JPH0721605Y2 - 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 a leveling technique for a thick pavement.

<Conventional technology> Conventionally, the leveling device used for leveling paving materials such as asphalt and cement has a limit of 15 to 20 cm as the maximum thickness immediately after leveling. It is 10 to 15 cm. For this reason, when laying a 20-30 cm thick layer pavement, it is laid down a plurality of times and spread by a predetermined thickness.

<Problems to be solved by the invention> However, when the thick layer pavement is laid in a plurality of times and peeled off, peeling may occur at the joints thereof,
There is a problem that it is inferior in economic efficiency and high in cost.

Further, when the thickening pavement is spread by simply modifying the spreader, there are the following problems. That is, when various pavement materials are spread in the vehicle width direction by a screw spreader, coarse aggregate in the pavement material is easily separated, which causes a problem that the quality of the pavement material is deteriorated. In addition, since the spread layer is thick, the thickness after rolling is not constant and the flatness is deteriorated. In addition, the density after rolling is lower in the lower layer.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pavement laying apparatus capable of sufficiently laying a deep pavement even in a thick pavement.

<Means for Solving the Problem> Therefore, according to the present invention, the storage device for storing the pavement material, the transport device for transporting the stored pavement material, and the transport device for continuously transporting and supplying the pavement material are stored. A screw spreader that is rotatably driven so as to spread the paving material in the width direction of the vehicle and to hold the paving material forward, and a leveling device that is disposed behind the screw spreader and spreads the paving material spread to a predetermined height. In a leveling device for a pavement that includes a main body and a vehicle,
The screw spreader is arranged to extend in the vehicle width direction in front of the screw spreader, and the lower end thereof is lower than the leveling surface of the leveling device body, and is 1/2 to 1 of the leveling thickness of the leveling device body. A guide member located at a height of / 3 is provided so that the paving material that is being continuously conveyed and supplied by the conveying device is stored between the guide member and the screw spreader to a position substantially above the screw spreader. On the other hand, the guide is provided at the rear of the guide member and is driven up and down to continuously compact the pavement material stored between the guide member and the screw spreader to a position substantially above the screw spreader. A tamper is provided below the member.

<Operation> In such a configuration, the paving material is continuously conveyed and supplied from the storage device by the conveying device, is spread in the vehicle width direction by the screw spreader that is rotationally driven, and is held in front of the screw spreader, and is guided. Between the member and the screw spreader is stored up to a substantially upper position of the screw spreader, and the stored pavement material is
It is sent below the guide member while being continuously compacted by the tamper. The pavement material left between the guide member and the screw spreader is spread to a predetermined height by the spreader main body.

Since the paving material is continuously conveyed and supplied between the guide member and the screw spreader by the conveying device, the paving material is always stored between the guide member and the screw spreader to a position substantially above the screw spreader. , Is continuously supplied below the guide member and constantly flows below the tamper as the spreader main body moves.

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

In FIG. 1, a crawler type traveling wheel 2 is attached to a lower portion of a vehicle body 1, and a hopper 3 as a storage device for storing various pavement materials is attached to a front portion of the vehicle body 1.

A front end of a leveling arm 4 is swingably attached to both sides of the vehicle body 1 in a substantially vertical plane, and these leveling arms 4 are swingably driven by a hydraulic cylinder 5. At the rear part of the leveling arm 4, a screw spreader 6 as a spreader is attached so as to extend in the vehicle width direction. This screw spreader 6 has spiral blades attached to the rotary shaft extending in the vehicle width direction in opposite directions from the central portion to the side portions, and spreads the paving material from the central portion to both sides. And it is driven to rotate so that it can be held forward.

A screed 7 as a main body of the leveling device is attached to the leveling arm 4 so as to be positioned behind the screw spreader 6. As shown in FIG. 2, plate-shaped end plates 8 are attached to both sides of the screed 7 so as to extend in the vehicle front-rear direction, and a vibrator 9 is attached to the end plates 8 to enable vibration. ing.

A plate-shaped first guide member 10 is located in front of the screw spreader 6 and is attached to the leveling arm 4 so as to extend in the vehicle width direction. As shown in FIG. 3, a plate-shaped first tamper 11 is disposed on the first guide member 10 behind the first guide member 10 so as to be vertically movable so as to extend in the vehicle width direction. . The first tamper 11
Is driven by the first drive device 12 and can move up and down 700 to 1400 times per minute with a stroke of 4 to 10 mm.

Also, plate-shaped second and third guide members 13 and 14 are attached to the front end portions of the respective end plates 8 so as to be positioned in front of the first guide member 10. The plate-shaped second members 13 and 14 are the same as the first guide member 10.
Also, a third tamper (not shown) is attached so as to be vertically movable so as to extend in the vehicle width direction. The second and third tampers are driven by the second and third drive devices 15 and 16 to move up and down.

Between the screw spreader 6 and the screed 7, a fourth tamper 17 is installed extending in the vehicle width direction as shown in FIG. 3, and the fourth tamper 17 is driven by a drive device (not shown) to move up and down. It is supposed to do.

Here, the first to third guide members 10, 13, 14 and the first damper 1
The lower end portions of the first, second and third tampers are located below the leveling surface of the screed 7 as shown in FIG. 3, and are 1/2 to 1/3 of the leveling thickness d of the screed 7. It is arranged so as to be located at the height.

Further, the vehicle main body 1 is provided with a bar conveyor 21 (see FIG. 3) as a conveying device that conveys the paving material stored in the hopper 3 to the screw spreader 6.

In addition, 18 is a spread thickness adjusting device, 19 is a driver's seat, 20 is an engine, and 21 is a step.

Next, the operation will be described.

As shown in FIG. 3, after supplying various paving materials to the hopper 3 from a truck such as a dump truck 22 ...
The bar conveyor 21 continuously conveys and supplies the paving material to the screw spreader 6. Then, the pavement material is spread on both sides of the vehicle and held in front by the screw spreader 6. At this time, since the first to third guide members 10, 13 and 14 are provided in front of the screw spreader 6 with their lower ends located below the leveling surface of the screed 7, the paving material is used as the pavement material. Since it is located up to the upper part of the pavement, it is possible to spread the pavement in the vehicle width direction and hold it forward while preventing the coarse aggregate of the pavement from being separated.

The paving material is stored between the first to third guide members 10, 13, 14 and the screw spreader 6, and the stored paving material is tightened by the first tamper 11, the second tamper and the third tamper. While being solidified, it is sent below the first to third guide members 10, 13, and 14. The paving material left between the first to third guide members 10, 13 and 14 and the screw spreader 6 is the screed 7
Are laid down to a predetermined height.

In this case, the first tamper 11, the second tamper, and the third tamper, after the pavement material of 1/2 to 1/3 of the spread average thickness d is first compacted,
The paving material in the upper layer is the fourth tamper 17 and the screed 7.
Since it can be spread evenly to a deep layer, it can be compacted to a sufficient and substantially uniform density, and the spreading work by the screed 7 can be stabilized, and the flatness after rolling can be improved.

Further, since the vibrator 9 is attached to the end plate 8, the pavement material can be sufficiently compacted even at the end portion where the compaction shortage has conventionally occurred.

The pavement material is continuously conveyed and supplied between the first guide member 10 and the screw spreader 6 by the bar conveyor 21, while the pavement material is provided between the first guide member 10 and the screw spreader 6 at a substantially upper position of the screw spreader 6. The pavement material is continuously supplied below the first guide member 10 as the screed 7 moves, and the first tampering is performed.
Always flows under 11.

<Effects of the Invention> As described above, the present invention is arranged in front of the screw spreader so as to extend in the vehicle width direction, and the lower end thereof is below the leveling surface of the leveling device body. A guide member located at a height of 1/2 to 1/3 of the spread thickness of the leveling device main body is provided, and the paving material is continuously transported and supplied by the transport device while the guide member and the screw spreader are being supplied. Between the guide member and the screw spreader up to a substantially upper position of the screw spreader between the guide member and the screw spreader. Since a tamper for sending the stored pavement material to the lower part of the guide member while compacting it is provided, the pavement material is located almost above the screw spreader, so that the coarse aggregate of the pavement material is separated. It is possible to spread the pavement material in the vehicle width direction while preventing this, and even in the case of a thick pavement, it is possible to compact to a deep layer with a sufficient and substantially uniform density by just running once. The flatness of can also be improved.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a plan view of relevant parts of the same, and FIG. 3 is a view for explaining the operation of the same. 3 ... Hopper, 6 ... Screw spreader, 7 ... Screed, 10 ... First guide member, 11 ... First tamper, 13 ... Second guide member, 14 ... Third guide member

Claims (1)

[Scope of utility model registration request] 1. A storage device for storing paving material, a conveying device for conveying the stored paving material, and a paving material continuously conveyed and supplied by the conveying device laid in a vehicle width direction and forward. And a screw spreader that is driven to rotate so as to be held in, and disposed behind the screw spreader,
In a leveling device for a pavement provided with a vehicle, a leveling device main body for leveling the spread pavement material to a predetermined height, and extending in the vehicle width direction in front of the screw spreader and arranged at the lower end. Part is below the leveling surface of the leveling device body,
A guide member positioned at a height of 1/2 to 1/3 of the spread thickness of the spreader main body is provided, and the paving material that is being continuously conveyed and supplied by the conveying device is the guide member and the While being configured to store up to a substantially upper position of the screw spreader with the screw spreader, it is provided at the rear of the guide member and driven to move up and down, and substantially above the screw spreader between the guide member and the screw spreader. A pavement leveling apparatus, comprising a tamper for continuously compacting the pavement material stored up to a position and feeding it below the guide member.