JP7029142B2 - Spray nozzle cover - Google Patents

Description

The present invention relates to a spray nozzle cover that is attached to a spray nozzle that atomizes and sprays a liquid to prevent the spray liquid from diffusing.

When spraying a chemical solution such as a pesticide or water in the form of a mist, it has been conventionally practiced to use a cover to prevent the spray solution from diffusing.

Since the conventional product of the cover for preventing diffusion diffuses the spray liquid under the influence of the wind and easily adheres to crops that do not want to be sprayed with the liquid around the spray target, the applicants have a problem. We have developed a spray nozzle cover corresponding to the above and proposed it in Patent Document 1 below.

The spray nozzle cover is a combination of a cover body processed into a trumpet shape and a blade attached to the outer surface of the cover body.

The cover body has an oval cross-sectional shape from the connection part between the cylindrical mounting part where the spray nozzle is fixed inside and the mounting part connected to the lower end of the mounting part at an angle toward the tip having an opening. It has a divergent portion that expands in diameter so that the cross-sectional area of the oval cross section increases while maintaining the above.

A holding portion extending from the upper end of the mounting portion to the tip of the diverging portion is provided on the divergent portion and the outer periphery of the mounting portion.

The holding portion is short and is formed of elongated ridges, and the holding portion is formed in pairs with the mounting portion sandwiched between the holding portions along the long axis of the oval cross-sectional shape of the divergent portion. It is placed in the same position.

The holding portion has a slit in the central portion of the crown surface, and the blade is fitted and held in the slit.

The blade rises from the tip of the cover body upward with an inclination angle larger than that of the divergent portion, and the lower corner forms a triangle, and further extends outward from the upper end of the mounting portion. The protruding upper edge has an arc shape, and has a shape in which the upper end of the outer edge is connected to the outer end of the upper edge.

Japanese Unexamined Patent Publication No. 2019-130519

In the spray nozzle cover proposed in Patent Document 1, the blade is held depending only on the holding force of the holding portion provided on the outer surface of the cover body.

Specifically, the lower edge of the blade inclined at the same angle as the divergent portion and the inner edge rising from the inner end of the lower edge to reach the radial inner end of the upper edge are formed in the slit provided in the holding portion. It is press-fitted to fix the blade to the cover body.

However, in this fixed structure, if the cover body is vibrated or the blade hits something outside, the blade may come off from the holding portion, and the reliability of the blade holding is not sufficient.

When the wind hits one surface of the blade, the blade creates a vortex on the leeward side of the blade, and the vortex flows out of the cover body and sprays the spray liquid that tries to diffuse by the wind on the cover side. It works to pull back to.

When the blade comes off the cover body, the effect of installing the cover diminishes.

In the present invention, in order to avoid the defect, the blade is provided on the outer surface of the cover body covering the spray nozzle, and the holding of the blade is performed by the slit of the rib-shaped holding portion provided on the outer surface of the cover body to the lower edge of the blade. It is an object of the present invention to improve the spray nozzle cover made by fitting the inner edge and to improve the holding stability of the blade.

In order to solve the above problems, in the present invention, a tubular cover body and a blade to be attached to the outer surface of the cover body are provided, and the cover body has a cylindrical attachment portion to which a spray nozzle is fixed inside. , A divergent portion that expands in diameter so that the cross-sectional area of the oval cross section increases while maintaining the oval cross-sectional shape from the lower end toward the tip having an opening by connecting to the lower end of the mounting portion at an angle. Have,
On the outer periphery of the divergent portion and the mounting portion, a holding portion of a ridge extending from the upper end of the mounting portion to the tip of the divergent portion is provided, and the blade is inclined to a slit formed on the crown surface of the holding portion. A lower fixture for fixing the lower end of the blade was additionally attached to the spray nozzle cover into which the lower edge and the inner edge rising in succession to the inner end of the lower edge are fitted.

The lower fixture has a pair of vertically opposed holding pieces and a bending back portion connecting the outer ends of the pair of holding pieces, and the bending back portion is connected to the tip of the spreading portion (that is, the cover main body). A clip that is locked to the peripheral edge of the cover and attached from the outside to the inside of the cover so as to sandwich the outer peripheral portion of the divergent portion with the pair of holding pieces, and the clip on the outer surface of the cover body. It consists of a restraint portion that is integrally erected on the upper holding piece to be attached, and the restraining portion and the upper holding piece are provided with a fitting groove into which the lower portion of the blade and the holding portion are fitted. ..

The upper portion of the blade is provided with a mechanical engaging portion between the upper portion on the inner end side of the blade and the holding portion to prevent disengagement from the holding portion, or the upper portion is held by the holding portion. It is advisable to add a fixture and pinch the inner end side of the upper edge of the blade with the upper fixture to stop the movement.

The mechanically engaged portion has a T groove (T slot) open to the upper end of the holding portion at the upper end portion in the longitudinal direction of the slit provided in the holding portion, and is an inner edge inserted into the slit of the blade. It is conceivable that a shape in which the vicinity of the upper end of the T-groove is fitted to fit the T-groove and the portion is inserted into the T-groove from the upper side downward is a preferable form.

The upper fixture includes a substrate to be attached to the outer surface of the cover body and a restraint portion erected on the substrate, and the substrate and the restraint portion have an inner end side of an upper portion of the blade and an upper end of a holding portion. The fitting groove into which the side is fitted is provided so as to be open on the inner and outer side surfaces and the lower surface of the upper fixture.

The upper fixture may be one in which the upper end side of the holding portion is sandwiched between the opposite groove side surfaces of the fitting groove to maintain the attached state, or one in which the upper fixing portion is fastened by the holding portion.

There are two types of upper fixtures that are fastened by the holding part: one that has a convex portion on the inner surface that is easily caught by the holding part, and one that presses the inner surface against the surface of the holding part to sandwich the holding part, and one that mechanically holds the holding part. Can be considered.

The former upper fixing tool, which is provided with a convex portion or the like on the inner surface which is easily caught by the holding portion, is preferably formed of an elastic resin to increase the holding force of the holding portion.

Further, the latter upper fixing tool that is mechanically fastened by the holding portion has a groove extending in the longitudinal direction of the holding portion and the groove when the upper fixing tool is pushed in the longitudinal direction of the holding portion to be fitted to the holding portion. It is advisable to provide a ridge that enters so as to correspond to the upper fixture and the holding portion, and to lock the groove and the ridge to each other.

A spray nozzle cover provided with a type of upper fixture that is fastened by the holding portion can also stably hold the upper portion of the blade in the same manner as that that directly holds the upper portion of the blade by the holding portion.

In the spray nozzle cover of the present invention, the lower fixing tool described above is added, and the lower end of the blade attached to the holding portion on the outer surface of the cover body is restrained by the lower fixing tool, so that the reliability of blade holding is improved. It increases and effectively prevents the blade from coming off due to vibration or contact with external objects.

It should be noted that the inner end side of the upper portion of the blade is provided with a mechanical engaging portion between the blade and the holding portion to prevent disengagement from the holding portion, or the upper fixing is held by the holding portion. When a tool is added and the upper fixing tool is used to fix the inner end side of the upper edge of the blade, the reliability of blade holding is particularly high, and the effect of blade installation is not lost.

It is a perspective view which shows an example of the spray nozzle cover of this invention. It is a partially broken side view of the spray nozzle cover of FIG. FIG. 1A is a perspective view of the lower fixture included in the spray nozzle cover of FIG. 1 from the front side, and FIG. 1B is a perspective view seen from the back side. FIG. 3 is an enlarged cross-sectional view of a main part showing a state in which the lower fixing tool of FIG. 3 is attached to the lower part of the cover main body. It is an enlarged perspective view of the upper inner end portion of the blade attached to the spray nozzle cover of FIG. It is an enlarged plan view which shows the fitting state of the holding part provided in the cover body of the spray nozzle cover of FIG. 1 and the upper inner end part of a blade. It is a perspective view of the upper fixture to be added as needed. FIG. 7 is a side view of the upper fixture of FIG. 7. It is a perspective view which shows the other example of the upper part fixer which is added as needed. FIG. 3 is a plan view showing a state in which still another example of the upper fixture to be added as needed is fitted to the holding portion having the ridge of FIG. It is a perspective view which shows the example which provided the ridge which constitutes the mechanical engaging part on both side surfaces on the upper end side of the holding part provided in the cover body of the spray nozzle cover of this invention.

Hereinafter, embodiments of the spray nozzle cover of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the example spray nozzle cover 1 includes a cover body 2 formed in a trumpet shape using a transparent resin as a material, and two blades 3 attached to the outside of the cover body 2. And the lower fixture 11 that characterizes the present invention.

The cover main body 2 covers the spray nozzle 20 and has a cylindrical mounting portion 4 and a divergent portion 5 whose diameter is slightly increased toward the lower end.

The mounting portion 4 is a cylinder including a ceiling wall 4a that fixes the spray nozzle 20 connected to the liquid supply pipe inward and covers the outer periphery of the spray nozzle 20, and the divergent portion 5 is located at the lower end of the mounting portion 4. Are connected at an angle.

The tilt angle of the divergent portion 5 is an angle corresponding to the spray pattern (spray liquid spray angle) of the spray nozzle 20, and is smaller than the tilt angle of the peripheral wall 4b of the mounting portion 4.

The divergent portion 5 is a hood whose diameter is expanded so that the cross-sectional area of the oval cross section increases while maintaining the oval cross-sectional shape from the connection portion with the mounting portion 4 toward the tip having an opening. ..

As shown in FIG. 4, the tip end side of the divergent portion 5 is slightly bent downward, and a flange 5a having a small width and protruding outward in the radial direction is formed at the lower end of the bent portion.

On the outer periphery of the mounting portion 4 and the divergent portion 5, a holding portion 6 extending from the upper end of the mounting portion 4 to the tip of the divergent portion 5 is provided. The holding portion 6 is formed of a short and elongated ridge that also serves as a reinforcement for the cover main body 2.

As shown in FIGS. 1 and 2, two sets of holding portions 6 form a pair, and as shown in FIGS. 1 and 2, the holding portions 6 sandwich the mounting portion 4 in between and spread out in a plan view of the cover. It is arranged at a position along the long axis of the oval cross-sectional shape of 5.

The two sets of holding portions 6 provided at positions sandwiching the mounting portion 4 have a slit 7 in the central portion of the crown surface, and the lower edge 3c and the inner edge 3d of the blade 3 are fitted into the slit 7. Is retained.

As shown in FIG. 6, a T-groove 8 that opens to the upper end of the holding portion 6 is formed on the upper end side of the slit 7. The lengthwise dimension of the holding portion 6 of the T-groove 8 is smaller than the height of the mounting portion 4.

9 in FIG. 1 is a reinforcing rib formed on the outer surface of the divergent portion 5 as needed.

In the blade 3, the outer edge 3a (see FIGS. 1 and 2) rises upward from the tip of the cover body 2 (the tip of the divergent portion 5) with an inclination angle larger than that of the divergent portion 5, and the lower corner (the lower corner). The corners at the outer ends in the radial direction form a triangle, and the upper edge 3b (also see FIGS. 1 and 2) extending outward from the upper end of the mounting portion 4 forms an arc shape, and the upper edge 3b thereof. It has a shape in which the upper end of the outer edge 3a is continuous with the outer end.

Further, the blade 3 has a lower edge 3c (see FIGS. 2 and 4) inclined at the same angle as the divergent portion 5, and an inner edge that rises from the inner end of the lower edge 3c and reaches the radial inner end of the upper edge 3b. It has 3d (see FIG. 2). Reference numeral 3e is a rib provided on both sides of the blade 3.

Further, the blade 3 has a ridge 10 corresponding to the widened portion of the T groove 8 on the left and right surfaces of the upper portion on the inner end side. The ridge 10 is provided so as to project from the left and right surfaces of the blade 3 in opposite directions.

The ridge 10 is inserted into the widening portion of the T groove 8 from the upper end side of the holding portion 6 by displacing the blade 3 in the longitudinal direction of the holding portion 6. The ridge 10 abuts on the inner end of the T-groove 8 in the longitudinal direction of the end when the upper edge 3b of the blade 3 is flush with the upper end of the holding portion 6.

Therefore, the blade 3 is positioned at a predetermined mounting location. At this time, the lower edge 3c and the inner edge 3d of the blade 3 are inserted into the slit 7 of the holding portion 6 and sandwiched by the holding portion 6.

However, since the lower end side of the blade 3 is simply inserted into the slit 7, there is a possibility that the blade 3 will come off from the slit 7 when a force for lifting it up is applied.

As shown in FIG. 6, the upper portion of the blade 3 cannot move in the direction perpendicular to the longitudinal direction of the T groove 8 because the ridge 10 is fitted in the widened portion of the T groove 8. However, since it can move in the longitudinal direction of the T-groove 8, when a force that lifts the blade 3 upward is applied, the lower edge 3c and the inner edge 3d of the blade 3 come out of the slit 7, and the ridge 10 is also from the T-groove 8. The blade 3 slips out and comes off from the cover body 2.

In the exemplary spray nozzle cover 1, the lower fixture 11 prevents the spray nozzle cover 1 from coming off. The lower fixture 11 is a molded resin product, and has an integrally molded clip 12 and a restraining portion 13 as shown in FIG.

As the material resin of the lower fixture 11, elastic polyacetal resin (POM), polyamide resin (PA), or the like can stably sandwich the blade 3 and is preferable.

The clip 12 has a pair of holding pieces 12a and 12b facing each other vertically and a bending back portion 12c connecting the outer ends of the pair of holding pieces 12a and 12b. The inner surface of the sandwiching pieces 12a and 12b is a processed surface of the convex portion 12d that is easily caught by the flange 5a of the divergent portion.

The restraint portion 13 is erected on the holding piece 12b on the upper side of the clip 12. The restraining portion 13 includes a fitting groove 13a into which the lower portion of the blade 3 and the holding portion 6 are fitted. The exemplary fitting groove 13a is a groove in which the lower portion of the blade 3 and the holding portion 6 are fitted together.

A part of the fitting groove 13a is also formed in the holding piece 12b, and as shown in FIG. 4, the lower portion of the blade 3 and the holding portion 6 are inserted into the fitting groove 13a to insert the lower fixing tool 11. It can be attached to the outer periphery of the tip of the divergent portion 5.

In the spray nozzle cover 1 to which the lower fixing tool 11 is attached, the movement of the blade 3 upward is blocked by the lower fixing tool 11, and further, the movement of the blade 3 outward in the radial direction is prevented by the T-groove 8 and the ridge 10. The engagement portion of the blade 3 and the lower fixture 11 prevent the blade 3 from coming off from the cover body 2.

The upper end side of the upper part of the blade 3 may be fixed by adding an upper fixer 14 (FIG. 1) to be attached to the inner end side of the upper edge 3b of the blade 3.

The upper fixture 14 includes a substrate 14a (see FIGS. 6 and 7) to be attached to the outer surface of the cover main body 2 and a restraint portion 14b erected on the substrate 14a, and the restraint portion 14b has a blade. A fitting groove 14c (also a groove in which the inner end side of the upper portion of the blade 3 and the holding portion 6 are fitted to fit each other) is provided so that the inner end side of the upper portion of 3 and the holding portion 6 are fitted.

The fitting groove 14c is open to the inner and outer side surfaces 14d and 14e and the lower surface 14f of the upper fixture 14. Therefore, the upper fixing tool 14 can be attached to the upper inner corner portion of the blade 3 attached to the holding portion 6 by pushing down from above.

The exemplary upper fixture 14 is made of elastic polyacetal resin or polyamide resin, and holds the upper end side of the holding portion 6 by sandwiching the upper end side of the holding portion 6 with the facing groove side surface of the fitting groove 14c to maintain the attached state ( The position is held by the pinching force). The upper fixing tool 14 is preferably of a type that is fastened by the holding portion 6.

FIG. 9 shows an example of the upper fixture 14 that is fastened by the holding portion 6. The upper fixture 14 of FIG. 9 is made of a polyacetal resin or a polyamide resin and is configured to sandwich the holding portion 6. Further, a plurality of convex portions are formed on the inner surface of the fitting groove 14c that sandwiches the holding portion 6. It is equipped with 15. By catching the convex portion 15 on the holding portion 6, the stability of fixing is enhanced.

The upper fixture 14 may be of a type that is mechanically fastened by the holding portion 6. A specific example of that type of upper fixative 14 is shown in FIG. The upper fixing tool 14 in the figure is provided with a mechanical engaging portion 16 between the holding portion 6 and the holding portion 6 to prevent the upper fixing tool 14 from moving in the direction perpendicular to the length of the holding portion.

The exemplary mechanical engagement portion 16 is provided on both side surfaces of the locking groove 16a that is provided on the groove side surface of the fitting groove 14c of the upper fixture 14 and is inserted in the groove width direction of the fitting groove, and the upper end portion of the holding portion 6. It is composed of a ridge 16b (see FIG. 11 at the same time).

The mechanical engaging portion 16 inserts the ridge 16b into the locking groove 16a by pushing the upper fixing tool 14 from top to bottom. As a result, the movement of the upper fixture 14 in the direction perpendicular to the longitudinal direction of the holding portion is blocked by the mechanical engaging portion 16.

The mechanical engaging portion 16 is provided with locking grooves 16a on both side surfaces of the holding portion 6 and ridges 16b on the opposite groove side surfaces of the fitting groove 14c provided in the upper fixture 14. It doesn't matter if there is one.

The spray nozzle cover that employs the upper fixture 14 that mechanically locks to the holding portion 6 also has the above-mentioned ridge 10 provided on the blade 3 and the T-groove 8 on the upper end side of the slit 7 of the holding portion. Is preferable.

The functions of the example spray nozzle cover 1 and the functions of the blade 3 and the ribs 3e provided on the surface of the blade 3 are described in detail in the above-mentioned Patent Document 1, and will be described here. Omit.

1 Spray nozzle cover 2 Cover body 3 Blade 3a Outer edge 3b Upper edge 3c Lower edge 3d Inner edge 3e Rib 4 Mounting part 4a Ceiling wall 4b Peripheral wall 5 End spread part 5a Flange 6 Holding part 7 Slit 8 T groove 9 Rib 10 Prop 11 Lower fixing Tool 12 Clip 12a, 12b Holding piece 12c Bending back part 12d Convex part 13 Restraint part 13a Fitting groove 14 Upper fixture 14a Substrate 14b Restraint part 14c Fitting groove 14d, 14e Side surface 14f Bottom surface 15 Convex part 16 Mechanical engagement part 16a Locking groove 16b Splash 20 Spray nozzle

Claims (3)

A tubular cover body (2) and a blade (3) to be attached to the outer surface of the cover body (2) are provided, and the cover body (2) is a tubular attachment to which a spray nozzle (20) is fixed inside. The cross-sectional area of the oval cross section increases while maintaining the oval cross-sectional shape from the lower end toward the tip having an opening by connecting to the lower end of the portion (4) and the mounting portion (4) at an angle. It has a divergent portion (5) that expands in diameter so as to
On the outer periphery of the divergent portion (5) and the mounting portion (4), a ridge holding portion (6) extending from the upper end of the mounting portion (4) to the tip of the divergent portion (5) is provided. In the slit (7) formed on the crown surface of the holding portion (6), the inclined lower edge (3c) of the blade (3) and the inner edge (3d) rising in succession to the inner end of the lower edge (3c) are formed. It is a spray nozzle cover that is fitted
The lower fixing tool (11) for fixing the lower end of the blade (3) is provided with a pair of holding pieces (12a, 12b) facing vertically and a pair of holding pieces (11). It has a bending-back portion (12c) connecting the outer ends of 12a and 12b), and the bending-back portion (12c) is locked to the peripheral edge portion of the tip of the divergent portion (5) to cause the divergent portion (5). A clip (12) attached from the outside to the inside of the cover so as to sandwich the outer peripheral portion between the pair of holding pieces (12a, 12b), and on the upper holding piece (12b) of the clip (12). It consists of a restraint portion (13) that is erected integrally, and the lower portion of the blade (3) and the holding portion (6) are fitted into the restraint portion (13) and the upper holding piece (12b). A spray nozzle cover with a groove (13a). An inner edge (3d) having a T-groove (8) open to the upper end of the holding portion (6) at the upper end portion in the longitudinal direction of the slit (7) and being inserted into the slit (7) of the blade (3). ) Has ridges (10) that fit into the T-groove (8) on both sides near the upper end, and the ridges (10) are inserted into the T-groove (8) from top to bottom. The upper part of the blade (3) is the holding portion (6).
The spray nozzle cover according to claim 1, which is mechanically locked to the surface. A substrate (14a) to be attached to the outer surface of the cover main body (2) and a restraint portion (14b) erected on the substrate (14a) are provided, and the substrate (14a) and the restraint portion (14b) are provided. Fitting grooves (14c) into which the inner end side of the upper portion of the blade (3) and the upper end side of the holding portion (6) are fitted are opened on the inner and outer side surfaces (14d, 14e) and the lower surface (14f). It has an upper fixing tool (14), and the upper fixing tool (14) is attached to the inner end side of the upper edge (3b) of the blade (3) to sandwich the holding portion (6) and the blade (3). The spray nozzle cover according to claim 1 or 2.

Images