The invention relates to a waste container, comprising a bin provided
with four walls that is closed at the bottom by a base and that bears a lid at
the top, which bin can be gripped between two arms of a gripper for lifting and
Waste containers of this type are known and are increasingly being
used for the collection of domestic waste. At set times the waste containers are
put out along the road in order to be emptied into the collection chamber of a
lorry. Usually such a lorry is fitted with an unloading system by means of which
the waste containers can be lifted at a pick-up ridge or recess on the front and
then emptied into the collection chamber by tipping. In addition to the driver
of the lorry, personnel who bring the containers to the unloading system are also
needed for this purpose.
Unloading systems by means of which the driver is able to perform
these operations on his own have also been known for some time. Such unloading
systems have a gripper with two arms between which the container can be gripped.
The gripper can then execute a lifting movement and a tilting movement for emptying
Since these activities are usually carried out at a high work rate,
the lifting and tilting movements proceed with relatively high accelerations and
decelerations. This means that the container has to be gripped fairly firmly, such
that the container cannot unintentionally be propelled out of the gripper. Moreover,
the container is also gripped somewhat more firmly immediately after emptying to
compensate for the loss of the internal excess pressure of the load that has been
unloaded. In addition, the somewhat tapered shape of the bin plays a role. As a
consequence of this the bin is easily able to slip out of the gripper.
With the known containers the problem now arises that the walls of
the bin are always deformed by the gripping of the gripper. As a result cracks
occur in the long term, such that the container becomes unusable.
The aim of the invention is to provide a waste container of the type
mentioned in the preamble which is better able to withstand the forces that arise
during gripping by the gripper and that can also be handled safely during unloading.
Said aim is achieved in that the bin is provided with an attachment on which an
arm is able to engage. Preferably at least two opposing walls each bear an attachment.
The attachment on the container according to the invention absorbs
the forces exerted by the arm concerned and distributes these regularly over the
wall. If the bin has an external collar at the top, the attachment is preferably
braced underneath the collar. With this arrangement the attachment can have a strip
running around the wall in the circumferential direction of the bin, as well as
a support extending upwards from the strip to underneath the collar. The strip
can have two parallel ridges between which the arm, such as the clamping bands
thereof, can be accommodated. In this way the container can be properly held, even
under relatively high accelerations and decelerations such as arise during unloading.
Preferably, the strip is curved and at both ends joins onto the corners that form
the transition with the adjoining walls of the bin. The attachment can run completely
continuously around the container.
The attachment can also be fitted at a location other than the wall,
for example at a corner between two walls.
The invention also relates to an attachment for fitting on a container
as described above. Said attachment can have a strip to be fitted around the wall
in the circumferential direction of the bin, as well as a support extending upwards
from the strip.
The invention further comprises a waste collection system, comprising
at least one waste container as described above, as well as an unloading installation
having a gripper provided with at least two arms. This unloading installation is
usually constructed as a lorry provided with a collection chamber for waste, as
well as a gripper for lifting and, by means of tipping, emptying the waste container
into the collection chamber. Each of the arms can, in a known manner, comprise
a rigid support, which supports bear a flexible band on the sides thereof facing
In such a system the attachment can be provided with a transponder,
whilst the gripper can have sensor means for transmitting data concerning the transponder.
The advantage of this embodiment is that by virtue of the gripping of the attachments
by the gripper arms the sensor means are always able to assume the correct position
with respect to the transponder. As a result reliable detection is possible.
The invention will be explained in more detail below with reference
to an illustrative embodiment shown in the figures.
Fig. 1 shows a front view of the waste container according to the
invention with an attachment on the two side walls.
Fig. 2 shows a side view of the container according to Figure 1.
Fig. 3 shows a horizontal cross-section according to III-III in Figure
2, the arms of a gripper also being shown in Figure 3.
The waste container shown in Figures 1 and 2 comprises a bin 1 provided
with two side walls 2 and two cross walls 3. The bin 1 is closed at the bottom
by a base 4 and at the top bears a lid 5 that can be swung into the open position
shown in broken lines (see Figure 2) about the hinge 6. Close to the base 4 the
waste container has two wheels 7, such that it is mobile by means of handle 8 close
to the hinge 6.
The top of the bin 1 has a collar 9 extending outwards and downwards,
which collar 9 is stabilised with respect to the walls 2 and 3 by means of reinforcing
ribs 10, 11, respectively.
Such a waste container, loaded with, for example, domestic waste,
is put out by the kerb. The container can be unloaded by means of a lorry which
has a compartment in which the waste can be collected, as well as a lifting/gripper
device that is known per se and is not further shown here. As is shown in the cross-section
in Figure 3, this lifting/gripper device has two arms 12, which, by means of hinges
13, can be pivoted on the slide 14 that is mounted on the lorry such that it is
able to move up and down.
Each arm 12 has a rigid support 15, which rigid supports 15 bear a
flexible member, for example a band 16, on the faces thereof facing one another.
When gripping the waste container the arms 12 are clamped around the
bin 1. Fairly substantial force is exerted during this operation, if only to prevent
the container being thrown out as a result of the decelerations and accelerations
that arise during lifting. It must be considered that the container is also tilted
by the gripper in order to empty the contents into the compartment of the lorry,
as a result of which additional accelerations and decelerations arise. Moreover,
the bin 1 has a tapered shape, so that firm gripping is required for this reason
As a consequence of the fairly high pinching forces that are exerted
on the bin 1 by the arms 12, said bin is continually exposed to deformation. As
a result cracks can ultimately occur which run in the height direction of the container,
such that it becomes unusable.
In order to prevent this cracking, according to the invention the
attachments 17 are fitted. In the illustrative embodiment shown these attachments
17 are fitted on the two side walls 2. Of course, they can also be fitted on the
cross walls 3 or on all four walls. Each attachment comprises a strip 18 running
in the circumferential direction around the wall 2 concerned, as well as a support
19 extending upwards from the strip 18. This support 19 is fitted underneath and
in contact with the collar 9, specifically between the ribs 10 thereof. The strip
18 can furthermore be fixed to the wall 2 by means of screws, rivets 21 and the
As can clearly be seen in Figure 1, each strip 18 has two parallel
rims or ridges 20, between which the gripper arms 12, in particular the bands 16
thereof, are able to engage.
By means of the attachments 17 the pinching forces of the arms 12
are transmitted to the relatively rigid corners 22 of the bin 1, as a result of
which the compression of the side walls 2 is avoided and cracks no longer occur.
Furthermore, the attachment can have a specific colour that relates
to a particular category of waste.