JPH08284109A - Asphalt finisher - Google Patents

Abstract

PURPOSE: To enable spreading by surely discharging grease asphalt having high fluidity at the place of paving. CONSTITUTION: In an asphalt finisher uniformly spreading an asphalt mixture A fed on a subbase course G in specified paving width and spreading and levelling the asphalt mixture A in fixed thickness, a base edge 14a is connected to the lower edge of the discharge opening 12 of a feeder continuously discharging grease asphalt A onto the subbase course G, and the finisher has a guide skirt 14, which is extended to the lower section of a vertically movable screw spreader 5 disposed adjacently to the discharge opening 12 and in which a front edge 14b is mounted slantingly in the direction of the angle of depression so as to be brought near to the subbase course G. The guide skirt 14 is coupled with the screw spreader 5 while the base edge 14a is supported pivotally at the lower edge of the discharge opening 12 through a support shaft 15, and the front edge 14b side is rotated freely so as to be lifted and lowered while being interlocked with the vertical movement of the screw spreader 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt finisher in which a supplied asphalt mixture is evenly spread on a roadbed with a predetermined pave width and then spread to a specified thickness, and in particular, a goose having fluidity is used. The present invention relates to an asphalt finisher using asphalt.

[0002]

2. Description of the Related Art The surface of a road bridge is a goose asphalt pavement that has abrasion resistance, water impermeability and flexibility in order to provide a pavement surface that can withstand impacts due to traffic loads and repeated bending stress. Is applied. This goose asphalt has a higher fluidity during pavement than the asphalt used for ordinary pavement roads, and is heated and mixed by an asphalt cooker car during pavement construction. It is supplied to a special asphalt finisher, and by utilizing this fluidity, it is poured onto a roadbed made of steel floor and laid flat.

[0003]

However, in the above-described conventional asphalt finisher, since the asphalt to be treated is a highly fluid goose asphalt, when it is discharged from the discharge port to the roadbed by the feeder,
Goose asphalt released as the car progresses,
It flows not only to the rear of the traveling direction, but also to the same direction as the traveling direction of the asphalt finisher itself, that is, to the lower part of the vehicle body which is the front, and there is a problem in spreading in the width direction by the screw spreader behind the discharge port. However, there is a drawback that the tamper or screed located further rearward of the screw spreader also causes a problem in the laying action.

Therefore, a regulating member is provided at the lower edge of the feeder discharge port such that a rubber plate is hung so as to come into contact with the roadbed or chains are hung in the width direction so as to prevent the asphalt from moving forward. Although it was configured to prevent spillage, there was the problem that it could not be completely prevented due to the excellent fluidity of goose asphalt.

Therefore, in order to solve the above problems, the present invention provides an asphalt finisher capable of reliably discharging and spreading the asphalt material to a pavement position when handling a highly fluid goose asphalt. Is intended.

[0006]

Means for achieving the above object will be described below with reference to the drawings corresponding to the embodiments. The asphalt finisher 1 of the present invention is an asphalt finisher in which a supplied asphalt mixture A is spread evenly on a roadbed G with a predetermined paving width and then spread to a predetermined thickness. The base end edge 14a is connected to the lower edge of the discharge port 12 of the feeder 4 that continuously discharges the oil to the roadbed G, and extends below the vertically movable screw spreader 5 disposed near the discharge port 12. The guide skirt 14 is provided so that the leading edge 14b is provided so as to be inclined so as to approach the roadbed G.

The guide skirt 14 is connected to the screw spreader 5 and the base edge 1
4a may be pivotally supported on the lower edge of the discharge port 12, and the tip edge 14b side may be vertically movable in association with the vertical movement of the screw spreader 5.

[0008]

The asphalt mixture A, such as goose asphalt, discharged from the feeder 4 is discharged onto the guide skirt 14 which is inclined at the lower edge of the discharge port 12 of the feeder 4. On the guide skirt 14, the goose asphalt A is moved to the vehicle body 1 by the screw spreader 5.
1 is spread and widened in the left-right width direction. Then, the goose asphalt A flows along the inclination of the guide skirt 14 and is laid on the roadbed G from the tip edge 14b side of the guide skirt 14.

[0009]

1 is a side view showing an embodiment of an asphalt finisher according to the present invention, FIG. 2 is a plan view of an asphalt finisher according to the same embodiment, and FIG. 3 is a side view showing a main part of the asphalt finisher according to the same embodiment. Is.
As shown in FIG. 1 and FIG. 2, this asphalt finisher 1 spreads a series of conveying parts 2 for moving the asphalt mixture of the hopper 3, the feeder 4 and the spreader 5 and the asphalt mixture of the tamper 7 and the screed 8. The vehicle body 11 is provided with a laying-out section 6, a drive section (not shown) for driving each of these sections, and a traveling section 9 provided with a wheel 10.

As shown in FIG. 1, the hopper 3 of the transport section 2 is provided on the front end side 11a of the vehicle body 11 and has an open upper part. Inside the hopper 3, an asphalt cooker vehicle (not shown) is provided. The asphalt mix transported by, namely goose asphalt, is always supplied.

Next, from the bottom of the hopper 3, the vehicle body 11
In the present embodiment, as shown in FIG. 2, the feeder 4 extending to the rear end 11b is composed of two screws spirally formed in opposite directions and rotating in opposite directions. The goose asphalt supplied to the vehicle is continuously conveyed to the rear (11b) of the vehicle body 11.

At the rear end 11b of the vehicle body 11, the feeder 4
The end portion of the shaft is pivotally supported and the discharge port 12 is formed so that the goose asphalt conveyed by the feeder 4 is discharged from the vehicle body 11 through the discharge port 12.

In addition, in the vicinity of the discharge port 12, the vehicle body 1
As shown in FIG. 2, a spreader 5 laterally provided in the rear portion of the vehicle 1 in the width direction of the vehicle body 11 in the left-right direction.
Is provided. The spreader 5 is formed in a screw shape, and the spiral directions are opposite to each other from the center.

The screw spreader 5 is
By rotating, the goose asphalt discharged from the discharge port 12 is distributed in the left-right direction around the discharge port 12 and spread, and spread evenly over the roadbed G to a predetermined pavement width. . The screw spreader 5 is provided with an up-and-down drive mechanism 13, and is provided on the vehicle body 11 so as to be lifted so as not to come into contact with the roadbed G at times other than during paving work.

Further, a guide skirt 14 is provided on the lower edge side of the discharge port 12 as shown in FIGS. 2 and 3. The guide skirt 14 is a strip-shaped plate-shaped member formed to have a length substantially equal to the width of the screw spreader 5, and the base end edge 14 a, which is one long side edge, is located on the lower edge side of the discharge port 12. Is rotatably connected to a rear end 11b of the vehicle body 11 via a support shaft 15, is arranged so as to extend below the screw spreader 5, and has a tip edge 14b serving as a swing end. It is provided so as to be inclined toward the depression direction so as to approach the roadbed G. The guide skirt 14 is connected to the above-described screw spreader 5 via a bracket (not shown) or the like, and is interlocked when the screw spreader 5 is lifted so as to swing so that the tip edge 14b side rises. Has become.

Further, the leveling part 6 is provided at the rear of the screw spreader 5 and, as shown in FIG. 1, a pair of leveling arms whose base ends are pivotally supported on both left and right sides of the vehicle body 11. It is provided so as to be bridged between the respective tips of 16.

The tamper 7 and the screed 8 constituting the laying-out portion 6 are for moving the goose asphalt A spread on the roadbed G in the width direction by the screw spreader 5 to have a uniform thickness. Tamper 7
The asphalt A is compacted and heated by the screed 8 for finishing.

As shown in FIG. 3, a jack mechanism 17 is interposed and connected to the vehicle body 11 at the laying-out portion 6, and the thickness of the asphalt A to be laid is determined by the jack mechanism 17. The asphalt A spread while being finely adjusted by the jack mechanism 17 to a uniform thickness.
The surface of the is finished flat.

Therefore, according to the asphalt finisher 1 thus constructed, the goose asphalt A conveyed by the feeder 4 and discharged from the discharge port 12 is not directly discharged onto the roadbed G, but the asphalt A is discharged. Since the screw spreader 5 is once discharged onto the guide skirt 14, the asphalt A is laid on the roadbed after the screw spreader 5 is spread and spread to a predetermined width in the lateral width direction on the guide skirt 14.

That is, by the guide skirt 14,
The highly flowable goose asphalt A is spread in the left-right width direction by the screw spreader 5 while flowing down along the slope and approaches the roadbed G with the guide skirt 14.
On the tip edge 14b side, the asphalt A is spread over the entire width of the screw spreader 5, which is a predetermined width, and is spread on the roadbed G.

Further, since it is laid on the roadbed G along the inclined surface, the vehicle body 11 is driven by the momentum flowing along the inclined surface.
Therefore, the asphalt A does not flow out to the rear of the traveling direction, that is, in the direction of the screed 8, and to the front in the same direction as the traveling direction, that is, to the lower portion of the vehicle body 11 as in the conventional case.

Further, the spread of the goose asphalt A in the width direction due to the rotation of the screw spreader 5 is before it is spread on the roadbed G, and it is not possible to spread the asphalt discharged on the roadbed G left and right as in the conventional case. However, when it is spread in the width direction on the guide skirt 14 and flows out from the guide skirt 14 to the roadbed G, it is only in the direction of the outflow and is in the direction of the laying portion 6, so that it is uniform over the width direction. The asphalt A in the state is surely delivered to the screed 8 side.

In the above-mentioned embodiment, the example in which goose asphalt is used as the asphalt mixture A has been extended, but the present invention is not limited to this, and the above effect can be obtained when handling an asphalt mixture having high fluidity. be able to.

[0024]

As described above, in the asphalt finisher according to the present invention, the asphalt mixture carried by the feeder and discharged from the discharge port is not directly discharged onto the roadbed, but this asphalt mixture is used as a guide skirt. Since it is once released to the top, asphalt mixture is laid on the roadbed after the screw spreader spreads and spreads in the left-right width direction on this guide skirt. That is, the guide skirt has particularly high fluidity. When goose asphalt is used as an asphalt mixture, due to its fluidity, it spreads in the left-right width direction by the screw spreader while flowing down along the slope, and on the tip edge side of the guide skirt close to the roadbed, the entire width of the screw spreader With goose asphalt spread Gerare, there is an effect that is laid in the width of the screw spreader on roadbed.

Further, the spread of the goose asphalt in the width direction by the rotation of the screw spreader is before it is laid on the roadbed, and the asphalt discharged on the roadbed is not spread to the left and right as in the conventional case, but the guide skirt is spread. Since it is widened in the width direction on the top of the road, when it flows out from the guide skirt to the roadbed, it is only in the direction of the outflow, and it is in the rearward direction of the vehicle body. The effect is that it will be reliably delivered.

Further, since the asphalt is laid on the roadbed along the inclined surface of the guide skirt, the asphalt flows along the inclined surface in the backward direction of the vehicle body, that is, in the screed direction. As described above, the asphalt does not flow out to the front in the same direction as the traveling direction, that is, to the lower part of the vehicle body.

Further, since the base end edge of the guide skirt is pivotally supported on the lower edge of the discharge port and can be raised and lowered together with the screw spreader which can be raised and lowered, the guide skirt can be damaged when the finisher is moved other than during paving. In addition, there is an effect that the asphalt can be spread evenly because it can be lifted and lowered according to the condition of the roadbed.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an asphalt finisher according to the present invention.

FIG. 2 is a plan view of an asphalt finisher according to the same embodiment.

FIG. 3 is a side view showing an essential part of the asphalt finisher according to the embodiment.

[Explanation of symbols]

 1 ... Asphalt finisher 4 ... Feeder 5 ... Screw spreader 12 ... Discharge port 14 ... Guide skirt 14a ... Base edge 14b ... Tip edge A ... Asphalt mixture (goose asphalt) G ... Roadbed

Claims (2)

[Claims] 1. In an asphalt finisher in which the supplied asphalt mixture is spread evenly over a roadbed with a predetermined paving width and then spread to a predetermined thickness, a feeder that continuously discharges the asphalt mixture onto the roadbed. The base end edge is connected to the lower edge of the discharge port, extends below the vertically movable screw spreader disposed close to the discharge port, and the tip edge is inclined so as to approach the roadbed. An asphalt finisher having a guide skirt provided as described above. 2. The guide skirt is connected to the screw spreader, and a base end edge thereof is axially supported by a lower edge of the discharge port, and the tip end side can be lifted and lowered in association with the lifting and lowering of the screw spreader. The asphalt finisher according to claim 1, wherein: