JPH0535128Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an asphalt finisher used for road paving.

[Prior Art] Generally, as an asphalt finisher used for road paving, one having the structure shown in FIG. 3, for example, is known.

This asphalt finisher 1 charges asphalt mixture into a hopper 3 provided at the front of a traveling vehicle body 2, and while the traveling vehicle body 2 travels, the asphalt mixture is transferred to a bar feeder 4.
The asphalt mixture is fed to the screw feeder 5 at the rear of the traveling vehicle body 2, and the screw feeder 5 distributes and spreads the asphalt mixture uniformly in the width direction of the road. The road is paved by compacting the asphalt mixture using a screed 6 provided at the rear of the vehicle body 2.

By the way, in the asphalt finisher 1 having the above-described configuration, since the length of the screw feeder 5 is constant, the spreading width of the asphalt mixture is restricted, and the spreading width corresponding to changes in the width of the road is limited. There is a problem where changes cannot be made.

On the other hand, the applicant of the present application previously proposed a technique for solving the above-mentioned problems in Utility Model Application No. 61-200847.

As shown in FIG. 4, this asphalt finisher includes a front screw feeder 8 located at the rear of the vehicle body 2 along the width direction of the vehicle body 2, and a front screw feeder 8 located behind the front screw feeder 8. A pair of left and right rear screw feeders 9 are provided, and each of these screw feeders 8 and 9 is connected to a drive mechanism 1.
0 and 11, and move both rear screw feeders 9 in their length direction to adjust the amount of protrusion from the side of the traveling vehicle body 2, thereby controlling the spreading width of the asphalt mixture. It is designed to change according to changes in the width of the road.

[Problem to be solved by the invention] However, in the asphalt finisher shown in FIG.
The drive mechanism 11 for the front screw feeder 8
Since the asphalt mixture is provided at a position away from the outer end toward the side of the traveling vehicle body 2, the flow of asphalt mixture fed by the rear screw feeder 9 is stagnated at this drive mechanism 11. It is expected that this will occur, and countermeasures are desired.

The present invention aims to solve such problems.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention provides an asphalt finisher in which a screw feeder is provided at the rear of a traveling vehicle body to spread asphalt composite material in the width direction of the road. , the screw feeder includes a front screw feeder arranged along the width direction of the traveling vehicle body, and a pair of left and right rear screw feeders arranged behind the front screw feeder. Each of these screw feeders is connected to a drive mechanism that rotates them independently, and the drive mechanism for the rear screw feeder rotates the front screw feeder. It is located at a position where it can be moved within the overlapping range, and the rear screw feeder is also equipped with a blade integrally attached to the inner end to loosen the asphalt mixture between them. shall be.

[Function] The asphalt finisher according to the present invention has the following functions:
With the above-described configuration, the asphalt mixture near the drive mechanism for the rear screw feeder is fed by the front screw feeder,
This is to smooth the flow of asphalt mixture around this drive mechanism. In addition, when the rear screw feeders move toward each other, the asphalt mixture existing between them is scraped down by the blades provided at the ends of each rear screw feeder, thereby further Smooth movement of both rear screw feeders is ensured.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

First, the basic structure of the asphalt finisher shown in this embodiment will be explained.

This asphalt finisher 20 is attached to the rear of the traveling vehicle body 21, and distributes the asphalt mixture in the width direction of the road and spreads the screw feeder S uniformly on the road.
A pair of front screw feeders Sf, Sf coaxially arranged along the width direction, and a pair of left and right rear parts coaxially arranged behind the front screw feeders Sf, Sf. It is composed of screw feeders Sr and Sr, and each of these screw feeders Sf and
Drive mechanism 2 that rotates these independently in Sf
2, 22a, and 22b are arranged in series, and a drive mechanism 22b for the rear screw feeder Sr is provided at a position where it can be moved within a range overlapping with the front screw feeder Sf.

Next, to explain these details, each of the front screw feeders Sf is formed to have a length approximately half the width of the traveling vehicle body 21, as shown in FIG. The bar feeder 25 is rotatably supported by a plurality of support members 24 provided on the support plate 23 of the vehicle body 21, and is opposed to the material outlet of a pair of bar feeders 25 for supplying asphalt material provided on the traveling vehicle body 21. ing.

On the other hand, a chain sprocket 26 is integrally attached to one end of each of the front screw feeders Sf, Sf (the end on the center side of the traveling vehicle body 21).
A chain 27 for power transmission is wound around.

Above these front screw feeders Sf, Sf, a drive motor 28 as the drive mechanism 22a for rotating these is connected to the support plate 23 in the vertical direction. Fixing bolt 29 inserted into the long hole along
It is fixed by. In addition, each drive motor 2
A position adjustment mechanism 30 consisting of a bolt and a double nut is provided between the support plate 8 and the support plate 23, and in cooperation with the fixing bolt 29, vertical position adjustment is possible.

Chain sprockets 31 are attached to the output shafts of these drive motors 28, and each chain 27 is wound around each chain sprocket 31, and each front screw feeder Sf.
It is designed to transmit rotational force to SF.

And these front Screwida Sf
One of them is the vehicle body 21 running on asphalt composite material.
Convey from the widthwise center to the left side, and
The rotation direction of the other side is set so that the asphalt mixture is conveyed to the right side of the traveling vehicle body 21, and in this embodiment, as shown in FIG. It is made with a rotation of direction.

The rear screw feeders Sr and Sr are arranged parallel to the front screw feeders Sf and Sf, and the conveyance directions of the rear screw feeders Sr and Sr are parallel to the front screw feeders Sf and Sf, respectively. - The direction of rotation is set to be the same direction as the conveyance direction of Sf, and in this embodiment, as shown in FIG. 2, the rotation is clockwise when viewed from the right side of the traveling vehicle body 21.

The drive mechanism 22b is connected to the end of the rear screw feeders Sr and Sr located on the center side of the traveling vehicle body 21, and the support arm 32 is rotatably attached to the other end. ing.

Further, the drive mechanism 22b and the support arm 32 are fixed to the same elevating plate 33, and the movable plate 33 is connected to a pair of guide rails 3 attached to the support plate 23 in the horizontal direction.
It is fixed via a fixing bolt 36 to a movable member 35 that is slidably fitted between the two parts.

The movable member 35 has an elongated hole 37 formed in the vertical direction through which the fixing bolt 36 is inserted.
Further, a position adjustment mechanism 38 consisting of a bolt and a double nut is provided between the movable member 35 and the elevating plate 33, so that the elevating plate 33
3, the position of the movable member 35 in the vertical direction is adjusted.

Further, between the guide rail 34 and the movable member 35, an actuator 3 such as a fluid pressure cylinder is provided.
9 is attached along the guide rail 34, that is, along the width direction of the traveling vehicle body 2, and this actuator 39 causes the rear screw feeder Sr to reciprocate in the above-mentioned direction together with the movable member 35. It's getting old.

Furthermore, in this embodiment, as shown in FIG.
0 is arranged, and both rear screw feeders
A blade 42 is integrally attached to the inner end of the Sr to loosen the asphalt mixture dropped between them.

This drive shaft 40 has a chain sprocket 41.
are integrally provided, the bar feeder 25 is wound around the chain sprocket 41, and the chain 27, which is wound around the drive motor 28 and the front screw feeder Sf, is wound around the chain sprocket 41. , and the front screw feeder Sf are simultaneously rotated by the drive motor 28.

Next, the operation of the asphalt finisher 20 of this embodiment configured as described above will be explained as follows.

On the road to be paved, the traveling vehicle body 21
By running the bar feeder 25, the front screw feeder Sf and the rear screw feeder Sr by driving each drive mechanism 22.
Rotate.

If the width to which the asphalt mixture should be spread is the entire length of both front screw feeders Sf and Sf,
Vehicle body 2 running on each rear screw feeder Sr/Sf
1, and superimpose it over the entire length of each of the front screw feeders Sf and Sf.

The flow of asphalt mixture in such a setting is as follows.

The asphalt mixture conveyed from the hopper to the rear of the traveling vehicle body 21 by the bar feeder 25 is supplied to the insides of both front screw feeders Sf.

The asphalt mixture thus supplied is spread toward both sides in the width direction of the traveling vehicle body 21 by the front screw feeders Sf, Sf, or is sent to the rear screw feeders Sr, Sr side. After this rear screwdriver Sr.
By being spread to both sides of the traveling vehicle body 21, it is spread uniformly on the road.

Here, since the drive mechanism 22b of the rear screw feeder Sr is superimposed on the front screw feeder Sf, the asphalt mixture near the drive mechanism 22b is
Since it is diffused by Sf, the smooth flow of the asphalt mixture around the drive mechanism 22b for the rear screw feeder Sr is ensured.

Further, the conveyance direction of each front screw feeder Sf, Sf and the conveyance direction of rear screw feeder Sr, Sr are set in the same direction on both sides of the center line in the width direction of the traveling vehicle body 21. Because there is
Even when the two are completely overlapped, the conveyance direction of both is the same on each of the left and right sides of the traveling vehicle body 21, and the flow of the asphalt mixture is caused to flow on each of the left and right sides of the traveling vehicle body 21. As shown by arrows C and D in FIG. 1, the trajectory is almost single.

Therefore, the asphalt mixture is transported smoothly, and the asphalt mixture is prevented from accumulating in the overlapping portion of the front screw feeder Sf and the rear screw feeder Sr, and the front screw By reducing the rotational resistance of the feeder Sf and rear screw feeder Sr, the power required for driving can be reduced.

On the other hand, when changing the spreading width of the asphalt mixture due to a change in the width of the road, etc., the actuator 39 moves each of the rear screw feeders Sr and Sr individually, and these traveling vehicle bodies 2 This can be dealt with by adjusting the amount of protrusion toward the sides.

When the rear screw feeders Sr and Sr are made to protrude to the side of the traveling vehicle body 21 in this way, the amount of overlap with the front screw feeders Sf and Sf changes. Even if the drive mechanism 22b for the rear screw feeder Sr and the front screw feeder Sf are always overlapped, the flow of the asphalt mixture around the drive mechanism 22b is obstructed. Smooth asphalt mixture spreading operation is maintained without any problems.

In addition, in this embodiment, in particular, when the rear screw feeders Sr and Sr move in the direction toward each other, the asphalt mixture existing between them is removed from the asphalt material provided at the end of each rear screw feeder. By scraping with the blades 42, smooth movement of both rear screw feeders Sr and Sr is ensured.

Furthermore, depending on the thickness of the pavement, the height of the rear screw feeders Sr and Sr relative to the front screw feeders Sf and Sf can be adjusted using the fixing bolts 36 and the position adjustment mechanism 38 to improve the finished surface. can be improved, and the rear screw feeder can be improved.
The transport resistance of Sr/Sr is reduced.

It should be noted that the shapes and detailed dimensions of each component shown in the above embodiments are merely examples.
Various changes can be made based on changes in the shape or design requirements.

[Effects of the invention] As explained above, the asphalt finisher according to the invention replaces the screw feeder provided at the rear of the vehicle body with the front screw feeder disposed along the width direction of the vehicle body. and a pair of left and right rear screw feeders arranged behind this front screw feeder, and each of these screw feeders is provided with a drive mechanism that rotates them independently. At the same time, a drive mechanism for the rear screw feeder is provided at a position where it can be moved within the range overlapping with the front screw feeder, and a drive mechanism for the rear screw feeder is provided at the inner end of the rear screw feeder. The drive mechanism for the rear screw feeders can be used regardless of the movement position of each rear screw feeder in the width direction of the vehicle body. is held in a position overlapping with the front screw feeder, thereby smoothing the flow of the asphalt mixture around the drive mechanism for the rear screw feeder and ensuring good dispersion of the asphalt mixture. be able to.

In addition, by integrally attaching blades to the inner ends of the rear screw feeders to loosen the asphalt mixture between them, the blades rotate when the rear screw feeders move toward each other. can scrape up the asphalt mixture existing between the two, further ensuring smooth movement of both rear screw feeders and ensuring thorough dispersion of the asphalt mixture.

[Brief explanation of the drawing]

In the drawings, FIGS. 1 and 2 show one embodiment of the present invention, and FIG. 1 is a front view of the main parts seen from the rear of the vehicle body, and FIG. 2 is a diagram taken along the - line in FIG. 3 is a side view showing an example of a conventional asphalt finisher, and FIG. 4 is a view similar to FIG. 1 showing an asphalt finisher according to an earlier proposal by the applicant of the present invention. be. 20... Asphalt Finish, 21...
Traveling vehicle body, 22a... drive mechanism (for front screw feeder), 22b... drive mechanism (for rear screw feeder), Sf... front screw feeder, Sr... rear screw feeder .

Claims (1)

[Scope of Claim for Utility Model Registration] In an asphalt finisher in which a screw feeder is provided at the rear of a traveling vehicle body to spread asphalt mixture in the width direction of the road, the screw feeder extends in the width direction of the traveling vehicle body. a front screw feeder disposed along the
It consists of a pair of left and right rear screw feeders arranged behind this front screw feeder, and each of these screw feeders is connected with a drive mechanism that rotates them independently. and a drive mechanism for the rear screw feeder is provided at a position where it can be moved within the range of overlapping the front screw feeder, and further,
An asphalt finisher characterized in that a blade is integrally attached to the inner end of the rear screw feeder to loosen the asphalt mixture between them.