JP2012029654A - Chemical sprayer implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent electric trouble by controlling power distribution to a conductive part to prohibit unnecessary power distribution in a sprayer implement of electrostatic nozzle type.SOLUTION: The chemical sprayer implement includes: conductive parts (50) disposed in the vicinity of a spray nozzle (16) of a center boom (12) and in the vicinity of spray nozzles (18) of right and left side booms (13); and a high-voltage power supply device (51) for feeding high voltage to the conductive parts (50). The chemical sprayer implement also includes: travelling velocity detecting means (S) for detecting the travelling velocity of a machine body (1); and power switching means (K) for turning off the high-voltage fed to the conductive parts (50) when the travelling velocity (v) detected by the travelling velocity detecting means is a predetermined prescribed value (v1) on the low velocity side or lower, and turning on the high-voltage fed to the conductive parts (50) when the detected travelling velocity (v) exceeds the prescribed value (v1) on the low velocity side.

Description

  The present invention relates to a chemical solution spraying machine, and more particularly to a control work machine equipped with an electrostatic spraying device.

Conventionally, a field tank is provided with a center boom equipped with a chemical tank at the rear of a traveling machine body and provided with a spraying nozzle for spraying a liquid solution downward in front of the machine body, and a side boom attached to the center boom in an extended state from side to side. The form of spraying chemicals on the crops is well known (Cited document 1), and a strip-shaped conductive part is arranged across a plurality of spray nozzles, and the chemicals from the spray nozzles are charged to efficiently spread the target. The structure made to adhere to the crop etc. of this is known (patent document 2).

  Moreover, the structure provided with the control apparatus which controls automatically a spraying pressure and flow volume in connection with the vehicle speed of the self-propelled spraying machine which sprays a chemical | medical solution while self-propelling is known (patent document 3).

JP 2010-51274 A JP 2008-194673 A JP 2002-23104 A

By the way, in the said patent document 2, two electroconductive parts are distribute | arranged along the longitudinal direction of a support rod, and the spreading | diffusion of the liquid sprayed from the several spray nozzle arranged in parallel by the longitudinal direction of the support rod Although they are spaced apart from each other in a substantially parallel manner, the voltage supply to the conductive portion, that is, the energization is turned on and off by switching a switch provided in the connected power supply device. That is, by switching the manual switch, once the switch is turned on, it is always energized regardless of the state of chemical spraying, that is, whether it is in the spraying state or in the non-spraying state. However, there are many situations where the spraying is interrupted from the start to the end of the spraying work. Even in such a case, leaving the conductive part in the energized state is more likely to cause an electrical failure such as a leakage or a short circuit. There is room.

  In view of the above, the present invention attempts to eliminate the above-described drawbacks by controlling the energization of the conductive portion so that the energization is not performed more than necessary.

In view of the above problems, the present invention has taken the following technical means.
That is, in the first aspect of the present invention, the base of the lift link mechanism (10) is pivotally supported on the machine body (1) on which the chemical tank (30) is mounted, and the boom support frame (14) is mounted on the lift link mechanism (10). The boom support frame (14) is fixedly provided with a center boom (12) having a plurality of spray nozzles (16, 18) for ejecting a chemical solution, and left and right side booms (13L, 13R). The first conductive part (50C) is provided in the vicinity of the spray nozzles (16, 16,...) Of the center boom (12) so as to be able to open and close in a state of extending to the side of the body and a state of being housed on the side of the body. The second and third conductive portions (50SL, 50SR) are disposed in the vicinity of the spray nozzles (18, 18 ...) of the left and right side booms (13L, 13R), respectively, and the first conductive portion to the third conductive portion. High voltage to (50C, 50SL, 50SR) High voltage power supply device for feeding (51C, 51SL, 51SR) in chemical spraying work machine provided with,
A traveling speed detecting means (S) for detecting the traveling speed of the airframe (1) is provided, and when the detected traveling speed (v) by the traveling speed detecting means is equal to or lower than a predetermined low speed side predetermined value (v1), the first conductive When the high voltage supply to the first to third conductive parts (50C, 50SL, 50SR) is cut off and the detected traveling speed (v) exceeds the low speed side predetermined value (v1), the first conductive part to the third conductive part ( 50C, 50SL, 50SR) is provided with a power supply switching means (K) for switching on a high voltage supply to turn on.
According to the first aspect of the present invention, when the detected travel speed (v) is equal to or less than a predetermined value (v1), for example, “0”, the power feeding switching means (K) is configured to transmit the first conductive portion to the third conductive portion (50C). , 50SL, 50SR), and when the detected traveling speed (v) exceeds a predetermined value (v1), the high voltage to the first to third conductive parts (50C, 50SL, 50SR) Switch supply to on. Therefore, when the speed of the airframe is lower than the low speed side predetermined value (v1), for example, when a non-working state such as airframe stop is assumed, the high voltage supply is cut off, and the working traveling state where the speed of the airframe exceeds the low speed side predetermined value (v1) When it is assumed that a high voltage is supplied.
According to a second aspect of the present invention, when the predetermined high speed side predetermined value (v2) is exceeded based on the detection result of the detected traveling speed (v) of the traveling speed detecting means (S), the first conductive portion to the third portion. It is set as the structure of the chemical | medical solution spraying work machine of Claim 1 made into the structure which cuts off the high voltage supply to an electroconductive part (50C, 50SL, 50SR). Therefore, when detecting a speed state exceeding a predetermined value (v2) on the high speed side where the road traveling state is assumed, the high voltage supply is cut off.
According to a third aspect of the present invention, when the traveling transmission (M) is shifted to a predetermined high speed range, the high voltage supply to the first to third conductive portions (50C, 50SL, 50SR) is cut off. It is set as the structure of the chemical | medical solution spraying work machine of Claim 1 made into the structure. Therefore, when detecting the high speed side shift range where the road running state is assumed, the high voltage supply is cut off.

  According to a fourth aspect of the present invention, the spray amount from the spray nozzles (16, 18) is controlled to be changed in magnitude based on the detection result of the detected traveling speed (v) of the traveling speed detecting means. It is set as the structure of the chemical | medical solution spraying work machine of claim | item 2 or claim 3. Therefore, the amount of spray from the spray nozzles (16, 18) is controlled to be large or small based on the detection result of the detected traveling speed (v).

  Since the present invention is configured as described above, the following effects can be obtained.

  In other words, according to the first aspect of the present invention, the power supply switching means (K) cuts off the high voltage supply when the speed of the airframe is lower than the low speed side predetermined value (v1), for example, when a non-working state such as the airframe is stopped. It is safe because it does not cause unexpected electrical leakage accidents during non-working or damage due to short circuit. In addition, when a working state where the speed of the machine body exceeds a predetermined value (v1) on the low speed side is assumed, switching to the high voltage supply is performed, so there is no need to manually operate the power supply to the conductive portion, improving operability. .

  Further, according to the invention of claim 2 and claim 3, in addition to the effect of claim 1, when the speed state is assumed to be traveling on the road, the high voltage supply is cut off, so an unexpected electric leakage accident Do not cause damage or short circuit.

  According to the invention of claim 4, in addition to the effect of claim 1 or claim 2, the amount of spray from the spray nozzle (16, 18) is increased or decreased based on the detection result of the detected traveling speed (v). Change control can be achieved and efficient chemical solution consumption can be realized.

It is a whole side view of a passenger management machine. It is a top view of a passenger management machine. It is a front view of a passenger management machine. It is a system configuration diagram. It is a top view of a dispersion | distribution control apparatus. It is a perspective view of the principal part. It is sectional drawing of a side boom and a slide boom. It is a top view which shows an effect | action. (A) The enlarged front view of the principal part of a side boom and a slide boom, (B) It is a perspective view of the one part. (A) Cross-sectional view of conductive part support configuration, (B) exploded perspective view, (C) partial cross-sectional view, (D) enlarged front view of clip. It is a disassembled perspective view of the electroconductive part support structure which shows another example, (B) The sectional drawing, (C) The expanded sectional view of the electroconductive part. (A) It is a partial side view of a side boom and a slide boom in the housed state, (B) a cross-sectional view thereof, and (C) a rear view of the distal end portion. It is an operation explanation front view of a side boom and a slide boom. It is a control block diagram. It is a block diagram. It is a flowchart figure. It is a flowchart figure. It is a nozzle part expansion front view. It is a side view which shows the improved structure of a nozzle part vicinity. (A) The side view which shows the improved structure of the nozzle part vicinity, (B) The front view. It is a front view which shows a different cultivation form. It is a perspective view which shows the example of mounting | wearing with a different spray nozzle.

Embodiments of the present invention will be described below with reference to the drawings. First, in terms of configuration, reference numeral 1 denotes a body of a passenger management machine that mainly performs cult work and control work in a field or paddy field. This passenger management machine includes a front wheel 2 and a rear wheel 3 having the same diameter, and an engine 4 is mounted on the front portion of the body 1. The engine 4 and the muffler (not shown) are covered with a bonnet 5, and masts 7 and 7 are erected on both the left and right sides of the bonnet 5, and the masts 7 and 7 are lifted by an upper link 8 and a lower link 9. A link mechanism 10 is configured. The upper link 8 and the lower link 9 have substantially the same length in the front-rear direction. Therefore, the lifting link mechanism 10 forms a parallelogram when viewed from the side. The elevating link mechanism 10 is raised and lowered by a pair of left and right elevating cylinders 11, 11 provided outside the bonnet 5. The elevating cylinders 11 and 11 are constituted by electric cylinders, but may be constituted by hydraulic pressure.
Further, a support frame 14 for attaching a center boom 12 and side booms 13 and 13, which will be described later, is connected to the front portion of the elevating link 10. The support frame 14 has a rectangular shape when viewed from the front, and a swing shaft 15 extending in the front-rear direction is provided at the lower center of the support frame 14.
The center boom 12 having a pair of front and rear boom frames 12F and 12R is pivotally supported on the swing shaft 15 so as to be pivotable up and down about the front and rear axis, and a plurality of downwardly directed chemical solutions are applied to the front center boom frame 12F. Nozzles 16, 16... That can be ejected are attached.
The left and right side booms 13L and 13R are pivotally supported by left and right end portions of the rear center boom frame 12R by vertical fulcrum pins 17 and 17, and are also spaced at appropriate intervals on the lower end surfaces of the side booms 13L and 13R. A plurality of spray nozzles 18, 18... Accordingly, the center boom 12 and the side booms 13L, 13R can be integrally adjusted around the swing shaft 15 or controlled to swing up and down with the side booms 13L, 13R being expanded.
A hydraulic cylinder mechanism 20 as an actuator is provided in a vertical posture between the support frame 14 side and the rear center boom frame 12R side. Reference numeral 20 a denotes a piston rod of the hydraulic cylinder mechanism 20.
A control valve (not shown) for horizontal control is provided at an appropriate position of the center boom 12, and the center boom 12 and the side boom 13L, by supplying or discharging pressure oil from the hydraulic pump to the hydraulic cylinder mechanism 20 are provided. 13R is configured to swing up and down. Accordingly, when the piston rod 20a of the hydraulic cylinder mechanism 20 expands and contracts, the boom swings around the swing shaft 14. A plate 21 is provided along the vertical direction at the center in the left-right direction of the support frame 14. A swing angle sensor 22 is attached to the plate 21, and a horizontal sensor 23 provided at an appropriate position of the riding management machine 1. The hydraulic cylinder mechanism 20 is expanded and contracted in cooperation with the center boom 12 and the side booms 13L and 13R are horizontally controlled.
Further, in FIG. 1, vertical movement cylinders 25L and 25R are provided between the top of the support frame 14 and the bases of the side booms 13L and 13R. Opening and closing that opens and closes the side booms 13L and 13R between the support frame 14 and the connecting plate 26 that is integral with the bases of the side booms 13L and 13R and can rotate about the fulcrum pins 17 and 17 with respect to the center boom frame 12R. Cylinders 27L and 27R are provided.

  The side booms 13L and 13R are connected to extension slide booms 28L and 28R, respectively. In other words, the side booms 13L and 13R on the fixed side are provided with a linear fixed frame 13m that holds the nozzle 18 and the chemical solution pipe portion 13p (FIG. 3), and can be slid in the longitudinal direction across the fixed frame 13m. The slide frame 28s is provided with the slide booms 28L and 28R on the slide side. The slide booms 28L and 28R are each provided with a pipe portion 28p, and spray nozzles 29, 29.

  A chemical solution tank 30 is mounted on the rear part of the passenger management machine 1, and the chemical solution is supplied to the spray nozzles of the center boom 12, the side booms 13L and 13R, and the slide booms 28L and 28R. That is, in FIG. 4, the chemical liquid stored in the chemical liquid tank 30 is pumped through the main pipe 32 by driving the control pump 31, and branched pipes 33 </ b> C and 33 </ b> S branched into the center boom 12 and the left and right side booms 13 </ b> L and 13 </ b> R side. , 33S to the spray nozzle 16 of the center boom 12, the side booms 13L, 13R and the spray nozzles 18, 29 of the slide booms 28L, 28R. A flow rate control valve 34 is interposed in the original pipe 32 so that the flow rate can be controlled.

  A traveling operation unit such as a steering handle 36 is provided in front of the driver's seat 35 of the riding management machine 1, and a spraying operation panel 37 is provided on the right side of the driver's seat 35. The operation panel 37 includes an opening / closing cock 38C, 38S, 38S corresponding to each of the branch pipes 33C, 33S, 33S, a control controller 41 having a control pump 31 drive switch 39, a liquid crystal display unit 40, and the lifting link mechanism 10. The boom switch 42 for extending and retracting the lifting cylinder 11 that moves up and down, the pair of left and right switches 43L and 43R for expanding and contracting the left and right opening and closing cylinders 27L and 27R, and the left and right side booms 13L and 13R are individually moved up and down. The vertical movement cylinders 25L, 25R extend and contract, and the slide motors 44L, 44R for sliding the slide booms 28L, 28R are mounted with cross lever-type switches 45L, 45R, etc. It can be operated up to. The spraying operation panel 37 in this embodiment can be operated while visually confirming the spray state from the center boom 12, the front booms 13L and 13R, and the slide booms 28L and 28R from the driver's seat 35. Compared to the configuration in which the boom is attached, it is not necessary to take a posture facing the back of the body, which is convenient.

  Further, as a configuration related to the control controller 41, operation switches are arranged around the liquid crystal display unit 40, and chemical spraying is performed by setting the spraying amount per unit area by the spraying setting switch 46 and the increase / decrease switch 47 and the machine body 1. And an automatic switch 48 that is turned on when an automatic mode is performed in which the flow rate control valve 34 is automatically controlled based on the travel speed to automatically control the amount of chemical solution sprayed from the spray nozzle. When the spraying operation is performed without turning on the automatic switch 48, the manual mode for always spraying the spraying amount based on the setting of the increase / decrease switch 47 is executed.

  In addition to the individual electrostatic switches 58, the main electrostatic switch 53 may be provided to select a normal spraying mode in which electrostatic spraying is not performed or an electrostatic control mode. Reference numeral 59 denotes a display lamp representing an electrostatic spraying state.

  The spray nozzles 16, 16 ... of the center boom 12, the spray nozzles 18, 18 ... of the side booms 13L, 13R, and the spray nozzles 29, 29 ... of the slide booms 28L, 28R are predetermined along the longitudinal direction of each boom. Two linear conductive parts 50 are arranged in parallel with each other so as to intervene in the diffusion range of the chemical solution from the spray nozzles at intervals, thereby constituting an electrostatic spraying device. The conductive portion 50 is a so-called bar electrode formed by coating a copper wire, a steel pipe, etc. with an insulator and a resin outer layer, and is arranged corresponding to the spray nozzles 16, 16... Of the center boom 12. The second and third conductive portions 50SL and 50SR disposed on the side booms 13L and 13R and the fourth and fifth conductive portions 50LL and 50LR respectively disposed on the slide booms 28L and 28R are associated with each other. Provided. An inverter 51 that functions as a high-voltage power supply device is connected to each of the first to fifth conductive parts 50, and a high voltage is supplied to the conductive part 50 so that the chemical liquid sprayed from the spray nozzles 16, 18, and 29 is used. Negative charge is given. When a negative charge is present in the vicinity of the leaves of a plant, the leaves are positively polarized on the front and back surfaces and negatively inside, so that a negatively charged chemical is attracted to the surface of the crop and also on the leaf surface. It adheres evenly to the back side. Note that the inverter 51 represents a correspondence relationship using the same reference numerals as those of the first to fifth conductive portions. In addition, in the case where the negative charge is charged to the chemical liquid particles, if the cultivation mode is such that the positive electrodes 96, 96... Are embedded in advance near the ground surface, the chemical liquid is attracted to the positive electrode, and as a result Dispersion of chemicals is widespread and uneven dispersion can be reduced.

  An electrostatic switch 53 is interposed in the power supply circuit 52 of the electrostatic spraying device so that power supply from the battery 54 can be switched on / off.

  The controller 41 comprises travel speed detecting means S. That is, the riding management machine 1 is provided with a traveling transmission device M, and pick-up means 69 (for example, rear axle) that detects and outputs axle rotation to an axle portion that conducts the left and right rear wheels of the transmission mechanism in the traveling transmission device. A controller 41 that inputs the speed data from the pickup means 69 and calculates the traveling speed v of the airframe 1 is calculated from this speed data.

  The electrostatic spraying device will be specifically described below. With respect to the electrostatic spraying device for the center boom 12, the spray nozzles 16, 16,... Are disposed on the front boom frame 12F on the mounting side of the spray nozzles 16, 16,. The first conductive portions 50C and 50C are detachably supported on the support members 55 and 55 by being suspended and supported therebetween. A first inverter 51C is mounted on the upper surface of the front boom frame 12F via a hook-shaped bracket 56.

  Similarly, the side booms 13L and 13R have second and third inverters 51SL and 51SR, and the second and third conductive portions 50SL and 50SR, and the slide booms 28L and 28R have fourth and fifth inverters 51LL and 51LR. , And the fourth and fifth conductive portions 50LL, 50LR are mounted. As described above, the side booms 13L and 13R on the fixed side are provided with the linear fixed frame 13m that holds the nozzle 18 and the chemical solution pipe portion 13p, and are slidable in the longitudinal direction across the fixed frame 13m. A slide frame 28s is provided, and slide booms 28L and 28R on the slide side are integrally attached to the slide frame 28s. Further, the relationship between the fixed frame 13m and the slide frame 28s is that the slide booms 28L and 28R are each provided with a pipe portion 28p and provided with spray nozzles 29, 29. The side booms 13L and 13R configured as described above and the slide booms 28L and 28R are in a relationship of being arranged in the front-rear direction so that the slide booms 28L and 28R are on the front side. The second and third inverters 51SL and 51SR are detachably attached to the rear surface of the bracket 57 via the bracket 57 on the base end side of the fixed frame 13m, while the fourth and fourth inverters are directly attached to the front surface of the sliding frame 28s. The fifth inverters 51LL and 51LR are attached to the base end side.

  That is, the fixed frames 13m and the sliding frames 28s of the side booms 13L and 13R are arranged in the front and rear, and the second and third inverters 51SL and 51SR are mounted on the surface opposite to the side on which the sliding frames 28s are present. 4. Since the fifth high-voltage power supply devices 51LL and 51SR are mounted on the surface opposite to the side where the fixed frame 13m exists, the inverters 51SL and 51SR are not provided between the fixed frame 13m and the sliding frame 28s. In addition, the conductive part 50 and the inverter 51 can be easily combined to form an electrostatic spray structure for a model that does not affect the assembly of both the frames 13m and 28s and does not include an electrostatic device.

  Like the center boom 12, biped support members 55, 55,... Are arranged on the fixed frame 13m at predetermined intervals, and the second and third conductive portions 50LL, 50LR for the side booms 13L, 13R are arranged. And the fourth and fifth conductive portions 50LL and 50LR for the slide frames 28L and 28R are attached to the support members 55, 55... On the slide frame 28s side.

  Power is supplied from the battery 54 through the power supply circuit 52 and from the power supply line, and the inverters 51 are energized. Each inverter 51 is configured to be converted to a high voltage, and this high voltage is applied to each conductive portion 50. In the above configuration, since the inverter 51 functioning as a high-voltage power supply device is disposed corresponding to each of the center boom 12, the left and right side booms 13L and 13R, and the left and right slide booms 28L and 28R, the lifting / lowering operation, the folding opening / closing operation, and the slide Although each operation is performed independently, it is possible to smoothly cope with these movements. That is, since the combination with the conductive portion 50 is configured in units of inverters 51 and combined with individual booms, it is not necessary to connect and configure the high-voltage conductive portion 50 at a portion that causes articulation. In other words, when the common inverter 51 is installed in the conductive part 50 of the divided boom, the conductive part 50 is disposed in the joint movement portion, so there is a risk of breakage due to repeated bending operations. When the conductive portion and the inverter are individually combined, it is not necessary to connect the articulating portion with the conductive portion, so that there is no breakage, there is no risk of leakage, and the handling is easy.

  In addition, by providing the first to fifth on / off switches 58 for each inverter 51, only the inverter 51 at a location necessary for the spraying operation can be turned on, and the power to the location where the spraying operation is not performed is turned off. It has the effect of saving power and avoiding unnecessary danger. The same reference numerals are used to clarify the correspondence between the conductive portion 50 and the inverter 51. As the configuration of the on / off switch 58, in addition to the electrostatic switch 53, a circuit for supplying power to each inverter 51 is configured in the power circuit 52, and the first to fifth on / off switches 58 are provided respectively. Further, by providing an on / off switch in a box that accommodates each inverter 51, the power can be arbitrarily turned off.

  In the illustrated example, the conductive portions 50 parallel to the left and right are not independently connected, but they may be connected and bent into a U shape to form a parallel state.

  FIG. 9 is an enlarged front view of the side booms 13L and 13R and the slide booms 28L and 28R. As described above, the second and third inverters 51SL and 51SR are detachably attached to the base of the fixed frame 13m. A mast 60 is erected in the vicinity of the second and third inverters 51SL and 51SR. A wire 62 is routed between the wire 61 and the coil hose 63. Both are connected so that the high-pressure chemical solution acts on the T-shaped joint 64 from the branch pipe 33S. One of the T-shaped joints 64 is provided with a connection pipe 65 for connection to the side boom 13L or 13R, and the other is connected to the coil hose 63. The terminal end of the coil hose 63 is connected to the connecting pipe 66 connected to the slide boom 28L or 28R. Accordingly, when the slide boom 28L or 28R slides by driving the slide motor 44L or 44R, the chemical solution can be supplied while being extended or shortened by the coil hose 63 and following the movement. In the present embodiment, the wiring portion 67 extending from the power supply circuit 52 is integrally branched to the coil hose 63, and one of them is connected to the second and third inverters 51SL and 51SR of the side boom 13L or 13R, and the other is connected. The extension wiring portion 68 fixed to the coil hose 63 is connected to the fourth and fifth inverters 51LL or 51LR of the slide boom 28L or 28R. If comprised in this way, the intermediate extension wiring part 68 can be accommodated using the coil restoring force of the coil hose 63, and a cost reduction can be aimed at without requiring a separate extension accommodation structure.

  Next, based on FIG. 10, the support structure and the detachable structure of the conductive portion 50 by the support member 55 and the like will be described in detail. The biped support members 55, 55,... Disposed on the fixed frame 13m of the side booms 13L, 13R at predetermined intervals, slide the long support suspension 70 from the fixed frame 13m to the slide booms 28L, 28R. Similarly, biped support members 55, 55,... Arranged on the moving frame 28s at predetermined intervals are supported from the sliding frame 28s via a support suspension 71 having a short length. The reason why the lengths of the support suspensions 70 and 71 are made different is that the positions of the spray nozzles 16, 16... Mounted on the fixed frame 13 m and the top and bottom of the spray nozzles 18, 18. This is because the relative positions with respect to the nozzles 16 and 18 are made common because the positions are different. Thus, by preparing the support suspensions 70 and 71 having different lengths, the distance between the spray nozzles 16 and 18 is set while setting the distance in the horizontal direction by replacing the two legged support members 55 and 55. The leg-shaped support members 55, 55... Can be made common and contribute to cost reduction. The support suspensions 70 and 71 having different lengths can be engaged with the fixed frame 13m and the sliding frame 28s in a sandwiched state by forming a notch in the upper part of a pair of symmetrical U-shaped members. The support member 55 is fastened and fixed with bolts or the like at the lower part.

  The biped support member 55 made of resin is formed with locking recesses 55b and 55b having openings 55a and 55a, respectively, at the lower end of the bifurcated shape. The engaging recesses 55b and 55b support and support the conductive portion 50. That is, positioning is performed by the rubber packing 72 that can be fitted to the inner peripheral surfaces of the locking recesses 55b, 55b, and the locking member 73L that can be fixed to the outer periphery of the conductive portion 50 by adjusting the inner diameter freely can be formed. The movement of the conductive portion 50 is restricted by contacting the end surface of the support member 55 to be supported. When the clip member 73R having the same shape is brought into contact with the adjacent support member 55 on the opposite end surface, the conductive portion 50 is restricted from moving in the longitudinal direction. The clip members 73L and 73R may be provided on the left and right sides of the same support member 55 (locking recess 55b) for positioning.

The direction of the locking recesses 55b and 55b is opposite to each other, that is, when the conductive portion 50 is attached or detached, the openings 55a and 55a are opened in the direction away from the support member 55, so the long conductive portion 50 is mounted. Even when it is separated for replacement or the like, the interference with other objects can be reduced and work can be performed efficiently. FIG. 11 shows a configuration for improving the case where the conductive portions 50 are added and connected. In some cases, the conductive portions 50 may be joined together to ensure a predetermined length. FIG. 11C shows a cross section, in which a wire 50a such as a copper wire in the core is connected to the left and right wires by crimping sleeves 50b and 50b. For this reason, since a part of the connecting wire is exposed, it is dangerous. In this case, as shown in FIGS. 11A and 11B, a protective pipe 75 is provided between a pair of adjacent left and right support members 55, 55. The length of the conductive part 50 can be arbitrarily changed by sandwiching the structure. 50c is a covering material.
As shown in FIG. 12, boom receiving struts 76L and 76R for holding the stored side booms 13L and 13R are erected on the right and left at the rear of the machine body, and a storage receiving portion 77 is formed on the upper part. . The receiving portion 77 is formed of a U-shaped metal fitting, and holds the boom in a state where the slide booms 28L and 28R are slid and overlapped with the side booms 13L and 13R.
Although the receiving part 77 is provided in the middle part of the side booms 13L and 13R so as to avoid the spray nozzles 18, 18... That is, since the conductive portion 50 is configured by the side booms 13L and 13R and the slide booms 28L and 28R, respectively, the conductive portion 50 cannot be directly supported. Instead, a high-voltage electric wire 79 in a twisted and flexible state is formed, and the high-voltage electric wire 79 is covered with an insulator and a flexible outer sheath so as not to interfere with the receiving portion 77 along the fixed frame 13m. With this configuration, electrostatic spraying can be performed over the entire range without dividing the conductive portion 50, and the conductive portion 50 is not damaged when the side booms 13L and 13R are housed. .
As shown in the cross section of FIG. 12B, a rubber-like elastic body is laid on the lower surface of the fixed frame 13m to enhance the buffering effect, and the high-voltage electric wire is held by a holder on the side surface of the fixed frame 13m. And buffering.
In addition, although the receiving portion 77 is formed at the space between the spray nozzles 18 and 18 in the vicinity, the electrostatic effect is lowered by setting the end of the hard exterior coating to the position Y slightly upward beyond the spray nozzle 18. Can be configured.
A triangle-shaped protective guide is provided at the front end of the sliding frame 28 s slightly ahead of the front end of the electric part 50. This protective guide protects the tip of the conductive portion 50 and easily avoids an impact at the bottom protruding downward even if the tips of the slide booms 28L, 28R come into contact with the ground.
The boom receiving struts 76L and 76R are provided with boom detection switches 82L and 82R each provided with an actuator 82a that can come into contact with the bottom portions of the side booms 13L and 13R and / or the slide booms 28L and 28R accommodated in the receiving portion 77, respectively. It is composed.
When the left and right boom detection switches 82L and 82R detect the accommodation of the side booms 13L and 13R, the power supply to the second and third conductive portions 50SL and 50SR and the fourth and fifth conductive portions 50LL and 50LR is turned off. It is. In this way, the non-working state of the side booms 13L and 13R and the slide booms 28L and 28R is determined, and the second and third conductive parts 50SL and 50SR and the fourth and fifth conductive parts 50LL are automatically operated during the non-working time. Or 50LR is cut off for convenience. In addition, when giving the operation | movement which leaves | separates the side booms 13L and 13R and the slide booms 28L and 28R from the receiving part 77 by resumption of an operation | work etc., 2nd, 3rd electroconductive part 50SL, 50SR, and 4th, 5th automatically. The conductive portion 50LL or 50LR may be inserted, and the operation of the electrostatic switch 58 may be set as a resumption condition by checking the automatic closing operation to ensure safety.
As described above, the slide booms 28L, 28R slide with respect to the side booms 13L, 13R so that the left and right widths can be arbitrarily expanded and contracted, and the spray nozzles 18, 18 ... of the side booms 13L, 13R are respectively provided. The switching cocks 83, 83... Are provided so as to be linked and switched between the communication side for performing nozzle injection and the blocking side for blocking the nozzles, and switching levers 83 a, 83 a. The engaging portions 84 are provided at the tips of the slide booms 28L, 28R to engage with the switching levers 83a, 83a,... When the engaging portions 84 reciprocate the switching levers 83a, 83a. In the forward stroke in which the slide booms 28L, 28R extend, the switching levers 83a, 83a,... That at the time of backward stroke is adapted to interlock with the switching cock 83 closed to return the dynamic switching lever 83a, a 83a ... in reverse.
Reference numerals 85L and 85R are slide boom storage state detection switches disposed at the bases of the slide booms 28L and 28R, respectively, and slide to the storage side to the contact portions appropriately disposed on the base side of the side booms 13L and 13R. Slide storage can be detected when the switches 85L and 85R collide.
In the state where the side booms 13L, 13R and the slide booms 28L, 28R overlap, spraying from the spray nozzles 18, 18... Of the side booms 13L, 13R is not performed, so the slide boom storage state detection switches 85L, 85R are The second and third electrostatic switches 58SL and 58SR are interlocked with each other when the slide booms 28L and 28R are detected to detect the slide storage state. By cutting off the energization of the second and third inverters 51SL and 51SR to the second and third conductive portions 50SL and 50SR on the side booms 13L and 13R side, wasteful power consumption can be reduced.
In the above embodiment, the slide boom storage state detection switch 85 is provided on the slide booms 28L and 28R side, but it may be provided on the side booms 13L and 13R side, and the slide frames 23L and 23R may be stored by other methods. Any configuration that can be detected is acceptable.

  The controller 41 incorporates power supply switching means K. That is, as shown in FIG. 15, an automatic contact 87 is connected in series to each main electrostatic switch 53. The automatic contact 87 determines whether or not the travel speed v detected by the travel speed detection means S is equal to or lower than a preset low speed side set value v1 (for example, v1 = 0), and as a result, the low speed side set value v1. When it is below, the ON signal is not output and the automatic contact 87 continues to be OFF. Accordingly, when the low speed side set value v1 or less, no electrostatic switch signal is input to the controller 41 even if the electrostatic switch 53 is on. That is, when the traveling speed v of the airframe 1 is “0”, the inverter 51 is not supplied with power, and the conductive portions 50 are not charged. When the traveling speed v exceeds the low speed side predetermined value v1, that is, when the vehicle travels in a predetermined direction, the automatic contact 87 receives the operation signal and turns on the contact. Therefore, by setting the main electrostatic switch 58 to ON in advance, the main electrostatic switch 53 signal is automatically output as the machine body 1 moves forward, and the conductive portion 50 is automatically activated. Turned on. For this reason, since it is automatically turned off without the need to operate the electrostatic switch 56 each time during the spraying work, turning, or work interruption, accidents due to unexpected electric leakage or short circuit (short circuit) can be reduced.

  In addition, the automatic contact 87 is turned off when the travel speed v detected by the travel speed detection means S exceeds a predetermined high speed side predetermined value v2. By setting the high speed side predetermined value v2 at a speed slightly higher than the traveling speed at which the normal spraying operation is performed, the state where the high speed side predetermined value v2 is exceeded, that is, traveling on the road or moving between fields in the non-spraying operation In such a case, it is possible to reduce accidents due to the unexpected electric leakage or short circuit (short circuit) as in the case of stopping the aircraft by turning off the conductive portion 50.

  The operation will be described with reference to the flowchart of FIG.

An unillustrated key switch is turned on to start the engine 1 and energize the controller 41 (step 101). Next, it is determined whether or not the automatic mode is set depending on whether or not the automatic switch 48 is turned on (step 102). After the automatic mode is determined, the spraying amount is set, the control pump drive switch 39, the boom switch 42, the main electrostatic switch 53, each electrostatic switch 58, and the blower switch 92 described later are turned on, and the open / close cock is opened ( Steps 103 to 109), preparation for spraying is performed. When the vehicle body 1 is moved forward by operating the travel lever (step 110), the detection data of the travel speed detection means S is input (step 111), and a predetermined low speed side predetermined value v1 (v1 = 0 in the embodiment) is set. , And a predetermined high speed side predetermined value v2 are compared (steps 112 and 114). When v> v1, the control pump automatic contact 88 is turned on (step 113).
The control pump automatic contact 88 is provided in series with the control pump drive switch 39. When the drive switch 39 is aligned with the ON output of the automatic contact 88 under the ON condition, the control pump 41 outputs the control pump drive. This is a configuration.

  Further, when it is determined in step 114 that v <v2 is within the proper work range, the electrostatic switch automatic contact 87 is turned on, and in combination with the on operation of the main electrostatic switch 53 in step 107, the controller 41 Electric switch-on information is input (step 115). Thus, when the conditions of steps 113 and 115 are satisfied, the spraying operation is performed while controlling the flow rate Q in proportion to the detected traveling speed v (step 116). The control of the flow rate Q is configured to control the flow rate control valve 34 so that the flow rate Q is calculated from the traveling speed v and the set spray amount q (step 118). If the conditions in steps 113 and 115 are not satisfied, the electrostatic switch automatic contact 87 is kept off (step 117).

  Thereafter, the operation is continued until the key switch is turned off. When the key switch is turned off, both the automatic contact 88 for the control pump and the automatic contact 89 for the electrostatic switch are turned off (steps 120 and 121).

In the above example, when the traveling speed v is in the range between the low speed side and the high speed side predetermined values v1 and v2, the spraying operation and the spraying amount control in the automatic mode are performed in a predetermined range. Although it is restrained, especially for restraining on the high speed side, it is not based on the management of the traveling speed v, but detects the operation amount of the operating lever and pedal for driving, for example, the HST lever and HST pedal for HST continuously variable transmission If the airframe is predicted to travel at a predetermined speed or more based on the detection result, both the automatic contact 88 for the control pump and the automatic contact 89 for the electrostatic switch are turned off to restrain the spraying operation. Can do.
FIG. 17 is a flowchart regarding supply voltage control based on spray nozzle type setting. As shown in FIG. 18, the spray nozzles 16, 18, and 29 are all three types of nozzle parts N <b> 1, radially on a rotating part X that is provided to be rotatable about a horizontal axis P with respect to the fixed side of the boom body or the like. N2 and N3 are provided. Here, for example, N1 is sprayed with 100 liters at the conventional nozzle part, N2 is sprayed with 150 liters at the herbicide nozzle part, and N3 is sprayed with 25 liters at the nozzle part for small quantity spraying. In this way, the amount of application is different, but the difference is set by the nozzle diameter. By the way, when taking the combination of the nozzles N1, N2, and N3 having different spraying amounts in this way, it is preferable that the voltage of the conductive portion 50 is also made different. For example, the conventional nozzle part of N1 is 7,000 V, the nozzle part for herbicide of N2 is 10,000 V, and the nozzle part for spraying a small amount of N3 is 5,000 V. For this reason, the inverter 51 as the high-voltage power supply device is provided with a variable dial 90 so that the voltage can be changed, and a voltage set in advance can be selected based on the selection signal. Remember.
On the other hand, between the fixed side L and the rotating portion X with the nozzle portions N1, N2, and N3, a setting nozzle portion detecting means R for determining which nozzle portion is in the downward set position is configured. The detection result is configured so that the control controller 41 can input it. Therefore, the controller 41 discriminates the nozzle portion N1, N2 or N3 based on the detection result of the setting nozzle portion detecting means R, and based on this discrimination, a signal for outputting a preset voltage is supplied to the conductive portion 50. It is the structure which outputs.
In the flowchart shown in FIG. 17, + α and −β with respect to the standard supply voltage are used, but the gist is as described above.
In the above embodiment, the supply voltage is changed to a large or small value based on the change of the nozzle type. However, the supply voltage is changed and controlled based on the change control output to the flow control valve 34. Also good. With this configuration, fine electrostatic spraying control can be performed.

  19 and 20 show an improved configuration around the nozzle portion. In this configuration, a duct 92 is provided on the front side from the blower 91 at the rear of the machine body, and the front end opening of the nozzle 50 is formed from the diagonally upper front of the spray nozzles 16, 18, and 29. Is arranged so as to be sprayed (FIG. 19). By comprising in this way, a water droplet can be removed previously and the deterioration of charging property can be prevented. The blower switch 93 for driving the blower 91 may be a manual switch, but may be configured to have an automatic contact configuration so that the clutch of the blower 91 is turned on at the start of spraying by the travel speed detection.

  In the configuration shown in FIG. 20, the air nozzle 94 is configured so that air is blown in front of the spray nozzles 16, 18, and 29 with the front end opening of the duct 92 facing forward. By configuring in this way, the chemical solution spray rate is improved by the electrostatic device on the back of the leaf and the back of the leaf by spraying the chemical liquid while spraying and reversing the leaves of crops with rich leaves such as soybeans before spraying by air injection. To do.

  In FIG. 21, the chemical solution can be spread over the entire crop by combining the spraying device including the conductive portion 50 of the electrostatic spraying device with the so-called hanging nozzle 95 form. In particular, it is possible to improve the adhesion of the chemical solution to the back of the leaf where the leaves grow and the leaves overlap. It should be noted that the chemical solution spraying is effectively performed by providing the arrangement of the hanging nozzles 95 alternately with respect to the arrangement of the electrostatic nozzles 16, 18, and 29. Further, in addition to the form of the hanging nozzle 95 or separately from the form of the hanging nozzle, a structure is provided that performs good lateral scattering as a structure provided with a gun-type spray nozzle 96 that extends the side booms 13L and 13R. (FIG. 22).

DESCRIPTION OF SYMBOLS 1 Airframe 10 Lifting link mechanism 12 Boom support frame 13L Side boom 13R Side boom 13m Fixed frame 14 Boom support frame 16 Spray nozzle 18 Spray nozzle 28L Slide boom 28R Slide boom 28s Slide frame 29 Spray nozzle 30 Chemical solution tank 41 Control controller 50C 1st 1 conductive part (conductive part)
50SL Second conductive part (conductive part)
50SR Third conductive part (conductive part)
50LL 4th conductive part (conductive part)
50LR 5th conductive part (conductive part)
51C 1st inverter (high voltage power supply)
51SL 2nd inverter (high voltage power supply)
51SR 3rd inverter (high voltage power supply)
51LL 4th inverter (high voltage power supply)
51LR 5th inverter (high voltage power supply)
58C 1st electrostatic switch (electrostatic switch)
58SL Second electrostatic switch (electrostatic switch)
58SR Third electrostatic switch (electrostatic switch)
58LL 4th electrostatic switch (electrostatic switch)
58LR 5th electrostatic switch (electrostatic switch)
82L Boom detection switch 82R Boom detection switch S Traveling speed detection means K Power supply switching means

  The present invention relates to a chemical solution spraying machine, and more particularly to a control work machine equipped with an electrostatic spraying device.

  Conventionally, a field tank is provided with a center boom equipped with a chemical tank at the rear of a traveling machine body and provided with a spraying nozzle for spraying a liquid solution downward in front of the machine body, and a side boom attached to the center boom in an extended state from side to side. The form of spraying chemicals on the crops is well known (Cited document 1), and a strip-shaped conductive part is arranged across a plurality of spray nozzles, and the chemicals from the spray nozzles are charged to efficiently spread the target. The structure made to adhere to the crop etc. of this is known (patent document 2).

  Moreover, the structure provided with the control apparatus which controls automatically a spraying pressure and flow volume in connection with the vehicle speed of the self-propelled spraying machine which sprays a chemical | medical solution while self-propelling is known (patent document 3).

JP 2010-51274 A JP 2008-194673 A JP 2002-253104 A

  By the way, in the said patent document 2, two electroconductive parts are distribute | arranged along the longitudinal direction of a support rod, and the spreading | diffusion of the liquid sprayed from the several spray nozzle arranged in parallel by the longitudinal direction of the support rod Although they are spaced apart from each other in a substantially parallel manner, the voltage supply to the conductive portion, that is, the energization is turned on and off by switching a switch provided in the connected power supply device. That is, by switching the manual switch, once the switch is turned on, it is always energized regardless of the state of chemical spraying, that is, whether it is in the spraying state or in the non-spraying state. However, there are many situations where the spraying is interrupted from the start to the end of the spraying work. Even in such a case, leaving the conductive part in the energized state is more likely to cause an electrical failure such as a leakage or a short circuit. There is room.

  In view of the above, the present invention attempts to eliminate the above-described drawbacks by controlling the energization of the conductive portion so that the energization is not performed more than necessary.

In view of the above problems, the present invention has taken the following technical means.
That is, in the first aspect of the present invention, the base of the lift link mechanism (10) is pivotally supported on the machine body (1) on which the chemical tank (30) is mounted, and the boom support frame (14) is mounted on the lift link mechanism (10). The boom support frame (14) is fixedly provided with a center boom (12) having a plurality of spray nozzles (16, 18) for ejecting a chemical solution, and left and right side booms (13L, 13R). The first conductive part (50C) is provided in the vicinity of the spray nozzles (16, 16,...) Of the center boom (12) so as to be able to open and close in a state of extending to the side of the body and a state of being housed on the side of the body. The second and third conductive portions (50SL, 50SR) are disposed in the vicinity of the spray nozzles (18, 18 ...) of the left and right side booms (13L, 13R), respectively, and the first conductive portion to the third conductive portion. High voltage to (50C, 50SL, 50SR) High voltage power supply device for feeding (51C, 51SL, 51SR) in chemical spraying work machine provided with,
A traveling speed detecting means (S) for detecting the traveling speed of the airframe (1) is provided, and when the detected traveling speed (v) by the traveling speed detecting means is equal to or lower than a predetermined low speed side predetermined value (v1), the first conductive When the high voltage supply to the first to third conductive parts (50C, 50SL, 50SR) is cut off and the detected traveling speed (v) exceeds the low speed side predetermined value (v1), the first conductive part to the third conductive part ( 50C, 50SL, 50SR) is provided with a power supply switching means (K) for switching on a high voltage supply to turn on.
According to the first aspect of the present invention, when the detected travel speed (v) is equal to or less than a predetermined value (v1), for example, “0”, the power feeding switching means (K) is configured to transmit the first conductive portion to the third conductive portion (50C). , 50SL, 50SR), and when the detected traveling speed (v) exceeds a predetermined value (v1), the high voltage to the first to third conductive parts (50C, 50SL, 50SR) Switch supply to on. Therefore, when the speed of the airframe is lower than the low speed side predetermined value (v1), for example, when a non-working state such as airframe stop is assumed, the high voltage supply is cut off, and the working traveling state where the speed of the airframe exceeds the low speed side predetermined value (v1) When it is assumed that a high voltage is supplied.
According to a second aspect of the present invention, when the predetermined high speed side predetermined value (v2) is exceeded based on the detection result of the detected traveling speed (v) of the traveling speed detecting means (S), the first conductive portion to the third portion. It is set as the structure of the chemical | medical solution spraying work machine of Claim 1 made into the structure which cuts off the high voltage supply to an electroconductive part (50C, 50SL, 50SR). Therefore, when detecting a speed state exceeding a predetermined value (v2) on the high speed side where the road traveling state is assumed, the high voltage supply is cut off.
According to a third aspect of the present invention, when the traveling transmission (M) is shifted to a predetermined high speed range, the high voltage supply to the first to third conductive portions (50C, 50SL, 50SR) is cut off. It is set as the structure of the chemical | medical solution spraying work machine of Claim 1 made into the structure. Therefore, when detecting the high speed side shift range where the road running state is assumed, the high voltage supply is cut off.

  According to a fourth aspect of the present invention, the spray amount from the spray nozzles (16, 18) is controlled to be changed in magnitude based on the detection result of the detected traveling speed (v) of the traveling speed detecting means. It is set as the structure of the chemical | medical solution spraying work machine of claim | item 2 or claim 3. Therefore, the amount of spray from the spray nozzles (16, 18) is controlled to be large or small based on the detection result of the detected traveling speed (v).

Since the present invention is configured as described above, the following effects can be obtained.
In other words, according to the first aspect of the present invention, the power supply switching means (K) cuts off the high voltage supply when the speed of the airframe is lower than the low speed side predetermined value (v1), for example, when a non-working state such as the airframe is stopped. It is safe because it does not cause unexpected electrical leakage accidents during non-working or damage due to short circuit. In addition, when a working state where the speed of the machine body exceeds a predetermined value (v1) on the low speed side is assumed, switching to the high voltage supply is performed, so there is no need to manually operate the power supply to the conductive portion, improving operability. .

  Further, according to the invention of claim 2 and claim 3, in addition to the effect of claim 1, when the speed state is assumed to be traveling on the road, the high voltage supply is cut off, so an unexpected electric leakage accident Do not cause damage or short circuit.

  According to the invention of claim 4, in addition to the effect of claim 1 or claim 2, the amount of spray from the spray nozzle (16, 18) is increased or decreased based on the detection result of the detected traveling speed (v). Change control can be achieved and efficient chemical solution consumption can be realized.

It is a whole side view of a passenger management machine. It is a top view of a passenger management machine. It is a front view of a passenger management machine. It is a system configuration diagram. It is a top view of a dispersion | distribution control apparatus. It is a perspective view of the principal part. It is sectional drawing of a side boom and a slide boom. It is a top view which shows an effect | action. (A) The enlarged front view of the principal part of a side boom and a slide boom, (B) It is a perspective view of the one part. (A) Cross-sectional view of conductive part support configuration, (B) exploded perspective view, (C) partial cross-sectional view, (D) enlarged front view of clip. It is a disassembled perspective view of the electroconductive part support structure which shows another example, (B) The sectional drawing, (C) The expanded sectional view of the electroconductive part. (A) It is a partial side view of a side boom and a slide boom in the housed state, (B) a cross-sectional view thereof, and (C) a rear view of the distal end portion. It is an operation explanation front view of a side boom and a slide boom. It is a control block diagram. It is a block diagram. It is a flowchart figure. It is a flowchart figure. It is a nozzle part expansion front view. It is a side view which shows the improved structure of a nozzle part vicinity. (A) The side view which shows the improved structure of the nozzle part vicinity, (B) The front view. It is a front view which shows a different cultivation form. It is a perspective view which shows the example of mounting | wearing with a different spray nozzle.

Embodiments of the present invention will be described below with reference to the drawings. First, in terms of configuration, reference numeral 1 denotes a body of a passenger management machine that mainly performs cult work and control work in a field or paddy field. This passenger management machine includes a front wheel 2 and a rear wheel 3 having the same diameter, and an engine 4 is mounted on the front portion of the body 1. The engine 4 and the muffler (not shown) are covered with a bonnet 5, and masts 7 and 7 are erected on both the left and right sides of the bonnet 5, and the masts 7 and 7 are lifted by an upper link 8 and a lower link 9. A link mechanism 10 is configured. The upper link 8 and the lower link 9 have substantially the same length in the front-rear direction. Therefore, the lifting link mechanism 10 forms a parallelogram when viewed from the side. The elevating link mechanism 10 is raised and lowered by a pair of left and right elevating cylinders 11, 11 provided outside the bonnet 5. The elevating cylinders 11 and 11 are constituted by electric cylinders, but may be constituted by hydraulic pressure.
Further, a support frame 14 for attaching a center boom 12 and side booms 13 and 13, which will be described later, is connected to the front portion of the elevating link 10. The support frame 14 has a rectangular shape when viewed from the front, and a swing shaft 15 extending in the front-rear direction is provided at the lower center of the support frame 14.
The center boom 12 having a pair of front and rear boom frames 12F and 12R is pivotally supported on the swing shaft 15 so as to be pivotable up and down about the front and rear axis, and a plurality of downwardly directed chemical solutions are applied to the front center boom frame 12F. Nozzles 16, 16... That can be ejected are attached.
The left and right side booms 13L and 13R are pivotally supported by left and right end portions of the rear center boom frame 12R by vertical fulcrum pins 17 and 17, and are also spaced at appropriate intervals on the lower end surfaces of the side booms 13L and 13R. A plurality of spray nozzles 18, 18... Accordingly, the center boom 12 and the side booms 13L, 13R can be integrally adjusted around the swing shaft 15 or controlled to swing up and down with the side booms 13L, 13R being expanded.
A hydraulic cylinder mechanism 20 as an actuator is provided in a vertical posture between the support frame 14 side and the rear center boom frame 12R side. Reference numeral 20 a denotes a piston rod of the hydraulic cylinder mechanism 20.
A control valve (not shown) for horizontal control is provided at an appropriate position of the center boom 12, and the center boom 12 and the side boom 13L, by supplying or discharging pressure oil from the hydraulic pump to the hydraulic cylinder mechanism 20 are provided. 13R is configured to swing up and down. Accordingly, when the piston rod 20a of the hydraulic cylinder mechanism 20 expands and contracts, the boom swings around the swing shaft 14. A plate 21 is provided along the vertical direction at the center in the left-right direction of the support frame 14. A swing angle sensor 22 is attached to the plate 21, and a horizontal sensor 23 provided at an appropriate position of the riding management machine 1. The hydraulic cylinder mechanism 20 is expanded and contracted in cooperation with the center boom 12 and the side booms 13L and 13R are horizontally controlled.
Further, in FIG. 1, vertical movement cylinders 25L and 25R are provided between the top of the support frame 14 and the bases of the side booms 13L and 13R. Opening and closing that opens and closes the side booms 13L and 13R between the support frame 14 and the connecting plate 26 that is integral with the bases of the side booms 13L and 13R and can rotate about the fulcrum pins 17 and 17 with respect to the center boom frame 12R. Cylinders 27L and 27R are provided.

  The side booms 13L and 13R are connected to extension slide booms 28L and 28R, respectively. In other words, the side booms 13L and 13R on the fixed side are provided with a linear fixed frame 13m that holds the nozzle 18 and the chemical solution pipe portion 13p (FIG. 3), and can be slid in the longitudinal direction across the fixed frame 13m. The slide frame 28s is provided with the slide booms 28L and 28R on the slide side. The slide booms 28L and 28R are each provided with a pipe portion 28p, and spray nozzles 29, 29.

  A chemical solution tank 30 is mounted on the rear part of the passenger management machine 1, and the chemical solution is supplied to the spray nozzles of the center boom 12, the side booms 13L and 13R, and the slide booms 28L and 28R. That is, in FIG. 4, the chemical liquid stored in the chemical liquid tank 30 is pumped through the main pipe 32 by driving the control pump 31, and branched pipes 33 </ b> C and 33 </ b> S branched into the center boom 12 and the left and right side booms 13 </ b> L and 13 </ b> R side. , 33S to the spray nozzle 16 of the center boom 12, the side booms 13L, 13R and the spray nozzles 18, 29 of the slide booms 28L, 28R. A flow rate control valve 34 is interposed in the original pipe 32 so that the flow rate can be controlled.

  A traveling operation unit such as a steering handle 36 is provided in front of the driver's seat 35 of the riding management machine 1, and a spraying operation panel 37 is provided on the right side of the driver's seat 35. The operation panel 37 includes an opening / closing cock 38C, 38S, 38S corresponding to each of the branch pipes 33C, 33S, 33S, a control controller 41 having a control pump 31 drive switch 39, a liquid crystal display unit 40, and the lifting link mechanism 10. The boom switch 42 for extending and retracting the lifting cylinder 11 that moves up and down, the pair of left and right switches 43L and 43R for expanding and contracting the left and right opening and closing cylinders 27L and 27R, and the left and right side booms 13L and 13R are individually moved up and down. The vertical movement cylinders 25L, 25R extend and contract, and the slide motors 44L, 44R for sliding the slide booms 28L, 28R are mounted with cross lever-type switches 45L, 45R, etc. It can be operated up to. The spraying operation panel 37 in this embodiment can be operated while visually confirming the spray state from the center boom 12, the front booms 13L and 13R, and the slide booms 28L and 28R from the driver's seat 35. Compared to the configuration in which the boom is attached, it is not necessary to take a posture facing the back of the body, which is convenient.

Further, as a configuration related to the control controller 41, operation switches are arranged around the liquid crystal display unit 40, and chemical spraying is performed by setting the spraying amount per unit area by the spraying setting switch 46 and the increase / decrease switch 47 and the machine body 1. And an automatic switch 48 that is turned on when an automatic mode is performed in which the flow rate control valve 34 is automatically controlled based on the travel speed to automatically control the amount of chemical solution sprayed from the spray nozzle. When the spraying operation is performed without turning on the automatic switch 48, the manual mode for always spraying the spraying amount based on the setting of the increase / decrease switch 47 is executed.

  In addition to the individual electrostatic switches 58, the main electrostatic switch 53 may be provided to select a normal spraying mode in which electrostatic spraying is not performed or an electrostatic control mode. Reference numeral 59 denotes a display lamp representing an electrostatic spraying state.

  The spray nozzles 16, 16 ... of the center boom 12, the spray nozzles 18, 18 ... of the side booms 13L, 13R, and the spray nozzles 29, 29 ... of the slide booms 28L, 28R are predetermined along the longitudinal direction of each boom. Two linear conductive parts 50 are arranged in parallel with each other so as to intervene in the diffusion range of the chemical solution from the spray nozzles at intervals, thereby constituting an electrostatic spraying device. The conductive portion 50 is a so-called bar electrode formed by coating a copper wire, a steel pipe, etc. with an insulator and a resin outer layer, and is arranged corresponding to the spray nozzles 16, 16... Of the center boom 12. The second and third conductive portions 50SL and 50SR disposed on the side booms 13L and 13R and the fourth and fifth conductive portions 50LL and 50LR respectively disposed on the slide booms 28L and 28R are associated with each other. Provided. An inverter 51 that functions as a high-voltage power supply device is connected to each of the first to fifth conductive parts 50, and a high voltage is supplied to the conductive part 50 so that the chemical liquid sprayed from the spray nozzles 16, 18, and 29 is used. Negative charge is given. When a negative charge is present in the vicinity of the leaves of a plant, the leaves are positively polarized on the front and back surfaces and negatively inside, so that a negatively charged chemical is attracted to the surface of the crop and also on the leaf surface. It adheres evenly to the back side. Note that the inverter 51 represents a correspondence relationship using the same reference numerals as those of the first to fifth conductive portions. In addition, in the case where the negative charge is charged to the chemical liquid particles, if the cultivation mode is such that the positive electrodes 96, 96... Are embedded in advance near the ground surface, the chemical liquid is attracted to the positive electrode, and as a result Dispersion of chemicals is widespread and uneven dispersion can be reduced.

An electrostatic switch 53 is interposed in the power supply circuit 52 of the electrostatic spraying device so that power supply from the battery 54 can be switched on / off.
The controller 41 comprises travel speed detecting means S. That is, the riding management machine 1 is provided with a traveling transmission device M, and pick-up means 69 (for example, rear axle) that detects and outputs axle rotation to an axle portion that conducts the left and right rear wheels of the transmission mechanism in the traveling transmission device. A controller 41 that inputs the speed data from the pickup means 69 and calculates the traveling speed v of the airframe 1 is calculated from this speed data.

  The electrostatic spraying device will be specifically described below. With respect to the electrostatic spraying device for the center boom 12, the spray nozzles 16, 16,... Are disposed on the front boom frame 12F on the mounting side of the spray nozzles 16, 16,. The first conductive portions 50C and 50C are detachably supported on the support members 55 and 55 by being suspended and supported therebetween. A first inverter 51C is mounted on the upper surface of the front boom frame 12F via a hook-shaped bracket 56.

Similarly, the side booms 13L and 13R have second and third inverters 51SL and 51SR, and the second and third conductive portions 50SL and 50SR, and the slide booms 28L and 28R have fourth and fifth inverters 51LL and 51LR. , And the fourth and fifth conductive portions 50LL, 50LR are mounted. As described above, the side booms 13L and 13R on the fixed side are provided with the linear fixed frame 13m that holds the nozzle 18 and the chemical solution pipe portion 13p, and are slidable in the longitudinal direction across the fixed frame 13m. A slide frame 28s is provided, and slide booms 28L and 28R on the slide side are integrally attached to the slide frame 28s. Further, the relationship between the fixed frame 13m and the slide frame 28s is that the slide booms 28L and 28R are each provided with a pipe portion 28p and provided with spray nozzles 29, 29. The side booms 13L and 13R configured as described above and the slide booms 28L and 28R are in a relationship of being arranged in the front-rear direction so that the slide booms 28L and 28R are on the front side. The second and third inverters 51SL and 51SR are detachably attached to the rear surface of the bracket 57 via the bracket 57 on the base end side of the fixed frame 13m, while the fourth and fourth inverters are directly attached to the front surface of the sliding frame 28s. The fifth inverters 51LL and 51LR are attached to the base end side.

  That is, the fixed frames 13m and the sliding frames 28s of the side booms 13L and 13R are arranged in the front and rear, and the second and third inverters 51SL and 51SR are mounted on the surface opposite to the side on which the sliding frames 28s are present. 4. Since the fifth high-voltage power supply devices 51LL and 51SR are mounted on the surface opposite to the side where the fixed frame 13m exists, the inverters 51SL and 51SR are not provided between the fixed frame 13m and the sliding frame 28s. In addition, the conductive part 50 and the inverter 51 can be easily combined to form an electrostatic spray structure for a model that does not affect the assembly of both the frames 13m and 28s and does not include an electrostatic device.

  Like the center boom 12, biped support members 55, 55,... Are arranged on the fixed frame 13m at predetermined intervals, and the second and third conductive portions 50LL, 50LR for the side booms 13L, 13R are arranged. And the fourth and fifth conductive portions 50LL and 50LR for the slide frames 28L and 28R are attached to the support members 55, 55... On the slide frame 28s side.

  Power is supplied from the battery 54 through the power supply circuit 52 and from the power supply line, and the inverters 51 are energized. Each inverter 51 is configured to be converted to a high voltage, and this high voltage is applied to each conductive portion 50. In the above configuration, since the inverter 51 functioning as a high-voltage power supply device is disposed corresponding to each of the center boom 12, the left and right side booms 13L and 13R, and the left and right slide booms 28L and 28R, the lifting / lowering operation, the folding opening / closing operation, and the slide Although each operation is performed independently, it is possible to smoothly cope with these movements. That is, since the combination with the conductive portion 50 is configured in units of inverters 51 and combined with individual booms, it is not necessary to connect and configure the high-voltage conductive portion 50 at a portion that causes articulation. In other words, when the common inverter 51 is installed in the conductive part 50 of the divided boom, the conductive part 50 is disposed in the joint movement portion, so there is a risk of breakage due to repeated bending operations. When the conductive portion and the inverter are individually combined, it is not necessary to connect the articulating portion with the conductive portion, so that there is no breakage, there is no risk of leakage, and the handling is easy.

  In addition, by providing the first to fifth on / off switches 58 for each inverter 51, only the inverter 51 at a location necessary for the spraying operation can be turned on, and the power to the location where the spraying operation is not performed is turned off. It has the effect of saving power and avoiding unnecessary danger. The same reference numerals are used to clarify the correspondence between the conductive portion 50 and the inverter 51. As the configuration of the on / off switch 58, in addition to the electrostatic switch 53, a circuit for supplying power to each inverter 51 is configured in the power circuit 52, and the first to fifth on / off switches 58 are provided respectively. Further, by providing an on / off switch in a box that accommodates each inverter 51, the power can be arbitrarily turned off.

In the illustrated example, the conductive portions 50 parallel to the left and right are not independently connected, but they may be connected and bent into a U shape to form a parallel state.
FIG. 9 is an enlarged front view of the side booms 13L and 13R and the slide booms 28L and 28R. As described above, the second and third inverters 51SL and 51SR are detachably attached to the base of the fixed frame 13m. A mast 60 is erected in the vicinity of the second and third inverters 51SL and 51SR. A wire 62 is routed between the wire 61 and the coil hose 63. Both are connected so that the high-pressure chemical solution acts on the T-shaped joint 64 from the branch pipe 33S. One of the T-shaped joints 64 is provided with a connection pipe 65 for connection to the side boom 13L or 13R, and the other is connected to the coil hose 63. The terminal end of the coil hose 63 is connected to the connecting pipe 66 connected to the slide boom 28L or 28R. Accordingly, when the slide boom 28L or 28R slides by driving the slide motor 44L or 44R, the chemical solution can be supplied while being extended or shortened by the coil hose 63 and following the movement. In the present embodiment, the wiring portion 67 extending from the power supply circuit 52 is integrally branched to the coil hose 63, and one of them is connected to the second and third inverters 51SL and 51SR of the side boom 13L or 13R, and the other is connected. The extension wiring portion 68 fixed to the coil hose 63 is connected to the fourth and fifth inverters 51LL or 51LR of the slide boom 28L or 28R. If comprised in this way, the intermediate extension wiring part 68 can be accommodated using the coil restoring force of the coil hose 63, and a cost reduction can be aimed at without requiring a separate extension accommodation structure.

  Next, based on FIG. 10, the support structure and the detachable structure of the conductive portion 50 by the support member 55 and the like will be described in detail. The biped support members 55, 55,... Disposed on the fixed frame 13m of the side booms 13L, 13R at predetermined intervals, slide the long support suspension 70 from the fixed frame 13m to the slide booms 28L, 28R. Similarly, biped support members 55, 55,... Arranged on the moving frame 28s at predetermined intervals are supported from the sliding frame 28s via a support suspension 71 having a short length. The reason why the lengths of the support suspensions 70 and 71 are made different is that the positions of the spray nozzles 16, 16... Mounted on the fixed frame 13 m and the top and bottom of the spray nozzles 18, 18. This is because the relative positions with respect to the nozzles 16 and 18 are made common because the positions are different. Thus, by preparing the support suspensions 70 and 71 having different lengths, the distance between the spray nozzles 16 and 18 is set while setting the distance in the horizontal direction by replacing the two legged support members 55 and 55. The leg-shaped support members 55, 55... Can be made common and contribute to cost reduction. The support suspensions 70 and 71 having different lengths can be engaged with the fixed frame 13m and the sliding frame 28s in a sandwiched state by forming a notch in the upper part of a pair of symmetrical U-shaped members. The support member 55 is fastened and fixed with bolts or the like at the lower part.

The biped support member 55 made of resin is formed with locking recesses 55b and 55b having openings 55a and 55a, respectively, at the lower end of the bifurcated shape. The engaging recesses 55b and 55b support and support the conductive portion 50. That is, positioning is performed by the rubber packing 72 that can be fitted to the inner peripheral surfaces of the locking recesses 55b, 55b, and the locking member 73L that can be fixed to the outer periphery of the conductive portion 50 by adjusting the inner diameter freely can be formed. The movement of the conductive portion 50 is restricted by contacting the end surface of the support member 55 to be supported. When the clip member 73R having the same shape is brought into contact with the adjacent support member 55 on the opposite end surface, the conductive portion 50 is restricted from moving in the longitudinal direction. The clip members 73L and 73R may be provided on the left and right sides of the same support member 55 (locking recess 55b) for positioning.

The direction of the locking recesses 55b, 55b is opposite to each other, that is, when the conductive portion 50 is attached or detached,
Since the openings 55a and 55a are opened in a direction away from the support member 55, the work can be efficiently performed with less interference with other objects when the long conductive portion 50 is mounted or separated for replacement. Can be done automatically. FIG. 11 shows a configuration for improving the case where the conductive portions 50 are added and connected. In some cases, the conductive portions 50 may be joined together to ensure a predetermined length. FIG. 11C shows a cross section, in which a wire 50a such as a copper wire in the core is connected to the left and right wires by crimping sleeves 50b and 50b. For this reason, since a part of the connecting wire is exposed, it is dangerous. In this case, as shown in FIGS. 11A and 11B, a protective pipe 75 is provided between a pair of adjacent left and right support members 55, 55. The length of the conductive part 50 can be arbitrarily changed by sandwiching the structure. 50c is a covering material.
As shown in FIG. 12, boom receiving struts 76L and 76R for holding the stored side booms 13L and 13R are erected on the right and left at the rear of the machine body, and a storage receiving portion 77 is formed on the upper part. . The receiving portion 77 is formed of a U-shaped metal fitting, and holds the boom in a state where the slide booms 28L and 28R are slid and overlapped with the side booms 13L and 13R.
Although the receiving part 77 is provided in the middle part of the side booms 13L and 13R so as to avoid the spray nozzles 18, 18... That is, since the conductive portion 50 is configured by the side booms 13L and 13R and the slide booms 28L and 28R, respectively, the conductive portion 50 cannot be directly supported. Instead, a high-voltage electric wire 79 in a twisted and flexible state is formed, and the high-voltage electric wire 79 is covered with an insulator and a flexible outer sheath so as not to interfere with the receiving portion 77 along the fixed frame 13m. With this configuration, electrostatic spraying can be performed over the entire range without dividing the conductive portion 50, and the conductive portion 50 is not damaged when the side booms 13L and 13R are housed. .
As shown in the cross section of FIG. 12B, a rubber-like elastic body is laid on the lower surface of the fixed frame 13m to enhance the buffering effect, and the high-voltage electric wire is held by a holder on the side surface of the fixed frame 13m. And buffering.
In addition, although the receiving portion 77 is formed at the space between the spray nozzles 18 and 18 in the vicinity, the electrostatic effect is lowered by setting the end of the hard exterior coating to the position Y slightly upward beyond the spray nozzle 18. Can be configured.
A triangle-shaped protective guide is provided at the front end of the sliding frame 28 s slightly ahead of the front end of the electric part 50. This protective guide protects the tip of the conductive portion 50 and easily avoids an impact at the bottom protruding downward even if the tips of the slide booms 28L, 28R come into contact with the ground.
The boom receiving struts 76L and 76R are provided with boom detection switches 82L and 82R each provided with an actuator 82a that can come into contact with the bottom portions of the side booms 13L and 13R and / or the slide booms 28L and 28R accommodated in the receiving portion 77, respectively. It is composed.
When the left and right boom detection switches 82L and 82R detect the accommodation of the side booms 13L and 13R, the power supply to the second and third conductive portions 50SL and 50SR and the fourth and fifth conductive portions 50LL and 50LR is turned off. It is. In this way, the non-working state of the side booms 13L and 13R and the slide booms 28L and 28R is determined, and the second and third conductive parts 50SL and 50SR and the fourth and fifth conductive parts 50LL are automatically operated during the non-working time. Or 50LR is cut off for convenience. In addition, when giving the operation | movement which leaves | separates the side booms 13L and 13R and the slide booms 28L and 28R from the receiving part 77 by resumption of an operation | work etc., 2nd, 3rd electroconductive part 50SL, 50SR, and 4th, 5th automatically. The conductive portion 50LL or 50LR may be inserted, and the operation of the electrostatic switch 58 may be set as a resumption condition by checking the automatic closing operation to ensure safety.
As described above, the slide booms 28L, 28R slide with respect to the side booms 13L, 13R so that the left and right widths can be arbitrarily expanded and contracted, and the spray nozzles 18, 18 ... of the side booms 13L, 13R are respectively provided. The switching cocks 83, 83... Are provided so as to be linked and switched between the communication side for performing nozzle injection and the blocking side for blocking the nozzles, and switching levers 83 a, 83 a. The engaging portions 84 are provided at the tips of the slide booms 28L, 28R to engage with the switching levers 83a, 83a,.
4 is when the switching levers 83a and 83a are reciprocated, and during the forward stroke in which the slide booms 28L and 28R extend, the switching levers 83a, 83a,... In the reverse stroke to be shortened, the switching levers 83a, 83a,...
Reference numerals 85L and 85R are slide boom storage state detection switches disposed at the bases of the slide booms 28L and 28R, respectively, and slide to the storage side to the contact portions appropriately disposed on the base side of the side booms 13L and 13R. Slide storage can be detected when the switches 85L and 85R collide.
In the state where the side booms 13L, 13R and the slide booms 28L, 28R overlap, spraying from the spray nozzles 18, 18 ... of the side booms 13L, 13R is not performed.
When the slide boom storage state detection switches 85L and 85R are actuated to detect the slide storage state of the slide booms 28L and 28R, the second and third electrostatic switches 58SL and 58SR are interlocked with each other. By cutting off the energization of the second and third inverters 51SL and 51SR to the second and third conductive portions 50SL and 50SR on the side booms 13L and 13R side, wasteful power consumption can be reduced.
In the above embodiment, the slide boom storage state detection switch 85 is provided on the slide booms 28L and 28R side, but it may be provided on the side booms 13L and 13R side, and the slide frames 23L and 23R may be stored by other methods. Any configuration that can be detected is acceptable.

  The controller 41 incorporates power supply switching means K. That is, as shown in FIG. 15, an automatic contact 87 is connected in series to each main electrostatic switch 53. The automatic contact 87 determines whether or not the travel speed v detected by the travel speed detection means S is equal to or lower than a preset low speed side set value v1 (for example, v1 = 0), and as a result, the low speed side set value v1. When it is below, the ON signal is not output and the automatic contact 87 continues to be OFF. Accordingly, when the low speed side set value v1 or less, no electrostatic switch signal is input to the controller 41 even if the electrostatic switch 53 is on. That is, when the traveling speed v of the airframe 1 is “0”, the inverter 51 is not supplied with power, and the conductive portions 50 are not charged. When the traveling speed v exceeds the low speed side predetermined value v1, that is, when the vehicle travels in a predetermined direction, the automatic contact 87 receives the operation signal and turns on the contact. Therefore, by setting the main electrostatic switch 58 to ON in advance, the main electrostatic switch 53 signal is automatically output as the machine body 1 moves forward, and the conductive portion 50 is automatically activated. Turned on. For this reason, since it is automatically turned off without the need to operate the electrostatic switch 56 each time during the spraying work, turning, or work interruption, accidents due to unexpected electric leakage or short circuit (short circuit) can be reduced.

  In addition, the automatic contact 87 is turned off when the travel speed v detected by the travel speed detection means S exceeds a predetermined high speed side predetermined value v2. By setting the high speed side predetermined value v2 at a speed slightly higher than the traveling speed at which the normal spraying operation is performed, the state where the high speed side predetermined value v2 is exceeded, that is, traveling on the road or moving between fields in the non-spraying operation In such a case, it is possible to reduce accidents due to the unexpected electric leakage or short circuit (short circuit) as in the case of stopping the aircraft by turning off the conductive portion 50.

The operation will be described with reference to the flowchart of FIG.
An unillustrated key switch is turned on to start the engine 1 and energize the controller 41 (step 101). Next, it is determined whether or not the automatic mode is set depending on whether or not the automatic switch 48 is turned on (step 102). After the automatic mode is determined, the spraying amount is set, the control pump drive switch 39, the boom switch 42, the main electrostatic switch 53, each electrostatic switch 58, and the blower switch 92 described later are turned on, and the open / close cock is opened ( Steps 103 to 109), preparation for spraying is performed. When the vehicle body 1 is moved forward by operating the travel lever (step 110), the detection data of the travel speed detection means S is input (step 111), and a predetermined low speed side predetermined value v1 (v1 = 0 in the embodiment) is set. , And a predetermined high speed side predetermined value v2 are compared (steps 112 and 114). When v> v1, the control pump automatic contact 88 is turned on (step 113).
The control pump automatic contact 88 is provided in series with the control pump drive switch 39. When the drive switch 39 is aligned with the ON output of the automatic contact 88 under the ON condition, the control pump 41 outputs the control pump drive. This is a configuration.

  Further, when it is determined in step 114 that v <v2 is within the proper work range, the electrostatic switch automatic contact 87 is turned on, and in combination with the on operation of the main electrostatic switch 53 in step 107, the controller 41 Electric switch-on information is input (step 115). Thus, when the conditions of steps 113 and 115 are satisfied, the spraying operation is performed while controlling the flow rate Q in proportion to the detected traveling speed v (step 116). The control of the flow rate Q is configured to control the flow rate control valve 34 so that the flow rate Q is calculated from the traveling speed v and the set spray amount q (step 118). If the conditions in steps 113 and 115 are not satisfied, the electrostatic switch automatic contact 87 is kept off (step 117).

  Thereafter, the operation is continued until the key switch is turned off. When the key switch is turned off, both the automatic contact 88 for the control pump and the automatic contact 89 for the electrostatic switch are turned off (steps 120 and 121).

In the above example, when the traveling speed v is in the range between the low speed side and the high speed side predetermined values v1 and v2, the spraying operation and the spraying amount control in the automatic mode are performed in a predetermined range. Although it is restrained, especially for restraining on the high speed side, it is not based on the management of the traveling speed v, but detects the operation amount of the operating lever and pedal for driving, for example, the HST lever and HST pedal for HST continuously variable transmission If the airframe is predicted to travel at a predetermined speed or more based on the detection result, both the automatic contact 88 for the control pump and the automatic contact 89 for the electrostatic switch are turned off to restrain the spraying operation. Can do.
FIG. 17 is a flowchart regarding supply voltage control based on spray nozzle type setting. As shown in FIG. 18, the spray nozzles 16, 18, and 29 are all three types of nozzle parts N <b> 1, radially on a rotating part X that is provided to be rotatable about a horizontal axis P with respect to the fixed side of the boom body or the like. N2 and N3 are provided. Here, for example, N1 is sprayed with 100 liters at the conventional nozzle part, N2 is sprayed with 150 liters at the herbicide nozzle part, and N3 is sprayed with 25 liters at the nozzle part for small quantity spraying. In this way, the amount of application is different, but the difference is set by the nozzle diameter. By the way, when taking the combination of the nozzles N1, N2, and N3 having different spraying amounts in this way, it is preferable that the voltage of the conductive portion 50 is also made different. For example, the conventional nozzle part of N1 is 7,000 V, the nozzle part for herbicide of N2 is 10,000 V, and the nozzle part for spraying a small amount of N3 is 5,000 V. For this reason, the inverter 51 as the high-voltage power supply device is provided with a variable dial 90 so that the voltage can be changed, and a voltage set in advance can be selected based on the selection signal. Remember.
On the other hand, between the fixed side L and the rotating portion X with the nozzle portions N1, N2, and N3, a setting nozzle portion detecting means R for determining which nozzle portion is in the downward set position is configured. The detection result is configured so that the control controller 41 can input it. Therefore, the controller 41 discriminates the nozzle portion N1, N2 or N3 based on the detection result of the setting nozzle portion detecting means R, and based on this discrimination, a signal for outputting a preset voltage is supplied to the conductive portion 50. It is the structure which outputs.
In the flowchart shown in FIG. 17, + α and −β with respect to the standard supply voltage are used, but the gist is as described above.
In the above embodiment, the supply voltage is changed to a large or small value based on the change of the nozzle type. However, the supply voltage is changed and controlled based on the change control output to the flow control valve 34. Also good. With this configuration, fine electrostatic spraying control can be performed.

19 and 20 show an improved configuration around the nozzle portion. In this configuration, a duct 92 is provided on the front side from the blower 91 at the rear of the machine body, and the front end opening of the nozzle 50 is formed from the diagonally upper front of the spray nozzles 16, 18, and 29. Is arranged so as to be sprayed (FIG. 19). By comprising in this way, a water droplet can be removed previously and the deterioration of charging property can be prevented. The blower switch 93 for driving the blower 91 may be a manual switch, but may be configured to have an automatic contact configuration so that the clutch of the blower 91 is turned on at the start of spraying by the travel speed detection.

  In the configuration shown in FIG. 20, the air nozzle 94 is configured so that air is blown in front of the spray nozzles 16, 18, and 29 with the front end opening of the duct 92 facing forward. By configuring in this way, the chemical solution spray rate is improved by the electrostatic device on the back of the leaf and the back of the leaf by spraying the chemical liquid while spraying and reversing the leaves of crops with rich leaves such as soybeans before spraying by air injection. To do.

  In FIG. 21, the chemical solution can be spread over the entire crop by combining the spraying device including the conductive portion 50 of the electrostatic spraying device with the so-called hanging nozzle 95 form. In particular, it is possible to improve the adhesion of the chemical solution to the back of the leaf where the leaves grow and the leaves overlap. It should be noted that the chemical solution spraying is effectively performed by providing the arrangement of the hanging nozzles 95 alternately with respect to the arrangement of the electrostatic nozzles 16, 18, and 29. Further, in addition to the form of the hanging nozzle 95 or separately from the form of the hanging nozzle, a structure is provided that performs good lateral scattering as a structure provided with a gun-type spray nozzle 96 that extends the side booms 13L and 13R. (FIG. 22).

DESCRIPTION OF SYMBOLS 1 Airframe 10 Lifting link mechanism 12 Boom support frame 13L Side boom 13R Side boom 13m Fixed frame 14 Boom support frame 16 Spray nozzle 18 Spray nozzle 28L Slide boom 28R Slide boom 28s Slide frame 29 Spray nozzle 30 Chemical solution tank 41 Control controller 50C 1st 1 conductive part (conductive part)
50SL Second conductive part (conductive part)
50SR Third conductive part (conductive part)
50LL 4th conductive part (conductive part)
50LR 5th conductive part (conductive part)
51C 1st inverter (high voltage power supply)
51SL 2nd inverter (high voltage power supply)
51SR 3rd inverter (high voltage power supply)
51LL 4th inverter (high voltage power supply)
51LR 5th inverter (high voltage power supply)
58C 1st electrostatic switch (electrostatic switch)
58SL Second electrostatic switch (electrostatic switch)
58SR Third electrostatic switch (electrostatic switch)
58LL 4th electrostatic switch (electrostatic switch)
58LR 5th electrostatic switch (electrostatic switch)
82L Boom detection switch 82R Boom detection switch S Traveling speed detection means K Power supply switching means

Claims (4)

The base of the lift link mechanism (10) is pivotally supported on the machine body (1) on which the chemical liquid tank (30) is mounted, and the boom support frame (14) is provided on the lift link mechanism (10). And a center boom (12) provided with a plurality of spray nozzles (16, 18) for ejecting a chemical solution, respectively, and a state in which the left and right side booms (13L, 13R) extend to the side of the machine body. The first conductive part (50C) is provided in the vicinity of the spray nozzles (16, 16,...) Of the center boom (12) so that it can be opened and closed in a state of being housed on the side of the machine body, and left and right side booms (13L, 13R). ) In the vicinity of the spray nozzles (18, 18...), The second and third conductive parts (50SL, 50SR) are arranged respectively, and the first to third conductive parts (50C, 50SL, 50SR) are high. High-voltage power supply that supplies voltage (5 (C, 51SL, 51SR) is provided with a traveling speed detecting means (S) for detecting the traveling speed of the airframe (1), and the detected traveling speed (v) by the traveling speed detecting means is preset. When the low speed side predetermined value (v1) is less than or equal to the high voltage supply to the first to third conductive parts (50C, 50SL, 50SR), the detected travel speed (v) is set to the low speed side predetermined value (v1). ), A power supply switching means (K) for switching the high voltage supply to the first conductive part to the third conductive part (50C, 50SL, 50SR) on is provided. Based on the detection result of the detected traveling speed (v) of the traveling speed detecting means (S), the first conductive portion to the third conductive portion (50C, 50SL, 50SR) when a predetermined high speed side predetermined value (v2) is exceeded. The chemical | medical solution spraying work machine of Claim 1 made into the structure which cuts off the high voltage supply to a. The high-voltage supply to the first conductive part to the third conductive part (50C, 50SL, 50SR) is cut off when the travel transmission (M) is shifted to a predetermined high speed range. Chemical spraying machine. The spray amount from the spray nozzles (16, 18) is controlled to be changed in magnitude based on the detection result of the detected travel speed (v) of the travel speed detecting means. Chemical spraying machine.

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