JP6601652B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter, and more particularly, to a seedling transplanter that includes a fertilizer and includes a fertilizer adjustment device that adjusts the fertilizer application amount applied by the fertilizer.

  Japanese Patent Laying-Open No. 2010-000019 (Patent Document 1) discloses a fertilizer working machine that transplants seedlings and applies fertilizer, and the simultaneous fertilization type rice transplanter disclosed in Patent Document 1 is provided on a traveling wheel. In addition to detecting fertilizer concentration with electrodes, the softness sensor detects mud hardness and softness, and the depth sensor detects the depth of the field. The fertilizer application amount is calculated, and the fertilizer application amount is sequentially increased or decreased.

  However, each field has different fertilizer concentration distribution and unevenness, so that depending on the field section, the amount of fertilizer calculated may cause excess or deficiency of fertilizer. In some cases, there was a problem of incurring lodging by the chief and an increase in fertilizer costs.

  Therefore, JP2013-146219A (Patent Document 2) proposes a fertilizer application machine that enables adjustment of fertilizer amount in accordance with the situation of each field section.

  The fertilizer application machine disclosed in Patent Document 2 detects the fertilizer concentration in the field with the electrodes attached to the left and right front wheels, detects the depth of the field with the depth sensor attached to the front side of the machine body, and the appropriate fertilizer amount When the calculated fertilizer amount is different from the fertilizer amount to be fertilized, the fertilizer amount switching device is provided to operate the fertilizer amount switching motor to change the fertilizer amount of the fertilizer.

  According to the fertilizer application machine disclosed in Patent Document 2, since the amount of fertilization can be adjusted for each place in the field, it is prevented from applying fertilizer to the field, and the amount of waste of fertilizer is reduced. It is possible to prevent the occurrence of poor growth due to a shortage of fertilizer to be applied.

JP 2010-000019 A JP 2013-146219 A

  However, in the fertilizer application machine disclosed in Patent Document 2, since the driving force is transmitted to the fertilizing device via a plurality of driving force transmission members, the amount of fertilizer is rapidly changed. In addition, when driving force is transmitted to the fertilizer, excessive load is applied to the driving force transmission member, the durability is reduced, or the driving force transmission member is damaged and the driving force is not transmitted to the fertilizer. There was a problem that there was.

  Furthermore, when the amount of fertilizer to be fertilized increases greatly, the amount of fertilizer supplied to the fertilizer feeding device that feeds the fertilizer in increments of a set amount increases rapidly. In addition, there is a problem that the fertilizer feeding device may be damaged and the driving force may not be transmitted to the fertilizer application device.

  Therefore, the present invention prevents an excessive load from being applied to the driving force transmission member and the fertilizer feeding device even when the amount of fertilizer to be fertilized greatly increases, and the amount of fertilizer to be fertilized by the fertilizer is desired. It aims at providing the seedling transplanting machine provided with the fertilization amount adjustment apparatus which can be adjusted like this.

The object of the present invention is a transmission (HST),
An output control member (HST servo motor) for increasing or decreasing the output of the transmission,
A seedling planting section provided at the rear of the traveling vehicle body;
A fertilizer supply device for supplying fertilizer to the field;
A fertilizer amount adjusting device (fertilizer amount adjusting motor) for changing the fertilizer amount supplied by the fertilizer;
A detection member (fertilizer concentration sensor, depth sensor, temperature sensor, etc.) for detecting the condition of the fertilizer;
Based on the condition of the fertilizer device detected by the detection member, the fertilizer device calculates a fertilizer amount to be supplied, and includes a control means for controlling the fertilizer amount adjustment device,
The fertilizer is disposed between the fertilizer hopper and the feeding device, the fertilizer hopper for storing the fertilizer, the feeding device for feeding the fertilizer falling from the fertilizer hopper by a predetermined amount, and the fertilizer hopper and the feeding device. In a seedling transplanting machine provided with a shutter capable of controlling communication between and a shutter driving member for opening and closing the shutter,
Based on the condition of the fertilizer applied by the detection member, the control means calculates the fertilizer amount Q to be supplied by the fertilizer. As a result, the current fertilizer amount Q0 and the fertilizer amount Q to be supplied by the fertilizer When the absolute value | Q−Q0 | is equal to or greater than the threshold value ΔQth, the control means uses the absolute value of the difference between the current fertilizing amount Q0 and the fertilizing amount Q to be supplied by the fertilizing device | Q-Q0 | than the time for driving the feeding device and the shutter drive member of the fertilizing device when it is less than the threshold value? Qth, the time for driving the feeding device and the shutter drive member of the fertilizing device This is achieved by a seedling transplanter characterized in that it is configured to be long.

According to the present invention, when the absolute value | Q−Q0 | of the difference between the current fertilizing amount Q0 and the fertilizing amount Q to be supplied by the fertilizing device calculated by the control means is equal to or greater than the threshold value ΔQth, The feeding device and the shutter drive member of the fertilizer when the absolute value | Q−Q0 | of the difference between the current fertilizer Q0 and the fertilizer Q to be supplied by the fertilizer is less than the threshold value ΔQth. than the time to drive, because the time for driving the feeding device and the shutter drive member fertilizing device is configured to be longer, excessive load on the driving force transmission member and fertilizer feeding device for transmitting a driving force to the fertilizer unit It is possible to prevent the application of the fertilizer and to adjust the amount of fertilizer applied by the fertilizer application as desired.

In the invention described in claim 2, in addition to the invention described in claim 1, the seedling transplanting machine includes a float disposed at a lower part of the seedling planting part, and fertilizer to the float from the fertilizer application device. A fertilizer supply hose to be supplied, a fertilizer recovery mode for discharging and collecting the fertilizer stored in the fertilizer hopper to the outside of the machine, and a fertilizer stored in the fertilizer hopper through a connecting pipe, the fertilizer hose A switching lever capable of switching between the fertilization mode to be supplied to the unit, and operating the switching lever to switch to a fertilizer recovery mode for recovering fertilizer, operating the shutter driving member to partially open the shutter When the switching of the switching lever to the fertilizer collection mode is completed, the shutter driving member is operated to completely open the shutter.

According to the second aspect of the invention, when the switching operation lever is switched to the fertilizer recovery mode, the shutter is initially configured to partially open, so that the switching operation lever is switched to the fertilizer recovery mode. When the fertilizer stored in the fertilizer hopper falls at once and the pipe for collecting the fertilizer is clogged, and the fertilizer collection work can be prevented from being interrupted. When the switching is completed, the shutter is configured to be fully opened, so that the work efficiency can be improved.

In the invention described in claim 3, in addition to the invention described in claim 2 , the seedling transplanter forms a groove for allowing the fertilizer discharged from the fertilizer hose to permeate in a field, and Provided with a supply detection sensor that is attached to the grooving device to detect whether or not fertilizer is supplied, and when the supply detection sensor does not detect the supply of fertilizer, the traveling vehicle body is not allowed to move forward. It is configured.

According to the invention described in claim 3, when the change between the current fertilizer application amount and the fertilizer application amount calculated by the control means is greater than or equal to the threshold value, the net member is moved substantially horizontally. When the fertilizer lump stored in the fertilizer hopper is included, the fertilizer lump is fined by the screen function of the net member, and thus the load for conveyance is reduced, Moreover, since the fertilizer falls from the fertilizer hopper little by little, it is possible to effectively prevent an excessive load from being applied to the fertilizer feeding device, and to adjust the amount of fertilizer applied by the fertilizer as desired. It becomes possible.

According to a fourth aspect of the present invention, in addition to the invention described in any one of the first to third aspects, the fertilizer applying device includes a net member in the fertilizer hopper, and a motor that moves the net member substantially horizontally. And when the change in the current fertilizer amount and the fertilizer amount calculated by the control means to be supplied by the fertilizer is equal to or greater than a threshold value, the net member is configured to move substantially horizontally by the motor. ing.

According to the invention described in claim 4, when the change between the current fertilizer application amount and the fertilizer application amount calculated by the control means is greater than or equal to the threshold value, the net member is moved substantially horizontally. When the fertilizer lump stored in the fertilizer hopper is included, the fertilizer lump is fined by the screen function of the net member, and thus the load for conveyance is reduced, In addition, since the fertilizer falls from the fertilizer hopper little by little, it is possible to effectively prevent an excessive load from being applied to the fertilizer feeding device, and to adjust the amount of fertilizer applied by the fertilizer as desired. It becomes possible .

In the invention described in claim 5, in addition to the invention described in any one of claims 1 to 4, the fertilizer applying device includes a net member in the fertilizer hopper, and the net member is moved up and down. A vertical movement motor that moves the net member up and down by the vertical movement motor when a change between the current fertilizer application amount and the fertilizer application amount calculated by the control means is greater than or equal to a threshold value. It is configured to move .

According to the invention described in claim 5, when the change between the current fertilizer application amount and the fertilizer application amount calculated by the control means is greater than or equal to the threshold value, the net member is moved up and down. Since the net member can be separated upward from the feeding device, when the fertilizer lump stored in the fertilizer hopper is contained, the fertilizer lump is made fine by the sieve function of the net member, As desired, the fertilizer can be dropped, thus reducing the load to transport, and since the fertilizer falls from the fertilizer hopper little by little, it is effective to overload the fertilizer feeding device Therefore, the fertilizer application amount of the fertilizer applied by the fertilizer application apparatus can be adjusted as desired.

In the invention described in claim 7, in addition to the invention described in any one of claims 1 to 6 , a float disposed at a lower portion of the seedling planting portion, and fertilizer is applied to the float from the fertilizer application device. A fertilizer hose to be supplied, a grooving device for forming a groove for infiltrating the fertilizer discharged from the fertilizer hose in the basin, and a supply attached to the grooving body device to detect whether fertilizer is supplied Equipped with a detection sensor,
When the supply detection sensor does not detect the supply of fertilizer, the traveling vehicle body is not allowed to move forward .

In the invention described in claim 7, in addition to the invention described in any one of claims 1 to 6 , the seedling transplanting machine includes a float disposed in a lower part of a seedling planting unit, and the fertilizer application. A fertilizer hose that supplies fertilizer to the float, a groover that forms a groove infiltrating the fertilizer discharged from the fertilizer hose, and whether or not fertilizer is supplied to the grooved body And a supply detection sensor for detecting the movement of the vehicle body when the supply detection sensor does not detect the supply of fertilizer .

The first invention related to the invention described in any of claims 1 to 7 includes a net member in a fertilizer hopper, a motor for moving the net member substantially horizontally, and a current fertilizer application. When the change between the amount and the amount of fertilizer to be supplied by the fertilizer application calculated by the control means is greater than or equal to a threshold value, the net member is configured to move substantially horizontally by the motor .

Contact Itewa the first related invention, when the change between the current Fertilization control means Fertilization should supply the calculated fertilizer device is above the threshold value, the mesh member to move substantially horizontally Because it is configured, when the fertilizer lump stored in the fertilizer hopper is included, the fertilizer lump is fined by the sieve function of the net member, thus reducing the load for conveying, and Since the fertilizer falls from the fertilizer hopper little by little, it is possible to effectively prevent an excessive load from being applied to the fertilizer feeding device and to adjust the amount of fertilizer applied by the fertilizer as desired. It becomes possible .

Further, a second related invention related to the invention described in any one of claims 1 to 7 is provided with a vertical movement motor for moving the mesh member up and down, and a current fertilizing amount and the control means. When the change with the fertilization amount to be supplied by the fertilizer application calculated above is equal to or greater than a threshold value, the net member is configured to move up and down by the vertical movement motor .
In the second related invention, when the change between the current fertilizer amount and the fertilizer amount to be supplied by the fertilizer applied by the control means is greater than or equal to a threshold value, the net member is configured to move up and down, Since the mesh member can be separated upward from the feeding device, when the fertilizer lump stored in the fertilizer hopper is contained, the fertilizer lump is shredded by the sieve function of the mesh member, as desired. The fertilizer can be dropped, thus reducing the load to transport, and the fertilizer will fall from the fertilizer hopper little by little, effectively preventing excessive load on the fertilizer feeding device It is possible to adjust the amount of fertilizer applied by the fertilizer application as desired.

  According to the present invention, even when the amount of fertilizer to be fertilized greatly increases, an excessive load is prevented from being applied to the driving force transmission member and the fertilizer feeding device, and the fertilizer amount to be fertilized by the fertilizer is desired. Thus, it is possible to provide a seedling transplanter equipped with a fertilizer amount adjusting device that can be adjusted as described above.

FIG. 1 is a schematic left side view of a seedling transplanter according to a preferred embodiment of the present invention. FIG. 2 is a schematic plan view of the seedling transplanter shown in FIG. FIG. 3 is a schematic left side view showing details of the fertilizer application apparatus. FIG. 4 is a schematic cross-sectional view of the fertilizer hopper and the feeding case in the vicinity of the shutter. FIG. 5 is a schematic perspective view of a shutter mechanism including a shutter. FIG. 6 is a schematic plan view of the vicinity of the blower. FIG. 7 is a block diagram showing a control system, a detection system and a drive system of a fertilizer application device for a seedling transplanter according to a preferred embodiment of the present invention. FIG. 8 is a flowchart of fertilizer application amount control executed by the fertilizer application of the seedling transplanter according to a preferred embodiment of the present invention. FIG. 9 is a flowchart of fertilizer application amount control executed by the fertilizer application of the seedling transplanter according to another preferred embodiment of the present invention. FIG. 10 is a schematic left side view showing details of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention. FIG. 11 is a block diagram showing a control system, a detection system and a drive system of the fertilizer application device of the seedling transplanter according to another preferred embodiment of the present invention shown in FIG. FIG. 12 is a schematic vertical sectional view showing details of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention. FIG. 13 is a block diagram showing a control system, a detection system, and a drive system of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention shown in FIG. FIG. 14 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention. FIG. 15 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention. FIG. 16 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention. FIG. 17 is a schematic longitudinal sectional view of the vicinity of a grooving device of a fertilizer applicator of a seedling transplanter according to still another preferred embodiment of the present invention. FIG. 18 is a block diagram illustrating a method for processing a fertilizer detection signal of a missing particle sensor.

  FIG. 1 is a schematic left side view of a seedling transplanter according to a preferred embodiment of the present invention, and FIG. 2 is a schematic plan view thereof.

  As shown in FIG. 1 and FIG. 2, the seedling transplanting machine 1 according to this embodiment is mounted on the rear side of the traveling vehicle body 2 through a lifting link device 3 so that the seedling planting part 4 can be lifted and lowered. A main body portion of the fertilizer application device 5 is provided on the rear upper side of the traveling vehicle body 2.

  The traveling vehicle body 2 is a four-wheel drive vehicle provided with a pair of left and right front wheels 10 and 10 and rear wheels 11 and 11 as drive wheels, and a transmission case 12 is disposed at the front of the fuselage. Front wheel final cases 13 and 13 are provided on the left-right side, and front wheels 10 and 10 are attached to a front wheel axle that protrudes outward from a front wheel support portion capable of turning the front wheel final cases 13 and 13.

  Further, the front end portion of the main frame 15 is fixed to the rear portion of the transmission case 12, and the rear wheel gear case 18, with the rear wheel rolling shaft provided horizontally in the front and rear sides at the rear left and right center of the main frame 15 as a fulcrum, The rear wheels 11 and 11 are attached to a rear wheel axle that is supported in a freely rolling manner and projects outwardly from the rear wheel gear cases 18 and 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine is transmitted to the transmission case 12 via the first belt transmission device 21 and the second belt transmission device 23. The rotational power transmitted to the mission case 12 is shifted by a transmission (transmission: not shown in FIGS. 1 and 2) in the mission case 12, and then separated into traveling power and external power to be taken out. It is.

  A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. Further, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling vehicle body 2, and is then transmitted to the seedling planting unit 4 by a planting transmission shaft 26 and is also applied by the fertilizer transmission mechanism 27. It is transmitted to the device 5.

  The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a steering wheel 34 for steering the front wheels 10 and 10 is provided above the front cover 32. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on the left and right sides of the lower end. A rear step 36 that also serves as a rear wheel fender is provided at the rear of the floor step 35. Further, on both the left and right sides of the front part of the traveling vehicle body 2, the spare seedling platforms 38, 38 on which the replenishment seedlings are placed can be pivoted to a position projecting laterally from the machine body and a position housed inside. Is provided.

  The elevating link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing.

  A connecting shaft 44 that is rotatably supported by the seedling planting portion 4 is inserted and connected to the lower end portion of the vertical link 43, and the seedling planting portion 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between the support member fixed to the main frame 15 and the tip of the swing arm 45 integrally formed with the upper link 40. The link 40 rotates up and down, and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  The seedling planting section 4 has a six-row planting structure. A transmission case 50 that also serves as a frame and a mat seedling are placed to reciprocate left and right, and the seedlings are fed one by one to the seedling outlet 58 of each seedling receiving plate 58 At the same time, the seedling mount 51 provided with a seedling feeding belt for supplying all the seedlings for one horizontal row to the lower seedling receiving plate 58, and the seedlings supplied to the seedling outlet are planted in the field by the seedling planting tool 52a. A seedling planting device 52 to be attached, and a pair of left and right drawing markers 53, 53 for drawing the aircraft path in the next process to the topsoil surface. In the lower part of the seedling planting part 4, a center float 55 is provided in the center, and side floats 56, 56 are provided on the left and right sides thereof.

  If these floats 55, 56, 56 are in contact with the mud surface of the field and the aircraft is advanced, the float slides while leveling the mud surface, and the seedling planting device 52 ... Planted. Each of the floats 55, 56, and 56 is pivotally attached so that the front end side moves up and down according to the unevenness of the soil surface of the field. During seedling planting work, the front float of the center float 55 is moved up and down. A hydraulic valve that is detected by the vertical movement detection mechanism 57, the detection result is input to a control device (not shown in FIGS. 1 and 2), and the raising / lowering hydraulic cylinder 46 is controlled by the seedling raising / lowering means. By switching (not shown in FIGS. 1 and 2) and raising and lowering the seedling planting unit 4, the seedling planting depth is always maintained constant.

The fertilizer applicator 5 feeds the granular fertilizer stored in each of the six fertilizer hoppers 60 by a fixed amount by each feeding case 61, and feeds the fed fertilizer to a connecting pipe (not shown in FIGS. 1 and 2). And fertilizer hose 70, and the fertilizer guide 63 attached to the left and right sides of the floats 55, 56, 56 is guided to the fertilizer guide 63. It is comprised so that the fertilizer formed in the side part vicinity may be dropped in the fertilization groove | channel which osmose | permeates a farm field .

  Although not shown, the groove body 64 is provided with a supply detection sensor for detecting whether or not fertilizer is supplied. When the supply detection sensor does not detect the supply of fertilizer, the wheels 10 and 11 are connected. The traveling vehicle body 2 is configured not to be allowed to move forward by locking or the like.

  Further, air generated by the blower 67 driven by the electric motor 66 is blown into each connection pipe via the air chamber 68 that is long in the left-right direction, and the fertilizer in each connection pipe is directed toward each fertilization guide 63. It is configured to forcibly convey with wind pressure via the fertilizer hose 70. Here, the electric motor 66 for driving the blower 67 is configured to be activated and stopped by an on / off operation of a blower switch SW1 provided in an operation panel portion disposed below the steering wheel 34. . That is, when the blower switch SW1 is set to the ON position, the electric motor operating means of the control device (not shown in FIGS. 1 and 2) energizes the electric motor 66, and the electric motor 66 rotates to turn the blower 67 off. Operate. When the blower switch SW1 is set to the off position, the electric motor operating means of the control device cuts off the power supply to the electric motor 66, the electric motor 66 stops rotating, and the blower 67 also stops operating.

  FIG. 3 is a schematic left side view showing details of the fertilizer application device 5.

  The fertilizer applicator 5 is provided with a total of six removable fertilizer hoppers 60 for storing fertilizer in the upper part for each strip. The fertilizer hopper 60 is provided with a lid member 60 a that is opened when the fertilizer is stored in the fertilizer hopper 60.

  As shown in FIG. 3, a fertilizer discharge port 100 is formed in the lower portion of each fertilizer hopper 60, and a feeding case 61 is provided near the lower portion of the fertilizer discharge port 100. The feeding case 61 is provided with a feeding roll 101 that receives fertilizer falling from the fertilizer outlet 100 and feeds the fertilizer, and a feeding shaft 102 that rotatably supports the feeding roll 101, and opens and closes the fertilizer outlet 100. A shutter 110 is provided.

  As shown in FIG. 3, a fertilizer supply port 103 is formed in the lower part of the feeding case 61, and the fertilizer supply port 103 is opened in a connecting pipe 62 that extends in the front-rear direction.

  The rear end of the connecting pipe 62 is connected to one end of a fertilizer hose 70 having a spiral groove formed on the outer periphery. The front end of the connecting pipe 62 opens into the air chamber 68, and the opening of the connecting pipe 62 A disk-shaped lid member 130 is slidably disposed on 62a, and the opening 62a is opened and closed by sliding the lid member 130.

  Although not shown, all the connection pipes 62 of the six fertilizer hoppers 60 are opened in the air chamber 68.

  In FIG. 3, what is indicated by reference numeral 128 is a fertilizer recovery pipe for discharging and recovering fertilizer out of the machine, and the fertilizer recovery pipes 128 for discharging fertilizer from each fertilizer hopper 60 communicate with each other. .

  In the present embodiment, by operating a switching operation lever (not shown), the operation mode of the fertilizer application device 5 is changed so that the fertilizer stored in the fertilizer hopper 60 is transferred to the fertilizer hose 70 via the connection pipe 62. The fertilizer supply mode and the fertilizer stored in the fertilizer hopper 60 can be selectively switched between the fertilizer recovery mode in which the fertilizer stored in the fertilizer hopper 60 is recovered outside the machine via the fertilizer recovery pipe 128. .

  Although not shown, the other end of the fertilizer hose 70 and a fertilizer guide 63... For forming a fertilizer groove (not shown) in the vicinity of the seedling planting position by the seedling planting section 4 are floats 55. , 56, 56.

  A rotational force of a drive shaft (not shown) of the rear wheel gear cases 18 and 18 is transmitted to a feed shaft 102 that rotatably supports the feed roll 101 via a drive force transmission member (not shown) and a gear 122. The feeding shaft 102 is configured to be rotatable at a fixed interlocking ratio with respect to the rotation of the front wheels 10 and 10 and the rear wheels 11 and 11.

  A plurality of feeding grooves 101 a are formed in the feeding roll 101, and the feeding roll 101 receives and stores the fertilizer in the feeding groove 101 a from the fertilizer hopper 60 through the fertilizer discharge port 100. Along with the rotation, the fertilizer accommodated in the feeding groove 101 a is configured to be supplied to the connection pipe 62 through the fertilizer supply port 103.

  FIG. 4 is a schematic cross-sectional view of the fertilizer hopper 60 and the feeding case 61 in the vicinity of the shutter 110, and FIG. 5 is a schematic perspective view of a shutter mechanism including the shutter 110.

  As shown in FIGS. 4 and 5, the shutter mechanism 150 includes a rectangular parallelepiped frame 151, a fertilizer discharge port 100 that is long in the front-rear direction formed on the bottom surface of the frame 151, and a front wall 151 a of the frame 151. And a slit 152b formed in the rear wall 151b of the frame 151.

  As shown in FIGS. 4 and 5, the shutter 110 has a flat plate shape and is configured to be slidable in the front-rear direction through the slits 152 a and 152 b formed in the frame body 151.

  The slit 110 is formed with an opening 111 that is larger than the fertilizer outlet 100 and is long in the front-rear direction.

The shutter 110 is configured to be slidable by a shutter driving member ( not shown).

  At the front end portion of the shutter 110, a grip portion 116 that can be gripped by an operator is formed, and the flat plate portion 112 is provided with a screw portion 115 protruding upward immediately after the opening portion 111.

As described above, the shutter 110 is configured to be slidable by the shutter driving member . However, when the manual mode is set, the gripper 116 can be gripped and slid by the operator.

  As shown in FIGS. 4 and 5, the shutter 110 is slid to the rear side (right side in FIGS. 4 and 5) indicated by the arrow B, and the fertilizer discharge port 100 is opened by the opening 111 of the shutter 110. When fully opened, the screw portion 115 formed on the shutter 110 abuts against the rear wall 151b of the frame 151, and the shutter 110 cannot be moved further rearward.

  On the other hand, when the shutter 110 is slid to the front side (left side in FIGS. 4 and 5) indicated by the arrow A and the screw portion 115 contacts the front wall 151 a of the frame body 151, the flat plate portion 112 of the shutter 110. Thus, the fertilizer discharge port 100 is completely closed, and the communication between the fertilizer hopper 60 and the inside of the feeding case 61 is blocked.

Therefore, at the time of fertilization work, the shutter 110 is moved by the shutter driving member or by the operator, and the shutter 110 is located at the position where the opening 111 of the shutter 110 includes the fertilizer discharge port 100 in FIGS. Until the fertilizer discharge port 100 is opened and the screw portion 115 contacts the rear wall 151b of the frame 151, the shutter 110 is moved further to the right. The shutter 110 stops in a state where the fertilizer discharge port 100 is opened.

On the other hand, when the fertilization operation is stopped, the shutter 110 is moved to the left side (front side) indicated by the arrow A in FIGS. 4 and 5 by the shutter driving member or by the operator, and the flat plate portion of the shutter 110. When the fertilizer discharge port 100 is closed by 112 and the screw portion 115 contacts the front wall 151a of the frame 151, the fertilizer discharge port 100 is completely closed by the flat plate portion 112 of the shutter 110, and the shutter 110 stops. .

  FIG. 6 is a schematic plan view near the blower 67.

  As shown in FIG. 6, the air chamber 68 in which the connection pipe 62 of each fertilizer chamber 60 opens and the fertilizer recovery pipe 128 that discharges the fertilizer from each fertilizer chamber 60 are joined together by an air switching pipe 135. 135 is connected to the blower 67. In the air switching pipe 135, an air switching shutter 86 for selectively connecting the air chamber 68 and the fertilizer recovery pipe 128 to the blower 67 is provided.

  As described above, in this embodiment, the fertilizer that supplies the fertilizer stored in the fertilizer hopper 60 to the fertilizer hose 70 through the connection pipe 62 by operating a switching operation lever (not shown). The mode and the fertilizer collection mode for collecting the fertilizer stored in the fertilizer hopper 60 to the outside of the machine via the fertilizer collection pipe 128 can be selectively switched.

  When the fertilizer stored in the fertilizer hopper 60 is supplied to the fertilizer hose 70 via the connection pipe 62 by the switching operation lever, the air chamber 68 and the blower 67 are communicated with each other. The air switching shutter 86 is switched, and the air generated by the blower 67 driven by the electric motor 66 is blown into each connecting pipe 62 via the air chamber 68 as described above, The fertilizer is forcibly conveyed by wind pressure through the fertilization hose 70 toward each fertilization guide 63.

On the other hand, when the fertilizer recovery mode in which the fertilizer stored in the fertilizer hopper 60 is recovered to the outside through the fertilizer recovery pipe 128 by the switching operation lever is selected, the fertilizer recovery pipe 128 and the blower 67 are The air switching shutter 86 is switched so as to communicate. When the switching operation lever is switched to the fertilizer recovery mode, a shutter driving member (not shown) is operated. At first, the shutter 110 is partially opened, and when the switching to the fertilizer recovery mode of the switching operation lever is completed, the shutter 110 is completed. Is fully opened.

  As a result, the air generated by the blower 67 driven by the electric motor 66 is supplied to the fertilizer collecting pipe 128, and the fertilizer in the fertilizer collecting pipe 128 is discharged outside and is collected.

  Here, when the switching operation lever is switched to the fertilizer recovery mode, the shutter 110 is initially configured to be partially opened when the switching operation lever is switched to the fertilizer recovery mode. This is to prevent the fertilizer stored in the tank from falling into the feeding case 61 at once and clogging the fertilizer recovery pipe 128 and interrupting the fertilizer recovery work, and switching to the fertilizer recovery mode of the switching operation lever is complete. Then, the reason why the shutter 110 is configured to be fully opened is to improve work efficiency.

  FIG. 7 is a block diagram showing a control system, a detection system, and a drive system of the fertilizer application device 5 of the seedling transplanter according to a preferred embodiment of the present invention.

  As shown in FIG. 7, the control system of the fertilizer application device 5 includes a controller 300 that controls the overall operation of the fertilizer application device 5, a ROM 301 that stores a control program for the fertilizer application device 5, and a RAM 302 that stores various data. Yes.

As shown in FIG. 7, the detection system of the fertilizer application device 5 detects a water temperature of the field of the front wheel portion and outputs a water temperature detection signal indicating a detected value of the water temperature of the field of the front wheel portion to the controller 300. detects the field of depth of the front wheel portion, a depth sensor 306 for outputting a water depth detection signal indicating the detection value of the field of depth of the front wheel portion to the controller 300, detects a load applied to the fertilizer transmission mechanism 27, the load detection A load sensor 307 that outputs a signal to the controller 300 is provided.

As shown in FIG. 7, the drive system of the fertilizer application device 5 includes a transmission 310, output control means (HST servo motor) 312 that increases or decreases the output of the transmission 310, and a feed roller drive motor that rotates the feed roller 101. 314, a shutter driving member 316 that drives the shutter 110, and a fertilizer application amount adjusting device 318 that controls the feeding roller driving motor 314 and the shutter driving member 316.

The first memory area of the RAM 302 stores the fertilizer application amount Q0 at each time point supplied to the field of the front wheel portion, and the water temperature detection detected by the water temperature sensor 305 is stored in the second memory area of the RAM 302. Data, water depth detection data detected by the water depth sensor 306 and load detection data detected by the load sensor 307 are stored. Further, in the third memory area of the RAM 302, a table that defines how the fertilization amount should be set based on the water temperature detection data, and a table that defines how the fertilization amount should be set based on the water depth detection data. And a table that defines how the fertilization amount should be set based on the load detection data.

Further, the fourth memory area of the RAM 302 stores a threshold value ΔQth used for determining whether or not the amount of fertilizer applied to the field has changed significantly.

  FIG. 8 is a flowchart of fertilizer application amount control executed by the fertilizer application device 5 of the seedling transplanter according to a preferred embodiment of the present invention configured as described above.

  First, water temperature detection data detected by the water temperature sensor 305, water depth detection data detected by the water temperature sensor 305, and load detection data detected by the load sensor 307 are input to the controller 300 (step S1).

The controller 300 stores the input water temperature detection data, water depth detection data, and load detection data in the second memory area of the RAM 302, and uses the fertilizer application amount based on the water temperature detection data stored in the third memory area of the RAM 302. Stipulated how to set the fertilization amount by the table that defined how to set the fertilizer amount, the table that determined how the fertilizer amount should be set by the water depth detection data, and the load detection data Based on the table, the fertilizer application amount Q of the fertilizer to be applied to the field is calculated (step S2).

Next, the controller 300 calculates the absolute value of the difference between the fertilizer application amount Q of the fertilizer to be applied to the field thus calculated and the fertilizer application amount Q0 currently applied to the field stored in the first memory area of the RAM 302. Q−Q0 | is obtained and compared with a threshold value ΔQth stored in the fourth memory area of the RAM 302 (step S3).

As a result, when the absolute value | Q−Q0 | is less than the threshold value ΔQth, the controller 300 causes the feeding roller drive motor 314 and the shutter to be fertilized with the calculated fertilizer amount Q. The drive member 316 is controlled (step S4).

On the other hand, when the absolute value | Q−Q0 | is equal to or greater than the threshold value ΔQth, if the fertilizer with the fertilizer application amount Q is supplied to the dredging field as it is, an overload is applied to the fertilizer transmission mechanism 27, and the fertilizer transmission mechanism 27, the fertilizer transmission mechanism 27 may be damaged in some cases. Therefore, the controller 300 outputs an output decrease signal to the output control means (HST servo motor) 312 and the transmission 310 Is reduced (step S5).

  As a result, the vehicle speed is reduced, and the transmission speed at which the fertilization transmission mechanism 27 transmits the transmission power to the fertilizer application device 5 is reduced. Therefore, it is possible to effectively prevent the fertilization transmission mechanism 27 from being overloaded. Become.

  FIG. 9 is a flowchart of fertilizer application amount control executed by the fertilizer application apparatus 5 of the seedling transplanter according to another preferred embodiment of the present invention.

  First, water temperature detection data, water depth detection data, and load detection data are each input to the controller 300 (step SS1).

Next, similarly to the embodiment, the controller 300 calculates the fertilizer application amount Q of the fertilizer to be applied to the field (step SS2).

Thereafter, the controller 300 calculates the absolute value of the difference between the fertilizer application amount Q to be applied to the field thus calculated and the fertilizer application amount Q0 currently applied to the field stored in the first memory area of the RAM 302. Q−Q0 | is obtained and compared with the threshold value ΔQth stored in the fourth memory area of the RAM 302 (step SS3).

As a result, when the absolute value | Q−Q0 | is less than the threshold value ΔQth, the controller 300 drives the feeding roller drive motor 314 and the shutter so that the fertilizer of the calculated fertilizer application amount Q is applied to the field. The member 316 is controlled (step SS4).

On the other hand, when the absolute value | Q−Q0 | is equal to or greater than the threshold value ΔQth, if the fertilizer with the fertilizer application amount Q is supplied to the dredging field as it is, an overload is applied to the fertilizer transmission mechanism 27, and the fertilizer transmission mechanism Since the fertilizer transmission mechanism 27 may be damaged in some cases, the controller 300 outputs a drive signal to the fertilizer application amount adjusting device 318 and outputs an operation time extension signal ( Step SS5).

As a result, the time during which the feed roller drive motor 314 and the shutter drive member 316 are driven by the fertilizer application amount adjusting device 318 is extended, and the change in the amount of fertilizer applied from the fertilizer hopper 60 to the field is moderated. It is possible to effectively prevent the mechanism 27 from being overloaded.

  FIG. 10 is a schematic longitudinal sectional view in the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention.

  As shown in FIG. 10, in this embodiment, a net member 400 is provided above the fertilizer discharge port 100 inside each fertilizer hopper 60. As will be described later, the mesh member 400 is configured to move substantially horizontally in the left-right direction in FIG. 10, and therefore between the end portions 410, 411 of the mesh member 400 in the left-right direction and the inner wall 420 of the fertilizer hopper 60. Is provided with a gap 425.

  FIG. 11 is a block diagram showing a control system, a detection system and a drive system of the fertilizer application device of the seedling transplanter according to another preferred embodiment of the present invention shown in FIG.

  As shown in FIG. 11, the control system of the fertilizer application device 5 includes a controller 300 that controls the overall operation of the fertilizer application device 5, a ROM 301 that stores a control program for the fertilizer application device 5, and a RAM 302 that stores various data. Yes.

As shown in FIG. 11, the detection system of the fertilizer applicator 5 detects a water temperature of the field of the front wheel portion, and outputs a water temperature detection signal indicating a detected value of the water temperature of the field of the front wheel portion to the controller 300. detects the field of depth of the front wheel portion, a depth sensor 306 for outputting a water depth detection signal indicating the detection value of the field of depth of the front wheel portion to the controller 300, detects a load applied to the fertilizer transmission mechanism 27, the load detection A load sensor 307 that outputs a signal to the controller 300 is provided.

As shown in FIG. 11, the drive system of the fertilizer application device 5 includes a transmission 310, output control means (HST servo motor) 312 that increases or decreases the output of the transmission 310, and a feed roller drive motor that rotates the feed roller 101. 314, a shutter driving member 316 that drives the shutter 110, a fertilizer application adjusting device 318 that controls the feeding roller driving motor 314 and the shutter driving member 316, and a motor 430 that moves the net member 400 substantially horizontally in the left-right direction in FIG. It has.

Also in this embodiment, the absolute value of the difference between the fertilizer application amount Q to be applied to the field by the controller 300 and the fertilizer application amount Q0 currently applied to the field stored in the first memory area of the RAM 302. | Q−Q0 | is obtained and compared with the threshold value ΔQth stored in the fourth memory area of the RAM 302.

As a result, when the absolute value | Q−Q0 | is equal to or less than the threshold value ΔQth, the controller 300 causes the feeding roller drive motor 314 and the shutter drive so that the fertilizer of the calculated fertilizer application amount Q is applied to the field. The member 316 is controlled.

On the other hand, when the absolute value | Q−Q0 | exceeds the threshold value ΔQth, if a fertilizer with a fertilizer amount Q is supplied to the dredging field as it is, an overload is applied to the fertilizer transmission mechanism 27 and the fertilizer transmission Since the durability of the mechanism 27 is reduced and the fertilizer transmission mechanism 27 may be damaged in some cases, the controller 300 outputs a drive signal to the motor 430 to move the mesh member 400 in the left-right direction in FIG. Moved approximately horizontally.

  As a result, the fertilizer falls gradually from the fertilizer hopper 60 through the net member 400 into the feeding case 61, and therefore, it is possible to effectively prevent the fertilizer transmission mechanism 27 from being overloaded. It becomes possible.

  FIG. 12 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention.

  As shown in FIG. 12, also in this embodiment, a net member 450 is provided above the fertilizer discharge port 100 inside each fertilizer hopper 60. As will be described later, since the mesh member 450 is configured to be moved up and down in FIG. 12, the left and right ends 460 and 461 of the mesh member 450 are positioned in the vicinity of the inner wall 420 of the fertilizer hopper 60. .

  FIG. 13 is a block diagram showing a control system, a detection system, and a drive system of a fertilizer application device for a seedling transplanter according to another preferred embodiment of the present invention shown in FIG.

  As shown in FIG. 13, the control system of the fertilizer application device 5 includes a controller 300 that controls the overall operation of the fertilizer application device 5, a ROM 301 that stores a control program for the fertilizer application device 5, and a RAM 302 that stores various data. Yes.

As shown in FIG. 13, the detection system of the fertilizer application device 5 detects a water temperature of the field of the front wheel portion and outputs a water temperature detection signal indicating a detected value of the water temperature of the field of the front wheel portion to the controller 300. detects the field of depth of the front wheel portion, a depth sensor 306 for outputting a water depth detection signal indicating the detection value of the field of depth of the front wheel portion to the controller 300, detects a load applied to the fertilizer transmission mechanism 27, the load detection A load sensor 307 that outputs a signal to the controller 300 is provided.

As shown in FIG. 13, the drive system of the fertilizer application device 5 includes a transmission 310, output control means (HST servo motor) 312 that increases or decreases the output of the transmission 310, and a feed roller drive motor that rotates the feed roller 101. 314, a shutter driving member 316 that drives the shutter 110, a fertilizer application amount adjusting device 318 that controls the feeding roller driving motor 314 and the shutter driving member 316, and a vertical movement motor 480 that moves the net member 450 up and down.

Also in this embodiment, the absolute value of the difference between the fertilizer application amount Q to be applied to the field by the controller 300 and the fertilizer application amount Q0 currently applied to the field stored in the first memory area of the RAM 302. | Q−Q0 | is obtained and compared with the threshold value ΔQth stored in the fourth memory area of the RAM 302.

As a result, when the absolute value | Q−Q0 | is equal to or less than the threshold value ΔQth, the controller 300 causes the feeding roller drive motor 314 and the shutter drive so that the fertilizer of the calculated fertilizer application amount Q is applied to the field. The member 316 is controlled.

On the other hand, when the absolute value | Q−Q0 | exceeds the threshold value ΔQth, if a fertilizer with a fertilizer amount Q is supplied to the dredging field as it is, an overload is applied to the fertilizer transmission mechanism 27 and the fertilizer transmission Since the durability of the mechanism 27 is lowered and the fertilization transmission mechanism 27 may be damaged in some cases, the controller 300 outputs a drive signal to the vertical movement motor 480 to move the mesh member 450 up and down.

  As a result, the fertilizer is gradually dropped from the fertilizer hopper 60 through the net member 450 into the feeding case 61, and therefore, it is possible to effectively prevent the fertilizer transmission mechanism 27 from being overloaded. It becomes possible.

  FIG. 14 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention.

  As shown in FIG. 14, in this embodiment, the lid member 60 a of the fertilizer hopper 60 is attached so as to be swingable around a swing shaft 500 provided at the rear end portion of the fertilizer hopper 60. When the lid member 60a is closed, the distal end portion of the rotating rod 501 is attached to the rear end portion of the lid member 60a located behind the swing shaft 500, and the lower end portion of the rotating rod 501 and the net member 400 are attached. The rear end portion 400 a is connected to the rotary link arm 502.

  Therefore, according to this embodiment, when the lid member 60a of the fertilizer hopper 60 is swung around the swing shaft 500 for the purpose of replenishing the fertilizer hopper 60 with fertilizer, the net member 400 moves back and forth. As a result, the fertilizer can be prevented from becoming a lump by its own weight, and the fertilizer can be maintained in a state of being easily dropped.

  FIG. 15 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention.

  As shown in FIG. 15, in the present embodiment, a movable net member 510 is placed on the upper part of the net member 400 whose position is fixed in the fertilizer hopper 60 of the fertilizer application apparatus 5. . Also in this embodiment, the lid member 63a of the fertilizer hopper 60 is provided around the swing shaft 500 provided at the rear end portion of the fertilizer hopper 60 in the same manner as the fertilizer hopper of the fertilizer application of the seedling transplanter shown in FIG. When the lid member 60a is closed, the tip of the pivot rod 501 is attached to the rear end of the lid member 60a located behind the pivot shaft 500 when the lid member 60a is closed. The lower end portion of 501 and the rear end portion 510 a of the movable net member 510 are connected by a rotation link arm 502.

  Therefore, according to the present embodiment, when the lid member 60a of the fertilizer hopper 60 is swung around the swing shaft 500 for the purpose of replenishing the fertilizer hopper 60 with fertilizer, the net member 510 moves back and forth. As a result, the opening of the net member 400 and the opening of the movable net member 510 overlap, and the fertilizer placed on the upper surface of the net member 510 can be dropped as desired. .

  FIG. 16 is a schematic longitudinal sectional view of the vicinity of a fertilizer hopper of a fertilizer application device for a seedling transplanter according to still another preferred embodiment of the present invention.

  As shown in FIG. 16, in this embodiment, the mesh member 400 is configured to be movable, and the upper link 40 of the lift link device 3 and the rear end portion of the movable mesh member 400 are connected to the rotary link arm 502. And connected by a wire 512.

  Therefore, according to this embodiment, the mesh member 400 is moved in the front-rear direction in conjunction with the lifting operation of the lifting link device 3, and as a result, the fertilizer placed on the upper surface of the mesh member 400 is deadweight. It is prevented from becoming a lump and can be dropped as desired.

  FIG. 17 is a schematic longitudinal cross-sectional view of the vicinity of the grooving device 64 of the fertilizer application of the seedling transplanter according to still another preferred embodiment of the present invention.

  As shown in FIG. 17, in this embodiment, the lack of detecting whether or not the fertilizer application guide 63 of the fertilizer supplied from the fertilizer application 5 has passed between the fertilizer hose 70 and the fertilizer outlet 530 of the fertilizer application device 5 is missing. A grain sensor 540 is provided.

  FIG. 18 is a block diagram showing a method for processing a fertilizer detection signal of the missing particle sensor 540.

  As shown in FIG. 18, the fertilizer detection signal of the missing particle sensor 540 is input to the controller 300. When the fertilizer detection signal is not input from the missing particle sensor 540, the controller 300 stops the operation of the output control means 312 for changing the output of the transmission 310, and the fertilizer detection signal is input from the missing particle sensor 540. For the first time, the operation of the output control means 312 is allowed and the output of the transmission 310 is changed.

Since the fertilizer delivered from the fertilizer is moved via the fertilizer hose 62, it takes a certain amount of time to pass through the fertilizer guide 63 and be supplied to the field . Conventionally, the fertilizer 5 is activated. At the same time, since a signal for changing the output is output from the output control means 312 to the transmission 310, the planting device starts planting seedlings and the traveling vehicle body 2 When traveling starts and therefore fertilizer is supplied to the field , the traveling vehicle body 2 has already moved forward, so no fertilizer is supplied to the seedlings near the beginning of planting, and growth is delayed only by that portion due to the lack of fertilizer. There's a problem.

However, according to the present embodiment, since the fertilizer is detected by the missing particle sensor 540 and the fertilizer arrives at the field , the planting of the seedling and the advance of the traveling vehicle 2 are started, so the fertilizer is supplied to the seedling at the beginning of planting. Therefore, it is possible to align the growth of seedlings throughout the field .

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Traveling vehicle body 3 Lifting link device 4 Seedling planting part 5 Fertilizer 10 Front wheel 11 Rear wheel 12 Mission case 13 Front wheel final case 15 Main frame 18 Rear wheel gear case 21 First belt transmission device 23 Second belt transmission device 25 Planting clutch case 26 Planting transmission shaft 27 Fertilization transmission mechanism 30 Engine cover 31 Seat 32 Front cover 34 Steering wheel 35 Floor step 36 Rear step 38 Spare seedling stage 40 Upper link 41 Lower link 42 Link base frame 43 Vertical link 44 Connecting shaft 45 Swing arm 46 Elevating hydraulic cylinder 50 Transmission case 51 Seedling stage 51a Seedling outlet 51b Seedling feeding belt 52 Seedling planting device 52a Seedling planting tool 53 Drawing marker 55 Center float 56 Side float 58 Seedling plate 60 Fertilizer hopper 60a Lid member 61 Feeding case 62 Connection pipe 62a Opening 63 Fertilization guide 64 Grooving body 66 Electric motor 67 Blower 68 Air chamber 70 Fertilization hose 100 Fertilizer discharge port 101 Feeding roll 101a Feeding groove 102 Feeding shaft 103 Fertilizer supply port 110 Shutter 111 Opening part 112 Flat plate part 115 Screw part 116 Holding part 122 Gear 128 Fertilizer collection pipe 130 Cover member 150 Shutter mechanism 151 Frame 151a Front wall 151b Rear wall 152a, 152b Slit 300 Controller 301 ROM
302 RAM
305 Water temperature sensor 306 Water depth sensor 307 Load sensor 310 Transmission 312 Output control means (HST servo motor)
314 Feed roller driving motor 316 Shutter driving member 318 Fertilization amount adjustment device 400 Net member 410, 411 End of left and right direction of net member 420 Inner wall of fertilizer hopper 425 Gap part 430 Motor 450 Net member 460, 461 Horizontal direction of net member End 480 Vertical motion motor 500 Oscillating shaft 501 Rotating rod 502 Rotating link arm 510 Movable net member 510a Net member rear end 512 Wire 530 Fertilizer outlet 540 Missing grain sensor

Claims (5)

A transmission, an output control member that increases or decreases the output of the transmission, a seedling planting portion provided at the rear of the traveling vehicle body, a fertilizer that supplies fertilizer to the dredging field, and a fertilizer amount that is supplied by the fertilizer Based on the condition of the fertilizer applied to the fertilizer, the detection member for detecting the condition of the fertilizer to be changed, the condition of the fertilizer detected by the detection member, and calculating the fertilizer amount to be supplied by the fertilizer Comprising control means for controlling the fertilizer application control device;
The fertilizer is disposed between the fertilizer hopper and the feeding device, the fertilizer hopper for storing the fertilizer, the feeding device for feeding the fertilizer falling from the fertilizer hopper by a predetermined amount, and the fertilizer hopper and the feeding device. In a seedling transplanting machine provided with a shutter capable of controlling communication between and a shutter driving member for opening and closing the shutter,
Based on the condition of the fertilizer applied by the detection member, the control means calculates the fertilizer amount Q to be supplied by the fertilizer, and as a result, the current fertilizer amount Q0 and the fertilizer amount Q to be supplied by the fertilizer. When the absolute value | Q−Q0 | is equal to or greater than the threshold value ΔQth, the control means uses the absolute value of the difference between the current fertilizer application amount Q0 and the fertilizer application amount Q to be supplied by the fertilizer application device | Q-Q0 | than the time for driving the feeding device and the shutter drive member of the fertilizing device when it is less than the threshold value? Qth, the time for driving the feeding device and the shutter drive member of the fertilizing device A seedling transplanter characterized by being configured to be long. Fertilizer recovery mode in which the float disposed in the lower part of the seedling planting part, the fertilizer hose supplying fertilizer to the float from the fertilizer application apparatus, and the fertilizer stored in the fertilizer hopper is discharged out of the machine and recovered And a switching lever capable of switching the fertilizer stored in the fertilizer hopper to a fertilization mode to be supplied to the fertilization hose via a connecting pipe,
In the process of operating the switching lever to switch to the fertilizer recovery mode for recovering fertilizer, the shutter driving member is operated to partially open the shutter, and the switching lever is switched to the fertilizer recovery mode. The seedling transplanter according to claim 1, wherein the seedling transplanter is configured to operate the shutter driving member to open the shutter completely at a time point.   The supply detection sensor comprising: a grooving device that forms a groove for allowing the fertilizer discharged from the fertilizer hose to penetrate in a field; and a supply detection sensor that is attached to the grooving device to detect whether fertilizer is supplied. The seedling transplanter according to claim 2, wherein the seedling transplanter is configured not to allow the traveling vehicle body to move forward when the sensor does not detect the supply of fertilizer.   A net member is provided in the fertilizer hopper, a motor is provided for moving the net member substantially horizontally, and a change between the current fertilizer application amount and the fertilizer application amount calculated by the control means to be supplied by the fertilizer is greater than a threshold value. The seedling transplanter according to any one of claims 1 to 3, wherein the net member is substantially horizontally moved by the motor.   The fertilizer hopper includes a net member, and includes a vertical movement motor that moves the net member up and down, and the change between the current fertilizer application amount and the fertilizer application amount calculated by the control means to be supplied by the control unit is greater than or equal to a threshold value. The seedling transplanter according to any one of claims 1 to 3, wherein the net member is moved up and down by the up-and-down motor at a certain time.