JP2008100165A - Electrostatic spray apparatus and grip for electrostatic spray pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrostatic spray apparatus which effectively conducts the cut-off of a continuous membrane of spray drops effectively and performs the cleaning of a spray pole easily and surely. <P>SOLUTION: The electrostatic spray apparatus is provided with the spray pole 4 having an electrostatic spraying part 2 at the front part wherein the spray pole 4 is provided with an outer cylindrical part 19 to form an annular gap 20 opened to both of back and forth. The continuous membrane of the spray drops attached to the spray pole 4 is cut off in the annular gap 20 because it is difficult for the spray drops to enter the annular gap 20. Washing water supplied into the annular gap 20 does not remain inside because the annular gap 20 is opened to both of back and forth. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrostatic spraying device that imparts electric charges to spray droplets of agricultural chemicals and the like so that chemicals can sufficiently adhere to crops and the like. The present invention also relates to a grip for electrostatic spray bottles.

  As a kind of the electrostatic spraying device, an electrostatic spraying unit provided at the front part of the spraying tub and holding the rear end side of the spraying tub with a hand or the like to perform electrostatic spraying work is described in Patent Document 1 below. It is described in.

  In this type of spraying apparatus, fine sprayed droplets with electric charges are likely to adhere to the spray soot. And, when spraying for a long time, the adhered spray droplets do not grow to the extent that they flow, but a continuous film of spray droplets is formed on the surface of the spray soot. , Extending from the electrostatic spraying portion side to the operator's hand side. Since the continuous film of pesticide has conductivity, when the continuous film reaches the operator's hand, problems such as short circuit and electric shock occur through the operator holding the grip of the spray tub.

Therefore, in Patent Document 1, it has been proposed to provide an annular recess extending over the entire circumference in the middle of the spray bottle in the length direction. As the annular recess, one whose depth extends in the length direction of the spray tub is described, and further, the annular recess is provided on the front end side of the grip of the spray tub. And by providing the said structure, it is supposed that the continuous film | membrane of a droplet can be interrupted reliably by the said annular recessed part.
Japanese Patent Laying-Open No. 2005-193225 (see FIG. 1)

  In the thing of the said patent document 1, the back bottom part of the said annular recessed part is closed completely. This can be said to be unavoidable from the element name of a recess (annular recess), and is actually a feature common to all of the disclosed embodiments.

  Even in the case of Patent Document 1, if the spraying operation is continuously performed for a long time, it is inevitable that spray droplets enter the annular recess. For this reason, it is necessary to completely remove the pesticide that has entered the annular recess when cleaning the spray basket.

  However, since the bottom of the annular recess is closed, it is difficult for water used for cleaning to escape, and it is difficult to sufficiently clean the bottom of the annular recess.

  The present invention has been made in view of such circumstances, and an electrostatic spray device that can effectively interrupt a continuous film of spray droplets and that can easily and reliably clean a spray tub. Is to provide.

  Another object of the present invention is to provide a grip for an electrostatic spray bottle that can effectively interrupt a continuous film of spray droplets and that can easily and reliably clean the spray bottle.

  In order to solve the above-mentioned problem, an electrostatic spraying device according to the present invention is an electrostatic spraying device including a spray soot having an electrostatic spraying part at a front part, and the spray soot is directed to both front and rear. An outer cylinder portion defining an annular gap that opens is provided (claim 1).

  According to the present invention, since spray droplets do not easily enter the annular gap, the continuous film of spray droplets adhering to the spray tub is interrupted by the annular gap. As a result, the high potential of the electrostatic spraying portion is prevented from being transmitted rearward from the annular gap through the conductive continuous film, and leakage, short circuit, electric shock, and the like are prevented.

  In addition, according to the present invention, since the annular gap opens toward both front and rear, the cleaning water supplied into the annular gap does not remain in the inside. For this reason, even if a spray droplet enters the annular gap, the inside can be easily and reliably cleaned. In addition, when the spray mist is stood up with the electrostatic spray portion facing upward after a cleaning operation or the like, it is also possible to prevent liquid droplets flowing along the spray mist from being accumulated in the annular gap. Furthermore, even if a droplet flows down from the front of the spray mist through the surface of the spray mist due to unforeseen reasons such as the spray mist getting water during the spraying operation, the droplet passes through the annular gap. Therefore, there is no problem such as electric shock as long as the operator holds the outer cylinder portion.

  As a preferred embodiment, the front portion of the outer cylinder portion can include at least two flange portions (claim 2). In this case, since the surface area of the front part of the outer cylinder part is increased by the provision of the at least two flanges, it takes time for the spray droplets to adhere to the front surface of the outer cylinder part. Therefore, it becomes difficult to form a continuous film of spray droplets, which is preferable. In addition, the airflow passing through the at least two ridges in the length direction of the spray tub has an effect of separating the droplets from the ridge. Therefore, even if spray droplets adhere to the at least two ridges, the continuous film of the spray droplets is preferably cut off.

  As a preferred embodiment, the outer cylinder portion may include a rib extending in a length direction of the spray tub in order to increase a support strength of the spray tub (Claim 3). In this way, there is no problem in strength even when an operator holds the outer cylinder portion and supports the spray tub.

  As a preferred embodiment, the spray tub may be provided with a heel portion at a position rearward of the outer cylinder portion (claim 4). In this way, even if the liquid droplet flows down the annular gap, it is preferable that the liquid droplet is prevented from flowing backward from the flange portion.

  The grip for electrostatic spraying fountain according to the present invention is a grip attached to a housing that supports the electrostatic spraying portion at the front end portion, and is an outer portion that defines an annular gap that opens toward both the front and rear of the housing. A cylindrical portion is provided (claim 5).

  According to the grip of the present invention, since spray droplets do not easily enter the annular gap, the continuous film of spray droplets adhering to the housing is interrupted by the annular gap. As a result, the high potential of the electrostatic spraying portion is prevented from being transmitted rearward through the annular gap through the conductive continuous film, and the occurrence of leakage, short circuit, electric shock, etc. is prevented.

  In addition, according to the grip of the present invention, since the annular gap opens toward both the front and rear, the cleaning water supplied into the annular gap does not remain in the inside. For this reason, even if a spray droplet enters the annular gap, the inside can be easily and reliably cleaned. Further, when the casing is stood up with the electrostatic spraying portion facing up after a cleaning operation or the like, it is also possible to prevent liquid droplets flowing along the casing from being collected in the annular gap. Furthermore, even if a droplet flows down from the front of the housing through the surface of the housing due to unforeseen reasons such as the spray bottle being covered with water, the droplet passes through the annular gap. There is no problem such as an electric shock from an operator holding the grip.

  As a preferred embodiment, the front portion of the outer cylinder portion can be provided with at least two collars (Claim 6).

  Moreover, in order to raise the intensity | strength of the said outer cylinder part with respect to the said housing as other one Embodiment, the rib extended in the length direction of the said housing can also be provided (Claim 7).

  As a preferred embodiment, there is provided a fixture for fixing the outer cylinder portion to the casing, and the fixture forms a flange at a position rearward of the outer cylinder portion in a grip-fixed state. (Claim 8).

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 is a partially cutaway side view of an electrostatic spraying device according to an embodiment of the present invention, FIG. 2 is a perspective view of the front grip of FIG. 1, and FIG. 3 is a cross-sectional view of the front grip of FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG.

  The electrostatic spraying device 1 according to the present embodiment is a device for charging a spray droplet S of a conductive liquid and attaching it efficiently to an object, for example, spraying agricultural chemicals, fertilizers, etc. on agricultural products. It is suitable for use.

  As shown in FIG. 1, the electrostatic spraying device 1 includes a hand-held spraying tub 4 having an electrostatic spraying unit 2 at the front and an operation unit 3 at the rear. The operation unit 3 includes a spray cock 5, a power switch 6, and a rear grip 7 having a shape suitable for an operator to hold with one hand. A storage battery 8 as a power source is housed in the rear grip 7 in a replaceable manner.

  The electrostatic spray unit 2 includes a spray nozzle 9 that sprays a liquid in the form of droplets or particles, and an annular electrode 10 disposed concentrically in front of the spray nozzle 9. The liquid in the spray liquid tank 11 is pumped to the spray nozzle 9 by the pump 12. At the same time, electric power necessary for applying static electricity is supplied from the storage battery 8 to the annular electrode 10. The droplet S sprayed from the spray nozzle 9 is discharged into the atmosphere through the space in the annular electrode 10 while diffusing. The spray droplet S is charged by the annular electrode 10 when passing through the annular electrode 10. For this reason, the adhesion of the spray droplets to the object having the opposite polarity is improved.

  In the present embodiment, a booster 13 is disposed in the vicinity of the annular electrode 10 in order to improve safety and suppress voltage loss during power transmission. The booster 13 boosts the voltage of electric power supplied from the storage battery 8 at a low voltage of about 6 V to, for example, about 4.5 kV and supplies the boosted voltage to the annular electrode 10.

  The spray tub 4 includes a long and narrow tub tube 14 made of plastic having good chemical resistance as a casing. The electrostatic spray unit 2 is supported on the front end portion 14 f of the soot tube 14, and the operation unit 3 is supported on the rear end portion 14 r of the soot tube 14. In the soot tube 14, an electrical wiring 15 for supplying electric power to the booster 13 and a liquid supply pipe 16 for supplying the spray liquid to the spray nozzle 9 are accommodated.

  Further, a front grip 17 is attached to the soot tube 14 at an appropriate position between the front end portion 14f and the rear end portion 14r. A suspension ring 18 for connecting a shoulder strap (not shown) is attached to the rear of the front grip 17. The operator can perform the spraying work by suspending and supporting the spray basket 4 with the shoulder strap and holding the front grip 17 and the rear grip 7.

  The spray tub 4 includes an outer cylinder portion 19 that defines an annular gap 20 that opens toward both the front and rear sides. In the present embodiment, the front grip 17 includes the outer cylinder portion 19. However, the present invention is not limited to this, and the outer cylinder portion 19 may be disposed as being unrelated to the front grip 17.

  As shown in FIG. 3, the front grip 17 includes the outer cylinder part 19, an inner cylinder part 21 concentrically disposed in the outer cylinder part 19, the outer cylinder part 19 and the inner cylinder part 21. Rib 22 disposed between the two. The rib 22 also functions as a spacer that forms a space portion between the inner peripheral surface 23 of the outer cylinder portion 19 and the outer peripheral surface 24 of the inner cylinder portion 21. The front grip 17 is made of a material such as plastic having chemical resistance and electrical insulation.

  The inner cylinder portion 21 has the same inner diameter over its entire length, and the inner diameter dimension thereof is a dimension that fits the outer peripheral surface of the soot tube 14. The front end face 21 f of the inner cylinder portion 21 is located behind the front end face 19 f of the outer cylinder portion 19. Similarly, the rear end surface 21r of the inner cylinder portion 21 is also located behind the rear end surface 19r of the outer cylinder portion 19.

  The outer cylinder part 19 has an inner diameter larger than the outer diameter of the inner cylinder part 21. The rib 22 or the spacer connects the inner peripheral surface 23 of the outer cylinder portion 19 and the outer peripheral surface 24 of the inner cylinder portion 21 in the radial direction, and the front end surface of the inner cylinder portion 21. The front grip 17 (the spray tub 4) extends in the length direction from 21f to the rear end surface 19r of the outer tube portion 19.

  A plurality of the ribs 22 are provided around the inner cylinder portion 21 at equiangular intervals. As an example, in the present embodiment, as shown in FIG. 4, four ribs 22 are provided. The rib 22 firmly connects the inner cylinder part 21 and the outer cylinder part 19, and ensures support strength when an operator holds the spray grip 4 while holding the front grip 17. By providing the rib 22, a plurality of hollows extending in the length direction of the spray tub 4 are provided between the inner peripheral surface 23 of the outer cylindrical portion 19 and the outer peripheral surface 24 of the inner cylindrical portion 21. The portion H is partitioned. The plurality of hollow portions H are opened toward the rear of the spray tub 4.

  In the inner cylinder portion 21, a portion 25 extending rearward from the outer cylinder portion 19 serves as a fixing portion for fixing the front grip 17 to the soot tube 14. That is, as shown in FIG. 2, the extending portion 25 is formed with a plurality of slits 26 extending in the length direction of the inner cylinder portion 21. As a fastening fixture, a ring-shaped fastener 28 composed of a combination of two ring halves 27, 27 in pairs is used. The ring-shaped fastener 28 is also made of a material such as plastic having chemical resistance and electrical insulation. The pair of ring halves 27, 27 surround the outer peripheral surface of the extended portion 25, and the pair of ring halves 27, 27 are coupled in a ring shape with a tapping screw 29 or the like. As a result, the extending portion 25 is tightened in the direction of reducing the inner diameter, and the front grip 17 is firmly fixed to the soot tube 14.

  The ring-shaped fastener 28 forms a flange on the inner cylinder portion 21 at a position rearward of the outer cylinder portion 19 in a grip-fixed state. In the present embodiment, the ring-shaped fastener 28 also serves as the flange portion.

  As shown in FIG. 3, the attachment position of the ring-shaped fastener 28 in the length direction of the extending portion 25 is a gap between the rear end surface 19 r of the outer tube portion 19 and the ring-shaped fastener 28. A position having Cr. This is because the plurality of hollow portions H between the outer tube portion 19 and the inner tube portion 21 are opened to the rear of the spray tub 4. A projecting portion 30 for preventing the ring-shaped fastener 28 from falling off is provided at the rear end portion of the extending portion 25.

  Similarly, as shown in FIG. 3, the annular gap 20 is formed in front of the inner cylinder portion 21 by the front inner peripheral surface 23 f of the outer cylinder portion 19 and the outer peripheral surface of the soot tube 14. The annular gap 20 opens toward both the front and rear sides of the front grip 17. In the present embodiment, the annular gap 20 opens to the rear of the front grip 17 through the plurality of hollow portions H defined by the ribs 22.

  The annular gap 20 acts to prevent the formation of a continuous film of spray droplets between the soot tube 14 and the front grip 17. That is, the fine spray droplets S released from the electrostatic spray unit 2 float in the atmosphere and adhere to the outer surface of the soot tube 14. When the spraying operation is continuously performed for a long time, the attached spray droplets do not grow so as to flow, but the spray droplet adhesion area spreads behind the spray tub 4 and eventually the front grip 17. Sprayed droplets also adhere to the outer surface of the (outer cylinder portion 19). If the sprayed droplet film on the outer surface of the soot tube 14 and the sprayed droplet film on the outer surface of the outer cylinder part 19 are connected, a high voltage leak occurs in the hand of the operator holding the front grip 17. There is a risk of electric shock. However, in the present embodiment, the annular gap 20 is provided between the soot tube 14 and the outer cylinder portion 19, and it is difficult for spray droplets to enter the annular gap 20. Since the spray droplet film on the outer surface 14 and the spray droplet film on the outer surface of the front grip 19 are prevented from being connected, the above problem does not occur.

  In the present embodiment, since the annular gap 20 opens toward both the front and rear sides of the front grip 17, even if spray droplets enter the annular gap 20, the front grip 17 is washed with washing water. The inside can be easily and reliably cleaned. Further, it is possible to prevent the liquid droplets flowing along the soot tube 14 from accumulating in the annular gap 20 when the spray soot 4 is stood up with the electrostatic spraying part 2 up after a cleaning operation or the like. Is done. Further, even when the droplets flow down from the front of the spray tub 4 along the surface of the tub tube 14 due to unforeseen reasons such as the spray tub 4 being covered with water during the spraying operation, the droplets are still in the annular shape. Since it passes through the gap 20 and the plurality of hollow portions H, there is no problem such as electric shock as long as the operator holds the front grip 17.

  In the present embodiment, the ring-shaped fastener 28 is disposed as a collar at a position behind the outer cylinder portion 19 of the front grip 17. For this reason, even if the liquid droplet flowing down the surface of the soot tube 14 passes through the annular gap 20 and the plurality of hollow portions H, it is prevented from flowing backward from the ring-shaped fastener 28. is there.

  In the present embodiment, the annular gap 20 is defined by the front inner peripheral surface 23f of the outer cylinder portion 19 and the outer peripheral surface of the soot tube 14, but the present invention is not limited to this. The front end portion 21f of the inner tube portion 21 is extended to the position of the front end surface 19f of the outer tube portion 19, and the outer peripheral surface of the front inner peripheral surface 19f of the outer tube portion 19 and the front extension portion of the inner tube portion. The annular gap 20 may be defined by At least the front inner peripheral surface 23 f of the outer cylinder portion 19 only needs to be involved in the definition of the annular gap 20.

  As another embodiment, the inner tube portion 21 may be omitted and the rib 22 may be in contact with the outer surface of the soot tube 14.

  The ratio of the formation range of the annular gap 20 and the formation range of the rib 22 in the length direction of the front grip 17 is determined by the effect of blocking the continuous film of spray droplets by the annular gap 20 and the rib 22. This can be determined appropriately in consideration of the strength improvement effect of the front grip 17.

  Although not shown in the present embodiment for the sake of simplification, the surface of the outer cylinder portion 19 is formed with irregularities that match the shape of the fingers, as with other grips, Can be processed.

  The front grip 17 includes at least two (three in the illustrated example) flanges 31 on the outer periphery of the front portion of the outer cylinder portion 19. In this case, since the surface area of the front part of the outer cylinder part 19 is increased by the provision of the at least two flanges 31, it takes time for the spray droplets to adhere to the front surface of the outer cylinder part 19. It takes. Therefore, it becomes difficult to form a continuous film of spray droplets on the front grip 17. In addition, the airflow passing in the length direction of the spray tub 4 so as to get over the at least two ridges 31 has an effect of separating droplets from the ridges 31. Therefore, even if spray droplets adhere to the at least two ridges 31, the continuous film of the spray droplets is preferably cut off.

  The at least two flanges 31 may be formed integrally with the outer cylinder 19 in advance, or may be made of a material such as plastic having chemical resistance and electrical insulation, and the outer cylinder 19 The one formed separately may be fixed to the outer periphery thereof.

  A collar portion 32 is also disposed in front of the front grip 17 with a gap Cf between the outer end portion 19 and the front end surface 19f. The flange 32 is also formed of a material such as plastic having chemical resistance and electrical insulation. The flange portion 32 increases the surface area of the spray rod 4 in front of the front grip 17 and delays the formation of a spray droplet film. Further, the flange 32 makes it difficult for spray droplets to enter the annular gap 20. It is preferable that at least two ridges 32 are formed so as to delay the formation of the film of the droplets and to exert the droplet peeling effect. The flange 32 may be formed integrally with the flange 14 in advance, or may be formed separately from the flange 14 and fixed to the outer periphery thereof. Good.

It is a partially cutaway side view of the electrostatic spraying apparatus which concerns on one Embodiment of this invention. It is a perspective view of the front grip of FIG. It is sectional drawing of the front grip of FIG. FIG. 4 is a cross-sectional view taken along arrow IV-IV in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electrostatic spraying apparatus 2 Electrostatic spraying part 4 Spraying bowl 14 Housing (soot pipe)
14f Front end of housing 17 Grip (front grip)
19 outer cylinder part 20 annular gap 22 rib (spacer)
28 buttock (fixture)
31 At least two buttocks

Claims (8)

  An electrostatic spraying device (1) comprising a spraying tub (4) having an electrostatic spraying part (2) at the front, wherein the spraying tub (4) is an annular gap (opening both forward and backward) An electrostatic spraying device comprising an outer cylinder part (19) defining 20).   The electrostatic spraying device according to claim 1, further comprising at least two flanges (31) at a front portion of the outer tube portion (19).   The said outer cylinder part (19) is provided with the rib (22) extended in the length direction of this spraying tub (4), in order to raise the support strength of the said spraying tub (4). Electrostatic spraying device.   4. The electrostatic spray device according to claim 1, wherein the spray tub (4) includes a ridge portion (28) at a position rearward of the outer cylinder portion (19).   A grip (17) attached to the housing (14) supporting the electrostatic spraying portion (2) at the front end portion (14f), and an annular gap (20) opening toward both the front and rear of the housing (14) ) A grip for electrostatic spray bottles, comprising an outer cylinder part (19) defining).   The grip for electrostatic spray bottles of Claim 5 provided with the at least 2 series of collar part (31) in the front part of the said outer cylinder part (19).   The static according to claim 5 or 6, further comprising a rib (22) extending in a length direction of the casing (14) in order to increase the strength of the outer cylinder part (19) with respect to the casing (14). Grip for electrospray bottles.   A fixing tool (28) for fixing the outer cylinder part (19) to the casing (14) is provided, and the fixing tool is a hook part at a position rearward of the outer cylinder part (19) in the grip fixing state. The grip for electrostatic spray bottles according to claim 5, 6 or 7, forming (28).

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