JPH01299907A - Street cleaning machine - Google Patents

Abstract

PURPOSE: To provide a large cleaning machine excellent in mobility by arranging a maneuvering device so that the maneuvering center comes to the vicinity of the roller brush axis. CONSTITUTION: A street cleaning machine 1 forms an operation seat 3 of the top part, a frame 2 for firmly fixing front wheels 4a, 4b and rear wheels 5a, 5b, a refuse storage box 6, a roller brush 11 and a refuse conveyor 10 as main components, and is connected to the whole wheels 4a, 4b, 5a, 5b so that these wheels are wholly formed as maneuvering wheels. A maneuvering member 22 is arranged, and the wheels are positioned so that the rotational axes of these wheels converge in the maneuvering center in the vicinity of an extension line of the symmetrical axis 12 of the roller brush 11 when bending on a steep curve.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a street cleaning machine with the ability to pick up and transport trash.

BACKGROUND [Prior Art] As is known, certain street cleaning machines configured for the cleaning of large surfaces, such as urban surfaces, have a cab and a suitable a tank containing water to moisten it and settle dust in preparation for regular cleaning; a storage box to collect the debris picked up from the ground; a brush in contact with the ground; and a brush to collect the debris from this brush. The receiver is comprised of a refuse conveyor which is operated to pick up and discharge the refuse into a refuse bin.

These brushes are usually frustoconical or cup-shaped lateral and forward brushes arranged with an axis of rotation transverse to the surface to be cleaned and substantially parallel to said surface in a substantially central area of the machine. and a cylindrical or roll-shaped brush having a rotational axis.

These side and front brushes direct the waste to the roll brushes which redirect it to the waste conveyor.

The applicant has made a machine of the type described above, in which the waste conveyor is arranged between the waste bin and the driver's cab and extends vertically upward from an area close to the ground to collect the waste. The machine is divided into two separate parts, the front part containing the cab, engine and steering front drive wheels, and the rear part containing mostly garbage. A storage box is attached.

This waste conveyor is formed by a plurality of movable scrapers carried on and driven by chains, these chains being driven by sprocket wheels and these sprocket wheels being driven by specially provided motors. .

This type of machine has proved useful and is extremely compact in size for a given load and the amount processed in a given time.

However, in practical use it may be desirable to increase the load capacity and dimensions of the machine, and more generally its overall performance.

This is because dump sites and incinerators tend to be located at increasingly greater distances from cities, as the contamination problems inevitably caused by garbage dumps and incinerators have become a major concern. . Similarly, waste conversion plants for power reuse or reusable materials contained in the waste tend to be located further away from residential areas.

As a result, it is possible to continue operating for long periods of time (and to avoid the need for frequent trips to dumping sites or waste incineration plants).
It must have sufficient capacity.

Ideally, such machines should be able to operate throughout the day to pick up waste, reaching the dumping site or incinerator several kilometers away only at the end of this day's work. It is.

Practical tests carried out by the applicant have shown that a machine of the type described above cannot be obtained simply by enlarging the conventional machine or its waste bin.

In particular, street sweeping machines are the first type of machinery that is required to reach all areas to be cleaned quickly and accurately in order to perform basic litter-picking operations with reasonable accuracy.
location and, on the other hand, must try to avoid the many obstacles encountered. Machines of large dimensions cannot move with sufficient agility in the obstacles posed by the city unless large steering angles are provided for their steering wheels. However, this seems to be incompatible with the cleaning action and, due to the large steering angle, the path along which the front and side brushes guiding the dirt material is substantially reduced to a centrally located cylindrical or roll brush. This leaves a range of passageways on the ground that do not overlap with the passageways.

This not only leaves areas on the ground that are not cleaned;
It also leaves areas with accumulated dust and dirt, ie areas with dirt collected by the side and front brushes that the roll brushes were unable to pick up.

Furthermore, as the steering angle of the wheels increases, the roll brushes, which have an axis of rotation substantially parallel to the ground and perpendicular to the longitudinal direction of the machine, become more likely to skid on the ground, i.e. parallel to the axis of the roll brushes, which increases skidding on the ground. It becomes dragged along the path where large components exist.

Such a side-slipping motion causes the open bristles constituting the roll brush to be oriented in the axial direction of the roll brush. This is because when making tight sharp turns, the roll brush is twisted and flattened along its axis, so that the roll brush can no longer properly carry out its basic ground-cleaning action and also transfers waste material to the vertical conveyor. This results in the inability to lead to anything. Furthermore, it will be appreciated that such twisting of the roll brush increases wear on the brush, thereby requiring its frequent replacement.

Due to the large dimensions of the machine, maneuverability is also affected by the lack of direct visibility by the operator of the area where the work is being carried out. This problem can only be partially solved by using different viewing mirrors.

Furthermore, if the engine of a conventional machine were to be rated higher in power in order to obtain adequate speed during the drive to the dump site or incinerator, the result would be a powerless machine part with poor street maneuverability. It should be noted that

In fact, in order to carry out various street cleaning operations, it is possible to operate at very low speeds for long periods of time, and it is possible to operate at these very low speeds without sudden response to the control. This requires a power plant in which all movements can be controlled in a simple and precise manner.

By increasing the size and power of conventional machines, other disadvantages arise, such as - tall vertical conveyors and very large waste bins. This is because it attempts to ensure sufficient filling of the bin even when the bin is filled almost to its brim.

The chain holding the waste conveyor paddle, which runs from the area close to the ground over almost the entire height of the bin and is subject to high stress, is not always as taut as initially. This slack in the chain will reduce the efficiency of the conveyor.

Because of these drawbacks, street cleaning machines of the above type are now made relatively compact and, at the end of their working process, require significant interruptions lasting several hours or more to transport the picked up garbage over long distances. It is not possible to meet the above operational demands without this.

[Problem to be solved by the invention]

In view of this situation, the technical problem of the present invention is to devise a machine of the above-mentioned type, but also of large size, which substantially eliminates the above-mentioned disadvantages.

In this technical problem, an important object of the present invention is a large size, large load capacity and sufficient running speed over roads and main roads, yet efficient and easily maneuverable. It is also an object to provide a machine that is convenient to control during street cleaning operations.

[Means for solving the problem] The above technical problem and the stated purpose are to provide a support frame having a main length in the longitudinal direction, whose rotational axes both converge to one point when making a sharp curve. front and rear wheels for cleaning, a cab, a motor member, a waste bin, and a roll brush having an axis of symmetry located substantially parallel to the surface to be cleaned and transverse to said longitudinal length. and a garbage conveyor for transporting garbage from the roll brush to the storage box, which engages all of the wheels so that they all serve as steering wheels, and when making a sharp turn, the axis of rotation thereof is aligned with the axis of symmetry of the roll brush. a steering member adapted to position said wheels so as to converge on a steering center proximate to an extension of said street cleaning machine having at least an attached support frame. .

〔Example〕

BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the invention will become clearer from the following description of a preferred embodiment of the machine according to the invention, taken in conjunction with the accompanying drawings.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, the street cleaning machine of the present invention is generally designated by the reference numeral 1.

Referring briefly and particularly to FIG. 1, this machine 1 has a cab 3 at its top and two front wheels 4a and 4b and two rear wheels 5a and 5b, which in this particular example are drive wheels, at the bottom. It has a frame 2 which is firmly fixed. In the figure, a indicates a wheel on the right side with respect to the forward direction, and b indicates a wheel on the left side. Each wheel, of course, has an axis or axis of rotation, which axes are such that during maneuvering these axes converge or converge together.

The frame 2 has a principal longitudinal length, which in practice corresponds to the forward direction of travel of the machine I. Parallel to this longitudinal direction are two longitudinal side frames consisting of a right frame and a left frame, on which the wheels are arranged.

Attached to the rear part of the frame 2 is a waste storage box, inside which there is a row of filters 7 in its raised position and a first section 8a of the suction duct placed downstream of this filter bank 7. It is provided. A second part 8b of the intake duct connects the first part 8a to an intake turbine 9 fixed to the frame 2.

The filter bank 7 consists of a set of modular elements 7a, which extend substantially over the entire length of the storage box 6 and above the reduced height.

These modular elements can be separately assembled and removed from the seat.

An oscillator 7b formed from a rotating rod to which a continuous eccentric lift is mounted is arranged on the underside of the module element 7a and is adapted to intermittently strike the filter during its rotational movement and shake off dust from the filter. do.

The comic conveyor IO extends substantially vertically in front of the storage box 6 over substantially the width of the frame 2 and communicates with the storage box 6 via a top opening formed in the storage box.

A roll brush 11 is provided below the storage box 6 and slightly behind the conveyor 10. This roll brush 11 has an axis of symmetry 12, which is also the axis of rotation of this roll brush and is located parallel to the surface to be cleaned and at right angles to the main longitudinal length of the frame 2 of the machine 1. ing.

A rigid housing 15 holds the roll brush 11 and is supported on each side frame by a pair of swingable parallel elements 16 pivotally mounted to the frame so as to form an articulated quadrilateral. .

A water tank 17 is provided between the conveyor lO and the suction turbine 9, and in front of the roll brush 11 there are two counter-rotating cup-shaped brushes 18a on the sides of the frame for directing the debris towards the roll brush 11. It is arranged in the direction. A third adjustable brush 18b is located at the front of the frame 2.

As shown in FIG. 2, this machine 1 is advantageously provided with a four-wheel steering system, and the front-wheel steering system and the rear-wheel drive are operated essentially intermittently, so that the axis of rotation of all wheels is The steering center 13 of the machine I resulting from the intersection of each coincident straight line is close to the extension of the axis of symmetry 12 of the roll brush 11 or at least close to the strip defined by the generatrix 12a of said roll brush 11. It is well located.

Since the roll brush 11 is arranged substantially inside the machine 1, but is not located between the front wheels and the rear wheels in normal times, the respective steering angles α and β of the front wheels 4 a r 4 b are different from the respective steering angles δ and T of the rear wheels 5a and 5b.

Furthermore, FIG. 2 shows that when the steering wheel 13 is in the vicinity of the axis 12 in the case of all-wheel drive, or in the case of driving only the front wheels and the second steering center 14 is on the axis of the rear wheels, a sharp turn can be made. One end 11a of the roll brush 11 when cutting
Paths 13a, 14a drawn by are shown.

In the former case, the cleaning strip area of the roll brush 11 overlaps with the area cleaned by the cup-shaped brush 18a, but in the latter case, a strip area is left that is not cleaned by either the cup-shaped brush 18 or the roll brush 11. I understand that. Finally, FIG. 2 shows two minimum maneuvering radii 13b
, 14b, the radius 13b being clearly smaller than the radius 14b as provided by the invention.

The steering elements 22 for the front drive wheels 4a, 4b and the rear wheels 5a, 5b are shown in FIG.

In the figure, the driver's cab 3 is provided with two simultaneous control sections capable of dual control, or a selective operation section consisting of left or right control wheels 19a and 19b which are operated alternately according to road traffic regulations. A dash board 20 is provided at the center of the driver's cab 3 between the two steering wheels, and this dash board 20 can be attached to the left steering wheel 19a or the right steering wheel 1 as required.
The direction can be changed to face 9b. In the example of dual control, the selection of the right control station or the left control station is determined by which side of the field of view is visible when maneuvering.

A control knob 20a with a key 20b is provided inside the dash board 20 to set either normal front wheel steering or all wheel simultaneous steering.

Two angle drive devices 21 drive the steering wheels 19a and 19.
b also connect them to a control member 22, which first of all has a hydraulically actuated control mechanism 23, which is known per se.
The hydraulic mechanism 23 is supplied with oil under pressure by a unit 26 having a reservoir 27, a filter 28 and a pump 29.

The hydraulically operated steering mechanism 23 controls the right front wheel 4a via a motion element or linkage 24 connected to a louver 24a mounted directly on the wheel 4a.

One end of the first lever 24a is connected to the first hydraulic cylinder 3.
1 (connected to the rod of a first piston 30). The first cylinder 31 is in hydraulic communication via two first lines 32 to a similar second hydraulically actuated cylinder 33;
The hydraulic actuating cylinder 33 has its rod connected to the second lever 35.
It has a second piston 34 connected to the right rear wheel 5a by a.

The first piping 32 is connected to the first cylinder 31 and the second cylinder 33.
is provided, the first fluid actuating device 25 of which is closed and rigidly connected to the first louver 24a, and in the illustrated example with a wheel 4a in the longitudinal direction of the right-hand frame 2, on which the right-hand wheels 4a, 5a are mounted. 5a to ensure that the maneuvers are performed at the same time. In practice, elements 31, 32, 3
3 forms a rigid hydraulic rod, each movement of the piston 30 in the first cylinder 31 must correspond exactly with the movement of the second piston 34 in the second cylinder 33.

Therefore, the partition wall caused by the waste conveyor 10 having an appropriate width close to the width of the frame 20 as described above is eliminated, and the front wheels and rear wheels are firmly connected. Furthermore, mechanical front and rear transmission elements are provided which coordinately actuate the steering action of the front wheels 4b and the rear wheels 5b, respectively.

The front transmission element 36 extends from the third lever 24a and is connected to a third lever 36a that is directly attached to the left front wheel 4b.

The rear transmission element 37 extends from the second lever 35a and is connected to a fourth lever 37a mounted directly on the left rear wheel 5b.

A second fluid actuator 40 is arranged to connect to the hydraulically actuated steering mechanism 23 and extends along the left side of the frame 2 opposite to the side on which the hydraulic splint is mounted. This second fluid operating device 40 includes a third cylinder 38 to which the third lever 36a of the left front wheel 4b is attached, a fourth cylinder 39 to which the fourth lever 37a of the rear wheel 5b is attached,
A second pipe 41 that interconnects the cylinders 38 and 39 is provided.

The locking assembly 42, which advantageously includes a pneumatically actuated member, operates to lock the rear transmission element 37 when the steering mechanisms of the rear wheels 5a and 5b are deactivated, such as when driving at relatively high speeds.

Compressed air is supplied to lock assembly 42 from a first electrical air distributor 43 .

By locking the rear wheels, the second electric distributor 4
1a is actuated via pipes 41 and 32 to deactivate the second and fourth cylinders 33 and 39.

It should be noted that FIG. 4 also shows a third electrical distributor 32a coupled into the first line 32 to control overall hydraulic flow.

The machine 1 is driven forward by an interlocking member comprising two motors as shown in FIG. The first gasoline engine 44 is shown generally by both solid and dashed lines and has a drive system having a series of gears 45a that receives and receives motion from a gearbox or speed transmission 46 and transmits it to a differential gear 47. Via the connection consisting of 45, the forward drive of the machine 1 can be made faster.

For slow speed forward travel, the machine 1 uses a second hydraulically operated motor 48 operated from a pump 49 driven by a gearbox 46 meshing with a top speed gear. In this case, the connection shown in dashed lines in FIG. 6 is in the connected state, and the drive device 45 shown in broken lines and having the gear 45a is uncoupled.

1 and 5 also show that the vertical waste conveyor 10 is equipped with a drive shaft 50 in its upper part and a secondary shaft 51 in its lower part. The drive shaft 50 is mounted on two self-aligning bearings 52 and carried on two movable plates 53. The movable plate 53 is movable vertically across the wall 54 of the conveyor 10 and is pulled upwardly by the tensioning member. The conveyor 10 has a lever 55 on each wall 54.
, a trunnion 56 welded to the wall 54 and supporting the lever, and a first spring 57 attached to one end of the lever 55.

Furthermore, a cam 58 is provided which biases each movable plate 53 and is stabilized by a second suspension ring 59. In practice, the cam 58 is used to perform the initial or resistive basic alignment and the lever 55 is used to adjust the slack.

The drive shaft 50 is hollow and at its -end there is a pin shaft 60 of a small hydraulic motor 60 held against the drive shaft 50 by a screw link 61.
It carries a. ``Thereby, there is no direct connection between the movable plate 53 and the hydraulic motor 60. key 6
2 prevents rotation of the hydraulic motor 60 and allows this motor 60 to move on the drive shaft 50 which is lowered and raised. A pair of first sprocket wheels 63 are fixed to the drive shaft 50 near their ends and carry two chains 64 running around a second sprocket wheel 65 mounted on the secondary shaft 51. A scraper plate 10a is attached to the chain 64 for receiving dirt material from the roll brush 11 and discharging it into the storage box 6.

Machine 1 operates as follows.

At the athlete's choice, either all-wheel maneuvers or front-wheel only maneuvers are performed. All-wheel steering is however intended for cleaning operations.

In summary, the steering member 22 acts on the right front wheel 4a via a hydraulically actuated steering mechanism 23 and the first fluid actuated device 2
Measures for maneuvering through the right rear wheel 5. transmitted to il.

Mechanical transmission elements 36, 37 transfer the movement of the right front wheel 4a to the left front wheel 4b and the movement of the right rear wheel 5a to the left rear wheel 5b.
It operates to transmit equally.

The second fluid actuator 40 finally operates to interconnect the left front wheel 4b and the left rear wheel 5b.

The fluid actuators 25 and 40 and the transmission elements 36, 37 are connected to the wheels via levers 24a, 35a, 36a, 37a, the dimensions of which determine the steering angle of each wheel.

Once the position of the roll brush 11 relative to the wheel is known, the lever is dimensioned according to the invention so that the axis of the wheel converges to a point close to a straight line defined by the axis of symmetry 12 of the roll 11. The steering angles α, β, T, and δ that act as follows are obtained. The steering center formed by the intersection of the wheel axes is therefore likely to approach the frame 2 of the machine 1 due to the range of steering action.

During the cleaning operation, an optimal control station is used in conjunction with direct visual monitoring of the cleaning operation, and for its propulsion, this machine 1 is flexible and simple to maneuver at very low speeds. A hydraulic motor 48 is used to ensure high speed. On the one hand,
During road travel to the dump site or incinerator, the gasoline engine 44 is used and the rear wheel steering is locked. Even with the large dimensions of the storage box 6, the introduction of waste into the storage box can be carried out efficiently by means of a conveyor 10, whose construction is characterized by the presence of a mechanical connection between the front and rear wheels. It becomes absolute and its chain 6
4 is always kept under tension by the motor 60 following any rocking motion of the chain drive shaft 50.

Furthermore, the position of the roll brush 11 is not only due to the fact that the vertical center of the machine 1 is always in the vicinity of the extension of the roll brush axis, but also because of the articulated quadrilateral formed by the swingable element 16, which It should be noted that the contact with is always accurately measured and thus maintained accurately at all times.

Due to the presence of the articulated quadrilateral, the motor 44 can also be used to lift the roll brush 11 while driving on the road.

〔Effect of the invention〕

The invention provides important advantages.

In fact, the maneuverability of this cleaning machine is good despite its large size.

This steering method used for wheels, where the steering angle of the front wheels is different from that of the rear wheels and whose steering center is close to the roll brush axis, prevents the roll on the ground even during severe sharp curve maneuvers. Appropriate smoothness of the brush can be obtained. This ensures that the roll brush is not subjected to any twisting in a direction parallel to its axis, which could damage it and reduce its efficiency and life. Furthermore, no uncleaned areas or traces of trash are left on the ground.

The steering device used here allows all-wheel steering to be operated simultaneously in a precise manner and eliminates bulkhead obstructions represented by the presence of a waste conveyor.

In fact, the connecting piping for the fluid-actuated steering device occupies only a small amount of space and can therefore be installed through long tortuous passages without difficulty.

The propulsion of this machine with two different motors can meet the requirements of high travel speeds when needed and low and easily controlled speeds during cleaning.

It should be noted that the first gasoline engine together with the second motor need not be stopped during operation and it is sufficient to couple or uncouple the mechanical elements to change the drive to the drive wheels. be.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view, Figure 2 is a diagram showing the path taken by the brushes of the original machine with the controls completely locked, and Figure 3 is the machine shown in Figure 1. FIG. 4 is a diagram showing the fluid actuation device and motion elements provided for the steering wheels; FIG. 5 is an upper view of the vertical waste conveyor shown in FIG. 1; FIG. 6 is a diagrammatic representation of a control member. 1... Street cleaning machine, 2... Frame, 3...
・Driver's cab, 4a, 4b...Front wheel, 5, a,
5b... Rear wheel, 6... Garbage storage box, 10...
Garbage conveyor, 11... Roll brush, 12... Axis line, 13... Control center, 22... Control member, 23... Hydraulic operating mechanism, 25... Fluid operating device, 31, 33. ...Cylinder, 32...Piping,
36, 37...Transmission element, 44...First engine, 48...Hydraulic operating motor, 49...Pump, 50... Drive shaft.

Claims (1)

[Claims] 1. A frame (2) having a main longitudinal length, which includes front wheels (4a, 4b) and rear wheels whose axes converge together when making a sharp turn. (5a, 5b
), a cab (3), a motor member (44, 48),
a waste bin (6), a roll brush (11) having an axis of symmetry (12) located substantially parallel to the surface to be cleaned and transverse to said longitudinal length; A street cleaning machine for picking up and transporting garbage, which is equipped with at least a garbage conveyor (10) for conveying the garbage from said wheels (4a, 4b, 5a, 5b) to said storage box (6). ) are connected to all of the wheels (4a, 4b, 5a, 5b), making these wheels all control wheels, and when making a sharp curve, the axis of rotation of these wheels (4a, 4b, 5a, 5b) coincides with the axis of symmetry (12) of the roll brush (11).
) A street cleaning machine characterized by comprising a control member (22) that positions the wheels (4a, 4b, 5a, 5b) so as to converge on a control center (13) near an extension line of . 2. The steering member (22) has different front wheels (4a
, 4b) and the rear wheels (5a, 5b).
1) is the front wheels (4a, 4b) and the rear wheels (5a, 5b).
2. The machine of claim 1, wherein the machine is offset from an intermediate position. 3. The control member (22) is connected to the front wheels (4a, 4b)
and the rear wheels (5a, 5b), the cylinder (3
at least one fluid actuated device (2
5), which cylinders (31, 33) are connected to at least one said front wheel (4a) and at least one said rear wheel (5a), and which are connected to said frame (5) parallel to said longitudinal length. 2) with piping (32) for said cylinders (31, 33) connected to a side frame of said frame (2), said frame (2) being traversed said longitudinal length by said waste conveyor (10). 2. A machine according to claim 1, wherein the machine is penetrated by a. 4. The control member (22) is connected to the front wheels (4a, 4b)
The first and third levers (24a, 3
6a), second and fourth levers (35a, 37a) selectively connected to the rear wheels (5a, 5b), and the first
lever (24a) and selectively the third lever (36).
a) a hydraulically actuated steering mechanism (23) connected to one of said front wheels (4a, 4b) via a first and second fluidly actuated cylinder (31, 33) which are mutually equal; The cylinders (31, 33) are connected to one of the front wheels (4a, 4b) and one of the rear wheels (5a, 5b) via levers, respectively, and the cylinders (31, 33) are connected to each other via levers. a first fluid actuator (25) extending along one side; the front wheels (4a, 4b) and the rear wheels (5a);
, 5b), mechanical first and second transmission elements (36, 37) coupled together. 5. The steering member (22) further comprises one of the front wheels (4a, 4b) and one of the rear wheels (5a, 5b) selected to be released from the first fluid actuated device (25). a second fluid actuator (40) coupled to said second fluid actuator extending along a side frame of said frame (2) free from said first piping (32); 5. Machine according to claim 4, characterized in that it has a second pipe (41). 6. The control member (22) is configured to control the rear wheel (5a,
5b) a locking assembly (42) which can be controlled to lock to prevent maneuvering of the machine, said locking assembly (42) being arranged to stabilize the machine while driving on the road; Machine according to claim 3. 7. In order to control the steering member (22), the cab (3) is provided with two steering wheels (19a, 19b) located side by side along a direction transverse to the longitudinal length; 4. Machine according to claim 3, further comprising a dashboard (20) intermediate the wheels (19a, 19b) and pivotable towards these steering wheels. 8. A first gasoline engine (44) for high-speed running and a second hydraulically operated motor (44) for low-speed forward motion of the machine during work.
48) The machine according to claim 1, further comprising: 48). 9. In order to operate the second motor (48), a pump (49) is interposed between the first engine (44) and the pump (49) and controlled to be disconnected. 9. Machine according to claim 8, characterized in that it is provided with a drive (45) capable of rotating. 10. The waste conveyor (10) mounted across the frame (2) is connected to a transfer scraper plate (10a) and to the scraper plate (10a) and around sprocket wheels (63, 65). Chain running (64)
a drive shaft (50) and a secondary shaft (51) connected to the sprocket wheels (63, 65); and a drive motor carried directly on the drive shaft (50) for rotating the drive shaft (50). (60) and
4. Machine according to claim 3, comprising tensioning members (55-59) of the drive shaft (50) and a movable plate (53) provided for supporting the shaft. 11. The tensioning members (55-59) include a lever (55) at each end of the drive shaft (50), a fixed trunnion (56) to which the lever (55) is pivotally mounted, and a fixed trunnion (56) to which the lever (55) is pivotally mounted; 55) so that this lever (55) acts on one said movable plate (53);
a spring (57), a cam (58) for pressing the movable plate (53), and a cam (58).
) a second spring (59) for positioning the machine according to claim 10. 12. The roll brush (11) is connected to the garbage conveyor (
10) and the rear wheels (5a, 5b) to support the roll brush (11).
11. Machine according to claim 10, further comprising: 2) a swingable movable element (16) supported thereon and arranged to form an articulating quadrilateral.