JP2009138469A - Tamper washing apparatus for asphalt finisher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate removal of asphalt entering a screed body from a clearance between a tamper and a screed plate of an asphalt finisher. <P>SOLUTION: A nozzle 14 for sprinkling wash liquid is arranged above the tamper 11 arranged between a strike off plate 9 at the front part of a screed apparatus 6 and the screed plate 10 at the rear part. The nozzle is connected to a pump, and when a cock or a valve is opened, the wash liquid is sprinkled to the tamper and its periphery from the nozzle. Asphalt which entered the screed apparatus from the clearance between the tamper and the screed plate and was deposited is dissolved and washed by the wash liquid and discharged to the outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a tamper cleaning apparatus for an asphalt finisher, and more particularly to a tamper cleaning apparatus for an asphalt finisher capable of cleaning and preventing asphalt adhered to the tamper by a simple operation.

  The asphalt finisher used for asphalt paving work is a bar conveyor that drops asphalt from the hopper at the front of the vehicle body to the rear of the vehicle, a screw spreader that spreads the dropped asphalt in the width direction of the road, and pushes the spread asphalt A screed device is provided.

Some screed devices include a striker plate disposed between a front strike-off plate or a mold board and a rear screed plate (see, for example, Patent Document 1). Along with this, a tamper that moves up and down roughly compacts the asphalt, and the screed plate flattens and finishes.
Japanese Patent No. 379431

  In the screed device in which the tamper is disposed between the strike-off plate or the mold board and the rear screed plate, a part of the asphalt attached to the tamper reciprocating up and down during the paving work is separated from the tamper and the screed plate. Since it penetrates into the screed body through the gap and accumulates, periodic cleaning is required. The asphalt deposited in the screed body solidifies at room temperature, so when cleaning it is heated with a burner etc. to soften and remove the asphalt, but the mechanism where the asphalt is deposited is complicated. Difficult, time consuming and time consuming.

  Further, there is a method of removing the strike-off plate and removing asphalt accumulated between the tamper and the screed plate. However, it takes time and effort to attach and detach the strike-off plate, and further labor is required.

  Therefore, the strike off plate or mold board located before and after the tamper or the asphalt that has entered the screed body from the gap between the screed plate and the tamper can be easily removed to solve the problem of reducing the labor of cleaning. A technical problem arises, and the present invention aims to solve this problem.

  The present invention is proposed to achieve the above object, and the invention according to claim 1 is a tamper that moves up and down between the strike-off plate or mold board at the front of the screed device and the screed plate at the rear. In an asphalt finisher that tamps the asphalt mixture with a tamper and then presses and flattens it with a subsequent screed plate, a nozzle disposed above the tamper, a pump for supplying a cleaning liquid to the nozzle, a cleaning liquid tank, and the nozzle and the pump A tamper cleaning device for an asphalt finisher is provided, which includes a cock or a valve provided between the two and opens the cock or valve so that the cleaning liquid can be sprayed on the tamper to clean the tamper and the asphalt adhering to the periphery. Is.

  In the above configuration, when the cock or valve is opened, the cleaning liquid is sprayed from the nozzle disposed above the tamper, and the asphalt adhering to the tamper and its periphery is dissolved by the cleaning liquid and discharged to the ground together with the cleaning liquid. .

  The invention described in claim 2 provides a tamper cleaning device for an asphalt finisher in which a plurality of the nozzles are arranged at regular intervals above the tamper and along the longitudinal direction of the tamper.

  In said structure, a washing | cleaning liquid can be sprayed uniformly throughout the tamper.

  According to a third aspect of the present invention, there is provided a tamper cleaning apparatus for an asphalt finisher in which a plurality of the nozzles are arranged at regular intervals in the longitudinal direction of the tamper and above or at the top of the tamper.

  With the above-described configuration, the cleaning agent can be intensively sprayed on both the front and rear surfaces of the tamper and the surrounding asphalt deposits.

  Since the cleaning liquid is sprayed from the cleaning liquid tank to the tamper by opening the cock and the valve and the asphalt adhering to the tamper and its periphery is dissolved and cleaned, the removal work of these adhering asphalt Is greatly reduced.

  According to the second aspect of the present invention, by arranging a plurality of nozzles at regular intervals along the tamper and in the longitudinal direction of the tamper, the cleaning liquid is evenly distributed over the entire tamper, and the entire tamper can be effectively cleaned.

  In the invention according to claim 3, by arranging a plurality of nozzles at a predetermined interval above one or both of the front surface and the back surface of the tamper, the cleaning liquid can be effectively sprayed on the asphalt-adhering surface of the tamper. Further improvement can be expected.

  The present invention includes a tamper that moves up and down between a strike-off plate or a mold board at the front of the screed device and a screed plate at the rear. The asphalt mixture is tamped by the tamper and pressed flat by the subsequent screed plate. The asphalt finisher includes a nozzle disposed above the tamper, a pump and a cleaning liquid tank for supplying cleaning liquid to the nozzle, and a cock or valve provided between the nozzle and the pump, and by opening the cock or valve, It is possible to clean the asphalt adhering to the tamper and its surroundings by spraying the cleaning liquid on the tamper, and to facilitate the removal of the asphalt entering the screed body from the gap between the tamper and the strike-off plate or mold board and the screed plate. To achieve the target.

  FIG. 1 shows an asphalt finisher 1, a vehicle body 2 having a small-diameter front wheel 3 and a large-diameter rear wheel 4, a hopper 5 for containing asphalt mixed material is arranged at the front, and a screed device at the rear of the vehicle body 2. 6 are connected. A bar conveyor (not shown) that extends from the inner bottom surface of the hopper 5 to the rear end of the vehicle body 2 is disposed at the lower part of the vehicle body 2, and the asphalt mixture that is thrown into the hopper 5 from a dump truck or the like is a bar conveyor. It is conveyed to the rear of the vehicle body 2 by a conveyor, dropped onto the road surface, and is developed in the direction of the outer edge of the pavement width by a screw spreader (not shown) disposed between the vehicle body 2 and the screed device 6. Flattened and leveled.

  FIG. 2 is a partial cross-sectional view of the screed device 6. A strike-off plate 9 is disposed at the lower part of the back surface of the mold board 8 disposed on the front surface (left side in FIG. 2) of the screed frame 7. A vertically movable tamper 11 is disposed between the screed plate 10 and the other screed plate 10.

  The strike-off plate 9, the tamper 11 and the screed plate 10 are members each having a width substantially equal to the entire width of the screed device 6 (the front and back direction in the drawing), and the tamper 11 is connected to the drive shaft 13 via the connecting bar 12. Due to the action of an eccentric cam portion (not shown) formed on the drive shaft 13, the connecting bar 12 and the tamper 11 move up and down in conjunction with the rotation of the drive shaft 13 and push the asphalt mixture on the road surface. Solidify.

  Above the tamper 11, a nozzle 14 for cleaning the asphalt adhering to the tamper 11 and the asphalt entering from the gap between the tamper 11 and the strike-off plate 9 or the screed plate 10 with a cleaning liquid is disposed.

  FIG. 3 is a plan view showing the arrangement of the nozzles 14, and a plurality of nozzles 14 are arranged on the spray bar 15 arranged in parallel with the tamper 11 toward the upper surface of the tamper 11 at regular intervals. The spray bar 15 is a hollow pipe member and is connected to a pump (not shown) via a flexible hose 16.

  FIG. 4 is a circuit diagram of the cleaning liquid spraying mechanism. The pump 19 driven by the cleaning liquid tank 17 and the motor 18 is mounted on the vehicle body 2 of the asphalt finisher 1 and connects the pump 19 and the spray bar 15 described above. A solenoid valve 20 is provided on the road.

  When the switch 21 that controls the electromagnetic valve 20 and the motor 18 is turned on, the pump 19 is activated to suck up the cleaning liquid in the cleaning liquid tank 17, and the electromagnetic valve 20 is opened to spray the cleaning liquid from the nozzle 14 of the spray bar 15. . As shown in FIG. 3, since the nozzles 14 are arranged at regular intervals along the longitudinal direction of the tamper 11, the cleaning liquid is sprayed over the entire tamper 11, and the asphalt adhering to the tamper 11 is dissolved by the cleaning liquid. Then, it flows down to the surface through the gap before and after Tampa 11. When the electromagnetic valve 20 is closed, or when the pressure of the pipe line to the spray bar 15 exceeds a predetermined value, the cleaning liquid returns from the pump 19 to the cleaning liquid tank 17 through the return circuit.

  FIG. 5 shows an example in which a cock 22 is provided in place of the electromagnetic valve 20 and the switch 21, and the spraying of the cleaning liquid is turned on and off by manual operation of the cock 22.

  The switch 21 and the cock 22 may be arranged at the driver's seat of the vehicle body 2 or at the rear of the screed device 6. In any case, after the paving work is completed or during the paving work, the tamper 11 is cleaned by operating the switch 21 and the cock 22 as necessary, thereby entering the inside of the asphalt or screed device 6 adhered to the tamper 11. Asphalt can be easily removed, and asphalt adhesion prevention effect by the cleaning liquid can be expected.

  2 shows an example in which the nozzles 14 are arranged directly above the tamper 11, but as shown in FIG. 6, a plurality of nozzles 14 are arranged at regular intervals both above the front surface of the tamper 11 and above the back surface. Thus, the cleaning liquid may be sprayed on the front surface and the back surface of the tamper 11.

  Further, the screed device 6 is not limited to the one in which the strike-off plate 9 is disposed in front of the tamper 11, but the strike-off plate is not used as shown in FIG. 7, and the tamper 11 is disposed between the mold board 8 and the screed plate 10. Needless to say, the tamper cleaning apparatus of the present invention can be applied to the arrangement.

  The configuration of the tamper cleaning apparatus of the present invention has been described above. Examples of cleaning liquids suitable for removing asphalt by the tamper cleaning apparatus include a strong citrus oil system that has a strong affinity for mineral oil, grease, and asphalt, and has a strong cleaning power. Industrial liquid detergents, vegetable oil-based adhesion inhibitors containing nonionic active agents, silicone-based asphalt adhesion inhibitors, and the like are known to have good cleaning performance and low environmental impact.

  The present invention is not limited to the above embodiment. For example, the spray bar 15 is not used, a branch plug is provided in the pipe line from the pump 19, and each of the plurality of nozzles 14 is connected to the branch plug with a flexible hose. Various modifications are possible within the technical scope of the present invention, such as individual connection, and it is natural that the present invention covers these modifications.

Side view of asphalt finisher. 1 is a partial cross-sectional view of a screed device according to an embodiment of the present invention. The top view which shows arrangement | positioning of the nozzle of a screed apparatus. The circuit diagram of a tamper cleaning apparatus. The circuit diagram of other embodiments of a tamper cleaning device. The other embodiment of this invention is shown, and the fragmentary sectional view of the screed apparatus. The other embodiment of this invention is shown, and the fragmentary sectional view of the screed apparatus.

Explanation of symbols

1 Asphalt finisher
2 Body
5 Hopper
6 Screed device
7 Screed frame
8 Mold board
9 Strike-off plate
10 Screed plate
11 Tampa
12 Connecting bar
13 Drive shaft
14 nozzles
15 Spray bar
16 Flexible hose
17 Cleaning liquid tank
18 Motor
19 Pump
20 Solenoid valve
21 switch
22 cock

Claims (3)

In an asphalt finisher having a striker plate that moves up and down between a strike-off plate at the front of the screed device or a mold board and a screed plate at the rear, tamping the asphalt mixture with the tamper, and pressing it flat with the subsequent screed plate,
A nozzle disposed above the tamper, a pump and a cleaning liquid tank for supplying cleaning liquid to the nozzle, and a cock or valve provided between the nozzle and the pump, and the cleaning liquid is supplied to the tamper by opening the cock or valve. An asphalt finisher tamper cleaning device that can spray and remove the tamper and asphalt adhering to the periphery.   The tamper cleaning apparatus for an asphalt finisher according to claim 1, wherein the plurality of nozzles are arranged at regular intervals above the tamper and along the longitudinal direction of the tamper.   The asphalt finisher tamper cleaning apparatus according to claim 1, wherein the plurality of nozzles are arranged at regular intervals in the longitudinal direction of the tamper and above or both of the front surface and the back surface of the tamper.

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