JP2013070678A - Service vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a service vehicle having a fertilizing device of performing proper fertilization with neither an excess nor poor amount of a fertilizer and depending on the firm field, and capable of evening the fertilizer concentration all over the firm field.SOLUTION: The service vehicle equipped with a seedling planting device 4 is configured to include: an adjusting motor 6 for driving a fertilization amount baffle 41 to adjust the fertilization amount; a rotation shaft 7 rotated by the adjusting motor 6; an indication needle 9 moving in the axial direction by rotation of the rotation shaft 7; a stroke sensor 14 detecting the moving amount of the indication needle 9; a fertilizer concentration sensor 71 detecting the fertilizer concentration in the soil while travelling; a standard fertilization amount calculating part calculating the standard fertilization amount based on the detected value detected with the sensor 71; and an adjustment fertilization amount calculating part calculating the adjustment fertilization amount of the baffle 41 based on the detected value detected with the stroke sensor 14. The vehicle further includes a fertilizing device 5 having a control device 72 driving the adjusting motor 6 to correspond the fertilizing amount calculated by the adjustment fertilization amount calculating part to the fertilization amount calculated by the standard fertilization amount calculating part and, when the fertilization amounts of the both calculating parts are corresponded, stopping the adjusting motor 6.

Description

  The present invention relates to a work vehicle equipped with a fertilizer device that detects fertilizer concentration on a soil surface while traveling in a field and applies and controls the fertilizer amount corresponding to the fertilizer concentration.

A technique for calculating fertility from soil characteristics such as soil mud depth, hardness, and electrical conductivity, and further calculating the amount of fertilization based on this fertility and applying an appropriate amount of fertilizer (for example, Patent Document 1) is known.
By doing in this way, the soil characteristic of a paddy field can be made uniform, and an efficient agricultural work can be performed by planting a seedling simultaneously with the measurement of a soil characteristic.

  In addition, a technique (for example, see Patent Document 2 below) is known in which an adjustment shaft of a fertilization amount adjusting mechanism is configured to be rotatable by an electric motor capable of rotating forward and reverse, and the fertilization amount is changed in response to a change in traveling speed. Yes.

JP 2010-19 Japanese Patent No. 3641102

  According to the said patent document 1, fertilizer is fertilized to a paddy field by detecting and calculating fertilizer application quantity by a soil characteristic, and controlling a fertilizer means according to this calculated fertilizer application quantity. Specifically, a predetermined amount of fertilizer corresponding to the calculated fertilizer application amount is sent downward from a tank containing fertilizer and sprayed by a nozzle. As the feeding means, a feeding roll is usually used, and the fertilizer feeding amount is controlled by electric control of a rotating feeding motor. In this case, it is difficult to maintain an accurate fertilizer application amount, and error variation in fertilizer application control tends to increase. Therefore, the fertilizer concentration of the whole field cannot be made uniform, and there is a problem that an excessive amount of fertilizer or a shortage of fertilizer occurs, resulting in poor growth of seedlings.

For example, Patent Document 2 discloses a configuration in which the operating speed of the feeding roll is changed by controlling the electric motor so that the fertilizing amount is changed in conjunction with the shift of the running speed.
In this case, if the rotation speed of the feeding motor is slow, the time lag until the fertilizer application is changed to the fertilizer application corresponding to the detected running speed will increase, so the fertilizer application will be more than necessary, and the seedling will grow poorly due to excessive fertilizer And a problem that the harvesting operation using a harvesting machine such as a combiner becomes difficult due to the tendency to fall down due to strong winds.
On the other hand, there is also a problem that the required amount of fertilizer is not supplied, and the seedlings become poorly grown due to the lack of fertilizer, resulting in a decrease in crop quality and yield.

  Moreover, when the rotational speed of the feeding motor is fast, the fertilizer applied to the fertilizer is shaken by the vibration from the feeding motor, thereby increasing or decreasing the amount of fertilizer released from the tank (storage hopper) or the feeding roll. Therefore, in this case also, it is not possible to supply an appropriate fertilizer.

When determining the operation amount of the feeding motor with respect to increase / decrease of the traveling speed, it is necessary to determine how many rotations to rotate forward or backward from the current rotational position of the motor. For this reason, other sensors must be arranged in a complicated manner, and the control processing of the control device is also complicated, so that the airframe configuration itself is complicated, causing a problem of deterioration in maintainability, and high cost. Invite
In order to finely control the rotation speed of the feeding motor, a high-performance motor that can be finely stopped is required, and the control device needs to send a stop signal in units of 1 mm. It will decline.

  The object of the present invention is to perform an appropriate fertilization according to the field without causing excessive fertilizer and lack of fertilizer, and work with a fertilizer having a simple configuration that can make the fertilizer concentration uniform throughout the field. Is to provide a vehicle.

The above-mentioned subject is achieved by adopting the following configuration.
According to the first aspect of the present invention, the working device (4) is provided at the rear part of the vehicle body frame (2) including the traveling wheels (10, 11), and the fertilizer is stored above the vehicle body frame (2). The feeding part (13) provided below the part (60) and the storing part (60) and feeding the fertilizer supplied from the storing part (60) and the feeding part (13) are supplied from the storing part (60). In a work vehicle provided with a fertilizer application device (5) for supplying a fertilizer to a farm field, the fertilizer application device (5) includes the fertilizer application amount adjuster (41). An adjustment actuator (6) for adjusting the fertilization amount by driving the rotation shaft (7), a rotation shaft (7) rotated by driving the adjustment actuator (6), and a rotation shaft (7) provided on the rotation shaft (7). A moving member (9) that moves in the axial direction by rotation; A moving amount detecting means (14) for detecting the moving amount of the moving member (9), a fertilizer concentration detecting means (71) for detecting the fertilizer concentration in the soil while running fertilizer, and the fertilizer concentration detecting means (71) A reference fertilization amount calculation unit that calculates a reference fertilization amount based on the detected fertilizer concentration, and the fertilization amount adjustment unit (based on the movement amount of the moving member (9) detected by the movement amount detection means (14)) 41), and a fertilizer amount calculated by the adjusted fertilizer amount calculator matches the fertilizer amount calculated by the reference fertilizer amount calculator. When the adjustment actuator (6) is driven and the fertilization amount calculated by the reference fertilization amount calculation unit matches the fertilization amount calculated by the adjustment fertilization amount calculation unit, the control actuator (6) is stopped. It is a work vehicle equipped with a device (72).

  According to a second aspect of the present invention, an actuator cover (103) for housing the adjustment actuator (6) is provided above the rear portion of the vehicle body frame (2), and the actuator cover (103) is disposed between the vehicle body frame (2). The work vehicle according to claim 1, wherein an elastic member (101) for shock absorption is provided on the work vehicle.

  According to a third aspect of the present invention, an actuator cover (103) that houses the adjustment actuator (6) is provided in the vicinity of the storage section (60), and the actuator cover (103) is disposed between the storage section (60). The work vehicle according to claim 1 or 2, further comprising a shock absorbing elastic member (107).

  According to a fourth aspect of the present invention, the rotary shaft (7) is a helical shaft (7), and the end of the rotary shaft (7) is in the vicinity of the reservoir (60) and opposite to the actuator (6). A balance weight (111) movable in the front-rear direction along the spiral of the rotating shaft (7) is provided in the portion, and an elastic member for absorbing shock is provided between the balance weight (111) and the storage portion (60). (108) is provided, The work vehicle according to any one of claims 1 to 3.

  According to a fifth aspect of the present invention, the traveling wheels (10, 11) include left and right front wheels (10, 10) and left and right rear wheels (11, 11), and the fertilizer concentration detection means (71) It is an electrode plate (71) provided inside the front wheels (10, 10), and the reference fertilizer amount calculation unit of the control device (72) calculates the fertilizer amount based on the energization amount detected by the electrode plate (71). It is a structure, It is a work vehicle of any one of Claim 1 to 4.

  According to a sixth aspect of the present invention, the storage portion (60) is composed of a hopper (60) having a longitudinal direction in the horizontal direction, and the rotary drive shaft (115) passing through the inclined portion (60b) below the hopper (60). ) Is provided along the longitudinal direction, and a stirring member (117) is provided on the outer peripheral surface of the rotary drive shaft (115) to rotate with the rotary drive shaft (115) and stir the fertilizer in the inclined portion (60b). The work vehicle according to any one of claims 1 to 5, wherein a drive actuator (119) of the rotary drive shaft (115) is provided outside a hopper (60) side wall.

  According to invention of Claim 1, since the fertilizer supply amount of a fertilizer application apparatus (5) is automatically adjusted according to the fertilizer density | concentration of a farm field, the fertilizer density | concentration of the whole farm field can be made uniform. Therefore, the crop grows uniformly throughout the field, making it easier to determine when to perform weeding, insect repellent, etc., and to perform the harvesting operation efficiently.

  Further, when the amount of fertilization is changed by detecting the amount of fertilization of the fertilizer amount adjustment unit (41) by the amount of movement detection means (14) as the amount of movement (operation stop position) of the moving member (9), Even if the amount of operation is, the change can be captured and adjusted by the adjustment actuator (6), so that it is easy to cope with a small amount of change. Therefore, a more appropriate amount of fertilization can be performed with a simple configuration, the fertilizer concentration in the field can be made uniform and the fertilization accuracy can be improved, and the growth of the crop can be stabilized and the quality can be improved.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, an elastic member (between the actuator cover (103) of the adjustment actuator (6) and the vehicle body frame (2) ( 101) can absorb the vibration generated when the adjusting actuator (6) continuously operates at a high speed, so that the amount of fertilizer released from the reservoir (60) and the feeding member (13) accompanying the vibration of the adjusting actuator (6). Is prevented, and an appropriate amount of fertilizer is supplied.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, the actuator cover (103) of the adjustment actuator (6) and the side wall (60a) of the storage part (60) Since the expansion and contraction member (107) provided between them can absorb vibration generated when the adjustment actuator (6) continuously operates at a high speed, the storage part (60) and the payout accompanying the vibration of the adjustment actuator (6) can be absorbed. The amount of fertilizer discharged from the member (13) is prevented from being disturbed, and an appropriate amount of fertilizer is supplied.

  Moreover, when an expansion / contraction member is provided at the rear part of the vehicle body frame (2), the operator may interfere with the work of supplying fertilizer, chemicals, seedlings, and the like to the fertilizer application device (5) and the work device (4). However, the space can be effectively used by devising the position of the elastic member (107) in this way, and the rear part of the vehicle body frame (2) can be opened, so that an operator can easily work on the vehicle body frame (2). As a result, work efficiency is also improved.

  According to the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, the rotation shaft (7) opposite to the adjustment actuator (6) is provided at the end. Even if the adjusting actuator (6) is operated at a high speed when increasing or decreasing the fertilization amount by providing the balance weight (111) movable along the spiral of the rotating shaft (7), the balance weight (111) The occurrence of vibration can be prevented with the weight of. Therefore, the amount of fertilizer discharged from the storage section (60) and the feeding member (13) accompanying the vibration of the adjustment actuator (6) is prevented from being disturbed, and an appropriate amount of fertilizer is supplied.

  Further, if the balance weight (111) can be moved manually, the effect of the balance weight (111) can be easily changed, so that the occurrence of vibration can be reliably prevented and the fertilizer can be supplied more appropriately. it can. Furthermore, the expansion / contraction member (108) provided between the balance weight (111) and the storage part (60) further increases the storage part (60) and the feeding member (13) associated with the vibration of the adjustment actuator (6). The amount of fertilizer released is prevented from being disturbed, and an appropriate amount of fertilizer is supplied.

  According to the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, the electrode plate (71) which is a fertilizer concentration detecting means is always in contact with the field, It is possible to prevent the detection of fertilizer concentration from being missed. Therefore, the change of the fertilizer supply amount according to the fertilizer concentration in the field can be calculated with high accuracy.

  According to the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, the stirrer member 117 accumulates in the inclined portion (60b) of the hopper (60). Since the fertilizer can be stirred, the amount of the fertilizer supplied to the feeding member (13) is kept constant. Therefore, the supply amount of fertilizer is stabilized and the growth of the crop is improved.

  In addition, when the fertilizer accumulates in the hopper (60) and hardens to form a layer, a situation in which no fertilizer is applied occurs despite the presence of the fertilizer in the hopper (60). However, by providing the stirring member (117), this can be prevented, and it is also possible to prevent the crop from causing poor growth due to insufficient fertilizer without fertilization.

  Furthermore, by placing the drive actuator (119) of the rotary drive shaft (115) outside the side wall of the hopper (60), fertilizer, chemicals, seedlings, etc. can be placed on the hopper (60). Work can be performed near the section (60). Therefore, work efficiency is improved.

It is a side view of the seedling transplanter of one embodiment of the present invention. It is a top view of the seedling transplanting machine of FIG. It is a front view of the front wheel part of the seedling transplanting machine of FIG. It is a side view of the front part of the seedling transplanter of FIG. It is a right view of the fertilizer application of the seedling transplanter of FIG. It is the left view which showed the action | operation mechanism of the fertilizer application of the seedling transplanter of FIG. It is a block diagram of the control apparatus of the seedling transplanter of FIG. It is a front sectional view of the axle housing part of the seedling transplanter of FIG. FIG. 9A is a side view of the slip ring portion of the axle housing portion of the seedling transplanter of FIG. 1, and FIG. 9B is a side view of the slip ring portion of another embodiment. It is a side view of another Example of a stroke sensor part. It is a top view of the stroke sensor part of FIG. FIG. 12A is a front sectional view showing another embodiment of the front wheel portion, and FIG. 12B is a side view of FIG. It is a side view of another Example of a fertilizer application apparatus. It is a side view of another Example of a fertilizer application apparatus. It is a side view of another Example of a fertilizer application apparatus. Fig.16 (a) is a rear view of the hopper part of the fertilizer application of the seedling transplanter of FIG.1, FIG.16 (b) is a top view of Fig.16 (a). It is the figure which showed the cross-sectional shape of the stirring blade provided in a hopper. 18 (a) is a rear view of another embodiment of the hopper portion of the fertilizer application, FIG. 18 (b) is a plan view of FIG. 18 (a), and FIG. 18 (c) is FIG. It is a side view of a). It is a rear view of another Example of the hopper part of a fertilizer applicator.

  The embodiment will be described based on the drawings. In the present embodiment, a seedling transplanter connected with a seedling planting device 4 as a working device will be described, but a tilling device, a seeding device, a weeding machine (a machine for processing weeds during cultivation of paddy rice, etc., Fertilizer during work), groove cutting machine (after transplanting seedlings, cut the soil between the seedlings, improve the air suction rate into the soil, and vent the soil to hinder growth A working vehicle equipped with a machine to perform).

  1 shows a side view of a seedling transplanter according to an embodiment of the present invention, FIG. 2 shows a plan view of the seedling transplanter of FIG. 1, and FIG. 3 shows a seedling transplanter of FIG. The front view of a front wheel part is shown. 4 shows a side view of the front portion of the seedling transplanter of FIG. 1, FIG. 5 shows a right side view of the fertilizer application of the seedling transplanter of FIG. 1, and FIG. FIG. 7 shows a block diagram of a control device for controlling the fertilization amount of the seedling transplanting machine of FIG. 1. 8 shows a front sectional view of the axle housing portion of the seedling transplanter of FIG. 1, FIG. 9 (a) shows a side view of the slip ring portion of the axle housing portion, and FIG. 9 (b). Fig. 10 shows a side view of a slip ring portion of another embodiment, Fig. 10 shows a side view of another embodiment of the stroke sensor portion, and Fig. 11 shows a plan view of the stroke sensor portion of Fig. 10. .

  The seedling planting machine 1 has a multi-row planting configuration in which a lifting link 3 having a parallel link structure is provided on the rear side of a vehicle body frame 2 provided with traveling devices 10 and 11 for traveling in a field, and seedlings are planted on the soil surface on the lifting link 3. A seedling planting device 4 is connected, and a fertilizer application device 5 for applying fertilizer to a soil surface on which seedlings are planted is mounted on the rear part of the vehicle body frame 2. The vehicle body frame 2 has a pair of left and right front wheels 10 and a rear wheel 11 to form a tractor vehicle body form of a riding four-wheel drive type, a transmission case 12 is arranged at the front, a driver seat 31 is provided at the top, a steering handle A front cover 32 incorporating various operation mechanisms is provided on the front side of the steering post having 34, and a center mascot 33 or the like serving as an indicator of straight traveling is provided.

  Further, a floor step 35 is provided on the body frame 2, and a preliminary seedling stage 38 is provided on the left and right sides of the front part of the body frame 2 and on the side of the machine body to place a supplementary seedling. An operation panel 39 for operating the seedling transplanter 1 is provided on the upper surface of the front cover 32.

  The seedling planting device 4 includes a seedling tank 51 that places seedlings and feeds them to a planting part, and a planting device 52 that separates and holds seedlings that are fed from the seedling tanks 51 and plant them on the soil surface. 55, and the soil surface leveled by the side float 56, it is set as the structure of the multi-row planting form of a total of six-row planting, planting every two floats for every float 55,56.

  The center float 55 and the side float 56 are grounded and slid on the center part of the lower part of the seedling planting device 4 and the left and right sides, respectively, swinging up and down, and leveling the soil surface. The raising / lowering cylinder 53 is expanded and contracted by the movement, and the raising / lowering control is performed so as to maintain the seedling planting depth constant by raising / lowering the seedling planting device 4 to a desired ground height.

The fertilizer applicator 5 has a hopper 60 that stores fertilizer at the top, and a feeding roll 13 that receives and feeds the fertilizer flowing down from a supply port 60 c (FIG. 5) at the bottom (bottom) of the hopper 60. The supply shaft 60c is provided with a shutter 40, an adjustment plate 41 for adjusting fertilization amount, and the like. The shutter 40 is manually operated. When the shutter 40 is slid toward the supply port 60c, the supply port 60c is closed.
Then, the amount of fertilization supplied from the hopper 60 to the feeding roll 13 is adjusted by changing the opening degree of the supply port 60c by the adjustment plate 41, and the adjustment is made.

  In addition, a fertilizer guide 63 that forms a fertilizer groove near the seedling planting position by the seedling planting device 52 is attached to the floats 55 and 56 located in front of the planting position of the seedling planting device 52. . The fertilizer fed by the feed roll 13 is guided by the fertilizer hose 62 and discharged into the fertilizer groove of the soil for fertilization.

  Further, a fertilizer concentration sensor 71 that detects the fertilizer concentration in the soil while fertilizing and running is provided inside the left and right traveling front wheels 10. The fertilizer concentration sensor 71 is plunged into the soil, and current resistance or electrical conductivity in the soil between the left and right sensors 71 is detected. The fertilizer concentration sensor 71 is composed of a disk-shaped electrode plate.

The fertilizer application control device 72 built in the front cover 32 controls the adjustment actuator that adjusts the feed amount by the feed roll 13 based on the detection data of the fertilizer concentration sensor 71 to change and adjust the fertilizer application amount of the fertilizer applicator 5. To do. In the present embodiment, an example in which an adjustment motor 6 is used as an adjustment actuator (drive device) is shown.
The adjusting motor 6 operates the adjusting plate 41 and adjusts the opening of the supply port 60c as described above, thereby adjusting the fertilizing amount fed from the hopper 60 to the feeding roll 13, that is, the feeding amount by the feeding roll 13. This fertilization amount adjustment mechanism will be described in detail later.

  When the seedling planter 1 travels in the field, the fertilizer in the hopper 60 is discharged from the fertilizer guide 63 to the soil on the front side of the center float 55 and the side float 56 via the feed roll 13 and the fertilizer hose 62 in the feed case 20. Is done. The seedling planting device 52 acts on the soil prepared by sliding the center float 55 and the side float 56 to plant seedlings in the seedling tank 51. At this time, a pair of left and right fertilizer concentration sensors 71 detects the electrical resistance or electrical conductivity of the soil between the left and right traveling front wheels 10, and the controller 72 calculates the soil fertilizer concentration.

  Moreover, the temperature sensor 73 which detects the temperature of soil is provided, the detection data of the said fertilizer density | concentration sensor 71 are correct | amended based on the detected temperature data, and the adjustment motor 6 is controlled based on this detection data after correction | amendment, and fertilizer delivery amount The fertilizer application amount of the fertilizer application device 5 may be changed. The amount of fertilization can be changed to an appropriate amount in accordance with the change in energization resistance or electrical conductivity due to the difference in soil temperature, and the adjustment accuracy of fertilization can be improved by a simple measurement method.

  Specifically, since the movement of molecules is activated when the temperature of the soil is high, it is easy to energize, so the reference value of the energization amount for changing the fertilization amount is increased. On the other hand, if the temperature of the soil is low, the movement of molecules becomes dull and it is difficult to energize, so the reference value of the energization amount for changing the fertilization amount is lowered.

  Also, a cultivator depth sensor 74 for detecting the cultivator depth of the field is provided, the hardness of the soil is detected, the detection data of the fertilizer concentration sensor 71 is corrected based on the detection data of the hardness, and the corrected The adjustment motor 6 may be controlled based on the detection data to increase or decrease the fertilizer feed amount, and the fertilizer application amount of the fertilizer application device 5 may be changed. The amount of fertilization can be changed to an appropriate amount in accordance with the change in energization resistance or electrical conductivity due to the difference in soil hardness, and the adjustment accuracy of fertilization can be improved by a simple measurement method.

  Specifically, in a hard field, the fertilizer component is difficult to leak out and the amount of energization does not change because it is difficult to collapse or deform even if there is contact with the front wheel 10, the rear wheel 11, or a leveling rotor (not shown). Does not occur much. For this reason, the reference value for changing the fertilizer amount is changed to a low value. On the other hand, soft fields tend to collapse or deform due to contact with the front wheels 10, rear wheels 11, leveling rotors, etc., so that fertilizer components can easily leak and the energization amount changes frequently. For this reason, the reference value of fertilizer application amount change is changed high.

Also, a GPS receiver 75 that receives GPS signals from a plurality of sanitations in the sky and acquires its own position data is mounted, and fertilizer concentration and fertilizer application amount at various locations in the field for each position data acquired by the GPS receiver 75 A data box 76 for storing the data may be provided.
If it does in this way, since the data used as the standard at the time of performing fertilization work in the same field or a field with similar environment can be acquired, when storing the acquired data in control device 72, fertilizer application based on this data By automatically changing the fertilization amount of 5, the fertilization control after the next time is improved.

  Further, the optimum fertilization work can be performed based on the data in the acquired data box 76, and the control device 72 controls the seedling planter 1 to travel along a desired travel route, thereby unmanning the work. Can be achieved.

  Further, the detection data of the fertilizer concentration sensor 71, the detection data of the temperature sensor 73, and the detection data of the tiller depth sensor 74 are integrated, and the control motor 72 is controlled by the control device 72 based on the integrated data to apply fertilization. You may make it change the fertilization amount of the apparatus 5. FIG. By doing in this way, it becomes possible to change the fertilization amount to an appropriate amount following the change of the working condition, and the fertilizing accuracy is further improved and it is possible to adapt to various working conditions.

  Here, the control device 72 includes a reference fertilization amount calculation unit that calculates an appropriate fertilization amount according to the field based on the detection value of the fertilizer concentration sensor 71, that is, a reference fertilization amount, and a reference fertilization amount calculation unit. The adjustment motor 6 is driven to adjust the feeding amount from the feeding roll 13 so that the fertilization amount calculated by the above is satisfied. The spiral shaft 7 rotated by the adjusting motor 6 is provided with an indicating needle (moving member) 9 for indicating a fertilizer application amount. When the spiral shaft 7 rotates, the indicating needle 9 moves along the spiral.

  As described above, the adjustment motor 6 is configured to operate the adjustment plate 41 to adjust the feeding amount by the feeding roll 13 and to move the indicator needle 9. The movement amount of the indicating needle 9 is detected by a stroke sensor (movement amount detection means) 14. The control device 72 has an adjusted fertilizer amount calculation unit that calculates the fertilizer amount adjusted by the adjustment plate 41 from the position of the adjustment plate 41 based on the detection value by the stroke sensor 14. The adjustment motor 6 is driven so that the applied fertilizer amount matches the fertilizer amount value calculated by the reference fertilizer amount calculator, and the drive is stopped when both fertilizer amount values match.

  The adjustment plate 41 (shown in FIG. 5 and not shown in FIG. 6) has a rack on its lower surface, and a pinion of the adjustment shaft 42 is engaged with the rack. Therefore, when the adjustment shaft 42 is rotated, the adjustment plate 41 is linearly moved by the rack and the pinion, and the position of the adjustment plate 41 is adjusted. The adjustment shaft 42 for moving the adjustment plate 41 is interlocked and rotated by the adjustment motor 6 via the helical shaft 7, the bell crank 43, the link rod 44, the link arm 45, the gears 46, 47, and the like. Adjust the opening. The bell crank 43 is rotatable about the swing shaft 48 on the rear frame 19, and the tip end portion of the spiral shaft 7 is fitted to the upper end of the bell crank 43 by an interlocking pin 49 so as to be rotatable up and down.

  The fertilizer concentration sensor 71 detects the concentration of fertilizer components in the soil as the seedling machine 1 travels, and the control device 72 calculates the fertilizer application amount in the soil at the travel position, while driving the adjustment motor 6 and spirals. The shaft 7 adjusts the fertilizing amount (feeding amount) of the fertilizer application device 4 by the feeding roll 13 and moves the indicator needle 9.

  The movement of the indicating needle 9 is detected by the stroke sensor 14, and the feed amount by the adjusting plate 41, that is, the fertilizer amount is calculated from the detection value by the stroke sensor 14, and the calculated fertilizer amount is calculated by the reference fertilizer amount calculator. When the calculated fertilizer amount is reached, the adjustment motor 6 is stopped and the fertilizer amount adjustment is stopped.

  Conventionally, when the rotational speed of the feeding motor is slow, there is a problem that a time lag until the fertilizer application amount corresponding to the detected traveling speed is changed becomes large. In addition, in order to finely control the rotation speed of the feeding motor, there is a problem that the cost is increased and the maintainability is lowered.

However, in the configuration in which the current fertilization amount is determined from the detection value (the distance between the detection unit and the detected portion) of the stroke sensor 14 of the present embodiment, if there is a change in the fertilization amount, the change in the distance of the stroke sensor 14 is captured. Since the adjustment motor 6 is stopped, the number of parts and the control process are simplified, so the maintenance is improved with a simple configuration and it is easy to cope with small changes in the amount of fertilizer. Can be done.
According to this structure, since the fertilizer supply amount of the fertilizer application apparatus 5 is automatically adjusted according to the fertilizer density | concentration of a farm field, the fertilizer density | concentration of the whole farm field can be made uniform. Therefore, the crop grows uniformly throughout the field, making it easier to determine when to perform weeding, insect repellent, etc., and to perform the harvesting operation efficiently.

  Further, the amount of fertilization by the adjustment plate 41 is detected by the stroke sensor 14 as the movement amount (operation stop position) of the indicating needle 9, so that the adjustment motor 6 can adjust even a small amount (for example, in millimeters) of the operation amount. As a result, the fertilizer concentration in the field is made uniform and fertilization accuracy is improved, and the growth of the crop is stabilized and the quality is improved.

  In addition, the control device 72 for calculating an appropriate fertilizer amount is configured to calculate the fertilizer amount by detection by the fertilizer concentration sensor 71 and detection by a tiller depth sensor 74 that detects the depth of the soil tiller. Also good.

  That is, the fertilizer amount calculated by the reference fertilizer amount calculating unit of the control device 72 is detected by the tiller depth sensor 74 that detects the fertilizer concentration detected by the fertilizer concentration sensor 71 and the depth of the soil layer to be fertilized. Thus, an appropriate fertilizing amount with respect to the soil position at the time of traveling is calculated. Under the detection conditions by these sensors 71 and 74, the adjustment motor 6 is driven and the rotation of the feeding roll 13 is controlled. The fertilizer feed and fertilizer amount are adjusted, and the movement stop position of the indicator needle 9 is detected by the stroke sensor 14 while the indicator needle 9 is moved. A large amount of fertilizer can be applied in soil, and a small amount of fertilizer can be applied in shallow soil, so that the fertilizer concentration can be made uniform regardless of changes in soil depth and depth.

Further, the spiral shaft 7 and the indicator needle 9 moved by the spiral shaft 7 are provided in a sensor case 16 provided with an indicator 15, and the movement position of the indicator needle 9 can be seen through from the outside of the sensor case 16. It is also good.
As described above, the fertilizer concentration on the soil surface during fertilizer application is determined by the fertilizer concentration sensor 71, the adjustment motor 6 is operated to operate the adjustment plate 41, and the indicator needle 9 is moved. The see-through state of the indicating needle 9, the indicating needle 9 detected by the stroke sensor 14, and the stop indicating position can be seen through from the outside of the sensor case 16.

  And each fertilizer applicator 5 is arranged in parallel by the left-right and the horizontal direction (horizontal direction). A feeding roll (having a star-shaped cross section) 13 having a feeding groove having a constant volume formed on the circumferential surface of the rotation is arranged along the feeding shaft 21, and each feeding case 20 from an upper hopper 60 formed wide in the lateral direction. The fertilizer which consists of powder, a grain material, etc. which flow down and is supplied to is fed into the feeding groove and rotated. The feed shaft 21 is rotated in conjunction with the gears 22 and 23 of the interlocking shaft 27 that is interlocked with the rotating PTO shaft 36 supplied with the driving force from the transmission case 12, so that the front wheels 10 and the rear wheels 11 are transmitted. It is transmitted and rotated with a constant interlocking ratio with the rotation, and is fed from the feeding roll 13 and fertilized. In the vicinity of the rear frame 19, a fertilization transmission mechanism (not shown) for supplying the driving force of the PTO shaft 36 to the fertilizer application 5 is provided, and the rotational driving force of the interlocking shaft 27 is supplied from the fertilization transmission mechanism.

  The blower duct 25 and the fertilizer recovery duct 28 are arranged along the lateral direction before and after each feeding case 20, and one side end thereof is switched from the blower 29 by the switching valve to the blower duct 25 or the recovery duct 28. Blow. A discharge port 26 faces the fertilizer cylinder 24 at the lower portion of the feeding case 20, receives fertilizer fed by the feeding roll 13, and transports it to the fertilizing hose 62 by blowing air blown from the blower duct 25. Each fertilizer hose 62 applies the fertilizer by spraying the fertilizer into the groove formed by the fertilizer guide 63 with the discharge port at the lower end of the fertilizer hose 62 facing the fertilizer guide 63.

  The supply port 60 c at the lower end of the hopper 60 communicates with the upper part of the feeding case 20, and the fertilizer in the hopper 60 flows into the feeding roll 13. The fertilizer amount adjusting mechanism K for adjusting the fertilizer amount includes an openable / closable shutter 40 provided in the supply port 60c as described above, and an adjustment plate 41 provided on the lower side of the shutter 40 and adjustable in movement in the front-rear direction. In addition, the adjustment shaft 42, the spiral shaft 7, the bell crank 43, the link rod 44, the link arm 45, the gears 46 and 47, the swing shaft 48, the interlocking pin 49, the adjustment motor 6, etc. By moving the plate 41, the opening of the supply port 60c is adjusted to adjust the amount of fertilizer supplied to the feeding roll 13.

The adjustment motor 6, the stroke sensor 14, the spiral shaft 7, the sensor case 16, and a linkage mechanism such as a link mechanism or a gear mechanism for interlocking the adjustment shaft 42 with the spiral shaft 7 are provided in the feeding case 20 with the feeding roll 13 incorporated therein. The sensor case 16, the adjustment motor 6 and the like are arranged on the outer side and arranged on the front side of the feeding case 20 and the driver's seat 31 side so that the driver can easily see through the indicator 15 and the position of the indicator needle 9 in the sensor case 16. doing.
Then, in FIG. 6, a laser beam is applied by the laser oscillator 98 positioned on the adjustment motor 6 side to the indicator needle 9 which is moved back and forth by screwing the boss portion 59 (FIG. 10) onto the spiral shaft 7. Thus, the moving position is detected. A light receiving plate (not shown) is provided on the indicating needle 9 side. In this example, the stroke sensor 14 includes a laser oscillator 98 and a light receiving plate.

  Further, as shown in FIGS. 10 and 11, the cylinder 69 fixed at a fixed position on the sensor case 16 side and the spindle 70 integrated on the indicator needle 9 side are fitted and expanded to detect the amount of movement of the indicator needle 9. The configuration of the stroke sensor 14 can also be adopted. In FIG. 6, a laser oscillator 98 is provided on the adjustment motor 6 side. In FIG. 10, a laser oscillator 98 is provided on the opposite side of the adjustment motor 6, and this is different from the configuration of FIG. Other basic configurations are the same.

  According to FIG. 10, a laser oscillator 98 is provided on the side of the cylinder 69, and a laser light receiving plate 99 is attached to the spindle 70. FIG. 10B is a diagram of the stroke sensor 14 portion of FIG.

  In the case of the laser displacement sensor type, the stroke sensor 14 which is a distance detecting device changes the spot from the amount of change because the spot emitted from the light emitting element (laser oscillator 98) changes when the light receiving element (light receiving plate 99) moves. calculate. In FIG. 11, a case where the light receiving plate 99 moves to the adjusting motor 6 side is indicated by a one-dot chain line. When the detection value of the fertilizer concentration sensor 71 is changed, the control device 72 determines whether the direction is an increase direction or a decrease direction, rotates the adjustment motor 6, and rotates the spiral shaft 7. The light receiving plate 99 is configured to slide in accordance with the rotation of the spiral shaft 7, and the moving distance calculated from the detected value of the fertilizer concentration sensor 71 (the distance between the light emitting element and the light receiving element, indicated by the laser light 100) is constant. Move until

 Since a change in distance can be calculated instantaneously by using a laser, it can cope with a slight change (in millimeters). Further, since the adjustment motor 6 is activated as soon as the increase or decrease direction is transmitted from the control device 72, the reaction speed is greatly improved as compared with the conventional case.

  As shown in FIGS. 8 and 9, the front wheel 10 is rotatably provided around the kingpin shaft 84 at the end portion of the front axle housing 93 that supports the axle 80, and is steered by operating the steering handle 34. Is done.

  In this embodiment, a fertilizer concentration sensor for detecting soil fertilizer concentration is mounted as an electrode plate 71 on the axle 80 of the front wheel 10, and rotates integrally with the axle 80 of the front wheel 10 inside the steering case 82. The rotation side electrode 81 of the slip ring 64 to be joined to the electrode plate 71 and the fixed side electrode 83 of the contact that contacts this are provided, and the electrode plate 71 is brought into sliding contact with the rotation side electrode 81 and the fixed side electrode 83. Between the control device 72 and the control device 72 is set to a constantly energized state.

  A front axle housing 93 that axially mounts the axle 80 of the front wheel 10 includes a slip ring 64 that rotates integrally with the axle 80 and a pair of conductive brushes 67 and 68 that are in sliding contact with the upper portion of the rotational peripheral surface 65 of the slip ring 64. Is provided.

  When the fertilizer machine body 2 is fertilized, the left and right electrode plates 71 provided on the axle 80 together with the front wheels 10 are stepped into the soil and rotated, and the fertilizer contained in the soil is determined by the conductivity between the left and right electrode plates 71. The concentration of is detected. The electrical conductivity between the electrode plates 71 is energized from the electrode plate 71 to the control device 72 via the slip link 64 and the conductive brushes 67 and 68 that are in sliding contact with the rotating peripheral surface 65 of the slip ring 64. Since the slip link 64 and the conductive brushes 67 and 68 are arranged as a pair of front and rear along the rotary peripheral surface 65, either the front or rear conductive brush 67 or 68 is attached to the rotary peripheral surface 65 of the slip ring 64. The slidable contact is used to maintain accurate and stable conduction and detection. Further, since the outer peripheral portions of the slip ring 64 and the conductive brushes 67 and 68 are covered with the front axle housing 93 to prevent the intrusion of muddy water or the like, the precise fertilizer concentration is maintained.

  By providing the electrode plate 71 as a fertilizer concentration sensor inside the left and right front wheels 10, 10, the electrode plate 17 is always in contact with the farm field, so that it is prevented that a fertilizer concentration detection error occurs. Therefore, the change of the fertilizer supply amount according to the fertilizer concentration in the field can be calculated with high accuracy.

  Further, a kingpin shaft 84 provided in the vertical direction deviating outward in the left-right direction of the body frame 2 toward the lower side, a pair of bevel gears 85 transmitting from the kingpin shaft 84 to the axle 80, a harness 86 conducting to the fixed side electrode 83, When viewed from the front of the machine body, the guide pipe 87 disposed to be displaced outwardly in the left-right direction of the traveling vehicle body 2 along the kingpin shaft 84, the harness 88 that conducts to the rotation-side electrode 81, and the hole 89 for passing the harness 88. A spoke portion 90 of the front wheel 10, a pair of fixtures 91 for fixing the electrode plate 71 to the spoke portion 90, a foil cap 92 of the front wheel 10, and the like are provided.

  The electrode plate 71 has a circular shape whose outer periphery is smaller than the outer diameter of the front wheel 10, and the center of this circle is fitted to the axle 80, so that it is within the lateral width of the traveling front wheel 10, that is, on both the left and right sides of the traveling vehicle body 2. Each is arranged. A rotation-side electrode 81 that rotates integrally with the axle 80 and connects to the electrode plate 71, and a fixed-side electrode 83 that is provided in the steering case 82 that supports the axle 80 and contacts the rotation-side electrode 81 are provided. The plate 71 and the control device 72 are configured to be energized.

  As described above, the conductive brushes 67 and 68 provided in the front axle housing 93 have the arm 77 attached to the right upper end (see FIG. 9A), and the conductive brush 67 and the front and rear ends of the arm 77 are provided. 68, springs 78 are provided on the outer periphery of the shaft portion of the conductive brushes 67, 68, and the springs 78 are respectively pressed against the rotating peripheral surface 65 of the slip ring 64.

The conductive brushes 67 and 68 are configured so as to be detachable from the outer peripheral surface of the axle housing 93 through the mounting holes 79, and the mounting holes 79 can be opened and closed with a cap.
Further, the arm 77 and the conductive brushes 67 and 68 can be disposed at positions deviated from the position immediately above the axle 80 by an appropriate angle back and forth (see FIG. 9B). Further, the electric brushes 67 and 68 are slidably contacted so as to sandwich the rotating peripheral surface 65 of the slip ring 64 as a leaf spring form.

FIG. 12 shows another embodiment of the front wheel portion.
As shown in FIG. 12, the electrode plate 71 may be formed in the form of a plate ring along the inner surface of the rim diameter portion of the wheel 10 and attached to the tip portion of each spoke portion 90 with a fixture 95. The harness 88 of the electrode plate 71 is connected in a waterproof state through a pipe 97 attached along the spoke 90 from the hole 89 of the axle 80.

In FIG. 13, the side view of another Example of a fertilizer applicator is shown.
The fertilizer application 5 shown in FIG. 13 has a configuration in which an elastic body 101 is provided in the fertilizer application apparatus 5 shown in FIG. In addition, it cannot be overemphasized that the following structures are applied also to the structure of the fertilizer applicator 5 shown in FIG.

  Since the adjusting motor 6 is located immediately behind the driver's seat 31, it is built in the motor cover 103 so that an operator sitting in the driver's seat 31 does not touch it directly. An engine cover 104 that supports the driver's seat 31 and a rear step 105 behind the driver's seat 31 are provided on the body frame 2.

  And according to this structure, as shown in FIG. 13, the elastic body 101 for shock absorption is provided between the rear step 105 and the motor cover 103, and the adjustment motor 6 is made high-speed by this elastic body 101. Since the vibration generated during continuous operation can be absorbed, the amount of fertilizer discharged from the hopper 60 and the feeding roll 13 due to the vibration of the adjusting motor 6 is prevented from being disturbed, and an appropriate amount of fertilizer is supplied. The adjusting motor 6 and the stroke sensor 14 are rotated in the vertical direction around a mounting fulcrum (rotating fulcrum) 106 on the hopper 60 side.

The elastic body 101 may be a spring, a suspension, or the like, and the upper part is fixed to the motor cover 103 side and the lower part is fixed to the rear step 105 side by fixing means such as screws, bolts and nuts. In the illustrated example, it is provided in front of the rotation fulcrum 106.
The fertilizer application device 5 shown in FIG. 13 has a fertilization amount adjustment mechanism K that is long in the front-rear direction by a helical shaft 7 having a longitudinal direction in the front-rear direction, and therefore supports the lower part of the adjustment motor 6 having a particularly heavy feeling with the elastic body 101. Thus, the fertilizer application device 5 is stabilized as a whole.

In FIG. 14, the side view of another Example of a fertilizer application is shown.
The fertilizer application device 5 shown in FIG. 14 has a configuration in which a stretchable body 107 is provided at the front portion of the hopper 60 shown in FIG. 10, and the rest is the same as FIG.
The expansion and contraction body 107 provided between the motor cover 103 of the adjustment motor 6 and the side wall 60a of the hopper 60 can absorb vibration generated when the motor cover 103 operates continuously at high speed. It is prevented that the fertilizer discharge | release amount of the accompanying hopper 60 and the delivery roll 13 is disturb | confused, and an appropriate amount of fertilizer is supplied.

Further, when the telescopic body 107 is provided on the rear side of the vehicle body frame 2 such as between the rear step 105 and the motor cover 103, an operator can apply fertilizer, chemicals, seedlings to the fertilizer application device 5 and the seedling planting device 4 on the rear step 105. May interfere with the work of supplying the etc. However, by devising the position of the expansion and contraction body 107 in this way, the space can be used effectively, and the space on the rear step 105 at the rear of the body frame 2 can be opened, so that an operator can work on the body frame 2. It will be easier and work efficiency will be improved.
The stretchable body 107 may be a damper, a cylinder, or the like, and the upper part is fixed to the hopper 60 side and the lower part is fixed to the motor cover 103 side by fixing means such as screws, bolts, and nuts.

  The fertilizer application device 5 shown in FIG. 14 has a fertilization amount adjustment mechanism K that is long in the front-rear direction by a spiral shaft 7 having a longitudinal direction in the front-rear direction, and therefore supports the upper part of the adjustment motor 6 having a particularly heavy feeling with a stretchable body 107. Thus, the fertilizer application device 5 is stabilized as a whole. Further, when the elastic body 101 shown in FIG. 13 is provided, the adjustment motor 6 can be supported from the lower part and the upper part of the adjustment motor 6, so that the sense of stability is further increased.

  Further, as shown in FIG. 10 and FIGS. 13 to 14, if a heavy ball screw 111 is provided at the rear end portion of the spiral shaft 7 so that the ball screw 111 can be moved in the front-rear direction along the spiral shaft 7, Also functions as a balance weight. The ball screw 111 includes a handle portion 111a and a balance weight portion 111b, and may be made of metal such as copper or iron. By providing the ball screw 111 on the opposite side of the adjustment motor 6 from the rotation fulcrum 106 (behind the rotation fulcrum 106), the weight and balance of the adjustment motor 6 can be maintained, so that the stability of the fertilizer 5 increases. .

  According to this configuration, even when the adjustment motor 6 operates at a high speed when increasing or decreasing the fertilization amount, the occurrence of vibration can be prevented by the weight of the ball screw 111. Therefore, the fertilizer discharge amount of the hopper 60 and the feeding roll 13 accompanying the vibration of the adjusting motor 6 is prevented from being disturbed, and an appropriate amount of fertilizer is supplied.

  Further, when the handle portion 111a of the ball screw 111 is manually rotated, the position of the ball screw 111 is changed, so that the effect as a balance weight can be easily adjusted. Can be supplied more appropriately. Further, since it is not necessary to provide a balance weight separately from the ball screw 111, a simple configuration is achieved and cost reduction is achieved.

In FIG. 15, the side view of another Example of a fertilizer applicator is shown.
The fertilizer application device 5 shown in FIG. 15 has a configuration in which a stretchable body 108 is provided at the rear part of the hopper 60 shown in FIG.
Since the expansion and contraction body 108 provided between the rear end portion of the spiral shaft 7 and the side wall 60a of the hopper 60 can absorb vibration generated when the motor cover 103 continuously operates at high speed, It is prevented that the fertilizer discharge | release amount of the accompanying hopper 60 and the delivery roll 13 is disturb | confused, and an appropriate amount of fertilizer is supplied.

  The stretchable body 108 may be a damper, a cylinder, or the like, similar to the stretchable body 107 provided between the motor cover 103 and the side wall 60a of the hopper 60 shown in FIG. What is necessary is just to fix to 111 side by fixing means, such as a screw, a volt | bolt, and a nut. Although not shown, there is a cover around the balance weight portion 111b of the ball screw 111, and the cover is supported by the ball screw 111 with a bearing, and the extendable body 108 is attached to this cover.

The stretchable body 108 provided between the ball screw 111 and the hopper 60 further prevents the amount of fertilizer discharged from the hopper 60 and the feeding roll 13 from being disturbed by the vibration of the adjusting motor 6, and an appropriate amount of fertilizer is supplied. The Further, when the position of the ball screw 111 is changed, the expansion / contraction body 108 moves to the one-dot chain line position, and is shortened in the illustrated example.
In addition, you may install both the expansion-contraction body 107 ahead of the rotation fulcrum 106 shown in FIG. 14, and the expansion-contraction body 108 behind the rotation fulcrum 106 shown in FIG. In that case, since the fertilizer application amount adjusting mechanism K of the fertilizer application device 5 is supported from both before and after the rotation fulcrum 106, a sense of stability is increased.

In FIG. 16, the figure of the hopper 60 part of the fertilizer applicator 5 is shown. FIG. 16A shows a rear view of the hopper 60 portion, and FIG. 16B shows a plan view of the hopper 60 portion.
A plurality of inclined portions 60b narrowing downward are formed in the lower portion of the hopper 60 having a longitudinal direction in the lateral direction, and a supply port 60c is provided at the lower end of each inclined portion 60b. Accordingly, the fertilizer in the hopper 60 is fed from the inclined portion 60b to the lower feeding roll 13 through the supply port 60c.

  Fertilizer tends to accumulate in the inclined portion 60b of the hopper 60, and the fertilizer must be brought to the supply port 60c in the center by striking from the outside of the hopper 60 so that the fertilizer does not harden due to its own weight or moisture. In addition, when the fertilizer accumulates in the hopper 60 and hardens to form a layer, a situation where fertilizer is not applied occurs despite the presence of the fertilizer in the hopper 60.

  However, as shown in FIG. 16, when a stirring blade (which may be a plate) 117 for stirring the fertilizer in the hopper 60 is provided, the fertilizer collected in the inclined portion 60b of the hopper 60 can be stirred by the stirring blade 117. Thus, the amount of fertilizer discharged to the feeding roll 13 is kept constant. Therefore, the supply amount of fertilizer is stabilized and the growth of the crop is improved.

  Further, the problem that fertilizer is not applied despite the presence of fertilizer in the hopper 60 is also solved, so that it is possible to prevent a crop from causing poor growth due to lack of fertilizer without applying fertilizer.

  As shown in FIG. 16, an agitation motor 119 that is a drive actuator is provided on the side of the hopper 60, and the rotation drive shaft 115 that passes through each inclined portion 60 b is driven by the agitation motor 119. By attaching the stirring blade 117 to the outer peripheral surface of the rotation drive shaft 115, when the rotation drive shaft 115 rotates, the stirring blade 117 also rotates and agitates against the fertilizer in the inclined portion 60b of the hopper 60. The cross-sectional shape of the stirring blade 117 may be a star shape or a cross shape (including a swirl shape) as shown in FIG.

Then, by placing the stirring motor 119 for driving the rotary drive shaft 115 outside the side wall 60a of the hopper 60, fertilizer, chemicals, seedlings and the like can be placed on the hopper 60. Work can be done. Therefore, work efficiency is improved.
In addition, if the agitation motor 119 is installed so that the upper end of the agitation motor 119 is lower than the upper end of the hopper 60, fertilizers, chemicals, seedlings, etc. can be placed on the hopper 60 widely. The work efficiency is further improved.

  When the rotation drive shaft 115 of the stirring motor 119 is provided at the lower part of each inclined portion 60b, stirring is performed in a narrow space, and since a small amount of fertilizer is stirred, the efficiency is not good. When provided at the upper part of each inclined part 60b, for example, the upper end part (inclined start end part) S of each inclined part 60b, a large amount of fertilizer flowing down to the inclined part of the hopper 60 can be efficiently stirred in a wide space.

In FIG. 18, the figure of another Example of the hopper 60 part of the fertilizer applicator 5 is shown. 18A shows a rear view of the hopper 60 portion, FIG. 18B shows a plan view of the hopper 60 portion, and FIG. 18C shows a side view of the hopper 60 portion. 1 is a schematic diagram showing a partial cross section.
When the fertilizer lump falls into the hopper 60, the inclined portion 60b is easily clogged. Therefore, as shown in FIG. 18, a sieve net 130 may be provided in the hopper 60. The net 130 is provided at the upper end S of each inclined portion 60 b of the hopper 60 and is attached to a slide shaft 132 that slides in the left-right direction by driving of a drive actuator, for example, a motor 135. For example, when the net portion 130a is positioned by the positioning pin 139, positioning and removal can be easily performed, and maintenance is improved.

When the rails 137 are provided at both front and rear ends of the upper end of each inclined portion 60b of the hopper 60, the net 130 can slide on the rail 137 to the left and right.
Since the fertilizer in the hopper 60 is screened off by the net 130 swinging left and right, the fertilizer is prevented from being clogged by the inclined portion 60b. A net operating switch 140 is provided in the driver's seat 31, and the net operating motor 135 is driven by turning on / off the net operating switch 140 to swing the net 130.

When a biased vibration is applied to the mesh 130, the mesh shape is gradually twisted or distorted to change the shape of the mesh. In order to perform the role as the net 130 normally, an equal mesh is necessary, and it is better that no deformation occurs.
Therefore, as shown in FIG. 18 (a), when the slide shaft 132 is passed through the center portion in the front-rear direction of the mesh portion 130a, the force applied during the slide becomes substantially the same in both the front and rear directions. Deformation can be prevented.

In FIG. 19, the rear view of another Example of the hopper 60 part of the fertilizer applicator 5 is shown.
The net 130 shown in FIG. 18 may be configured to be interlocked with a planting clutch (not shown). Engine power is transmitted from the planting clutch (not shown) in the planting clutch case (not shown) to the planting transmission case 142 of the seedling planting device 4 via the planting transmission shaft 138 (Fig. 1). Thus, the seedling tank 51 and the planting device 5 operate.

The planting clutch is turned on and off by operating a planting operation lever 141 (FIG. 2) provided near the driver's seat 31.
Therefore, if the net 130 swings left and right when the planting operation lever 141 is entered, the fertilizer can be prevented from sticking or staying during the planting operation.

  As shown in FIG. 19, a planting switch 145 is provided on the planting operation lever 141 to detect on / off of the planting operation lever 141 and control the motor 135 for operating the net 130. The planting switch 145 is preferably provided at a position where the planting operation lever 141 is touched. There is also a method of detecting a change in angle by providing a potentiometer at the base of the planting operation lever 141. Therefore, it is possible to prevent the fertilizer from being hardened during the planting operation lever 141, that is, during the planting operation. In addition, although the vibration by rotation of the stirring blade 117 generate | occur | produces in this case, it can prevent that a fertilizer becomes a lump and fertilization is not performed appropriately, a non-fertilization area arises and a problem arises in the growth of a seedling.

On the other hand, when the seedling transplanter 1 is turned, that is, when the planting operation lever 141 is turned off, the net 130 may be configured to swing left and right.
Since the planting operation lever 141 is automatically turned off when the seedling transplanter 1 is turned, it is possible to prevent the fertilizer from sticking or staying during the planting work by swinging the net 130 in a short time during the turning. Note that the seedling transplanter 1 of this embodiment has a function of automatically turning the planting unit 4 when the steering wheel 34 is turned by a predetermined angle or more when turning, and the planting part 4 is automatically raised. Accordingly, the planting operation lever 141 is automatically operated to the cut-off state.

  And it is the structure which stirs the fertilizer in the hopper 60 only in the state which the planting operation lever 141 is a cut state, ie, the state which does not perform a planting operation. When the planting is stopped, the fertilization is also stopped in conjunction with it, so that the vibration applied to the fertilizer 5 is not applied and it becomes easy to solidify. For this reason, it can prevent that a fertilizer becomes a lump by turning the stirring blade 117. FIG. Further, since extra vibration does not occur during the planting operation, there is an advantage that the operator is less likely to feel discomfort and the operation time is short, so that power consumption is reduced.

  The present invention is not limited to a seedling transplanter connected with a seedling planting device, but may be used for a tractor connected with a tillage device.

DESCRIPTION OF SYMBOLS 1 Seedling machine 2 Body frame 3 Lifting link 4 Seedling device 5 Fertilizer 6 Adjusting motor 7 Spiral shaft 9 Pointer needle 10 Front wheel 11 Rear wheel 12 Transmission case 13 Feeding roll 14 Stroke sensor 15 Indicator 16 Sensor case 19 Rear frame 20 Feeding Case 21 Feed shaft 22, 23 Gear 24 Fertilizer cylinder 25 Blower duct 26 Discharge port 27 Interlocking shaft 28 Fertilizer recovery duct 29 Blower 31 Driver's seat 32 Front cover 33 Center mascot 34 Steering handle 35 Floor step 36 PTO shaft 38 Spare seedling stand 39 control panel
40 Shutter 41 Adjustment plate 42 Adjustment shaft 43 Bell crank 44 Link rod 45 Link arm 46, 47 Gear 48 Oscillating shaft 49 Linking pin 51 Seedling tank 52 Planting device 53 Lifting cylinder 55 Center float 56 Side float 59 Boss portion 60 Hopper 62 Fertilizer hose 63 Fertilizer guide 64 Slip ring 65 Rotating peripheral surface 67, 68 Conductive brush 69 Cylinder 70 Spindle 71 Fertilizer concentration sensor (electrode plate)
72 Control Device 73 Temperature Sensor 74 Tillage Depth Sensor 75 GPS Receiver 76 Data Box 77 Arm 78 Spring 79 Mounting Hole 80 Axle 81 Rotating Side Electrode 82 Steering Case 83 Fixed Side Electrode 84 Kingpin Shaft 85 Bevel Gear 86, 88 Harness 87 Guide pipe 89 Hole 90 Spoke part 91 Fixing tool 92 Wheel cap 93 Axle housing 95 Fixing tool 97 Pipe 98 Laser oscillator 99 Laser light receiving plate 100 Laser light 101 Elastic body 103 Motor cover 104 Engine cover 105 Rear step 106 Rotation fulcrum 107, 108 Telescopic body 111 Ball screw (balance weight)
DESCRIPTION OF SYMBOLS 115 Rotation drive shaft 117 Agitation blade 119 Agitation motor 130 Net 132 Slide shaft 135 Net operation motor 137 Rail 138 Planting transmission shaft 139 Positioning pin 140 Net operation switch 141 Planting operation lever 142 Planting transmission case 145 Planting switch

Claims (6)

A working device (4) is provided at the rear part of the vehicle body frame (2) including the traveling wheels (10, 11), and a storage unit (60) for storing fertilizer and the storage unit (above the vehicle body frame (2)) 60), a feeding unit (13) for feeding fertilizer supplied from the storage unit (60), and a fertilizing amount adjustment for adjusting a fertilizing amount supplied from the storing unit (60) to the feeding unit (13). In a work vehicle provided with a fertilizer application device (5) provided with a portion (41) and supplying fertilizer to a farm field,
The fertilizer application (5)
An adjustment actuator (6) for adjusting the fertilization amount by driving the fertilization amount adjustment section (41);
A rotating shaft (7) that rotates by driving the adjusting actuator (6);
A moving member (9) provided on the rotating shaft (7) and moving in the axial direction by rotation of the rotating shaft (7);
A moving amount detecting means (14) for detecting the moving amount of the moving member (9);
Fertilizer concentration detection means (71) for detecting the fertilizer concentration in the soil while running fertilizer;
A reference fertilizer amount calculation unit that calculates a fertilizer amount serving as a reference based on the fertilizer concentration detected by the fertilizer concentration detector (71), and movement of the moving member (9) detected by the shift amount detector (14). An adjusted fertilizer amount calculation unit that calculates a fertilizer amount adjusted by the fertilizer amount adjuster (41) based on the amount, and is calculated by the adjusted fertilizer amount calculator to the fertilizer amount calculated by the reference fertilizer amount calculator. The adjustment actuator (6) is driven so that the applied fertilizer amount matches, and when the fertilizer amount calculated by the reference fertilizer amount calculation unit matches the fertilizer amount calculated by the adjusted fertilizer amount calculation unit, the adjustment actuator (6 And a control device (72) for stopping the vehicle. An actuator cover (103) for housing the adjusting actuator (6) is provided above the rear part of the vehicle body frame (2);
The work vehicle according to claim 1, wherein an elastic member (101) for absorbing shock is provided between the actuator cover (103) and the vehicle body frame (2). An actuator cover (103) that houses the adjustment actuator (6) is provided in the vicinity of the reservoir (60),
The work vehicle according to claim 1 or 2, wherein a shock absorbing elastic member (107) is provided between the actuator cover (103) and the reservoir (60). The rotation axis (7) is a helical axis (7),
A balance weight (movable in the front-rear direction) along the spiral of the rotary shaft (7) at the end of the rotary shaft (7) in the vicinity of the reservoir (60) and on the opposite side of the actuator (6). 111),
The work vehicle according to any one of claims 1 to 3, wherein a shock absorbing elastic member (108) is provided between the balance weight (111) and the storage portion (60). The traveling wheels (10, 11) include left and right front wheels (10, 10) and left and right rear wheels (11, 11).
The fertilizer concentration detection means (71) is an electrode plate (71) provided inside the left and right front wheels (10, 10),
The reference fertilizer amount calculation unit of the control device (72) is configured to calculate the fertilizer amount based on the energization amount detected by the electrode plate (71). The work vehicle described. The reservoir (60) comprises a hopper (60) having a longitudinal direction in the horizontal direction,
A rotational drive shaft (115) passing through the inclined portion (60b) at the bottom of the hopper (60) is provided along the longitudinal direction,
A stirring member (117) that rotates together with the rotary drive shaft (115) and stirs the fertilizer in the inclined portion (60b) is provided on the outer peripheral surface of the rotary drive shaft (115),
The work vehicle according to any one of claims 1 to 5, wherein a drive actuator (119) of the rotary drive shaft (115) is provided outside a side wall of the hopper (60).

Images