JP3468630B2 - Asphalt finisher - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt finisher used for laying heated asphalt at a desired thickness on an unpaved surface.

[0002]

2. Description of the Related Art FIGS. 1 and 2 are a plan view and a side view of a general asphalt finisher. In front of the body 1 which moves by wheels along the unpaved surface, is a hopper 2 for storing heated asphalt. To the hopper 2, the heated asphalt mixture is supplied from the outside of the asphalt finisher. The asphalt mix of hopper 2 is
It is conveyed backward by the conveying device 3 of the asphalt mixture supplying means and is supplied onto the unpaved surface. The asphalt mixture is spread by the spreader 4 installed at the rear of the main body 1.
It is expanded along the width direction of the unpaved surface that is orthogonal to the traveling direction of the main body 1. Behind the spreader 4, there is provided a screed 5 which is a leveling means for leveling the asphalt mixture to a predetermined thickness. Screed 5 is arm 6
Is connected to the main body 1 via. If the arm 6 is swung, the distance between the lower surface of the screed 5 and the unpaved surface can be set arbitrarily, and the thickness of the asphalt mixture laid can be set arbitrarily. On the outer surface side of this screed 5,
An end plate 7 is provided. End plate 7
Is substantially parallel to the moving direction of the main body 1 and corresponds to the width of asphalt laid on the unpaved surface, that is, the paving width.

[0003]

In the case of an ordinary asphalt mixture used for paving roads for general roads, it is 140-
It is shipped at a relatively low temperature of 170 ° C. for paving. The leveling of such an asphalt mixture can be performed by the above-described conventional asphalt finisher.
However, when an asphalt mixture used for pavement such as a highway requiring durability, for example, a goose asphalt mixture whose temperature at the time of laying is about 220 to 260 ° C. is used, The asphalt finisher could not be laid evenly. This is because the goose asphalt mixture has a relatively low viscosity at high temperatures when it is laid, so it easily spreads thinly, and when it comes in contact with low-temperature end plates, it cools and solidifies on the unpaved surface before the desired thickness is obtained. Is.

An object of the present invention is to provide an asphalt finisher capable of handling high temperature asphalt mixture such as goose asphalt mixture.

[0005]

An asphalt finisher according to a first aspect of the present invention comprises a movable main body 1 and an asphalt mixture supply means provided on the main body 1 for supplying an asphalt mixture onto an unpaved surface. And a spreading and leveling means which is provided on the main body 1 and spreads the asphalt supplied on the unpaved surface to a predetermined thickness, and the spreader so as to be substantially parallel to the moving direction of the main body 1. And an end plate provided on the leveling means, and asphalt heating means is provided on the end plate.

The asphalt finisher is characterized in that the heating means comprises a heating chamber provided inside the end plate and having a hollow interior, and heat supply means for supplying heat to the heating chamber. There is.

An asphalt finisher according to a second aspect is the asphalt finisher according to the first aspect, characterized in that the heat supply means is a gas burner.

The asphalt finisher according to a third aspect is the asphalt finisher according to the first aspect, characterized in that the heat supply means is a hot air guide path for guiding the hot air obtained from the spreading and leveling means. .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A first example of an embodiment of the present invention will be described with reference to FIGS. 1 and 2 for parts common to those of the prior art, and FIGS. 3 to 5 for characteristic parts. Explain. It should be noted that detailed description of portions having substantially the same configuration as the conventional asphalt finisher described with reference to FIGS. 1 and 2 will be omitted except for the portions necessary for the description of the characteristic portions. For example, a main body 1 that moves on an unpaved surface, a conveying device 3 provided on the main body 1 as an asphalt mixture supplying means for supplying an asphalt mixture to the unpaved surface, and an asphalt supplied on the unpaved surface are predetermined. Screed 5 provided as a spreading and leveling means on the main body 1, and a pair of end plates 7 provided at both ends of the screed 5 so as to be substantially parallel to the moving direction of the main body 1. Etc., the conventional general asphalt finisher and the asphalt finisher of this example have the same structure.

The screed 5 has a side plate 8 that is substantially parallel to the traveling direction of the apparatus, and a screed plate 9 that is substantially parallel to the unpaved surface and connects the bottom of the side plate 8 and the main body 1 side. The upper portion of the side plate 8 is connected to the main body 1 side by a connecting rod 10 that is capable of expanding and contracting in a direction orthogonal to the side plate 8. By extending and contracting the connecting rod 10 and moving the side plate 8 along the width direction of the unpaved surface, the width of the spread by the screed plate 9 can be arbitrarily set. The screed 5 having the above-mentioned mechanism has the arm 6 as a whole.
The pavement thickness can be adjusted by swinging the arm 6 to arbitrarily set the interval between the screed 5 and the unpaved surface.

The rear end of the end plate 7 is fixed to the outer surface of the lower portion of the side plate 8 of the screed 5. The end plate 7 has a horizontally long rectangular shape in a side view, and the front end upper side in the traveling direction is chamfered. A reinforcing square member 11 is fixed to the lower edge of the outer surface of the end plate 7. The lower edge of the end plate 7 is substantially parallel to the lower surface of the screed plate 9, and is held substantially parallel to the unpaved surface during work.

A heating means 12 for heating the asphalt mixture is provided in the lower half of the inner surface of the end plate 7 excluding the side plate mounting portion of the screed 5. The heating means 12 has a heating chamber 13 provided inside the end plate 7 and having a hollow interior. The heating chamber 13 is a rectangular parallelepiped box provided along the longitudinal direction of the end plate 7. The lower surface of the heating chamber 13 is located above the lower edge of the end plate 7, and when the lower edge of the end plate 7 is in contact with the unpaved surface, the lower surface of the heating chamber 13 and the unpaved surface are There is a slight gap between them.

A gas burner 14 as a heat supply means for supplying heat into the heating chamber 13 is detachably attached to a position on the upper surface of the heating chamber 13 in the rear direction with respect to the traveling direction of the apparatus, with the ignition port facing downward. It is provided. Gas burner 14
A gas supply pipe 15 is connected to the. Gas burner 1
A round hole 1 for ignition is provided on the end plate 7 near the ignition port of No. 4
6 is open.

A rectangular tube-shaped chimney portion 17 communicating with the heating chamber 13 is connected to a position on the upper surface of the heating chamber 13 in the forward direction of the apparatus. At the upper end of the chimney portion 17, the first rectangular shape along the diagonal outer edge of the end plate 7 is provided.
The smoke exhaust port 18 is open. The first smoke exhaust port 18 is a second parallelogram formed on a part of the inner surface of the chimney part 17.
It is integrated with the smoke exhaust port 19 of.

The heating means 12 is provided with a lid 20 for closing a part of the smoke exhaust ports 18 and 19. Lid 20
Is a support plate fixed to both ends of the lid plate.
Small cylinders 21 penetrating to hold 0 are fixed respectively. If you insert the rod of the lid 20 into the small cylinder 21,
The first smoke exhaust port 18 is closed by the cover plate of the lid body 20, and the second smoke exhaust port 19 remains open.

The operation of the asphalt finisher of this example will be described. The asphalt mixture having a predetermined temperature supplied from the hopper 2 of the main body 1 is conveyed to the rear of the main body 1 and then spread on the unpaved surface by the spreader 4 and supplied onto the unpaved surface. The screed 5 is set at a position in the same direction according to the width of the unpaved surface, and the asphalt mixture is spread by the screed 5 to a predetermined thickness.

At this time, an end plate 7 projecting forward of the front end edge of the screed plate 9 is provided outside the screed 5, and the asphalt mixture supplied on the unpaved surface in front of the screed 5 is paved with a pave width. It prevents it from flowing outwards. Further, a heating means 12 is provided on the inner surface of the end plate 7 to keep the temperature of the asphalt mixture supplied onto the unpaved surface and spread by the screed 5 thereafter, so that the asphalt mixture is predetermined by the screed 5. It is kept at an appropriate temperature until it is evenly spread. The conventionally found inconvenience that the temperature of the asphalt mixture is lowered by coming into contact with the end plate 7 and spread on the screed 5 and before the predetermined thickness is obtained is avoided. Therefore, in order to avoid such an inconvenience, it is not necessary for a worker to take a complicated and expensive method of heating the end plate 7 with a burner or the like.

The exhaust air from the heating chamber 13 is exhausted from the smoke exhaust port 18 or 19 of the chimney portion 17. When there is a possibility that the asphalt mixture supplied onto the unpaved surface may enter the heating chamber 13 through the smoke exhaust port, the lid body 20 is attached to the chimney portion 17.
The first smoke exhaust port 18 on at least the upper surface of the chimney portion 17 may be closed. The exhaust gas is exhausted from the second smoke exhaust port 19 on the side surface.

In the example described above, the heating means 1
Gas burner 1 as heat supply means provided in second heating chamber 13
However, other heat supply means may be used. For example, in the screed 5, the screed plate 9
When there is a means for heating the hot air, the hot air obtained therefrom may be guided to the heating chamber 13 via the hot air guide supply path. In that case, the hot air guide supply path functions as a heat supply means.

[0020]

According to the asphalt finisher of the present invention, the screed end plate is provided with the heating means for keeping the asphalt mixture warm, so that the asphalt mixture is kept warm, for example, the goose asphalt mixture There is an effect that a material handled at such a high temperature can be used for construction under appropriate construction conditions.

[Brief description of drawings]

FIG. 1 is a plan view of a general asphalt finisher.

FIG. 2 is a front view of a general asphalt finisher.

FIG. 3 is an enlarged front view of the vicinity of an end plate according to the embodiment of the present invention.

FIG. 4 is an enlarged plan view of the vicinity of an end plate according to the embodiment of the present invention.

FIG. 5 is an enlarged side view of the vicinity of the end plate according to the embodiment of the present invention.

[Explanation of symbols]

1 body 3 Asphalt mixture material feeding device 5 Screed as a leveling means 7 End plate 12 Heating means 13 heating chamber 14 Gas burner as heat supply means

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Matsubashi 27-2 Nihonbashi Hakozakicho, Chuo-ku, Tokyo Inside the Nagura Manufacturing Co., Ltd. (72) Inventor Hirokazu Watanabe 1-9-3 Kamatahonmachi, Ota-ku, Tokyo Niigata Construction Machinery Co., Ltd. (72) Inventor Isahiro Sasa, Gunma-gun Gunma-cho Gunma Town, 730 Midaka, Niigata Construction Machinery Co., Ltd. (56) References Japanese Patent Publication No. 63-52168 (JP, B2) (58) Int.Cl. ⁷ , DB name) E01C 19/48

Claims (3)

(57) [Claims] 1. A movable main body, asphalt mixture supply means provided on the main body for supplying an asphalt mixture onto an unpaved surface, and asphalt provided on the main body and supplied onto an unpaved surface. and laying leveling flooring smoothing means to a predetermined thickness, wherein substantially an end plate <br/> Bei example provided in the spread smoothing means so as to be parallel to the moving direction of the body, the Asphalt heating means on the end plate
In the provided asphalt finisher, the heating means is provided on the inner surface side of the end plate.
The interior of the heating chamber is hollow and the heat is supplied to the heating chamber.
An asphalt finisher comprising a heat supply means for Wherein said heat supply means, the asphalt finisher of claim 1 wherein the gas burner. 3. The hot air guide supply path for guiding the hot air obtained from the spreading and leveling means, according to claim 1.
Asphalt finisher shown.