JP2010022380A - Agrochemical spreader mounted on rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agrochemical spreader mounted on rice transplanter avoiding faults caused by breakage of a cable and carrying out spreading even in scattering mud without any trouble. <P>SOLUTION: The agrochemical spreader mounted on rice transplanter includes a signal transmitting system 5a generating cyclic signals synchronized with the transplanting operation of the rice transplanter and converting the signals into a radio wave and transmitting to space, a receiver receiving the radio wave signal transmitted from the signal transmitting system 5a, and a spreading mechanism for spreading the agrochemical which spread the chemicals by receiving the radio signals as a trigger. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rice transplanter-mounted agricultural chemical spraying device.

  A rice planter-mounted pesticide spraying device that is mounted on a rice transplanter and sprays granular pesticides in parallel with rice planting work has been proposed (for example, Patent Document 1 below). This spraying device employs a non-contact type proximity switch that can detect the approach of a bolt that triggers the operation using a change in a magnetic field.

JP 11-308959 A

  In the rice transplanter-mounted pesticide spraying device described above, the unit including the proximity switch and the unit including the spraying mechanism are arranged separately on the front and back of the machine with the seedbed bed in between, and the seedbed bed is straddled between both units. Communication cables and power supply cables are wired. By the way, when the planting operation is performed by the rice transplanter, the nursery bed reciprocates, so care must be taken not to interfere with the nursery bed when wiring a communication cable or a power feeding cable. If care is taken without care, the cable may interfere with the nursery bed, causing disconnection and possibly causing the spraying device to malfunction.

  In addition, since the rice planting work is performed in paddy fields that have been filled with water, it is impossible to completely prevent mud splashing even if the rice transplanter is operated carefully. In the rice transplanter-mounted pesticide spraying device described above, if mud splash generated during the rice planting operation adheres to the bolt or the proximity switch, the magnetic field may not easily change even if the proximity switch approaches the bolt. In this case, a signal for operating the spraying mechanism is not transmitted, which may hinder the spraying work.

  The present invention has been made in view of the above circumstances, and is intended to provide a rice transplanter-mounted pesticide spraying device that can avoid problems caused by cable disconnection and can continue spraying work without any problem even if mud splashing occurs. It is intended to provide.

    As a means for solving the above problems, a rice transplanter-mounted pesticide spraying device having the following configuration is adopted. That is, the rice transplanter-mounted pesticide spraying apparatus of the present invention is a rice planter-mounted pesticide spraying apparatus that sprays granular pesticides in parallel with the rice planting operation: periodically in synchronism with the planting operation of the rice transplanter. A signal transmission device that generates a signal, converts the signal into a radio wave and transmits the signal to space; a signal reception unit that receives a radio signal transmitted from the signal transmission device; and the radio signal is received by the signal reception unit The signal transmission device is fixed to one of two members whose relative distances periodically change with the planting operation. A magnet; a signal generation unit that generates a signal; a radio wave transmission unit that converts the signal generated by the signal generation unit into a radio wave and transmits; and generates power to be supplied to the signal generation unit and the radio wave transmission unit The sun A pond; a switch that is fixed to the other of the two members and operates by changing a distance from the magnet, and that secures a power supply path from the solar cell to the signal generation unit and the radio wave transmission unit; Is provided.

In the present invention, since the signal for operating the spreading mechanism is wirelessly communicated between the signal transmission device and the signal receiving unit, it is not necessary to wire a cable between the two units as in the conventional case.
Further, in the present invention, when the distance between the magnet and the switch is changed, the switch is activated and power is supplied from the solar cell to drive the signal generation unit and the radio wave transmission unit, and the signal generation unit generates a signal. The radio wave transmission unit converts the signal generated by the signal generation unit into a radio wave and transmits the radio wave.

  The rice planter-installed pesticide spraying apparatus of the present invention includes a disk that is rotatably supported by the other member and rotates in two forward and reverse directions with the reciprocating movement of the nursery bed, and the magnet includes the circle The side of the plate is fixed at a position away from the center of the disk, and the switch is fixed at a position where the distance between the switch and the magnet displaced with the rotation of the disk periodically changes. preferable.

  In the present invention, when the disc is rotated in either the forward or reverse direction, the magnet fixed to the side surface of the disc rotates with the disc. When the magnet rotates together with the disk, the distance between the magnet and the switch periodically changes, and the magnet periodically approaches and separates from the switch. When the distance between the magnet and the switch changes, the switch operates to supply power from the solar cell, and a signal is transmitted as described above.

  The rice transplanter-mounted pesticide spraying apparatus of the present invention comprises: a second urging member that urges the disk in a reverse rotation direction; one end fixed to the disk and wound around the disk And having the other end fixed to the nursery bed, the wire against the biasing force of the second biasing member as the nursery bed moves in one direction. The disk is rotated in the forward direction in the process of being sent out from the disk and sent out from the disk; the disk according to the biasing force of the second biasing member as the nursery bed moves in the other direction It is preferable that the disk is rotated in the reverse direction in the process of being wound on the disk.

  In the present invention, when the nursery bed moves in one direction, the wire is sent out from the disk against the urging force of the second urging member, and the disk rotates in the forward direction in the process. When the disc rotates in the positive direction, the magnet rotates in the positive direction together with the disc, and periodically approaches and separates from the switch. Further, when the nursery bed moves in the other direction, the wire is sent out to the disk according to the urging force of the second urging member, and the disk rotates in the reverse direction in the process. When the disc rotates in the reverse direction, the magnet rotates in the reverse direction together with the disc, and periodically approaches and separates from the switch. That is, even if the nursery bed moves in any direction, the magnets periodically approach and separate from the switch in the same manner, and an electromotive force is generated in the coil as described above.

  According to the rice planter-mounted agricultural chemical spraying device of the present invention, a signal for operating the spraying mechanism is wirelessly communicated between the signal transmission device and the signal receiving unit, so that a cable is connected between the two units as in the past. There is no need for wiring, and there are no problems caused by cable disconnection.

It is a perspective view which shows 1st Embodiment of the rice transplanter mounting type agrochemical spraying apparatus of this invention. It is the schematic which shows the structure of a dispersion | spreading operation control apparatus. It is an external view of a signal transmission system. It is a top view which shows the internal structure of the casing which incorporates a signal transmission system and a magnet displacement mechanism. It is a schematic diagram which shows the positional relationship of a main lever, a sublever, and a transmission device. It is an external view which shows the state which mounted the casing which incorporates a signal transmission system and a magnet displacement mechanism in the rice transplanter. It is a schematic diagram without occupying another example when mounting a magnet and a transmitting device on a rice transplanter. It is the schematic without occupying the other example at the time of similarly mounting a magnet and a transmitter on a rice transplanter. It is a figure which shows 2nd Embodiment of the rice planter mounting type agrochemical spraying apparatus of this invention, Comprising: It is the schematic which shows the structure of a spraying operation control apparatus. It is a top view which shows the internal structure of the casing which incorporates a signal transmission system and a magnet displacement mechanism.

A first embodiment of the present invention will be described in detail with reference to FIGS.
The rice planter-mounted pesticide spraying device (hereinafter referred to as a spraying device) of the present embodiment is a spraying mechanism 1 for spraying agricultural chemicals and a spraying operation control for causing the spraying mechanism to spray agricultural chemicals in synchronization with the planting work of the rice transplanter. The apparatus 2 is provided. As shown in FIG. 1, the spraying mechanism 1 includes a battery pack 3 that supplies power to each drive unit of the spraying mechanism 1, and a switch box that includes a main switch 4 a that intermittently supplies power from the battery pack 3 to the spraying mechanism 1. 4 is provided. The spraying mechanism 1, the battery pack 3, and the switch box 4 are fixed to a portal frame F <b> 1 erected on the rear side of the nursery bed S. The battery pack 3 can be repeatedly charged using a commercial power source.

  As shown in FIG. 2, the spreading operation control device 2 periodically generates a predetermined signal in synchronization with the planting operation of the rice transplanter, converts the signal into a radio wave, and transmits the signal to the space (signal). (Transmitting device) 5, radio wave signal receiving unit (signal receiving unit) 6 that receives a radio signal transmitted from the signal transmission system 5, and spreading mechanism 1 triggered by the reception of the radio signal by the radio signal receiving unit 6 And a solenoid control section 7 for operating a solenoid (not shown). When the radio signal is received by the radio signal receiver 6, the spray mechanism 1 opens a shielding valve (not shown) connected to the solenoid and sprays the agricultural chemical. Note that the structure of the spraying mechanism 1 including the solenoid and the shielding valve is described in detail in the above-mentioned Patent Document 1 (Japanese Patent Laid-Open No. 11-308959), and is omitted here.

  The signal transmission system 5 includes a magnet 8 and a transmission device 10. The magnet 8 is a neodymium magnet or a ferrite magnet. The transmitting device 10 includes a coil 12 that generates an electromotive force when the distance to the magnet 8 changes relatively, an iron core 13 around which the coil 12 is wound, and an oscillator (signal generation unit) 14 that generates a predetermined signal. And a radio wave signal transmission unit 15 that converts a signal generated by the oscillator 14 into a radio wave and transmits the radio wave, and a constant voltage conversion unit 16 that makes the electromotive force generated by the coil 12 constant. Both the oscillator 14 and the radio signal transmitter 15 are driven by the electromotive force generated by the coil 12.

  The oscillator 14 generates an electrical oscillating current having the same frequency as the radio wave to be transmitted. This is called a vibration wave. The radio wave signal transmission unit 15 includes an amplifier 17 that amplifies the signal generated by the oscillator 14, and a transmission antenna 18 that radiates the vibration wave amplified by the amplifier 17 to the space as an electromagnetic wave.

  As shown in FIG. 3, each device constituting the transmission device 10 is built in a case 19 made of resin (for example, polypropylene) having a bottomed cylindrical shape. A cap 19 a made of resin (for example, polyethylene terephthalate) is attached to the side surface of the case 19 on the side where the coil 12 and the iron core 13 are built in order to prevent interference between the magnet 8 and the coil 12. Yes. The surface to which the cap 19 a is attached is the magnetic field detection surface 10 a of the transmission device 10. The transmitting antenna 18 employs a resin-coated soft cord. The magnet 8 and the transmitter 10 are accommodated in a two-part resin casing (housing) 20. The transmission device 10 is fixed at a fixed position of one casing 20.

  The signal transmission system 5 further includes a magnet displacement mechanism 11 that periodically displaces the magnet 8 in accordance with the planting operation of the rice transplanter. As shown in FIG. 4, the magnet displacement mechanism 11 includes a main lever (first lever) 21, a sub lever (second lever) 22, and a lever driving mechanism 23. The magnet displacement mechanism 11 is also accommodated in the casing 20. The main lever 21 is pivotally supported on one casing 20 so as to be swingable with Om as a fulcrum. The main lever 21 is L-shaped, and a fulcrum Om is provided on the long shaft portion 21a side of the two long and short shaft portions. A long hole 21c is formed in the long shaft portion 21a of the main lever 21 on the tip side of the fulcrum Om along the longitudinal direction of the long shaft portion 21a. The sub lever 22 is pivotally supported at one end of the main lever 21 so as to be swingable with Os as a fulcrum. The sub-lever 22 has an I-shape and is provided with a fulcrum Os at substantially the center. The shaft 21s that supports the main lever 21 and the shaft 22s that supports the sub lever 22 are arranged in parallel, and both the levers 21 and 22 swing in the same plane. The lever drive mechanism 23 is attached to one casing 20 and pushes or pulls the other end of the main lever 21 using the reciprocating motion of the nursery bed.

  The magnet 8 is fixed to one end of the sub lever 22. One end of a tension coil spring (first urging member) 24 is locked to the other end of the sub lever 22. The other end of the tension coil spring 24 is locked to the long shaft portion 21 a of the main lever 21. The tension coil spring 24 exerts a biasing force so as to draw the other end of the sub lever 22 toward the main lever 21 side.

The positional relationship within the casing 20 of the transmission device 10, the main lever 21, and the sub lever 22 will be schematically described with reference to FIG. FIG. 5A shows the arrangement of the levers 21 and 22 in a state where the magnet 8 fixed to one end of the sub-lever 22 is attracted to the magnetic field detection surface 10a of the transmitting device 10, and FIG. 8 shows the arrangement of the levers 21 and 22 in a state where 8 is the most spaced from the magnetic field detection surface 10a. Here, the three members are viewed in a plan view from a direction perpendicular to the surface on which the levers 21 and 22 swing, and the magnetic field detection surface 10a faces the plane F including the magnetic field detection surface 10a of the transmitter 10 as a reference. The direction that is present is the upward direction.
The main lever 21 has a fulcrum Om below the plane F including the magnetic field detection surface 10a of the transmitting device 10, and the tip of the short shaft portion 21b on which the fulcrum Os of the sub lever 22 is arranged is Even if 21 swings, it is attached so that it always exists above the plane F including the magnetic field detection surface 10a. Even if the main lever 21 oscillates, the auxiliary lever 22 always exists above the plane F including the magnetic field detection surface 10a, and one end to which the magnet 8 is fixed is above the magnetic field detection surface 10a. It is attached so as to swing within the region.

  As shown in FIG. 4, the lever driving mechanism 23 includes a disk 25 having a protrusion 25 a formed on a side surface, a torsion coil spring (second urging member) 26, and a wire 27. The disc 25 is supported so as to be rotatable around the central axis 25b in either the forward or reverse direction. The protrusion 25 a is provided at a position spaced from the center of the disc 25 and is slidably fitted in a long hole 21 c formed in the main lever 21. The torsion coil spring 26 always exerts a biasing force in the direction in which the disk 25 is rotated in the reverse direction. One end of the wire 27 is fixed to the disc 25 and is wound around the disc 25.

  As shown in FIG. 6, the casing 20 that houses the magnet 8, the transmitter 10, and the magnet displacement mechanism 11 is fixed via a bracket B to a support frame F <b> 2 on the rice transplanter main body side that supports the nursery bed so as to be reciprocally movable. Has been. On the other hand, the other end of the wire 27 is fixed to an arbitrary portion of the nursery bed S that reciprocates via a chain 27c.

  The radio signal receiver 6 and the solenoid controller 7 are built in the switch box 4 on the spreading mechanism 1 side. As shown in FIG. 2, the radio signal receiver 6 receives a reception antenna 28 that receives electromagnetic waves radiated from the transmission antenna 18 into the space, and a voltage induced in the reception antenna 28 by the received electromagnetic waves to a predetermined magnitude. And an amplifier 29 for amplifying the signal. When the voltage amplified by the amplifier 29 is applied, the solenoid control unit 7 drives the solenoid to open the shielding valve (not shown) of the spray mechanism 1.

A method of operating the spraying device configured as described above will be described.
First, a rice transplanter with a bundle of seedlings mounted on a nursery bed is placed in the paddy field, and the main switch 4a is connected. When the main switch 4a is connected, electric power is supplied from the battery pack 3 to a motor (not shown) built in the spreading mechanism 1, and the motor is driven to rotate the impeller (not shown).

  When the planting operation is started by operating the rice transplanter, the nursery bed starts reciprocating in synchronism with the scraping operation of the seedling by the scraping claw. When the nursery bed moves in one direction, that is, in the forward direction, the casing 20 fixed to the support frame is separated from the place where the other end of the wire 27 of the nursery bed is fixed. Thereby, the wire 27 is pulled out from the disc 25 against the urging force of the torsion coil spring 26, and the disc 25 rotates in the forward direction. Moreover, when the nursery bed moves in the other direction, that is, the return path direction, the casing 20 fixed to the support frame and the place of the nursery bed where the other end of the wire 27 is fixed approach each other. Thereby, the wire 27 is wound around the disc 25 according to the urging force of the torsion coil spring 26, and the disc 25 rotates in the forward direction. That is, the disc 25 rotates alternately in two directions, forward and backward, with the reciprocating movement of the nursery bed which is part of the planting operation of the rice transplanter.

  When the disk 25 rotates in either the forward or reverse direction, the protrusion 25 a formed on the side surface of the disk 25 rotates together with the disk 25. At this time, when the lever drive mechanism 23 is viewed from a direction parallel to the side surface of the disk 25, the protrusion 25a appears to periodically reciprocate. Since the protrusion 25a is fitted in a long hole 21c formed at the other end of the main lever 21, the other end of the main lever 21 is pushed and pulled by the protrusion 25a that reciprocates. As a result, the main lever 21 periodically swings around its own fulcrum Om.

  When the main lever 21 periodically swings about its fulcrum Om, the sub-lever 22 pivotally supported at one end of the main lever 21 approaches and separates from the magnetic field detection surface 10a of the transmitting device 10. When the sub lever 22 approaches and separates from the magnetic field detection surface 10a, the magnet 8 fixed to one end of the sub lever 22 also approaches and separates from the magnetic field detection surface 10a.

  When the main lever 21 swings and the magnet 8 approaches the magnetic field detection surface 10a of the transmitter 10, the magnetic field around the coil 12 and the iron core 13 built in the transmitter 10 changes, and the coil 12 and the iron core 13 are changed. The magnetic flux density of the magnetic field acting on the becomes higher. As a result, electromagnetic induction occurs in the coil 12, and electromotive force is generated at both ends of the coil 12. The generated electromotive force is adjusted to a constant voltage by the constant voltage converting unit 16 and then supplied to the oscillator 14 and the amplifier 17 to drive them. The oscillator 14 generates an electric oscillating current having the same frequency as the radio wave to be transmitted (this is called an oscillating wave). The amplifier 17 amplifies the vibration wave generated in the oscillator 14 as necessary and applies it to the transmission antenna 18. The transmitting antenna 18 radiates the energy of the given vibration wave to space as an electromagnetic wave (radio wave). The electromagnetic wave radiated from the transmission antenna 18 is received by the reception antenna 28 of the radio signal receiver 6 and induces a voltage at the reception antenna 28. The voltage induced in the receiving antenna 28 by receiving the electromagnetic wave is amplified to a predetermined magnitude by the amplifier 29 and applied to the solenoid control unit 7. When a voltage of a predetermined magnitude is applied, the solenoid control unit 7 drives the solenoid and opens the shielding valve of the spray mechanism 1. When the shielding valve is opened, fine pesticides flow down from the housing part (not shown) toward the impeller, and are repelled and scattered by the rotating impeller.

  More specifically, in the process in which the main lever 21 swings and the magnet 8 approaches the magnetic field detection surface 10a of the transmitter 10 (see FIG. 5B), the distance between the magnet 8 and the magnetic field detection surface 10a is By narrowing, the attractive force between the two becomes stronger and exceeds the urging force of the tension coil spring 24. In this case, the magnet 8 is attracted to the magnetic field detection surface 10a, and one end of the sub lever 22 that was initially biased in the direction away from the magnetic field detection surface 10a by the tension coil spring 24 is instantaneously directed toward the magnetic field detection surface 10a. Rocks. That is, since the magnet 8 fixed to one end of the sub lever 22 approaches the coil 12 and the iron core 13 at a very high speed, the action of electromagnetic induction occurs strongly and a good large electromotive force is generated.

  On the other hand, in the process in which the main lever 21 swings in the opposite direction and the magnet 8 moves away from the magnetic field detection surface 10a of the transmitter 10 (see FIG. 5A), the position of the magnetic field detection surface 10a and the main lever 21 is determined. From the relationship, the magnet 8 is displaced obliquely above the magnetic field detection surface 10a so as to slide on the magnetic field detection surface 10a. At this time, since the magnet 8 is attracted to the magnetic field detection surface 10a, the sub lever 22 swings in the direction opposite to the main lever 21 against the urging force of the tension coil spring 24 around its fulcrum Os. Then, the state in which the magnet 8 is attracted to the magnetic field detection surface 10a is to be maintained. Therefore, the magnet 8 initially moves so as to slide on the magnetic field detection surface 10a (arrow I in the figure). Eventually, when the urging force of the tension coil spring 24 increases and the sub lever 22 reaches the limit of the movable range, a component in a direction away from the magnetic field detection surface 10a is added to the moving component of the magnet 8, and the magnet 8 is moved to the magnetic field detection surface 10a. Is displaced obliquely upward with respect to the magnetic field detection surface 10a. That is, if the magnet 8 is separated in a direction opposite to the attracting force with respect to the magnetic field detection surface 10a, a strong force is required in proportion to the strength of the attracting force, but the magnet 8 is slid on the magnetic field detection surface 10a. If the magnet 8 is separated from the magnetic field detection surface 10a as described above, the magnet 8 is separated in a direction crossing the direction of action of the attracting force, so that the magnet 8 can be separated from the magnetic field detection surface 10a even with a relatively weak force. it can.

  As described above, in synchronization with the planting operation of the rice transplanter, the magnet 8 periodically approaches and separates from the magnetic field detection surface 10a of the transmission device 10, and the transmission device 10 is moved each time the magnet approaches the magnetic field detection surface 10a. A radio wave signal is emitted, the radio wave signal receiving unit 6 receives the radio wave signal, and when the radio wave signal is received by the radio wave signal receiving unit 6, the spraying mechanism 1 operates to spray the agricultural chemical.

  In the present embodiment, as two members whose relative distances periodically change with the planting operation of the rice transplanter, a main lever 21 that is pivotally supported at one point and is rocked while being fixed at a fixed position. The casing 20 that supports the main lever 21 is employed, the magnet 8 is fixed to one end of the main lever 21, and the transmitter 10 incorporating the coil 12 is fixed to the casing 20. By the way, in the present embodiment, not limited to the above, for example, a nursery pad push rod (see FIGS. 17 and 18 of JP-A-11-308959) is used as one member, and is positioned in the vicinity of this push rod. The machine 8 of the rice transplanter to be used may be the other member, and the magnet 8 may be fixed to the push rod, and the transmitting device 10 may be fixed to the machine of the rice transplanter via a bracket or the like. Or you may fix the transmitter 10 to an extrusion rod, and may fix the magnet 8 to the body of a rice transplanter.

As shown in FIG. 7, the planting claw 30 for planting a seedling is used as one member, and the machine body (for example, a member that supports a nursery bed) 31 located in the vicinity of the planting claw 30 is used as the other member. It is also possible to fix the magnet 8 through the bracket 32 and the transmitter 10 through the bracket 33 to the body 31 of the rice transplanter. In this case, since the two planting claws 30 move circularly apart from each other in a common circulation path, power generation is performed each time the planting claws 30 approach the magnetic field detection surface 10a of the transmission device 10, and a signal is transmitted. Is done. The transmitting device 10 may be fixed to the planting claw 30 and the magnet 8 may be fixed to the body 31 of the rice transplanter.
As shown in FIG. 8, a shaft 34 that rotates in synchronism with the planting operation of the rice transplanter is used as one member, and a rice planter body 35 located in the vicinity of the shaft 34 is used as the other member. 36 may be fixed, one or a plurality of magnets 8 may be attached around the ring 36, and the transmitting device 10 may be fixed to the body 35 of the rice transplanter via a bracket or the like.

  Further, in this embodiment, a two-stage lever having the main lever 21 provided with the sub-lever 22 is adopted. However, when a sufficient electromotive force can be obtained only by swinging one end of the main lever 21, the sub-lever A structure in which the magnet 8 is fixed to one end of the main lever 21 without providing the cover 22 may be adopted.

  In the present embodiment, the battery pack 3 is mounted on the rice transplanter and power is supplied from the battery pack 3 to each drive unit of the spraying mechanism 1. It is also possible to employ a structure in which power is supplied to each drive unit of the mechanism 1 and no battery pack is mounted.

Next, a second embodiment of the present invention will be described in detail with reference to FIG. 9 and FIG. In addition, the same code | symbol is attached | subjected to the component already demonstrated in the said 1st Embodiment, and description is abbreviate | omitted.
In the spraying device of this embodiment, the structure of the signal transmission system which comprises the spraying operation control apparatus 2 differs from the said 1st Embodiment. As shown in FIG. 9, the signal transmission system 5 a of the present embodiment includes a magnet 8 and a transmission device 110. The transmitting device 110 operates when the oscillator 14 that generates a predetermined signal, the radio signal transmitter 15 that converts the signal generated by the oscillator 14 into a radio wave, and the solar cell 111 and the magnet 8 approach each other. And a switch 112 that secures a power supply path from the solar cell 111 to the oscillator 14 and the radio signal transmitter 15. Both the oscillator 14 and the radio signal transmitter 15 are driven by the electric power generated by the solar cell 111. Between the solar cell 111 and the oscillator 14 and the radio signal transmission unit 15, a power supply cable 113 that supplies power generated by the solar cell 111 to the oscillator 14 and the radio signal transmission unit 15 is connected (this power supply cable). 113 constitutes a power supply path). The switch 112 is provided in the middle of the power supply cable 113. The switch 112 includes a movable contact 112a and a spring 112b that biases the movable contact 112a, and a magnetic material is provided on a part or all of the movable contact 112a. The magnet 8 and the transmitter 110 are housed inside a two-part resin casing (housing) 120. The transmitting device 110 is fixed at a fixed position of one casing 120.

  The signal transmission system 5a further includes a magnet displacement mechanism 114 that periodically displaces the magnet 8 in accordance with the planting operation of the rice transplanter. The structure of the magnet displacement mechanism 114 is similar to the lever drive mechanism 23 of the first embodiment, and as shown in FIG. 10, a disk 125 that fixes the magnet 8 to the side surface, a torsion coil spring 126, Wire 127 is provided. The magnet displacement mechanism 114 is also accommodated in the casing 120. The disc 125 is supported so as to be rotatable in both forward and reverse directions around the central axis. The magnet 8 is provided at a position separated from the center of the disc 125. The torsion coil spring 126 always exerts an urging force in the direction in which the disk 125 is rotated in the reverse direction. One end of the wire 127 is fixed to the disk 125 and is wound around the disk 125. The switch 112 is fixed at an eccentric position with respect to the disc 125, and when the disc 125 rotates, the magnet 8 approaches and separates from the switch 112.

A method of operating the spraying device configured as described above will be described.
When the planting operation is started by operating the rice transplanter, the nursery bed starts reciprocating in synchronism with the scraping operation of the seedling by the scraping claw. When the nursery bed moves in one direction, that is, in the forward direction, the casing 120 fixed to the support frame is separated from the portion of the nursery bed where the other end of the wire 127 is fixed. As a result, the wire 127 is pulled out of the disk 125 against the urging force of the torsion coil spring 126, and the disk 125 rotates in the forward direction. Further, when the nursery bed moves in the other direction, that is, in the return direction, the casing 120 fixed to the support frame and the place of the nursery bed where the other end of the wire 127 is fixed approach each other. Thereby, the wire 127 is wound around the disc 125 according to the urging force of the torsion coil spring 126, and the disc 125 rotates in the forward direction. That is, the disk 125 rotates alternately in two directions, forward and reverse, with the reciprocating movement of the nursery bed that is part of the planting operation of the rice transplanter. When the disc 125 rotates in either the forward or reverse direction, the magnet 8 fixed to the side surface of the disc 125 rotates with the disc 125. At this time, when the magnet displacement mechanism 114 is viewed from a direction parallel to the side surface of the disk 125, the magnet 8 periodically approaches and separates from the switch 112.

  When the magnet 8 approaches the switch 112, a magnetic force acts on the movable contact 112a, the movable contact 112a swings against the biasing force of the spring 112b, and the contact is closed. When the contact is closed, power is supplied from the solar cell 111 to the oscillator 14 and the amplifier 17 to drive them. Thereafter, as in the first embodiment, the transmitter 110 transmits a radio signal, and the radio receiver 6 receives the radio signal. When the radio wave receiving unit 6 receives the radio wave signal, the solenoid control unit 7 drives the solenoid and opens the shielding valve of the spraying mechanism 1. When the shielding valve is opened, fine pesticides flow down from the accommodating portion (not shown) of the spray mechanism 1 toward the impeller, and are scattered and scattered by the rotating impeller.

  On the other hand, when the magnet 8 is separated from the switch, the magnetic force acting on the movable contact 112a is weakened, and the movable contact 112a swings in the reverse direction according to the urging force of the spring 112b to open the contact. When the contact is opened, the power supply path from the solar cell 111 to the oscillator 14 and the amplifier 17 is cut off.

  As described above, in synchronization with the planting operation of the rice transplanter, the magnet 8 periodically approaches and separates from the transmitter 110, and whenever the magnet 8 approaches the transmitter 110, the transmitter 110 emits a radio signal, When the radio wave receiving unit 6 receives the radio wave signal and the radio wave signal is received by the radio wave receiving unit 6, the spraying mechanism 1 operates to spray the agricultural chemical.

  By the way, in this embodiment, although the solar cell 111 was employ | adopted as an electric power supply source to the oscillator 14 and the amplifier 17, since the electric power generation amount of a solar cell is increased / decreased by sunshine adjustment, electric power is supplemented when there is little electric power generation amount In order to do so, an auxiliary battery may be incorporated. Moreover, it may replace with a solar cell and may employ | adopt a general storage battery. When a storage battery is adopted, it is necessary to replace it periodically, but it is more effective than the solar battery 111 in that a stable power supply can be performed without being influenced by the weather or the like.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to said embodiment. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention. The present invention is not limited by the above description, and is limited only by the matters described in the claims.

  The present invention is a rice transplanter-mounted pesticide spraying device that sprays granular pesticides in parallel with rice planting work: a signal is periodically generated in synchronization with the planting operation of the rice transplanter, and this signal is converted into a radio wave. A signal transmitting device for converting and transmitting to the space; a signal receiving unit for receiving the radio signal transmitted from the signal transmitting device; and operating when the radio signal is received by the signal receiving unit, A spray mechanism for spraying agricultural chemicals, wherein the signal transmission device includes a magnet fixed to one of two members whose relative distance periodically changes with the planting operation; and a signal generation unit that generates a signal A radio wave transmitter that converts the signal generated by the signal generator into a radio wave and transmits the radio wave; a solar cell that generates power to be supplied to the signal generator and the radio wave transmitter; and Fixed to the other Operates by the distance between the magnet changes, switches and to ensure the power supply path from the solar cell to the signal generator and the radio signal transmitting unit; about rice transplanter mounted pesticide spraying device comprising a. According to the rice planter-mounted agricultural chemical spraying apparatus of the present invention, it is not necessary to wire a cable between two units as in the prior art, and there is no problem caused by disconnection of the cable.

  1: spreading mechanism, 2: spreading operation control device, 5: signal transmission system (signal transmission device), 6: radio wave signal reception unit (signal reception unit), 8: magnet, 10: transmission device, 10a: magnetic field detection surface, 11: Magnet displacement mechanism, 12: Coil, 13: Iron core, 14: Oscillator (signal generation unit), 15: Radio wave signal transmission unit, 21: Main lever (first lever), 22: Sub lever (second lever) Lever), 23: lever drive mechanism, 24: tension coil spring (first urging member), 25: disc, 25a: protrusion, 26: torsion coil spring (second urging member), 27: wire, 111: Solar cell, 112: switch

Claims (3)

A rice planter-mounted pesticide sprayer that sprays granular pesticides in parallel with rice planting operations:
A signal transmission device that periodically generates a signal in synchronization with the planting operation of the rice transplanter, converts the signal into a radio wave, and transmits the signal to space;
A signal receiving unit for receiving a radio wave signal transmitted from the signal transmitting device;
A trigger mechanism that operates when the radio signal is received by the signal receiver, and sprays the pesticide; and
The signal transmission device is:
A magnet fixed to one of the two members whose relative distance changes periodically with the planting operation;
A signal generator for generating a signal;
A radio wave transmitter that converts the signal generated by the signal generator into a radio wave and transmits the radio wave;
A solar cell that generates power to be supplied to the signal generator and the radio wave transmitter;
A switch fixed to the other of the two members and operated by changing a distance from the magnet, and securing a power supply path from the solar cell to the signal generation unit and the radio wave transmission unit. Machine-mounted pesticide sprayer. A disk that is rotatably supported by the other member and that rotates in two forward and reverse directions with the reciprocating movement of the nursery bed,
The magnet is fixed to a side surface of the disk, at a position spaced from the center of the disk,
2. The rice transplanter-mounted pesticide spraying apparatus according to claim 1, wherein the switch is fixed at a position where a distance between the switch and the magnet that is displaced as the disk rotates is periodically changed. A second urging member that urges the disk in a reverse direction;
A wire having one end fixed to the disk and wound around the disk, and the other end fixed to the nursery bed;
The wire is fed out from the disc against the biasing force of the second biasing member as the nursery bed moves in one direction, and the disc is moved in the process of being fed out from the disc. Rotate in the direction;
3. The disc is wound around the disc according to the biasing force of the second biasing member as the nursery bed moves in the other direction, and the disc is rotated in the reverse direction in the course of being caught in the disc. The rice transplanter-mounted pesticide spraying device described in 1.

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