JPH027652Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention includes an engine, a chemical storage tank, a pump connected to the chemical storage tank and driven by the engine, and a pump connected to the pump via a pressure regulating valve. The present invention relates to a power sprayer having a discharge passage and a spillage passage led out from the pressure regulating valve.

[Prior art]

With conventional power sprayers of this type, the spraying nozzle is carried around while pulling out the hose from the winding drum, so one person is performing the spraying work in a location away from the power sprayer, and when the work is stopped or finished, In order to keep the engine at low speed (idling) and lower the pump discharge pressure, it was necessary to go back to the power sprayer and operate it, which was extremely difficult for one person to do. Since the spray nozzle closes when work is stopped or completed, there is no need to run the engine at high speed (under load) and increase the pump discharge pressure.In fact, this wasteful load operation reduces engine fuel efficiency and further Since the lifespan of the engine and pump will be shortened, it is necessary to immediately lower the engine speed and lower the pump discharge pressure when stopping or finishing work.

[Summary of the idea]

This idea was made to eliminate the above-mentioned drawbacks of conventional power sprayers, and by making it possible to remotely control engine speed and pump discharge pressure, it can be easily and effectively done by one person. The purpose of the present invention is to provide a power sprayer that can perform spraying work.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 1 to 4. In the figure, 1 is a chemical storage tank mounted on a light truck 2, 3 is an engine built into the main machine frame 4, and 5 is a pump driven by the engine 3 and connected to the chemical storage tank 1, which is also loaded onto the light truck 2. It is incorporated into the main body machine frame 4. 6 is a discharge pipe (passage) of the pump 5; 7 is a pressure regulating valve provided on the discharge pipe 6; and 8 is a spill pipe (passage) led out from the pressure regulating valve 7, which communicates with the chemical solution storage tank 1.
9 is a bypass connecting the discharge pipe 6 and the spill pipe 8; 10
11 is a hose connected to the discharge pipe 6, 12 is a spray nozzle, and 13 is a winding drum for winding and storing the hose 11, which is built into the main machine frame 4. 14 is a portable transmitter, 15 is a receiver attached to the main machine frame 4,
It has an antenna 15a and is connected to a battery (not shown). Battery is light truck 2
A car battery may also be used. Reference numeral 16 denotes a servo motor attached to the main machine frame 4, which is operated by a signal received by the receiver 15. 17 is the servo motor 16
arm 16a and lever 10a of switching knob 10
The connection rod 18 is a throttle wire that connects the arm 16a of the servo motor 16 and the throttle 3a of the engine 3, and
It is positioned and fixed by a and 19b. Note that 20 in the figure is a manual throttle lever attached to the throttle 3a of the engine 3.

Next, the operation will be explained. Before starting the engine 3, the arm 16a of the servo motor 16 is operated in advance to the state shown by the dashed-dotted line in FIGS. lever 1
0a is positioned in the closed state indicated by the dashed-dotted line. If this is done, even if the engine 3 is started, the engine 3 will of course be idling, the pump 5 will rotate at a low speed and the discharge pressure will not increase, and the discharge in the discharge pipe 6 will be discharged from the bypass 9 into the spill pipe 8. No pressure is applied to the spray nozzle 12 side.

After doing this, the worker carries the transmitter 14, leaves the light truck 2 holding the spraying nozzle 12, and turns on the transmitter 14 when arriving at the spraying location. Receiver 15 receives this ON operation and operates arm 16a of servo motor 16 to the position shown by the solid line in FIGS.
a and the lever 10a of the switching knob 10 are respectively switched to the positions indicated by solid lines. Then, the engine 3 rotates at high speed, the pump 5 also rotates at high speed, and at the same time, the switching cock 10 is closed, so that the discharge pressure in the discharge pipe 6 increases. Therefore, a state of spraying work is entered in which the chemical solution is sprayed from the spray nozzle 12.

However, the work may be stopped due to a change of location, etc.
When the work is finished, the receiver 14 is immediately turned off. Receiver 15 that received this off operation
The arm 16a of the servo motor 16 is operated to the position shown by the dashed-dotted line in FIGS. 3 and 4, the throttle 3a of the engine 3 is set to the low speed state shown by the dashed-dotted line, and the lever 10a of the switching knob 10 is set to the open state shown by the dashed-dotted line. Switch to

In this way, the operator can change the speed of the engine 3 and the discharge pressure of the pump 5 by simply operating the transmitter 14 at hand.

The manual throttle lever 20 shown in FIG. 3 is used when the remote control system is out of order. At the same time, the throttle lever 20 is switched and operated to manually switch the throttle 3a of the engine 3. The lever 10a of the pot 10 can be directly switched manually. The switching trick 10 is shown in Figures 3 and 4.
As shown in the figure, a manual one (10A) may be separately provided in the bypass 6.

In the above embodiment, the winding drum 1 of the hose 11
If switching between driving and stopping in step 3 can be controlled remotely, even greater effects can be obtained.

[Effect of idea]

As mentioned above, this idea enables remote control of engine speed and pump discharge pressure, making it possible to perform spraying work alone at a distance from the power sprayer. When the engine is stopped or when work is finished, you can immediately operate the transmitter at hand to set the engine to low speed (idling) and lower the pump discharge pressure. The service life of the pump will not be shortened, and when spraying again, simply operate the transmitter to speed up the engine and increase the pump discharge pressure to continue spraying, making it easy and effective for one person to spray. It has the effect of making work easier.

[Brief explanation of the drawing]

Fig. 1 is a usage state diagram of the machine showing an embodiment of this invention, Fig. 2 is a schematic diagram of the machine shown in Fig. 1, Fig. 3 is a front view showing the main parts of the machine, and Fig. 4 is a diagram showing the main parts of the machine. FIG. 3 is a side view of FIG. In the figure, 1 is a chemical storage tank, 3 is an engine, 3a is a throttle, 4 is a main machine frame, 5 is a pump, 6 is a discharge passage, 7 is a pressure regulating valve, 8 is a spill water passage, 9 is a bypass,
10 is a switching knob, 10a is a lever, 14 is a transmitter, 15 is a receiver, 16 is a servo motor, 16a
is an arm, 17 is a connecting rod, and 18 is a throttle wire.

Claims (1)

[Claims for Utility Model Registration] (1) An engine, a chemical storage tank, a pump connected to the chemical storage tank and driven by the engine, a discharge passage connected to the pump via a pressure regulating valve, In a power sprayer having a spill water passage led out from a pressure regulating valve, a bypass connecting the water discharge passage and the spill water passage and having a switching point is provided, and a portable transmitter is provided to transmit the signal of this transmitter. a receiver mounted on the frame of the main machine; a motor operated by the received signal of the receiver; a throttle of the engine connected to the arm of the motor by a throttle wire; and a rod connected to the arm of the motor. A power sprayer characterized by comprising a lever connected to the switching lever. (2) The power sprayer according to claim 1, wherein the motor is a servo motor.