JPH0790187B2 - Spreader - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spreader.

(Prior Art) Conventionally, as shown in FIG. 8, a straight cylindrical jet head 41 having an open end is connected to the main body of the spreader, and the sprayed object of powder and granules is widely spread from the jet head 41. ing.

That is, the spray nozzle 41 is formed with a plurality of spray ports 42 in the longitudinal direction of the cylinder, and an impact wall 43 is provided at the position of each spray port 42 to collide the object to be sprayed.

Then, as shown in FIG. 9, spraying is performed with the spray port 42 at the bottom and the jet 41 held slightly upward. At this time, the material to be sprayed collides with each impact wall 43 and changes its traveling direction, and is sprayed from each spray port 42.

(Problem to be Solved by the Invention) In the conventional spout 41, the object to be sprayed is collided with the impingement wall 43 to be sprayed. The impact of the collision may cause the coating agent on the fir to fall off or the fir to break.

Further, since the fir sprayed from the hand side of the spout 41 has a shorter fall distance than that of the tip side, it hits the ground surface vigorously and the fall angle θ is small. Therefore, the fir spout 41
Since the light is reflected in the direction of the tip, the density of the fir on the hand side becomes sparse, and there is a drawback that it cannot be evenly distributed.

In view of such conventional problems, the present invention aims to provide a spreader capable of eliminating the collision at the nozzle of the object to be sprayed, damaging the object to be sprayed, and uniformly spraying the object. And

(Means for Solving the Problems) Technical means taken by the present invention to achieve the above object are as follows.

In a spraying machine in which a cylindrical nozzle head 7 is connected to the sprayer main body 1 and a powder-like material to be sprayed is sprayed from the nozzle head 7, the nozzle head 7 is curved in an arc shape, and the curved surface of the nozzle head 7 is curved. The spray port 8 is formed on the side in the longitudinal direction of the cylinder.

(Operation) The jet nozzle 7 is held so that the spray nozzle 8 is located at the upper portion (so that the jet nozzle 7 is convex upward). The object to be sprayed, which has been transported from the tank 4 by the air blown by the fan, is smoothly transported to the tip side inside the nozzle tip 7 because the nozzle tip 7 is formed in an arc shape.

At this time, since the spray port 8 is provided on the convex surface side of the jet nozzle 7, the objects to be sprayed are vigorously sprayed upward from the spray nozzle 8 without receiving a large resistance from the jet nozzle 7 side. The scattered objects fall parabola and fall substantially perpendicularly to the ground surface, and do not reflect on the ground surface.

(Example) Hereinafter, the Example of this invention is described in full detail based on drawing.

FIG. 3 shows a backpack type power spreader, in which 1 is a main body of the spreader, a casing 2 having a fan therein, an engine 3 for driving the fan, a tank 4 for accommodating a material to be sprayed, which serves as both liquid and powder. And a discharge pipe 5 for discharging the material to be scattered (powder or granules) in the tank 4 by blowing air from a fan, and the spray head 7 is detachably attached to the discharge pipe 5 via a flexible pipe 6. It is connected to the.

The injection nozzle 7 is made of a synthetic resin, a metallic material, or the like, has a cylindrical shape with an open tip as shown in FIGS. 1 and 2, and is formed in an arc shape in the cylinder longitudinal direction. An opening 8 having the same width is formed on the curved convex surface side of the jet nozzle 7 in the longitudinal direction of the cylinder from the tip to a midway portion, and the opening 8 serves as a spray port for the material to be scattered.

Reference numeral 10 denotes an adjusting tool, which is externally fitted to the jet nozzle 7. Both ends of the adjusting tool 10 are bent, and an adjusting bolt 11 is screwed into the bent portion 10a. The adjuster 10 adjusts the opening of the spray port 8 so that the amount of sprayed material can be adjusted.

For example, when sprinkling sprouts coated with a germination accelerating agent using the above-mentioned spraying machine, as shown in FIG. 4, the spray nozzle 7 is held so that the spraying port 8 is located above. The fir is conveyed to the tip side of the nozzle 7 along the inner peripheral surface of the nozzle 7 by the air blown from the fan. At this time, since the nozzle head 7 has a cylindrical cross section and is bent in an arc shape, the fir is smoothly transported in the nozzle head 7, and the spray nozzle 8 and the opening of the tip of the nozzle head 7 are not affected by the impact. Is sprayed upward from the front. And the sprinkled fir,
Since the parabola is drawn and falls naturally perpendicular to the ground surface, the position of the fir drops does not change and the drop distribution becomes uniform. Moreover, the coating agent does not fall off and the fir tree does not crack.

Further, since the spray nozzle 8 only needs to be provided with the spray port 8 and it is not necessary to provide an impact wall as in the conventional case, the structure of the spray nozzle 7 is simple and easy to manufacture.

Other embodiments are shown in FIGS. 5 to 7, respectively. In the embodiment shown in FIG. 5, a plurality of spray ports 8 are formed in the cylinder longitudinal direction,
Ribs 12 are provided between the spray ports 8. Therefore, by providing the rib 12, the jet nozzle 7 can be reinforced. The ribs 12 are such that they do not hinder the spraying of the chaff.

FIG. 6 shows that the spray port 8 comprises a wide portion 8a and a narrow portion 8b, and the wide portion 8a and the narrow portion 8b are provided alternately.

FIG. 7 shows that the width of the spray port 8 is gradually narrowed toward the tip side of the jet nozzle 7. On the contrary, this spout 8
The width may be gradually increased.

The present invention is not limited to the above embodiment, and the cross-sectional shape of the injection nozzle 7 may be polygonal or the like,
The length and diameter of the spray nozzle 7 and the shape of the spray port 8 are appropriately determined according to the amount of the sprayed material and the shape of the sprayed material. The jet nozzle may be divided into a plurality of pieces.

(Effect of the Invention) In the present invention, since the jet nozzle 7 is curved in an arc shape and the spray nozzle 8 is formed on the curved convex surface of the nozzle nozzle 7 in the cylinder longitudinal direction, the spray nozzle 8 is located on the upper side. If you use the nozzle 7 like this, the objects to be sprayed will be sprayed forward and upward without impact.
It freely falls almost perpendicularly to the ground surface, and therefore can be sprayed uniformly on the ground surface without damaging the objects to be scattered.

Further, since it is not necessary to provide an impact wall at the position of each spray port 8 of the nozzle head 7 as in the conventional case, the structure of the nozzle head 7 is simple and the manufacturing is easy.

[Brief description of drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a perspective view of a jet nozzle, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is an overall perspective view. FIG. 4 is an explanatory view showing a use state, FIGS. 5 to 7 show another embodiment, and FIG. 5 is a perspective view of a jet nozzle.
6 and 7 are plan views of the main portion of the injection nozzle, FIGS. 8 and 9
FIG. 8 shows a conventional example, FIG. 8 is a cross-sectional view of a jet nozzle, and FIG. 9 is an explanatory view showing a usage state. 1 ... Sprayer main body, 7 ... Spray head, 8 ... Spray port.

Claims (1)

[Claims] 1. A spraying machine in which a cylindrical nozzle head 7 is connected to a sprayer main body 1 and a powdery or granular material to be sprayed is sprayed from the nozzle head 7, wherein the nozzle head 7 is curved in an arc shape, The spreader is characterized in that a spraying port 8 is formed on the curved convex side in the cylinder longitudinal direction.