JPH067043Y2 - Asphalt paving equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an asphalt pavement apparatus for pavement for compacting a surface layer.

[Prior Art] A conventional asphalt finisher is equipped with a tamping type compacting device for compacting coarse particles and thick layers, or a vibration type compacting device for compacting the surface layer of honey particles and asphalt. There is.

The vibration type compaction device is disclosed, for example, in Japanese Patent Publication No. 47-315.
As proposed in Japanese Patent Laid-Open No. 70-70, an eccentric bearing in which a rotatable eccentric bush is fixed to an eccentric shaft portion of a rotating main shaft supported by a screed frame, and an eccentric bush rotatably supports a tamper frame is provided. While fitting, attach a vibrating piece that can change the relative position to the rotating main shaft,
The tamper frame was vibrated with the rotation of the rotating main shaft.

[Problems to be Solved by the Invention] In the conventional technology, the tamper frame vibrates vertically to perform compaction. However, in such vertical vibration type compaction, compaction of asphalt is weak, In addition, the asphalt pavement surface had a relatively large number of traces of needle holes, and it was not possible to finish it beautifully.

To solve these problems, Japanese Patent Publication No. 61-5672
Japanese Patent Publication No. 4 discloses a vibrating machine of a compacting machine capable of efficiently compacting the asphalt material supplied on the road surface by vibrating the rolling wheels in a horizontal direction by a vibrating mechanism having an eccentric mass. ing.

However, a compaction machine with such a structure must spread the asphalt material on the road surface by using another flattening device before performing compaction work. It takes too much time for a series of operations, the construction period becomes long, and the construction cost becomes very high. In addition, since the temperature of the asphalt road surface gradually decreases during the compaction work, there is a drawback that the compaction becomes weak as a result.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an asphalt pavement apparatus capable of shortening the construction period from leveling to compaction and strengthening compaction.

[Means for Solving the Problems] The present invention provides a leveling portion for diffusing the paving material received in the receiving hopper to the left and right and uniformly supplying the paving material, and a heating device provided behind the leveling portion. With the screed body that you have integrally provided on the asphalt finisher body,
A horizontal vibration generator is connected to the screed plate of the screed body.

[Operation] By applying the screed plate to the paved road surface laid by the leveling section, the paving material on the road surface is heated by the heating device provided in the screed body, and in this state, the screed plate is generated by the horizontal vibration generator. By vibrating in the horizontal direction, the asphalt road surface is compacted.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a screed main body, which is connected to an asphalt finisher main body 4 by fastening its upper portion to a screed arm 3 whose front portion is axially attached to a side plate 2A of an endless track 2 with some play. . Reference numeral 5 denotes a pavement material receiving hopper, in which asphalt material is fed rearward by a feeder 6 provided at the bottom of the asphalt finisher body 4, and a screw constituting a leveling portion 22 attached to the rear part of the asphalt finisher body 4. Spreader 7 and blade 8 forming the front surface of the screed body 1
Thus, it is diffused to the left and right and is uniformly supplied to the screed body 1. The screed body 1 is provided behind the flattening portion 22, and the screed body 1 and the flattening portion 22 are provided integrally with the screed body 1. Reference numeral 9 is an operating lever, 10 is a driver's seat, and 11 is a towing tire.

In FIGS. 2 to 6, reference numeral 12 is a screed frame, a blade 8 is provided in the front portion, and a screed plate 14 for finishing a smooth asphalt surface heated by a heating device 13 such as a gas heater such as LPG or a ceramic heater is provided in the lower portion. .
The front end 14A of the screed plate 14 is formed in an arc shape.

Reference numeral 15 is a horizontal vibration generator in which a horizontal vibration element 16 is connected to a screed plate 14. This horizontal vibration generator 15 is an eccentric shaft attached to a rotary shaft 18A of a motor 18 such as hydraulic or electric provided on a support plate 17.
19 is provided, the eccentric shaft 19 is provided with an inner frame 20, and the horizontal vibration element 16 is fixed to the inner frame 20, and the horizontal vibration element 16 is connected to the screed plate 14. 21 is a mounting plate such as an iron plate.

Next, the operation of the above configuration will be described. Receiving hopper 5
The asphalt material received in the feeder is fed by the feeder 6, and the screw spreader 7 and the blade 8
Is diffused to the left and right to be evenly supplied and laid. The asphalt road surface laid after this is heated by a heating device 13
Is heated by the screed plate 14 that is horizontally vibrated by the horizontal vibration generator 15. That is, when the motor 18 is driven, the rotational force causes horizontal vibration via the eccentric shaft 19, and the horizontal vibration causes the inner frame 20, the horizontal vibrator 16,
The screed plate 14 of the screed body 1 via the mounting seat plate 21
Transmitted to and compacted. The amplitude of the horizontal vibration is 1 mm to 1/100 mm, for example, 5/100 mm, and the vibration frequency is 1000 rpm to 10000 rpm, for example, 5500 rpm.

Fig. 7 shows a comparison between the conventional compaction by vertical vibration and the compaction by horizontal vibration according to the present invention. The compaction rate is better. The table below compares the compaction temperature and compaction ratio, and it was found that there was almost no difference between longitudinal vibration and horizontal vibration.

Further, as shown in FIG. 8, when the sampling states are compared, in the horizontally vibrated sampling shown in FIG. 8 (A), there are few voids in the upper layer and on the surface there are few irregularities, while in the vertically vibrated sampling, the upper layer is It was found that there were relatively many voids and many irregularities on the surface.

As described above, in the above-described embodiment, the asphalt finisher main body 4 is provided with the leveling part 22 for diffusing the asphalt material received in the receiving hopper 5 to the left and right and uniformly supplying it, and the screed main body 1 having the heating device 13. By integrally providing the asphalt finisher body 4 with the asphalt finisher main body 4, it is possible to shorten the construction period and the construction cost. Moreover, since the asphalt material on the road surface is heated by the heating device 13 provided in the screed body 1, and in this state, horizontal vibration is immediately applied through the screed body 1, the compaction should be made extremely strong. Is possible. Further, by providing the screed plate 14 on the screed body 1 and connecting the horizontal vibration generator 15 to the screed plate 14, the compaction rate can be improved and the asphalt surface can be finished without unevenness.

Incidentally, the present invention is not limited to the above-mentioned embodiment, for example, it is not intended to lay only a new material, but it is used as an asphalt finisher to mix the scratched old material and new material and lay it again. Various modifications are possible. Further, one end of the horizontal vibration generator may be connected to the asphalt finisher body and the other end may be connected to the screed body. Further, although the horizontal vibration generator is directly connected to the screed plate in the embodiment, the horizontal vibration generator may be attached to a proper position of the screed body to indirectly give horizontal vibration. Further, instead of the vertical vibration device of the conventional hand-operated compaction device, a horizontal vibration generation device may be provided as in the above-described embodiment to be applied.

[Advantages of the Invention] The present invention provides a leveling portion for diffusing the paving material received in the receiving hopper to the left and right and uniformly supplying the paving material, and a screed main body provided behind the leveling portion and having a heating device. Is integrated with the asphalt finisher body,
A horizontal vibration generator is connected to the screed plate of the screed body, and it is possible to provide an asphalt pavement apparatus that can shorten the construction period from leveling to compaction and can strengthen compaction.

[Brief description of drawings]

1 is a front view, FIG. 2 is a cross-sectional view of a main part, FIG. 3 is a cutaway perspective view of the same portion, FIG. 4 is a flat cross-sectional view, FIG. Fig. 6 is a perspective view of the eccentric shaft, Fig. 7 (A) is a graph of the compaction ratio when the thickness is 3 cm, Fig. 7 (B) is a graph of the compaction ratio when the thickness is 5 cm, and Fig. 8 is the sampling. 8A is a cross-sectional view of horizontal vibration sampling, and FIG. 8B is a cross-sectional view of vertical vibration sampling. 1 ... Screed main body 4 ... Asphalt finisher main body 5 ... Receiving hopper 13 ... Heating device 14 ... Screed plate 15 ... Horizontal vibration generator 22 ... Leveling part

Claims (1)

[Scope of utility model registration request] 1. An asphalt finisher main body comprising a leveling section for diffusing the paving material received in a receiving hopper to the left and right to uniformly supply the paving material, and a screed body provided behind the leveling section and having a heating device. And a horizontal vibration generator connected to the screed plate of the screed body.