JP2001129447A - Electrically driven sprayer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that, when a valve is adjusted and spraying work is resumed after interrupting spraying work once, extermination unevenness is apt to be generated before a prescribed ejection quantity is attained in an electrically driven sprayer provided with a spraying body composed of a liquid chemical tank, a motor, a pump, a battery and a frame material, a spraying rod and a spraying hose connecting the spraying rod with the pump. SOLUTION: The spraying rod is provided with a transmitter 21 and a transmitting switch 24 for transmitting a control signal of the motor 4 by wireless, an adjusting member 36 which can control liquid chemical ejecting quantity independently on the transmitting switch 24, and a counter flow preventing member 37 for preventing liquid chemical sagging. Further, the spraying body is provided with a receiver 6 for receiving the control signal by wireless and a motor driving control circuit 11 for controlling the motor 4 by a received control signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for facilitating operation and work by arranging a receiver on a main body of an electric sprayer and a transmitter on a spray rod.

[0002]

2. Description of the Related Art Conventionally, a spraying operation has been carried out using a backpack type electric sprayer. The electric sprayer has a motor, a pump, a battery, and a chemical solution tank arranged on a backpack frame, and an output of the motor is provided. The drive shaft of the pump for pumping chemical liquid is connected to the shaft, the suction port of the pump communicates with the chemical tank,
The discharge port of the pump was connected to the nozzle of the spray rod via a spray hose or the like.

[0003] The start and end of the spraying operation have been performed by opening and closing a valve provided on a grip of the spray rod while the motor is constantly driven. Or
An ON / OFF switch interlocked with the opening / closing operation of the valve is provided, and the ON / OFF switch is connected to the drive circuit of the motor via an electric wire.
The spraying operation is performed by driving or stopping the motor via the FF switch.

[0004]

However, any of the above techniques has the following problems. In other words, when the operation is temporarily stopped for replenishing the chemical solution, changing to a different type of chemical solution, moving the spraying place, and then adjusting the valve again to restart the spraying operation, the former technique requires a predetermined discharge amount. It takes a long time to operate the valve until the pressure reaches, and in the latter technique, in addition to the valve operation, it takes time to settle to a predetermined discharge pressure after the motor starts to be driven. As described above, there has been a problem that the discharge amount is insufficient or excessive, and the control unevenness easily occurs.

[0005] Further, even when it is necessary to spray in a difficult-to-access place or in a high position, uniform spraying is difficult because the discharge distance can only be adjusted by increasing or decreasing the discharge pressure due to the valve opening. There were also problems.

In particular, in the latter technique, since the switch provided on the grip and the motor drive circuit provided on the main body are connected via electric wires, the electric wires may be caught at the time of work, storage, transportation, or the like. When the nozzle is swung in the spraying work, it hinders the work, and the connection between the hose and the grip or the part connecting the hose and the main body is likely to cause poor contact. In the case where the hose is disconnected or the spraying distance becomes long, the hose and the electric wire must be replaced at the same time, resulting in an increase in cost.

[0007]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in claim 1,
In an electric sprayer including a chemical liquid tank, a motor, a pump, a battery, and a spray body composed of a frame material, a spray rod, and a spray hose connecting the spray rod and the pump, the spray rod includes the motor A transmitter and a transmission switch for wirelessly transmitting the control signal of the control signal, an adjustment member capable of controlling the amount of chemical solution discharged independently of the transmission switch, and a backflow prevention member for preventing dripping of the chemical solution, The spray main body is provided with a receiver for wirelessly receiving the control signal, and a motor drive control circuit for controlling a motor by the reception control signal.

According to a second aspect of the present invention, the adjusting member according to the first aspect uses a ball valve type flow regulating cock.

According to a third aspect of the present invention, the transmission switch or the transmitter according to the first or second aspect is provided with a transmission control circuit capable of transmitting a variable control signal, and operating the transmission switch via the transmission control circuit. The motor speed is controlled based on the variable control signal transmitted by the controller.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an overall front view of an electric sprayer of the present invention, FIG. 2 is a partial cross-sectional side view of a grip, FIG. 3 is a side cross-sectional view of a flow control cock, FIG. 4 is a plan view thereof, and FIG. FIG. 6 is a side sectional view of another type of check valve, FIG. 7 is a front view of a valve body of another type of check valve, and FIG. 8 is a diagram showing a state in which an extension hose is connected to perform work. FIG. 9 is a control block diagram of the present invention, FIG. 10 is a control block diagram of another embodiment, and FIG.

First, the overall configuration of the electric sprayer according to the present invention will be described with reference to FIG. A chemical tank 2 is integrally formed on an upper part of a shoulder frame 1 constituting a frame made of a synthetic resin or the like. Is arranged. A spray hose 14 is provided at the discharge port of the pump 5.
Through the spray rod 15. 9 is an antenna connected to the receiver, 10 is a main switch arranged on the side of the backpack frame 1, 8 is a voltage indicator, 17 is a jack connection, and an adapter is connected to the jack connection 17 as shown in FIG. (AC / DC converter) Connected to a 100 V power supply via 19 to charge the battery 3 or to drive the motor 4 with the adapter 19 connected when the battery 3 is discharged or when working long hours. I have to.

Next, the electric sprayer and the overall control configuration will be described with reference to FIG. 1, FIG. 8, FIG. 9, and FIG.
As shown in FIGS. 1 and 9, the drive shaft of the pump 5 is connected to the output shaft of a motor 4, the motor 4 is connected to a motor drive control circuit 11, and the electric power from the battery 3 is supplied to the motor drive control circuit 11. To drive the motor 4. A main switch 10 is interposed between the battery 3 and the motor drive control circuit 11, a receiver 6 is connected to the motor drive control circuit 11, and the motor drive control circuit 11 drives and stops the motor 4. I have control.

The suction port of the pump 5 communicates with the chemical tank 2 through a hose or the like, and the discharge port has a hose 7.
Is connected to the outlet 12 and the pressure setting valve 13 through
The outlet 12 is provided on the side surface of the backpack frame 1 so that it can be connected to the spray hose 14. The secondary side of the pressure setting valve 13 is connected to a spill hose, and the other end of the spill hose is connected to the chemical tank 2. Therefore, the pump 5
When the discharge pressure exceeds the set pressure, the pressure is returned from the spill hose to the chemical tank 2 via the set valve 13.

Further, the other end of the spray hose 14 is connected to a grip 16 of a spray rod 15, and the grip 16 has a transmitter 21 for transmitting a control signal for turning on and off the motor 4. A switch 24 and a flow rate adjusting cock 36 for controlling the discharge amount of the chemical solution are formed, and the tip of the grip 16 is connected to the injection rod 22. A nozzle 23 is disposed at the tip of the injection rod 22, and a check valve 37 is disposed between the nozzle 23 and the flow rate adjusting cock 36 to prevent the liquid from dripping. The spray hose 14 is detachably connected to the grip 16 and the outlet 12 by screwing, connecting members, or the like.

In this manner, since the transmission switch 24 is configured to be able to transmit wirelessly to the motor drive control circuit 11, it can be easily stored, transported, etc., and the spray port can be directed in any direction during spraying work. As a result, the workability is greatly improved, and further, since only the spray hose 14 needs to be replaced, the cost for maintenance management can be reduced.

In particular, wireless transmission is effective when performing a large amount of spraying work or when the sprayer must be lifted to a high position. Even in such a work, the spraying work can be performed without deteriorating the workability. So that you can do it. That is, as shown in FIG. 8, the spraying operation can be performed by simply installing the sprayer main body at an arbitrary position, replacing and connecting the spraying hose 14 with the extension hose 26, and using the spraying rod 15 as it is. Since it is possible to perform the operation very easily without disturbing the electric wire during the operation, there is no need to prepare an extension hose with the electric wire again, and the normal hose can be used as it is.

Next, each control member according to the present invention will be described with reference to FIGS. As shown in FIG.
The transmitter 21 is provided in a transmission circuit 38, and a battery 25 such as a button battery is incorporated in the transmission circuit 38, and the transmitter 21 is operated by the battery 25. The transmitter 21 is connected to the transmission switch 24 and turns the transmission switch 24 ON / OF.
By performing F, a control signal is transmitted from the transmitter 21 to the receiver 6. In the present embodiment, the signal is transmitted between the transmitter 21 and the receiver 6 using radio waves, but it is also possible to use a sound wave, an infrared ray, or the like.

Further, the flow rate adjusting cock 36 is disposed near the transmission switch 24. As shown in FIGS. 3 and 4, the flow control cock 36 is connected to the grip body 16.
a, and the outside of the flow control cock 36 is constituted by a valve box composed of a valve box outer main body 40 and a valve box inner main body 41. The shaft tube portion 45 is press-fitted, and the valve shaft 4 is
3 is rotatably supported.

The lower end of the valve stem 43 has a through hole 4
A ball-shaped valve body 42 having a valve body 2a is fixed.
Numeral 2 is rotatably contained in the valve box inner body 41. On the other hand, a stopper 46 is externally fitted and fixed in the middle of the upper and lower portions of the valve stem 43, and an extending portion 46 a extends in the circumferential direction from the stopper 46, and a projection is formed from the upper surface of the valve box outer main body 40. 40a and 40b are 90
The extended portion 46a is engaged with a side surface of the protrusions 40a and 40b, and a lever 39 is provided at a corner 43a at an upper end of the valve stem 43.
Is externally fitted, and the upper end thereof is fastened and fixed with a nut 44 or the like.

In such a configuration, the rotation range of the valve stem 43 is restricted within 90 degrees, which is the rotation range of the stopper 46. Therefore, the levers 39 fixed to the upper and lower ends of the valve stem 43, The valve body 42 is also in the fully open position 39a and the fully closed position 3
9b, the through hole 42a of the valve body 42 is parallel to the liquid passage 47 at the fully open position 39a, and the cross-sectional area of the liquid flow is maximum. Hole 4
2a is orthogonal to the liquid path 47, and the liquid path 47 is completely shut off. That is, by operating the lever 39, the opening degree of the through hole 42a is adjusted to freely change the flow rate of the chemical solution, so that the discharge amount from the nozzle 23 can be adjusted. In the present embodiment, as the flow control cock 36,
Although the ball valve type using the ball-shaped valve body 42 was used, any material may be used as long as it has a simple structure, has few malfunctions, and can reliably change the flow rate, and is not particularly limited.

A check valve 37 is provided between the flow control cock 36 and the nozzle 23.
As shown in FIG. 5, the outside of the check valve 37 is formed by a valve box 52. Inside the valve box 52, a through-hole 51 is formed in a side surface in a cylindrical shape.
a is included, and the valve body 51 is
The end face 51a of the valve element 51 on the chemical solution inflow side is biased by an urging spring 53 in the valve body 2.
Are pressed by a pedestal 52a formed on the inner surface of the valve box 52.

In such a configuration, while the chemical is being pumped by the pump 5, the end face 51 is pressed by the pumping pressure.
a is separated from the pedestal 52a against the biasing spring 53, the inside of the check valve 37 is in a communicating state, and the chemical solution flows out to the nozzle 23 side through the through hole 51a. When the pumping of the chemical is turned off and the pumping of the chemical is interrupted, the end face 51a is pressed by the pedestal 52a by the urging spring 53 and the inside of the check valve 37 is closed. The so-called "drip" in which the chemical liquid leaks out from the nozzle 23 without flowing out to the side can be completely prevented.

Here, another embodiment of the check valve 54 will be described. As shown in FIGS. 6 and 7, the check valve 54 includes a valve box 55 forming an outside, and a valve body 56 pressed in the valve box 55 via a valve presser 57. The valve body 56 has a disk shape in a front view, and includes a frame body 56a and a valve portion 56b made of an elastic body having a shape in which the disk is cut in the radial direction.

Therefore, while the chemical is being pumped by the pump 5, the valve portion 54b made of an elastic material is pressed by the pumping pressure.
As shown by the dotted line in FIG. 6, the chemical liquid is elastically deformed and flows out to the nozzle 23 through the gap. However, when the transmission switch 24 is turned off to stop the pumping of the chemical liquid, the valve portion 54b itself The gap is closed by the restoring force of the valve and the inside of the check valve 54 is closed.
In the same manner as described above, "drip" can be prevented. In addition,
Compared with the non-return valve 37, the structure is simple, operation failure is unlikely to occur, and even if operation failure occurs, the valve body can be easily replaced.

In the above configuration, the control operation in the actual work will be described with reference to FIGS. That is, the spraying operation is started after the main switch 10 and the transmission switch 21 are turned on, the discharge amount is adjusted to the set amount by using the flow rate adjusting cock 36, and when the operation is interrupted, the flow rate adjustment is performed. The cock 36 is left as it is, and only the transmission switch is turned off.

When resuming the spraying operation after replenishing the drug solution, changing to a different type of drug solution, moving the spraying place, etc., the flow control cock 36 is left as it is and the transmission switch 2 is left.
By turning ON only 1, only the pumping of the chemical solution is restarted. Then, as shown by the discharge curve A in FIG. 11, the discharge amount immediately returns to the set amount before the resuming of the spraying operation, and the shortage or excess of the discharge amount of the chemical solution can be eliminated, and the uniform control work can be performed. You can do it.

Here, instead of the transmission switch 21 capable of transmitting only ON / OFF control signals, a transmission control circuit 58 such as a variable resistor or a potentiometer is provided to transmit a variable control signal. Transmission switch 59
By operating the transmission switch 59, a signal may be input to the motor drive control circuit 11 to drive the motor 4 at a predetermined rotation speed.
At this time, the motor drive control circuit 11 is also connected to an actuator 31 for adjusting the set pressure of the pressure setting valve 13.

With this configuration, even during the spraying operation, it is possible to easily change the discharge pressure and adjust the discharge distance and the discharge amount by operating the transmission switch 59. It is possible to spray evenly at the position, and fine adjustment of the spraying condition according to the situation of the spraying place can be achieved.

[0029]

As described above, the present invention has the following advantages. That is, as in claim 1, an electric sprayer including a spray main body composed of a chemical solution tank, a motor, a pump, a battery, and a frame material, a spray rod, and a spray hose connecting the spray rod and the pump. In the spray rod, a transmitter and a transmission switch for wirelessly transmitting the control signal of the motor, an adjusting member capable of controlling the discharge amount of the liquid medicine independently of the transmission switch, and a liquid dripping prevention A backflow prevention member for the spraying main body, and a receiver for wirelessly receiving the control signal, and a motor drive control circuit for controlling a motor by the reception control signal are provided on the spray main body, so that replenishment of a chemical solution or the like is provided. Therefore, even when the spraying operation is resumed after the operation is temporarily stopped, the discharge amount can be reduced to a level before the spraying operation is resumed by turning ON only the transmission switch while keeping the opening degree of the adjusting member unchanged. Quickly restored to the amount, it is possible to perform uniform control tasks. In addition, since wires are not required, it is easy to store, transport, etc., and the spray port can be oriented freely in spraying work, greatly improving workability, and further reducing the cost of wire-related maintenance management. Can be reduced. In particular, even when performing a large amount of spraying work or when it is necessary to lift the sprayer to a high position, the work can be performed without lowering the workability.

As described in the second aspect, the adjusting member according to the first aspect uses a ball valve type flow rate adjusting cock, so that the structure is simple, the malfunction is small, and the flow rate can be reliably changed only by operating the lever. be able to.

According to a third aspect of the present invention, the transmission switch or the transmitter according to the first or second aspect is provided with a transmission control circuit capable of transmitting a variable control signal, and the transmission switch is connected via the transmission control circuit. Since the number of rotations of the motor is controlled based on the variable control signal transmitted by the operation,
Even during the spraying operation, the discharge distance and the discharge amount of the chemical solution can be easily adjusted, and fine spray conditions can be adjusted according to the situation of the spray place.

[Brief description of the drawings]

FIG. 1 is an overall front view of an electric sprayer according to the present invention.

FIG. 2 is a partial side sectional view of a grip.

FIG. 3 is a side sectional view of a flow control cock.

FIG. 4 is a plan view of the same.

FIG. 5 is a side sectional view of a check valve.

FIG. 6 is a side sectional view of a check valve according to another embodiment.

FIG. 7 is a front view of a valve body of a check valve of another embodiment.

FIG. 8 is a view showing a state in which an extension hose is connected to perform work.

FIG. 9 is a control block diagram of the present invention.

FIG. 10 is a control block diagram of an example of another embodiment.

FIG. 11 is an explanatory diagram relating to a change with time of a chemical solution discharge amount.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame material 2 Chemical tank 3 Battery 4 Motor 5 Pump 6 Receiver 11 Motor drive control circuit 14 Spray hose 15 Spray rod 21 Transmitter 24/59 Transmission switch 36 Adjustment member 37 Backflow prevention member 58 Transmission control circuit

Claims (3)

[Claims] 1. An electric sprayer comprising: a spray body composed of a chemical tank, a motor, a pump, a battery, and a frame member; a spray rod; and a spray hose connecting the spray rod and the pump. A transmitter and a transmission switch for wirelessly transmitting the control signal of the motor, an adjusting member capable of controlling a chemical solution discharge amount independently of the transmission switch, and a backflow prevention for preventing a dripping of the chemical solution A sprayer body, and a receiver for wirelessly receiving the control signal, and a motor drive control circuit for controlling a motor based on the received control signal. 2. The electric sprayer according to claim 1, wherein a ball valve type flow rate adjusting cock is used as the adjusting member. 3. The transmission switch or the transmitter is provided with a transmission control circuit capable of transmitting a variable control signal, and based on the variable control signal transmitted by operating the transmission switch via the transmission control circuit, a motor of the motor is controlled. 3. The electric sprayer according to claim 1, wherein the number of revolutions is controlled.