Mobile concrete mixer using on site stored materials - is lorry with inclined rotatable drum, chute loading skip and crane attachment

A mixer for the manufacture

concrete.

Kneaders are known for production of concrete which consist of a vehicle on the tray which is rotatably mounted, in an inclined position, a vessel or top for kneading the aggregates input thereto to the preparation of concrete.

These vehicles are generally provided at the rear of the tray of a chute, disposed below the discharge port of the vessel, for guiding the concrete, either directly in the shutter or the trench, or indirectly via a transport means.

Therefore, currently, the concrete used on construction sites

building and public works is from a fixed center, remote often of several kilometers of the work site, of which it is transported using the mixer self-supported on construction sites of use in which it is discharged and, in the great majority of cases, redistributed using pipette

Note that, often, the aggregates are also transported from the production site to the stationary centre wherein are performed the dosage of the components and the preparation of concrete, the operation of the mixer for the vehicle to move the construction having a kneading maintenance. -

Such kneaders are, accordingly, currently commonly used owing to the impossibility of disposing of all or part of the components in the performance of the concrete (aggregates, cement and water) at the place of use.

This results, or a lack of position on the construction site, or the inability to store these products, by category, at the construction site for the production of the concrete.

Furthermore, to the extent that these components may be stored on the construction site, the storage location is often too remote from the point of use, which imposes manipulations long and tiring ' taking into account the weight of the materials

Also, on certain sites, the height or the width available for the production of concrete is too low to. 'be' accessible to cranes or to allow manipulation required for loading and unloading of the mixer.

Iq is to be noted, that the quality of concrete made depends on the time between the preparation of concrete itself and the casting; gold, with mixers known, this time is relatively large, that the concrete is carried out initially in a fixed center or that^r it is formed on the construction site, taking into account the duration of the transport or of the time necessary for the manipulation.

The invention aims to remedy these drawbacks and relates to a mixer for production of concrete comprising an inclined vessel rotatably mounted on the floor of a vehicle and comprising an inner helix kneading, while a directable spout is provided in the vessel port for the casting of the concrete, mixer characterized in that it comprises, at the rear of the platform, a frame supporting, above the trough, a hopper of filling the tank through a lower port in the vessel port, and to the front of the tray, a material provided with a boom mounted on a carrier, this support being of a height such that the boom • is located at a level larger than that of the vat and the boom being of a length that the end thereof is located beyond the rear edge of the hopper.

According to another feature of the invention, the vehicle includes a water pump, the output circuit of the pump opens into the hopper.

According to another feature of the invention, the output circuit of the pump is connected to a ramp perforated provided on the circumference of the upper edge of the hopper.

According to another feature of the invention, the pump is a pump suction pressure and the vehicle has on the tray, laterally to the vessel, at least one water reservoir connected to the pump.

According to another feature of the invention, the support of the crane is disposed along the longitudinal axis of the tray

The invention is represented, by way of non-limiting example, in the accompanying drawings, in which:

-figure 1 is a perspective view of a mixer according to the invention;

-figure 2 is a plan view of Figure 1;

-figure 3 is a schematic view in axial section of the tank of the mixer.

The present invention, accordingly, to

performing a kneader for concrete manufacturing which enables to improve the quality of the concrete and therefore of constructs prepared, facilitate manufacture by reducing the manipulation and also the manufacturing cost can be reduced by decreasing investment needed for the tools and machines, by decreasing the energy consumption by suppressing movements, by increasing the speed of carried out, to permit the rapid turnover of stocks and by reducing man-d operating by implementing a self-contained and automatic cell*

The mixer represented in the accompanying drawings consists of a truck or van of locking a cockpit 1 and 2 of a tray on lequl is rotatably mounted, in an inclined position, the vessel 3 internally provided with the propeller kneading 4 (see Figure 3)*

The vessel is rotated by a gearmotor assembly 5, disposed at its front end, while the rear end, comprising the loading and unloading 5, is located near the rear end of the tray 2 and is supported by rollers (not shown).

This mixer also includes, at its rear end, a chute direction 6, placed under the discharge port 5, the chute being adjustable by means of a crank 7®.

At the rear end of the tray 2, is provided a support structure 8, on which is attached a loading hopper 9jdont the lower port 10 opens into the opening 5 of the tank above the chute 6.

Spr the tray 2 and between the cockpit and the vessel 1 3, line crane is mounted consisting of a vertical support 11, pivotally mounted at its base in^11 on the tray 2, the support receiving .11, at its upper end, by connecting rods 12, an arrow 13 for receiving, at its free end 14, a bucket 15 or other handling device. -

The boom 13 is performed using member sliding telescopically 13₁ and the control of this crane in inclination, orientation or elongation is obtained hydraulically via cylinders such as 16 from ' of a control station 17 formed on a tray 18 integral with the support 11 and arranged above the cockpit 1.

As reiçarque in Figure 1 herewith,

which represents the mixer in the rest position, the boom 13 of the crane is brought to rest on the structure of the support 8 of the hopper and constitutes therefore Λΐη cradle support.

During working, the stability of the vehicle is ensured by two side crutches 19, which can slide laterally outside of the template of the vehicle 19 ^ (see Figure 2).

Each of said stands, optionally hydraulically actuated, is provided with a sliding rod 20 terminating, at its lower end, by a sole plate 21.

However, as is seen in particular in Figure 2_t the pressure plate is eccentric with respect to the slide rod 20 so that the widest part is directed toward the interior of the vehicle.

Furthermore, to prevent the support plate

21 can be rotated by rotating the rod 20, a guide is provided in a sleeve 23 sliding 22.

This arrangement yields increased surface of the supporting plate 21 without risking that, when not in use, the tread plate can be pivoted so that the end is located at, the outside of the template of the vehicle.

As is seen in Figures 1 and 2, these two crutches 19 are arranged laterally to the tray height of the support 11 of the crane, to ensure good division of the loads when implementing the crane while the mixer is under load.

Furthermore, balance and stability of the vehicle are implemented by the fact that the support 11 of the crane is disposed along the longitudinal axis A-A (see Figure 2) of the vehicle which also allows for wide freedom of movement of the boom 13, this freedom of movement being identical on each of the side s of the vehicle.

As is also seen in Figures 1

and 2, the length of the boom 13 is such that the end 14 is situated beyond the rear end 9j of the hopper, allowing use of the crane for loading the hopper 9 of the aggregates and. cement required to manufacture the concrete, while the boom 13 may also be used to receive the concrete in the cup 15 kneaded from the chute 6.

It should be noted further that by this construction,

it is possible, at a construction site, placèr of the mixer between the point of use (formwork or excavations) and the point where the aggregates are arranged and the cement, the manipulation and the speed of manufacture is minimized since the boom 13 may be moved in both directions to convey these aggregates to the hopper or for transporting concrete from the chute to the point of use.

According to the invention, the propeller 4 kneading provided at the interior of the vessel 3 includes fingers 24 B-B directed towards the axis of the vessel on this axis and inclined alternately in opposite directions, design improve the speed and the quality of the kneading and even thousand pieces tearing of the bags containing the cement.

On vehicles according to the invention, are also provided various accessories, and in particular a vibrator 25 acting on the hopper 9 and a weighing device (not shown) associated with the support rollers rear of the tub for weighing components that have been introduced.

The mixer of the present invention is further equipped with a hydraulic circuit which can be hydrated the components of the concrete prior to introduction to the vessel, i.e. while they are still in the hopper, such hydration can be performed as it is discharged into the hopper so as to improve the quality and the speed of manufacture of the concrete.

0th circuit includes a pump suction pressure, the suction port 25₁ is connected to two water tanks mounted in parallel 26, via a line 27 and the discharge port of which 25g is connected to the hopper 9 by piping 28.

The two water tanks 26 are disposed laterally to each side of the tank 3, while the hopper 9 is provided, on the periphery of its upper opening, a ramp perforated 29 on which is connected the piping 28 to provide a pouring of the water along the walls of the hopper for performing hydration aggregates and cement or the cleaning of the hopper.

pipes 27 and 28, connected respectively to the suction and discharge ports 25 and 25g ^, are also connected to outer connecting openings 30 and 31 for connection to cables or the flexible pipes, so that the pump 25 can be used according to the connection ports 30 or 31 for drying an excavation or on the contrary for cleaning a work site or the mixer.

To this end, the hydraulic circuit has shut-off valves 32 and 35 to the holes 30 and 31 and valves 34 and 35 for isolating the pump and its binding to the ports 30 and 31 tanks 26 and the ramp 2:9.

Also, on the pipe 28 connecting the discharge port 252 to the ramp 29, a branch is provided 36 provided with a valve 37, while another valve 38 is arranged the feed point of the valve 29.

The valve 38 and opening the valve 37, can be filling the tanks 26 by connecting the branch 30 to a water source. Also, a valve 39 is disposed between the two tμyauteries 27 and 28 upstream of the valves 34 and 35 to allow short-circuiting the reservoirs 26 and the ramp 29.

Of course, the invention is not limited to the example embodiment described above and represented, from which it can be provided variants, without dislodging from the frame of the invention.