(19) |
 |
|
(11) |
EP 2 133 288 B1 |
(12) |
EUROPEAN PATENT SPECIFICATION |
(45) |
Mention of the grant of the patent: |
|
16.08.2017 Bulletin 2017/33 |
(22) |
Date of filing: 08.06.2009 |
|
(51) |
International Patent Classification (IPC):
|
|
(54) |
Lifting mechanism for a loading system for emptying containers
Hubmechanik für eine Ladevorrichtung zum Entleeren von Behältern
Mécanisme de levage d'un dispositif de chargement pour vider des récipients
|
(84) |
Designated Contracting States: |
|
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO
PL PT RO SE SI SK TR |
(30) |
Priority: |
10.06.2008 NL 1035561
|
(43) |
Date of publication of application: |
|
16.12.2009 Bulletin 2009/51 |
(73) |
Proprietor: Terberg Machines B.V. |
|
3403 NL Ijsselstein (NL) |
|
(72) |
Inventor: |
|
- Versteeg, Jan Paul
6708 RV, Wageningen (NL)
|
(74) |
Representative: Verdijck, Gerardus et al |
|
Arnold & Siedsma
Bezuidenhoutseweg 57 2594 AC The Hague 2594 AC The Hague (NL) |
(56) |
References cited: :
DE-A1- 3 809 134 FR-A- 2 528 810 GB-A- 1 545 555
|
DE-A1- 10 221 371 GB-A- 1 334 213
|
|
|
|
|
|
|
|
|
Note: Within nine months from the publication of the mention of the grant of the European
patent, any person may give notice to the European Patent Office of opposition to
the European patent
granted. Notice of opposition shall be filed in a written reasoned statement. It shall
not be deemed to
have been filed until the opposition fee has been paid. (Art. 99(1) European Patent
Convention).
|
[0001] The present invention relates to a loading system for emptying containers according
to the preamble of claim 1. There are many types and dimensions of containers. The
loading system according to the invention is particularly suitable for containers
with a volume varying from 70 to about 1,700 litres.
[0002] Containers such as refuse bins are usually emptied at the user location using a refuse
truck. Such refuse trucks are provided at the rear with a loading system. This loading
system comprises a lifting mechanism for engaging a container and picking up and rotating
this container such that it is emptied into the refuse truck. The engaging mechanism
of such a lifting mechanism can be provided with a comb or toothed edge which engages
under an edge of the container. This edge is clamped on the other side by a plate.
The lifting movement is realized by making use of cylinders. These cylinders are mounted
at a first outer end on an additional lifting frame and at a second outer end on a
lifting arm. A certain overall depth is required for the lifting mechanism with the
additional lifting frame. This depth lengthens the refuse truck or reduces the loading
capacity thereof. Since the lifting mechanism is situated at the rear of a refuse
truck, i.e. behind the rear(most) axle thereof, the pressure on the front axle of
the refuse truck is reduced due to the lifting mechanism. This front axle hereby tends
to move upward such that in an extreme case the wheels of a refuse truck can leave
the ground. The result hereof is that the loading capacity of a refuse truck is limited
in order to prevent this. This therefore reduces the loading capacity of the refuse
truck.
[0003] FR 2 528 810 discloses a loading system of a refuse truck according to the preamble of claim 1.
[0004] The present invention has for its object to provide a loading system with which goods
such as refuse can be collected in a more efficient manner.
[0005] This object is achieved with a loading system for emptying containers according to
claim 1.
[0006] By providing the cylinders directly on or close to the uprights of the loading system
it is possible to substantially dispense with an additional lifting frame on which
these cylinders have to be mounted. By dispensing with this frame the mass of the
overall lifting mechanism, and thereby the whole loading system, is reduced. This
achieves that a greater loading capacity of the refuse truck is realized. By reducing
the mass behind the rearmost axle of a refuse truck as a result of dispensing with
this frame, more load can instead be placed in the space behind this axle without
the pressure on the front axle of the refuse truck falling below the limit value.
In addition, placing of the cylinders preferably directly on or at least in the immediate
vicinity of the uprights of the loading system achieves that the lifting shaft extends
over substantially the whole width of the loading system. This is realized in that
the uprights of the loading system are placed substantially in the line of the sides
of a refuse truck. A loading system is hereby provided over the whole width of the
refuse truck. Through placing of the cylinders on the uprights of the loading system,
which are thus situated substantially in line with the side of the refuse truck, the
lifting shaft can extend over substantially the whole width of the refuse truck. This
achieves that a maximum opening is obtained in which containers can be emptied using
the lifting mechanism. By dispensing with the additional lifting frame, the opening
for emptying of the containers is greater in vertical direction. One significance
hereof is that the containers have to be lifted less high with the lifting mechanism.
Refuse bags can also be placed more easily in the opening since they need lifting
or throwing less high in order to be deposited in the refuse truck. Such refuse bags
have to be thrown less far owing to the smaller overall depth which is realized by
the lifting mechanism. A container for emptying is tilted inward at a comparatively
high position relative to other known mechanisms. The enlarged loading opening is
hereby utilized optimally. According to the invention the at least two cylinders are
operatively connected to a pressure-relief valve with which the lifting mechanism
can be placed a greater distance from a ground surface for the purpose of protection
thereof in the case of obstacles and/or a road surface.
[0007] Owing to the provision of this pressure relief valve, the cylinders can be moved
such that a great distance can be realized between these cylinders and the ground
surface. This is realized in that, in the case an obstacle exerts a determined force,
the hydraulic pressure in the cylinders will rise. The pressure-relief valve is then
opened so that the lifting mechanism moves upward without damage occurring to the
system. This is particularly advantageous in the case obstacles such as a kerb or
speed bumps are provided on or in the ground surface. Damage to the cylinders and
the mechanism can hereby be prevented or reduced. In addition, this also reduces the
risk of something or someone being caught between the lifting mechanism with the cylinders
and the ground surface. The use of the pressure-relief valve increases the safety
of the mechanism and also reduces maintenance costs resulting from damage. In a preferred
embodiment according to the present invention the at least two cylinders are operatively
connected in a master-slave configuration for the purpose of preventing torsional
forces.
[0008] By providing the cylinders preferably directly on an upright, or at least in the
vicinity thereof, of the loading system a greater moment effect will be exerted on
the lifting mechanism during lifting of a container compared to a known loading system
in which the cylinder is situated very closely to the container for lifting and is
mounted on the lifting frame. The lifting shaft is therefore under relatively great
strain of torsion and of bending. Providing the cylinders in a master-slave configuration
prevents the lifting shaft as it were becoming asymmetrically suspended and the container
for emptying not remaining sufficiently horizontal. This achieves that the lifting
mechanism does not need to be given an unnecessarily stiff form. One of the advantages
of such a master-slave configuration is that the lifting shaft can be given a relatively
light form. This reduction in weight can then be utilized for a greater loading capacity
as described above. By connecting the hydraulic drive cylinders in series in a master-slave
configuration, and herein selecting the volume dimensions such that the desired ratio
is achieved, the cylinders move substantially synchronously. This prevents the lifting
shaft and/or the lifting mechanism twisting and/or bending. Compared to other systems,
such as hydraulic synchronizing valves or electronic synchronizing controls, the master-slave
configuration has the advantage that it can be embodied more cheaply and is less susceptible
to malfunction. It is additionally the case that during performing of a lifting movement
the outer end of the cylinders will be fully extended, whereby both cylinders, for
instance in the case of a leakage or fouling, can be placed in synchronized position
(reset) in the unlikely event a deviation occurs.
[0009] For safety purposes one or more springs are preferably provided on or close to the
lifting shaft in order to protect the lifting mechanism. While the lifting mechanism
tilts or rotates a container, this latter exerts a force on, among other parts, the
lifting shaft. Partly depending on the mass in such a container, this load may be
not inconsiderable. The springs are therefore provided to damp this peak load. Other
spring members and/or damping members can be provided instead of these springs.
[0010] A cover or refuse slide-off plate rotatable relative to the engaging mechanism is
preferably also provided for the purpose of covering the engaging mechanism. This
cover is rotatable and covers the comb or teeth of the engaging mechanism. This increases
the safety of the lifting mechanism. An additional advantage hereby is that, when
refuse bags are for instance being placed in the refuse truck, they cannot hook behind
a comb. This prevents the possibility of these bags tearing and the content thereof
ending up in the wrong place. It is also a possibility to provide the cylinders with
a length measuring system for the purpose of determining the position of the lifting
mechanism. This increases the controllability of the whole lifting mechanism, which
further enhances the safety of the system.
[0011] In an advantageous preferred embodiment according to the present invention the loading
system is provided with a weighing system for weighing a container to be emptied.
[0012] Providing a weighing system achieves that the content of an individual container
can be measured. The overall load on the system can for instance hereby be monitored.
It is also possible to track how much a user discards by means of the container. Such
a container can be provided for this purpose with an identification, for instance
in the form of an RFID chip, which is read during the operation. This weighing system
can be used manually, semi-automatically or fully automatically. This is also the
case for the loading system itself.
[0013] In a further preferred embodiment according to the present invention the loading
system comprises a guide for opening a lid of a container.
[0014] By providing the loading system with a guide at the correct position a lid of a container
to be emptied can be opened in automatic manner. This is important in the case of,
among others, so-called EN-840 type containers. This reduces the manual operations
which have to be performed, whereby the containers can be emptied in more efficient
manner.
[0015] In a further advantageous preferred embodiment according to the present invention
a loading system comprises a stop member for stopping a container during emptying
thereof.
[0016] Placing a stop member in the form of a rod in width direction in the loading opening
of for instance the refuse truck prevents the container being as it were catapulted
into the interior of for instance the refuse truck during the lifting movement, and
particularly the rotation of the container during this movement. This catapulting
movement of the container causes damage to the interior of for instance the refuse
truck. The stop member will in that case stop the container for emptying and prevents
the container disappearing, with its possible content, into for instance the refuse
truck.
[0017] The invention also relates to a refuse truck provided with a loading system as described
above according to claim 8, and to a method for emptying a container according to
claim 9.
[0018] Further advantages, features and details of the invention are elucidated on the basis
of preferred embodiments thereof, wherein reference is made to the accompanying drawings,
in which:
- Figure 1 shows a rear view of a refuse truck with loading system according to the
invention;
- Figure 2 shows a view of the loading system of figure 1;
- Figure 3 shows a detail of the outer end of the lifting shaft;
- Figure 4 shows a view of the mounting of the clamping plate on the lifting shaft;
- Figure 5 shows a detail of figure 4 without resilient elements;
- Figure 6 shows of view of the engaging mechanism;
- Figures 7A and B show tilting of a container in the loading system of figure 1; and
- Figure 8 shows a schematic representation of the coacting cylinders for the lifting
arms.
[0019] A refuse collection truck 2 (figure 1) provided with a loading system 4 is used to
empty containers 6. Containers 6 are, among others, containers of the type EN 840-1,
-2, -3 and -4 with respective volumes of 80-360 litres, 500-1200 litres, 770, 1100
and 1300 litres, and 750-1700 litres. In addition, it is also possible using loading
system 4 to place refuse bags in refuse truck 2. Refuse truck 2 is provided for this
purpose with a large loading opening 8. This loading opening 8 is bounded on the sides
by side walls 10 of refuse truck 2. Loading system 4 is provided for this purpose
with the same width as refuse truck 2, whereby uprights 12 of loading system 4 are
situated substantially in line with side wall 10 of refuse truck 2. Mounted on uprights
12 are lifting arms 14 with which engaging mechanism 16 can be moved for the purpose
of lifting a container 6. When a container 6 is emptied, engaging mechanism 16 makes
a pivoting movement with lifting shaft 18, wherein container 6 is carried upside down
into loading opening 8. Refuse truck 2 is provided with two footboards 20 on which
for instance a dustman can take up position during movement of refuse truck 2. Refuse
truck 2 is also provided with two rubber buffers or cushions 22 on which a container
6 rests during the pivoting movement. These cushions 22, with the plate on which they
are mounted, are also embodied such that they can yield to some extent when they come
into contact with obstacles on ground surface 24. Loading system 4 is also provided
with two guides 26 attached to the top part of loading system 4. The lid of a container
can be pushed open with these guides 26 during the pivoting movement such that the
content of container 6 disappears into loading opening 8. Likewise arranged on the
top part of loading system 4 is a stop member 28, substantially along the whole width
of the loading opening 8. This stop member 28 prevents container 6 continuing to rotate
during the pivoting movement. In the case of such a continued rotation container 6
would, without stop member 28, disappear completely into loading opening 8, and thereby
into the interior of refuse truck 2.
[0020] Engaging mechanism 16 (figure 2) engages using a comb 30 under the edge of container
6. During lifting of container 6 with comb 30 the clamping plate or enclosing plate
32 closes, whereby the container edge is clamped between comb 30 and clamping plate
32. Container 6 cannot detach from comb 32 due to clamping plate 32. Lifting shaft
18 extends along the whole width of loading opening 8, and therefore over the whole
width of refuse truck 2. Lifting shaft 18 is connected at an outer end to an outer
end 34 (figure 3) of lifting arm 14. Lifting shaft 18 is provided at the outer end
with an end stop 36. Clamping plate 32 is mechanically connected close to a first
outer end with two fixing brackets 38 (figure 4) to lifting shaft 18. Situated in
this bracket 38 is a spring or resilient element 40 so that shocks can be partially
absorbed without the whole lifting shaft 18 having to be unnecessarily heavily loaded.
The resilient elements 40 ensure that container 6 and loading system 4 are not damaged
if an obstacle, such as wood, refuse etc., comes between them. Resilient elements
40 also make it possible for container 6 to be shaken without the container edge being
unnecessarily heavily loaded. Container 6 herein continues to rotate in the tilting
movement and is braked by the resilient action of resilient elements 40. Lifting shaft
18 is provided with a number of contact surfaces 42 (figure 5) to which resilient
elements 40 are connected. Lifting arm 14 (figure 2) is mounted at a first outer end
on upright 12 via shaft 44. Lifting shaft 18 is mounted on the other outer end of
lifting arm 14. The pivoting movement of lifting arm 14 is realized using a first
cylinder 46. Cylinder 46 is mounted at one outer end for rotation around shaft 48
and connected on the other extendable part to lifting arm 14 via shaft 50. When first
cylinder 46 is extended lifting arm 14 will make a pivoting movement, whereby it is
possible to empty a container 6. Provided on the other side of loading system 4 is
a second cylinder 52 which is mounted in the same manner on lifting arm 14 on this
side of loading system 4.
[0021] Engaging mechanism 16 (figure 6) has a cover or refuse slide-off plate 54 which in
a rest position lies over clamping plate 32 and comb 30 such that these are covered.
This increases safety. It is likewise possible to place refuse bags in loading opening
8 of refuse truck 2 when cover 54 is closed. Mechanism 56 controls the relative movements
of comb 30 and clamping plate 32 in a per se known manner. This relative movement
between comb 30 and clamping plate 32 (figures 7A and 7B) takes place during the pivoting
movement of container 6.
[0022] The configuration of first cylinder 46 and second cylinder 52 (figure 8) is shown
schematically. These cylinders 46, 52 are not placed at the location of the greatest
load resulting from the pivoting movement with containers 6. Cylinders 46, 52 are
on the contrary placed at the outer end of lifting shaft 18, substantially in line
with side wall 10 of refuse truck 2. Although the lifting shaft is in principle under
greater strain of torsion and bending as a result, the hydraulic drive cylinders 46,
52 are connected in series. By correctly selecting the volume dimensions of cylinders
46, 52 in known manner cylinders 46, 52 always move synchronously. Torsion of the
frame, and bending thereof, are hereby prevented. Using this relatively inexpensive
configuration a robust system is obtained compared to known drive systems for loading
systems 4 of refuse trucks 2. Using the master-slave configuration with first cylinder
46 as master and second cylinder 52 as slave, the movement of these cylinders 46,
52 are controlled using valve 58. The hydraulic fluid is transported through conduits
60 to and from cylinders 46, 52 by means of this valve 58. The desired pivoting movement
of loading system 4 can hereby be realized in synchronous manner. Valve 58 can be
operated manually as well as electrically via a central control. First cylinder 46
is also provided with a valve 62. Second cylinder 52 is also provided with a valve
64. Valves 62, 64 are operated mechanically when cylinders are fully retracted or
extended. In the unlikely event of a synchronization difference a correction can be
made by means of valves 62, 64. By means of pressure-relief valve 66 the loading system
4 can move upward as soon as it makes contact with an obstacle in ground surface 24
in order to prevent damage to loading system 4. Valve 66 limits the downward force
of the lifting mechanism. Valve 68 limits the lifting force and can be operated electrically
by a central control. Hydraulic pump 70 is mounted on refuse truck 2. The oil is in
communication with a central reservoir 72 mounted on refuse truck 2. The shut-off
valve 74 ensures that the mechanism does not descend in the case of insufficient pump
pressure, and also serves as safety in the case of a broken conduit.
[0023] The present invention is by no means limited to the above described preferred embodiment.
The rights sought are defined by the following claims, within the scope of which many
modifications can be envisaged.
1. Loading system (4) for emptying containers (6), the loading system (4) comprising
uprights (12) and a lifting mechanism that further comprises:
- two lifting arms (14) mounted on the uprights (12);
- a lifting shaft (18) mounted between the two lifting arms (14) and extending over
substantially the whole width of the loading system (4);
- an engaging mechanism (16) attached to the lifting shaft (18) for picking up a container
(6); and
- at least two cylinders (46, 52) placed on or close to the uprights (12) for moving
the lifting arms (14), characterized in that the at least two cylinders (46, 52) are operatively connected to a pressure-relief
valve (66), wherein in case an obstacle exerts a determined force on the lifting mechanism
such that the pressure in the at least two cylinders (46, 52) rises, the pressure-relief
valve (66) opens so that the lifting mechanism moves upward and is placed a greater
distance from a ground surface to protect the lifting mechanism.
2. Loading system (4) as claimed in claim 1, wherein the at least two cylinders (46,
52) are operatively connected in a master-slave configuration.
3. Loading system (4) as claimed in claim 1 or 2, further comprising a clamping plate
(32) connected with brackets (38) to the lifting shaft (18) for clamping an edge of
the container (6) onto the engaging mechanism (16), wherein the brackets (38) are
provided with one or more springs (40) to partially absorb shocks.
4. Loading system (4) as claimed in one or more of the claims 1-3, wherein a cover (54)
rotatable relative to the engaging mechanism (16) is provided on the lifting shaft
(18) for covering the engaging mechanism (16).
5. Loading system (4) as claimed in one or more of the foregoing claims, further comprising
a weighing system for weighing a container (6) to be emptied.
6. Loading system (4) as claimed in one or more of the foregoing claims, further comprising
a guide (26) attached to a top part of the loading system (4) such that during the
pivoting movement of the container (6), wherein the container (6) is carried upside
down for emptying, a lid of the container (6) is pushed open by the guide (26).
7. Loading system (4) as claimed in one or more of the foregoing claims, further comprising
a stop member (28) attached to a top part of the loading system (4), such that during
the pivoting movement of the container (6), wherein the container (6) is carried upside
down for emptying, the stop member (28) prevents the container (6) continuing to rotate.
8. Refuse truck (2) provided with a loading system (4) as claimed in one or more of the
foregoing claims.
9. Method for emptying a container (6), comprising of:
- providing a refuse truck (2) with a loading system (4) as claimed in claim 8;
- engaging a container (6) to be emptied using the loading system (4);
- emptying the container (6) with the loading system (4); and
- setting down the emptied container (6).
10. Method according to claim 9, further comprising the steps of :
- opening the pressure-relief valve (66) in case an obstacle exerts a determined force
on the lifting mechanism and pressure in the at least two cylinders (46, 52) rises;
and
- moving the lifting mechanism upward.
1. Lade-System (4) zum Leeren von Behältern (6), wobei das Lade-System (4) Träger (12)
und einen Hebemechanismus umfasst, der ferner umfasst:
- zwei Hebearme (14), welche an den Stützen (12) montiert sind;
- einen Hebewelle(18), die zwischen den beiden Hebearmen (14) montiert ist und sich
im Wesentlichen über die gesamte Breite des Lade-Systems (4) erstreckt;
- einen Aufnahme-Mechanismus (16), der an der Hebewelle (18) angebracht ist, um einen
Behälter (6) aufzunehmen; und
- mindestens zwei Zylinder (46, 52), die an oder nahe den Trägern (12) platziert sind,
um die Hebearme (14) zu bewegen,
dadurch gekennzeichnet, dass die mindestens zwei Zylinder (46, 52) betriebsfähig mit einem Druck-Entlastungs-Ventil
(66) verbunden sind, wobei, wenn ein Hindernis eine bestimmte Kraft auf den Hebemechanismus
ausübt, sodass der Druck in den mindestens zwei Zylindern (46, 52) ansteigt, sich
das Druck-Entlastungs-Ventil (66) öffnet, so dass sich der Hebemechanismus nach oben
bewegt und in einer größeren Entfernung zu einer Bodenfläche platziert wird, um den
Hebemechanismus zu schützen.
2. Lade-System (4) nach Anspruch 1, wobei die mindestens zwei Zylinder (46, 52) betriebsfähig
in einer Master-Slave-Konfiguration verbunden sind.
3. Lade-System (4) nach Anspruch 1 oder 2, ferner mit einer Klemmplatte (32), die mit
Klammern (38) an der Hebewelle (18) angebracht ist, um einen Rand des Behälters (6)
an den Aufnahme-Mechanismus (16) zu klemmen, wobei die Klammern (38) mit einer oder
mehreren Federn (40) versehen sind, um Stöße teilweise zu absorbieren.
4. Lade-System (4) nach einem oder mehreren der Ansprüche 1 bis 3, wobei eine relativ
zum Aufnahme-Mechanismus (16) drehbare Abdeckung (54) an der Hebewelle (18) vorgesehen
ist, um den Aufnahme-Mechanismus (16) abzudecken.
5. Lade-System (4) nach einem oder mehreren der vorhergehenden Ansprüche, ferner mit
einem Wiege-System zum Wiegen eines zu entleerenden Behälters (6).
6. Lade-System (4) nach einem oder mehreren der vorhergehenden Ansprüche, ferner mit
einer Führung (26), die an einem oberen Teil des Lade-Systems (4) angebracht ist,
so dass bei der Schwenkbewegung des Behälters (6), wobei der Behälter (6) zum Entleeren
umgedreht bewegt wird, ein Deckel des Behälters (6) durch die Führung (26) geöffnet
wird.
7. Lade-System (4) nach einem oder mehreren der vorhergehenden Ansprüche, ferner mit
einem Anschlag (28), der an einem oberen Teil des Lade-Systems (4) angebracht ist,
so dass bei der Schwenkbewegung des Behälters (6), wobei der Behälter (6) zum Entleeren
umgedreht bewegt wird, das Anschlagglied (28) verhindert, dass sich der Behälter (6)
weiter dreht.
8. Müllwagen (2) ausgestattet mit einem Lade-System (4) nach in einem oder mehreren der
vorhergehenden Ansprüche.
9. Verfahren zur Entleerung eines Behälters (6), umfassend:
- Bereitstellen eines Müllwagens (2), mit einem Lade-System (4) nach Anspruch 8;
- Aufnehmen eines zu leerenden Behälters (6) unter Verwendung des Lade-Systems (4);
- Entleeren des Behälters (6) mit dem Lade-System (4); und
- Absetzen des geleerten Behälters (6).
10. Verfahren nach Anspruch 9, ferner mit den Schritten:
- Öffnen des Druck-Entlastungs-Ventils (66), wenn ein Hindernis eine bestimmte Kraft
auf den Hebemechanismus ausübt und der Druck in den mindestens zwei Zylindern (46,
52) ansteigt; und
- Bewegen des Hebemechanismus aufwärts.
1. Système de chargement (4) pour vider des conteneurs (6), le système de chargement
(4) comprenant des montants (12) et un mécanisme de levage qui comprend en outre :
- deux bras de levage (14) montés sur les montants (12) ;
- un arbre de levage (18) monté entre les deux bras de levage (14) et s'étendant sensiblement
sur la totalité de la largeur du système de chargement (4) ;
- un mécanisme d'enclenchement (16) fixé à l'arbre de levage (18) pour ramasser un
conteneur (6) ; et
- au moins deux vérins (46, 52) placés sur ou près des montants (12) pour déplacer
les deux bras de levage (14),
caractérisé en ce que les au moins deux vérins (46, 52) sont raccordés opérationnellement à une soupape
de décharge (66), dans lequel, au cas où un obstacle exerce une force déterminée sur
le mécanisme de levage telle que la pression dans les au moins deux vérins (46, 52)
augmente, la soupape de décharge (66) s'ouvre pour que le mécanisme de levage se déplace
vers le haut et soit placé à une distance plus grande à partir d'une surface de sol
pour protéger le mécanisme de levage.
2. Système de chargement (4) selon la revendication 1, dans lequel les au moins deux
vérins (46, 52) sont raccordés opérationnellement dans une configuration maître-esclave.
3. Système de chargement (4) selon la revendication 1 ou 2, comprenant en outre une plaque
de serrage (32) raccordée avec des supports (38) à l'arbre de levage (18) pour serrer
un bord du conteneur (6) sur le mécanisme d'enclenchement (16), dans lequel les supports
(38) sont munis d'un ou plusieurs ressorts (40) pour absorber partiellement les chocs.
4. Système de chargement (4) selon une ou plusieurs des revendications 1 à 3, dans lequel
un capot (54) rotatif par rapport au mécanisme d'enclenchement (16) est prévu sur
l'arbre de levage (18) pour couvrir le mécanisme d'enclenchement (16).
5. Système de chargement (4) selon une ou plusieurs des revendications précédentes, comprenant
en outre un système de pesée pour peser un conteneur (6) à vider.
6. Système de chargement (4) selon une ou plusieurs des revendications précédentes, comprenant
en outre un guide (26) fixé à une partie supérieure du système de chargement (4) tel
que pendant le mouvement pivotant du conteneur (6), où le conteneur (6) est entraîné
la tête en bas pour vidage, un couvercle du conteneur (6) est poussé à s'ouvrir par
le guide (26).
7. Système de chargement (4) selon une ou plusieurs des revendications précédentes, comprenant
en outre un organe de butée (28) fixé à une partie supérieure du système de chargement
(4), de sorte que pendant le mouvement pivotant du conteneur (6), dans lequel le conteneur
(6) est entraîné la tête en bas pour vidage, l'organe de butée (28) empêche le conteneur
(6) de continuer à tourner.
8. Camion à ordures (2) pourvu d'un système de chargement (4) tel que revendiqué dans
une ou plusieurs des revendications précédentes.
9. Procédé de vidage d'un conteneur (6), comprenant :
- l'équipement d'un camion à ordures (2) avec un système de chargement (4) tel que
revendiqué dans la revendication 8 ;
- l'engagement d'un conteneur (6) qui doit être vidé à l'aide du système de chargement
(4) ;
- le vidage du conteneur (6) avec le système de chargement (4) ; et
- la dépose du conteneur (6) vidé.
10. Procédé selon la revendication 9, comprenant en outre les étapes de :
- ouverture de la soupape de décharge (66) au cas où un obstacle exercerait une force
déterminée sur le mécanisme de levage et une pression dans les au moins deux vérins
(46, 52) augmenterait ; et
- déplacement du mécanisme de levage vers le haut.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only.
It does not form part of the European patent document. Even though great care has
been taken in compiling the references, errors or omissions cannot be excluded and
the EPO disclaims all liability in this regard.
Patent documents cited in the description