FI70282B - ANORDNING FOER UTBREDNING AV MAKADAM ELLER LIKNANDE MATERIAL - Google Patents

Description

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Patent meddelat 15 00 1986 (51) Kv.lk. * / Lnt.CI.4 E 01 C 19/20 FINLAND —FINLAND (21) Patent application - Patentansökning 802799 (22) Application date - Ansökningsdag 08.09.80 (23) Starting date - Giltighetsdag 08.09.80 (41) Has become public - Blivit offentlig 09.03.82

National Board of Patents and Registration ____ .... . „.

* (AA) Date of launch and issue of publication— ~ o no Q / _

Patent and registration authorities '' Ansökan utlagd och utl.skriften publicerad ZÖ.UZ.OD

(32) (33) (31) Privilege claimed — Begärd priority (71) Bankruptcy estate of Ferrohaka 0y, Helsinki, Fl; Kalkkipellontie 2, 02600 Espoo, Finland-Fin 1 and (FI) (72) Kosti Simola, Huhmari, Finland-Finland (FI) (7ä) Esko Friman (5 ^) Equipment for spreading crushed stone or similar material -Anordning för utbredning av makadam eller 1 material

The invention relates to an apparatus for applying crushed stone or similar material to the edge of a carriageway from a vehicle, e.g. a truck. The apparatus preferably comprises a transport screw extending over the entire width of the platform, a drive device such as a hydraulic motor and a dosing tube, preferably attached to the right end of the screw conveyor and directed substantially downwards. The apparatus is formed as an independent unit intended to be attached to the vehicle, preferably in place of its pallet tailgate.

According to the known method, the asphalt edge filling is performed using a truck, a grader and a brush tractor. In addition, one man is required to direct the operation and perform any smaller finishing touches with the shovel.

Devices for attaching to a vehicle for spreading sand or salt from a vehicle platform to a frozen carriageway are already known. An example of this is the device disclosed in U.S. Patent No. 2,774,602. It comprises a feed pipe attached to the tailgate of a truck 2 70282 and a screw conveyor arranged transversely to its rear end. Attached to one end of the screw conveyor is a dosing funnel, through which the material fed by the screw is directed to the roadway. The screw drive device is a wheel towed behind the vehicle, which rotates due to the friction of the road surface and uses the screw through a suitable transmission.

However, the device described above is quite large in the longitudinal direction of the vehicle and interferes with other use of the vehicle. The movement of the feed screw is tied to the movement of the vehicle, in which case the thickness of the resulting layer cannot be regulated as required. Sometimes it may be necessary to dispense crushed stone while the vehicle is present, in which case the described structure cannot be used. In addition, it should be noted that if material is unloaded from the pallet through only one relatively small hole placed in the sternboard, it will certainly cause supply disturbances.

An apparatus for dispensing gravel, asphalt mass or the like is also known from SE-A-366357. Said equipment is a trolley running on its own wheels and intended to be towed behind the vehicle, with a feed screw for transferring the material to the spreading pipe. The material to be applied is also supported by the trolley in its own tank, which can be folded to be moved by the screw conveyor. The apparatus comprises a telescopically laterally displaceable part, which makes it possible to carry out the dosing very accurately in the lateral direction. The screw is driven by a hydraulic motor, which is powered by the vehicle's hydraulic system.

The object of the invention is to provide an apparatus which e.g. allows the crushed stone to be accurately dispensed onto the curb. It is also intended to provide equipment which is small in size and does not interfere with the normal operation of the vehicle, such as loading or moving on the road. To achieve this, the invention is mainly characterized by the features set out in claim 1.

In addition to the above, the advantages of the invention include a safe and trouble-free supply and a cheap price for the equipment. In the following, the invention will be explained in detail with reference to the accompanying drawing.

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Figure 1 shows a preferred embodiment of the invention from the rear (as seen from the rear of the vehicle).

Figure 2 shows a section A-A of Figure 1 on a larger scale. Figure 3 shows a side view of the device of Figure 1.

The device according to Figure 1 is a unitary unit, which as such can be installed instead of the tailgate of a truck. For this purpose, hinge points 1 are formed therein, which are better shown in Fig. 2, as well as locking points 2. The actual sternboard consists of a support structure 3 and a plate 4 attached to it. The device is dimensioned so that the upper edge of the screw is approximately level with the platform. Above the screw 6, the chute 5 is open all the way. In this case, the crushed stone or other material on the pallet can flow unhindered over the entire width of the pallet for transport by the screw and no vaulting occurs.

The screw is driven by a hydraulic motor 7. This is connected to the vehicle's hydraulic system by hoses not shown in the drawing. The operating switches of the hydraulic motor 7 are preferably located in the cab of the vehicle, so that the driver can start and stop the motor 7 from his seat.

The screw 6 transfers the material to a dispensing tube 8 fitted to the right edge of the vehicle. The dosing tube 8 is slightly tilted backwards, whereby the dosing tube is approximately straight down when the platform is tilted. An adjustable flap 9 is fitted at the lower end of the dosing tube. The position of the flap can be adjusted by a double-acting hydraulic cylinder 10.

The device according to the invention operates as follows. The vehicle is loaded in the same way as a truck with a conventional transom. In this case, the hydraulic motor is of course not used and the flap 9 is adjusted. The truck now drives to the desired application location so that the end of the metering pipe is above the desired location. The flap 9 is opened and the engine 7 is started when the vehicle starts to move. By appropriately selecting the position, travel speed and feed rate (= speed of the screw 6) of the flap 9, an excellent filling result is obtained. According to the experiments performed, the application rate with the apparatus according to the invention is up to three times that of the method described above. In addition, crushed stone consumption has fallen by about half.