JPH0315607Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an automatic water sprinkling device for compaction machines such as vibrating rollers, road rollers, and tire rollers.

(Prior art) Conventionally, compaction machines such as vibrating rollers, road rollers, and tire rollers are equipped with a watering device that sprinkles water on the surfaces of the front and rear wheels. Sprinkling water on the rear wheel surface prevents asphalt from adhering to the wheel surface.

By the way, the above-mentioned compaction machine performs paving work by frequently repeating forward and backward running and stopping in connection with the asphalt laying work, but if you forget to sprinkle water while running, asphalt will be deposited on the surface of the wheels. On the other hand, if water is continued to be sprinkled even when the vehicle is stopped, the amount of water stored in the water tank will increase, and a large amount of water will be sprayed on a specific asphalt surface. It is necessary to stop watering when the vehicle is stopped, as this has a negative effect on rolling compaction.

In conventional sprinkler systems, during operation, a snap switch provided on the instrument panel turns the sprinkler pump drive motor ON or OFF to switch between sprinkling water or stopping water sprinkling.

(Problem that the invention attempts to solve) As mentioned above, the motor can be controlled by the snap switch.
Since it is designed to be turned on and off, the driver has to operate the forward/reverse travel lever while frequently switching the snap switch, which is not only extremely cumbersome, but also makes it difficult to turn the switch on while driving.
There are problems such as forgetting to do this and causing asphalt to adhere to the wheels and damaging the paved surface, or forgetting to switch when the vehicle is stopped and spraying a large amount of water on the asphalt surface, which has a negative effect on the rolling compaction of the asphalt.

In order to eliminate the above-mentioned drawbacks, the present invention has developed an automatic water sprinkling system for compaction machines that can continue to supply pressurized water when the compaction machine is running, and automatically stop the supply of pressurized water when the machine stops running. The purpose is to provide equipment.

(Means for Solving the Problem) The automatic water sprinkling device for a compaction machine according to the present invention is a water sprinkling device that sprinkles water on the wheels of a compaction machine. means is provided, and one switch means is interposed in the drive circuit of the pressurized water supply switching means, and one switch means is provided on the forward/reverse travel lever, and the switch means is closed when the travel lever is in the forward position or the backward position, and the travel lever is closed. An actuation piece is provided that opens the switch means when the travel lever is in the neutral position, and when the travel lever is in the neutral position, the pressurized water supply switching means is brought to the supply stop position and the travel lever is moved forward. The pressurized water supply switching means is configured to be in the supply position when the pressurized water supply switching means is in the position or the retracted position.

As the pressurized water supply switching means, a motor that drives the sprinkler pump may also be used, or an electromagnetic directional switching valve interposed in the piping from the sprinkler pump to the sprinkler nozzle may be used.

(Function) When the forward/backward travel lever is switched to the neutral position and the compaction machine stops traveling, the pressurized water supply switching means is switched to the supply stop position via the actuating piece and the switch means, so that the supply of pressurized water is automatically stopped. The water nozzle will no longer spray water.

Furthermore, when the travel lever is switched to the forward position or the backward position and the compaction machine starts traveling, the pressurized water supply switching means is switched to the supply position via the actuation piece and the switch means, so pressurized water is automatically supplied. Water is sprayed from the water nozzle.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

1 and 2 show a side view and a plan view, respectively, of the vibrating roller R, in which a front wheel watering nozzle 2 for sprinkling water on the front wheel 1 made of a steel drum of the vibrating roller R is provided at the front end of the vehicle body 3; A rear wheel watering nozzle 5 that sprays water on the rear wheels 4 consisting of four tire wheels is installed on the vehicle body 3.
A water tank 6 which is provided at the rear end and stores water for watering is provided at the upper part of the rear part of the vehicle body 3, a watering pump 7 is provided at the lower center of the vehicle body 3, and the water tank 6 and the watering pump 7 are connected to the suction pipe. 8, the watering pump 7 and the watering nozzles 2 and 5 are connected by a discharge pipe 9, and the discharge pipe 9 to the rear wheel watering nozzle 5 and the discharge pipe 9 to the front wheel watering nozzle 2 are each equipped with a cock 10. has been done.

Reference numeral 11 is the engine, and reference numeral 12 is the engine 11.
Reference numeral 13 is a hydraulic motor that drives the front wheels 1, and reference numeral 14 is a travel lever that controls the discharge direction and amount of discharge of the hydraulic pump.

Next, the automatic watering device for the vibrating roller R will be explained in detail with reference to FIG. 3.

The pivot portion 14a of the traveling lever 14 is pivotally connected to the instrument panel of the driver's seat so as to be able to swing back and forth, and the tip of a bracket 15 protruding from the pivot portion 14a connects to the hydraulic pump 12 via a release wire 16. The control rod 12a is operatively connected to the control rod 12a.

When the travel lever 14 is held in the substantially vertical neutral position as shown in the figure, no oil is discharged from the hydraulic pump 12 to the hydraulic motor 13 and the front wheels 1 are not rotationally driven.
When tilted in the forward direction (forward position), the hydraulic motor 13 is driven to rotate in the forward direction of the vibration roller R, and the hydraulic motor 13 is driven to rotate in the forward direction of the vibration roller R.
4 is tilted from the neutral position in the direction of arrow 17r (retracted position), the hydraulic motor 13 is discharged from the retracting outlet of the hydraulic pump 12, and the hydraulic motor 13 is rotationally driven in the retracting direction of the vibrating roller R. The discharge amount of the hydraulic pump 12 increases in accordance with the tilt angle of the travel lever 14, and the rotational speed of the hydraulic motor 13 increases continuously.

When the vibrating roller R is moving forward or backward, the water spray pump 7 automatically supplies pressurized water to the front and rear wheel water nozzles 2 and 5 to continue watering, and when the vibrating roller R has stopped, the water spray pump 7 automatically supplies pressurized water to the front and rear wheel water nozzles 2 and 5. to automatically stop the supply of pressurized water.
A limit switch 18 and a changeover switch 19 are provided in the drive circuit of the motor 7A that drives the sprinkler pump 7 as follows.

That is, the limit switch 18 is provided in conjunction with an operating piece 20 protruding from the pivot portion 14a of the traveling lever 14, and when the traveling lever 14 is in the neutral position, the detector 18a fits into the recess of the operating piece 20 and the limit switch 18 is activated. is opened, whereas when the traveling lever 14 is in a position other than the neutral position, the detector 18a is pressed by the actuating piece 20 and the limit switch 18 is closed.

The output terminal of the limit switch 18 is connected to a power supply path 21 of the motor 7A, and the input terminal of the limit switch 18 is connected to a power source 22 via a changeover switch 19.

The changeover switch 19 is a select switch that has a manual terminal 19a, an off terminal 19b, and an automatic terminal 19c on the side opposite to the power supply.
is connected to the input terminal of the limit switch 18, and the manual terminal 19a is connected to the output terminal of the limit switch 18.

When the automatic terminal 19c of the changeover switch 19 is selected, the limit switch 18 is closed when the vibrating roller R is running (when the running lever 14 is not in the neutral position), so the power supply 22
Power is supplied to the motor 7A via the changeover switch 19 and limit switch 18 to drive the watering pump 7 and supply pressurized water to the watering nozzles 2 and 5.
is in the neutral position), the limit switch 18 is open, so power is not supplied to the motor 7A and the sprinkler pump 7 is stopped.

In the above case, the motor 7 that drives the sprinkler pump 7
A also serves as pressurized water supply switching means.

In addition, the code|symbol 23 is a strainer, and the code|symbol 24 is a pot for draining water.

By the way, when the water tank 6 is arranged at the upper part of the vehicle body 3, even if the water spray pump 7 is stopped, water will flow out from the water spray nozzles 2 and 5 due to water head pressure. As shown in Figure 4, an electromagnetic switching valve 25 for opening and closing the flow path is interposed in the suction pipe 8 leading from the water tank 6 to the sprinkler pump 7, and its solenoid is connected to the output terminal of the limit switch 18. It is desirable to close the flow path when the system is stopped.

Next, a part of the above embodiment can be modified as shown in FIG.

That is, when the sprinkler pump 7 is connected to the engine 11 by a belt or the like and driven, the motor 7A cannot be controlled as in the above embodiment, so that the discharge from the sprinkler pump 7 to the sprinkler nozzles 2 and 5 cannot be controlled. It is assumed that the drive circuit of the electromagnetic directional switching valve 26 installed in the pipe 9 is switched.

The electromagnetic directional switching valve 26 is a 3-port 2-position directional switching valve, with its P port connected to the watering pump 7, its A port connected to the watering nozzles 2 and 5, and its R port connected to the return pipe 2.
7 is connected to the water tank 6, and the changeover switch 1
9 selects the automatic terminal 19c, the P port and A are connected only when the vibrating roller R is running.
A port is connected, and water is sprayed from water spray nozzles 2 and 5.

In this case, the electromagnetic directional switching valve 26 functions as pressurized water supply switching means.

Note that in place of the limit switch 18, various types of contact or non-contact switches can be used.

(Effect of the invention) As explained above, in the automatic watering device for a compaction machine according to the invention, when the running is stopped, the drive circuit of the pressurized water supply switching means is switched via the operating piece and the switch means to supply the pressurized water. Since the switching means is switched to the supply stop position, the supply of pressurized water is automatically stopped, and at the start of traveling, the drive circuit of the pressurized water supply switching means is switched via the operating piece and the switch means, so that the pressurized water supply switching means starts supplying pressurized water. The system automatically supplies pressurized water to the water nozzles.

In this way, watering is automatically stopped when the vehicle is stopped, and water is automatically sprinkled when the vehicle is running.
This eliminates the need for the operator to frequently turn the sprinkler pump on and off, making it easier to operate the compaction machine.

In addition, it is possible to eliminate the problem of a large amount of water leaking onto the asphalt due to a mistake in stopping the sprinkler pump, which has a negative effect on compaction, and saving water for irrigation. It also eliminates the problem of adhesion and damage to painted surfaces.

Furthermore, since the actuating piece only opens and closes one switch means depending on the position of the travel lever, the structure can be extremely simplified, and an automatic watering device can be constructed using this actuating piece and the switch means. This allows the structure of the device to be simplified and can be manufactured at low cost.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a side view of the vibrating roller, Fig. 2 is a plan view thereof, Fig. 3 is an overall configuration diagram of the automatic watering device, and Fig. 4 is a diagram of the automatic watering device. FIG. 5 is a partial view corresponding to FIG. 3 of the first modification, and FIG. 5 is a partial view corresponding to FIG. 3 of the second modification of the automatic watering device. R... Vibrating roller, 1... Front wheel, 2... Front wheel watering nozzle, 4... Rear wheel, 5... Rear wheel watering nozzle,
7... Water pump, 7A... Motor, 14... Forward/forward travel lever, 18... Limit switch, 2
0... Actuation piece, 25... Solenoid switching valve, 26... Solenoid directional switching valve.

Claims (1)

[Scope of Claim for Utility Model Registration] A water sprinkling device for sprinkling water on the wheels of a compaction machine, comprising a pressurized water supply switching means for intermittent supply of pressurized water sent from a watering pump to a watering nozzle, and a drive circuit for the pressurized water supply switching means. The forward/reverse travel lever is provided with an actuating piece that closes the switch means when the travel lever is in the forward or backward position and opens the switch means when the travel lever is in the neutral position. and through the actuating piece and the switch means, the pressurized water supply switching means is set to the supply stop position when the traveling lever is in the neutral position, and the pressurized water supply switching means is supplied when the traveling lever is in the forward position or the backward position. An automatic watering device for a compaction machine, characterized in that it is configured to