JP6134686B2 - Watering equipment for compaction machine - Google Patents

Description

  The present invention relates to a watering device for a compacting machine, and more particularly to a watering device for spraying water on the front and rear wheels for the purpose of preventing the pavement material from adhering to the front and rear wheels of the compacting machine.

This type of compacting machine is used to compact paving materials in road surface paving work or the like. The front and rear parts of the car body are equipped with rolling wheels that also serve as wheels (for example, rolling tires and iron wheels), and the pavement material is tightened by the rolling wheels while running on the road surface covered with paving material such as asphalt mixture. It is solidified. Since the rolling wheel comes into contact with the pavement material with a strong pressure, a piece peeled off from the pavement material adheres to the surface of the rolling wheel, thereby preventing a smooth road surface from being formed. Therefore, a watering nozzle is disposed in the vicinity of the rolling wheel, and water is sprayed from the watering nozzle to the outer peripheral surface of the rolling wheel during pavement work to prevent the pavement material from adhering.
For such sprinkling, the water stored in the water storage tank of the compaction machine is used, but the water storage capacity of the water storage tank is limited and the water supply to the water storage tank is limited. If this is done frequently, it will hinder the important paving work. For this reason, water spraying to the rolling wheel needs to save water as much as possible after preventing the pavement material from adhering.

For example, Patent Document 1 discloses a watering device that can arbitrarily switch between a continuous watering mode in which water is continuously sprinkled and an intermittent watering mode in which water is intermittently sprinkled according to the adhesion state of the pavement material to the rolling wheel. ing. In this watering device, since an ON / OFF type electromagnetic valve is provided in the watering nozzle, water is sprayed at a constant flow rate when the electromagnetic valve is opened.
For example, if the pavement material is heavily attached to the rolling wheel during work in a cold region, etc., select the continuous watering mode with an emphasis on prevention of adhesion and continue to open the solenoid valve for a certain amount of watering. Done continuously. On the other hand, when the pavement material does not adhere so much to the rolling wheel due to work under hot weather, the intermittent watering mode is selected with emphasis on water saving, and the ON period and OFF arbitrarily set by the driver by the timer Water is intermittently sprayed based on the period (hereinafter referred to as intermittent period).

As described above, in the technique of Patent Document 1, the watering amount is limited by the intermittent watering mode based on the setting of the timer, but there is another method. For example, in the antifreezing agent spraying device disclosed in Patent Document 2, the amount of antifreezing agent spraying can be limited by providing a variable flow rate solenoid valve in the antifreezing agent spraying nozzle. In this type of spraying device, it is necessary to spray the antifreeze agent evenly on the road surface regardless of the traveling speed of the work vehicle. The spraying amount of the inhibitor is reduced.
Therefore, it is conceivable to apply the technique of Patent Document 2 to a watering device of a compacting machine, and to provide a variable flow rate electromagnetic valve in the watering nozzle to limit the watering amount. That is, in this case, the continuous watering mode is executed instead of the intermittent watering mode, and the electromagnetic valve is controlled to the closed side to limit the amount of watering to meet the demand for water saving.

No. 7-32567 JP-A-8-218339

By the way, the rolling wheel during the paving work compacts the paving material while rolling on the road surface, so that the adhering state of the paving material on the entire circumference becomes substantially uniform. Inevitably, the minimum required amount of water spray required to prevent pavement material adhesion is almost equal over the entire circumference of the rolling wheel. This is an indispensable requirement to achieve both water saving and high level.
In the technique of Patent Document 2, since the water spray is continuously performed in the continuous water spray mode without performing the intermittent water spray mode, the water spray is uniformly and optimally distributed over the entire circumference of the rolling wheel regardless of the amount of water spray. The amount of water can be realized. However, the technique of Patent Document 2 requires a variable flow rate solenoid valve to limit the amount of water spray. As is well known, the variable flow rate solenoid valve is considerably more expensive than the ON / OFF solenoid valve, which raises the problem of increasing the manufacturing cost of the watering device itself. In addition, when the flow rate is reduced in the variable flow type solenoid valve, the water spray does not spread and the entire tire width is not covered.

Although the technique of Patent Document 1 can be implemented with an inexpensive ON / OFF type solenoid valve, in the intermittent watering mode that limits the amount of watering, the intermittent period of watering is controlled based on the timer setting. There is a bias in the area sprayed around the entire circumference of the pressure wheel. That is, since the intermittent watering period is controlled based only on the setting of the timer regardless of the rotation of the rolling wheel, the timing of the watering start and the timing of the watering stop randomly occur on the entire circumference of the rolling wheel.
As a result, a region with a large amount of sprinkling and a region with a small amount of sprinkling are formed on the entire circumference of the rolling wheel, and the pavement adhesion state is substantially uniform over the entire circumference of the rolling wheel. There will be excess and deficiency of watering in the area. In areas where watering is insufficient, pavement material adhesion cannot be sufficiently prevented, and in areas where watering is excessive, excess water is consumed, so pavement material adhesion prevention and water saving can be achieved at a high level. Disappear.

  The present invention has been made to solve such problems, and the object of the present invention is to realize a uniform and optimum water spray amount over the entire circumference of the rolling wheel, thereby preventing pavement material adhesion. Another object of the present invention is to provide a watering device for a compacting machine that can achieve both high-efficiency and water-saving.

  According to a first aspect of the present invention, there is provided a watering means that is disposed at a position close to a rolling wheel of a vehicle and that sprays an appropriate amount of water preset per unit time on the outer peripheral surface of the rolling wheel, A rotation angle detection means for detecting the rotation angle of the wheel, a rotation angle of the rolling wheel based on detection information from the rotation angle detection means, and a period of one rotation of the compression wheel based on the determination result, Water spray control means set to operate the water spray means and execute water spray over a period in which the rolling wheel rotates by a multiple based on one rotation based on the determined cycle of one rotation. It is characterized by.

  During the period in which the rolling wheel rotates by a multiple based on one rotation, watering is performed by the watering means. And since the watering amount per unit time from the watering means is an appropriate amount set in advance, watering is performed over a period in which the rolling wheel rotates by a multiple of one rotation. The amount of water sprayed on the outer circumferential surface is substantially uniform in any region of the entire circumference, and this point does not change even if the traveling speed of the vehicle changes.

  On the other hand, the rolling wheel compacts the pavement material while rolling on the road surface, so the adhesion state of the pavement material on the entire circumference becomes substantially uniform, and the amount of water spray required to prevent the adhesion is also It becomes substantially uniform over the entire circumference of the rolling wheel. Therefore, according to the present invention, the water spray can be uniformly and optimally distributed over the entire circumference of the rolling wheel, that is, the pavement agent can be prevented from adhering to the outer circumferential surface of the rolling wheel, and the consumption of excess water can be suppressed. Watering amount can be realized.

The second aspect of the present invention is characterized by comprising intermittent setting means for setting a multiple, and the watering control means performs watering based on the multiple set by the intermittent setting means.
By setting the multiple, the average watering amount per unit time as a whole can be arbitrarily changed.

The third aspect of the present invention includes vehicle speed detecting means for detecting the traveling speed of the vehicle, and when the watering control means is less than a preset lower limit speed when the traveling speed detected by the vehicle speed detecting means is less than Sprinkling is stopped even during a period based on multiples.
For some reason, the running speed may drop extremely beyond the speed range suitable for compaction work, but at this time, since substantial water spraying is stopped, water drift due to inappropriate running speed may occur. A state can be avoided in advance.

  ADVANTAGE OF THE INVENTION According to this invention, the uniform and optimal water spraying quantity can be implement | achieved with respect to the perimeter of a rolling wheel, Therefore, the adhesion prevention of pavement material and water saving can be made compatible in a high dimension.

It is a side view showing a tire roller provided with a watering device of an embodiment. It is a block diagram which shows the structure of a watering apparatus. It is a flowchart which shows the intermittent watering control routine which ECU performs. It is a time chart which shows the watering condition by the process of ECU.

Hereinafter, an embodiment in which the present invention is embodied in a water spray device for a tire roller will be described.
FIG. 1 is a side view showing a tire roller provided with a watering device of the present embodiment. In the following description, the vehicle is mainly used to define the front-rear direction and the left-right vehicle width direction.
The front part of the vehicle body 2 of the tire roller 1 is provided with three rubber front rolling tires 3f (rolling wheels) that also serve as wheels, and these front rolling tires 3f are arranged in parallel in the left-right direction. Has been. Further, four rubber rear rolling tires 3r (rolling wheels) also serving as wheels are provided at the rear of the vehicle body 2, and these rear rolling tires 3r are arranged in parallel in the left-right direction.

Although not shown, a hydraulic motor is connected to the rear rolling tire 3r as a driving power source. The hydraulic motor is operated by being supplied with pressure oil from an engine-driven hydraulic pump mounted in the vehicle body 2, and drives the tire roller 1 by rotationally driving the respective rolling tires 3 f and 3 r. .
In the present embodiment, since the front roller tire 3f and the rear roller tire 3r are set to have the same diameter, when the tire roller 1 travels, the roller tires 3f and 3r rotate in synchronization. It has become.

An operation console 5 having a steering 4 is installed on the vehicle body 2, a seat 6 is installed on the rear side of the operation console 5, and a roof 7 is provided so as to cover the operation console 5 and the seat 6 from above. ing. An operator seated on the seat 6 runs the tire roller 1 by operating the steering pedal 4 and an accelerator pedal and a brake pedal (not shown) under the foot, and laid on the road surface by the front and rear compaction tires 3f and 3r during the paving work. Compact paving material.
A front watering nozzle 9f (watering means) is disposed on the upper front side of the front rolling tire 3f, and the front watering nozzle 9f extends in the vehicle width direction and is an outer peripheral surface of each front rolling tire 3f. Is opposite. A rear watering nozzle 9r (watering means) is disposed on the upper rear side of the rear rolling tire 3r, and the rear watering nozzle 9r extends in the vehicle width direction so as to face the outer peripheral surface of each rear rolling tire 3r. doing.

FIG. 2 is a block diagram showing the configuration of the watering device.
The front watering nozzle 9f and the rear watering nozzle 9r are connected to an ON / OFF type electromagnetic valve 11 (watering means) via a pipe 10, and the electromagnetic valve 11 is connected to a watering pump 13 (watering means) via a pipe 12. Has been. A water storage tank 14 is installed in the vehicle body 2 of the tire roller 1, and water in the water storage tank 14 is pumped up when the watering pump 13 is activated when the electromagnetic valve 11 is opened. The pumped water is supplied to the front and rear sprinkling nozzles 9f and 9r from the sprinkling pump 13 via the pipes 10 and 12 and the electromagnetic valve 11, respectively, and the front and rear rolling tires 3f and 9r are supplied from these sprinkling nozzles 9f and 9r, respectively. Water is sprayed on the outer peripheral surface of 3r. Since the ON / OFF type solenoid valve 11 does not have a function of adjusting the flow rate, watering at this time is performed in a constant amount per unit time.

  The ECU 21 that controls the watering device includes an input / output device (not shown), a storage device (ROM, RAM, etc.) used for storing control programs and control maps, a central processing unit (CPU), a timer counter, and the like. . On the input side of the ECU 21, a wheel speed sensor 22 (rotation angle detection means, vehicle speed detection means) for detecting the wheel speed of the rear rolling tire 3r, a mode selection switch 23 for selecting the watering mode, and one of the watering modes In the intermittent watering mode, an intermittent setting switch 24 (intermittent setting means) for setting the intermittent period is connected. The detection target of the wheel speed sensor 22 may be the front rolling tire 3r instead of the rear rolling tire 3r.

  The mode selection switch 23 can be switched between three positions of a watering stop mode, a continuous watering mode, and an intermittent watering mode. The watering stop mode is a mode in which watering is stopped, and is selected when the tire roller 1 is being transported, for example, when watering to the compaction tires 3f and 3r is unnecessary except during paving. Both the continuous watering mode and the intermittent watering mode are modes for watering the rolling tires 3f and 3r. The continuous watering mode is a mode for watering continuously, and the intermittent watering mode is a mode for watering intermittently.

The intermittent period set by the intermittent setting switch 24 includes an ON period in which watering is performed and an OFF period in which watering is stopped. As described below, in the intermittent watering mode of the present embodiment, since the watering is repeatedly executed and stopped based on a predetermined multiple of one rotation of the rolling tires 3f and 3r, the ON period and the OFF period are respectively the rolling tires. It is set as the rotation speed of 3f and 3r. As the ON period is increased with respect to the OFF period, the average watering amount per unit time as a whole increases. Conversely, as the OFF period is increased with respect to the ON period, the average average watering quantity decreases. .
In this embodiment, the ON period and the OFF period can be set to 1, 2, or 3 rotations. However, the settable rotation speed is not limited to this and can be arbitrarily changed. It is.
Further, the solenoid valve 11 and the watering pump 13 are connected to the output side of the ECU 21, and these devices 11 and 13 are driven and controlled based on commands from the ECU 21.

Next, watering to the rolling tires 3f and 3r performed by the watering apparatus configured as described above will be described.
At the start of pavement work or the like, the operator performs a setting operation of the mode selection switch 23 in advance. For example, when the pavement material adheres to the rolling tires 3f and 3r severely during work in a cold region, the mode selection switch 23 is switched to the continuous watering mode with emphasis on preventing adhesion. Further, for example, when the pavement material does not adhere so much to the rolling tires 3f and 3r due to work under hot weather, the mode selection switch 23 is switched to the intermittent watering mode with emphasis on water saving.

Further, when the intermittent watering mode is selected, the operator performs a setting operation of the intermittent setting switch 24. For example, although it does not require continuous watering, when the amount of pavement material adhering to the rolling tires 3f and 3r is relatively large, the ON period is set to 3 rotations and the OFF period is set to 1 rotation. Conversely, when the amount of pavement material attached is extremely small, the ON period is set to 1 rotation and the OFF period is set to 3 rotations. Further, in the case of an adhesion amount intermediate between both, the ON period and the OFF period are set to the same rotation speed.
Hereinafter, the description will be continued assuming that the intermittent watering mode is selected and both the ON period and the OFF period are set to two rotations.

The ECU 21 executes the intermittent watering control routine shown in FIG. 3 at a predetermined control interval when the intermittent watering mode is selected. The ECU 21 when executing this routine functions as the watering control means of the present invention.
First, in step S2, it is determined whether or not the tire roller 1 is traveling. When the determination is No (No), the routine is temporarily terminated. When the road surface compaction operation is started and the tire roller 1 starts, a Yes (Yes) determination is made in Step S2 and the process proceeds to Step S4. In step S4, the vehicle traveling speed V is calculated from the wheel speed detected by the wheel speed sensor 22, and it is determined whether or not the traveling speed V is equal to or higher than a preset lower limit speed V0 (for example, 1 km / h). . When the determination is No, the routine is temporarily terminated. When the determination is Yes, the process proceeds to step S6. In step S6, the electromagnetic valve 11 is opened to spray water from the watering nozzles 9f and 9r, and it is determined whether or not the ON period has elapsed since the start of watering in the subsequent step S8.

For the determination process of the ON period in step S8 and the determination process of the OFF period in step S12 described later, the ECU 21 determines the rear rolling tire 3r based on the detection information from the wheel speed sensor 22 while the tire roller 1 is traveling. The rotation angle is determined, and the process for determining the cycle of one rotation of the rear rolling tire 3r from the determination result is always executed. Based on the determined cycle of one rotation, it is determined that the ON period has elapsed when the rear rolling tire 3r has rotated by the number of rotations set corresponding to the ON period, and is set corresponding to the OFF period. It is determined that the OFF period has elapsed at the time when the rear rolling tire 3r has rotated by the number of rotations. The number of rotations in this example is both 2 rotations.
Since the front roller tire 3f and the rear roller tire 3r are set to the same diameter and rotate synchronously, the rotation period of the rear roller tire 3r determined based on the wheel speed, the ON period, and The OFF period is also a period of one rotation of the front rolling tire 3f, an ON period, and an OFF period.

  When the rolling tires 3f and 3r have not yet rotated twice and the ON period has not elapsed, the ECU 21 makes a No determination in step S8, returns to step S6, and repeats the processes in steps S6 and S8. Then, when the rolling tires 3f, 3r rotate twice and the ON period has elapsed, the determination of Yes is made in step S8, the process proceeds to step S10, the electromagnetic valve 11 is closed, and the water spray nozzles 9f, 9r Stop watering. Thereafter, it is determined whether or not the OFF period has elapsed since the watering was stopped in Step S12. If No, the process returns to Step S10 and repeats the processes in Steps S10 and S12. When the rolling tires 3f and 3r rotate twice and the OFF period has elapsed, the determination is Yes in step S12 and the routine is terminated. Even when the routine is started again, if the conditions of steps S2 and S4 are satisfied, the processes of steps S6 to S12 are executed as described above.

  Further, when the traveling speed V decreases during traveling of the tire roller 1 and becomes less than the lower limit speed V0, a determination of No is made in step S4 and the routine is terminated. Therefore, in this case, the solenoid valve 11 is not opened not only during the OFF period but also during the ON period, and watering is substantially stopped.

FIG. 4 is a time chart showing the watering situation by the processing of the ECU 21 described above, and this watering situation is common to the front rolling tire 3f and the rear rolling tire 3r.
During the ON period in which the front and rear compaction tires 3f, 3r rotate for the first two rotations after the tire roller 1 starts by the start of compaction work, the electromagnetic valve 11 is opened and the water spray nozzle 9f is turned on. , 9r is sprayed to the rolling tires 3f, 3r. During the OFF period in which the rolling tires 3f and 3r rotate for the next two rotations, the electromagnetic valve 11 is closed and watering from the watering nozzles 9f and 9r is stopped. With the above as one cycle, during the rotation of the rolling tires 3f and 3r accompanying the running of the tire roller 1, the watering by the watering nozzle is repeated and stopped every two rotations of the rolling tires 3f and 3r.
Since both the ON period and the OFF period are set to 2 rotations, the average watering amount per unit time at this time is half of the watering amount during the ON period. Naturally, if the ratio between the ON period and the OFF period is changed, the average watering amount can be increased or decreased accordingly.

  The water spray amount per unit time from the water spray nozzles 9f and 9r is constant, and the water spray is performed over the ON period in which the roller compact tires 3f and 3r rotate by two rotations. The amount of water sprayed to the outer peripheral surface of 3r is substantially uniform in any region of the entire circumference. The traveling speed V of the tire roller 1 during the compacting operation varies depending on the working conditions, and FIG. 4 shows both the cases where the traveling speed V is 6 km / h and 3 km / h. Although the cycle of the ON period and the OFF period becomes longer as the traveling speed V becomes slower, the point that watering is performed over the ON period in synchronization with the rotation of the rolling tires 3f and 3r is different even if the traveling speed V changes. Absent.

On the other hand, since the rolling tires 3f and 3r compact the pavement material while rolling on the road surface, the adhesion state of the pavement material on the entire circumference becomes substantially uniform, and is required to prevent the adhesion. The amount of water spray is also substantially uniform over the entire circumference of the rolling tires 3f and 3r. Therefore, according to the present embodiment, only by appropriately setting the ON period and the OFF period, the water spray is uniform and optimal for the entire circumference of the rolling tires 3f and 3r, that is, the outer circumference of the rolling tires 3f and 3r. It is possible to realize a water spray amount that can prevent the pavement agent from adhering to the surface and can suppress the consumption of excess water.
And in this embodiment, the above effect is implement | achieved by employ | adopting ON / OFF type solenoid valve 11. FIG. Since this type of solenoid valve is much cheaper than, for example, a variable flow rate solenoid valve described in the technology of Patent Document 2, the manufacturing cost of the watering device can be reduced.

  On the other hand, the tire roller 1 during the compacting operation is maintained at a traveling speed V suitable for the operation, for example, 3 to 6 km / h. However, the traveling speed V may be extremely reduced beyond this speed range due to some factors. possible. Even if the amount of water sprayed per unit time is the same, when the rotational speed of the compaction tires 3f, 3r decreases with the running speed V, the amount of water sprayed onto the compaction tires 3f, 3r per rotation increases. In particular, in the intermittent watering mode, the tendency is increased because the watering is concentrated in the ON period, and at very low speed, the water is dripping. In the present embodiment, when the traveling speed V becomes lower than the lower limit speed V0, the electromagnetic valve 11 is kept closed even during the ON period to substantially stop watering. For this reason, it is possible to avoid a flowing state of water caused by an inappropriate traveling speed V, and to realize more reliable water saving.

This is the end of the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, in the said embodiment, although it actualized to the watering apparatus of the tire roller 1, the vehicle to apply is not limited to this, It can change arbitrarily. For example, the present invention may be applied to a Macadam roller having both front and rear wheels as iron wheels, or a combined roller having front wheels as iron wheels and rear wheels as rubber tires.
In the above embodiment, the continuous watering mode can be selected by the mode selection switch 23 and the intermittent period (ON period, OFF period) can be set by the intermittent setting switch 24. However, the present invention is not limited to this. For example, only the intermittent watering mode may be executed, or the intermittent period may be a fixed value set in advance. Further, the processing corresponding to the speed reduction in step S4 in FIG. 3 is not necessarily executed, and may be omitted.

Further, in the tire roller 1 of the above embodiment, since the front rolling tire 3f and the rear rolling tire 3r are set to have the same diameter, one rotation of the respective rolling tires 3f and 3r based on a common wheel speed. However, the present invention is not limited to this. For example, in a vehicle with different front and rear wheel diameters, the ON period and the OFF period may be obtained by individually determining the period of one rotation based on the respective wheel speeds.
Moreover, in the said embodiment, although the period of 1 rotation of the rolling tires 3f and 3r was determined based on the wheel speed detected by the wheel speed sensor 23, the rotation angle detection means of this invention is not restricted to this. For example, a proximity sensor is arranged on one side of the rolling tires 3f, 3r so that pulses are output from the proximity sensor at a specific angle during one rotation of the rolling tires 3f, 3r, You may make it determine as a period of 1 rotation.

1 Tire roller (vehicle)
3f Front rolling tire (rolling wheel)
3r rear rolling tire (rolling wheel)
9f Front watering nozzle (watering means)
9r rear watering nozzle (watering means)
11 Solenoid valve (watering means)
13 Watering pump (watering means)
22 Wheel speed sensor (rotation angle detection means, vehicle speed detection means)
21 ECU (watering control means)
24 Intermittent setting switch (intermittent setting means)

Claims (3)

A watering means that is disposed in the vicinity of the rolling wheel of the vehicle and sprays an appropriate amount of water set per unit time on the outer peripheral surface of the rolling wheel;
Rotation angle detecting means for detecting the rotation angle of the rolling wheel;
The rotation angle of the rolling wheel is determined based on the detection information from the rotation angle detecting means, the cycle of the rotation of the rolling wheel is determined based on the determination result, and the rolling wheel is determined based on the determined cycle of one rotation. A compacting machine comprising: a sprinkling control means configured to operate the sprinkling means and execute watering over a period in which the pressure wheel rotates by a multiple based on one rotation. Watering device. Comprising intermittent setting means for setting the multiple,
The watering device of the compacting machine according to claim 1, wherein the watering control means performs the watering based on a multiple set by the intermittent setting means. Vehicle speed detecting means for detecting the traveling speed of the vehicle,
The watering control means stops watering even during a period based on the multiple when the traveling speed detected by the vehicle speed detecting means is less than a preset lower limit speed. A watering device for a compaction machine as described in 1.

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