JPH0451892Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a power spreader, and more particularly, to a duster type power spreader equipped with a damper type metering valve.

[Conventional technology]

Most duster-type power spreaders introduce part of the conveying air generated by the rotation of the impeller of the blower unit driven by the engine output from the bottom into the tank unit containing the powdered chemical, and internally The tank unit is configured to stir the drug to give it fluidity and send it to the transport pipe.A metering valve is attached to the opening provided at the bottom of the tank unit so that it can rotate on a pivot, and the opening of the metering valve is By selecting the degree of communication between the bottom opening of the tank unit and the metering chamber provided in the blower unit, the amount of spraying can be adjusted appropriately. As such a power spreader, the Jikoko 61-
The one shown in Japanese Utility Model Publication No. 27666 (Kokai No. 58-166855) is known. This power spreader has a blower unit with a spiral airflow path around the impeller, and a mounting seat for attaching a tank unit to the top of the blower unit.The tank unit is mounted on this mounting seat to fill the chemical. do. Furthermore, this mounting seat has a shutter mechanism that opens and closes the bottom opening of the tank unit, and by opening this shutter mechanism, the inside of the tank unit and the metering chamber of the blower unit can communicate with each other. . The opening/closing plate constituting this shutter mechanism is attached to a rotating shaft rotatably supported in the opening of the mounting seat of the tank unit.

[Problem that the invention attempts to solve]

For this reason, in the case of the above-mentioned power spreader, when the granular chemical is put into the tank unit and used for spraying work, or when the pivoted opening/closing plate is rotated toward the metering chamber side and opened. Since both edges of the opening/closing plate are designed to rotate while being in close contact with the inner surface of the metering chamber, if the powder drug is caught between the opening/closing plate and the inner surface of the metering chamber, the opening/closing plate will close. Even if you try to close it, it will not be able to rotate, causing an inability to measure, or when you stop the chemical sprayer, the opening/closing plate will be open and the chemical will flow down from the tank unit, making it difficult to use. It was becoming a problem. Therefore, if the dimensional accuracy of the molded product was increased so that there would be no gap between the inner surface of the metering chamber and both sides of the opening/closing plate, the granules would become increasingly trapped, making it impossible to put it to practical use. Put it away. Also, although the above-mentioned problem of creating a slight gap between the metering chamber and the opening/closing plate does not occur, when the opening/closing plate is opened, the medicine from the tank unit falls to the bottom of the metering chamber, causing the medicine to drop to the bottom of the metering chamber. A portion of the drug may remain in the metering chamber, and if left as is, there was a problem that the drug would solidify due to its hygroscopic nature.

[Means to solve the problem]

Therefore, in order to solve the above-mentioned problems, this invention has a blower unit that has a metering chamber, and a shutter mechanism that controls the communication state with the interior space of the metering chamber at the bottom opening of the tank unit. and the shutter mechanism includes a metering valve rotatably supported at one end to open and close an opening at the bottom of the tank,
The metering valve is provided with a space between the metering chambers on both sides thereof, and the metering valve is provided with a flap made of an elastic material that closes the space on both sides, and the flap is adjusted. It is characterized by being configured to face both inner surfaces of the volume chamber.

【Example】

Hereinafter, embodiments of this invention will be described with reference to FIGS. 1 to 9 attached hereto. In these figures, reference numeral 10 is an engine unit mounted on the backpack frame 11, and the output of this engine unit 10 drives the blower unit 2, which is also mounted on the backpack frame 11.
It is designed to drive 0. A chemical tank unit 30 is attached on top of this blower unit 20, and a stirring chamber provided in this chemical tank unit 30 and a metering chamber provided in a casing constituting the blower unit 20 below the tank unit. A shutter unit is provided between the two units, and a medicine supply pipe is connected from the metering chamber to the transport pipe through the shutter unit, and the medicine supply pipe is connected to the transport pipe through the shutter unit. The tip portion is connected to a tip pipe (not shown), and the blower unit and tank unit can be connected and separated by a connection unit. Next, each unit will be explained in detail. First, the blower unit 20 is installed so that the impeller 24 can rotate in a space formed by abutting a pair of shell-shaped casings 21 and 22.
22A, a spiral passage 25 is formed in the space inside the casing at the outer periphery of the impeller 24, and a part of the conveyed air generated by the rotation of the impeller 24 flows through the spiral passage 2.
5, the drug is supplied to the stirring chamber of the drug tank unit 30 via a metering chamber below the drug tank unit 30. A mounting seat 26 for the drug tank unit 30 is formed in the casing 21 constituting the blower unit 20.
A metering chamber 27 is formed in the lower space of the drug tank unit 30 attached to the drug tank unit 30, and communicates with the swirl passage 25 via a communication pipe 28. The communication pipe 28 has an inlet end 28A open into the vortex chamber 25 and extends in a three-dimensional crank shape, and an outlet end 28B open to the upper space in the metering chamber 27 for communication. The middle part of the pipe 28 is screwed with screw 2.
8X is fixed to the bottom of the metering chamber 27. The drug tank unit 30 includes a funnel portion 32 with a narrow opening area at the bottom of the tank body 31.
A supply port 33 for supplying medicine is bored in the bottom of the funnel part 32, and a joint unit 4 fitted on the outer periphery of the funnel part 32 is provided.
0 to the mounting seat 26. This joint unit 40 is connected to the tank body 31.
has a cylindrical portion 41A surrounding the bottom of the flange portion 41B that can rest on the mounting seat 26;
The bolts 42 passed through the notches 26X, 41X formed at multiple locations in common with the mounting seat 26 can be tightened with double nuts 42A. This bolt 42 has a U-shape, and the end of a toggle handle 43 is pivotally attached to its connecting portion 42B. By loosening this toggle handle 43, the bolt 42 can be rotated around the connecting portion 42B. It is designed so that it can escape from the notches 26X and 41X. A mounting member 34 constituting an opening/closing member that is in close contact with the inner peripheral surface of the supply port 33 is attached to the supply port 33, and four bridge-shaped support members 35 extend from the mounting member 34 to straddle the space above the supply port 33. The top end of the support member 35 has a raised ivy shape that is higher than the bottom end thereof, and a support rod 36, which is a long-shafted bolt, is erected at the center of the support member 35. A cylindrical spacer 37 is fitted into the support rod 36, and a bowl-shaped cap 38 is fastened to the top end of the support rod 36 with a nut 36A, and the blower unit 20 is connected to the lower space of the cap 38. A stirring chamber 39 is formed in which a part of the conveying air is taken in through the communication pipe 28 to stir the powdered medicine and increase its fluidity. The cap 38 is a drug supply port 3.
It has a function of providing movement resistance so that the powder medicine moving to the feed port 33 does not fall all at once and block the supply port 33. In addition, when switching to a liquid drug and using it, it is necessary to close the supply port 33, and the shape is a stepped portion 34 of the tapered portion of the inner peripheral edge of the mounting member 34 located around the supply port 33.
Cap 38
A rim material 38 with the function of a packing material is attached to the periphery of the
A is fixed. The supply port 3 at the bottom of the stirring chamber 39
A metering valve 51 constituting the shutter mechanism 50 is disposed in the lower end opening 33A of the shutter mechanism 3. The metering valve 51 can close the lower end opening 33A, and its end is connected to the joint unit 40. The metering valve 51 is supported by an arm 53 with respect to a rotating shaft 52 extending therethrough, and the metering valve 51 has a space 5 between the left and right inner sides of the metering chamber 27.
The dimensions are such that 1X can be formed. This arm 53 has a cylindrical boss portion 53A and a plate-shaped arm body 5.
3B is integrally formed, and this arm body 53B has flaps 54 formed of an elastic material on both sides, and a U-shaped frame 55 is applied to this flap 54 from below, and the arm body 53B It is clamped by the metering valve 51 placed on the upper side of the valve, and is tightened together with a screw 56. The width of the metering valve 51 and frame 55 corresponds to the width dimension of the lower end opening 33A of the supply port 33, and the elastic flaps 54 extending on both sides of the metering valve 51 and frame 55 It elastically contacts the side surfaces of a metering tray 61, which will be described later, housed in the metering chamber, thereby minimizing the amount of medicine falling from both sides to the bottom of the metering tray 61. Also, frame 55
A control rib 55A that controls the flow of conveying air to the stirring chamber 39 along the width direction is formed at the end of the stirring chamber 39, and this control rib 55A also has a stopper function when the metering valve 51 is fully opened. This corresponds to the metering tray 61 accommodated in the metering chamber 27. In addition, when the metering valve 51 is fully open, the communication pipe 28
In order to prevent the flow of conveying air from the outlet end 28B of the arm main body 53B from being obstructed, a ventilation hole 53X is formed near the boss portion 53A of the arm body 53B so that it can face the outlet end 28B of the communication pipe 28. A portion of the conveying air can pass through the communication pipe 28 to the upper side of the metering valve 51. The boss portion 53A of the arm 53 is connected to the rotation shaft 5.
The opening/closing operation rod 58 is attached to the end of the rotating shaft 52. Furthermore, a box-shaped metering tray 61 with an open top surface is housed in the metering chamber 27, and a peripheral edge 61A of this metering tray 61 has a packing 61B and is fixed to the inside of the mounting seat 26. ing. This metering tray 61 is connected to the outlet end 28 of the communication pipe 28 that takes in the conveyed air from the impeller 24 of the blower unit 20.
B is inserted into the ventilation hole 62, and the cap 38
The powder around the pump is loosened by wind pressure and wind speed and stirred in a stirring chamber 39, and the powdered medicine supplied from the supply port 33 is supplied into the metering space 63. Furthermore, this metering tray 61 has air intake holes 6
A drug supply pipe 65 integrally extends from the delivery hole 64, and an extended end 65A of the drug supply pipe 65 communicates with the transport pipe 66. The tank body 31 has an inlet 311 at the top for putting the medicine in, and the inlet 311 is large enough for a person's hand to enter, and is equipped with a twist-type lid cap 312. . The flaps 54, 54 provided on the left and right sides of the metering valve 51 and the left and right inner surfaces of the metering tray 61 may be in contact with each other or may face each other with a slight gap between them. be. Next, the case of using the power spreader of this invention will be explained. First, the entire weight of the drug (powder) loaded into the tank body 31 is once borne by the cap 38, and the drug (powder) is discharged from between the periphery of the cap 38 and the inner periphery of the tank body 31 to the lower space of the cap 38. It falls into the so-called stirring chamber 39 by the stirring wind, is stirred there and becomes a mixture, and the metering valve 5
1 is supplied into the space 63 of the metering tray 61 in the metering chamber 27 according to the opening/closing area of the metering chamber 27 . In this stirring chamber 39, the conveying air generated by the rotation of the impeller 24 of the blower unit 20 is fed to the metering valve 51.
When the drug is opened, it is introduced through the communication pipe 28, and the powdered medicine in the tank body 31 is loosened and sent out without being obstructed by the rotating shaft 52 and the arm 53, and is then sent out from the supply port 33 to the delivery hole 64. The drug is then supplied through a drug supply pipe 65 and into a transport pipe 66 . When the metering valve 51 is fully open, the control rib 55A hits the bottom of the metering tray 61 and the metering valve 51
Since the flow of the conveying air below 1 is restricted, most of the conveying air is guided from the ventilation hole 53X to the stirring chamber 39, and the conveying air is effectively utilized for the stirring action. Moreover, even when the metering valve 51 is in a half-open state,
The control rib 55A restricts the flow of conveying air flowing downward to the metering valve 51, and for this purpose the arm 5
The conveying air can be effectively used for stirring without reducing the air volume from the ventilation holes 53 If there is any medicine that has fallen into the container, it is blown away and supplied to the transport pipe 66. In particular, since the flap 54 constituting the metering valve 51 is disposed so as to protrude in the width direction from the width of the metering valve 51, the arm 53, and the frame 55, the flap 54 touches both inner surfaces of the metering tray 61. Since it comes into elastic contact with the metering valve 51 and the metering tray 61, it contacts and closes the gap between the metering valve 51 and the metering tray 61.
3A and the metering chamber do not communicate due to the gap,
The falling of the powder onto the bottom surface of the metering tray 61 is minimized. In addition, the medicine in the tank body 31 is transferred to the cap 3.
8 and the inner wall of the tank body 31 from the stirring chamber 39.
However, it is loosened by the stirring wind and falls,
Since the powder is stirred to give fluidity and is fed to the supply port 33 in an agitated state, clogging, which is the so-called tapping phenomenon that occurs in powders with small particles, is prevented.

[Effect of the idea]

As is clear from the above description, the power spreader of this invention solves all the problems of the prior art and has the following effects. The metering valve that constitutes the shutter mechanism is provided with flaps made of elastic material extending from both sides thereof.
When the metering valve is opened, this flap is configured to elastically contact both sides of the metering chamber, or to face each other with a small gap, so that when the shutter mechanism is opened or closed, the metering valve Following the opening/closing operation of the metering chamber, the flap keeps the space between the inside of the metering chamber and both sides of the metering valve closed, and since the flap is made of an elastic material, there is no space between the flap and the inside of the metering chamber. Even if the powder medicine becomes clogged, the flap can be elastically deformed, so the metering valve can be closed smoothly and reliably. Further, since the flap is provided, the amount of medicine falling from the inner surface of the metering chamber and the spaces on both sides of the metering valve can be minimized. Since the chemical does not accumulate on the bottom of the metering chamber, the chemical is not temporarily sprayed in a concentrated amount even though the metering valve is closed.

[Brief explanation of drawings]

The attached drawings show an embodiment of this invention, in which Fig. 1 is a front view of the power spreader, Fig. 2 is a side view of the same, Fig. 3 is a sectional view of the part in Fig. 1, and Fig. 4 is a cross-sectional view of the power spreader. 5 is a sectional view taken along the line of FIG. 3, FIG. 6 is a sectional view taken along the line of FIG. 3, and FIG. 7 is an exploded perspective view showing the shutter mechanism and its vicinity. FIGS. 8 and 9 are a front view and a side view showing the connecting portion between the tank unit and the blower unit. 10...Engine unit, 11...Back frame,
20... Blower unit, 21, 22... Casing, 21A, 22A... Flange, 23... Bolt nut, 24... Impeller, 25... Spiral passage, 26... Mounting seat, 27... Metering chamber, 28...
Communication pipe, 30...Drug tank unit, 31...
Tank body, 311... Input port, 312... Cap, 32... Funnel part, 33... Supply port, 33
A...Lower end opening, 34...Mounting member, 35...
Support member, 36...Support rod, 37...Spacer,
38... Cap, 38A... Rim material, 39...
Stirring chamber, 40...Joint unit, 41A...
...Cylinder part, 41B...Flange part, 41X...Notch, 42...Bolt, 42A...Double nut,
42B... Connection portion, 43... Toggle handle, 5
0...Shutter mechanism, 51...Adjustment valve, 51X...
... Space, 52 ... Rotation axis, 53 ... Arm, 53
A...Boss part, 53B...Arm body, 53X...
...Ventilation hole, 54...Flap, 55...Frame, 55...Support plate, 55A...Control rib, 56
...screw, 58...opening/closing operation rod, 61...measuring tray, 61A...periphery, 61B...packet,
62... Air intake hole, 63... Metering space, 64... Delivery hole, 65... Supply pipe, 65A... Extension end, 6
6... Conveyance pipe.

Claims (1)

[Scope of utility model registration request] In a power spreader equipped with a blower unit driven by the output of the engine and a tank unit capable of loading powdered or granular chemicals, the blower unit has a metering chamber, and the tank unit has a metering chamber at the bottom opening. A shutter mechanism is provided to control communication with the internal space of the volume chamber, and the shutter mechanism includes a metering valve whose one end is rotatably supported to open and close an opening at the bottom of the tank, and the metering valve has metering valves on both sides thereof. A space is provided between the metering chamber and the metering valve, and the metering valve is provided with flaps made of an elastic material that close the space on both sides, and the flaps are configured to face inner surfaces of both sides of the metering chamber. A power spreader characterized by: