JP2003136002A - Sprinkler and attachment therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sprinkler and attachment thereof which can be used for application of powder and particle, and also application of liquid by a simple switching operation. SOLUTION: The attachment 50 for the sprinkler 100 is placed between a blower 14 and a tank 16 in which a spray agent is stored. The attachment 50 includes a base 56 having an opening 57, which connects the blower 14 and the tank 16, and allows a blowing path 26 of the blower 14 to communicate with the inside of the tank, and a cover 66 which is movable between a first position for hermetically closing an opening 57 of the base, and a second position which is apart from the opening 57. When the cover is moved to the first position, the liquid spray agent can be stored in the tank, and when the cover is moved to the second position, powder and particle can be applied.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spraying device for spraying agricultural chemicals and the like, and more particularly to an attachment in a spraying device which enables mutual use of a powdery or granular spraying agent and a liquid spraying agent. .

[0002]

2. Description of the Related Art A spraying device used for spraying pesticides is, for example, Shoukai 63-3545.
The configuration shown in Japanese Patent Publication No. 4 is widely known. The spraying device described in this publication uses powdery or granular materials (hereinafter collectively referred to as "powdered particles") as a spraying agent, and an engine-driven centrifugal blower and a spraying agent arranged above the centrifugal blower. It is equipped with a tank. The spray agent tank and the centrifugal blower are in communication with each other, and for adjusting the opening amount between them, a desired amount of the spray agent is dropped from the inside of the spray agent tank to the air passage inside the centrifugal blower. An attachment is provided.

In such a structure, when the centrifugal blower is driven, the air flows around the outer peripheral portion of the casing of the centrifugal blower, and the spraying agent supplied from the spraying agent tank accompanies this air flow and is sprayed from the spraying nozzles. It

On the other hand, as a spraying device for spraying a liquid, there is one as described in Japanese Utility Model Publication No. 62-29092. In this spraying device, an attachment is disposed between the spraying agent tank that stores the liquid spraying agent and the centrifugal blower, which closes the two. Further, at the bottom of this attachment or the spray agent tank, there is provided a discharge port for taking out the liquid spray agent in the spray agent tank, and from this discharge port there is a liquid feed pipe for sending the liquid spray agent to the spray nozzle. It is extended.

In the spraying device having such a structure, when the centrifugal blower is driven, air is jetted from the spraying nozzle, and the liquid spraying agent in the spraying agent tank is supplied from the discharge port to the spraying nozzle through the liquid sending pipe. Therefore, the spraying agent becomes a mist and is sprayed from the spraying nozzle.

[0006]

The two conventional spraying devices as described above are dedicated to powder and granules and liquid, respectively, but by changing the attachment, it is possible to switch from powdery or granular material spraying to liquid spraying. Alternatively, it is possible to switch from liquid spraying to powder granule spraying.

However, since the attachment has a completely different structure, it takes a lot of time and labor to replace the attachment.

Further, preparing two kinds of attachments increases the cost of the spraying apparatus as a whole.

Further, it is necessary to store the other attachment while using the one attachment, which is troublesome to manage.

Therefore, an object of the present invention is to provide an attachment and a spraying device which enable mutual use between a powdery material and a liquid by a simple switching operation.

[0011]

In order to achieve the above object, the invention according to claim 1 is provided between a blower (14) and a spray agent tank (16) for storing the spray agent. In the attachment (50) of the spraying device (10)
The blower (14) and the spray agent tank (16) are connected to each other, and the blower path (26) in the blower (14) and the spray agent tank (1) are connected.
6) a base (56) having an opening (57) communicating with the inside of the base, a first position for liquid-tightly closing the opening (57) of the base (56) and a second position separated from the opening (57). And a cover (66) that is movable between them.

In this structure, when the cover (66) is arranged at the first position and the opening (57) of the base (56) is closed in a liquid-tight manner, the liquid spray agent is stored in the spray agent tank (16). Can be stored. Therefore, as in the spraying device (10) according to the invention as claimed in claim 7, a liquid sending means for sending the liquid spraying agent (26, 44) from the spraying agent tank (16) to the blower passages (26, 44) of the blower (14). By providing 42), the spraying device (10) can be used for liquid spraying. Further, when the cover (66) is arranged at the second position and the opening (57) of the base (56) is opened, the powdery or granular spraying agent is stored in the spraying agent tank (16), and this is used as the base (56). ), The air can be sent from the opening (57) to the air passage (26) in the air blower (14) for spraying. Thus, in the attachment (50) according to the present invention, it is possible to easily switch from liquid spraying to powder / granular spraying or vice versa simply by changing the position of the cover (60).

Although the cover (66) moves between the first position and the second position, a guide rod (80) for guiding the cover (66) is a base (56) as a means for ensuring the movement. It is suitable to be attached to).

When the guide rod (80) is provided, the spacer (84) detachably attached to the guide rod (80) is used to separate the cover (66) from the base (56). It is preferable to hold it in two positions.

In this case, the spacer (84) covers the cover (6
6) is pivotally supported and the cover (66) is the first
Advantageously, the spacer (84) is attached to the guide rod (80) both in the position and in the second position. Spacer (8
Since 4) is always attached to the cover (66), it is possible to prevent the spacer (84) from being lost. Further, if the guide rod (80) is provided with a threaded portion, the nut (94) screwed to the threaded portion covers the cover (66).
Can be fixed to the guide rod (80) to securely hold the cover (66) at the first position or the second position,
It is convenient. Further, it is preferable to provide a means (74) for adjusting the opening amount of the opening (57) of the base (56) in order to adjust the blowing amount of the powdery particles into the blower (14).

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of a spraying device according to the present invention. This spraying device 10 is of a so-called backpack type, and includes a backpack frame 12 and a backpack frame 1 which are carried by the worker.
The centrifugal blower 14 of the present invention attached to the No. 2 and the spraying agent tank 16 arranged on the upper side of the centrifugal blower 14.

The backpack frame 12 is formed by an L-shaped frame having a backrest portion 18 that rests on the back of the worker when the worker carries the backrest, and a pedestal portion 20 that extends substantially at a right angle from the lower end of the backrest portion 18. Has been done. Upright worker is backpack frame 1
In a normal use state in which 2 is carried on the back, the back support portion 18 extends in a substantially vertical direction, and the pedestal portion 20 extends in a substantially horizontal direction and away from the operator's back. In this specification, the direction in which the pedestal portion 20 extends is defined as rearward based on this usage state, and terms such as "upper", "lower", "front" are used.

The centrifugal blower 14 includes a pedestal portion 20 of the backpack frame 12.
Installed on top, impeller 22 and impeller 2
2 and a casing 24 for accommodating 2. The impeller 22 is connected to a rotating shaft of an internal combustion engine (not shown) that is a drive source of the centrifugal blower 14. The casing 24 has a spiral airflow passage 26 formed around the impeller 22. In addition, an opening 2 serving as an intake port is provided at the center of the front wall of the casing 24 located on the front side of the impeller 22.
8 is formed. The flow passage area of the air blow passage 26 gradually increases as it goes along the rotation direction. At the outlet end 30 of the air passage 26, a suitable spray tube 3 for spraying the spray agent is provided through a curved tube 32 and a flexible hose (not shown).
4 are connected.

As described above, the spray agent tank 16 is arranged above the centrifugal blower 14. The illustrated spray agent tank 16 is provided with an opening 36 for replenishing the spray agent at the top, and a cap 38 is attached thereto. The spray agent tank 16 in the present embodiment can store both the powder and granular spray agents and the liquid spray agent. Further, the spray agent tank 16 has a liquid outlet 40 for taking out the liquid spray agent when the liquid spray agent is stored.
Is provided at the bottom of the tank. In the present embodiment, as shown in FIG. 2, the liquid spraying agent taken out from the liquid discharge port 40 passes through a flexible liquid sending pipe (liquid sending means) and is attached to the tip of the spreading pipe 34. Inside the spray nozzle 44 from the introduction port 46 formed in 44 (air passage of blower)
Is being sent to. Incidentally, reference numeral 4 in FIG.
Reference numeral 8 is a cap for closing the spout 40.

An attachment 50 is provided between the spray agent tank 16 and the centrifugal blower 14. The attachment 50 is a base 5 attached between an opening 52 provided at the bottom of the spraying agent tank 16 and an opening 54 provided at the top of the casing 24 of the centrifugal blower 14.
6 is provided. As shown in FIGS. 3 to 5, which shows the configuration of the attachment 50 in detail, the outer shape of the base 56 is, for example, a land track shape, a substantially rectangular shape, or a substantially elliptical shape, and an opening 57 is formed in the center thereof. It has a cylindrical structure. The base 56 is configured such that the tank bottom opening 52 having a complementary shape is fitted to the upper portion of the outer peripheral surface of the base 56. A flange portion 58 extends outward from the outer peripheral surface of the base 56, and a flange portion 59 at the lower end of the spray agent tank 16 is brought into liquid-tight contact with the upper surface of the flange portion 58. Further, an annular groove 60 is formed on the entire lower surface of the flange portion 58 of the base 56, and the annular groove 60 is formed.
An annular protrusion 62 that is formed in the upper portion of the casing 24 of the centrifugal blower 14 and that surrounds the upper opening 54 is fitted into the upper portion of the casing 24. Flange portion 59 of the spray agent tank 16,
The flange portion 58 of the base 56 and the annular protruding portion 62 of the centrifugal blower 14 are fastened to each other by bolts or the like, whereby the centrifugal blower 14, the spray agent tank 16, and the attachment 50 are integrated.

The inner peripheral surface of the base 56 is tapered so that the opening area becomes narrower toward the lower side. The tapered inner peripheral surface serves as a funnel for smoothly sliding down the powder particles through the central opening 57 of the base 56 when the powder particles are stored in the spray agent tank 16. It works. Further, on the inner peripheral surface of the base 56, a shelf portion 64 whose upper surface is a horizontal surface is formed over the entire circumference at approximately the middle in the height direction. The shelf 64 is a portion on which a cover 66 described later is placed.

A shutter support shaft 68 is rotatably attached to the base 56 so as to traverse the center of the opening 57 in the lateral direction. One end of the shutter support shaft 68 penetrates the base and projects to the outside, and the lever 70 is connected to the projecting end. The tip of the lever 70 is connected to an operation lever 72 provided on the backpack frame 12 via a link mechanism (not shown), and an operator operates the operation lever 72 to rotate the shutter support shaft 68. Can be made. Further, a shutter plate 74 having substantially the same shape as the opening 57 of the base 56 is fixed to the shutter support shaft 68. When the shutter support shaft 68 is rotated, the shutter plate 74 operates integrally with the shutter support shaft 68 and swings, so that the opening amount of the opening 57 of the base 56 can be adjusted.

A dome-shaped or chevron-shaped cover 66 is arranged above the base 56. The lower edge portion of the cover 66 is formed to have substantially the same shape as the shelf portion 64 formed on the inner peripheral surface of the base 56, and when the cover 66 is lowered onto the base 56, the lower edge portion of the cover 66 is lowered. Lower surface and base 56
The upper surface of the shelf 64 is in contact with. In this state, the lower surface of the lower edge of the cover 66 and the upper surface of the shelf 64 of the base are in liquid-tight contact with each other so that the opening 57 of the base 56 is closed in a liquid-tight manner.
The upper surface of the shelf 64 is provided with an elastic coating such as rubber or resin, or a sealing material (not shown) such as an O-ring.

Further, outwardly projecting brackets 76 are integrally formed on the outer surface of each end of the cover 66 in the longitudinal direction. A through hole is formed in the top-bottom direction in the tip portion of the bracket 76, and a guide rod 80 erected at each end of the base 56 in the longitudinal direction is inserted into the through hole. The guide rod 80 has a base 56 at one end.
The stud bolt is a so-called stud bolt that is implanted in a cylindrical implant portion 82 provided in the.
Therefore, the cover 66 is guided by the guide rod 80 and can move up and down. When the cover 66 is located at the lowest position along the guide rod 80, the lower edge portion of the cover 66 is in a liquid-tight position (first position) with the shelf 64 of the base 56 as described above.

Further, each bracket 76 has a cover 66.
Is moved upward along the guide rod 80 to move the base 56
A spacer 84 is attached for holding at a position (second position) spaced apart by a predetermined distance from.

The spacer 84 in the illustrated embodiment has a flat plate shape, and concave grooves 86 and 88 to be fitted into the guide rod 80 are formed at each of side edges in the longitudinal direction thereof. Further, as shown in FIG. 5, an arm 90 extends from one end of the spacer 84, and a tip of the arm 90 is supported by a support pin 92 provided on the outer surface of the bracket 76, whereby the spacer 84 is supported. The support pin 92 can be pivoted or rotated from a vertically downward position to a vertically upward position. In the state where the spacer 84 is positioned in the substantially vertical downward direction, the end surface of the spacer 84 on the arm 90 side is in contact with the lower surface of the tip end portion of the bracket 76, and the central axis of the one concave groove 86 is the center of the through hole of the bracket 76. It is coaxial with the axis.
Therefore, the concave groove 86 of the spacer 84 can be fitted into the guide rod 80 that is passed through the through hole.
Further, when the spacer 84 is oriented substantially vertically upward, the end surface of the spacer 84 on the arm 90 side is in contact with the upper surface of the tip portion of the bracket 76, and the central axis of the other groove 88 is the central axis of the through hole of the bracket 76. It becomes coaxial. Also in this case, the other concave groove 88 of the spacer 84 can be fitted to the guide rod 80 that is passed through the through hole.

Further, a nut, preferably a wing nut 94, is screwed onto the threaded portion of the guide rod 80, so that the cover 66 can be fixed to the guide rod 80 and thus to the base 56.

On the lower surface of the base 56, the spray agent tank 16
A transport pipe 98 having a funnel portion 96 for guiding the dust-and-particles spraying agent falling through the opening 57 of the base 56 to the outlet end 30 of the air passage 26 of the casing 24 is connected.

A pipe 100 is integrally formed at an appropriate position on the tapered inner peripheral surface of the base 56 and extends upward. The position of the pipe 100 is a position that does not interfere with the cover 66 and is outside the shelf 64. Pipe 1
The central hole of 00 passes through the base 56. This pipe 100 is used in the case of liquid spraying, and FIG.
As shown, one end of the flexible hose 102 is connected, and the other end of the flexible hose 102 is provided on the lower surface of the cap 38 of the spraying agent tank 16 and has a connecting port 10 with a vent hole.
4 is connected.

Next, the operation of the spraying device 10 and the attachment 50 of the present invention having the above-mentioned structure will be described.

First, in the case of using a powdery or granular dusting agent, the attachment 50 is set in the state as shown in FIGS. That is, the cap 38 of the spraying agent tank 16 is removed, a hand is put through the opening 36, the wing nut 94 is loosened, the cover 66 is raised to a position higher than the second position, and the spacer 84 is faced downward. The guide rod 80 is fitted to 86. Then, as the wing nut 94 is tightened on the thread portion of the guide rod 80, the spacer 8
4 is sandwiched between the bracket 76 of the cover 66 and the implanting portion 82 of the base 56, and the cover 66 is fixed at the second position. In this state, the opening 57 of the base 56 is open. Therefore, when the internal combustion engine is driven and the impeller 22 is rotated in a state where the dust-and-particles spraying agent is stored in the spraying agent tank 16, the air taken in from the intake port 28 causes the air taken in from the intake port 28 to form a spiral air flow path in the casing 24. Two
6 from the spray agent tank 16 to the base 5
The spraying agent that drops through the opening 57 of the No. 6 is accompanied and is sprayed through the curved pipe 32, the hose, and the spraying pipe 34.

At this time, the powdery or granular material spraying agent in the spraying agent tank 16 does not flow directly into the opening 57 of the base 56 due to the presence of the cover 66, and the cover 66 and the inner wall surface of the spraying agent tank 16 are not separated from each other. It smoothly flows through the gap between them. Therefore, the opening 57 is prevented from being closed due to the spraying agent being concentrated in the opening 57 of the base 56.

By operating the operating lever 72,
The shutter plate 74 is swung to open the opening 5 of the base 56.
7 can be adjusted, and the amount of spraying agent from the spraying agent tank 16 can be changed to adjust the spraying rate.

On the other hand, in the case of switching from powder and granular material spraying to liquid spraying, after emptying the spraying agent tank 16, the wing nut 94 is loosened, the cover 66 is lifted from the second position, and the spacer 84 is guided by the guide rod 80. (Fig. 4)
reference). Then, the cover 66 is lowered along the guide rod 80, and the bracket 76 is arranged at the first position where it is in contact with the implant portion 82 of the base 56. In this state, the spacer 84 is rotated upward, and the guide rod 80 is fitted into the concave groove 88 on the opposite side. At this time, since the wing nut 94 is located slightly above the upper end of the spacer 84, the fitting operation of the spacer 84 to the guide rod 80 is not hindered. When the spacer 84 is attached to the guide rod 80, when the wing nut 94 is tightened, the bracket 76 of the cover 66 is pressed and fixed to the implant portion 82 of the base 56 via the spacer 84 (FIGS. 2 and 5). reference). The tightening amount of the wing nut 94 becomes substantially the same as the initial loosening amount as a result of the spacer 84 being arranged above the bracket 76, and the tightening operation of the wing nut 94 can be performed in a short time.

After that, as shown in FIG. 2, the cap 48 is removed from the discharge port 40 at the bottom of the spraying agent tank 16,
Connect one end of the liquid delivery pipe 42 to the end, and connect the other end to the spray nozzle 4
4 is connected to the introduction port 46. Then, the spray nozzle 44 is attached to the tip of the spray pipe 34. Furthermore, the cap 38
The flexible hose 102 connected to the connection port 104 is connected to the pipe 100 of the base 56. The flexible hose 102 can always be connected to the connection port 104 of the cap 38 even when the powder or granular material is sprayed. In that case, since it is not necessary to store the flexible hose 102 in another place, problems such as loss do not occur, which is preferable.

After the above switching work is completed, the liquid spraying agent is put into the spraying agent tank 16. At this time, since the cover 66 is arranged and fixed at the first position, the opening 57 of the base 56 is liquid-tightly closed by the cover 66, and the liquid spray agent in the spray agent tank 16 is stored in the base 56.
The opening 57 does not leak into the casing 24 of the centrifugal blower 14.

After that, when the internal combustion engine is driven to rotate the impeller 22, air flows from the spiral air flow passage 26 of the casing 24 through the curved pipe 32 and the ejection pipe 34, and is discharged from the spray nozzle 44. At this time, the spiral air passage 26 of the casing 24 is in a positive pressure state higher than the atmospheric pressure, and the pressure is applied to the inside of the spray agent tank 16 through the pipe 100 and the flexible hose 102 of the base 56. Therefore, the liquid spraying agent in the spraying agent tank 16 is sent into the spraying nozzle 44 from the discharge port 40 through the liquid sending pipe 42 by the pressure in the positive pressure state, and becomes a mist with the air flow. It is sprayed outside.

It will be easily understood from the above that the switching operation from the liquid spraying to the powdery particle spraying is performed.

The preferred embodiments of the present invention have been described above in detail, but it goes without saying that the present invention is not limited to the above embodiments.

For example, in the above embodiment, the guide rod 8
Although the cover 66 is guided between the first position and the second position by 0, the cover may be moved by using another suitable link mechanism or the like.

Further, in the above embodiment, since the spacer 84 cannot be removed from the cover 66, the problem of loss does not occur, but a tubular spacer is used, and when it is not used, it is external to the spraying agent tank 16. It may be stored at. Furthermore, without using a spacer,
A method of screwing the cover 66 to the guide rod 80 may be adopted.

Further, although the above embodiment is a backpack type spraying device, the present invention is also applicable to a handheld type portable spraying device or a large-sized spraying device mounted on a vehicle.

[0044]

As described above, according to the present invention, it is possible to easily switch between liquid spraying and powdery particle spraying without exchanging the attachment. Therefore, it is possible to improve the efficiency of the spraying work without taking time and effort for the switching work.

Further, in the present invention, since there is only one attachment, there is no need to purchase two attachments as in the conventional case, which is advantageous in terms of cost, and there is no need to store unused attachments. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing an embodiment of a spraying device according to the present invention, which is a diagram showing a configuration for spraying powder particles.

FIG. 2 is a sectional view similar to FIG. 1, showing a configuration for spraying liquid.

FIG. 3 is a perspective view showing an attachment in the spraying apparatus of FIG. 1, and is a view showing a configuration at the time of spraying powdery or granular material.

FIG. 4 is a perspective view of an attachment similar to that of FIG. 3, but showing a configuration in the middle of switching from powder and granular material spraying to liquid spraying.

FIG. 5 is a perspective view of the attachment of FIG. 3 viewed from the opposite direction, showing a configuration during liquid spraying.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Spraying device, 14 ... Centrifugal blower, 16 ... Spraying agent tank, 26 ... Blower, 34 ... Spraying pipe, 40 ... Discharge port, 42
... liquid supply pipe (liquid supply means), 44 ... spray nozzle (air passage),
50 ... Attachment, 56 ... Base, 57 ... Opening, 6
4 ... Shelf, 66 ... Cover, 74 ... Shutter plate, 7
6 ... Bracket, 80 ... Guide rod, 84 ... Spacer,
94 ... Wing nut, 100 ... Pipe.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Junichi Miyamoto             1554-3 Onumada, Togane-shi, Chiba Maru Co., Ltd.             Yama Factory Chiba Factory F-term (reference) 4D073 AA04 BB03 BB06 CA06                 4F033 QA05 QB05 QB17 QE15 QE30

Claims (7)

[Claims] 1. A spraying device (1) provided between a blower (14) and a spraying agent tank (16) for storing the spraying agent.
The attachment (50) of 0), which connects the blower (14) and the spray agent tank (16), and connects the blower path (26) in the blower (14) and the spray agent tank (16). A base (56) having an opening (57) communicating with the inside, a first position for liquid-tightly closing the opening (57) of the base (56), and a second position separated from the opening (57). A sprinkler attachment comprising a cover (66) movable between. 2. The guide rod (80) of claim 1, further comprising a guide rod (80) attached to the base (56) to guide the cover (66) between the first position and the second position. Attachment of spraying device. 3. The guide (80) is detachably attached to the guide rod (80) and the cover (66) is attached to the base (56).
The sprinkler attachment of claim 2, further comprising a spacer (84) spaced apart from and retained in the second position. 4. The spacer (84) includes the cover (6).
6) is pivotally supported by the cover (66).
The spraying device according to claim 3, wherein the spacer (84) is adapted to be attached to the guide rod (80) in each of the state in which the is in the first position and the state in which the is in the second position. attachment. 5. The guide rod (80) has a threaded portion, and the cover (66) is fixed to the guide rod (80) by a nut (94) screwed to the threaded portion. The attachment of the spraying device according to any one of claims 1 to 4. 6. The opening (57) in the base (56).
2. A means (74) for adjusting the opening amount of the
Attachment of the spraying apparatus of Claims 5-5. 7. The blower (14), a spraying agent tank (16) for storing a spraying agent, and the blower (14) interposed between the blower (14) and the spraying agent tank (16). ~ 6
When the liquid spray agent is stored in the attachment (50) and the spray agent tank (16) according to any one of (1) to (5), the blower (1) is discharged from the spray agent tank (16).
A spraying device comprising: a liquid sending means (42) for sending the liquid spraying agent to the air passages (26, 44) of 6).