JP4499302B2 - Spray nozzle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spray nozzle used by being attached to a sprayer for spraying granular materials such as seeds, fertilizers and agricultural chemicals.
[0002]
[Prior art]
In the conventional natural fall type spreader, the spray nozzle is attached to the tip of the flexible pipe connected to the lower part of the storage bag, the operator carries the storage bag of granular materials, holds the flexible pipe, and lowers the spray nozzle. Towards the side, the granular material that falls naturally from the storage bag through the flexible pipe is sprayed while walking.
[0003]
One of the above-mentioned spray nozzles includes a pipe base portion that is inserted into the inner end of a flexible pipe to be fitted and connected, and a hollow head portion that is continuous therewith. The pipe base portion of the spray nozzle is formed into a tubular shape by combining two semi-tubular bodies having a circular arc cross section and welding two butted portions.
[0004]
[Problems to be solved by the invention]
The following problems are pointed out in the spreader provided with the spray nozzle having the above-described configuration.
(1) In the above-mentioned spreader, the connection between the flexible pipe and the spray nozzle is made by fitting the tubular bodies together. As the spraying operation continues, the fit loosens and the spray nozzle is detached from the flexible pipe. May end up. In order to prevent this, the operator tries to prevent the loosening by pushing the flexible pipe strongly into the spray nozzle.
[0005]
By doing this, the tip of the flexible pipe inserted inside the pipe base acts as a force that pushes the pipe base outward, so as long as the pipe base remains in the tubular form, the flexible pipe and the pipe base The frictional force between them can be expanded to prevent loosening.
[0006]
However, since the pipe base is composed of two half tubes as described above, when a force is applied to push the pipe base outward, the stress that causes the half tubes to be separated at the two welded locations. Occur intensively.
[0007]
If the operator repeatedly pushes the flexible pipe into the spray nozzle many times, stress concentration will occur at the two welded points each time, and the welded part will gradually fatigue and eventually break off. There is sex.
[0008]
In this case, since the pipe base does not form a tubular body, no matter how hard the flexible pipe is pushed, a strong frictional force cannot be obtained between the pipe base and the looseness between them cannot be prevented.
[0009]
(2) In the above sprayer, various devices have been devised to increase the diffusibility of particulate matter, but with the aging of farmers, the spraying of agricultural chemicals by such manual labor is labor-saving even a little. Therefore, further improvement should be made to improve the diffusibility.
[0010]
The present invention has been made in view of the above circumstances, and aims to improve the durability and diffusibility of the spray nozzle.
[0011]
[Means for Solving the Problems]
As means for solving the above problems, a spray nozzle having the following configuration is employed. That is, the spray nozzle according to the first aspect of the present invention is connected to the sprayer for spraying the particulate matter, and is formed into a tubular shape by combining the first and second semi-tubular bodies having a circular arc cross section. A spray head composed of a base and a hollow head connected to the base;
The first semi-tubular body is formed with a protrusion at one butting position with the second semi-tubular body, and the second semi-tubular body has the one butt with the first semi-tubular body. A locking portion that locks the protrusion is formed at a location, and the first and second semi-tubular bodies are joined to the one butted portion by locking the projection to the locking portion. ,
The first semi-tubular body is formed with a first projecting portion projecting outward at the other butted portion with the second semi-tubular body, and the second semi-tubular body includes the first semi-tubular body. Similarly, a second projecting portion projecting outward is formed at the other abutting portion with the semi-tubular body, and both the first and second projecting portions are connected and held so as to be close to and away from each other. A connecting means is provided.
[0012]
In the present invention, the connecting end on the spreader side is inserted inside the base, and the first and second projecting portions are connected and held by the connecting means, so that it is sufficient between the connecting end on the spreader side and the base. Bond strength can be obtained. In addition, at one of the butted portions of the semi-tubular body, which is different from the first and second projecting portions, the protrusion is locked to the locking portion, so that a stronger bond than the welding can be obtained, so that the bonding force is increased. However, one butting point does not break off.
[0013]
The spray nozzle according to claim 2 is the spray nozzle according to claim 1, wherein the connecting means is provided on the female screw part provided on one of the first and second projecting parts and on the other. And a male screw body screwed into the female screw portion through the through hole.
[0014]
In the present invention, the connecting means is constituted by the female screw part and the male screw body, so that the first and second projecting parts can be connected and held easily while both are approached and separated. The base can be easily attached to the connection end on the container side.
[0015]
The spray nozzle according to claim 3 is the spray nozzle according to claim 1 or 2, wherein a columnar portion is installed between the upper and lower surfaces that are separated from each other inside the head portion, It is characterized by being formed by tilting the upper end in the ejection direction of the granular material.
[0016]
In the present invention, since the upper end of the columnar part is tilted in the ejection direction, the particulate matter is ejected in a three-dimensional manner with a spread up and down without being bounced back to the side surface of the columnar part.
[0017]
The spray nozzle according to claim 4 is the spray nozzle according to claim 3, wherein the columnar portion has a rhombic cross section, and two diagonals forming a more acute angle are arranged in the ejection direction of the granular material. Features.
[0018]
In the present invention, the columnar part having a rhombus cross section is formed by arranging two diagonals having a more acute angle in the ejection direction of the granular material, so that the upper end of the columnar part is inclined in the ejection direction. At the same time, the granular material is ejected in a three-dimensional manner with spreading in the vertical and horizontal directions.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a spray nozzle according to the present invention will be described with reference to FIGS. 1 is an overall perspective view of the spray nozzle in the present embodiment, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG. .
The spray nozzle of this embodiment is composed of a pipe base portion 1 that is inserted, fitted, and connected with the tip of a flexible pipe inside, and a hollow head portion 2 that is continuous therewith.
[0020]
The pipe base 1 is formed in a tubular shape by combining two semi-tubular bodies 1a and 1b having an arc cross section and welding two butted portions. On the other hand, the nozzle portion 2 is formed by combining two substantially half-shaped halves 2a and 2b and welding the abutted portions.
[0021]
The pipe base portion 1 and the head portion 2 are composed of one part A in which one half tube 1a and one half member 2a are integrally formed, the other half tube 1b and the other half member 2b. It is composed of another part B formed integrally. These two parts A and B are combined, and a body as a nozzle is formed by welding the butted portions (peripheral portions).
[0022]
The semi-tubular body 1b constituting the pipe base 1 is formed with a protrusion 3 protruding outward at one of the butted portions with the semi-tubular body 1a. On the other hand, the semi-tubular body 1a is formed with a locking portion 4 for locking the protrusion 3 at one of the butted portions with the semi-tubular body 1b. A small hole 4 a is formed in the locking portion 4. When the semi-tubular bodies 1a and 1b are combined with each other, the projections 3 are fitted into the holes 4a, so that one of the butted portions is joined prior to welding.
[0023]
Further, the semi-tubular body 1a is formed with an overhanging portion 5 that projects outwardly at the other abutting portion with the semi-tubular body 1b. On the other hand, the semi-tubular body 1b is formed with an overhanging portion 6 that projects in the same manner at the other butting position with the semi-tubular body 1a.
[0024]
These two overhang portions 5 and 6 are formed with small holes 5a and 6a continuously penetrating in the same direction. A nut 7 is embedded in one overhanging portion 6 so as to communicate with the small hole 6a. In the other overhanging portion 5, a wing screw 8 is inserted into the small hole 5a, and the tip thereof is screwed to the nut 7 on the overhanging portion 6 side. It should be noted that a gap is provided between the overhanging portions 5 and 6, and the overhanging portions 5 and 6 are not bonded by the subsequent welding process.
[0025]
The substantially disc-shaped half body 2 a constituting the head portion 2 is formed at a predetermined angle with respect to the central axis of the pipe base portion 1 and forms the upper surface of the head portion 2. The halves 2b are slightly different from the halves 2a, but are inclined in the same direction and form the lower surface of the head portion 2. Furthermore, the semi-tubular body 1b and the half-split body 2b draw a smoothly continuous curve.
[0026]
In the half body 2a, comb teeth 10a are formed on the peripheral surface of the head portion 2 positioned in front of the ejection direction of the granular material with a large space. The halved body 2b is also formed with comb teeth 10b on the peripheral surface of the head portion 2 at the same interval. Ribs 11a and 11b are formed at the tips of the teeth of the comb teeth 10a and 10b so as to trace the peripheral surface. When the halves 2a and 2b are combined with each other, the ribs 11a and 11b are brought into contact with each other in the circumferential direction, and a lattice-like jet is formed by the comb teeth 10a and 10b and the ribs 11a and 11b (apparently one). An outlet 12 is formed.
[0027]
A columnar portion 13 is provided inside the head portion 2 so as to be bridged between the halves 2a and 2b. The columnar part 13 has an upper half formed integrally with the half body 2a and a lower half formed integrally with the half body 2b. When the half bodies 2a and 2b are combined, they are abutted to each other. A columnar shape is formed by being coupled by screws 14 screwed from the outside of the body 2b.
[0028]
The columnar portion 13 has a rhombus cross section, and is formed by arranging two diagonals that form an acute angle in the ejection direction of the granular material. Moreover, the columnar body 13 is formed so that the upper end is inclined in the ejection direction of the granular material with respect to the lower surface of the half body 2b.
[0029]
Next, how to assemble the spray nozzle configured as described above will be described.
First, the two parts A and B are combined in a predetermined manner. At this time, the projection 3 is fitted into the hole 4a, and the semi-tubular bodies 1a and 1b are joined to each other prior to welding. Then, the screw 14 is screwed from the outside of the half body 2b, and the half bodies 2a and 2b are joined.
[0030]
The two parts A and B joined by fitting the protrusion 3 and the hole 4a and screwing the screw 14 are put into a welding mold (not shown), and the joints between the parts A and B are welded at a time. To do. By this welding process, both parts A and B are connected to one butted portion of the pipe base 1 and the butted portions of the halves 2a and 2b continuous thereto, the ribs 11a and 11b, and the other butted portion of the pipe base 1. The butt portions of the halves 2a and 2b that are continuous to each other are welded together without interruption.
Finally, the thumbscrew 8 is inserted into the small holes 5 a and 6 a and the tip is screwed to the nut 7.
[0031]
Next, the procedure for attaching the spray nozzle to the flexible pipe will be described.
First, the tip of the flexible pipe is inserted into the pipe base 1 to a predetermined position. Subsequently, the thumbscrew 8 is gradually tightened. By tightening the thumbscrew 8, the pipe base 1 is deformed so as to reduce its diameter, and is attached to the tip of the flexible pipe. Thereby, sufficient coupling force is obtained between the flexible pipe and the pipe base 1.
[0032]
Next, an effect | action at the time of spraying a granular material using said spray nozzle is demonstrated.
If you hold the flexible pipe with the spray nozzle attached by hand and shake it so as to draw a large circle, the particulates that have fallen through the flexible pipe flow along the smooth curved surface that connects the half-pipe 1b to the half-ply 2b. The direction is changed, and it is ejected from the ejection port 12 so as to jump obliquely upward. At this time, the granular material falling through the center of the pipe base 1 hits two side surfaces forming an acute angle of the columnar portion 13, and the flow is distributed to the left and right.
[0033]
Furthermore, since the upper end of the columnar part 13 is inclined in the ejection direction, the flow of the granular material distributed to the left and right is changed obliquely upward in accordance with the inclination of the columnar part 13, so that the granular material hitting the columnar part 13 Objects are ejected in a three-dimensional manner with not only left and right spread but also up and down.
[0034]
According to the spray nozzle configured as described above, it is sufficient to tighten the thumbscrew 8 between the flexible pipe and the pipe base 1 without strongly pressing the flexible pipe into the spray nozzle as in the prior art. Bonding force is obtained. Moreover, the stress concentration at the welded portion which is anxious is eliminated by joining the semi-tubular bodies 1a and 1b more firmly than the welding by fitting the projections 3 and the holes 4a. Therefore, even if the thumbscrew 8 is tightened strongly, the welded portion does not break off.
[0035]
Moreover, since the semi-tubular bodies 1a and 1b are joined prior to the welding by fitting the projections 3 and the holes 4a, this serves as a temporary fixing during the welding process, and the two parts A and B are also welded. It is made strong.
[0036]
Further, according to the spray nozzle, since the columnar portion 13 having a rhombus cross section is inclined in the ejection direction, the granular material is ejected in a three-dimensional manner with a spread in the vertical and horizontal directions. improves.
[0037]
In the present embodiment, the projection 3 is provided on the semi-tubular body 1b and the locking portion 4 is provided on the semi-tubular body 1a, but this may be reversed. Moreover, you may provide the nut 7 and the thumbscrew 8 in reverse, respectively.
[0038]
【The invention's effect】
As described above, according to the spray nozzle according to claim 1 of the present invention, the connection end on the sprayer side is inserted inside the base portion, and the first and second overhang portions are connected and held by the connection means. By doing so, a sufficient coupling force is obtained between the connecting end on the spreader side and the base. In addition, at one of the butted portions of the semi-tubular body, which is different from the first and second overhanging portions, the protrusion is locked to the locking portion, so that a stronger bond than the welding is ensured. Even if the height increases, one butt portion does not break off. Thereby, sufficient durability can be given to the base part which becomes a connection end with a spreader.
[0039]
According to the spray nozzle of claim 2, the connecting means is constituted by the female threaded portion and the male threaded body, so that the first and second projecting portions are connected and held and the two are easily approached and separated from each other. Therefore, the base can be easily and firmly attached to the connecting end on the spreader side.
[0040]
According to the spray nozzle of claim 3, since the upper end of the columnar part is tilted in the ejection direction, the particulate matter is ejected in a three-dimensional manner with a spread up and down without being bounced back to the side surface of the columnar part. The diffusibility of the granular material can be improved.
[0041]
According to the spray nozzle of claim 4, since the columnar portion having a rhombus cross section is formed by arranging two diagonals having more acute angles in the ejection direction of the granular material, the columnar portion tilts in the ejection direction. In addition to this, the granular material is ejected in a three-dimensional manner with spreading in the vertical and horizontal directions, so that the diffusibility of the granular material can be further improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of a spray nozzle according to the present invention, and is an overall perspective view of the spray nozzle.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
3 is a cross-sectional view taken along the line III-III in FIG.
[Explanation of symbols]
1 Pipe base 1a, 1b Half tube (first and second half tubes)
2 Head part 2a, 2b Half split body 3 Protrusion 4 Locking part 5, 6 Overhang part 7 Nut (Female thread part)
8 Thumbscrew (Male thread)
13 Columnar part

Claims (4)

It consists of a base portion that is tubular by combining the first and second semi-tubular bodies having a circular arc cross section, and a hollow head portion that is connected to the spreader that spreads the particulate matter. A spraying head,
The first semi-tubular body is formed with a protrusion at one butting position with the second semi-tubular body, and the second semi-tubular body has the one butt with the first semi-tubular body. A locking portion that locks the protrusion is formed at a location, and the first and second semi-tubular bodies are joined to the one butted portion by locking the projection to the locking portion. ,
The first semi-tubular body is formed with a first projecting portion projecting outward at the other butted portion with the second semi-tubular body, and the second semi-tubular body includes the first semi-tubular body. Similarly, a second projecting portion projecting outward is formed at the other abutting portion with the semi-tubular body, and both the first and second projecting portions are connected and held so as to be close to and away from each other. A spray nozzle characterized in that a connecting means is provided.   The connecting means includes a female screw portion provided in one of the first and second projecting portions, and a male screw body screwed to the female screw portion through a through hole provided in the other. The spray nozzle according to claim 1, wherein the spray nozzle is configured. Claim in the interior of the head portion and the columnar portion is extended between the upper and lower surfaces spaced apart, the columnar portion, characterized in that it is formed by tilting the upper end ejection direction of said particulate matter The spray nozzle according to claim 1 or 2.   The spray nozzle according to claim 3, wherein the columnar portion has a rhombic cross section, and is formed by arranging two diagonals that form an acute angle in the ejection direction of the granular material.

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