WO1989006611A1 - Lifting device in a goods-carrying vehicle - Google Patents

Lifting device in a goods-carrying vehicle Download PDF

Info

Publication number
WO1989006611A1
WO1989006611A1 PCT/SE1989/000007 SE8900007W WO8906611A1 WO 1989006611 A1 WO1989006611 A1 WO 1989006611A1 SE 8900007 W SE8900007 W SE 8900007W WO 8906611 A1 WO8906611 A1 WO 8906611A1
Authority
WO
WIPO (PCT)
Prior art keywords
lifting arm
lifting
load
cylinder assembly
supporting platform
Prior art date
Application number
PCT/SE1989/000007
Other languages
French (fr)
Inventor
Kari Laine
Original Assignee
Lessebo Hydraulik Ab
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 Lessebo Hydraulik Ab filed Critical Lessebo Hydraulik Ab
Publication of WO1989006611A1 publication Critical patent/WO1989006611A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/48—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using pivoted arms raisable above load-transporting element
    • B60P1/483—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading using pivoted arms raisable above load-transporting element using pivoted arms shifting the load-transporting element in a fore or aft direction

Definitions

  • the present invention relates to a lifting device in a goods-carrying vehicle with a load-supporting platform, said device having two lifting arms mounted each on one side of the load-supporting platform and each having a cylinder assembly for pivoting the respect ⁇ ive lifting arm about a transverse first shaft, one of the piston-rod unit and cylinder unit of said cylinder assembly being articulated about a transverse second shaft and the other of said units being articulated to said lifting arm about a transverse third shaft, each lifting arm being pivotable by means of the associated cylinder assembly between a rear lifting position and a front resting position.
  • Such lifting devices which are sometimes called tailgate lifts, are available in many different designs.
  • the prior art lifting devices are used for handling relatively heavy units, such as containers and cable drums.
  • their lifting arms of the prior art lifting devices When the lifting arms of the prior art lifting devices have taken their front resting position which is the lowest position in which the lifting arms are directed forwards, their cylinder assemblies which usually are hydraulic, and their lifting arms are positioned above the vehicle platform or a corresponding load-supporting surface. This is no disadvantage, when the vehicle is used only for transporting containers and the like which are loaded and unloaded from behind by means of a tailgate lift.
  • the object of the present invention is to provide a lifting device which makes it possible to readily load and unload goods both from behind and from the vehicle sides and which thus makes it possible to use the vehicle for transporting different types of goods.
  • this object is achieved by means of a lifting device which is of the type mentioned by way of introduction and which is charac ⁇ terised in that the two pairs of lifting arm and cylinder assembly are mounted each on one side of said load- supporting platform, such that both the lifting arm and the cylinder assembly are positioned below or on a level with said load-supporting platform, when the lifting arm has taken its front resting position, the centre of the third shaft being simultaneously positioned above the straight line connecting the centre of said first shaft with the centre of said second shaft.
  • the lifting device com ⁇ prises two channel elements arranged each on one side of the load-supporting platform and extending therealong, said channel elements having an upwardly open channel and the upper portion of said channel elements being posi ⁇ tioned below or on a level with the load-supporting platform, and the two pairs of lifting arm and cylinder assembly are each mounted on a channel element, such that both the lifting arm and the cylinder assembly are com ⁇ pletely inserted in the channel of the respective channel element, when the lifting arm has taken its front resting position.
  • each lifting arm has a planar surface and is designed such that the planar surface is positioned on a level with the load-supporting platform, when the lifting arm has taken its front resting position.
  • their planar surfaces When the two lifting arms are in their front resting position, their planar surfaces. thus form a lateral continuation of the load-supporting platform, whereby the width of the load-supporting surface is conveniently increased.
  • Each channel element preferably is U-shaped in cross- section, each lifting arm being made of a square tube.
  • FIG. 1 is a side view of a truck provided with a lifting device according to the present invention
  • Fig. 2 is an enlarged partial view and shows the lifting device in more detail
  • Fig. 3 is a perspective view of the truck platform and the lifting device in more detail.
  • the truck 1 shown in Fig. 1 comprises a platform 2 with sideboards 3 and a tailboard 4.
  • the truck 1 is also provided with a lifting device according to the present invention.
  • the lifting device is particularly used for loading and unloading from behind. This is illustrated in Fig. 1 by means of a load which is a container 5.
  • the tailboard 4 is removed when loading and unloading are to be effected by means of the lifting device.
  • the sideboard 3 is lowered on this side.
  • the lifting device On each side of the platform 2, the lifting device comprises a channel element 6 having an upwardly open channel and extending along the platform 2.
  • the channel element 6 is U-shaped in cross-section, and its upper portion is positioned on a level with the top surface of the platform 2.
  • the channel element 6 further com ⁇ prises an extension 6a extending obliquely downward- backward.
  • the sideboards 3 are attached to the channel elements 6 by hinge means 6b.
  • a lifting arm 7 is pivotally mounted in each channel element 6 of the lifting device.
  • the lifting arm 7 consists of a square tube which by means of two rear side members 8 is pivotable about a transverse shaft 9 which is mounted in the rear portion of the channel element 6.
  • Each lifting arm 7 is pivotable about its shaft 9 by means of a pivot mechanism in the form of a hydraulic cylinder assembly 10 which is articulated both to the lifting arm 7 and to the channel element 6.
  • the cylinder 11 of the hydraulic cylinder assembly 10 is articulated about a transverse shaft 12 which is mounted in the front portion of the channel element 6
  • the piston- rod 13 of the hydraulic cylinder assembly 10 is arti ⁇ culated about a transverse shaft 14 which is mounted in a lug 15 on the lower side of the lifting arm 7.
  • the lifting arms 7 are separately pivotable by means of the hydraulic cylinder assemblies 10, between a rear lifting position in which they project backward from the platform 2 as shown by dash-dot lines in Fig.
  • Fig. 1 shows the left lifting arm 7 in its front resting position, and it is evident that in -the resting position, the planar upper surface of the lifting arm 7 is posi ⁇ tioned on a level with the top surface of the platform 2 so as to form a continuation thereof in the lateral direction and thus increase the width of the load- supporting surface. Since both the lifting arm 7 and its hydraulic cylinder assembly 10 are completely inserted in the channel of the channel element 6 , when the lifting arm 7 has taken its front resting position, they form no obstacle that could render loading and unloading of goods from the side difficult.
  • each lifting arm 7 there is arranged a tele- scoping extension arm 16 consisting of a square tube whose outer dimensions correspond to the inner dimensions of the lifting arm 7.
  • the extension arm 16 is reciprocable in the lifting arm 7 by means of a hydraulic cylinder assembly 17, the cylinder 18 of which is connected with the rear portion of the lifting arm 7 and the piston-rod 19 of which is connected with and extends a distance into the extension arm.
  • the free end of the extension arm 16 is provided with a pin 20 for attaching chains 21, as shown in Fig. 1, or for mounting a transverse lifting beam.
  • a support unit 22 is mounted in the rear extension 6a of each channel element 6.
  • the support unit 22 comprises a support leg 23 which has the form of a square tube and is reciprocable in the channel under a plate 24 which is attached between the two side members of the extension 6a, and a support plate 25 which is hingedly mounted on a transverse shaft 26 inside the support leg 23.
  • the support leg 23 is reci ⁇ procable by means of a hydraulic cylinder assembly 27 whose cylinder 28 is articulated about the shaft " . 9 by means of a sleeve 29 and whose piston-rod 30 is articulated about the shaft 26.
  • the support leg 23 is, by means of the hydraulic cylinder assembly 27, movable between an upper transport position (Figs 1 and 2) and a maximally extended support position which is shown by dash-dot lines in Fig. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

A lifting device in a goods-carrying vehicle with a load-supporting platform (2) comprises two lifting arms (7) mounted each on one side of the load-supporting platform and each having a cylinder assembly (10) for pivoting the respective lifting arm about a transverse shaft (9). Each lifting arm (7) is, by means of the associated cylinder assembly (10), pivotable between a rear lifting position and a front resting position. The two pairs of lifting arm (7) and cylinder assembly (10) are mounted each on one side of the load-supporting platform (2), such that both the lifting arm and the cylinder assembly are positioned below or on a level with the load-supporting platform (2), when the lifting arm has taken its front resting position.

Description

LIFTING DEVICE IN A GOODS-CARRYING VEHICLE
The present invention relates to a lifting device in a goods-carrying vehicle with a load-supporting platform, said device having two lifting arms mounted each on one side of the load-supporting platform and each having a cylinder assembly for pivoting the respect¬ ive lifting arm about a transverse first shaft, one of the piston-rod unit and cylinder unit of said cylinder assembly being articulated about a transverse second shaft and the other of said units being articulated to said lifting arm about a transverse third shaft, each lifting arm being pivotable by means of the associated cylinder assembly between a rear lifting position and a front resting position.
Such lifting devices which are sometimes called tailgate lifts, are available in many different designs. The prior art lifting devices are used for handling relatively heavy units, such as containers and cable drums. When the lifting arms of the prior art lifting devices have taken their front resting position which is the lowest position in which the lifting arms are directed forwards, their cylinder assemblies which usually are hydraulic, and their lifting arms are positioned above the vehicle platform or a corresponding load-supporting surface. This is no disadvantage, when the vehicle is used only for transporting containers and the like which are loaded and unloaded from behind by means of a tailgate lift. If one wants to use the vehicle also for transporting goods which are loaded and unloaded from the vehicle sides, for example by means of a fork truck, the lifting arms and the cylinder assemblies are, however, an obstacle which renders such loading and unloading significantly more difficult and in some cases even makes it impossible to perform these operations. The object of the present invention is to provide a lifting device which makes it possible to readily load and unload goods both from behind and from the vehicle sides and which thus makes it possible to use the vehicle for transporting different types of goods. According to the invention, this object is achieved by means of a lifting device which is of the type mentioned by way of introduction and which is charac¬ terised in that the two pairs of lifting arm and cylinder assembly are mounted each on one side of said load- supporting platform, such that both the lifting arm and the cylinder assembly are positioned below or on a level with said load-supporting platform, when the lifting arm has taken its front resting position, the centre of the third shaft being simultaneously positioned above the straight line connecting the centre of said first shaft with the centre of said second shaft.
In a preferred embodiment, the lifting device com¬ prises two channel elements arranged each on one side of the load-supporting platform and extending therealong, said channel elements having an upwardly open channel and the upper portion of said channel elements being posi¬ tioned below or on a level with the load-supporting platform, and the two pairs of lifting arm and cylinder assembly are each mounted on a channel element, such that both the lifting arm and the cylinder assembly are com¬ pletely inserted in the channel of the respective channel element, when the lifting arm has taken its front resting position.
In a preferred embodiment, each lifting arm has a planar surface and is designed such that the planar surface is positioned on a level with the load-supporting platform, when the lifting arm has taken its front resting position. When the two lifting arms are in their front resting position, their planar surfaces. thus form a lateral continuation of the load-supporting platform, whereby the width of the load-supporting surface is conveniently increased. Each channel element preferably is U-shaped in cross- section, each lifting arm being made of a square tube.
The invention will now be described in greater detail with reference to the accompanying drawings in which: Fig. 1 is a side view of a truck provided with a lifting device according to the present invention;
Fig. 2 is an enlarged partial view and shows the lifting device in more detail; and
Fig. 3 is a perspective view of the truck platform and the lifting device in more detail.
The truck 1 shown in Fig. 1 comprises a platform 2 with sideboards 3 and a tailboard 4. The truck 1 is also provided with a lifting device according to the present invention. The lifting device is particularly used for loading and unloading from behind. This is illustrated in Fig. 1 by means of a load which is a container 5. The tailboard 4 is removed when loading and unloading are to be effected by means of the lifting device. When loading and unloading are to be carried out from one side, for example by means of a fork truck, the sideboard 3 is lowered on this side.
On each side of the platform 2, the lifting device comprises a channel element 6 having an upwardly open channel and extending along the platform 2. The channel element 6 is U-shaped in cross-section, and its upper portion is positioned on a level with the top surface of the platform 2. The channel element 6 further com¬ prises an extension 6a extending obliquely downward- backward. The sideboards 3 are attached to the channel elements 6 by hinge means 6b.
In each channel element 6 of the lifting device, a lifting arm 7 is pivotally mounted. The lifting arm 7 consists of a square tube which by means of two rear side members 8 is pivotable about a transverse shaft 9 which is mounted in the rear portion of the channel element 6.
Each lifting arm 7 is pivotable about its shaft 9 by means of a pivot mechanism in the form of a hydraulic cylinder assembly 10 which is articulated both to the lifting arm 7 and to the channel element 6. The cylinder 11 of the hydraulic cylinder assembly 10 is articulated about a transverse shaft 12 which is mounted in the front portion of the channel element 6 , and the piston- rod 13 of the hydraulic cylinder assembly 10 is arti¬ culated about a transverse shaft 14 which is mounted in a lug 15 on the lower side of the lifting arm 7. The lifting arms 7 are separately pivotable by means of the hydraulic cylinder assemblies 10, between a rear lifting position in which they project backward from the platform 2 as shown by dash-dot lines in Fig. 1, and a front resting position in which they extend forward along the platform 2 and are, together with the hydraulic cylinder assemblies 10, completely inserted in the channels of the channel elements 6 as shown in Fig. 2. Fig. 3 shows the left lifting arm 7 in its front resting position, and it is evident that in -the resting position, the planar upper surface of the lifting arm 7 is posi¬ tioned on a level with the top surface of the platform 2 so as to form a continuation thereof in the lateral direction and thus increase the width of the load- supporting surface. Since both the lifting arm 7 and its hydraulic cylinder assembly 10 are completely inserted in the channel of the channel element 6 , when the lifting arm 7 has taken its front resting position, they form no obstacle that could render loading and unloading of goods from the side difficult. When the lifting arm 7 has taken its front resting position, the centre of the shaft 14 is, as shown in Fig. 2, positioned above the straight line connecting the centre of the shaft 12 with the centre of the shaft 9. In each lifting arm 7, there is arranged a tele- scoping extension arm 16 consisting of a square tube whose outer dimensions correspond to the inner dimensions of the lifting arm 7. The extension arm 16 is reciprocable in the lifting arm 7 by means of a hydraulic cylinder assembly 17, the cylinder 18 of which is connected with the rear portion of the lifting arm 7 and the piston-rod 19 of which is connected with and extends a distance into the extension arm. The free end of the extension arm 16 is provided with a pin 20 for attaching chains 21, as shown in Fig. 1, or for mounting a transverse lifting beam.
A support unit 22 is mounted in the rear extension 6a of each channel element 6. The support unit 22 comprises a support leg 23 which has the form of a square tube and is reciprocable in the channel under a plate 24 which is attached between the two side members of the extension 6a, and a support plate 25 which is hingedly mounted on a transverse shaft 26 inside the support leg 23. The support leg 23 is reci¬ procable by means of a hydraulic cylinder assembly 27 whose cylinder 28 is articulated about the shaft " . 9 by means of a sleeve 29 and whose piston-rod 30 is articulated about the shaft 26. The support leg 23 is, by means of the hydraulic cylinder assembly 27, movable between an upper transport position (Figs 1 and 2) and a maximally extended support position which is shown by dash-dot lines in Fig. 2.

Claims

1. A lifting device in a goods-carrying vehicle ( 1 ) with a load-supporting platform (2), said device having two lifting arms (7) mounted each on one side of the load-supporting platform and each having a cylinder assembly (10) for pivoting the respective lifting arm about a transverse first shaft (9), one of the piston-rod unit (13) and the cylinder unit (11) of said cylinder assembly (10) being articulated about a transverse second shaft (12) and the other of said units being articulated to said lifting arm (7) about a transverse third shaft (14), each lifting arm (17) being pivotable by means of the associated cylinder assembly (10) between a rear lifting position and a front resting position, c h a r a c t e r i s e d in that the two pairs of lifting arm (7) and cylinder assembly (10) are mounted each on one side of said load-supporting platform (2), such that both the lifting arm and the cylinder assembly are positioned below or on a level with said load-supporting platform (2), when the lifting arm has taken its front resting position, the centre of said third shaft (14) being simultaneously positioned above the straight line connecting the centre of said first shaft (9) with the centre of said second shaft (12).
2. The lifting device as claimed in claim 1, c h a r a c t e r i s e d in that it comprises two channel elements (6) arranged each on one side of the load-supporting platform (2) and extending therealong, said channel elements having an upwardly open channel and the upper portion of the channel element being positioned below or on a level with the load-supporting platform (2), and that the two pairs of lifting arm (7) and .cylinder assembly (10) are each mounted on a channel element (6), such that both the lifting arm and the cylinder assembly are completely inserted in the channel of the respective channel element (6), when the lifting arm has taken its front resting position.
3. The lifting device as claimed in claim 1 or 2, c h a r a c t e r i s e d in that each lifting arm (7) has a planar surface and is designed such that the planar surface is positioned on a level with said load-supporting platform (2), when the lifting arm (7) has taken its front resting position.
4. The lifting device as claimed in claim 2 or 3, c h a r a c t e r i s e d in that each channel element (6) is U-shaped in cross-section, and that each lifting arm (7) is made of a square tube.
PCT/SE1989/000007 1988-01-18 1989-01-12 Lifting device in a goods-carrying vehicle WO1989006611A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8800129A SE459855B (en) 1988-01-18 1988-01-18 LIFTING DEVICE IN A CAR
SE8800129-2 1988-01-18

Publications (1)

Publication Number Publication Date
WO1989006611A1 true WO1989006611A1 (en) 1989-07-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1989/000007 WO1989006611A1 (en) 1988-01-18 1989-01-12 Lifting device in a goods-carrying vehicle

Country Status (3)

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AU (1) AU2923789A (en)
SE (1) SE459855B (en)
WO (1) WO1989006611A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021075A1 (en) * 1994-02-04 1995-08-10 Ove Hammarstrand Hoisting arrangement
WO1996006753A1 (en) * 1994-08-30 1996-03-07 Gergen Hans Georg Device for transporting interchangeable containers
WO1998057831A1 (en) * 1997-06-15 1998-12-23 Maschinenbau Kirow Leipzig Rail & Port Ag Rear support for a heavy goods vehicle with an automatic loading device
WO1999035005A1 (en) * 1998-01-07 1999-07-15 Multilift Oy Apparatus for handling a container
EP1236612A3 (en) * 2001-03-03 2002-12-18 F. Weyhausen GmbH & Co. KG, Maschinenfabrik Exchanging device for interchangeable container
FR2833900A1 (en) * 2001-12-21 2003-06-27 Pierre Amiand Trailer chassis comprises load bearing structure delimiting reception surface for container and two cranes, one in rear of reception surface
EP1481842A1 (en) * 2003-05-26 2004-12-01 Ernst Wirz AG Transport vehicle with loading platform and pivotable and liftable arms, including loading platform unit, method for loading and transportation system for carrying out of the method
EP1833701A1 (en) * 2004-12-23 2007-09-19 Container Transhandler Pty. Ltd. Container loading apparatus
US7713019B2 (en) * 2007-06-20 2010-05-11 Larry Alexander Flat-bed truck with crane, lift or hoist

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE318981B (en) * 1968-04-09 1969-12-22 Beltrami Spa
SE357179B (en) * 1971-08-18 1973-06-18 Gluecksman Ab A
GB1455267A (en) * 1973-11-08 1976-11-10 Reynolds Boughton Ltd Load-carrying vehicles
EP0030074A1 (en) * 1979-10-16 1981-06-10 Henred Fruehauf Trailers (Pty) Limited Folding freight carrier

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE318981B (en) * 1968-04-09 1969-12-22 Beltrami Spa
SE357179B (en) * 1971-08-18 1973-06-18 Gluecksman Ab A
GB1455267A (en) * 1973-11-08 1976-11-10 Reynolds Boughton Ltd Load-carrying vehicles
EP0030074A1 (en) * 1979-10-16 1981-06-10 Henred Fruehauf Trailers (Pty) Limited Folding freight carrier

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995021075A1 (en) * 1994-02-04 1995-08-10 Ove Hammarstrand Hoisting arrangement
WO1996006753A1 (en) * 1994-08-30 1996-03-07 Gergen Hans Georg Device for transporting interchangeable containers
WO1998057831A1 (en) * 1997-06-15 1998-12-23 Maschinenbau Kirow Leipzig Rail & Port Ag Rear support for a heavy goods vehicle with an automatic loading device
WO1999035005A1 (en) * 1998-01-07 1999-07-15 Multilift Oy Apparatus for handling a container
AU746376B2 (en) * 1998-01-07 2002-04-18 Multilift Oy Apparatus for handling a container
EP1236612A3 (en) * 2001-03-03 2002-12-18 F. Weyhausen GmbH & Co. KG, Maschinenfabrik Exchanging device for interchangeable container
FR2833900A1 (en) * 2001-12-21 2003-06-27 Pierre Amiand Trailer chassis comprises load bearing structure delimiting reception surface for container and two cranes, one in rear of reception surface
EP1481842A1 (en) * 2003-05-26 2004-12-01 Ernst Wirz AG Transport vehicle with loading platform and pivotable and liftable arms, including loading platform unit, method for loading and transportation system for carrying out of the method
EP1833701A1 (en) * 2004-12-23 2007-09-19 Container Transhandler Pty. Ltd. Container loading apparatus
EP1833701A4 (en) * 2004-12-23 2008-01-23 Container Transhandler Pty Ltd Container loading apparatus
US7942621B2 (en) 2004-12-23 2011-05-17 Container Transhandler Pty Ltd Container loading apparatus
US7713019B2 (en) * 2007-06-20 2010-05-11 Larry Alexander Flat-bed truck with crane, lift or hoist

Also Published As

Publication number Publication date
SE459855B (en) 1989-08-14
AU2923789A (en) 1989-08-11
SE8800129L (en) 1989-07-19
SE8800129D0 (en) 1988-01-18

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