JPS596905Y2 - Douriyokubojiyokino tank - Google Patents

Description

[Detailed explanation of the invention] In a backpack-powered insecticide equipped with a small and lightweight internal combustion engine, such as a small two-stroke engine, fan case 2 (first
Since the engine 1 installed in Figure 1 rotates at high speed, the intake noise is high and the fatigue of the workers is very likely to increase.

This invention focuses on the fact that it is easy to integrate a relatively large-volume cavity into a part of a plastic tank, for example, and that it is easy to install a relatively large-capacity cavity because there is a space around it. The purpose of this invention is to improve the intake noise silencing effect by using the cavity as an air cleaner case and/or an air suction pipe, and will be described below with reference to the drawings.

Fig. 1 is a perspective view of an example of a conventional drug tank 3 and fuel tank 4 seen from the engine side, and Fig. 2 is a perspective view seen from the backpack frame side (in this case, the backpack support and backpack band are removed). Both tanks are attached to the fan case 2 either directly or via attachments or the like.

The air taken into the air cleaner 50 is filtered and then enters the carburetor 51, where fuel is added and the air enters the cylinder 52.

In FIG. 1, the chemical tank 3 and the fuel tank 4 are separate and independent parts, but some of the various chemical tanks made in Japan have a chemical tank and a fuel tank that are integrally formed.

Also, the tank is made of plastic and occupies a considerable amount of space, especially around the longitudinal and lateral directions.

FIG. 3 shows an embodiment in which when blowing the drug tank 3, an air suction pipe 5 that has been injection-shaped in advance is inserted and formed integrally, and when blowing the fuel tank 4, This shows an embodiment in which the air cleaner case 6, which has been injection-shaped in advance, is inserted and integrally formed. Fig. 4 is a perspective view of the power pest control machine shown in Fig. 3, seen from the backpack frame side; FIG. 5 shows a horizontal cross section of FIG. 3, and in FIG. and is connected from the discharge port side to the suction port side of the air cleaner case 6 via a rubber pipe 8.

A cylindrical element 26 made of polyurethane foam is inserted into the cavity 25 of the air cleaner case 6, and is connected to the carburetor 51 of the engine 1 (FIG. 3) through a rubber pipe 9 on the discharge port side.

The clean air that is sucked in from the air suction port 20 and passed through the element 26 after being muffled by the air suction pipe 5 is supplied directly to the carburetor 51 through the rubber pipe 9, so the engine body holds the air suction pipe and air cleaner case. The structure is simplified, and the filtration effect is similar to that of a large-capacity air cleaner.
In addition, together with the effect of the sound absorbing material 21, intake noise can be greatly reduced.

Further, the same effect can be obtained even if an air suction pipe and an air cleaner case are provided at the same time in either the chemical tank or the fuel tank.

FIG. 6 is another embodiment of the present invention, and FIG. 7 is a horizontal cross section of FIG.
The cylindrical case 6 is equipped with a number of air suction ports 30 on the side opposite to the operator, and an element such as polyurethane foam is placed inside the cavity 25. 26 is inserted and fixed with a rubber cap 31, and is connected to the engine carburetor from the discharge port side through a rubber pipe 9.

By providing a large number of air suction ports 30 whose total area is the same as the area of one conventional suction port, the diameter of each air suction port can be made smaller, reducing the dispersion of the sound-absorbing material, and furthermore, it can be isolated from the worker side by the chemical tank. This makes it difficult for intake noise to be transmitted.

It is also possible to provide an air cleaner case in the chemical tank.

Fig. 8 is another embodiment of the present invention, and Fig. 9 is a horizontal cross section of Fig. 8. When blowing the fuel tank 4, the air suction pipe 5, which has been injection-shaped in advance, is inserted. The sound absorbing material 21 is inserted into the cavity 22 and then fixed with a rubber cap 32 having an air suction port 33, and is passed through a rubber pipe 9 from the discharge port side. It is connected to the air cleaner attached to the engine.

The fuel tank 4 has a relatively wide width in the left and right direction,
Since the volume of the cavity 22 can be made sufficiently large, together with the effect of the sound absorbing material 21, intake noise can be significantly reduced.

Moreover, the same effect can be obtained even if the air suction pipe 5 is provided in the drug tank 3.

According to the present invention, when a drug tank or a fuel tank that has a relatively wide space around it is made of plastic, it is possible to easily form a cavity with a relatively large volume inside, so that the cavity By using this in one or both of the air cleaner case and the air suction pipe, intake noise can be greatly reduced, and worker fatigue can also be reduced.
The simple structure makes it easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an example of a conventional drug tank and fuel tank seen from the engine side, Fig. 2 is a perspective view of the backpack frame side, and Fig. 3 is a perspective view of the drug tank and fuel tank according to the present invention seen from the engine side. Figure 4 is a perspective view as seen from the backpack frame side, Figure 5 is a partial horizontal cross-sectional view of Figure 3 and its A-
A, BB sectional view, FIG. 6 is an embodiment of the present invention, FIG. 7 is a partial horizontal sectional view of FIG. 6 and its C-C sectional view, FIG.
The figure shows another embodiment of the present invention, and FIG. 9 is a partial horizontal sectional view of FIG. 8 and its DD sectional view. 3... Chemical tank, 4... Fuel tank, 5... Air suction pipe, 6... Air cleaner case.

Claims (1)

[Scope of utility model registration request] An air cleaner in which a tank is integrally formed with an air conduit having a suction port and a discharge port, a sound absorbing material is loaded into the air conduit, and the discharge port is attached to a carburetor or a carburetor via a rubber-like elastic pipe. A tank of a powered pest control machine characterized by being connected.