JP2007089472A - Electric circuit structure of working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric circuit structure having high durability when constructing an information means so as to act intermittently by using a flasher unit in the electric circuit structure of a working vehicle. <P>SOLUTION: The electric circuit structure has an electric generator 19, the flasher unit 24 and the information means 26, and the flasher unit 24 and the information means 26 are parallelly connected with the generator 19. The electric circuit structure also has detection means 28, 29 for turning the flasher unit 24 and the information means 26 into energized states based on the detection of a prescribed condition. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, in a work vehicle such as a riding rice transplanter or an agricultural tractor, a notification state (for example, detection of a state in which the number of seedlings on the seedling table in the riding rice transplanter is less than a predetermined value) is detected. The present invention relates to an electric circuit structure for operating a warning lamp, a warning buzzer, etc.

  A passenger rice transplanter, which is an example of a work vehicle, includes a cell motor, a generator, a regulator, and a battery, and the power from the generator driven by the engine is regulated to 12 volts by the regulator and is stored in the battery. There is what I did. On the other hand, some low-priced passenger rice transplanters are equipped with a recoil starter for starting the engine without a cell motor, a regulator and a battery.

  In a passenger rice transplanter equipped with a recoil starter as described above, as disclosed in Patent Document 1, a warning buzzer (Patent Document 1) is connected to a generator driven by an engine (101 in FIG. 18 of Patent Document 1). 1 in FIG. 18 (FIG. 18) (an example of a notification unit) and the like are connected in series. Thus, for example, when a state in which the seedling on the seedling table is less than a predetermined amount is detected, the switch (116 in FIG. 18 of Patent Document 1) is turned on and the warning buzzer is turned on and activated. To do.

Japanese Patent Laying-Open No. 2004-49058 (FIG. 18)

When a passenger-type rice transplanter equipped with a recoil starter is provided with an electric circuit structure as described above, a flasher unit is used when the notification means is operated intermittently.
An object of the present invention is to obtain a highly durable electric circuit structure in the electric circuit structure of a work vehicle when the notification means is operated intermittently using a flasher unit.

(Constitution)
The first feature of the present invention resides in the following configuration in the electric circuit structure of a work vehicle.
A generator driven by the engine, a flasher unit, and a notification unit are provided, and the flasher unit and the notification unit are connected in parallel to the generator. Detecting means for energizing the flasher unit and the notifying means based on detection of a predetermined state is provided.

(Function)
The flasher unit is generally a contact that combines a hot wire and a bimetal. If the ON state (energized state) continues for a set time, it will automatically turn off (shut off) due to the displacement of the bimetal due to heat generation. If the state (cutoff state) continues for the set time, it automatically turns on (energized state) due to the displacement of the bimetal due to heat dissipation, and automatically turns on (energized state) and OFF state (cutoff state) ) And repeat.

According to the first feature of the present invention, when the flasher unit and the notification means are energized based on the detection of the predetermined state, when the flasher unit is in the OFF state (cut-off state), the current mainly passes the notification means. When the notification means operates normally and the flasher unit is in the ON state (energized state), the current mainly flows through the flasher unit, and the notification means substantially stops its operation. As described above, when the flasher unit repeats the ON state (energized state) and the OFF state (blocked state), the notification unit repeats the operation and the stop state (the notification unit operates intermittently).
In this case, in the operating state of the notification means, the voltage between the terminals of the flasher unit and the notification means is made substantially constant by the pressure adjusting function of the notification means, so that an excessive voltage is not applied to the flasher unit.

(The invention's effect)
According to the first aspect of the present invention, in the electric circuit structure of the work vehicle, when the notification means is operated intermittently using the flasher unit, the excessive voltage is not applied to the flasher unit. As a result, it is possible to prevent the flasher unit from being damaged by the application of an excessive voltage, and the durability of the electric circuit structure can be improved.

  As shown in FIG. 1, an engine 3 and a transmission case 4 are provided at the front of the aircraft supported by the front wheels 1 and the rear wheels 2, and a four-link type link mechanism 5 is provided at the rear of the aircraft by a hydraulic cylinder 6. The seedling planting device 7 is supported by the link mechanism 5 so as to be movable up and down, and a riding type rice transplanter as an example of a work vehicle is configured.

  As shown in FIG. 1, the seedling planting device 7 includes a transmission case 8, a rotation case 9 that is rotatably supported on the right and left sides of the transmission case 8, and a pair of plantings provided at both ends of the rotation case 9. The arm 10, the grounding float 11, the seedling base 12, and the like are provided. Thus, as the seedling platform 12 is driven to reciprocate in the left-right direction, the rotary case 9 is rotationally driven, and the planting arm 10 alternately takes out the seedlings from the lower part of the seedling platform 12 and puts them on the rice field. Plant.

  As shown in FIG. 1, a hopper 14 made of transparent resin for storing fertilizer, a feeding portion 15 for feeding the fertilizer from the hopper 14, and a blower 16 are provided on the rear side of the driver seat 13, and are provided on the grounding float 11. A hose 18 is connected across the groove forming device 17 and the feeding portion 15. As a result, the fertilizer in the hopper 14 is fed out by the feeding section 15 as the seedlings are planted, and the fertilizer is supplied to the grooving device 17 via the hose 18 by the wind from the blower 16. Fertilizer is supplied to the grooves formed on the rice field.

Next, the electric circuit structure will be described.
As shown in FIG. 2, a DC generator 19 (dynamo) driven by the engine 3 is provided, and a cell motor (not shown), a regulator (not shown), and a battery (not shown) are provided. A recoil starter (not shown) for starting the engine 3 is provided.

  As shown in FIG. 2, a wiring unit 20 is provided, and right and left headlamps 22, a main switch 23, and a flasher unit 24 provided on a generator 19 and a bonnet 21 (see FIG. 1) covering the engine 3. , A warning lamp 26 (corresponding to the notification means) provided in the center mascot 25 (see FIG. 1), a planting switch 27, and a seedling remaining amount sensor 28 ( (Corresponding to detecting means), fertilizer remaining amount sensor 29 (corresponding to detecting means) provided on the right side and left side inside the hopper 14, clutch switch 30 (safety switch), start control device 31 (safety unit) and ignition A device 32 (igniter) is connected to the wiring unit 20.

  As shown in FIG. 1, in the wiring unit 20, the generator 19 is connected to a ground 41 that is grounded to the engine 3, and the right and left headlamps 22 are parallel to the wiring 33 connected to the generator 19. The wiring 33 is connected to the lighting terminal 23 a of the main switch 23 in series with the right and left headlamps 22. The start terminal 23b of the main switch 23 and the start control device 31 are connected via a wiring 34, and the main switch 23 is connected to a grounding part 36 grounded to the fuselage via a wiring 35, and is grounded to the fuselage. A grounding unit 37 is provided in the start control device 31, and an ignition device 32 that ignites a spark plug (not shown) and the start control device 31 are connected via a wiring 38.

  As shown in FIG. 2, a stop pedal 39 is provided, and when the stop pedal 39 is depressed, a main clutch (not shown) that transmits the power of the engine 3 to the transmission case 4 is operated in a disconnected state. When a brake (not shown) for braking the front wheel 1 and the rear wheel 2 is operated to the braking side and the stop pedal 39 is returned, the main clutch is operated to the transmission state and the brake is operated to the release side. The clutch switch 30 and the start control device 31 are connected via a wiring 40, and the clutch switch 30 is operated by a stop pedal 39.

  Thus, as shown in FIG. 2, the start control device 31 operates the contact of the main switch 23 to the position of the start terminal 23b and pulls the recoil starter while the stop pedal 39 is depressed. Since the ignition device 32 is activated and the engine 3 can be started, the stop pedal 39 may be returned after the engine 3 is started. Even if the contact of the main switch 23 is operated to the position of the start terminal 23b or the recoil starter is pulled while the stop pedal 39 is returned, the start control device 31 does not activate the ignition device 32. The engine 3 cannot be started.

  As shown in FIG. 2, after the engine 3 is started, the right and left headlamps 22 can be turned on by operating the contact of the main switch 23 to the position of the lighting terminal 23a. In this case, when the rotation speed of the engine 3 increases, the power generation amount of the generator 19 increases, the right and left headlamps 22 become brighter, and when the rotation speed of the engine 3 decreases, the power generation amount of the generator 19 increases. The right and left headlamps 22 become darker as they become smaller.

  As shown in FIG. 2, inside the wiring unit 20, the wiring 42 is branched in parallel from the wiring 33, and the wirings 43 and 44 are branched in parallel from the wiring 42, so that the wiring 43 is connected to the flasher unit 24. The wiring 44 is connected to the alarm lamp 26. The flasher unit 24 is a contact that combines a heat wire and a bimetal. If the ON state (energized state) is continued for a set time, it is automatically turned OFF (shut off) due to the displacement of the bimetal due to heat generation. If the state (cutoff state) continues for the set time, it automatically turns on (energized state) due to the displacement of the bimetal due to heat dissipation, and automatically turns on (energized state) and OFF state (cutoff state) ) And repeat.

  As shown in FIG. 2, the planting switch 27 is connected to the wiring 45 where the wirings 43 and 44 are joined inside the wiring unit 20, and the seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 are connected to the planting switch 27. Are connected in parallel. The seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 are normally in an OFF state. When the amount of seedlings on the seedling surface of the seedling setting table 12 is less than a predetermined amount, the seedling remaining amount sensor 28 is turned on. When the fertilizer in the hopper 14 becomes less than a predetermined amount, the remaining fertilizer sensor 29 is turned on.

  As shown in FIG. 2, an elevating lever 46 (operable to an ascending position, a neutral position, a descending position, and a planting position) is provided on the right side of the driver seat 13, and the elevating lever 46, the planting switch 27, Are linked. When the elevating lever 46 is operated to the ascending position, the seedling planting device 7 is driven to rise by the hydraulic cylinder 6 in a state where a planting clutch (not shown) that transmits power to the seedling planting device 7 is operated in a disconnected state. Then, when the planting switch 27 is operated in the OFF state and the elevating lever 46 is operated to the neutral position, the hydraulic cylinder 6 is stopped and the planting switch 27 is operated with the planting clutch operated in the disengaged state. It is operated to the OFF state.

  As shown in FIG. 2, when the elevating lever 46 is operated to the lowered position, the seedling planting device 7 is driven downward by the hydraulic cylinder 6 while the planting clutch is operated in the disengaged state, and the planting switch 27 is turned on. When the grounding float 11 touches the rice field, the automatic lift control is started when the grounding float 11 is brought into contact with the rice field (planting the seedling by the hydraulic cylinder 6 so that the height from the rice field to the seedling planting device 7 is maintained at the set value. The device 7 is automatically driven up and down). When the elevating lever 46 is operated to the planting position, the planting clutch is operated in the transmission state in a state where the automatic elevating control is performed, and planting of the seedling by the seedling planting device 7 is started. The switch 27 is operated to the ON state.

As a result, as shown in FIG. 2, in the state where the elevating lever 46 is operated to the planting position (the planting switch 27 is operated to the ON state), the seedling on any seedling surface of the seedling platform 12 is It is assumed that the seedling remaining amount sensor 28 or the fertilizer remaining amount sensor 29 is turned on because the amount of fertilizer in the hopper 14 is less than the predetermined amount or the amount of fertilizer in the hopper 14 is decreased below the predetermined amount.
In this state, when the flasher unit 24 is in an OFF state (cut-off state), the current in the wiring 42 mainly flows through the alarm lamp 26 and the alarm lamp 26 is lit. In this case, since the voltage between the terminals of the flasher unit 24 and the alarm lamp 26 is made substantially constant by the pressure adjusting function of the alarm lamp 26, an excessive voltage is not applied to the flasher unit 24. When the flasher unit 24 is turned on (energized state), the current in the wiring 42 mainly flows through the flasher unit 24, and the alarm lamp 26 is turned off (or darkened).
As described above, when the flasher unit 24 repeats the ON state (energized state) and the OFF state (blocked state), the alarm lamp 26 is repeatedly turned on and off (flashes) (the alarm lamp 26 operates intermittently). ).

  As described above, if the seedling remaining amount sensor 28 or the fertilizer remaining amount sensor 29 is turned on in a state where the elevating lever 46 is operated to the planting position (a state where the planting switch 27 is operated to the ON state), the flasher The alarm lamp 26 is blinked by the unit 24, and the amount of seedling on any seedling surface of the seedling platform 12 is less than a predetermined amount, or the fertilizer of the hopper 14 is less than a predetermined amount. Is notified to the operator.

[First Alternative Embodiment of the Invention]
Instead of FIG. 2 in the above [Best Mode for Carrying Out the Invention], a configuration as shown in FIG. 3 may be used.
In FIG. 3, in addition to the flasher unit 24 and the alarm lamp 26 being connected in parallel, an alarm buzzer 47 (corresponding to the notification means) is connected in parallel, and the seedling remaining amount sensor 28 and the fertilizer residue are connected. In addition to the quantity sensor 29, an alarm stop relay switch 48, a seedling residual amount relay switch 49, a fertilizer residual amount relay switch 50, and a stop switch 51 are provided.

  3 and FIG. 4, when the stop switch 51 is in the OFF state, the seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 are in the OFF state (the amount of seedlings on the seedling setting surface of the seedling setting table 12 is larger than a predetermined amount. If the amount of fertilizer in the hopper 14 is larger than the predetermined amount), the alarm lamp 26 and the alarm buzzer 29 are stopped (see state 1). In the OFF state of the stop switch 51, one of the seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 is in an ON state and the other is in an OFF state (whether the number of seedlings on the seedling surface of the seedling platform 12 is less than a predetermined amount, Or, when the fertilizer in the hopper 14 is less than a predetermined amount), the flasher unit 24 causes the alarm lamp 26 to blink (operating state), and the alarm buzzer 47 operates intermittently (operating state) (see state 2). ).

  As shown in FIGS. 3 and 4, in the state where the alarm lamp 26 blinks (actuated state) and the alarm buzzer 47 operates intermittently (actuated state) (refer to the state 2) by the flasher unit 24, the stop switch 51 is set. When the push operation is performed (ON state), the alarm buzzer 47 is stopped while maintaining the state where the alarm lamp 26 blinks by the flasher unit 24 (operation state) (see state 3). Even if the return operation is performed (OFF state), the stop state of the alarm buzzer 47 is maintained (see state 4).

  Next, as shown in FIG. 3 and FIG. 4, in the OFF state of the stop switch 51, one of the seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 is in the ON state and the other is in the OFF state (see state 4). When both the seedling remaining amount sensor 28 and the fertilizer remaining amount sensor 29 are in an ON state (a state in which the number of seedlings on the seedling setting table 12 is smaller than a predetermined amount and the amount of fertilizer in the hopper 14 is smaller than a predetermined amount). The alarm buzzer 47 operates intermittently (operating state) (see state 5) in a state (operating state) in which the alarm lamp 26 blinks by the flasher unit 24.

[Second Embodiment of the Invention]
As shown in FIG. 1, the hopper 14 and the feeding portion 15 (the blower 16 is not used) are placed on the seedling platform 12 with respect to the mid-mount type having the hopper 14, the feeding portion 15 and the blower 16 on the rear side of the driver seat 13. In the case of the rear mount type supported by the transmission case 8 at the rear side (right side of the paper in FIG. 1) (when the hopper 14, the feeding portion 15, the groover 17, and the hose 18 are optionally installed as a rear mount type) Instead of the above-mentioned [Best Mode for Carrying Out the Invention] in FIG. 2 and [First Alternative Embodiment of the Invention] in FIG. 3, it may be configured as shown in FIG.

  As shown in FIG. 5, an AC generator 52 (alternator) driven by the engine 3 is provided, and a headlamp 22 and a headlamp switch 54 are connected to a wiring 53 connected to the generator 52. Yes. The flasher unit 24 and the alarm lamp 26 are connected in parallel to the wiring 55 connected in parallel to the wiring 53, and the planting switch 27 that is turned on when the elevating lever 46 is operated to the planting position and A seedling remaining amount sensor 28 is connected to the flasher unit 24 and the alarm lamp 26. The AC circuit is configured as described above.

  As shown in FIG. 5, wirings 56 and 57 are extended from the AC circuit, and a relay switch 58 configured by adding one of the seedling remaining amount sensors 28 is connected in series to the wiring 56 so that the fertilizer residue can be obtained. An amount sensor 29 and a fertilizer clogging sensor 59 (corresponding to detection means) are connected in parallel. The fertilizer clogging sensor 59 detects the clogging of the fertilizer in the grooving device 17, and the fertilizer clogging sensor 59 is normally in an OFF state. Turns on. As described above, the wirings 56 and 57, the relay switch 58, the fertilizer remaining amount sensor 29, the fertilizer clogging sensor 59, and the like constitute a DC circuit.

As a result, as shown in FIG. 5, in the state where the lifting lever 46 is operated to the planting position (the state where the planting switch 27 is operated to the ON state), the seedling on any seedling surface of the seedling setting table 12 Is less than the predetermined amount and the seedling remaining amount sensor 28 is turned on, the warning lamp 26 is blinked by the flasher unit 24.
Next, in a state where the lifting lever 46 is operated to the planting position (a state where the planting switch 27 is operated to the ON state), the fertilizer in the hopper 14 is less than a predetermined amount, or the fertilizer in the grooving device 17 is reduced. When clogging occurs and the fertilizer remaining amount sensor 29 or the fertilizer clogging sensor 59 is turned on, one of the seedling remaining amount sensors 28 is turned on by the relay switch 58, and the flasher unit 24 blinks the alarm lamp 26. It becomes a state to do.

[Third Another Embodiment of the Invention]
In FIG. 2 and FIG. 3 of the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment], an AC generator 19 is used instead of the DC generator 19. Also good.
In the above-mentioned [Best Mode for Carrying Out the Invention] in FIG. 2, an alarm buzzer 47 may be used instead of the alarm lamp 26, or both the alarm lamp 26 and the alarm buzzer 47 may be used.

2, 3 and 5 in the above-mentioned [Best Mode for Carrying Out the Invention] [First Alternative Embodiment of the Invention] [Second Alternative Embodiment of the Invention] ) (Not shown) (instead of the alarm lamp 26 and the alarm buzzer 47, a winker is used).
The present invention can be applied not only to riding type rice transplanters but also to notifying means used in working vehicles such as riding type direct seeders, agricultural tractors, combines, and construction machines.

Overall side view of riding rice transplanter Diagram showing electrical circuit structure The figure which shows the electric circuit structure of 1st another form of implementation of invention. The figure which shows the operating state of the electric circuit structure of 1st another form of implementation of invention. The figure which shows the electric circuit structure of 2nd another form of implementation of invention.

Explanation of symbols

3 Engine 19, 52 Generator 24 Flasher unit 26, 47 Notification means 28, 29, 59 Detection means

Claims (1)

A generator driven by the engine, a flasher unit, and a notification unit, and the flasher unit and the notification unit connected to the generator in parallel,
An electric circuit structure of a work vehicle provided with detection means for energizing the flasher unit and the notification means based on detection of a predetermined state.

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