EP4201870A1 - Dispositif de positionnement pour positionner des fourches pour un chariot élévateur - Google Patents

Dispositif de positionnement pour positionner des fourches pour un chariot élévateur Download PDF

Info

Publication number: EP4201870A1
Authority: EP; European Patent Office
Prior art keywords: bar; supporting structure; lower bar; unit; liner
Prior art date: 2021-12-23
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.): Granted

Application number

EP22215384.3A

Other languages

German (de)

English (en)

Other versions

EP4201870B1 (fr

Inventor

Matteo ZANELLA

Giovanni Paolo Bonelli

Marco BUZZONI

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.)

LTE Lift Truck Equipment SpA

Original Assignee

LTE Lift Truck Equipment SpA

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.)

2021-12-23

Filing date

2022-12-21

Publication date

2023-06-28

2022-12-21 Application filed by LTE Lift Truck Equipment SpA filed Critical LTE Lift Truck Equipment SpA

2023-06-28 Publication of EP4201870A1 publication Critical patent/EP4201870A1/fr

2025-05-07 Application granted granted Critical

2025-05-07 Publication of EP4201870B1 publication Critical patent/EP4201870B1/fr

Status Active legal-status Critical Current

2042-12-21 Anticipated expiration legal-status Critical

Links

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/12—Platforms; Forks; Other load supporting or gripping members
- B66F9/14—Platforms; Forks; Other load supporting or gripping members laterally movable, e.g. swingable, for slewing or transverse movements
- B66F9/147—Whole unit including fork support moves relative to mast
- B66F9/148—Whole unit including fork support moves sideways

Definitions

This invention relates to a device for positioning forks for a lift truck.
the device for positioning forks according to the invention is of the integrated translating-positioning type, but without thereby limiting the scope of the invention.
a single-acting hydraulic cylinder moves a fork-holder carriage along a horizontal direction, parallel to the longitudinal direction of extension of the carriage.
the carriage performs a lateral translation of the forks, which maintain a fixed position during their translation.
the fork-carrier carriage is a rectangular frame equipped with an upper bar, a lower bar and a pair of side bars which connect the top bar to the lower bar.
the carriage has a window whose frame is defined by the bars which constitute it.
the window defines the field of vision of the driver of the lift truck when the carriage is positioned in a raised position relative to the ground.
the single-acting cylinder which performs the lateral translation of the carriage, in the prior art solutions, is positioned in a zone of the window close to its centre line.
a device for positioning forks for a lift truck comprising a supporting structure configured to support a pair of forks which comprises an upper bar, a lower bar, a first side bar and a second side bar for connecting the upper bar and the lower bar wherein the upper bar and the lower bar have a main longitudinal extension.
the top bar, the lower bar, the first side bar and the second side connecting bar define a viewing window.
the viewing window defined by the bars of the supporting structure of the forks is larger than in prior art solutions, allowing greater visibility for the driver when moving the positioning device.
the numeral 1 denotes a device for positioning forks for a lift truck according to the invention, see Figures 1 to 3 .
the positioning device 1 comprises a supporting structure 2 configured for supporting a pair of forks 3.
the supporting structure 2 comprises an upper bar 4, a lower bar 5, a first side bar 6 and a second side bar 7 for connecting the upper bar 4 and the lower bar 5 wherein the upper bar 4 and the lower bar 5 have a main longitudinal extension.
the upper bar 4, the lower bar 5, the first side bar 6 and the second side bar 7 define a viewing window 8.
the viewing window 8 according to the embodiment illustrated is divided into two parts by a middle bar 39.
the positioning device 1 comprises a movement unit 9 for moving the supporting structure 2 along a horizontal direction D parallel to the longitudinal direction of extension of the upper bar 4 and of the lower bar 5 of the supporting structure 2.
the movement unit 9 is positioned at the lower bar 5.
the viewing window 8 is free from visual obstructions.
the lower bar 5 comprises a seat 10 for housing at least part of the movement unit 9.
the housing seat 10 is configured to house the entire movement unit 9.
the movement unit 9 comprises a liner 11, inserted at least partly in the seat 10 for housing the lower bar 5.
the liner 11 comprises at least one flat top surface 12 configured for the sliding of rolling elements 13 connected to the lower bar 5.
the liner 11 has a flat bottom surface 33, opposite the top surface 12
the liner 11 has at least a first flat side surface 34 and a second flat side surface 35, positioned opposite each other.
the first side surface 34 and the second side surface 35 connect the top surface 12 and the bottom surface 33.
the liner 11 has a polygonal cross-section, in particular square.
the movement unit 9 comprises a first rod 14, connected to the first side bar 6, and a second rod 15, connected to the second side bar 7, positioned on opposite sides of the liner 11.
the liner 11 has a first chamber 37 in which the first rod 14 is partly inserted and a second chamber 38 in which the second rod 15 is partly inserted, as illustrated in Figure 4 .
Each between the first rod 14 and the second rod 15 is movable in the respective first chamber 37 and second chamber 38 from a retracted position to an extended position, and vice versa.
the movement of the first rod 14 and of the second rod 15 from the retracted position to the extended position, and vice versa, is controlled in an alternating fashion.
the movement of the first rod 14 from the retracted position to the extended position allows a translation of the supporting structure 2 in a first direction, for example towards the right of the driver.
the movement of the second rod 15 from the retracted position to the extended position allows a translation of the supporting structure 2 in a second direction, opposite the first direction, for example towards the left of the driver.
the actuation of the first rod 14 or of the second rod 15 is performed by means of a hydraulic system not illustrated.
the positioning device 1 comprises a unit 16 for supporting the supporting structure 2 slidably constrained to it.
the supporting structure 2 is movable relative to the supporting unit 16. During the relative movement between the supporting structure 2 and the supporting unit 16, the rolling elements 13 slide on the top surface 12 of the liner 11.
the liner 11 of the movement unit 9 is connected at least partly to the supporting unit 16.
the liner 11 is connected to the supporting unit 16 at two coupling zones, the coupling zones being preferably positioned symmetrical to each other.
the supporting unit 16 comprises a first bar 27 and a second bar 28 positioned parallel to each other along a vertical direction and a third bar 29, joining the first bar 27 and the second bar 28, positioned along a horizontal direction.
the first bar 27 and the second bar 28 comprise respective rolling elements 30 designed to slide in respective guides of an upright 36 of the lift truck, see Figure 1 .
the third bar 29 comprises a plurality of rolling elements 31 designed to slide in a seat 32 made in the upper bar 4 of the supporting structure 2.
the translation-positioning device comprises anti-friction elements 22 interposed between them.
anti-friction elements 22 are interposed between the liner 11 of the movement unit 9 and the lower bar 5 of the supporting structure 2.
anti-friction elements 22 are interposed between the first side surface 34 of the liner 11 and the lower bar 5 of the supporting structure 2, as shown in Figure 5 .
the antifriction elements 22 are preferably in the form of bronze runners.
the positioning device 1 comprises first means 17 for coupling the supporting structure 2 and the movement unit 9 configured to prevent a relative rotation of the supporting structure 2 with respect to the supporting unit 16.
the relative rotation is understood as rotation about a horizontal axis parallel to the longitudinal direction of extension of the upper bar 4 and of the lower bar 5 of the supporting structure 2.
the first coupling means 17 comprise a male element 19, positioned on the liner 11 of the movement unit 9, and a female element 20, shaped to match the male element 19, connected to the lower bar 5 of the supporting structure 2, as illustrated in Figure 6 .
the male element 19 has a polygonal cross-section, in particular a right-angled trapezium cross-section.
the positioning device 1 comprises second coupling means 18 configured to prevent a relative translation of the supporting structure 2 relative to the supporting unit 16 along a vertical direction.
the second coupling means 18 comprise a plurality of plate-shaped elements 21 interposed between the liner 11 of the movement unit 9 and the lower bar 5.
the plate-shaped elements 21 are interposed between the bottom surface 33 of the liner 11 and the lower bar 5, as shown in Figure 5 .
the plate-shaped elements 21 are connected to the lower bar 5 by fixing means.
the positioning device 1 comprises a first actuator unit 25 and a second actuator unit 26 each configured to move a respective fork 5.
This movement allows the forks 3 to be positioned relative to each other.
the movement is a relative translation along the horizontal direction D parallel to the longitudinal direction of extension of the upper bar 4 and of the lower bar 5 of the supporting structure 2.
a first actuator unit 25 and a second actuator unit 26 comprise a respective single-acting hydraulic cylinder.
the positioning device 1 comprises at least one actuator unit 23 and transmission means 24 of the actuator unit 23 for moving the forks 3 relative to each other.
the actuator unit 23 comprises a single-acting hydraulic cylinder.
the transmission means 24 comprise a transmission chain.

Landscapes

Engineering & Computer Science (AREA)
Transportation (AREA)
Structural Engineering (AREA)
Civil Engineering (AREA)
Life Sciences & Earth Sciences (AREA)
Geology (AREA)
Mechanical Engineering (AREA)
Forklifts And Lifting Vehicles (AREA)

EP22215384.3A 2021-12-23 2022-12-21 Dispositif de positionnement pour positionner des fourches pour un chariot élévateur Active EP4201870B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT102021000032576A IT202100032576A1 (it)	2021-12-23	2021-12-23	Dispositivo posizionatore di forche per carrello elevatore

Publications (2)

Publication Number	Publication Date
EP4201870A1 true EP4201870A1 (fr)	2023-06-28
EP4201870B1 EP4201870B1 (fr)	2025-05-07

Family

ID=80625224

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP22215384.3A Active EP4201870B1 (fr)	2021-12-23	2022-12-21	Dispositif de positionnement pour positionner des fourches pour un chariot élévateur

Country Status (3)

Country	Link
EP (1)	EP4201870B1 (fr)
ES (1)	ES3038724T3 (fr)
IT (1)	IT202100032576A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01174396U (fr) *	1988-05-31	1989-12-12
US5707201A (en) *	1992-06-11	1998-01-13	Rightline Equipment, Inc.	Forklift truck side shifter
US20050186059A1 (en) *	2004-02-25	2005-08-25	Pietro Foroni	Modular assembly for manufacturing structures for support and powered translation of forks in lift trucks

2021
- 2021-12-23 IT IT102021000032576A patent/IT202100032576A1/it unknown
2022
- 2022-12-21 EP EP22215384.3A patent/EP4201870B1/fr active Active
- 2022-12-21 ES ES22215384T patent/ES3038724T3/es active Active

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01174396U (fr) *	1988-05-31	1989-12-12
US5707201A (en) *	1992-06-11	1998-01-13	Rightline Equipment, Inc.	Forklift truck side shifter
US20050186059A1 (en) *	2004-02-25	2005-08-25	Pietro Foroni	Modular assembly for manufacturing structures for support and powered translation of forks in lift trucks

Also Published As

Publication number	Publication date
IT202100032576A1 (it)	2023-06-23
ES3038724T3 (en)	2025-10-15
EP4201870B1 (fr)	2025-05-07

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