JPH0443023Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a backpack-type power sprayer, by arranging a part of the passage between the drug tank and the pump along the backrest. The back rest is cooled by the chemical solution flowing through the passage, and the back rest has a special structure to prevent the worker from sweating on his or her back during work.

[Conventional technology]

In the conventional backpack power sprayer shown in Fig. 3, a pump b is attached to an engine a.
It is set on stand c. The chemical liquid in the chemical liquid tank d is sucked into the inside of the pump b via the water suction hose e, and is discharged to the outside from the discharge port f. At this time, a part of the chemical liquid discharged to the outside is returned to the chemical liquid tank d through the surplus water hose g as surplus water. The back support h is screwed to the chemical liquid tank d and the stand c, and the backpack band i is similarly attached to the chemical liquid tank d.
It is fixed with screws.

[The problem that the idea attempts to solve]

With the conventional back support as described above, the polyurethane foam J is simply covered with a vinyl sheet K, so if you carry the back-mounted power sprayer on your back and work for a long time, the part where your back and the back support H come into contact may be damaged. There were problems such as the air becoming stuffy, sweating on the back, and discomfort for the workers.

[Means to solve the problem]

Here, in order to solve the problems of the conventional products mentioned above, this invention has a back support 5 on the backpack side of a frame 1 that is integrally formed with a chemical tank 2 and on which an engine 3 and a pump 4 are mounted. In the attached backpack power sprayer, a first passage 6 and a second passage 7 are arranged side by side in a meandering manner on the surface of the back support 5 that contacts the back of the worker, and the first passage 6 is Chemical tank 2
to the suction port 11 of the pump 4, and the second passage 7 communicates from the overflow port 12 of the pump 4 to the chemical liquid tank 2, respectively, and the chemical liquid in the chemical liquid tank 2 is transferred to the first passage 6 by driving the engine 3. inner and second
We propose a back support device for a backpack power sprayer that is capable of cooling the side surface of the back support 5 by circulating the inside of the passage 7, and in implementing the device, the first passage 6 is The second passage 7 is arranged in a zigzag shape from top to bottom and is connected to the suction port 11 of the pump 4, and the second passage 7 is connected to the spill port 12 of the pump 4, and is arranged in a zigzag shape from the bottom to the top; The other ends of these passages are connected to the chemical liquid tank 2 and the pump 4 so that the flow direction of the chemical liquid in these passages is reversed, or between the respective passages forming the first passage 6 and the second passage 7, It is intended to provide a cushion in which a cushion 8 is interposed or in which the first passage 6, the second passage 7, and the cushion 8 are integrally molded.

[Effect]

In the back support device of this invention having the above configuration, the surface of the back support that the worker's back comes into contact with is cooled by the chemical liquid flowing in the passage provided along the back support.

〔Example〕

Next, this invention will be explained in detail with reference to FIGS. 1 and 2.

In the figure, 1 is a frame body integrally molded with a chemical liquid tank 2, and an engine 3 and a pump 4 are mounted on this frame body 1.
This frame 1 is equipped with and can be carried on one's back.
A back support 5 is attached to the back side. pump 4
sucks the chemical liquid through the suction port 11 and discharges it from the discharge port 14 to the nozzle 13 with an on-off valve. Further, a spill port 12 is branched from the discharge port 14 and communicates with the discharge port 10 of the pump 4 via the second passage 7.
This back support 5 consists of two hoses 6 and 7 arranged one above the other in a meandering manner with a gap between them, and the gap is filled with a cushion 8 such as polyurethane foam, and a vinyl sheet, etc. The hose 6 is covered with a cover 9, and one end of the hose 6, which constitutes the first passage, is communicated with the outlet 10 of the chemical tank 2, and the other end is communicated with the suction port 11 of the pump 4. be done. On the other hand, the second
One end of the hose 7, which constitutes a passage, is communicated with the water outlet 12 of the pump 4, and the other end is communicated with the chemical tank 2. In the figure, 13 is a nozzle connected to the discharge port 14 of the pump 4, and 15 is a shoulder strap.

In the above configuration, when starting the engine 3 and spraying the chemical liquid from the nozzle 13, the chemical liquid tank 2
The medicinal solution inside first flows through the back support 5 in a meandering manner through the first passage formed by the hose 6, is sucked into the pump 4 through the suction port 11, and is added by the pump 4. It is pressurized and ejected from the nozzle 13 via the discharge port 14 to perform the spraying operation. At this time, a part of the chemical solution that has not been ejected from the nozzle 13 enters the second passage formed by the hose 7 from the spillway port 12, flows in a meandering pattern inside the back support 5, and returns to the chemical solution tank 2. be returned. In this way, since the chemical liquid circulates in the hoses 6 and 7 by flowing in opposite directions, the back support 5 itself is always cooled by the chemical liquid, and therefore the backpack power sprayer is Even if workers carry it on their backs and work for long periods of time, their backs will not get stuffy and they will not sweat.

In addition, for practical purposes, it may be considered to integrally mold the hoses 6 and 7 forming the first and second passages and the cushion 8.

[Effect of idea]

The above-described device of this invention provides the following practical effects. In other words, by placing a part of the piping connecting the chemical solution tank and the pump along the surface of the back support that the worker's back touches, the chemical solution is circulated within the back support, making the back support easier to use. It is cooled, so that the worker can work comfortably without sweating on his or her back during work.

The first passage and the second passage are arranged in parallel and in a meandering shape, and a negative pressure is applied in the first passage.
Since positive pressure acts within the second passage, by arranging these passages in parallel, it is possible to prevent the first passage from being crushed.

Because the medicinal solution circulates inside the back support, when the medicinal solution runs out, the back feels uncomfortable, and you can tell that the medicinal solution has run out.

Since the chemical liquid can also be placed inside the backpack, a larger amount of chemical liquid can be filled compared to conventional backpack power sprayers.

[Brief explanation of drawings]

FIG. 1 is a side view of a backpack power sprayer to which this invention is applied, FIG. 2 is a front view of its main parts, and FIG. 3 is a side view showing the conventional structure. In the figure, 1...frame body, 2...chemical tank, 3...engine, 4...pump, 5...backrest, 6...hose (first passage), 7...hose (second passage), 8... cushion, 10... discharge port, 11... suction port, 12... spillage port, 14...
It is a discharge port.

Claims (1)

[Scope of claims for utility model registration] 1. The engine 3 is integrally molded with the chemical liquid tank 2.
In the backpack-powered spray machine, a back support 5 is attached to the back side of a frame 1 that can be carried on the back, and a pump 4 is mounted on the back. A passage 6 and a second passage 7 are arranged side by side in a meandering manner, with the first passage 6 leading from the chemical tank 2 to the suction port 11 of the pump 4, and the second passage 7 leading from the spill port 12 of the pump 4. Chemical tank 2
By driving the engine 3, the chemical liquid in the chemical liquid tank 2 is caused to flow through the first passage 6 and the second passage 7, so that the sides of the back support 5 can be cooled. Back support device for backpack power sprayer. 2 The first passage 6 is arranged in a meandering manner from top to bottom and is connected to the suction port 11 of the pump 4, and the second passage 7 connected to the spillage port 12 of the pump 4 is arranged from bottom to top. A backpack power supply as claimed in claim 1 of the utility model registration claim, which is arranged in a zigzag manner and is connected at its other end to a chemical liquid tank 2 and a pump 4, respectively, so that the flow direction of the chemical liquid in these passages is opposite to each other. Spray machine back support device. 3. The back support device for a backpack power sprayer according to claim 1, wherein a cushion 8 is interposed between each of the passages forming the first passage 6 and the second passage 7. 4. The back support device for a backpack power sprayer according to claim 3, wherein the first passage 6, the second passage 7, and the cushion 8 are integrally molded.