JPS6261347B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a backpack-type power sprayer, and its purpose is to allow the backpack-type power sprayer to be lowered from the operator's back as needed to create a portable stationary power sprayer. Another purpose is to be able to automatically absorb water into a backpack tank, and also to be able to automatically mix and stir the chemical solution and water by simply operating the valve levers. That's true.

A backpack-type power sprayer consists of an engine, a pump, a backpack tank that holds the chemical solution, and a backpack carrying them.The tank is filled with the chemical solution in advance, and the worker carries it on his or her back and sprays the chemical solution onto fields, etc. from the nozzle. It is useful for small-scale spraying operations. However, when carrying out work by filling a backpack tank with a chemical solution and carrying it on one's back, the worker must constantly support the weight, causing unexpected fatigue to the worker. Furthermore, when the amount of spraying is large, the chemical solution must be replenished into the backpack tank many times, which causes considerable fatigue to the worker due to the heavy weight and complicated work.

On the other hand, as a type of power sprayer that is different from the backpack type, only the engine and pump are integrated, and it can spray water,
The spray liquid tank is removed and water is sucked in from an external water storage tank or water tank, or in some cases from a river or pond, and mixed with a concentrated chemical solution at the pump's water inlet, and a long hose is connected to the pump's outlet. There is a portable stationary power sprayer that performs spraying work.
This solves the drawback of the former backpack type, but it does have the drawback of having to carry a long hose all the time.

As mentioned above, the backpack type and stationary type each have their advantages and disadvantages, and the current situation is that both types are used depending on the purpose and conditions of the work.

In order to take advantage of the advantages of both of the above, the present invention is based on a single backpack-type power sprayer, which can be lowered to the ground from the back of the worker and used as a portable stationary type, or can be used as a backpack type. In order to automatically draw water into your own tank, a valve is placed in the connection path between the tank on your back and the pump. There are three watering routes: a watering route from the outside tank and a watering route from the outside tank to the pump, and each can be switched by simply operating a lever. Furthermore, by directly connecting the valve of the pump discharge path to the backpack tank, it is possible to mix and stir the medicinal solution in the backpack tank without changing the valve arrangement.

The configuration of the present invention will be specifically explained below with reference to the drawings.

Figure 1 is a schematic side view of a backpack-type power sprayer.
It has both backpack and fixed position functions. In the figure, this sprayer is equipped with a backpack tank like the conventional one.
1. Consisting of a power pump 2 and a backpack 3 , the power pump is directly connected to an engine 4 below the backpack tank 1.
2 to the backpack frame 5. The backpack 3 includes a frame 5, a back support 6, and backpack bands 7, 7.

The power pump 2 includes a valve 8 inside and a lever 9 extending to the outside, and has an attachment port 11 for a water suction hose 10 from the backpack tank 1 , an attachment port 14 for a water suction hose 13 from the outer tank 12, and a discharge hose. 1
5 mounting ports 16, respectively. The discharge hose attachment port 16 is connected to a short discharge hose 15 when used as a backpack type, and connected to a long extended discharge hose 17 when used as a fixed position type. A spout 1 is provided at the tip of the discharge hose 15 or the extended discharge hose 17.
8 is installed and operated with a handy knob 19.

FIGS. 2 to 7 are route diagrams and valve operation explanatory diagrams illustrating the arrangement of valves necessary for carrying out the present invention. In these figures, T stands for the backpack tank.
OT stands for the outer tank, P stands for the pump, M stands for the engine, and the valves are shown in full alphabet as (a), (b), (c), ...... (h).

There are four types of work: (a), (b), (c), and (d) below, and in addition to (a) work that is normal for the backpack type by operating the valve, you can also perform the work (b) for the stationary type. Furthermore, it is possible to perform tasks (c) and (d).

(B) Spraying work by absorbing water from the tank on the back (back type) (B) Spraying work by absorbing water from the outside tank (stationary type) (C) Replenishing water from the outside tank to the tank on the back (d) To the tank on the back Mixing and stirring work with water supply The first route is as shown in Fig. 2, where two 2-port 2-position valves, that is, regular stopcocks a and b, are arranged, and a hand-held stopcock (2-port 2-position valve) ( Operate using 3 types c). i.e. the valve
(a) shows the valve between the backpack tank and the pump water inlet (b)
is placed between the outer tank and the pump intake port. The valve operations for each task are as follows.

Work (A): (a) Open - (b) Close - (c) Open Work (B) or (C) (a) Close - (b) Open - (c) Open However, in the case of work (C) By pushing the spout 18 into the tank from above, work (d) can be done at the same time.
Although this route is simple, it has the disadvantage that it requires the operation of two valves (a) and (b), making it cumbersome.

The second route is shown in Figure 3A, and it is only necessary to connect the outer tank and the pump, and the backpack tank and the pump using one 3-port 2-position valve (d).
It is the simplest. The structure of valve (d) is shown in Figure 3B, which shows the opening and closing paths for work (a), work (b), (c), and (d).

The third route is shown in Figure 4. In addition to the route shown in Figure 3A, a 2-port 2-position valve (e) is added in a separate route between the pump outlet and the backpack tank, and work (c) is completed. Water can be replenished by operating the valve (e) without having to insert the spout 18 into the tank. Here, since the valve (e) is directly connected to the backpack tank, the automatic mixing and stirring operation of operation (d) can be performed at the same time as operation (c). Also, if you connect it like the dotted line in the figure,
Work in (c) is possible.

The fourth route, as shown in Fig. 5, uses a 3-port 2-position valve (f) instead of valve (e) in Fig. 4, and if it is made into a dual valve of 3-port 2-position valve, , the above (a), (b), (c), (d) with one trick operation.
It has the advantage of being able to choose which work to do.

The fifth and sixth routes are examples using special valves, and FIG. 6A is a 4-port, 3-position valve (g), and FIG. 7A is a 5-port, 3-position valve (h). The passage inside the valve for operations (a), (b), (c), and (d) using valve (g) is No. 6.
They are (a), (b), and (c) in Figure B, and those due to valve (h) are (a), (b), and (c) in Figure 7B. In these routes, piping used only on the return side from the backpack tank may be provided to the valve, and in this case, each valve may be increased by one port to form a 5-port, 3-position or 6-port, 3-position valve. By doing this, automatic water supply and automatic stirring can be performed at the same time as in the fourth and fifth routes. However, the structure of the valve becomes complicated. All of these require a single lever operation, and even if the spout is located far away, it is convenient because you can refill the tank on your back with just a simple operation.

As detailed above, in the conventional backpack-type power sprayer, a valve is placed in the connection path between the backpack tank and the pump, and the water supply route from the external tank to the backpack tank via the pump, and the pump from the backpack tank. There are 3 routes: one for watering through the tank, and one for watering from the outside tank via the pump, and it can be connected to the outside tank so that it can be used as a stationary power sprayer. Automatic water supply and automatic agitation in backpack tanks have been made possible, expanding the scope of its use.In addition, the valve arrangement has been devised to allow easy lever operation for these backpack-type, stationary-type, and automatic water supply systems. The superior effects of the present invention are found in that automatic stirring can be switched.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of the backpack-type power sprayer of the present invention. 2, 3A, 4, 5, 6A and 7A are route diagrams showing the arrangement of valves necessary for carrying out the present invention, and FIG. 3B is a Figure 3A, Figure 6B are explanatory diagrams showing the structure of the valve used in the route diagram of Figure 6A, and Figure 7B is used in the route diagram of Figure 7A. (B) shows the state of use as a stationary type, (C) and (D) show the state of use when replenishing water to the backpack tank and stirring and mixing, respectively. 1 ... Back tank (T), 2 ... Power pump (P), 3 ... Back pack, 4... Engine (M), 8
...Valve (a), (b), (d) ~ (h), 9 ... Lever, 10
... Water absorption hose, 13 ... Water absorption hose, 15 ...
Discharge hose, 17... Extension discharge hose, 18...
Fountain, 19...Kottoku at hand (c).

Claims (1)

[Scope of Claims] 1. In a backpack-type power sprayer consisting of a backpack tank, a power pump, and a backpack carrier, a valve is disposed in the connection path between the backpack tank and the pump to allow water to flow from the external tank to the backpack tank via the pump. A backpack-type power sprayer characterized by having three routes: a water supply route, a water sprinkling route from the backpack tank via the pump, and a water spray route from the outer tank via the pump. 2. The backpack-type power sprayer according to claim 1, wherein the valve arrangement is such that two 2-port, 2-position valves are connected between the outer tank and the pump and between the backpack tank and the pump. 3. The backpack-type power sprayer according to claim 1, wherein the valve arrangement is such that the outer tank and the pump and the backpack tank and the pump are respectively connected by a single 3-port 2-position valve. 4. The arrangement of the valves is as described in claim 1, in which the outer tank, the pump, and the backpack tank are connected by a 3-port, 2-position valve, and the pump outlet and the backpack tank are connected by a 2-port, 2-position valve. A backpack-type power sprayer. 5. The backpack-type power sprayer according to claim 1, in which the valve arrangement is such that two 3-port, 2-position valves are connected to an outer tank, a pump, a backpack tank, a backpack tank, a pump discharge port, and a discharge hose. . 6. The backpack-type power sprayer according to claim 1, wherein the valve arrangement is such that a 4-port, 3-position valve is connected to an outer tank, a backpack tank, a valve intake port, a discharge port, and a discharge hose. 7. The backpack-type power sprayer according to claim 6, in which the valve arrangement is a 5-port, 3-position valve.