JP2011050343A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable to carry out safe and exact operation in a state in which an operator has got off in comparatively frequent operations such as continuous seedling feeding and seedling replenishment accompanied by decrease of a residual amount of mat seedlings placed on a seedling-placing stand by quickly decreasing the number of revolutions of an engine to an idling state without operated by the operator, as well as preventing unexpected stop of the number of revolutions of the engine, when carrying out a ridge crossing by self travelling movement and loading and unloading operations to and from the loading platform of a truck. <P>SOLUTION: There is provided a means 81 for controlling the number of revolutions of the engine automatically decreasing the number of revolutions of the engine E to the idling state, when seedling shortage is detected by a sensor 61 for detecting the amount of residual seedlings or fertilizer shortage is detected by a sensor 62 for detecting the amount of residual fertilizer, as well as a non-seated state of the operator to an operation seat 12 is detected by a sensor 73 for detecting a seated state, wherein alarming means 72a, 72b for informing the operator of a state of the seedling shortage or the fertilizer shortage are in an active state and a parking brake is operating. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention connects a planting work machine to a rear side of a traveling machine body having a traveling wheel through an elevating link mechanism so as to be movable up and down, and scrapes off a mat seedling placed on a seedling stage by the power of an engine. The present invention relates to engine speed control in a riding type rice transplanter provided with a planting device to be planted in a plant and a fertilizer applying fertilizer stored in a fertilizer tank to a field when a mat seedling is planted by the planting device.

  In conventional passenger-type rice transplanters, for the purpose of improving fuel consumption and reducing noise, a specific position where the main shift lever, which is a shift operation tool for driving, brings the vehicle to a stop state, that is, the main shift lever is in the neutral position. The remaining amount of the seedling detection sensor detects that the remaining amount of the mat seedling placed on the seedling table is reduced. Condition or the condition that the upper limit switch has detected that the planting machine has been raised to the upper limit position is satisfied, and the operator has stood up from the driver's seat for a predetermined time or more in order to perform seedling joining or seedling supplementing work. It is known that an automatic engine stop means for automatically stopping the engine when it is detected is detected (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2006-94753 (page 6-8, FIGS. 7 to 10)

  However, in the case of a riding type rice transplanter, when carrying out the overloading by self-propelled movement or the loading / unloading work of the transport vehicle to the loading platform, the operator gets out of the riding type rice transplanter in order to perform these operations safely and accurately. In general, as in the riding rice transplanter of Patent Document 1, the main transmission lever is operated to the neutral position and is placed on the seedling platform. Conditions such as the state where the remaining amount of mat seedling placed has been detected by the seedling remaining amount detection sensor or the state where the upper limit switch has detected that the planting machine has been raised to the upper limit position are satisfied. If the engine is automatically stopped when it is detected that the operator has stood up from the driver's seat for a predetermined time or more, the engine will not be restarted unless the engine is restarted. There is an inconvenience in terms of workability because unloading operations to loading platform of the transport vehicle can not be performed.

The present invention for solving the above-described problems is a planting device for scraping and mating a mat seedling placed on a seedling stand by a power of an engine, and planting the mat seedling by the planting device. Sometimes fertilizer is applied to the field with fertilizer stored in the fertilizer tank, and the remaining amount of fertilizer stored in the fertilizer tank or a seedling remaining amount detection sensor that detects a decrease in the remaining amount of mat seedling placed on the seedling stand A fertilizer remaining amount detection sensor for detecting a decrease, and alarm means for notifying an operator of a seedling outage or a fertilizer outage state based on a detection result of the seedling remaining amount detecting sensor or the fertilizer remaining amount detecting sensor, and a seating state of the operator In a riding-type rice transplanter in which a seating state detection sensor for detecting a car is installed in the driver's seat, the alarm means is in an operable state, and a seedling shortage detection sensor detects Engine speed control that automatically lowers the engine speed to the idling state when the fertilizer shortage is detected by the charge detection sensor and the non-sitting state of the operator on the driving seat is detected by the seating state detection sensor The first feature is that means are provided.
Also, by using the power of the engine, a planting device that scrapes the mat seedlings placed on the seedling platform and plants them in the field, and fertilizer that is stored in the fertilizer tank when the mats seedlings are planted by the planting device is applied to the field. A fertilizer application device, a seedling remaining amount detection sensor for detecting a decrease in the remaining amount of mat seedlings placed on a seedling mounting table, or a fertilizer remaining amount detection sensor for detecting a decrease in remaining amount of fertilizer stored in a fertilizer tank, and an operator In a riding type rice transplanter equipped with a parking brake for braking a traveling wheel, a seating state detection sensor for detecting the seating state of the vehicle is installed, and the parking brake is in operation, When it is detected that the seedling has been cut off or the remaining amount of fertilizer is detected by the sensor, and the non-sitting state of the operator in the driver's seat is detected by the seating state detection sensor, the engine And a second feature in that the rotational speed is provided an engine speed control means for automatically reduced to idle.
Then, by using the power of the engine, a planting device for scraping the mat seedling placed on the seedling platform and planting it on the field, and fertilizer stored in the fertilizer tank when the mat seedling is planted by the planting device is applied to the field. Fertilizer and a seedling remaining amount detection sensor for detecting a decrease in the remaining amount of mat seedling placed on a seedling stand, or a fertilizer remaining amount detection sensor for detecting a decrease in remaining amount of fertilizer stored in a fertilizer tank Based on the detection results of the remaining amount detection sensor and the remaining fertilizer detection sensor, an alarm means is provided for notifying the operator of the seedling out or fertilizer outage state, and a seating state detection sensor for detecting the operator's seating state is installed in the driver's seat In the riding type rice transplanter provided with a parking brake for braking the traveling wheel, the alarm means is operable and the parking brake is in operation, and the When the detection of cutting or the detection of remaining fertilizer is detected by the sensor for detecting the remaining amount of fertilizer, and when the non-sitting state of the operator in the driver's seat is detected by the sitting state detection sensor, the engine speed is automatically set to the idling state. A third feature is that engine speed control means for reducing the engine speed is provided.

According to the first aspect of the present invention, the alarm means for informing the operator of the seedling out or fertilizer running out state based on the detection result of the seedling remaining amount detecting sensor or the fertilizer remaining amount detecting sensor is operable, Automatic detection of engine speed to idling when the detection sensor detects the end of seedling or the amount of fertilizer is detected by the fertilizer detection sensor, and the non-sitting state of the operator in the driver's seat is detected by the seating state detection sensor. The engine speed control means for reducing the engine speed is provided so that the operator can use the driver's seat when he / she carries out the overloading by the self-propelled movement of the riding rice transplanter and the loading / unloading operation of the riding rice transplanter onto the loading platform of the transport vehicle. Since the engine does not stop automatically even if it rises for a predetermined time or more from the above, it is not necessary to restart the engine as in the prior art. At this time, the operator can perform the maneuvering operation while the operator stands up from the driver's seat or gets off the riding-type rice transplanter, so that the overpass and unloading operations can be performed safely and accurately, and the engine can be used during the operation. It is also possible to prevent the number of rotations of E from decreasing unexpectedly. In addition, seedling splicing and seedling replenishment work that accompanies a decrease in the remaining amount of mat seedlings placed on a seedling stand, or fertilizer replenishment work that accompanies a decrease in the remaining amount of fertilizer stored in the fertilizer tank are relatively frequent. At this time, even if the operator does not operate the throttle lever, the engine speed is quickly reduced to the idling state, so that unnecessary fuel consumption can be reduced.
According to the invention of claim 2, the parking brake that brakes the traveling wheel is in operation, the detection of the seedling outage by the seedling residual amount detection sensor or the detection of the fertilizer exhaustion by the fertilizer residual amount detection sensor, and By providing an engine speed control means for automatically reducing the engine speed to the idling state when the non-sitting state of the operator on the driver's seat is detected by the seating state detection sensor, the riding type rice transplanter is provided. For a relatively long period of time, i.e. seedling splicing or replenishment work due to a decrease in the remaining amount of mat seedlings placed on the seedling stage, or a decrease in the remaining amount of fertilizer stored in the fertilizer tank When performing the fertilizer replenishment work, the fact that the parking brake is in operation is a control condition that automatically reduces the engine speed to the idling state. Safety supplying operation of the seedling piecing and seedlings replenishing operation and the fertilizer is so performed.
Based on the detection result of the seedling remaining amount detection sensor or the fertilizer remaining amount detection sensor, the alarm means for informing the operator of the seedling outage or the fertilizer outage state is operable, and the parking brake for braking the traveling wheel is active. When the seedling remaining amount detection sensor detects that the seedling has run out or the fertilizer remaining amount detection sensor detects that the fertilizer has run out, and when the seating state detection sensor detects that the operator is not seated in the driver's seat, By providing an engine speed control means that automatically reduces the engine speed to the idling state, the riding type rice transplanter can move over the ridge by self-propelled movement and load and unload the riding type rice transplanter onto the carrier bed. When doing so, the engine will not stop automatically even if the operator stands up from the driver's seat for a predetermined time or longer. It is not necessary to restart the gin. At this time, it is possible to safely and accurately perform the above-mentioned overloading and unloading operations by operating the operator while standing from the driver's seat or when the operator gets off the riding type rice transplanter. Sometimes, it is possible to prevent the rotational speed of the engine E from dropping unexpectedly. In addition, seedling splicing and seedling replenishment work that accompanies a decrease in the remaining amount of mat seedlings placed on a seedling stand, or fertilizer replenishment work that accompanies a decrease in the remaining amount of fertilizer stored in the fertilizer tank are relatively frequent. At this time, even if the operator does not operate the throttle lever, the engine speed is quickly reduced to the idling state, so that unnecessary fuel consumption can be reduced. Then, the operation of the riding paddy transplanter is stopped for a relatively long period of time, and the seedling jointing and seedling replenishing work accompanying the decrease in the remaining amount of the mat seedling placed on the seedling placing table, or storing in the fertilizer tank When performing fertilizer replenishment work due to a decrease in the remaining amount of fertilizer, the fact that the parking brake is operating is a control condition that automatically reduces the engine speed to the idling state. Can perform splicing, seedling replenishment work and fertilizer replenishment work.

The side view of a riding type rice transplanter. The top view of a riding type rice transplanter. The side view which shows the linkage structure of the main transmission lever. The top view which shows a driving | operation control panel and its periphery. The side view and top view which show the linkage structure of a throttle lever and a speed control arm. The perspective view which shows the operation method of a quick up lever. The side view which shows the structure of a hydraulic-sensing control valve periphery. Side view around the fertilizer tank (partial perspective view). The side view which abbreviate | omitted one part which shows schematic structure of a fertilizer application apparatus. The block diagram of a control part (Example 1). The side view which shows the structure around a clutch and brake combined pedal. The flowchart which shows engine speed control (control example 1). The flowchart which shows engine speed control (control example 2). The flowchart which shows engine speed control (control example 3). The side view and top view which show the linkage structure of a throttle lever and a speed control arm. The block diagram of a control part (Example 2). The flowchart which shows engine speed control (control example 4). The flowchart which shows engine speed control (control example 5). The flowchart which shows engine speed control (control example 6).

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 and 2 are a side view and a plan view of a riding type rice transplanter to which the present invention is applied. The riding type rice transplanter 1 has a traveling machine body 4 supported by left and right front wheels 2 and a rear wheel 3. An engine E covered with a bonnet 5 is mounted on the front of the traveling machine body 4, and a steering wheel 6, a driving operation panel 7, a main transmission lever 8, and the like are provided behind the bonnet 5. Part 9;
From the side of the operation panel 7 to the rear part of the traveling machine body 4, a floor step 11 that forms the floor surface of the control unit 9, a machine body cover 13 that supports the driver's seat 12, and the like are provided. The airframe cover 13 is provided with flat seedling replenishing steps 13a and 13a formed one step higher than the floor step 11 on both the left and right sides behind the driver's seat 12, but these basic configurations are both conventional. Therefore, detailed description is omitted.

  A lifting link mechanism 14 including a hydraulic cylinder 14a serving as an actuator is provided behind the traveling machine body 4, and a planting portion 15 that is a work machine is connected to the lifting mechanism 15 through the lifting link mechanism 14 so as to freely move up and down. Yes. The planting unit 15 includes a seedling mounting table 16 that is provided so as to be inclined to the front and rear, and a plurality of planting devices 17 that scrape and plant seedlings from the seedling mounting table 16. A float 18 and the like for leveling the planted rice field are provided below.

  Further, paste or liquid fertilizer is applied to a fertilizer application device 71 (see FIG. 9), which will be described later in detail, on the front side of the traveling machine body 4, that is, on the side of the front step 19 provided on both the left and right sides of the bonnet 5. A pair of left and right fertilizer tanks 21, 21 for supply are mounted. In addition, side steps 22 and 22 are disposed behind both fertilizer tanks 21 and 21.

  As shown in FIG. 2, the side of the traveling body 4 in a plan view, that is, the side of the floor step 11 and the front step 19 described above, and the position A where the fertilizer tank 21 and the side step 22 overlap with each other are located at the traveling body. 4 is provided with a preliminary seedling mount 23 for transferring the preliminary seedling (mat seedling) from the front to the rear. The preliminary seedling stage 23 includes an intermediate preliminary seedling stage 23m mounted on the upper portions of the support members 25f and 25r extending from the traveling machine body 4 to the outside of the fertilizer tank 21 and rising. As shown in FIG. 1, each of the preliminary seedling platforms 23m, 23f, and 23r is formed in a substantially straight line with a front height, a rear height, and a low height when viewed from the side. It is possible to change the posture to the unfolded posture state and the retracted posture state in which the front and rear spare seedling platforms 23f and 23r are folded above the intermediate preliminary seedling platform 23m.

  When the preliminary seedling stage 23 is in the unfolded posture state as described above, the front side preliminary seedling stage 23f greatly protrudes from the front end of the traveling machine body 4, and the rear side preliminary seedling stage 23r is planted. It extends so as to extend over the flat seedling replenishment steps 13 a and 13 a of the machine body cover 13 located in the vicinity of the seedling mount 16 of the section 15.

  Further, on the left side of the driving operation panel 7 (in the vicinity of the steering wheel 6), as shown in FIGS. 1 and 3, a main transmission lever 8 which is a transmission operation tool is inserted through a lever guide 31, and this is provided. A transmission case 32 is disposed below the main transmission lever 8. A hydrostatic continuously variable transmission (HST) 33 is attached to the left side surface of the transmission case 32, and the traveling speed of the airframe is determined by the main speed change by the hydrostatic continuously variable transmission 33 and the transmission case 32. It is determined by sub-shifting by switching (sub-transmission mechanism) of the sub-transmission gear configured as described above. The main transmission lever 8 can be changed (swinged) while holding the grip 8a with the left hand.

  More specifically, a main transmission lever potentiometer 34 for detecting a shift operation position from the forward side to the reverse side of the main transmission lever 8 is provided at the base end portion of the main transmission lever 8. Based on the detection result of the shift operation position of the main transmission lever 8 by the potentiometer 34, an electric cylinder is connected to the operation arm 35 via a rod 36 in order to operate the operation arm 35 of the hydrostatic continuously variable transmission 33 in an interlocked manner. While connecting the rod side 37a of 37, the motor unit side 37b of the electric cylinder 37 is supported by the mounting member 38 of the lever guide 31 mentioned above. Reference numeral 36 c in the figure is a stroke sensor that detects the expansion / contraction stroke of the electric cylinder 37.

  Then, as shown in FIG. 4, the hydrostatic continuously variable transmission 33 is shifted by swinging the main transmission lever 8 back and forth and right and left along a guide groove 31 a formed in the lever guide 31. Be able to. That is, the main transmission lever 8 operates the operation arm 35 of the hydrostatic continuously variable transmission 33 forward by operating it forward from a neutral position N where the hydrostatic continuously variable transmission 33 is neutral. The forward speed is increased, and the main shift lever 8 is operated backward from the neutral position N, whereby the operating arm 35 of the hydrostatic continuously variable transmission 33 is operated backward to increase the reverse speed. Can be done.

  Therefore, the guide groove 31a formed in the lever guide 31 has a forward operation region F and a reverse operation region R of the guide groove 31a so that the forward movement and reverse operation of the machine body by the main transmission lever 8 do not become continuous operations. Both the operation areas F and R are connected by a neutral area N while being offset in the left-right direction. The main transmission lever 8 can be swung left and right along the guide groove 31a while keeping the hydrostatic continuously variable transmission 33 in the neutral state in the neutral region N.

  Further, on the right side of the operation panel 7, there are a sub-transmission lever 38 for switching the sub-transmission mechanism built in the transmission case 32, and an engine E arranged parallel to the outer side of the sub-transmission lever 38. A throttle lever 39 for adjusting the number of rotations protrudes from the guide grooves 41 a and 41 b formed in the lever guide 41.

  As shown in FIG. 5, the base end of the throttle lever 39 is screwed to the long side 42a of the boomerang-shaped turning arm 42 that swings in the front-rear direction around P1 as a fulcrum shaft below the operation panel 7. ing. On the other hand, between the short side 42b of the rotating arm 42 and the speed control arm 43 of the engine E, an engine control wire 44 that operates the speed control arm 43 in conjunction with the swinging operation of the throttle lever 39 is connected. Thus, the rotational speed of the engine E can be adjusted from a low speed to a high speed by swinging the throttle lever 39.

  Further, as shown in FIG. 6, the riding type rice transplanter 1 is capable of swinging up and down and back and forth so that the planting work machine 15 can be moved up and down and the planting clutch can be turned on and off. As an operating tool, a quick-up lever 46 that automatically returns to the original position (neutral position) when the hand is released in the vicinity (right side) of the steering wheel 6 is provided. The attachment work machine 15 is moved up and down, and a planting clutch (not shown) is turned on and off, and a swinging direction (operation start order) of left and right drawing markers (not shown) can be selected by operation in the front-rear direction.

  Then, as shown in FIG. 7, in the vicinity of the hydraulic control valve 48 that controls the expansion and contraction operation of the hydraulic cylinder 14a that raises and lowers the planting work machine 15, the above-described quick up lever 46 is operated upward or downward. A lifter cam motor 49 that is driven to rotate is disposed, and a pinion gear 51a fixed to the output shaft of the lifter cam motor 49 and a sector gear 52a formed on one side of the lifter cam 52 are engaged with each other and are not shown. The lifter cam 52 is provided with a first cam portion that engages with the engagement pin of the valve operation plate, and the lifter cam 52 rotates around the sleeve shaft 53 in a state where the first cam portion is engaged with the engagement pin of the valve operation plate. By configuring the lifter cam 52 to move, the lifter cam 52 is raised, fixed, and automatically (lowered) according to the rotational drive of the lifter cam motor 49. It is configured so as to be able to move control to the 4-position of the-planting. That is, the lifter cam 52 is turned to each position to control the hydraulic control valve 48 to be raised, fixed, and automatic, and the planting clutch is turned on and off by the quick up lever 46 when the hydraulic control valve 48 is lowered. Is possible.

  By the way, the riding type rice transplanter 1 uses a seedling remaining amount detection sensor 61 for detecting a decrease in the remaining amount of the mat seedling placed on the seedling placing table 16, that is, a mat seedling remaining state as shown in FIG. Corresponding to the number of planting strips of the type rice transplanter 1, it is provided at the lower part of the seedling mount 16. Further, a float type fertilizer remaining amount detection sensor 62 for detecting a decrease in the remaining amount of fertilizer (liquid fertilizer) stored in the fertilizer tank 21, that is, a fertilizer shortage is provided in the fertilizer tank 21.

  9 is a side view in which a part of the schematic configuration of the fertilizer application 71 is omitted, and a hose 64 that connects the lower portion of the pair of left and right fertilizer tanks 21 and 21 and the front end portion of the sub tank 63 is provided. The fertilizer tanks 21 and 21 are communicated with each other via the rear tank 63 and the rear end of the sub tank 63 is connected to the fixed displacement pump 65. Then, the fertilizer discharged from the fixed displacement pump 65 at a fixed capacity floats through the discharge hose 66, the switching operation portion 67 for stopping the fertilizer application and releasing the air, and the branch pipe 68 so that the fertilization depth can be adjusted. The fertilizer is applied to the field from the tip of the fertilizer nozzle 69 attached to the ferrule 18, and the fertilizer 71 is provided by the fixed displacement pump 65, the discharge hose 66, the switching operation portion 67, the branch pipe 68, the fertilizer nozzle 69, and the like. Is configured.

  The riding type rice transplanter 1 also uses an alarm buzzer (not shown) as alarm means for notifying the operator of the seedling out or fertilizer out status based on the detection results of the seedling remaining amount detection sensor 61 and the fertilizer remaining amount detection sensor 62 described above. In addition, a seedling replenishment monitor 72 a and a fertilizer remaining amount display monitor 72 b are provided on the driving operation panel 7, and a seating state detection sensor 73 for detecting the seating state of the operator is installed in the driver seat 12 (FIGS. 1 and 2). The seedling replenishment monitor 72a and the fertilizer remaining amount display monitor 72b are in an operable (displayable) state, and the seedling remaining amount detection sensor 61 detects the seedling outage or the fertilizer remaining amount detection sensor 62 detects the fertilizer outage. When the non-sitting state of the operator on the driver's seat 12 is detected by the sitting state detection sensor 73, the rotational speed of the engine E is idling. As engine speed control means for automatically reduced to, and a control unit (control device) 81, such as a block diagram shown in FIG. 10. The control unit 81 includes a microcomputer including a CPU, a ROM, a RAM, and the like. Various sensors and switches connected to the input side of the control unit 81 and an output device connected to the output side are described below. explain.

  On the input side of the control unit 81, an alarm preparation switch 82 for enabling the seedling replenishment monitor 72a and the fertilizer remaining amount display monitor 72b, which are alarm means, and the transmission case 32 of the riding type rice transplanter 1 are not shown. The main clutch is disengaged, and a clutch / brake combined pedal 84 that applies a parking (running stop) brake (not shown) provided in the rear axle case 83 is depressed, that is, an operation state of a parking brake that brakes the rear wheel 3 that is a running wheel. A brake detection switch 85 (see FIG. 11), a remaining amount detection sensor 61, a remaining fertilizer detection sensor 62, and a seating state detection sensor 73 are connected via a predetermined input interface circuit. The brake detection switch 85 may be provided by using a pedal lock L (see FIG. 11) that holds the depressed state of the clutch / brake pedal 84 in a fixed manner.

  On the other hand, on the output side of the control unit 81, detection of the seedling shortage by the seedling residual amount detection sensor 61 or the detection of the fertilizer shortage by the fertilizer residual amount detection sensor 62 is performed, and the seating state detection sensor 73 is detected. When the non-sitting state of the operator on the driver's seat 12 is detected, the short side 42b facing the long side 42a of the rotating arm 42 in which the base end portion of the throttle lever 39 is screwed is pressed, Based on the detection results of the electric cylinder 86, the seedling remaining amount detection sensor 61, and the fertilizer remaining amount detection sensor 62 that automatically (forcefully) swings the throttle lever 39 to the low rotation side, the operator determines whether the seedling has run out or the fertilizer has run out. A seedling replenishment monitor 72a and a fertilizer remaining amount display monitor 72b, which are alarm means for informing the user, are connected via a predetermined output interface circuit.

  Next, engine speed control by the control unit 81 described above will be described based on the flowcharts of FIGS.

  First, in the flowchart shown in FIG. 12 (control example 1), the alarm preparation switch 82 that enables the seedling replenishment monitor 72a and the fertilizer remaining amount display monitor 72b, which are alarm means, is in an on state, and the seedling remaining amount is shown. The rotation of the engine E is detected when the detection sensor 61 detects the end of seedling or the remaining amount of fertilizer is detected by the sensor 62, and the non-seating state of the operator on the driver's seat 12 is detected by the seating state detection sensor 73. A control unit 81 as an engine speed control means for forcibly swinging the throttle lever 39 to the low speed side via the electric cylinder 86 so as to automatically reduce the speed to an idling state (predetermined speed). In this control mode, overriding by the self-propelled movement of the riding type rice transplanter 1 and loading / unloading of the riding type rice transplanter 1 onto the loading platform of the transport vehicle When working, since no operator is automatically engine E also rises more than a predetermined time from the driver's seat 12 to stop, it is not necessary to restart the engine E as in the prior art. At this time, the operator can safely and accurately carry out the overloading and unloading operations by operating the operator while standing up from the driver's seat 12 or when the operator gets off the riding type rice transplanter 1. It is also possible to prevent the engine E from rotating unexpectedly during the work. Moreover, the seedling jointing and seedling replenishment work accompanying the decrease in the remaining amount of the mat seedling placed on the seedling mount 16 or the replenishment work of fertilizer accompanying the decrease in the remaining amount of the fertilizer stored in the fertilizer tank 21 is relatively Although it must be performed frequently, even if the operator does not operate the throttle lever 39, the rotational speed of the engine E quickly decreases to the idling state, so that unnecessary fuel consumption can be reduced.

  Further, the flowchart (control example 2) shown in FIG. 13 shows that a parking brake that brakes the rear wheel 3 that is a running wheel is in operation, and that the seedling remaining amount detection sensor 61 detects the seedling breakage or the fertilizer remaining amount detection sensor. When the fertilizer runout is detected by 62 and the non-sitting state of the operator on the driver's seat 12 is detected by the seating state detection sensor 73, the rotation speed of the engine E is automatically set to the idling state (predetermined rotation speed). A control unit 81 is provided as an engine speed control means for forcibly swinging the throttle lever 39 to the low rotation side via the electric cylinder 86 so as to decrease. Work that is performed by stopping the traveling of the rice transplanter 1 for a relatively long time, that is, seedling splicing or seedling replenishment work due to a decrease in the remaining amount of mat seedlings placed on the seedling placing table 16, or fertilizer When performing the replenishment work of the fertilizer accompanying the decrease in the remaining amount of the fertilizer stored in the tank 21, the fact that the parking brake is operating is set as a control condition for automatically reducing the rotational speed of the engine E to the idling state. Therefore, the seedling joining, seedling replenishing work and fertilizer replenishing work can be performed more safely.

  The flowchart (control example 3) shown in FIG. 14 is after the alarm preparation switch 82 for enabling the seedling replenishment monitor 72a, the fertilizer remaining amount display monitor 72b, etc., which are alarm means, is turned on and is a traveling wheel. The parking brake that brakes the wheel 3 is operating, and the seedling remaining amount detection sensor 61 detects the seedling shortage or the fertilizer remaining amount detection sensor 62 detects the fertilizer shortage, and the seating state detection sensor 73 detects the driving seat. When the non-sitting state of the operator to 12 is detected, the throttle lever 39 is forcibly set via the electric cylinder 86 so as to automatically reduce the rotational speed of the engine E to the idling state (predetermined rotational speed). A control unit 81 is provided as an engine speed control means for swinging to the low rotation side. In this control mode, the riding type rice transplanter 1 is controlled automatically. Since the engine E does not automatically stop even if the operator stands up from the driver seat 12 for a predetermined time or more when carrying out the work of moving over the anchorage or unloading the riding type rice transplanter 1 on the platform of the transport vehicle, Thus, the engine E need not be restarted. At this time, the operator can safely and accurately carry out the overloading and unloading operations by operating the operator while standing up from the driver's seat 12 or when the operator gets off the riding type rice transplanter 1. It is also possible to prevent the engine E from rotating unexpectedly during the work. Moreover, the seedling jointing and seedling replenishment work accompanying the decrease in the remaining amount of the mat seedling placed on the seedling mount 16 or the replenishment work of fertilizer accompanying the decrease in the remaining amount of the fertilizer stored in the fertilizer tank 21 is relatively Although it must be performed frequently, even if the operator does not operate the throttle lever 39, the rotational speed of the engine E quickly decreases to the idling state, so that unnecessary fuel consumption can be reduced. Then, seedling splicing and seedling replenishing work accompanying a decrease in the remaining amount of mat seedlings placed on the seedling placing table 16 which is a work performed by stopping the traveling of the riding paddy transplanter 1 for a relatively long time, or a fertilizer tank 21. When performing the replenishment work of fertilizer accompanying the decrease in the remaining amount of fertilizer stored inside, the fact that the parking brake is in operation is a control condition for automatically reducing the engine E to the idling state. More safely seedling, seedling replenishment work and fertilizer replenishment work can be performed.

  The above-described electric cylinder 86 is contracted immediately after the throttle lever 39 is swung to the low rotation side by the extension operation, so that after the engine E is automatically reduced to the idling state, A desired engine speed can be set by an artificial operation of the throttle lever 39. In this case, since the rotation speed of the engine E is maintained in the idling state even after the seedling joining, seedling replenishing work or fertilizer replenishing work is completed, an unexpected sudden start or the like can be prevented.

  As shown in FIG. 15, the throttle lever 39 according to the second embodiment is pivotally supported by P1 as a fulcrum shaft below the operation panel 7 so as to be able to swing back and forth. In order to detect the adjustment position of the range, a throttle lever potentiometer 91 is provided at the base end thereof, and the engine control wire 92 is based on the detection result of the engine speed adjustment position of the throttle lever 39 by the throttle lever potentiometer 91. A throttle motor (electric motor) 93 is disposed below the base end of the throttle lever 39 and a pinion gear 93a fixed to the output shaft of the throttle motor 93 is provided to operate the speed control arm 43 of the engine E via Sector gear 94 that meshes with the While connecting the one end of the engine control wire 92 on one side of the Tagiya 94, it is linked to a tip end portion of the engine control and the other end of the governor arm 43 of the wire 92. Reference numeral 95 in the figure denotes a throttle potentiometer that detects the rotation angle of the sector gear 94 instead of the rotation angle of the speed control arm 43.

  FIG. 16 is a block diagram of a control unit (control device) 81 according to the second embodiment. On the input side of the control unit 81, the rotational speed of the engine E is interlocked with an adjustment (setting) position by the throttle lever 39. A mode changeover switch (FIG. 4) for switching to the low-rotation control mode in which the engine speed is automatically reduced to the idling state regardless of the adjustment (setting) position by the throttle lever 39 under the normal control mode and predetermined control conditions. (Reference) 90, the alarm preparation switch 82 for enabling the seedling replenishment monitor 72a and the fertilizer remaining amount display monitor 72b, which are alarm means, and the main clutch (not shown) provided in the transmission case 32 of the riding rice transplanter 1 are disconnected. In addition, a clutch (running stop) brake (not shown) provided in the rear axle case 83 is operated. A brake detection switch 85 (see FIG. 11), a seedling remaining amount detection sensor 61, and a fertilizer remaining amount detection that detect the depression state of the brake / brake combined pedal 84, that is, the operation state of the parking brake that brakes the rear wheel 3 that is the traveling wheel. A sensor 62, a seating state detection sensor 73, a throttle lever potentiometer 91, and a throttle potentiometer 95 are connected via a predetermined input interface circuit.

  On the other hand, on the output side of the control unit 81, detection of the seedling shortage by the seedling residual amount detection sensor 61 or the detection of the fertilizer shortage by the fertilizer residual amount detection sensor 62 is performed, and the seating state detection sensor 73 is detected. When a non-sitting state of the operator on the driving seat 12 is detected, a sector gear 94 meshed with a pinion gear 93a fixed to the output shaft of the throttle motor 93, and a speed control arm of the engine E via the engine control wire 92 Based on the detection result of the throttle motor 93 that automatically (forcefully) swings 43 to the low-rotation side and the remaining amount detection sensor 61 and the remaining fertilizer detection sensor 62, the operator can determine whether the seedling has run out or the fertilizer has run out. The seedling replenishment monitor 72a and the fertilizer remaining amount display monitor 72b, which are alarm means for informing the user, are connected via a predetermined output interface circuit. To have.

  Next, the engine speed control by the control unit 81 described above will be described based on the flowcharts of FIGS.

  First, in the flowchart (control example 4) shown in FIG. 17, when the normal (control) mode is selected by the mode switch 90, the engine speed control corresponding to the adjustment (setting) position of the throttle lever 39 is performed. Is executed. On the other hand, when the low-speed (control) mode is selected with the mode changeover switch 90, the alarm preparation switch 82 for turning on the seedling replenishment monitor 72a, the fertilizer remaining amount display monitor 72b, etc., which are alarm means, is turned on. Then, the detection of the lack of seedling by the remaining amount detection sensor 61 or the detection of the absence of fertilizer by the remaining fertilizer detection sensor 62 is detected, and the non-sitting state of the operator on the driver's seat 12 is detected by the sitting state detection sensor 73. A sector gear 94 meshing with a pinion gear 93a fixed to the output shaft of the throttle motor 93, and an engine control wire 92 so that the rotational speed of the engine E is automatically lowered to an idling state (predetermined rotational speed). Engine speed control means for automatically (forcibly) swinging the speed control arm 43 of the engine E to the low rotation side via the In this control mode, when the riding-type rice transplanter 1 is moved over the ridge by the self-propelled movement and the loading-type rice transplanter 1 is loaded onto the loading platform of the transporting vehicle. Since the engine E does not automatically stop even if the operator stands up from the driver's seat 12 for a predetermined time or more, it is not necessary to restart the engine E as in the conventional case. At this time, the operator can safely and accurately carry out the overloading and unloading operations by operating the operator while standing up from the driver's seat 12 or when the operator gets off the riding type rice transplanter 1. It is also possible to prevent the engine E from rotating unexpectedly during the work. Moreover, the seedling jointing and seedling replenishment work accompanying the decrease in the remaining amount of the mat seedling placed on the seedling mount 16 or the replenishment work of fertilizer accompanying the decrease in the remaining amount of the fertilizer stored in the fertilizer tank 21 is relatively Although it must be performed frequently, even if the operator does not operate the throttle lever 39, the rotational speed of the engine E quickly decreases to the idling state, so that unnecessary fuel consumption can be reduced.

  Further, in the flowchart (control example 5) shown in FIG. 18, when the normal (control) mode is selected with the mode switch 90, the engine speed control corresponding to the adjustment (setting) position of the throttle lever 39 is performed. Is executed. On the other hand, when the low rotation (control) mode is selected by the mode changeover switch 90, the parking brake for braking the rear wheel 3 that is the traveling wheel is in operation, When the detection of fertilizer shortage is detected by the detection or fertilizer remaining amount detection sensor 62 and the non-sitting state of the operator on the driver's seat 12 is detected by the seating state detection sensor 73, the rotational speed of the engine E is set to the idling state (predetermined The speed control arm 43 of the engine E is automatically (via a sector gear 94 meshed with a pinion gear 93a fixed to the output shaft of the throttle motor 93 and the engine control wire 92) The control unit 81 is provided as an engine speed control means for forcibly swinging to the low speed side. Work that is performed by stopping the traveling of the pattern transplanter 1 for a relatively long time, that is, seedling splicing or replenishing work that accompanies a decrease in the remaining amount of mat seedlings placed on the seedling placing table 16, or storage in the fertilizer tank 21 When the fertilizer supply work accompanying the decrease in the remaining amount of fertilizer is performed, the fact that the parking brake is operating is a control condition that automatically reduces the engine E speed to the idling state, so it is safer The seedling joining, seedling replenishing work and fertilizer replenishing work can be performed.

  In the flowchart (control example 6) shown in FIG. 19, when the normal (control) mode is selected with the mode changeover switch 90, the engine speed control corresponding to the adjustment (setting) position of the throttle lever 39 is performed. Is executed. On the other hand, when the low-speed (control) mode is selected with the mode changeover switch 90, the alarm preparation switch 82 for turning on the seedling replenishment monitor 72a, the fertilizer remaining amount display monitor 72b, etc., which are alarm means, is turned on. In addition, the parking brake that brakes the rear wheel 3 that is the traveling wheel is in operation, the seedling remaining amount detection sensor 61 detects the seedling outage or the fertilizer remaining amount detection sensor 62 detects the fertilizer outage, and the seating When the state detection sensor 73 detects the non-sitting state of the operator on the driver's seat 12, the output shaft of the throttle motor 93 is automatically reduced so that the rotational speed of the engine E is automatically lowered to the idling state (predetermined rotational speed). A sector gear 94 that meshes with a pinion gear 93 a fixed to the motor and a speed control arm 43 of the engine E via an engine control wire 92. A control unit 81 is provided as an engine speed control means for dynamically (forcibly) swinging to a low speed side. In this control mode, the self-propelled movement of the riding rice transplanter 1 When loading and unloading the riding type rice transplanter 1 onto the loading platform of the transport vehicle, the engine E does not stop automatically even if the operator stands up from the driver seat 12 for a predetermined time or more. Does not have to be restarted. At this time, the operator can safely and accurately carry out the overloading and unloading operations by operating the operator while standing up from the driver's seat 12 or when the operator gets off the riding type rice transplanter 1. It is also possible to prevent the engine E from rotating unexpectedly during the work. Moreover, the seedling jointing and seedling replenishment work accompanying the decrease in the remaining amount of the mat seedling placed on the seedling mount 16 or the replenishment work of fertilizer accompanying the decrease in the remaining amount of the fertilizer stored in the fertilizer tank 21 is relatively Although it must be performed frequently, even if the operator does not operate the throttle lever 39, the rotational speed of the engine E quickly decreases to the idling state, so that unnecessary fuel consumption can be reduced. Then, seedling splicing and seedling replenishing work accompanying a decrease in the remaining amount of mat seedlings placed on the seedling placing table 16 which is a work performed by stopping the traveling of the riding paddy transplanter 1 for a relatively long time, or a fertilizer tank 21. When performing the replenishment work of fertilizer accompanying the decrease in the remaining amount of fertilizer stored inside, the fact that the parking brake is in operation is a control condition for automatically reducing the engine E to the idling state. More safely seedling, seedling replenishment work and fertilizer replenishment work can be performed.

  In the control examples 4 to 6 described above, the state in which the seedling remaining amount detection sensor 61 detects no seedling outage or the fertilizer remaining amount detection sensor 62 no longer detects fertilizer outage, that is, seedling joining, seedling replenishment work, or fertilizer. In the state where the replenishment operation is completed, or the operator is seated on the driver's seat 12, the engine E is set to return to the adjustment (setting) position by the throttle lever 39. When starting, it is not necessary to operate the throttle lever 39 so that the engine speed is the same as before the seedling joining, seedling replenishing work, or fertilizer replenishing work. In Example 1 (Control Examples 1 to 3) and Example 2 (Control Examples 4 to 6), whether or not the fertilizer tank 21 is being replenished is determined by the operation by the seating state detection sensor 73. Although it was judged by detecting the non-sitting state of the operator on the seat 12 and detecting the fertilizer running out by the fertilizer remaining amount detection sensor 62, the lid 21a (see FIG. 8) covering the fertilizer supply port provided in the fertilizer tank 21 It can also be determined by detecting the open / closed state.

3 Traveling wheels (rear wheels)
DESCRIPTION OF SYMBOLS 12 Driver's seat 16 Seedling stand 17 Planting device 21 Fertilizer tank 61 Seedling residual amount detection sensor 62 Fertilizer residual amount detection sensor 71 Fertilizer 72a Alarm means (Seedling supply monitor)
72b Warning means (fertilizer remaining amount display monitor)
73 Seating state detection sensor 81 Engine speed control means (control unit)
E engine

Claims (3)

  By using the power of the engine (E), the mat seedling placed on the seedling mount (16) is scraped off and planted in the field, and the fertilizer is used when the mat seedling is planted by the planting device (17). A fertilizer application device (71) for fertilizing the fertilizer stored in the tank (21) on the field, and a seedling remaining amount detection sensor (61) for detecting a decrease in the remaining amount of the mat seedling placed on the seedling placing stand (16) or Based on the detection result of the fertilizer residual amount detection sensor (62) for detecting a decrease in the residual amount of the fertilizer stored in the fertilizer tank (21), and the detection result of the seedling residual amount detection sensor (61) or the fertilizer residual amount detection sensor (62). A riding type comprising alarm means (72a, 72b) for notifying the operator of the seedling out or fertilizer running state, and a seating state detection sensor (73) for detecting the seating state of the operator installed in the driver seat (12). On rice transplanter The alarm means (72a, 72b) is in an operable state, the detection of the seedling outage by the seedling residual amount detection sensor (61) or the detection of the fertilizer exhaustion by the fertilizer residual amount detection sensor (62) is made, and seating An engine speed control means (81) for automatically reducing the engine speed of the engine (E) to the idling state when the state detection sensor (73) detects that the operator is not seated on the driver seat (12); Riding type rice transplanter characterized by being provided.   The planting device (17) for scraping the mat seedling placed on the seedling placing stand (16) by the power of the engine (E) and planting it in the field, and the fertilizer when the mat seedling is planted by the planting device (17) A fertilizer application device (71) for fertilizing the fertilizer stored in the tank (21) on the field, and a seedling remaining amount detection sensor (61) for detecting a decrease in the remaining amount of the mat seedling placed on the seedling placing stand (16) or A remaining fertilizer detection sensor (62) that detects a decrease in the remaining amount of fertilizer stored in the fertilizer tank (21) and a sitting state detection sensor (73) that detects the sitting state of the operator are installed in the driver seat (12). In addition, in the riding type rice transplanter provided with a parking brake for braking the traveling wheel (3), the parking brake is in operation, and the seedling remaining amount detection sensor (61) detects the seedling breakage or the fertilizer remaining amount detection sensor. According to (62) When the out-of-charge is detected and the non-sitting state of the operator on the driver's seat (12) is detected by the seating state detection sensor (73), the engine (E) is automatically reduced to the idling state. Riding type rice transplanter characterized in that an engine speed control means (81) is provided.   The planting device (17) for scraping the mat seedling placed on the seedling placing stand (16) by the power of the engine (E) and planting it in the field, and the fertilizer when the mat seedling is planted by the planting device (17) A fertilizer application device (71) for fertilizing the fertilizer stored in the tank (21) on the field, and a seedling remaining amount detection sensor (61) for detecting a decrease in the remaining amount of the mat seedling placed on the seedling placing stand (16) or Based on the detection result of the fertilizer residual amount detection sensor (62) for detecting a decrease in the residual amount of the fertilizer stored in the fertilizer tank (21), and the detection result of the seedling residual amount detection sensor (61) or the fertilizer residual amount detection sensor (62). Alarm means (72a, 72b) for notifying the operator of the seedling out condition or the fertilizer running out condition, and a seating state detection sensor (73) for detecting the operator's seating state is installed in the driving seat (12) and the traveling wheel ( 3) In a riding type rice transplanter equipped with a parking brake, the alarm means (72a, 72b) is in an operable state and the parking brake is in operation, and the seedling remaining amount detection sensor (61) detects the lack of seedling or the remaining fertilizer When it is detected that the fertilizer has run out by the amount detection sensor (62) and the non-sitting state of the operator on the driver seat (12) is detected by the seating state detection sensor (73), the rotational speed of the engine (E) is set. A riding-type rice transplanter characterized in that an engine speed control means (81) for automatically reducing the engine to an idling state is provided.

Images