FR2967984A1 - SECURING DEVICE FOR LIFTING SYSTEM OF A CONTAINER FOR RUBBER BEAM - Google Patents

Abstract

The present invention relates to a securing device for an on-board lifting and tilting container system in a refuse truck body comprising a container support chair arranged to pivot about an axis integral with the body, characterized in that it comprises a frame (30) for securing the area immediately adjacent to the lifting system. The frame comprises a movable piece (31) rotated about a horizontal axis (32) integral with the chair and terminated on two sides located on either side and parallel to said horizontal axis by damping means (35) arranged to cooperate with the surface of the seized container, and in a plane perpendicular or substantially perpendicular to said horizontal axis integral with the chair, a detection appendix (38) arranged to control the stopping of the descent of a container or block it when it detects a support on the wall and / or the appendix.

Description

The present invention relates to a device for securing an on-board lifting and tipping container system for emptying it into the hopper of a refuse collection vehicle, or collection vehicle. waste, of the type comprising a container support chair arranged to pivot about a horizontal axis integral with the bucket. It also relates to a gripping assembly of a container provided with such a device. It finds a particularly important, although not exclusive, application in the field of garbage collection using a dump truck or compactor truck that is loaded from the rear by tipping containers filled with waste into a hopper located at the rear of the vehicle. Many rear-loading devices of this type are known for the collection of household refuse. They are generally controlled by operators who must both set up the containers on the rear of the vehicle and control in a manner known in itself lifting and tilting. Such gripping devices present risks of accidents at the time of handling the containers. Indeed, there is a risk of shock of the container on the operator, especially during the descent of the container after emptying. Admittedly, there are security features, such as stopping or temporary barriers.

For example, a device for securing the working area of a garbage truck comprising a movable barrier connected to the truck control device is known (EP 1 619 143). If the barrier is not in place, the truck is not operated. Such devices on the one hand are very bulky and on the other hand do not settle the case where the operator is located behind the barrier, even lo when it is in place. The object of the present invention is to provide a device and an assembly which better than those previously known meet the requirements of the practice, especially in that it implements simple mechanical means, effectively preventing injury to an operator present under the containers. For this purpose, the present invention notably proposes a securing device for an on-board lifting and tipping container system in a refuse truck body, said system comprising a container support chair arranged to pivot about an axis integral with the container. bucket, characterized in that it comprises a framework for securing the area immediately adjacent to the lifting system, said frame comprising a part movable in rotation about a horizontal axis integral with the chair and terminated on two sides located on and other and parallel to said horizontal axis by damping means 30 arranged to cooperate with the surface of the seized container, and in a plane perpendicular or substantially perpendicular to said horizontal axis integral with the chair, a detection appendage arranged to control the stop the descent of a container or block it when it detects a support on the wall and / or the append ice.

In advantageous embodiments, one or more of the following provisions are also used: the detection appendage comprises two levers, each lever comprising an end 10 transversely integral but able to rotate by relative to the horizontal axis integral with the chair, a transverse external transverse bar and interconnecting said levers, and means for detecting a support on said bar; The levers are compressed coil springs; the moving part defines a surface and / or forms a substantially rectangular convex plate directed towards the outside of the system, integral with the detection appendage; the detection means comprise at least one inductive sensor; the device furthermore comprises a safety barrier comprising a horizontal bar for protecting access to the hopper, said barrier being drivable by the mobile chair between a raised safety position and a low operating position when in use. of the chair with a container, said safety barrier 30 having locking means in the high position of the barrier; the locking means comprises a cam integral with the bucket arranged to cooperate by a flattened surface with the flattened end of a junction arm moving the bar of the barrier towards the outside of the grabbing bucket of a container to empty it into the hopper of a dumpster. The invention also proposes an assembly implementing a device as described above, comprising at least one on-board lifting and tilting system of the container along a determined trajectory about a horizontal axis integral with the skip, characterized in that what the assembly comprises means of electrical motorization of the rotation of the axis. Advantageously, the assembly comprises a support chair for the container integral in rotation with the axis by means of a four-bar system articulated between two movable points integral with the chair and two fixed points integral with the axis. In an advantageous embodiment, it comprises means for hydraulic actuation of the on-board lifting and tilting of the container. The invention will be better understood on reading the following description of embodiments given below by way of non-limiting examples.

The description refers to the accompanying drawings in which: - Figure 1 is a side view of a truck with dumpster provided with an assembly comprising a device according to one embodiment of the invention. FIG. 2 is an axiometric perspective view, partly disassembled, of the assembly of FIG. 1. FIG. 2A is an explanatory diagram of the four-bar system implemented according to the embodiment of the whole of FIG. figure 2.

FIG. 3 is a front view showing the motor and its automatic control system (FIG. 3A) of the assembly of FIG. 2.

- Figure 4 illustrates in side view the operation of the assembly of Figure 2 during lifting and tilting of a container.

FIG. 5 illustrates the determined trajectory followed by the container actuated with the assembly of FIG. 2. Note that the trajectory of the container itself depends on a point considered and the rotation of the moving points.

FIG. 6 is a perspective view of the device according to the embodiment of the invention more particularly described here.

- Figures 7 and 7A show in side view in position on the container and in enlarged view the

Device of Figure 6.

- Figures 8 to 11 show, in side view, the operation of the compacting safety barrier, belonging to a device according to one embodiment of the invention, Figures 8A and 11A

Giving details of the device corresponding to FIGS. 8 and 11.

FIGS. 12 to 14 show in diagrammatic form various diagrams on the mechanical operations and of the automatism of the assembly according to a

Embodiment of the invention.

Figure 1 shows a truck 1 comprising a dumpster 2, comprising a set or device 3 for gripping a container to empty it into the hopper of the bucket 2.

Figure 2 shows the assembly 3 partly disassembled, in axionometric view. It comprises two embedded systems 4, 4 ', identical, located in parallel, side by side, at the rear of the vehicle.

With reference to FIG. 3, means 5 of electric motorization which are identical, independent, symmetrical with respect to the vertical plane 6 of FIG.

10 symmetry of the bucket, are provided.

The embedded systems 3 are used for lifting and tilting a container, according to a determined trajectory which will be detailed later.

More precisely, Figure 2 shows a

15 a system 4 in place, in a so-called high hopper position (see also FIG. 8), that is to say to empty a container, at the beginning of the cycle before lifting, and a second system 4 'extracted from the rear of the vehicle, in the low hopper position (see

Also Figure 11), that is, giving access to an operator to manually throw garbage bags into the hopper.

According to the embodiment of the invention more particularly described here, each system 4, 4 '

25 comprises a support chair 7, 7 'of the container, integral in rotation with an axis 8, 8' fixed on the bucket, through a system 9, 9 ', said four-bar system. The four-bar systems 9 and 9 'are identical.

Each system (see also FIG. 2A and FIG. 4) is formed by two first articulation parts 10 and 11, forming two movable points integral with the chair, and two second articulation parts 12 and 13 constituting the two fixed points. in solidarity with axis 8.

Two connecting rods or elements 14, 15 extend respectively over a length 1 and a length l ', each connecting rod connecting a first part to a second corresponding part.

The point 13 being fixed and the rod 15 rotating at the same time as the axis 8, the connecting rod 14 being free to rotate and move relative to the rod 15 as a function of the distance between the two mobile points 10 and 11, it will follow an optimized curve trajectory for the container.

The first hinge parts are formed, for one (the one which is greater) by a bar, itself provided with an independent part forming the attachment end of the upper peripheral edge of the container, and for the other by a horizontal bar parallel to the first provided with buffers 16 bearing on the container.

These two so-called articulation parts constitute the two moving points.

The second hinge parts, forming the fixed points integral with the axis 8 are, for their part, for example constituted by flanges 12 and 13, for example in the form of a sleeve for one surrounding the axis 8, and cheek-shaped solidarity of the center of the axis 8 for the other.

The flanges 12 and 13 are integral in rotation with the axis which, when the latter is going to rotate, will drive the chair and the container which is hooked to it (see FIG. 4) in a first time to lift it and then in a second time to rotate it and this advantageously in a substantially ellipsoidal path. The drive means of the axes 8, 8 'are moreover and as for them formed by independent electric motors on board 17 which actuate by means of chains 18, with associated gears and pinions, said horizontal axes integral with the bucket for driving the chairs. Adjustment means 19 known in themselves make it possible to modify the height of the axes 8, 8 ', independent, if it were necessary. The motors 17, for example constituted by planetary gear motors, with a sliding polymer bearing on the axis of rotation, are controlled by an automaton, for example formed by an electronic card 20 (see FIG. 3A). Drives 21 for varying the speeds of each system gives excellent flexibility of use.

The manual control of the lifting and tilting of the container is done by means of the lateral control means 22 by the operator, in a manner known per se, with the usual safety devices, supplemented by particularly advantageous means according to certain modes of operation. embodiment of the invention which will be described below, with reference to FIGS. 6 to 11. FIG. 4 shows the lifting of the container C by means of the onboard system 4.

The diagram of the substantially ellipsoidal trajectory followed by the container is for its part represented more precisely in FIG. 5, the points corresponding to the moving and fixed points 2967984 being here represented respectively for the fixed point 13 by the letter A, for the point fixed 12 by the letter B, for the moving point 10 by the letter C, and for the moving point 11 by the letter D. 5 AD = 1 has been chosen, BC = 1 ', AB = d', CD = d. It is noted that the trajectories of the points C and D being circular, but with respect to two different centers, one of which B is located on the periphery of the axis 8, and thus rotates around the other A centered on said axis, the resulting trajectory of the container is carried out in a continuous curve of shape such that it causes a lift, then a tilting then allowing the emptying forming an angle α for example 45 ° with the vertical in the final position. In other words and taking into account the possible movement of the movable points between them, the lifting then the tilting is thus obtained as shown in FIG. 5 along an ellipsoidal or substantially ellipsoidal trajectory. To allow the lifting and hooking of the container, the end 10 of the movable point comprises for example an elongated hook-shaped portion 25, for hooking on the periphery 26 of the container, in a manner known per se. FIG. 6 and FIGS. 7 and 7A show the safety device that can be used with the assembly described above according to the embodiment of the invention more particularly described. This device comprises a frame 30 for securing the area immediately adjacent to the lifting system.

The frame 30 comprises a movable part 31 rotated about a horizontal axis 32 integral with the chair.

The moving part 31 is terminated on two sides 33 and 34 situated on either side and parallel to the horizontal axis 32, by damping bars 35 arranged to cooperate with the surface (see FIG. opposite the container seized.

The frame 30 comprises in the plane perpendicular to the horizontal axis 32 of the chair, a detection appendage 38 arranged to stop the descent of a container or block it when it detects a support on the wall and / or on Appendix.

More precisely, the detection appendage 38 comprises two levers 39, for example formed by compressed coil springs, each lever comprising a hooking end 40 on the framework, transversely integral with the lever, but able to rotate relative to the horizontal axis 32 secured to the chair.

It also comprises an external crossbar 40 ', perpendicular and interconnecting the levers 39, and means 41, partially shown, for detecting a support on said bar 40'.

More specifically, the detection means 41 comprise a detecting tab 42 that is rotatably connected to a lever arm 39 which, when it rotates in front of a capacitive sensor located on the chair, sees said modified capacity, resulting in then an immediate stop of the motorization and therefore the movement of the chair. 2967984 Thus, when a user presses the bar 40 'then move the detection tab 42 relative to the sensor secured to the chair, and / or when the container is pushed / blocked by a seized

5 obstacle, for example the head of a user, then moving the security frame then causing the relative movement of the detection tab, there is stop.

In the embodiment of FIGS. 7 and 7A,

Two dampers 35 are interconnected on each side, by means of two cheeks 43, for example crescent-shaped, giving and conferring on the whole of the moving part a plateau shape and / or a substantially partially surface

15 cylindrical, convex, directed towards the outside of the system.

Advantageously, there are two tabs 42 on either side, each secured to one end of a lever arm 39, which doubles the securities.

Another element for securing the device according to the embodiment more particularly described here will now be described.

FIGS. 8 to 11 show the various stages of operation of the assembly.

25 during an automatic compaction authorized (Figure 8, 9 and 10) and in the context of an automatic compaction prohibited (Figure 11).

More precisely, the system 4 further comprises a barrier 50 for protecting access to the hopper 51,

30 provided with scraping means 52 to catch the garbage to compact, scraper which at its end 53 may result in a clumsy user.

The safety barrier 50 comprises a horizontal protection bar 54 opposite the hopper 51, said barrier being drivable by the mobile chair 4, between a raised safety position as shown in FIG. 8, and an operating position. (see Figure 9) when using the chair with a container.

Locking means 55 of the barrier in position are provided.

More precisely, FIG. 8 shows the device in the authorized automatic compacting position, in which the safety barrier is positioned in the high blocking position towards the hopper, in the so-called high hopper, beginning of cycle configuration.

Figure 9 shows the device in the so-called high hopper configuration, container locking position.

Here the safety barrier 50 is released and the chair is at the height of the barrier.

Figure 10 shows the so-called high hopper configuration, emptying position of the container, the safety barrier then being driven by the chair.

FIG. 11 shows the device in the so-called low hopper configuration in the waiting position.

25 of the container.

In this case, automatic compaction is prohibited since the safety barrier is not raised.

Indeed this one (cf figure 11A) is lowered.

Specifically with reference to Figs. 8A and 11A, which are enlarged detail views of Figs. 8 and 11, the means 55 for locking the fence in the up position will be described. They comprise a cam 56 integral with the arm 15 pivoting about the axis 8, arranged to cooperate by a flat portion 57, with the flattened end 58 of a junction arm 59 deporting the bar 54 of the barrier towards the outside 5 of the bucket, for example crescent-shaped. When the chair 4 is lowered, the part 59 rotates about an axis 60. The flat part then comes into contact with the flattened end, as shown in FIG. 8A, which constitutes the safety position where the barrier 50 is locked in the high position, preventing access to the hopper by a user located on the side 61 of the bucket. On the other hand (see FIG. 11A), in the case where one is in the so-called low hopper configuration, the safety barrier can be lowered here, the flat part no longer locking on the flattened end. In this case, however, automatic compaction is prohibited by the automated means known in themselves.

With reference to FIGS. 12, 13 and 14, the operation of the method of unloading the container in a refuse hopper according to the embodiment of the invention more particularly envisaged will now be described.

Figure 12 first gives a simplified flowchart of the steps in automatic lifting and tilting of a container. Since the device 1 is in the low position, waiting for the container (block 60), a presence test of the container is carried out in a manner known per se, for example by optical sensor (step 61) and / or a test on the conditions initials to start the automatic mode if detected presence.

The initial conditions being fulfilled, the container begins to rise (step 62). A verification test of the attachment of the chair on the container, confirming the presence of the flange of said container is then performed at 63 in a manner known per se.

If the test is not positive then there is a defect (label 64).

On the other hand, in the case of a proper check, the chair continues to climb to 65.

A container lock test at 66 is performed.

If the test is not positive, there is a fault 64, otherwise the container continues its rise to 67, following the movement causing it to tilt continuously, until reaching its upper position of total waste dump.

A test 68 on the "high position" conditions is performed.

Then there is the possibility of shaking the chair (test 69), with the decision of one or more shaking (blocks 71 and 72) or shunting the steps of

Shaking (line 70).

The controller may have been programmed to perform several shakes, in which case their number is checked (test 72).

The container being supposed empty, we go back down

30 then the chair 73, then check the loss of the container lock 74, before ending the descent 75.

A confirmation step is performed at 76. The chair being sufficiently low, the movement is finalized at 77, before testing the final low position of the chair at 78, and being able to resume the operation of the cycle (arrow 79) from the step 60.

Figure 13 schematically shows from another angle, the operating procedures of the device according to the invention. The first part 80 of the diagram

It details the procedures for stopping and restarting, the second part 81 concerning the operating procedures proper.

More specifically, the part 80 comprises on the one hand the steps 82 of restarting and on the other hand the

15 steps 83 stop.

The supply and the control command are carried out by means 84, known in themselves.

These allow actuation in manual mode

20 85 to position the chairs at the bottom.

When the low level sensor is reached (arrow 86), there is then detection of the low position at 87 with braking.

This is also validated indirectly

25 (arrow 88) and direct (arrow 89) from the automation diagnostics maintenance block 90 which allows the verification of mechanical blocking, the state of the sensors and the operation in gravity mode.

All automation and operation can of course be stopped by means of an emergency stop device 91 actuated by an emergency stop button (arrow 92) which can cut the power supply 84.

Block 83 more specifically concerns stopping procedures when, from block 99 of low position detection, it is possible (for example by means of a waiting comb of the container) to find that the container is missing in 93.

There is then (arrow 94) possibility to switch to maintenance mode (block 95) for testing the sensors, the gravity modes, the verification of the encoders, the synchronization of the chairs, the high position, etc.

In the case of detection of a sensor fault (arrow 96), it is possible to switch to manual mode in 97, which then allows (arrow 98) detection in the low position and brake lock 99.

The operating procedures 81 include tests 100 for detecting the consistency of the safety sensors and speed variation detection encoders, and tests 101 for detecting the low position and brake blocking.

In the case where there is detection of a container (arrow 102), the simple automatic chair mode 103 is started, but the semi-automatic mode 104 or manual 105 are also possible.

In case of present defect (various arrows on the block 97), there can be the disappearance of the cause by the manual operation of said block 97.

FIG. 14 shows the architecture of the automations realized by the automaton (control card) 110 (equivalent to the card 20 of FIG. 3A).

The card 110 can firstly, via a communication bus 111, transmit the received information to external recorders leading to an identification interface, a modem communication, weighing measurements etc. (arrow 112 ), in a manner known per se.

From the manual control boxes 113 (22 in FIG. 2) information and instructions can moreover be given by the operators.

The control card 110 also receives (arrow 114) the information coming from the coders 115

15 and 116 giving the speeds of the left and right electric motors 117 and 118.

The encoders actuate (arrow 119) the respective variable speed drives 120, 121 allowing action on the left and right motors 118 and 118.

20 on the corresponding brakes 122, 123 (arrows 124).

The sensors 125, 126 give to the map, the position of the left chairs 125 and right 126 (arrows 127).

Inputs / outputs are exchanged elsewhere between the card, the power switch 128, and the 24 volt / 230 volt converters 129.

A display 130 makes it possible to check and / or control the information exchanged between the various elements implementing the architecture.

30 of the automation used.

Finally, there is shown in broken lines the existing power links between the different blocks, namely the converters, contactors, 2967984 drives and, through them, the actuated elements such as motors and / or brakes. The operation of the device according to the embodiment of the invention more particularly envisaged will now be described more particularly with reference to FIG. We first bring a container C near the gripping device, and more particularly one of the two systems 4.

This is positioned next to the chair 7 which is slightly lowered to place the gripper 25 on the periphery 26 of the container C. Then the chair is manually operated by the operator who presses a side button near the the rear of the vehicle. The container being locked, it rises in a substantially ellipsoidal trajectory, pivoting little by little to form an angle a more and more important with the vertical, taking into account the system of four articulated bars and variable speed drives which allow smooth operation. The movement is done here continuously smoothly. When the container reaches the spill position after rotation about the axis as described above, shaking is performed or not, so as to take off the garbage that could have remained stuck to the bottom of the container. Then the reverse movement is performed automatically, the direction of rotation of the electric motors then being reversed. Once the container is placed on the ground with flexibility, sensors allow the descent to stop, the first container is evacuated manually and the next container can then be put in place.

In the case where an operator would find himself under the container and / or under the chair when it comes down (see Figure 7), the frame 30 securing the area immediately adjacent to the lifting system blocks the descent of the container when it detects either a support on the wall of the latter or on the appendage, the displacement of said

the appendix interlocking the inductive sensor which is duplicated on both sides of the moving part so that the movement here again stops.

In the case where we want to use the device in low hopper, without container (we simply drop

In the hopper), there are risks associated with the compacting scoop, while the operator is not protected by the safety barrier 50 (see FIGS. 8 to 11).

In this case a safety automatism linked to the

20 position of the barrier prevents the operation of compacting when the safety barrier is lowered, for example detected position via a sensor for example capacitive.

As it goes without saying and as it also results

Of the foregoing, the present invention is not limited to the more

particularly described. On the contrary, it embraces all the variants and especially those where other sensors than inductive sensors or

Capacitives are used, or those where there are means of synchronization chairs 4 and 4 'to take large containers. 20

Claims (7)

REVENDICATIONS1. Device for securing an on-board container lifting and tilting system (C) in a dump truck body (1), said system comprising a container support chair (7) arranged to pivot about an axis ( 8) secured to the bucket, characterized in that it comprises a frame (30) for securing the area immediately adjacent to the lifting system, said frame comprising a movable part (31) rotating about an axis (32) horizontal solidary of the chair and terminated on two sides located on either side and parallel to said horizontal axis by damping means (35) arranged to cooperate with the surface (36) of the seized container, and in a perpendicular or substantially perpendicular plane said horizontal axis integral with the chair, a detection appendix (38) arranged to control the stop of the descent of a container or block when it detects a support on the wall and / or the appendix. 2. Device according to claim 1, characterized in that the detection appendix comprises two levers (39), each lever comprising an end (40) transversely integral but adapted to rotate relative to the horizontal axis integral with the chair, a perpendicular external transverse bar (40 ') interconnecting said levers, and means (41) for detecting a support on said bar. 3. Device according to claim 2, characterized in that the levers (39) are compressed coil springs. 4. Device according to any one of claims 2 and 3, characterized in that the movable part (31) defines a surface and / or forms a substantially rectangular convex plate directed towards the outside of the system, integral with the appendix ( 38). 5. Device according to any one of claims 2 to 4, characterized in that the means (41) of detection comprise at least one sensor (42) inductive. 6. Device according to any one of the preceding claims, characterized in that it further comprises a safety barrier (50) comprising a horizontal protective bar (54) access to the hopper, said barrier being drivable by the movable chair (7) between a high security position and a low operating position when using the chair with a container, said security barrier having locking means (55) in the high position of the barrier. 7. Device according to claim 6, characterized in that the locking means (55) comprises a cam (56) integral with the bucket arranged to cooperate by a flat (57) with the flattened end (58) of an arm junction (59) deporting the bar of the barrier to the outside of the gripper of a container to empty it into the hopper of a dumpster. 22. Assembly (3) comprising a device according to any one of the preceding claims, characterized in that it comprises at least one system (4) onboard lifting and tilting of the container according to a determined trajectory about an axis ( 8) integral with the bucket, characterized in that the assembly comprises means (17) for electric motorization of the rotation of the axis. 9. An assembly according to claim 8, characterized in that the system comprises a chair (7) for supporting the container integral in rotation with the axis by means of a four-bar system (9) articulated between two movable points ( 10, 11) 15 integral with the chair and two fixed points (12, 13) integral with the axis. 10. The assembly of claim 8, characterized in that it comprises hydraulic actuating means of the onboard system for lifting and tilting of the container.