JPH0617843Y2 - Paver leveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a pavement leveling apparatus, and more particularly to improvement of a leveling apparatus technology for thick pavement.

<Prior Art> As a conventional example of a pavement leveling apparatus, there is one as shown in FIG.

That is, the deflector 2 is provided in front of the flat screed 1 in the vehicle. Then, the screw feeder (not shown) is moved forward while the vehicle is moving to the right in FIG.
The pavement material having asphalt, cement, etc. spread by the above is pressed downward by the deflector 2 and then the screed 1 is vibrated by the vibrating device 3 to bring the pavement material to a predetermined height on the flat surface of the screed 1. I try to spread them.

Further, as shown in FIG. 8, a tamper 4 that moves up and down is provided between the screed 1 and the deflector 2.
There is a method in which the pavement material is compacted at the lower end surface of the above and then spread by the screed 1.

Further, as shown in FIG. 9, there are some in which tampers 4 and 5 are arranged in parallel between the screed 1 and the deflector 2 and the pavement material is compacted at the lower end surfaces of these tampers 4 and 5. .

Further, as shown in FIG. 10, behind the screed 1,
There is one in which press bars 6 and 7 are arranged in parallel and the pavement material spread by the screed 1 is pressed by the lower end surfaces of the press bars 6 and 7 to compact the pavement material. As the pavement material, asphalt mixture, cement concrete, pre-coated aggregate, crushed stone, etc. are used.

<Problems to be solved by the device> However, in such various conventional leveling devices, the average leveling thickness is usually 15 to 20 cm, and the layering of thicker layers than that is usually required. When performing, there is a problem that it cannot be fully compacted and laid even in a deep layer. In addition, there is a problem that the material density of the pavement that has been laid out becomes non-uniform and unevenness is likely to occur on the surface of the pavement when the roller is subsequently pressed and the finishing accuracy deteriorates. Further, there is a problem in that the unevenness of the material density immediately after laying out appears as a difference in density after rolling, resulting in poor durability.

The present invention has been made in view of such an actual situation, and an object thereof is to provide a pavement leveling device capable of sufficiently compacting and piling even a deep pavement even when laying a thick pavement. And

<Means for Solving the Problems> Therefore, the present invention provides a storage device for storing the pavement material, a transporting device for transporting the pavement material stored in the storage device, and a pavement material transported and supplied. In a vehicle provided with a spreading device for spreading in the vehicle width direction and a spreading and leveling device main body for leveling the spread paving material to a predetermined height, in a vehicle width direction in front of the leveling device main body. An elevating member that is extended and arranged to ascend and descend so as to come into contact with the spread paving material, and a plurality of protrusions that project from the lower end surface of the elevating member and are arranged at predetermined intervals in the vehicle width direction. , Is provided.

<Operation> After the paving material thus laid out is compacted by elevating and lowering the elevating member and the protrusions, the paver material is laid at a predetermined height by the laying device main body.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show a first embodiment of the present invention.

In FIG. 1, a vehicle main body 11 is provided with front wheels 12 and rear wheels 13, and a hopper 14 as a storage device for storing various paving materials is provided in the front part of the vehicle main body 11. A bar conveyor 15 is provided as a conveying device for conveying and supplying the paving material stored in the hopper 14, and the conveyor 15 conveys and supplies the paving material onto a base A at the rear of the vehicle. At the exit of the hopper 14, a gate 16 for adjusting the discharge amount (conveyance amount) of the paving material is provided.

Front ends of leveling arms 17 are swingably attached to a substantially vertical plane on both sides of the vehicle body 11, and the leveling arms 17 are slidably driven by hydraulic cylinders (not shown). There is. A screw feeder 18 as a leveling device is attached to the rear portion of the leveling arm 17 so as to extend in the vehicle width direction. The screw feeder
The 18 is composed of a rotating shaft extending in the vehicle width direction, with blades formed in a spiral shape which are opposite to each other from the central part to the lateral direction. It is designed to be laid out.

A deflector 19 is attached to the leveling arm 17 behind the screw feeder 18 so as to extend in the vehicle width direction. Further, a plate-like tamper 20 as an elevating member is extended in the vehicle width direction behind the deflector 19 and a plurality of tampers 20 are attached to the leveling arm 17, and these tampers 20 are alternately driven up and down by an elevating device (not shown). . Plural projections 21 projecting downward are attached to the lower end surfaces of these tampers 20 at predetermined intervals in the vehicle width direction.

Further, a screed 22 as a spreader main body is provided behind the tamper 20 so as to extend in the vehicle width direction and is attached to the leveling arm 17, and the screed 22 is oscillated by a vibrator 23.

In FIG. 1, 24 is a driver's seat and 25 is a spread thickness adjusting device.

According to this configuration, while spreading the pavement material conveyed and supplied from the hopper 14 by the bar conveyor 15 in the vehicle width direction by the screw feeder 18 while moving the vehicle forward, the spread pavement material is moved downward by the deflector 19. Press. Then, the tamper 20 is moved up and down together with the protrusions 21 to compact the pavement material. Further, the pavement material is spread to a predetermined height by the screed 22 in order to secure compaction and flatness of the pavement material. At this time, since a plurality of protrusions 21 are provided on the lower end surface of the tamper 20, since these protrusions 21 enter the pavement material,
The pavement material can be densely compacted to a deep layer, and thus thick layers can be compacted and spread to a deep layer.

4 and 5 show a second embodiment of the present invention. In the following embodiments, the same elements as those in the first embodiment are designated by the same reference numerals as those in FIG. 2 and their description is omitted.

In FIG. 4, a plurality of press creeds 31 are extended between the tamper 20 and the screeds 22 in the vehicle width direction, and a plurality of them are attached.
The press creed 31 is alternately moved up and down. Further, the lower end surface of the press creed 31 is formed with a predetermined attack angle α with respect to the horizontal plane so that the front side of the vehicle becomes higher.

According to this structure, since the intermediate layer of the pavement material compacted by the tamper 20 and the protrusion 21 is further compacted by the press creed 31, the pavement material can be sufficiently compacted to a deep layer by the first embodiment. .

FIG. 6 shows a third embodiment of the present invention.

In the present embodiment, in addition to the second embodiment, a plurality of second tampers 41 are located behind the tamper 20 and slightly below the tamper 20, and a plurality of second tampers 41 are arranged in the vehicle width direction. It is designed to move up and down alternately. A plurality of second protrusions 42 are attached to the lower end surface of the second tamper 41 at predetermined intervals in the vehicle width direction.

In addition, a plurality of second pre-creeds 43 are provided between the pre-creeds 31 and the screeds 22 so as to extend in the vehicle width direction, and the second pre-creeds 43 are alternately moved up and down. Further, an attack angle β smaller than the attack angle α of the press creed 31 is formed on the lower end surface of the second press creed 43.

According to this structure, the pavement can be sufficiently compacted and laid down to a deeper level than in the second embodiment.

<Effects of the Invention> As described above, the present invention has the paving material spread on the elevating member and a plurality of protrusions which are protruded from the lower end surface of the elevating member and arranged at predetermined intervals in the vehicle width direction. After the compaction is performed by the method described above, the main body of the flattening device is used to perform the flattening. Therefore, even when the thick pavement is flattened, the pavement can be sufficiently compacted to a deep layer with high density.

[Brief description of drawings]

FIG. 1 is an overall view showing a first embodiment of the present invention, FIG. 2 is an enlarged view of an essential part of the same, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a second embodiment of the present invention. FIG. 5 is an enlarged view of an essential part, FIG. 5 is a side view of FIG. 4, FIG. 6 is an enlarged view of an essential part of a third embodiment of the present invention, and FIG. 7 is an essential part of an example of a conventional leveling device. Enlarged view,
FIG. 8 is an enlarged view of a main part of another conventional example, FIG. 9 is an enlarged view of a main part of another conventional example, and FIG. 10 is an enlarged view of a main part of another conventional example. 11 ... Vehicle main body, 14 ... Hopper, 15 ... Bar conveyor, 18 ... Screw feeder, 20 ... Tamper, 21 ... Protrusion, 22 ... Screed

Claims (1)

[Scope of utility model registration request] 1. A storage device for storing paving material, a conveying device for conveying and supplying the paving material stored in the storage device, and a spreader for spreading the conveyed and supplied paving material in the vehicle width direction.
In a leveling device for a pavement provided on a vehicle, a leveling device main body for leveling the spread paving material to a predetermined height, and disposed in front of the leveling device main body in the vehicle width direction. And an elevating member that moves up and down to come into contact with the spread paving material, and a plurality of protrusions that project from the lower end surface of the elevating member and are arranged at predetermined intervals in the vehicle width direction. Characterizing pavement leveling device.