JPS6238761Y2 - - Google Patents

Description

[Detailed description of the invention] This invention mixes powdered medicine into the air being blown through a medicine supply path that connects one end to the opening provided at the bottom of the medicine tank and the other end that joins the ventilation path of the ventilation fan. This invention relates to a metering device of the chemical sprayer that is provided near the opening of the chemical sprayer and is used to adjust the amount of medicine supplied.

Conventionally, the metering device of this type of chemical sprayer has a shutter plate with grid holes that is slidably provided near the opening at the bottom of the chemical tank, and grid holes of the same shape that are overlapped. The opening was configured to be opened and closed between the fixed plate and the fixed plate. When distributing chemicals, especially fertilizers, this sliding type shutter plate can become difficult to slide due to the chemicals adhering to it, and the shutter plate needs to be cleaned frequently, making maintenance difficult. Ta. There was also an elevating system in which the shutter valve was raised and lowered to open and close between it and the valve seat, but as the chemical fell from the entire circumference of the shutter valve, it was difficult to make fine adjustments, and it was difficult to operate when the valve was opened. It had drawbacks such as requiring force.

In the present invention, the external force edge is supported in the vicinity of the opening so as to be able to swing vertically, and the shutter plates, in which the inner edges are provided facing each other so as to be able to come into contact with each other, are mutually attached at a position above the inner edges. Some attempts have been made to provide a metering device for a chemical sprayer that is pivotally mounted to eliminate malfunctions of the shutter plate due to chemical adhesion, and also enables fine adjustment of the amount of chemical supplied.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

1 to 8, 1 is a chemical tank of the chemical sprayer, 3 is a fan case provided integrally with the crankcase 7 of the engine 5, and 9 is a blower fan rotatably provided within the fan case 3. , 11 is a cylinder, 13 is a recoil starter, 15 is a carburetor, 17 is an air cleaner, 19 is a muffler, 21
is the fuel tank. The fan case 3 is divided into two parts and connected by screws 23, 23, . . . . Reference numeral 25 denotes a coupling ring that fits around the outer periphery of the opening 27 at the bottom of the drug tank 1, and is divided into two parts, and is screwed into two parts.
29. 31 is the bonding ring 25
A screw handle passing through the flange 33 of the fan case 3 is screwed into a nut 37 embedded in the flange 35 provided on the upper surface of the fan case 3 during casting, thereby removably connecting the drug tank 1 to the fan case 3. Reference numeral 39 denotes a protrusion projecting from the outer surface of the drug tank 1, which is engaged with the screw handle 31 to prevent it from falling off. By rotating the screw handle 31, the drug tank 1
The fan case 3 can be easily attached and detached, and the shutters 47 and 49, which will be described later, can be easily cleaned. Moreover, no tools are required for attachment and detachment, and the screw handle 31 does not come off due to the protrusion 39. , the screw handle 31 will not be damaged. This attachment/detachment means can be easily attached/detached in the other embodiments shown in FIGS. 10 and 11 as well.

Reference numeral 41 denotes a drug supply path that communicates with the opening 27 at one end and joins the air flow path 43 of the air blower fan 9 at the other end. Reference numeral 45 denotes a metering device provided in the opening 27, and is constructed as follows. That is, 47,49
is a shutter plate whose outer edges are fitted into grooves 53, 53 horizontally provided in the fan case 3 near the opening 27 by means of pins 51, 51, and supported so as to be swingable in the vertical direction. The inner edges are provided opposite each other so as to be able to abut each other, and are pivotally connected to each other by a pivot shaft 55 at a position above the abutting edges. 57 and 59 are shutter plates 4
Pivot 55 with side plates provided on both sides of 7 and 49.
is supported. Reference numeral 61 denotes an operating shaft that is rotatably supported through the drug tank 1. An arm 63 is fixed inside the drug tank 1, and an operating lever 65 is fixed outside. 67 has the upper end as axis 6
9 is a connecting piece pivotally attached to the arm 63, and its lower end is fitted into the pivot shaft 55. 71 is the air passage 43
This is a pressure chamber provided in a high-pressure part of , and communicates with the drug supply path 41 via a vent hole 73 .

In the embodiments described above, the blower fan 9 is rotated by the engine 5 being driven. Shutter plate 4
When 7 and 49 are in the position shown by the solid line in FIG. 4, the opening 27 is closed and the medicine in the medicine tank 1 does not fall. Move the operating lever 65 in the direction of arrow A in FIG.
When operated in this direction, the arm 63 swings downward about the operating shaft 61, and the pivot 55 is pushed down via the connecting piece 67. Accordingly, the shutter plates 47 and 49 swing relative to each other about the pivot shaft 55, taking the posture shown by the imaginary line in FIG. The drug enters the drug supply path 41, passes through the ventilation hole 73, flows through the drug supply path 41 along with the air blown out from the pressure chamber 71, joins the air path 43, mixes in the air, and is dispersed through the air pipe (not shown). It is something that will be done.
By appropriately operating the operating lever 65, the gap between the inner edges of the shutter plates 47, 49 can be adjusted, and therefore the amount of medicine supplied can be adjusted.

9 shows a second embodiment, in which the upper end of an arm 77 pivotally attached to the outer edges of the shutter plates 47, 49 by a shaft 75 is connected to the opening 27 by a shaft 79. A bracket 81 protrudes inwardly.
It is based on

FIG. 10 shows a third embodiment in which a screw handle 31 is provided on the flange 35 of the fan case 3, and a nut 37 is provided on the flange 33 of the drug tank 1. Moreover, FIG. 11 shows a fourth embodiment,
A threaded rod 87 is pivotally attached to a notch 83 provided in the flange 35 through a shaft 85, and a handle 89 is screwed onto the threaded rod 87.

Further, 91 is a notch groove provided in the flange portion 33.

Note that in FIGS. 9 to 11, the same reference numerals as those shown in FIGS. 1 to 8 represent the same components.

Since the present invention has the configuration as described in the claims, it has the following effects.
That is, (1) there are almost no sliding parts, so there is no chance of drug adhesion and hindering the operation. (2) Fine adjustment is possible because the inner edge of the center gradually opens. (3) Since the shutter plate swings downward and opens, the shutter plate is tilted, making it easy for the medicine to fall and prevent it from accumulating. (4) The structure is simple.

In the above embodiment, the shutter plate is supported by the fan case near the opening of the drug tank, but the shutter plate may be supported at the opening of the drug tank.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented in other embodiments as well. Further, the symbols shown in the claims do not limit the technical scope of the present invention.

[Brief explanation of drawings]

Figures 1, 2, and 3 are each a part of the present invention.
A front view, a side sectional view, a front sectional view of the embodiment, FIG. 4 is an enlarged front sectional view of the main part, FIG. 5 is a side sectional view taken along the - line in FIG. 4, and FIG. 6 is a - line in FIG. 7 is a plan sectional view taken along the - line in FIG. 4, FIG. 8 is an enlarged front sectional view of other important parts, and FIG. 9 is a front sectional view of the second embodiment of the important parts. , FIG. 10 is an enlarged front sectional view of the third embodiment of other important parts, and FIG. 11 is an enlarged front sectional view of the fourth embodiment. Explanation of the symbols representing the main parts of the drawing, 1...
Drug tank, 9...Blower fan, 27...Opening, 41...Drug supply path, 43...Blower path, 4
7,49...Shutter board.

Claims (1)

[Scope of utility model registration request] In a chemical sprayer that mixes a chemical into the air by means of a chemical supply path 41 that communicates with an opening 27 provided at the bottom of the chemical tank 1 at one end and joins the air path 43 of the blower fan 9 at the other end, the outer edge Shutter plates 47 and 49 are supported in the vicinity of the opening 27 so as to be vertically swingable, and have inner edges facing each other so as to be able to come into contact with each other. A metering device for a chemical sprayer, characterized by being pivotally mounted.