GB2077216A - Load handling device - Google Patents
Load handling device Download PDFInfo
- Publication number
- GB2077216A GB2077216A GB8019140A GB8019140A GB2077216A GB 2077216 A GB2077216 A GB 2077216A GB 8019140 A GB8019140 A GB 8019140A GB 8019140 A GB8019140 A GB 8019140A GB 2077216 A GB2077216 A GB 2077216A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- derrick
- main
- handling device
- pivot
- 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.)
- Granted
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
- B60P1/64—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable
- B60P1/6418—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar
- B60P1/6463—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading the load supporting or containing element being readily removable the load-transporting element being a container or similar fitted with articulated beams for longitudinal displacement of the container
Abstract
The invention concerns an improved handling device. The device comprises a derrick 8 provided with a main arm 9 and an auxiliary arm 11. The arm 9, which is telescopic, is pivoted on a sub-frame 6 itself pivoted to the chassis 3 of the vehicle 1. At the front the chassis 3 is provided with a cam 19 having ramps 20 and 21 on which can run a roller 22 placed at the free end of the arm 9. In order to tip, the arm 9 is first contracted, which allows a slight upward swing of this arm when the roller 22 climbs the ramp 20. This appreciably relieves pressure on the tipping jack 15. <IMAGE>
Description
SPECIFICATION
Load handling device
The present invention concerns an improved
handling device mounted on a vehicle to carry out the handling of containers, skips, and any other load liable to be carried by the vehicle, as well as the procedure for its use.
There are already known handling devices
mounted on vehicles which comprise a derrick of which the main telescopic arm is pivoted to the free end of a sub-frame which is itself joined by a transverse pivot to the rear end of the vehicle chassis. The mechanism is controlled by a slide jack allowing the main arm of the derrick to be extended and contracted, and by a tipping jack which is pivoted between the main arm of the derrick and the front of the vehicle chassis to tip the derrick and the sub-frame backwards and forwards. When it is desired to unload a skip or
any other load on the vehicle, the tipping jack is extended and the derrick first swings about the pivot on the sub-frame, and secondly about the
pivot on the chassis.When it is desired to "tip", that is to say empty the skip by inclining it downwards and backwards without unloading it, the main arm of the derrick is latched to the subframe in such a way that the extension of the tipping jack makes the whole assembly
comprising the skip, the derrick and the sub-frame swing around the pivot at the rear of the chassis.
The latching device which secures the main arm of the derrick to the sub-frame is preferably operated automatically by a first movement of the slide jack.
A handling device of this type is, for example, described in the French Patent No. 2,262,747.
One of the disadvantages of such a handling device is that it necessitates the use of a very powerful, and hence very expensive, tipping jack.
In fact, the load to handle is very heavy, for example 20 tonnes, and at the beginning of tipping the tipping jack must provide a great starting force, given that its lever arm is very short on account of the fact that the tipping jack is then almost horizontal, the lever arm being the distance which separates the line of action of the said jack from the axis of swing of the load. In fact, even with an oversize tipping jack, such a device does not allow the utilisation of skips and containers of standard dimensions of more than 20 tonnes in weight.
The invention aims at achieving an improved handling device which will reduce the above disadvantage, and which therefore allows easy handling of even heavier loads.
A handling device according to the invention, mounted on a vehicle, to carry out the handling of loads such as skips and containers comprises: - a sub-frame joined by a first transverse pivot which is closely horizontal at the rear of the vehicle chassis; - a derrick comprising a main telescopic arm of which the base is pivoted to the free end of the sub-frame by means of a second pivot parallel to
the first, and an auxiliary arm provided at its free
end with a hook intended to work in conjunction with an anchor point provided at the front of the
load; - at least one tipping jack pivoted at the rear to the main derrick arm and at the front to the
chassis of the vehicle to control the tipping
movements of the derrick;; - a slide jack which controls the extension and contraction of the main telescopic derrick arm; - a latching system which ensures the locking of the main derrick arm in line with the sub-frame
by means of an extension of the said main arm;
and it is characterised in that the front of the chassis is provided with a ramp intended to work in conjunction with the free end of the main telescopic derrick arm to make the derrick tip slightly upwards from the road position of the device at the beginning of the contraction movement of the said main arm.
According to an additional characteristic of the invention, the first ramp is followed towards the rear by a second ramp due to which the derrick xtips downwards when the contraction of the main telescopic arm continues, the derrick being thus completely lowered when the automatic locking of the latching system takes place.
According to an additional characteristic of the invention, the free end of the main telescopic derrick arm is provided with a bearing roller by means of which this main arm comes into contact with the ramps, the roller running on these ramps.
According to another characteristic of the invention, a movement detector is placed between the two ramps to work in conjunction with the bearing roller of the main telescopic arm when it is located there.
According to an additional characteristic of the invention, a decompression device is connected in the feed circuit of the tipping jack, this device being operated by means of a sensor which is acted upon when the main derrick arm is in the low position, or near to that position.
According to an additional characteristic of the invention, the sensor of the decompression device is fitted to work in conjunction with the pivot spindle connecting the tipping jack to the main derrick arm, the said spindle pushing the control pedal of the sensor slightly forward so long as the main derrick arm is near to its low position.
A procedure for using the handling device according to the invention is characterised in that one proceeds in the following manner in order to carry out a tipping operation: with the handling device initially in the road
position, first the main telescopic derrick arm is contracted by means of the slide jack; this contraction movement is stopped as
soon as the movement detector registers the
presence of the bearing roller between the two
ramps; - the assembly comprising the derrick, the
sub-frame and the load is then tipped by means of
the tipping jack.
A procedure for using the handling device according to the invention is characterised in that one proceeds in the following manner to unload the load: with the handling device intitially in the road position, the telescopic derrick arm is contracted by means of the slide jack in such a way that the bearing roller of the main derrick arm rides up the first ramp, down the second ramp until the latching system is unlocked; - the tipping jack is then operated in such a way as to make the derrick swing successively around the second pivot, then around the first pivot.
The attached drawing, given by way of nonlimiting example, will allow the characteristics of the invention to be better understood.
- Figure 1 is a side view of an improved handling device according to the invention mounted on a vehicle, in the road position.
- Figure 2 is a plan view of the same vehicle.
- Figures 3 and 4 are part views on a larger scale of Figure 1.
- Figure 5 is a side view of the device at the beginning of tipping.
- Figure 6 is a side view of the device during tipping.
- Figure 7 is a side view of the device at the beginning of an operation for unloading the load.
- Figure 8 is a side view of the device during the operation of unloading the load.
In the drawings is shown a vehicle 1 provided with a driving cab 2 and a chassis 3. This vehicle carries two front axles 4 and two rear axles 5. A sub-frame 6 is mounted so as to swing about a pivot 7 located at the rear end of the chassis 3.
The pivot 7, which is closely horizontal, lies transversely in relation to the vehicle. A derrick 8 can pivot in relation to the sub-frame 6. This derrick comprises a main arm 9 of which the base is connected to the free end of the sub-frame 6 by means of a pivot 10 parallel to the pivot 7, and an auxiliary arm 1 1 provided at its free end with a hook 12 intended to work in conjunction with a hooking point 13 provided at the front of the load.
The main arm 9 is telescopic, a jack 14, known as the slide jack, being provided to control the extension and contraction of this main arm. Ajack 1 5, known as the tipping jack, is pivoted at the rear end to the main derrick arm by means of a spindle 16 and, at the front, to the chassis 3 by means of a spindle 17. A latching component 18 is in addition provided to lock the main derrick arm 9 in line with the sub-frame 6. Following a known arrangement, the unlocking of this mechanism takes place automatically when the main derrick arm 9 is completely contracted.
According to an arrangement peculiar to the invention, the front of the chassis 3 is provided with a cam 19 comprising a front ramp 20 sloping forwards and downwards, and a rear ramp 21 sloping backwards and downwards, whilst the free end of the main arm 9 is fitted with a bearing roller 22 by means of which the arm comes into contact with the cam 19, the roller 22 running on the ramps. A movement detector 23 is placed between the ramps 20 and 21 to work in conjunction with the roller 22 when it is located there.
On the other hand, a decompression device connected in the feed circuit of the annular pressure chamber of the tipping jack 1 5 is operated by means of a sensor 24 which is activated when the main derrick arm is in the low position or near to this position. For this purpose the sensor 24 carries a control pedal 25 which the spindle 1 6 pushes slightly forward when the derrick 8 is near to its low position.
To carry out a tipping operation one proceeds in the following manner: with the handling device in the road position shown in Figure 1. the main arm 9 of the derrick 8 is first slightly contracted by means of the slide jack 14. During this phase, the roller 22 rides up the ramp 20 causing a start of upward pivoting around the pivot 7 of the assembly comprising the derrick 8, the sub-frame 6 and the load 26.
- as soon as the movement detector 23 registers the presence of the bearing roller 22 between the two ramps 20 and 21, the contraction of the main arm 9 is stopped (Fig.5).
- the tipping jack 1 5 is extended, making the said movable assembly comprising the derrick 8, the subframe 6 and the load 26 swing en bloc backwards about the pivot 7 (Fig.6).
The initial pivoting of the movable assembly mentioned above is made possible by a decompression of the annular chamber of the tipping jack 1 5 controlled by the sensor 24.
The initial action of the slide jack 14 is of great advantage, for the following two reasons: - on the one hand, given that the load moves backwards, the resisting- lever arm of the load to be pivoted about the pivot 7 is appreciably reduced.
- on the other hand, given that the load is raised by the effect of the ramp 20, the operating lever arm of the tipping jack 15 5 increases even before the tipping jack 1 5 is operated. As can be seen in Fig.5, this lever arm is, in the case of a tipping operation, the distance 27 which separates the line of action 28 of the tipping jack 15 from the axis of the pivot 7.
In order to deposit the load 26 on the ground, one proceeds in the following manner: with the handling device initially in the road position shown in Fig.1, the main arm 9 of the derrick 8 is contracted by means of the slide jack 14. As previously, the roller 22 first rides up the ramp 20, causing an upward pivoting of the movable assembly mentioned above about the pivot 7, but the roller 22 then descends the ramp 21,which allows the said movable assembly to bear once more on the chassis 3.
- after the roller 22 has descended the ramp 21, the main derrick arm 9 reaches the limit of its contraction and causes the automatic unlocking of the latching component 1 8 (Fig.7).
-finally, the tipping jack 15 extends, making the derrick 8 swing successively around the pivot 10, then around the pivot 7.
The swing around the pivot 7 commences when the base of the derrick comes into contact at 29 with the sub-frame 6 (Fig.8).
The setting down of the load 26 on the ground therefore is carried out in an entirely traditional way, the modifications which the present application brings to the handling device changing nothing in the procedure of loading and unloading loads. The line 30 in Fig.7 represents the path followed by the free end of the derrick 8 during the operations of loading and unloading. This path retains the traditional shape except near to the road position where the ramps 20 and 21 cause a hump 31.
Claims (10)
1. A handling device mounted on a vehicle to carry out the handling of loads such as skips and containers, comprising: - a sub-frame pivoted on a first transverse pivot, which is closely horizontal, provided at the rear of the chassis of the vehicle; - a derrick comprising a main telescopic arm of which the base is pivoted to the free end of the sub-frame by means of a second pivot parallel to the first pivot, and an auxiliary arm provided at its free end with a hook intended to work in conjunction with an anchor point provided at the front of the load; - at least one tipping jack pivoted at the rear to the main arm of the derrick, and at the front to the chassis of the vehicle to control the swinging movements of the derrick;; - a slide jack which controls the extension and contraction of the main telescopic arm of the derrick; - a latching system able to ensure the latching of the main derrick arm in line with the sub-frame, the chassis being provided at the front with a cam intended to work in conjunction with the free end of the main telescopic derrick arm to make the derrick swing slightly upwards at the beginning af the contraction travel of the said main arm from the road position of the device.
2. A handling device as claimed in Claim 1, in which the cam comprises a front ramp sloping upwards and backwards, and a rear ramp sloping downwards and backwards, the cam being placed in such a way that the main telescopic arm is situated clear of the cam when it is sufficiently contracted to cause the automatic unlocking of the latching system.
3. A handling device as claimed in Claim 2, in which the free end of the main telescopic derrick arm is provided with a bearing roller by means of which this main arm runs on the ramps of the cam.
4. A handling device as claimed in Claim 3, in which a movement detector is placed between the two ramps to work in conjunction with the bearing roller of the main telescopic arm when it is located there.
5. A handling device as claimed in any one of the preceding claims, in which a decompression device is connected in the feed circuit of the annular chamber of the tipping jack, this decompression device being operated by means of a sensor which is activated when the main derrick arm is in the low position or near to it.
6. A handling device according to Claim 5, in which the sensor of the decompression device is mounted to work in conjunction with the pivot spindle connecting the tipping jack to the main arm, the said spindle pushing a control pedal of the sensor slightly forwards so long as the main derrick arm is near to its low position.
7. A handling device constructed and arranged substantially as herein described, with reference to the accompanying drawings.
8. A method of tipping a load using a handling device as claimed in Claim 4, or Claim 5 or Claim 6 when dependent on Claim 4, or as claimed in
Claim 7, when the handling device is initially in the road position, comprising the following steps: the main telescopic derrick arm is first contracted by means of the slide jack; during this phase the bearing roller of the main derrick arm runs up the front ramp of the cam causing a start of pivoting upwards around the first pivot of the movable assembly which comprises the derrick, the subframe and the load; this contraction movement is stopped as soon as the movement detector senses the presence of the bearing roller between the two ramps; the tipping jack is then extended to make the above-mentioned movable assembly tip en bloc rearwards around the first pivot.
9. A method of unloading a load on to the ground using a handling device as claimed in
Claim 4, or Claim 5 or Claim 6 when dependent on
Claim 4, or as claimed in Claim 7, when the handling device is initially in the road position, comprising the following steps: the main telescopic derrick arm is completely contracted by means of the slide jack; during this phase, the bearing roller of the main derrick arm runs up the front ramp of the cam, then down the rear ramp, thus allowing the movable assembly which comprises the derrick, the sub-frame and the load to descend completely again before the automatic unlocking of the latching system takes place; the tipping jack is then extended in such a way that the derrick swings successively around the first pivot, then around the second pivot.
10. A method of handling a load substantially -as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8019140A GB2077216B (en) | 1980-06-11 | 1980-06-11 | Load handling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8019140A GB2077216B (en) | 1980-06-11 | 1980-06-11 | Load handling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2077216A true GB2077216A (en) | 1981-12-16 |
| GB2077216B GB2077216B (en) | 1983-09-28 |
Family
ID=10513984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8019140A Expired GB2077216B (en) | 1980-06-11 | 1980-06-11 | Load handling device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2077216B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2561184A1 (en) * | 1984-03-13 | 1985-09-20 | Bennes Marrel | Automatic system for locking and unlocking the mechanism for handling a container, especially on a vehicle |
| EP4070991A1 (en) * | 2021-04-09 | 2022-10-12 | Parator Industri AB | A hook-lift trailer and a hook-lift system |
-
1980
- 1980-06-11 GB GB8019140A patent/GB2077216B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2561184A1 (en) * | 1984-03-13 | 1985-09-20 | Bennes Marrel | Automatic system for locking and unlocking the mechanism for handling a container, especially on a vehicle |
| EP4070991A1 (en) * | 2021-04-09 | 2022-10-12 | Parator Industri AB | A hook-lift trailer and a hook-lift system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2077216B (en) | 1983-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4350469A (en) | Handling device mounted on a vehicle to carry out the handling of loads such as skips and containers | |
| US3874537A (en) | Road vehicle of the platform type | |
| US4318657A (en) | Vehicle for loading and transporting heavyweight objects in particular automotive vehicles | |
| US6336783B1 (en) | Advanced rollback wheel-lift | |
| US4456420A (en) | Car carrier having a sliding and tilting platform | |
| US4348054A (en) | Convertible adjustable bed vehicle | |
| CA2075087A1 (en) | Cargo handling apparatus | |
| US2354337A (en) | Loading and unloading apparatus for self-propelled vehicles | |
| US4009791A (en) | Truck dump-body operating mechanism | |
| US3984013A (en) | Roll-on mechanism for loading a container onto a vehicle | |
| US3013684A (en) | Material hoisting and dumping apparatus | |
| US4730974A (en) | Tilt trailer in particular for a road transport vehicle carrier | |
| US7192239B2 (en) | Apparatus for dual stage loading of a container upon a roll-off vehicle | |
| WO1986001469A1 (en) | Equipment for loading a cargo space onto a vehicle and for removing the cargo space off the vehicle | |
| US4051968A (en) | Load handling method and apparatus | |
| US4047698A (en) | Pallet truck automatic lift | |
| US3971486A (en) | Apparatus for handling and transporting containers, load supporting bodies, pallets and the like | |
| GB2077216A (en) | Load handling device | |
| EP0107892B1 (en) | Equipment for loading an exchange platform or a container | |
| US20130243555A1 (en) | Box Lifting Assembly for Dump Trucks or Similar Vehicles | |
| EP0162552A1 (en) | Semi-trailer with raising and lowering facility | |
| US4067464A (en) | Height adjustable refuse compaction and ejection system | |
| US4384816A (en) | Dump truck | |
| WO2001015932A1 (en) | Device for a vehicle for loading a container and for coupling a trailer | |
| JPS64261B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960611 |