JPH0375225B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to the structure of a shutter case incorporated into an agitation case in a power duster.

(b) Prior Art In conventional backpack-type power powder dusters, the fuel tank, chemical tank, stirring device, blower housing, etc. were manufactured separately using different materials. Also,
It is also known that a fuel tank, a chemical tank, a stirring device, and a blower housing are integrally molded into two halves. For example, Japanese Patent Application Laid-Open No. 52-47481.

This type of configuration required time and effort to manufacture and assemble, which led to high costs.In recent years, integrated manufacturing using blow molding has been used to reduce costs and assembly man-hours. It has come to be that

Blow molding is a method in which the resin is expanded by blowing air into it in a mold, the shape is determined along the inner wall of the mold, the resin is hardened, and the product is taken out.

(c) Problems to be solved by the invention However, although the outside dimensions of products manufactured by blow molding are determined by the mold, there is no mold inside the blow molding, and the air Since it is inflated, accurate dimensions and angles cannot be obtained.

In particular, if the accuracy of the shutter case inside the stirring case and the outlet of the side flow intake passage that generates turbulence is not good, not only will it be impossible to accurately adjust the amount of medicine falling, but it may also leak into the stirring chamber or conversely into the medicine tank. Moreover, turbulence does not occur within the stirring case, and the mixture is not stirred but is discharged in the form of lumps, which can lead to clogging.

(d) Means for solving the problem In order to solve the above-mentioned problems, the present invention is constructed as follows.

In a power powder duster that integrally manufactures a main body consisting of a chemical tank 1, a blower housing 3, a stirring case 9, etc. by blow molding, a shutter case 19 having an edge 19a and a spout 19b is injection molded, and the main body is blow molded. At times, the shutter case 19 is incorporated into the stirring case 9 and integrally molded.

(E) Embodiments The objects of the present invention are as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is a front view of the backpack-type power duster, FIG. 2 is a front view of the integrally molded resin part, FIG. 3 is a cross-sectional side view, and FIG. 4 is a plan view.

The backpack-type power duster drops the amount adjusted by the metering lever 6 from the chemical tank 1 into the stirring chamber 9.
This is a mechanism in which the liquid is stirred by the air and then discharged from the discharge pipe 18 by the wind generated by the blower blades 20.

The main body of the power duster, that is, the chemical tank 1, the blower housing 3, the stirring case 9, the sidestream intake passage 10, the stirring chamber 11, and the sidestream discharge passage 12, are integrally blow molded from the same resin, and a A fuel tank 2 and an engine 4 are fixed, and a backpack frame 5 is attached to the rear surface.

The fuel tank 2 is blow molded like the main body, and is attached to the front side of the stirring case 9 between the drug tank 1 and the engine 4 via a fuel tank receiver 27 from the back side to the stirring case edge 9a.

In the blower, the blower blades 20 attached to the drive shaft of the engine 4 are inserted through the opening in the front of the blower housing 3, and the power from the engine 4 rotates the blower blades 20 within the blower housing 3 to generate wind power and discharge it. It is discharged from the pipe 18.

In addition, a part of the wind force generated in the blower housing 3 flows into the side stream intake port 10 and creates turbulent airflow, and the medicine that falls into the stirring chamber 11 at the appropriate time is agitated, resulting in a larger air flow than the side stream discharge passage 12. It is sucked into the mainstream and discharged from the discharge pipe 18.

Reference numeral 16 denotes bolt holes, which are opened at several locations for mounting the engine, and bolt fixing holes 17 are provided at corresponding positions on the back side of the blower housing 3.

The backpack frame 5 is made of the same resin as the main body, and is fixed to the main body via an elastic body 8 that absorbs vibrations from the engine 4.

The amount of medicine supplied from medicine tank 1 is Shutter 1
It is determined by the opening/closing amount of 5 and is operated by a metering lever 6. When the metering lever 6 is operated, the link 13
The arm 14 rotates to open and close the shutter 15.

The method for attaching the shutter 15 is to attach the shutter frame 2 to the shutter case 19 incorporated in the stirring case 9, as shown in the front sectional view of the shutter part in FIG. 5 and the perspective view of the shutter assembly in FIG.
6. The shutter holder 23 is assembled from above, and the shutter clamping fitting 24 is inserted through the fitting part 9b shown in FIG. 4 to prevent it from rotating and coming out. Then, by tightening the fastening screws 25, the shutter frame 26 is brought into close contact with the shutter case 19, and the assembly is completed. 22 is a gasket, which is used to securely close and prevent leakage.

As shown in the perspective view of FIG. 7, the shutter case 19 of the present invention is provided with an edge 19a around the periphery so that the shutter case 19 is sealed and fixed without falling out of the stirring case 9.
In addition, the stirring chamber 11 is
A nozzle 19b for generating turbulent air within the tank protrudes downward and is positioned at the outlet of the side flow intake port 10 when installed. The shutter case 19 is manufactured by injection molding (or injection molding, that is, resin is poured into a mold and hardened) with good dimensional accuracy and surface finish.

That is, the shutter frame 26 is located at an important position that separates the chemical tank 1 from the blower, and serves to prevent the chemical from leaking or wind from entering the chemical tank. Since turbulence must be reliably generated by the nozzle 19b for stirring, the shutter case 19 is required to have high precision.

Therefore, the shutter case 19 is manufactured in advance by injection molding with good dimensional accuracy, and in order to compensate for the drawback of blow molding with poor internal precision, the shutter case 19 is assembled into the stirring case 9 and integrated into the stirring case 9 during blow molding of the main body. It is shaped in a specific way.

(F) Effects of the Invention With the structure as described above, the present invention provides the following effects.

First, since the shutter case with the edge and spout is injection molded, the shutter frame etc. can be reliably assembled and metering can be performed accurately. In addition, the size and angle of the side flow intake passage were eliminated, making it possible to reliably generate turbulent airflow and agitate the drug.

Secondly, the shutter case was integrated into the stirring case when the main body was blow molded, so
There are far fewer dimensional errors than when the shutter case is formed by blow molding, there is no need to modify the shutter case, and since the shutter case is tightly fixed, there is no leakage from both the chemical tank and the stirring case. This made it possible to securely partition the space and install the shutter accurately.

[Brief explanation of drawings]

Figure 1 is a front view of the backpack-type power duster, Figure 2 is a front view of the integrally molded resin part, Figure 3 is a sectional side view, Figure 4 is a plan view, and Figure 5 is a front sectional view of the shutter part. , FIG. 6 is a perspective view of the built-in shutter, and FIG. 7 is a perspective view of the shutter case. 1... Chemical tank, 3... Blower case, 9... Stirring case, 19... Shutter case, 19a...
...edge, 19b...spout.

Claims (1)

[Claims] 1 In a power duster whose main body consisting of a chemical tank 1, blower housing 3, stirring case 9, etc. is integrally manufactured by blow molding, the edge 19a and the spout 19b
A power dusting machine characterized in that a shutter case 19 having a shutter case 19 is injection molded, and the shutter case 19 is incorporated into an agitation case 9 and integrally molded when the main body is blow molded.