EP1498383A1 - Lifting fork comprising a balancing device for transporting pallets with a crane - Google Patents

Lifting fork comprising a balancing device for transporting pallets with a crane Download PDF

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Publication number
EP1498383A1
EP1498383A1 EP04380149A EP04380149A EP1498383A1 EP 1498383 A1 EP1498383 A1 EP 1498383A1 EP 04380149 A EP04380149 A EP 04380149A EP 04380149 A EP04380149 A EP 04380149A EP 1498383 A1 EP1498383 A1 EP 1498383A1
Authority
EP
European Patent Office
Prior art keywords
pallet
pallet holder
stud
pin
holder
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Withdrawn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
EP04380149A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jesus Berrocal Gonzalez
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1498383A1 publication Critical patent/EP1498383A1/en
Withdrawn legal-status Critical Current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

Definitions

  • This invention refers to a device to be fitted to the arms used to handle pallets (pallet holder), by means of which, with the assistance of a crane, the loading, unloading and transport operations of the pallets can be easily, conveniently and safely carried out, avoiding any risk or danger to the people who may be involved in the above indicating handling operations.
  • the purpose of the invention after it is installed on a conventional pallet holder, is to succeed in making it automatically adopt the most suitable working position, both with load and in idle (empty) state.
  • one of the classic forms of handling pallets with a load is by means of a crane or derrick, such as the one some trucks have built onto their trailers for product loading and unloading.
  • a metal arm or pallet holder is normally used for these handling operations, with U-shaped profiles formed and joined so that they provide practically complete security and stability.
  • Such a pallet holder consists of two parallel arms, placed at a suitable distance to fasten to the base of the pallet. These arms are joined at the back to a metal structure with U-shaped profiles, the middle section of which has a triangular shape and on whose upper vertex a metallic structure is incorporated and to which a round profile is secured. This is were a ring is included for attaching the crane hook to be able to manipulate the load.
  • the device proposed in this invention fully and successfully solves the above mentioned problem, as it automatically solves the potential problems of location of the hook with respect to the pallet holder, as well as the fitting and leveling of the pallet holder before, during and after handling.
  • the proposed device is easily connected to the upper arm of any pallet holder. In this way, it is not necessary for the arm to have a built-in rod, with different shapes in front and in back, for the ring to which the crane hook is attached.
  • This rod is made unnecessary by the device proposed in this invention, as it has two connecting rod type arms, in asymmetric T-shape, and is joined to the upper arm of the pallet holder, with the particularity that the axis of counterbalance of this connecting rod is located appreciably in correspondence with the vertical that passes through the center of gravity of the pallet holder, whereas the upper asymmetric part of the connecting rod, to which the suspension ring is associated, is oriented towards the vertical and middle section of the pallet holder, tending towards the limit situation of approach to this vertical section by the action of coils or springs with which it is provided, which run between the lateral prolongation of the connecting rod and the vertical section of the pallet holder.
  • two connecting rods will be attached to the pallet holder, with their corresponding coils or springs that are suitably interrelated and located on both sides of the upper arm of the pallet holder.
  • the above mentioned coils or springs are joined to the vertical section of the pallet holder structure by means of the hook shape provided at the ends of these springs. These act by pressure on their connecting ends, in the form of studs with grooved ends on which the connection is made.
  • these springs keep the suspension ring of the pallet holder in a situation of maximum proximity to the vertical section of the structure, when the pallet holder is empty and even when it is suspended from this ring, and the pallet holder adopts an inclined position that favours penetration of its arms underneath a loaded pallet after the pallet holder is secured to the pallet.
  • the double connecting rod tilts counter to the springs that assists it until a limit situation is reached in which this double connecting rod is located vertically, in correspondence with the vertical passing through the center of gravity o the load, thereby providing maximum stability.
  • the arrangement of the device to be fitted to a pallet holder, mounted on a conventional pallet holder can be observed.
  • These show a pair of parallel, lower arms (1), of a suitable length and a suitable distance for connection to the pallet and rigidly secured to the vertical section (2) of a U-shaped profile structure, which converges in an upwards direction with an isosceles triangular shape that receives, on this upper end, an arm (3) that completes the structure's U-shaped profile.
  • the device proposed in this invention is fitted onto the arm (3); this device consists of a set of two parallel arms or connecting rods (5) in asymmetric T-shape (6), interconnected by two different, distinct elements, i.e. an articulated transversal tilting axis (4) and transversal pin (7).
  • the upper parallel parts of the T (6) are interconnected by a pin or stud (9); a ring (8) is fixed to the pin (7) for attaching the crane hook.
  • the pin or stud (9) that joins the upper parts of the connecting rod has grooved ends to be able to fit onto these grooves the hooked ends of the coils or springs (10), which are fitted at their other end onto another pin or stud (11), which is also grooved at its ends, and that will be secured to the vertical section (2) of the pallet holder at the back.
  • coils or springs (10) are the elements that, when suitably and completely tautened, allow and facilitate the tilting movement of the connecting rods (5), (6) against the upper arm (3) of the pallet holder.
  • the assembly adopts the position shown in Figure 2 when the pallet holder is empty, as the springs tautness (10) is greater than the weight of the pallet holder in an empty state, so that the suspension point is markedly off center with respect to the vertical of the assembly's center of gravity; this makes the structure tilt and the lower arms (1) slant downwards, thus facilitating penetration of the pallet holder underneath the loaded pallet.
  • the springs tautness (10) is less than the weight of the loaded pallets, so that once the pallet is loaded onto the pallet holder and the crane hook, hooked onto the ring (8), is lifted and pulled in an upwards direction, the springs (10) slacken and make the connecting rod (5), (6) adopt a practically vertical position coinciding with the vertical of the center of gravity of the assembly formed by the pallet holder and loaded pallet.
  • the loaded pallet will be hoisted up to its destination under optimal conditions of stability and security because, as the device connected to the pallet holder and its load is automatically aligned/unaligned, these effects are also automatically achieved between the center of gravity of the pallet holder and that of the load to be transported, in keeping with the objective of the proposed invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pallets (AREA)
EP04380149A 2003-07-18 2004-07-16 Lifting fork comprising a balancing device for transporting pallets with a crane Withdrawn EP1498383A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200301730U ES1055957Y (es) 2003-07-18 2003-07-18 Dispositivo acoplable a portapalets
ES200301730 2003-07-23

Publications (1)

Publication Number Publication Date
EP1498383A1 true EP1498383A1 (en) 2005-01-19

Family

ID=31897116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04380149A Withdrawn EP1498383A1 (en) 2003-07-18 2004-07-16 Lifting fork comprising a balancing device for transporting pallets with a crane

Country Status (2)

Country Link
EP (1) EP1498383A1 (es)
ES (1) ES1055957Y (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102153015A (zh) * 2011-04-15 2011-08-17 张树文 用于长型材吊装自动机械手的吊钩连接装置
KR101318018B1 (ko) 2011-03-31 2013-10-14 ( 주 ) 화신 핑거 프레임 기구
CN109335955A (zh) * 2018-11-21 2019-02-15 彭晓艳 货物吊装架
WO2019183698A1 (pt) * 2018-03-28 2019-10-03 Cava Antonio Carlos Barberena Mecanismo transportador de bolsas flexíveis

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB791430A (en) * 1956-11-13 1958-03-05 Templewood Engineering Company Improvements relating to lifting forks
DE1265949B (de) * 1963-01-14 1968-04-11 Constral A G Krangabel mit schwenkbarem Schutzkorb und Gewichtsausgleichmechanismus
FR1545007A (fr) * 1966-11-19 1968-11-08 Dispositif de chargement avec réglage automatique de l'alignement du centre de gravité et du point de suspension
DE7215908U (de) * 1973-05-30 Luigart A U Sohn Vorrichtung zum Transport von Paletten durch Hebezeuge
GB2172572A (en) * 1985-03-21 1986-09-24 Pilkington Brothers Plc Improvements in or relating to apparatus for carrying glass sheets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7215908U (de) * 1973-05-30 Luigart A U Sohn Vorrichtung zum Transport von Paletten durch Hebezeuge
GB791430A (en) * 1956-11-13 1958-03-05 Templewood Engineering Company Improvements relating to lifting forks
DE1265949B (de) * 1963-01-14 1968-04-11 Constral A G Krangabel mit schwenkbarem Schutzkorb und Gewichtsausgleichmechanismus
FR1545007A (fr) * 1966-11-19 1968-11-08 Dispositif de chargement avec réglage automatique de l'alignement du centre de gravité et du point de suspension
GB2172572A (en) * 1985-03-21 1986-09-24 Pilkington Brothers Plc Improvements in or relating to apparatus for carrying glass sheets

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101318018B1 (ko) 2011-03-31 2013-10-14 ( 주 ) 화신 핑거 프레임 기구
CN102153015A (zh) * 2011-04-15 2011-08-17 张树文 用于长型材吊装自动机械手的吊钩连接装置
WO2019183698A1 (pt) * 2018-03-28 2019-10-03 Cava Antonio Carlos Barberena Mecanismo transportador de bolsas flexíveis
CN109335955A (zh) * 2018-11-21 2019-02-15 彭晓艳 货物吊装架

Also Published As

Publication number Publication date
ES1055957U (es) 2004-02-16
ES1055957Y (es) 2004-06-01

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