given distance from the transversal support.
  • the lifting device of the invention has the advantage over prior art that it is possible therein to use comparatively long prongs and, thus, the device can handle comparatively big loads which have to be lifted, without incurring any such increase of the device's dimensions that they would impede its use and its managing in cramped lifting and loading premises.
  • the lifting device of Fig. 1 as well as that of Fig. 2 comprises a vertical frame 1, on the end of which a transversal support 2 has been rigidly mounted. On the lower end of the frame two side-by-side slides or guides 3 are provided, supporting side-by-side, horizontal prongs 4. Only one of the slides and only one prong are visible in the figure.
  • the transversal support 2 is substantially horizontal, yet slightly obliquely upward directed from the frame 1 up over the prongs 4. However, the support 2 also extendsbeyond the frame 1, constituting an extension 14 having on its end a pivot point 15, at which a lever 7 extending through or past the frame 1 is pivotally attached.
  • a flap mechanism 5 pivotally attached to this end of the lever 7 in such manner that the flap keeps substantially horizontal at all times owing to its proper weight.
  • the end of the lever 7 adjacent to the flap 8 connects by a tension resistance 16, or by a spring, with the transversal support 2, above the end of the lever 7.
  • a hoisting hook 12 sliding or moving on longitudinal guides thereof.
  • the hoisting hook is furthermore connected to the end on the side of the extension 14 of the support by means of a tension member 13, e.g. a helical spring.
  • a locking member 22 On the top end of the vertical frame 1 belongs a locking member 22, a cotter pin or equivalent member, which can be pushed across the path of the lever 7 to inhibit downward movement of the lever 7 from its upper position.
  • a hydraulic cylinder 6 is pivotally attached to the underside of the lever 7, this cylinder being substantially vertical and parallel to the frame 1.
  • the redirecting means 9 consists of a first linkage arm 18, of which one end is pivotally attached to the end of the piston rod 17 and the other end is pivotally attached to the lower end of the frame 1, in the vicinity of the slide 3.
  • the redirecting means 9 further comprises a second linkage arm 19, one end thereof pivotally attached to the piston rod 17 and the other end, to the end of the prongs 4.
  • the redirecting means 9 transforms the substantially vertical movement of the piston rod 17 of the hydraulic cylinder 6 to become a substantially horizontal movement of the prongs 4.
  • the redirecting means 10 comprises an elastic and flexible redirecting member 20 attached to the end of the hydraulic cylinder's piston rod 17, this being a rubber rod travelling through or over curvilinear guides 21 and connected at its other end to the end of the prongs 4.
  • the redirecting means 10 transforms the movement of the hydraulic cylinder, substantially vertical in direction, to produce horizontal movement of the prongs 4.
  • the lifting devices depicted in Figs 1 and 2 are operated as follows. In the position at rest, the prongs are in their rear position, and the flap 8 is in the upper position. Moreover, the draw hook 12 is pulled by the spring 13 to reside comparatively close to the frame 1. Now, for lifting a burden 11, the device is with a suitable hoisting means deposited to stand beside the burden 11. By making the hydraulic cylinder 6 retract the piston rod 17, the prongs 4 are caused to enter under the burden 11 which shall be lifted. Since the movement of the prongs 4 is substantially free of resistance, they will move easily in under the burden, while the tension resistance 16 prevents any downward movement of the lever 7.
  • the lifting hook 12 moves along the transversal support 2, obliquely upward against the pull of the tension means 13, the length of sliding depending on the weight of the burden which is being lifted.
  • the lifting hook is thus made to move in accordance with the burden's weight approximately so that the lifting device always maintains a substantially upright orientation while lifting is going on.
  • the hydraulic cylinder 6 When the burden 11 is lowered by the lifting device, the hydraulic cylinder 6 first releases the flap 8 from over the burden 11, owing to the pull of the tension resistance 16. Only thereafter are the prongs 4 withdrawn from under the load, into their rear position, and the lifting means can be transported to the next point where lifting has to be done.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP94101219A 1994-01-13 1994-01-27 Hebevorrichtung Withdrawn EP0663368A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI940157A FI940157A0 (fi) 1994-01-13 1994-01-13 Lyftanordning
FI940157 1994-01-13

Publications (1)

Publication Number Publication Date
EP0663368A1 true EP0663368A1 (de) 1995-07-19

Family

ID=8539425

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101219A Withdrawn EP0663368A1 (de) 1994-01-13 1994-01-27 Hebevorrichtung

Country Status (2)

Country Link
EP (1) EP0663368A1 (de)
FI (1) FI940157A0 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102658978A (zh) * 2012-04-27 2012-09-12 武汉理工大学 砖堆整形机械装置
CN103754754A (zh) * 2014-01-28 2014-04-30 常州大学 薄壁圆筒工件吊具
CN103950819A (zh) * 2014-04-15 2014-07-30 长春宝钢钢材贸易有限公司 板料吊具
CN104803277A (zh) * 2015-03-25 2015-07-29 上海大众祥源动力供应有限公司 一种用于板材堆垛的剪式吊具
CN105600667A (zh) * 2016-03-30 2016-05-25 江苏科技大学 一种车用大拖板吊具
CN109335955A (zh) * 2018-11-21 2019-02-15 彭晓艳 货物吊装架

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224356A (en) * 1923-10-15 1924-11-13 Sidney Burgess A new or improved device for discharging or loading goods into railway vehicles and the like
US2757035A (en) * 1953-12-30 1956-07-31 Otto J Buehler Lifting forks
US3069196A (en) * 1961-05-29 1962-12-18 Bickerstaff Inc Apparatus for lifting stacks of building units
GB1147900A (en) * 1966-12-23 1969-04-10 Samuel Burns & Company Ltd A lifting attachment for use with a mechanical handling apparatus
CH540849A (de) * 1972-02-29 1973-08-31 Stierli Othmar Lasttragvorrichtung
FI64788B (fi) * 1981-06-17 1983-09-30 Esko Kalevi Vaske Anordning foer hantering av boerdor
EP0298712A1 (de) * 1987-07-10 1989-01-11 Sanderson (Forklifts) Limited Lasthandhabungsfahrzeuge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB224356A (en) * 1923-10-15 1924-11-13 Sidney Burgess A new or improved device for discharging or loading goods into railway vehicles and the like
US2757035A (en) * 1953-12-30 1956-07-31 Otto J Buehler Lifting forks
US3069196A (en) * 1961-05-29 1962-12-18 Bickerstaff Inc Apparatus for lifting stacks of building units
GB1147900A (en) * 1966-12-23 1969-04-10 Samuel Burns & Company Ltd A lifting attachment for use with a mechanical handling apparatus
CH540849A (de) * 1972-02-29 1973-08-31 Stierli Othmar Lasttragvorrichtung
FI64788B (fi) * 1981-06-17 1983-09-30 Esko Kalevi Vaske Anordning foer hantering av boerdor
EP0298712A1 (de) * 1987-07-10 1989-01-11 Sanderson (Forklifts) Limited Lasthandhabungsfahrzeuge

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102658978A (zh) * 2012-04-27 2012-09-12 武汉理工大学 砖堆整形机械装置
CN103754754A (zh) * 2014-01-28 2014-04-30 常州大学 薄壁圆筒工件吊具
CN103754754B (zh) * 2014-01-28 2016-04-06 常州大学 薄壁圆筒工件吊具
CN103950819A (zh) * 2014-04-15 2014-07-30 长春宝钢钢材贸易有限公司 板料吊具
CN104803277A (zh) * 2015-03-25 2015-07-29 上海大众祥源动力供应有限公司 一种用于板材堆垛的剪式吊具
CN105600667A (zh) * 2016-03-30 2016-05-25 江苏科技大学 一种车用大拖板吊具
CN105600667B (zh) * 2016-03-30 2017-06-23 江苏科技大学 一种车用大拖板吊具
CN109335955A (zh) * 2018-11-21 2019-02-15 彭晓艳 货物吊装架

Also Published As

Publication number Publication date
FI940157A0 (fi) 1994-01-13

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