JP3459996B2 - Screed device for road paving vehicles such as asphalt finishers - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road paving vehicle such as an asphalt finisher, a repaver or a remixer for laying and mixing a composite material. Especially for road paving vehicles such as asphalt finishers equipped with a tamper edge located at the front end of the screed plate to compact the mix by moving up and down, and a pressure bar located at the rear end of the screed plate to compact the mix by moving up and down. The present invention relates to a screed device.

[0002]

2. Description of the Related Art As shown in FIG. 3, in an asphalt finisher screed device, a screed plate 2 for laying a mixed material on a screed frame 1 is attached by bolts 3 or the like, and at a front end position of the screed plate 2. A tamper edge 4 that moves up and down to compact the mixture is provided.

Further, as shown in FIG. 4, there is also a screed device having a pressure bar 5 which moves up and down at the rear end position of the screed plate 2 to compact the composite material.

Further, as shown in FIGS. 5 and 6, the tamper edge 4 is provided with a box-shaped strike-off 6 at the front end position of the tamper edge 4 in order to make it easier for the mixture to flow into the lower surface of the screed device. There is also a screed device having only the strike-off 6 at the front end of the screed plate 2.

These screed devices are equipped with burners and the like that use LPG, light oil, or the like as fuel, so that at the start of construction, problems such as dragging of the pavement surface caused by the mixed material that cools and adheres to the screed plate 2 do not occur. The screed plate 2 is heated to almost the same temperature as the mixture. However, when a burner is used, a problem occurs due to a temperature difference in the width direction such that the plate temperature rises too much directly below the burner and the mixture burns, and conversely, the plate temperature does not sufficiently warm away from the burner. In order to solve the above problem, there is a screed device in which a heating wire is laid on the screed plate 2, but there are drawbacks that there is a risk of disconnection due to vibration and that a generator must be prepared separately.

Therefore, as shown in FIG. 7, the burner 8 uses the air blown by the blower 7 as a fuel such as LPG or light oil.
There is also a screed device in which the heating temperature is passed through the duct 9 and is sprayed to the screed plate 2 through a small hole provided on the lower surface of the duct 9 so as to make the heating temperature in the width direction of the screed plate 2 uniform. . Furthermore, in this case, the hot air that has heated the screed plate 2 is passed through the pipe 1
At 0 etc., lead into strike off 6 and strike off 6
It is also possible to heat the.

However, even in this case, only the screed plate 2 and the strike-off 6 are heated, and the tamper edge 4 and the pressure bar 5 are not heated. For this reason, a problem such as dragging of the pavement surface caused by the mixture material that has come into contact with them during construction and that has cooled and adhered occurs.

Further, the asphalt component of the composite material that has entered the sliding surfaces of the tamper edge 4, the pressure bar 5 and the screed plate 2 may be cooled and fixed after the completion of the construction, and they may not be able to move up and down at the start of the next construction.

In order to solve the above problem, there is a method of passing a heating wire through the tamper edge 4 or the pressure bar 5 or blowing hot air that has heated the screed plate 2. However, when passing through the heating wire, there are problems that the wire may be broken and a generator must be provided as described above. In addition, when hot air is blown, there is a problem that the hot air affects the surroundings. Further, it is only the inside of the mounting portion of the screed frame 1 and the screed plate 2 with the bolts 3 (the portion A in FIG. 7) that is heated by the hot air,
The front end side (dimension B in FIG. 7) and the rear end side (C in FIG. 7)
Dimensions) are not heated. Therefore, the temperature difference in the front-back direction still remains.

[0010]

In a screed device for a road paving vehicle such as an asphalt finisher, it is possible to heat a tamper edge and a pressure bar with a simple structure, and to touch them at the time of construction. Prevent the occurrence of defects such as surface dragging, or the asphalt component of the mixture that has entered the sliding surface with the screed plate and cools and sticks after the completion of construction, and prevents them from moving up and down at the start of the next construction. An object of the present invention is to provide a screed device capable of performing the above.

[0011]

Therefore, in the screed device for a road paving vehicle such as an asphalt finisher according to the present invention, the air blown by the blower (7) is heated by a burner using LPG or light oil as a fuel. In the screed device of the type that heats the screed plate (2) with hot air, the screed plate (2) is attached to the front end.
A tamper edge (4) is provided, and the mixture is flowed in front of it.
Equipped with a box-shaped strike-off (6) to make it easier
The front portion of the screed plate (2) and the front portion of the screed frame (1) are vertically separated from each other and connected by bolts (3), and a flat bar is provided between the end portions of the screed plate (2) and the screed frame (1). (12) Seal with
In addition, by providing a space for hot air to reach the front end of the screed plate (2) while making surface contact with the rear surface of the tamper edge (4), the front part of the screed plate can be uniformly heated to the front end. Further, the tamper edge (4) can be heated by heat conduction by the surface contact of the flat bar (12) for sealing. Further, in another screed device for a road paving vehicle such as an asphalt finisher of the present invention, the screed plate (2) is heated by hot air generated by heating the air blown by a blower with a burner using LPG or light oil as a fuel. Screed device (2)
The rear part and the rear part of the screed frame (1) are vertically separated from each other and connected by a bolt (3), and the screed plate (2) and the ends of the screed frame (1) are sealed with a flat bar (12) or the like. By providing a space for hot air to reach the rear end of the screed plate (2), the rear portion of the screed plate (2) can be uniformly heated to the rear end,
It is characterized in that the pressure bar (5) can also be heated by the heat conduction of the sealing flat bar (12).
Further, in a screed device for a road paving vehicle such as still another asphalt finisher of the present invention, a blower is used.
The air blown in (7) is burned with LPG or light oil as fuel.
Screed plate by hot air generated by heating
(2) In the screed apparatus of a system for heating, disk
Install the tamper edge (4) at the front end of the lead plate (2).
And a box type to facilitate the flow of the mixture in front of it.
Screed plate with strike-off (6)
Place the front of (2) and the front of the screed frame (1) up
Separate them downward and connect with bolts (3),
Rear of lead plate (2) and screed frame
(1) Separated from the rear part vertically and connected with bolts (3)
And screed plate (2) and screed frame
Seal between the ends of (1) with a flat bar (12)
And to make surface contact with the rear surface of the tamper edge (4).
Then, hot air passes to the front end of the screed plate (2).
Space is provided and the screed plate (2) and
Flat bar (1
2) etc., seal it to the rear end of the screed plate (2)
By providing a space for hot air to flow, screed play
Doo (2) the front end to allow uniform heating to the rear end of the further
For heat conduction by surface contact of the flat bar (12) for sealing
The tamper edge (4) can be heated more .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A tamper edge 4 will now be described with reference to FIG.
The configuration of the screed device capable of heating the will be described. The air blown by the blower 7 is heated by a burner 8 using LPG, light oil or the like as a fuel, the generated hot air is passed through a duct 9, and the hot air is blown to the screed plate 2 through a small hole provided on the lower surface of the duct 9, In a screed device that heats the screed plate 2, a cylindrical spacer 11 is interposed at an attachment portion of the screed frame 1 and the screed plate 2 with a bolt 3 so that hot air does not leak outside from this portion. A flat bar 12 or the like was provided at the front end of the plate 2 for sealing, and a space through which hot air passed was provided up to the front end of the screed plate 2. Thus, the front end of the screed plate 2 can be heated by hot air, and the screed plate 2 can be uniformly heated to the front end. Further, since the flat bar 12 is similarly heated, the tamper edge 4 provided in contact with the flat bar 12 is also heated by heat conduction.

By applying the above structure to the mounting portion of the screed frame 1 and the rear side of the screed plate 2 by the bolt 3 as shown in FIG. 2, it is possible to uniformly heat the rear end of the screed plate 2 with hot air. Becomes Thus, the temperature difference in the front-back direction of the screed plate 2 can be made uniform to the rear end. Therefore, the pressure bar 5 is also heated by heat conduction via the flat bar 12.

[0014]

1) Since the front end and the rear end of the screed plate 2 can be heated, the temperature difference can be made uniform in the front-back direction of the screed plate 2. 2) The portions where the screed plate 2 and the screed frame 1 are fixed are vertically separated from each other and connected by the bolts 3. Then, the flat bar 12 is attached to the end portion so as to be hermetically sealed. Although the structure is simple as described above, not only the front end or the rear end of the screed plate 2 but also the tamper edge 4 and the pressure bar 5 can be heated via the flat bar 12. As a result, it was possible to prevent the mixture from touching and sticking to it during construction, and to prevent problems such as dragging of the pavement surface. 3) Moreover, since the tamper edge 4 and the pressure bar 5 can be heated, the asphalt portion of the mixture material that has penetrated into the sliding surface between the tamper edge 4 and the pressure bar 5 and the screed plate 2 and has cooled and adhered is melted, and the next construction starts Occasionally, it is possible to prevent the occurrence of a problem in which these cannot move up and down.

[Brief description of drawings]

FIG. 1 is a screed device having the structure of the present invention at the front end of a screed plate.

FIG. 2 is a screed device having the structure of the present invention at the front and rear ends of a screed plate.

FIG. 3 Prior art with tamper edge 4.

FIG. 4 Prior art with pressure bar 5.

FIG. 5: Prior art with a box-shaped strike-off 6.

FIG. 6 Prior art with only strike-off 6;

FIG. 7 is a conventional technique in which the heating temperature in the width direction of the screed plate 2 is made uniform.

[Explanation of symbols]

1 screed frame 2 screed plate 3 bolt 4 tamper edge 5 pressure bar 6 strike off 7 blower 8 burner 9 duct 10 pipe 11 spacer 12 flat bar

Claims (3)

(57) [Claims] By 1. A hot air of LPG or gas oil such as a blown air was generated heated by a burner which is a fuel blower (7), the screed apparatus of a system for heating the screed plate (2), screed plate (2) Tamper edge (4) on the front edge of
A box to make it easier to flow the mixture in front of it
A die strike-off (6), and the front part of the screed plate (2) and the front part of the screed frame (1) are vertically separated from each other and connected by a bolt (3), and the screed plate (2) and the screed frame are connected. Seal the space between the ends of (1) with a flat bar (12), etc.
By providing a space for hot air to reach the front end of the screed plate (2) so that the front surface of the screed plate (4) is in surface contact with the screed plate (2), the front part of the screed plate can be uniformly heated to the front end, and a flat plate for sealing. A screed device for a road paving vehicle such as an asphalt finisher capable of heating the tamper edge (4) by heat conduction by surface contact of the bar (12). 2. A screed device for heating the screed plate (2) with hot air generated by heating air blown by a blower with a burner using LPG, light oil or the like as a fuel, and a screed plate (2) and a rear part thereof. The screed frame (1) and the rear part are vertically separated from each other and connected by bolts (3), and the screed plate (2) and the screed frame (1) are connected.
The ends of the screed plate (2) are sealed with a flat bar (12), etc., and a space for hot air to reach the rear end of the screed plate (2) is provided, so that the rear part of the screed plate (2) can be uniformly heated up to the rear end. A screed device for road paving vehicles, such as an asphalt finisher, characterized in that the pressure bar (5) can also be heated by the heat conduction of a flat bar (12) for a vehicle. 3. The air blown by the blower (7) is used as LPG or
The hot air generated by heating with a burner using light oil as fuel
Ri, subscription method to heat the screed plate (2)
Tamper edge (4) at the front end of the screed plate (2)
A box to make it easier to flow the mixture in front of it
Screed plate with die strike-off (6)
Place the front of (2) and the front of the screed frame (1) up
Separate them downward and connect with bolts (3),
Rear of lead plate (2) and screed frame
(1) Separated from the rear part vertically and connected with bolts (3)
The screed plate (2) and screed frame (1)
It is common to use a flat bar (12) to seal between the ends of the
So that it makes surface contact with the rear surface of the tamper edge (4),
A space where hot air passes to the front end of the screed plate (2)
Provided and screed plate (2) and scree
Use a flat bar (12) between the ends of the frame (1)
Seal and let hot air flow to the rear end of the screed plate (2).
A screed plate (2)
The uniform heating from the front end to the rear end is possible, and the heat generated by the surface contact of the flat bar (12) for sealing.
A screed device for road paving vehicles such as asphalt finishers, which is also capable of heating the tamper edge (4) by conduction .