JP2547593Y2 - Spreader metering switching device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metering switching device of a sprayer which can finely adjust a metering range in addition to a conventional metering operation of a medicine by a control valve.

[0002]

2. Description of the Related Art Conventionally, a discharge port extending from a lower portion of a tank capable of storing a medicine or the like is connected to a discharge air path of a blower and connected to the discharge port via a link mechanism by a metering lever. In a sprayer constructed by interposing a control valve capable of adjusting up and down movement, as shown in Japanese Utility Model Publication No. 58-27787, one opening and closing of one control valve is adjusted to adjust the opening area in the discharge port. It can be metered.

[0003]

However, in such a metering operation using a single control valve that moves up and down in this way, even if the control valve is moved up and down in multiple stages, the lower part of the control valve opens wider than the lower edge. So, the metering range is roughly limited and there is no problem with normal fertilizer application, but we would like to weigh herbicide etc. to about 1/7 the amount of such fertilizer application In such a case, there has been a problem in that fine adjustment is impossible only by the adjustment using the control valve, and it is not possible to perform a spraying operation of a herbicide or the like.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to solve such a problem and to adjust the metering range more finely than in the prior art. In the spraying machine, a more extended discharge port is constructed so as to communicate with the discharge air passage of the blower, and the discharge port is provided with a control valve that can be vertically moved through a link mechanism by a metering lever. A fine control valve close to the control valve is provided so that it can be fixed while being moved upward and downward from inside the discharge port by manual operation, and the fine control valve is formed to have substantially the same width as the control valve. The control valve is formed by forming a notch portion which is narrower than the length in the horizontal direction in the discharge port portion and becomes longer in the vertical direction.

[0005]

Therefore, at the time of normal fertilizer application, if the fine control valve is completely pulled up from the discharge port and locked, the opening area in the discharge port is adjusted while moving the control valve up and down as in the conventional case. It will be possible to roughly adjust the amount of fertilizer, but when spraying herbicides, etc., which are about 1/7 the amount of fertilizer applied, lower the fine control valve fully into the discharge port. When locked, by moving the control valve up and down in the same manner as before, the opening of the notch of the fine control valve is finely adjusted by the control valve, so that the herbicide can be finely adjusted. The spraying operation can be suitably performed while weighing.

[0006]

FIG. 2 is a front view of a backpack type sprayer, in which a tank 1, an engine 10, a blower 3, a fuel tank 11 and the like having a cap 1a at an upper portion and capable of storing medicines are provided. The lower outlet 1b of the tank 1 is provided with an oblique outlet passage 2a provided in the lower outlet 2 thereof.
The downstream end of the outlet channel 2a is connected to the discharge air passage 4 in the curved pipe 4a communicating with the blow-out side of the blower 3 via a connection pipe 12, and The curved tube 4a is the bellows tube 1.
3 and is connected to the spraying tube 14 so as to have the same structure as the conventional structure.

The discharge port 2 has a front half 1 having guide plates 15a and 16a extending obliquely upward.
5 and a rear half body 16, and the lugs 17a and 17b protruding from the front half body 15 are connected to the tank 1 side, and the front half body 15 and the guide plate 15a are joined to the rear half body 16 and the guide plate 16a. The control valve 7 which can be lowered to the lower surface of the outlet passage 2a is slidably fitted in a guide groove 19 formed on the inner surface of the guide plate 15a. And both guide plates 15
A guide tube 21 is fixed above the mounting metal 20 fastened together by bolts 18 to the upper end portions of the guide tubes 21 and 16a.
A vertical groove 23 into which the operating rod 22 to be inserted into the control valve 1 can be fitted is formed at the center of the guide groove 19, and the lower end of the operating rod 22 is formed in a concave notch 7 a formed at the center of the upper end of the control valve 7. Operating plate 24 having an operating groove 25 in which the adjusting lever 5 can be locked in multiple stages on the left side on the back side of the pest controller. The metering lever 5 is connected to the operation rod 22 via a link mechanism 6.
The control valve 7 is linked to the upper end of the control valve 5 so that the control valve 7 can be adjusted up and down in multiple stages by operating the metering lever 5 to perform metering.

A fine control valve 8 which can approach the downstream side of the control valve 7 and descend to the lower surface of the outlet flow passage 2a is slidably fitted in a guide groove 26 formed in the inner surface of the guide plate 16a. The guide plate 16a is provided with a vertically long hole 28 at the center of the guide plate 16a, into which a bolt 27 protruding from the upper part of the fine adjustment valve 8 can be fitted. 7 is screwed with a wing nut 29 so that it can be tightened freely. As shown in FIG. 7, the fine adjustment valve 8 is narrower than the horizontal length in the outlet flow path 2a and longer in the vertical direction. The lower portion 9a has a rectangular shape and the upper portion 9b has a truncated conical notch portion 9. The shape of the notch portion 9 can be arbitrarily modified.

FIGS. 12 to 14 show another example, in which a protruding ridge 3 which can be fitted into the elongated hole 28 is provided on the side of an elongated rubber plate 30 which can abut on the outer surface of the guide plate 16a.
0a is integrally formed, and a round hole 31 is formed at one end side for inserting the bolt 27. When the fine adjustment valve 8 is moved upward as shown in FIG. Is a long hole 2
8 and as shown by phantom lines in FIG.
0a is removed from the elongated hole 28 and the rubber plate 30 is rotated upward by 180 degrees, and as shown in FIG.
Is moved down to fit the ridge 30a into the elongated hole 28, so that the rubber plate 30 can regulate the vertical movement of the fine adjustment valve 8 and prevent the medicine from leaking from the elongated hole 28. Become.

Therefore, at the time of normal fertilizer application, FIG.
As shown in FIG. 5, when the fine adjustment valve 8 is completely pulled up from the outlet channel 2 a and locked by tightening the wing nut 29, the operation rod 22 is operated by operating the metering lever 5.
At the same time, while adjusting the opening area of the outlet flow passage 2a while moving the control valve 7 up and down in multiple steps as shown by the arrow A, rough adjustment can be performed. When spraying a herbicide or the like at the spray amount of FIG.
As shown in FIG. 7, when the fine adjustment valve 8 is manually lowered to the lower surface of the outlet flow path 2a and the wing nut 29 is tightened, the adjustment valve 7 is adjusted in multiple stages while moving up and down as described above. As a result, as shown in FIGS. 10 and 11, a part of the notch 9 of the fine control valve 8 is finely adjusted in the opening by the control valve 7, so that it is preferable to finely adjust the herbicide or the like. The fine adjustment valve 8 is provided on the downstream side of the control valve 7, so that the fine adjustment valve 8 can be easily moved and the manual up-down operation can be easily performed.

[0011]

As described above, according to the present invention, during normal fertilizer application, if the fine control valve (8) is completely pulled up from the discharge port (2) and locked, it can be adjusted as in the conventional case. While the valve (7) is moved up and down by the operation of the metering lever (5), the opening area in the discharge port (2) is adjusted to perform rough metering. 1 /
When spraying a herbicide or the like having a spraying amount of, the fine control valve (8) is fully lowered and locked in the discharge port (2), and the control valve (7) is set in the same manner as before. By moving up and down, a part of the notch (9) of the fine control valve (8) is finely adjusted in its opening by the control valve (7). Can be easily switched by simply moving the fine adjustment valve (8) up and down, which is advantageous in that it can be suitably implemented with a simple structure.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of an embodiment of the present invention.

FIG. 2 is a front view showing the entire sprayer.

FIG. 3 is a front view schematically showing a part of the sprayer.

FIG. 4 is a sectional view showing a section taken along line IV-IV of FIG. 1;

FIG. 5 is a side view showing a part taken along line VV of FIG. 1;

FIG. 6 is an exploded sectional view showing a part of FIG. 4;

FIG. 7 is a front view showing a fine control valve.

FIG. 8 is a front view showing a control valve and an operation rod.

FIG. 9 is a side sectional view showing the operation state of FIG. 1;

FIG. 10 is a front view showing a metering state.

FIG. 11 is a front view showing a metering state.

FIG. 12 is a perspective view showing a rubber plate.

FIG. 13 is a side sectional view showing a state in which a rubber plate is attached to a part of FIG. 1;

14 is a side sectional view showing a state in which a rubber plate is attached to a part of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 Discharge port 3 Blower 4 Discharge air path 5 Metering lever 6 Link mechanism 7 Control valve 8 Fine control valve 9 Notch

Claims (1)

(57) [Scope of request for utility model registration] A discharge port (2) extending from a lower portion of a tank (1) capable of storing a medicine or the like is connected to a discharge air path (4) of a blower (3) and is constructed. )
In the spreader, which is provided with a control valve (7) that can be moved up and down through a link mechanism (6) by a metering lever (5), a fine control valve ( 8) is provided so that it can be fixed while being moved up and down from within the discharge port portion (2) by manual operation, and the fine control valve (8) is formed to have substantially the same width as the control valve (7). The fine control valve (8) is formed with a notch (9) which is narrower than the horizontal length in the discharge port (2) and longer in the vertical direction. Switching device.