JP3380702B2 - Fertilizer application structure of rice transplanter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a ground leveling float, which acts on a seedling planting site, on a float support arm extending from the machine body, and adjusts the float support arm vertically with respect to the machine body for leveling. In a rice transplanter in which a seedling planting device configured to change the planting depth by changing the mounting height of the float to the aircraft is connected to the traveling aircraft, fertilizer is buried in the field on the side of the planted seedlings. The present invention relates to a fertilizer application structure that enables fertilizing work.

[0002]

2. Description of the Related Art In the above rice planting machine, conventionally, as shown in, for example, Japanese Patent Application Laid-Open No. 8-266124, a fertilizer application nozzle is attached to a leveling float, and when performing seedling planting work, fertilizer is applied to the side of the planted seedlings. There was something that could be buried in the field. Also, in this case, even if the seedling planting depth is changed, the fertilizer application nozzle does not change the fertilizer application depth. For example, even if the seedling planting depth is adjusted to the shallow side, the fertilizer does not change the seedling planting depth. It was possible to perform fertilization work advantageously by allowing it to be buried so that it would not flow and move to the same depth as before the change.

[0003]

Generally, the ground leveling float is attached to the body of the seedling planting device so that it can be raised and lowered so that the seedling planting device can be controlled to move up and down with respect to the traveling body. Then, a fertilizing pump for supplying fertilizer to the fertilizing nozzle is attached to the body of the seedling planting device, and is connected to the fertilizing nozzle through a fertilizing hose. Therefore, conventionally, when the vehicle body of the seedling planting apparatus moves up and down with respect to the field scene due to the wheels of the traveling vehicle entering the recess of the tiller or climbing on the protrusion, the vehicle moves up and down with respect to the leveling float. Since the distance between the fertilizer application pump and the fertilizer application nozzle was changed, the fertilizer application hose was likely to be bent or deformed. The object of the present invention is to prevent the fertilization depth from changing even if the seedling planting depth is changed, or to prevent it from changing too much. An object of the present invention is to provide a fertilizer application structure capable of performing fertilizer application work while making it difficult for the hose to deform.

[0004]

The constitution, action and effect of the invention according to claim 1 are as follows.

[Structure] A ground leveling float that acts on the ground for planting seedlings is supported by a float support arm extending from the machine body, and the float support arm is vertically adjusted with respect to the machine body to attach the ground leveling float to the machine body. A fertilizer application structure for a rice transplanter in which a seedling planting device configured to change a seedling planting depth by changing a height is connected to a traveling machine body, and a planting seedling to be planted on a leveled site by the leveling float The fertilizer application nozzle for burying fertilizer on the side of the field is supported integrally with the float support arm or a member that rotates with the float support arm with respect to the machine body, and the float support arm swings and adjusts. Accordingly, the fertilizer discharge side of the fertilizer application nozzle is configured to move up and down in the same direction as the leveling float with respect to the machine body.

[Operation] When the float support arm is vertically adjusted with respect to the machine body, the base end side of the float support arm moves up and down together with the machine body with respect to the field with the connection point with the ground level float on the tip side as the center of rocking. The height of the aircraft with respect to the field changes and the depth of seedling planting also changes. At this time, the base end side of the fertilizer application nozzle moves up and down together with the machine to the field, but the base end side of the float support arm or the rotating member rotates relative to the machine body and the fertilizer application nozzle moves to the float support arm or the rotation. By rotating together with the member, the fertilizer discharge port side of the fertilizer application nozzle moves up and down to the side opposite to the base end side with respect to the machine body. As a result, even if the seedling planting depth changes, the depth at which the fertilizer discharge side of the fertilizer application nozzle is located in the field does not change, but even if it changes, the change is less than the seedling planting depth. You can change the seedling depth while doing so.

The fertilizer application nozzle is supported by the machine body of the seedling planting device via the float support arm. Even when the machine body moves up and down with respect to the field, it moves up and down together with the fertilizer application pump supported by the machine body, thereby applying the fertilizer application nozzle and the fertilizer application. Fertilizer is buried in the field while the fertilizer hose connecting to the pump is not deformed, such as bent or stretched, or it is hard to cause deformation.

Even if the traveling machine body tilts back and forth and the machine body of the seedling planting apparatus moves up and down with respect to the field scene, the fertilizer application nozzle is supported by the machine body and the interval between the fertilizer application nozzle and the fertilizer application pump does not change. The fertilizing hose connecting the fertilizing nozzle to the fertilizing pump can be fertilized while preventing the deformation such as bending or extension which has conventionally been caused by the change in the interval.

[Effect] Even if the planting depth is changed to a shallow planting side and the fertilizing depth is not adjusted, the fertilizing depth is set to a depth before or near the planting depth changing. The fertilizer can be applied advantageously, for example, by preventing fertilizer flow.
In addition, even if the raising and lowering control of the seedling planting device is performed, the fertilization hose connected to the fertilization nozzle is not deformed or is not easily deformed, and the fertilizer application can be advantageously performed for a long period of time.

The structure, operation, and effect of the invention according to claim 2 are as follows.

[Configuration] In the configuration of the invention according to claim 1, a center leveling float in which the leveling float is located at the center of the seedling planting device in the lateral direction of the machine body and acts as a leveling ground,
The fertilizer nozzle is a center fertilizer nozzle for burying fertilizer in the field on the side of the planting seedlings to the leveling site by the center leveling float, and with a side leveling float that acts on the side of the machine side than the center leveling float, A side fertilizing nozzle for burying fertilizer in the field is attached to the side leveling float on the side of the seedling to be planted on the leveling site by the side leveling float.

[Operation] In this seeder planting machine, a relatively large number of seedlings are planted by providing the center leveling float and the side leveling float. In addition, the seedling planting device is controlled to roll up and down in addition to being controlled up and down with respect to the traveling machine body.
Fertilization work can be performed while minimizing the number of deformed fertilizer application hoses and keeping the fertilizer application depth unchanged.

That is, when the rolling control of the traveling machine body of the seedling planting apparatus is performed, the machine body of the seedling planting apparatus rotates about the center side in the left-right direction as the rolling center, and the center side of the machine body is in the field scene. On the other hand, it does not go up and down, or even if it goes up and down, only a relatively small stroke goes up and down, and both ends move up and down over a relatively large stroke with respect to the field scene. The side fertilizer nozzle is located at the lateral end of the seedling planting device so as to supply fertilizer to the seedlings that are planted at the side leveling float by the side leveling float. It is located on the center side of the seedling planting device so as to supply fertilizer to the seedlings. For this reason, in the case of the side fertilizer nozzle, if it is supported on the machine side, it will be supported on the lateral end side thereof.Therefore, when the rolling control of the seedling planting device is performed, it is relatively large with respect to the field with respect to the field. Although it moves up and down over the stroke and the depth of entry into the field changes relatively, but because it is supported by the side leveling float, the rolling control of the seedling planting device is performed and the lateral end side of the machine is in the field scene. Even if it goes up and down, it will be located on the field side together with the side leveling float, and the depth of entry into the field will not change. Even if the rolling stroke of the seedling planting device is large and the side leveling float may rise on the machine, the float rising stroke will be smaller than the machine rising stroke and the side fertilizer nozzle will be moved to the field. The penetration depth of will change only a small amount. And since the center fertilizer nozzle is supported on the machine side, even if the rolling control of the seedling planting device is performed, the depth of entry of the center fertilizer nozzle into the field does not change or changes. Will change only a relatively small amount.

[Effect] Even when the raising and lowering control and the rolling control of the seedling planting device are performed, the fertilization depth becomes constant or almost constant for both the center side planted seedling and the lateral side planted seedling. Fertilization work can be performed in an accurate state and in an advantageous state in which the fertilization hose connected to the center fertilization nozzle is not easily deformed and lasts a long time.

The structure, operation, and effect of the invention according to claim 3 are as follows.

[Structure] In the structure of the invention according to claim 2, the front rising inclination angle of the side fertilization nozzle is set to be larger than the front rising inclination angle of the center fertilization nozzle.

[Operation] Since the side fertilizing nozzle is supported by the side leveling float, the contaminants are likely to flow around the side leveling float, bypassing the fertilizing nozzle and flowing. Since the center fertilizer nozzle is supported by the machine body, foreign matter is likely to hit the fertilizer nozzle. That is, the side fertilizer nozzle is in a state in which foreign substances are less likely to be caught than the center fertilizer nozzle. Therefore, while adopting a shorter side fertilizer nozzle than the center fertilizer nozzle, both center fertilizer nozzles and side fertilizer nozzles are prevented from catching foreign matters, while both fertilizer nozzles are viewed from the side of the machine to the planted seedlings. Fertilizer can be applied at the same place.

[Effect] While avoiding the occurrence of troubles such as mud pushing due to foreign matter being caught in the side fertilizer nozzle and the center fertilizer nozzle, the side fertilizer nozzle is relatively short and clogging with fertilizer is avoided. Fertilization work can be performed in an advantageous state such as less likely to occur.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a pair of right and left front and rear wheels 1 and 1 that can be freely driven and a pair of left and right rear wheels 2 and 2 that can be freely driven are self-propelled and the engine bonnet is A lift cylinder 4 is used to swing up and down at the rear of the traveling machine body including the spare seedling stand 3 located on both sides, the first fertilizer tank T1, the second fertilizer tank T2 located on the side of the driver's seat S, and the like. The seedling planting device 10 is connected to the seedling planting device 10 through the link mechanism 5 so as to be moved up and down, and power is transmitted from the traveling machine body to the seedling planting device 10 by the rotating shaft 6. The fertilizer pumps P1 to P5 located above the rear part of the machine body of the seedling planting device 10 and the pump cover K covering the fertilizer pumps P1 to P5 are provided, and the paste fertilizer from the fertilizer pumps P1 to P5 is used by the fertilizer nozzles 31 to 35 in the field. The seedling planting device 10 is provided with the fertilizer application device 30 to be supplied to the seedling planting device 10, so that the seedling planting mechanisms 11a, 11b, 11c of the seedling planting device 10 can be used to plant seedlings in the field, and at the same time as this seedling planting work, near the planted seedlings A rice transplanter with a riding-type fertilizer application is configured so that the fertilizer work for burying the paste fertilizer can be performed.

The seedling planting device 10 is constructed as shown in FIGS. That is, the first connecting link 15a, one end of which is connected to the left end of the traveling frame of the connecting frame 7 that is connected to the free end side of the link mechanism 5 for connecting the seedling planting device, the first connecting link 15a The main frame 16 to which the bracket portion 16a is connected to the other end side, the input case 17 connected to the first connecting link 15a together with the main frame 16 by connecting to the bracket portion 16a, and both ends of the main frame 16 The planting drive case 18 whose front end side is connected, and the transmission case 19 for transmitting power from the input case 17 to the pair of planting drive cases 18, 18 constitute a left side body part, and the connecting frame 7 is provided on the right side of the traveling machine body. The second connecting link 15b, one end of which is connected to the end, and the bracket portion 1 on the other end of the second connecting link 15a. a is connected to the main frame 16, an input case 17 is connected to the second connecting link 15b together with the main frame 16 by being connected to the bracket portion 16a, and front ends are connected to both ends of the main frame 16. The right drive part is constituted by each of the planting drive case 18 and the transmission case 19 for transmitting power from the input case 17 to the pair of planting drive cases 18, 18, and the right side airframe part, the left side airframe part, and the connecting frame. And 7 form a planting machine that is the body of the entire seedling planting device 10.

The seedling planting mechanism 11 is provided on both lateral sides of the rear end portions of the two planting drive cases 18, 18 of the left side body portion.
a and 11c are drivably attached, and the seedling planting mechanisms 11b and 11c are drivably attached to both lateral sides of the rear end portions of the two planting drive cases 18 and 18 of the right body part,
The seedling placing table 12 is slid over the seedling placing table guide rails 13 supported by the rear end side of all the planting drive cases 18 and the seedling placing table columns 22 standing on the bracket portions 16a of the left and right body parts. The first side ground leveling float 14a is supported below the left side body part, and the second side leveling float 14 is supported below the right side body part.
b and the center ground leveling float 14c are supported.

Each of the seedling planting mechanisms 11a to 11c comprises a rotating case C rotatably supported by a planting drive case 18, and a planting arm A rotatably attached to both ends of the rotating case C. As the rotating case C is driven,
While the pair of planting arms A and A revolve around the rotation axis of the rotating case C, the planting arm drive mechanism (not shown) installed in the rotating case C rotates about the rotating case C. One of the mat-shaped seedlings that rotates and the seedling planting claws provided on one planting arm A and the seedling planting claws provided on the other planting arm A are alternately placed on the seedling placing table 12. The block seedlings are cut and taken out, and they are brought into the mud portion of the field and planted.

The seedling table horizontal feed shaft 23 is rotatably supported by the input case 17 of the left body part, and one end side is engaged with the spiral groove of the seedling table horizontal feed shaft 23, and the lateral feed is carried out. The other end of the seedling table horizontal feed rod 24 reciprocally transferred by the shaft 23 is connected to the seedling table 12, and the seedling table 12 is interlocked with the seedling planting movements of the seedling planting mechanisms 11a to 11c. It is configured to be reciprocated along the guide rail 13.

As shown in FIGS. 2 and 8 to 11, a float support arm extending rearward from the one end of a float support shaft 70 formed of a cylindrical shaft rotatably attached to the lower side of the planting machine. A mounting bracket B, which is connected to the rear end side of the first side ground leveling float 14, is rotatably connected to an extending end portion of 29a about an axis L1 along the lateral direction of the float. An attachment that is connected to the rear end side of the second side leveling float 14 at the extended end of a part of the float support arms 29b of the plurality of float support arms 29b extending rearward from the other end side. The bracket B is rotatably connected about the same axis as the axis L1, and the center leveling float 14c is provided at the extending end of the other float supporting arm 29b of the plurality of float supporting arms 29b. The bracket B connected to the end side is rotatably connected around the same axis as the axis L1, and the float support shaft 70 is attached to the planting machine body by a planting depth adjusting lever (not shown) interlocking therewith. By adjusting the rotation of the float support arms 29a and 29b in the vertical direction with respect to the planting machine, the heights of the float support arms 29a and 29b can be adjusted up and down with respect to the planting machine to change the mounting height of the leveling floats 14a to 14c to the planting machine. The shaft L is configured to be adjustable, and at the adjusted mounting height, the front end side of each of the ground leveling floats 14a to 14c is the rear end side.
It is configured to swing up and down with respect to the planting machine body around one. An elevating control mechanism (not shown) including a rotary potentiometer (not shown) interlocked with vertical swing of the center leveling float 14c so as to detect the mounting posture of the center leveling float 14c with respect to the planting machine is provided in the traveling machine body. At the same time, the lifting control mechanism detects the height of the planting machine with respect to the mud surface of the field based on the detection result of the potentiometer, and automatically operates the lift cylinder 4 so that the detection result falls within the set range. Configured. That is, the ground support floats 14a are adjusted by vertically adjusting the float support arms 29a and 29b with respect to the planting machine body by adjusting the rotation of the float support shaft 70.
The seedling planting depth of each of the seedling planting mechanisms 11a to 11c is changed by changing the mounting heights of the planting machines 14c to 14c. Then, even if the traveling machine body tilts back and forth due to unevenness of the cultivator, the raising / lowering control mechanism sets the height of the planting machine body with respect to the mud surface within the set range.
0 is automatically moved up and down with respect to the traveling machine, and the seedling planting mechanism 1
The planting depth of 1a to 11c is maintained at or near the planting depth set by adjusting the float mounting height.

As shown in FIG. 6, the connecting frame 7 is constructed so as to rotate around the axis Z in the longitudinal direction of the traveling machine body with respect to the support member 5a of the link mechanism 5, and the seedling planting device 10 is provided. Is rolled around the axis Z with respect to the traveling body. The tilt sensor 59 attached to the seedling support column 22 is configured to detect the tilt direction and tilt angle of the seedling planting device 10 in the lateral direction of the machine body. The tilt sensor 59 is linked to the tilt sensor 59 and electrically driven. A rolling control mechanism 50 having a motor M is attached to the support member 5a. Rolling control mechanism 5
In the case of 0, the rolling motor M is driven based on the information from the tilt sensor 59 to rotate the lateral feed screw shaft 51, so that the rolling manipulator 52 screwed to the lateral feed screw shaft 51 is mounted on the machine body. The rolling operation tool 52 is moved laterally to pull the left side body part through the connecting rod 53 and the coil spring 54, which connects the rolling operation tool 52 to the seedling support column 22 of the left side body part, or the rolling operation tool. The seedling planting apparatus 10 is rolled by pulling the right side body part through the connecting rod 53 and the coil spring 54 connecting 52 to the seedling support column 22 of the right side body part. Then, the rolling operation is performed so that the detection result of the tilt sensor 59 becomes a horizontal or substantially horizontal detection result. That is,
Even if the traveling body tilts to the left or right due to the unevenness of the tiller,
The rolling control mechanism 50 automatically performs a rolling operation so that the seedling planting device 10 is horizontal or nearly horizontal with respect to the mud surface when viewed from the front and rear direction of the machine body, and the planting depths on the left and right sides of the seedling planting device 10 are almost equalized. Keep the same depth. The coil spring 55 shown in FIG. 6 is attached across a spring support tool 56 included in the seedling placing table 12 and a spring support tool 58 included in a support column 57 standing on the supporting member 5a, so that the seedling placing table 12 can be moved laterally. Seedling planting device 1 because of its weight sent
It prevents the left and right weight balance of the entire body from being lost.

As shown in FIGS. 2 and 3, the seedling placing table 1
2 and the seedling placing table guide rail 13 are configured to be divided into two divided seedling placing table portions 12a and 12b and divided seedling placing table guide rail portions 13a and 13b at the dividing line Y, and the first connecting link 15a and the first connecting link 15a The 2 connecting link 15b is rotated with respect to the connecting frame 7 about the axial center X1 of the connecting shaft connecting the connecting links 15a and 15b and the connecting frame 7 in the vertical direction of the machine body.
Also, the connecting links 15a and 15b and the bracket portion 16a
Is configured to rotate relatively to the main frame 16 around the axis X2 of the connecting shaft connecting the and
The seedling planting device 10 is divided into two divided seedling planting device parts 10a, 1
It can be divided into 0b. That is, the left-side machine body portion, one divided seedling placing table portion 12a, one divided seedling placing table guide rail portion 13a, the seedling planting mechanism 11a to.
Of the three 11c, the first of the three supported by the left body part
Seedling planting mechanism 11a and one third seedling planting mechanism 11c, first
The 1st division seedling planting device part 10a provided with each of the side grounding floats 14a, the said right side body part, the other division seedling mounting base part 12b, the other division seedling mounting base guide rail part 13a, seedling planting mechanism 11a-. A first split seedling provided with each of three second seedling planting mechanisms 11b and one third seedling planting mechanism 11c, a second side leveling float 14a, and a center leveling float 14c supported by the right-side body part of 11c. It is configured so that it can be divided into the planting device portion 10a. Then, both split seedling planting device portions 10a, 1
0b by changing the connecting attitude of the connecting links 15a, 15b with respect to the connecting frame 7 and the connecting attitude of the main frame 16 with respect to the connecting links 15a, 15b, the seedling planting device 10 is divided into two split seedling planting device parts 10a, 1
0b is connected to the traveling body as shown in FIGS. 2 and 4, and both split seedling planting device parts 10a and 10b are shown in FIG.
Also, as shown in FIG. 5, it can be switched to a folded storage state in which it is connected to the traveling machine body.

That is, as shown in FIG. 2, the first connecting link 15a and the second connecting link 15b are set in a connecting posture in which the connecting frame 7 extends laterally of the traveling machine body, and the main parts of both split seedling planting device parts 10a, 10b are arranged. The frame 16 is connected to the rear side of the connecting links 15a, 15b by the connecting links 15a, 1
The connecting posture is parallel to 5b. Then, the divided seedling planting device portions 10a and 10b are the seedling planting mechanisms 11a and 1a.
1b, 11c in parallel direction, divided seedling platform portion 12a,
The lateral direction of 12b is along the lateral direction of the traveling machine body, and the front and rear directions of the ground leveling floats 14a to 14c are in a lateral posture in which the front and rear directions are along the longitudinal direction of the traveling machine body. Connected to the seedling planting device 10
Is in working condition. At this time, both split seedling planting device parts 1
The rear end sides of the planting drive cases 18 of 0a and 10b are connected to each other by a connecting rod 26, and both split seedling planting device parts 10
The a and 10b are fixed in the connected posture in the working state. In addition, the output shaft 8a of one of the pair of left and right output shafts 8a, 8a of the transmission case 8 configured to input the rotational force of the rotary shaft 6 and attached to the lower side of the connecting member 7 A transmission shaft 27 for transmitting power to the input case 17 of the split seedling planting device portion 10a is connected, and a transmission shaft 27 for transmitting power to the input case 17 of the second split seedling planting device portion 10b is connected to the other output shaft 8a. Connect and divide both seedling planting device parts 10a, 10b
The lateral feeding drive of the seedling planting mechanisms 11a to 11c and the first divided seedling placement base portion 12a of the first divided seedling planting device portion 10a is enabled. Furthermore, both split seedling planting device portions 10a, 1
0b of the divided seedling placing base portions 12a and 12b are brought close to each other and connected by a connecting means (not shown) so that the second divided seedling placing base portion 12b can be laterally driven together with the first divided seedling placing base portion 12a. To do. Then, the seedling planting device 10
The first side ground leveling float 14a is attached to one side of the work area by the first side ground leveling float 14a, and the other side of the work side is connected to the first side ground leveling float 14b as the aircraft travels.
The second and third side leveling floats 14b are respectively leveled by a center leveling float 14c, and the third innermost one of the four seedling planting mechanisms 11a and 11c of the first divided seedling planting device portion 10a is located inside the body. The three first seedling planting mechanisms 11a other than the seedling planting mechanism 11c perform seedling planting on the ground leveling site by the first side ground leveling float 14a, and the second
Four seedling planting mechanisms 11b of the divided seedling planting device portion 10b,
Three second seedling planting mechanisms 11b other than the third seedling planting mechanism 11c, which is located on the innermost side of the airframe among the 11c, plant seedlings on the ground leveling site by the second side ground leveling float 14b, and the first split seedlings are planted. Third seedling planting mechanism 1 of planting mechanism 10a
1c and the third seedling planting mechanism 1 of the second split seedling planting mechanism 10b
Two third seedling planting mechanisms 11c including 1c plant seedlings on the ground leveling site by the center ground leveling float 14c.

Then, as shown in FIG. 3, the transmission shafts 27 of the split seedling planting device portions 10a, 10b are separated from the output shaft 8a of the transmission case 8, and the connecting rod 26 is removed to separate the split seedlings. The posture of the planting device parts 10a and 10b can be changed. And the 1st connection link 15a and the 2nd connection link 15b are made into the connection attitude | position which extends to the back of a traveling machine body from the connection member 7, and the main frame 16 of both split seedling planting apparatus parts 10a, 10b is connected link 1.
The connecting posture is set so as to be parallel to the connecting links 15a and 15b on the lateral outside of 5a and 15b. Then, the divided seedling planting device portions 10a, 10b are connected to the seedling planting mechanisms 11a, 11b, 1 respectively.
The parallel direction of 1c and the lateral direction of the divided seedling platform parts 12a and 12b are along the front-back direction of the traveling body, and the ground float 1
4a to 14c are in a front-back orientation in which the front-rear direction is along the lateral direction of the traveling machine body, and both split seedling planting device portions 10
a, 10b side leveling floats 14a, 14b front end sides face each other and center leveling float 14
The c is connected to the traveling machine body while being folded so as to be aligned in the lateral direction of the traveling machine body in a posture in which c is located on the rear side of the traveling machine body with respect to the second side leveling float 14b, and the seedling planting device 10 is in the retracted state. At this time, the float support shaft 70 is joined by a joint 71 to a first float support shaft portion 70a that supports the first side ground leveling float 14a and a second float shaft shaft that supports the second side ground leveling float 14b and the center leveling float 14c. And a portion 70b.

As shown in FIGS. 4 and 7, a pair of planting drive cases 18, 1 of the first divided seedling planting device portion 10a.
The first pump mounting base 3 which is supported by 8 via the leg portions 36a
6, two fertilizer pumps P1 and P3 attached to 6, and a pair of planting drive cases 18 of the second divided seedling planting device portion 10b,
Two fertilizer pumps P2 and P3 attached to the second pump mount 39 which 18 supports via the leg portions 39a, and the first split seedling planting device portion of these four fertilizer pumps P1, P2 and P3 First fertilizing pump P1 and third provided in 10a
Fertilizer application hoses 31a and 33 are provided at the fertilizer delivery part of the fertilizer application pump P3.
The first fertilizer application nozzle 31 and the third fertilizer application nozzle 33, which are separately connected via a, and the four fertilizer application pumps P1, P2.
The second fertilization nozzle 32 that is separately connected to the fertilizer delivery parts of the second fertilization pump P2 and the third fertilization pump P3 of the second split seedling planting device portion 10b of P3 via fertilization hoses 32a and 33a. And the third fertilizer nozzle 33 constitute a deep fertilizer applicator, and three fourth fertilizer pumps P4 and the second fertilizer pump P4 mounted on the first pump mount 36 are provided.
Five fifth fertilizing pumps P5 attached to the pump mount 39, and the first of these eight fertilizing pumps P4, P5
The fourth fertilizer nozzle 34, which is separately connected to the fertilizer delivery portions of the three fourth fertilizer application pumps P4 provided in the divided seedling planting device portion 10a via the fertilizer hoses 34a, and the eight fertilizer pumps P4 and P5. The side strip fertilizer application is performed by each of the fifth fertilizer application nozzles 35 that are separately connected to the fertilizer delivery parts of the five fifth fertilizer application pumps P5 included in the second divided seedling planting device portion 10b of the fifth fertilizer application nozzles 35. The side-row fertilizer applicator and the deep-layer fertilizer applicator constitute the fertilizer applicator 30.

The first fertilizer application nozzle 31 of the deep fertilizer applicator
Is deeper than the fertilization nozzles 34, 35 of the lateral row fertilizer application in the field mud between the seedling planting points by the two first seedling planting mechanisms 11a located on the lateral outer side of the first divided seedling planting device part 10a. The paste fertilizer is arranged so as to be buried and attached to the first side leveling float 14a.
Is deeper than the fertilizer nozzles 34, 35 of the lateral row fertilizer applicator in the field mud between the seedling planting points by the two second seedling planting mechanisms 11a located laterally outside the second divided seedling planting device portion 10b. The third fertilizer nozzle 33, which is arranged so as to bury the paste fertilizer, is attached to the second side leveling float 14a, and is located in the first divided seedling planting device portion 10a of the pair of third fertilizer nozzles 33, 33. Is a fertilizer applied by the side-row fertilizer application to the field mud between the third seedling planting mechanism 11c located in the first divided seedling planting device portion 10a and the first seedling planting mechanism 11a adjacent thereto. The third fertilizing nozzle 33, which is arranged so as to be buried deeper than the nozzles 34 and 35 and attached to the left side body part and is located in the second split seedling planting device portion 10a, is the second split seedling plant. Located on device part 10b In order to bury the paste fertilizer deeper in the field mud between the third seedling planting mechanism 11c and the second seedling planting mechanism 11b adjacent thereto, in the field mud, than the fertilizer nozzles 34, 35 of the lateral row fertilizer applicator. It is arranged and attached to the right side body part.

Three fourth fertilizer nozzles 34 of the side strip fertilizer applicator
Are located one by one near the lateral sides of the three first seedling planting mechanisms 11a located in the first divided seedling planting device portion 10a.
Arranged to embed the paste fertilizer in the field mud near the side of the seedling planting mechanism 11a and attached to the first side leveling float 14a, and the five fifth fertilizer application nozzles 35 are the first split seedlings. Next to the third seedling planting mechanism 11c located in the planting device portion 10a, one third seedling planting mechanism 11c located in the second divided seedling planting device portion 10b, and three second seedling planting mechanisms 11b. The second side leveling float 14b and the center leveling float 14c are arranged so that the paste fertilizer is buried in the field mud near the lateral side of the seedling planting location by each seedling planting mechanism 11b, 11c, one by one near the side. It is distributed and attached to.

The fertilizer receiving portions of the first fertilizing pump P1 and the third fertilizing pump P3 located in the first divided seedling planting device portion 10a are communicated with each other, and the fertilizer feeding pipe is fed from the fertilizer receiving portion of the first fertilizer pump P1. A flexible hose 46a, which extends 45a downward in the machine body, passes the fertilizer feed pipe 45a in the front-rear direction below the machine body portion of the first divided seedling planting device portion 10a, and the flexible hose 46a. Is connected to the second fertilizer tank T2 by a flexible hose 46b connecting to the fertilizer delivery part of the second fertilizer tank T2 of the three fertilizer tanks T1 and T2, and the second split seedling planting device portion 1
Second fertilizer pump P2 and third fertilizer pump P located at 0b
3 communicate with the fertilizer receiving part and the fertilizer feeding pipe 45b extends downward from the fertilizer receiving portion of the third fertilizer pump P3, and the fertilizer feeding pipe 45b is connected to the second split seedling planting device portion. The four fertilizer pumps P1, P2, P3 of the deep fertilizer applicator are connected to the second fertilizer tank by connecting to the flexible hose 46b through a flexible hose 46c that passes under the body of 10b in the front-back direction. It is connected to T2. The fertilizer receiving portions of the three fourth fertilizing pumps P4 located in the first divided seedling planting device portion 10a are communicated with each other, and the fertilizer receiving portion of one fourth fertilizing pump P4 located at the end of this pump group is connected to the fertilizer receiving portion. The fertilizer feed pipe 42a is extended downward in the machine body, and the fertilizer feed pipe 42a
A flexible hose 43a that passes below the body of the first split seedling planting device portion 10a in the front-rear direction, and this hose 43a
The first of the two of the three fertilizer tanks T1, T2
Two flexible hoses 43b and 43b, which are separately connected to the fertilizer delivery section of the fertilizer tank T1, are connected to the two first fertilizer tanks T1 and T1, and the second split seedling planting device portion 10b.
The five fertilizer receiving parts of the fifth fertilizing pump P5 located in the are communicated with each other, and the fertilizer feeding pipe 42b is directed downward from the fertilizer receiving part of the fifth fertilizing pump P5 located at the end of the pump group. While extending, the fertilizer feeding pipe 42b is connected to the two flexible hoses 43b, 43b by a flexible hose 43c that passes in the front-rear direction below the body portion of the second divided seedling planting device portion 10b. By doing so, the eight fertilizer pumps P4, P5 of the side-row fertilizer applicator are connected to the two first fertilizer tanks T1, T1.

The input shafts of the first transmission device M1 and the fourth transmission device M4 supported by the first pump mount 36 are connected to the power take-out portion 19a of the transmission case 19 of the first split seedling planting device portion 10a. The output end of the transmission shaft 28 extending below the first pump mount 36 is linked by a transmission chain, and the output shaft of the first transmission M1 is connected to the first fertilization pump P.
The input shaft of the first fertilizer pump P1 and the input shaft of the third fertilizer pump P3
The transmission chain is wound around the input shaft of the fourth transmission device M4, and the output shaft of the fourth transmission M4 is linked to the input shaft of one of the four fourth fertilization pumps P4 by the transmission chain. By winding a transmission chain around the input shafts of two adjacent pumps P4 and P4 of the four fourth fertilization pumps P4 and interlocking the three fourth fertilization pumps P4, The turning force is transferred to the first fertilizer pump P via the first transmission M1.
1 to the third fertilizer pump P3, and the fourth transmission M4
The third fertilization pumps P1, P2, P4 located in the first divided seedling planting device portion 10a can be driven. Second transmission M2 supported by the second pump mount 39
And an input shaft of the fifth transmission M5 extending from the power take-out portion 19a of the transmission case 19 of the second split seedling planting device portion 10b to a position below the second pump mount 39.
8 is extended by a transmission chain, the output shaft of the second transmission M2 is linked to the input shaft of the third fertilization pump P3 by a transmission chain, and the output shaft of the third fertilization pump P3 and the second fertilization pump are connected. A transmission chain is wound around the input shaft of the pump P2, and the output shaft of the fifth transmission M5 is one of the five fifth fertilization pumps P5.
In addition to interlocking with the input shaft of the
From the transmission case 19 by winding the transmission chain around the input shafts of the two adjacent pumps P5 and P5 of the five fifth fertilization pumps P5 and interlocking the five fifth fertilization pumps P5. Rotation power of the second fertilizer pump P2 and the third fertilizer pump P3 via the second transmission M2.
And to the five fifth fertilizer application pumps P5 via the fifth transmission M5, and each fertilizer application pump P2, P3, P located in the second split seedling planting device portion 10b.
5 can be driven.

As a result, the deep fertilizer application of the fertilizer applicator 10 uses the first fertilizer pump P1 to apply the paste fertilizer stored in the second fertilizer tank T1 to the first fertilizer nozzle 3
1, the second fertilizer pump 32 is used to feed the second fertilizer nozzle 32.
To the third fertilizing nozzle 33 by the third fertilizing pump P3. Then, by the first fertilizer nozzle 31, by the second fertilizer nozzle 32, in the field on the side of the seedling planting location by the two outer first nursery planting mechanisms 11a of the three first nursery planting mechanisms 11a. In the field on the side of the seedling planting place by the two outer second seedling planting mechanisms 11b of the three second seedling planting mechanisms 11b, the first seedling planting mechanism is provided by the third fertilizing nozzle 33 on one side. 11a and 3rd seedling planting mechanism 1
In the field on the side of the seedling planting point by 1b, the other third
By the fertilizer application nozzle 33, the paste fertilizer is buried deeper than the side-row fertilizer application in the fields on the sides of the seedling planting locations by the second seedling planting mechanism 11a and the third seedling planting mechanism 11b. The lateral strip fertilizer application of the fertilizer applicator 10 uses the paste fertilizer stored in the two first fertilizer tanks T1 as the fourth fertilizer.
The fertilizer pump P4 supplies the fourth fertilizer nozzle 34 and the fifth fertilizer pump P5 supplies the fifth fertilizer nozzle 35. Then, by the fourth fertilizer nozzle 34, in the field near the side of the seedling planting location by the first seedling planting mechanism 11a,
The fifth fertilizer nozzle 35 is used to bury the paste fertilizers in the fields near the lateral sides of the seedling planting locations by the second seedling planting mechanism 11b and the third seedling planting mechanism 11c, respectively.

That is, when carrying out the planting work, the traveling machine body is run with the seedling planting device 10 in the connected posture in the working state. Then, each leveling float 14a, 14b, 14
The planned seedling planting site is rectified by c, and the three first seedling planting mechanisms 11a of the first divided seedling planting device portion 10a carry out seedling planting at the landslide site by the first side landscaping float 14a. Three second seedling planting mechanisms 11b of the second divided seedling planting device portion 10b carry out three-row seedling planting on the ground terrain by the two-side soil culturing float 14b.
The third seedling planting mechanism 11c of the first split seedling planting device portion 10a and the second seedling planting device portion 10a
The third seedling planting mechanism 11c of the divided seedling planting device portion 10b carries out seedling planting, so that eight-row seedling planting can be carried out.
Then, even if the traveling machine body tilts back and forth, the raising / lowering control mechanism controls the raising / lowering of the seedling planting device 10, so that the planting depth by each of the seedling planting mechanisms 11a to 11c is kept substantially constant, and the vehicle travels. Even if the body tilts to the left and right, the rolling control mechanism 50 controls the rolling of the seedling planting device 10 so that the left and right planting depths can be kept substantially the same. Furthermore, by the action of the fertilizer application device 10, paste fertilizer is applied to both a relatively shallow portion near the lateral side of each of the eight-row planted seedlings and a portion relatively deeper and further away from the planted seedlings than this location. Fertilization work to be buried can be performed at the same time. When carrying out traveling or carrying, the lateral width of the seedling planting device 10 can be made narrower than that during work by putting the seedling planting device 10 in the folded and stored state.

The first fertilizer application nozzle 31 and the second fertilizer application nozzle 32 of the deep-layer fertilizer application are attached to the side leveling floats 14a and 14b by the attachment structure shown in FIG. That is, the nozzle insertion hole 60 is provided on the front end side of the floats 14a and 14b, and the nozzle mounting bracket 61 is fixed, and the fertilizer application nozzles 31 and 32 are located on the float upper surface side of the insertion hole 60 of the base end side. At the same time, the end of the fertilizer application hoses 31a and 32a connected to the bracket 61 is fixed to a nozzle support 62 which is rotatably supported by the bracket 61 around a float lateral axis 61a. Then, the nozzle support 62 is attached to the bracket 61.
By manipulating the fertilizer, the fertilizer application nozzles 31, 3
The tip end side where the two fertilizer discharge ports 31b and 32b are located can be swingably adjusted so as to move up and down around the shaft core 61a with respect to the floats 14a and 14b, and is supported by the nozzle support tool 62 so that it can move back and forth. By engaging the position fixing projection 63, which is urged toward the bracket 61 by a lock spring (not shown), into one positioning hole 64 selected from a plurality of positioning holes 64 provided in the bracket 61, The fertilizer application nozzles 31 and 32 are configured so that they can be fixed at adjustment positions, and the nozzle support tool 62 is attached to the bracket 6.
By swinging with respect to 1, the fertilizer application nozzle 31,
The fertilization depth by 32 can be adjusted between the deepest position D and the shallowest position U.

The pair of third fertilizing nozzles 33, 33 of the deep-layer fertilizing apparatus are attached by the attaching structure shown in FIGS. 9 and 11. That is, the nozzle support arm 72 is integrally rotatably extended from the first float support shaft portion 70a, and the first end of the nozzle support arm 72 is located at the first split seedling planting device portion 10a. When the end of the fertilizing nozzle 33 on the proximal end side to which the fertilizing hose 33a is connected is fixed and the float support arm 29a is swingably adjusted, the first float support shaft portion 7 is accompanied by this.
0a is rotated to swing the nozzle support arm 72, and the tip side of the third fertilizer application nozzle 33 having the fertilizer discharge port 33a is moved up and down in the same direction as the first side leveling float 14a with respect to the planting machine. There is.

The nozzle support arm 73 is integrally rotatably extended from the second float support shaft portion 70b, and is located at the second split seedling planting device portion 10b on the extended end side of the nozzle support arm 73. When the end of the third fertilizing nozzle 33 on the proximal side to which the fertilizing hose 33a is connected is fixed and the float support arm 29b is swingably adjusted, the second float supporting shaft portion 70b is accordingly moved. The nozzle support arm 73 swings by pivoting, and the tip end side of the third fertilizer application nozzle 33 having the fertilizer discharge port 33a is second with respect to the planting machine body.
Side leveling float 14b and center leveling float 1
It is configured to move up and down in the same direction as 4c.

That is, at the time of work, the first float support shaft portion 70a and the second float support shaft portion 70b are integrally rotated by the joint 71 in order to switch the seedling planting apparatus 10 from the folded storage state to the working state. One float support shaft 70 is connected to form one float support shaft 70, and the float support shaft 70 is pivotally adjusted by a planting depth adjusting lever to swing each float support arm 29a, 29b up and down with respect to the planting machine. Dynamically adjust the seedling depth.
When the float support arms 29a, 29b are adjusted to swing vertically with respect to the planting machine, the float support arms 29a, 29b
The ground level floats 14a, 14 with the base end side of 29b being the front end side
The axis L1 which is a connection point with b and 14c is moved up and down with respect to the field together with the planting machine with the axis L1 being the swing center. At this time, the proximal end side of each third fertilizer application nozzle 33 moves up and down with respect to the field together with the planting machine, but the float support shaft 70 rotates with respect to the planting machine body and each third fertilizer application nozzle 33 causes the float support shaft 70 to move.
By rotating together, the fertilizer discharge port side of each third fertilizer application nozzle 33 moves up and down to the side opposite to the base end side with respect to the planting machine body. As a result, even if the planting depth is changed, each third
The depth at which the fertilizer outlet side of the fertilizer application nozzle 33 is located in the field does not change, or even if it changes, it changes only slightly compared to the seedling planting depth. Fertilization work can be performed while making the planting depth the same as or close to the one before the change.

As shown in FIG. 10, in the state where the fertilization depth by the first fertilization nozzle 31 and the second fertilization nozzle 32 is adjusted to be the same as the fertilization depth by the third fertilization nozzle 33, before the first fertilization nozzle 31. The fertilization nozzles 31 to 33 are formed so that the rising inclination angle K1 and the front rising inclination angle K2 of the second fertilization nozzle 32 are larger than the front rising inclination angle K3 of the third fertilization nozzle 33. That is,
The first and second fertilizer application nozzles 31, 32 are in a state in which contaminants such as straw debris easily flow around the side leveling floats 14a, 14b, bypassing the fertilizer application nozzles 31, 32, and the third fertilizer application nozzles. 33 is a side leveling float 1
It is located between the 4a and 14b and the center ground leveling float 14c, and is in a state where foreign matter is easily hit. That is, the first
Although a shorter nozzle than the third fertilization nozzle 33 is adopted as the second fertilization nozzles 31 and 32, while making the fertilization locations for the planted seedlings by the respective fertilization nozzles 31 to 33 the same in the machine front-back direction, The first and second fertilizer application nozzles 31, 32 are provided with side leveling floats 14a, 1
Due to the guarding action of 4b, the third fertilizer application nozzle 33 can be operated while the foreign matter is less likely to be caught on the third fertilizer application nozzle 33 due to its small forward rising inclination angle.

As shown in FIGS. 12 and 13, a bracket 82 for supporting a vertically extending end portion of the traveling body of the tank support rod 80 extending from the first fertilizer tank T1 by a body portion 81 of the traveling body. By rotatably supporting the first fertilizer tank T1 around the shaft core 82b located at one end of the first fertilizer tank T1 by supporting the boss portion 82a of the shaft rotatably around the shaft core 82b in the vertical direction of the machine body, as shown in FIG. The working posture shown by the solid line and the fertilizer feeding posture shown by the two-dot chain line in FIG. 12 can be switched. That is, FIG.
As shown in (a), the fertilizer tank T1 is rotated to rotate the positioning plate 88 attached to the tank support rod 80, and the support plate portion 82c of the bracket 82 is connected to the lower surface side of the connecting pin. The locking roller 86 attached to the free end side of the positioning body 85 that is rotatably supported via 84 is urged by the positioning spring 87 that urges the positioning body 85 to rotate. When the first fertilizer tank T1 is engaged with the first cutout portion 88a of the 88, the first fertilizer tank T1 is in the working posture. That is, the longitudinal direction of the fertilizer tank T1 is along the longitudinal direction of the traveling machine body, and the free end side is located on the side of the engine bonnet in a state of being located on the rear side of the machine body rather than the rotation fulcrum side. At this time, the fertilizer tank T1 has a positioning body 85 and a positioning board 88 that are determined by the biasing force of the positioning spring 87.
The work posture is maintained by the engaging force with. Further, as shown in FIG. 14B, when the fertilizer tank T1 is rotated to rotate the positioning board 88 and the locking roller 86 is engaged with the second cutout portion 88b of the positioning board 88, The 1 fertilizer tank T1 is in a posture for supplying fertilizer. That is, the longitudinal direction of the fertilizer tank T1 is along the lateral direction of the traveling machine body, the free end side is located on the front side of the machine body with respect to the rotation fulcrum side, and the fertilizer tank T1 projects forward from the traveling machine body so that fertilizer can be charged from above the ridge. Located on the side of the engine hood. At this time,
The first fertilizer tank T1 is held in the fertilizer supply posture by the engaging force between the positioning body 85 and the positioning board 88, which is determined by the biasing force of the positioning spring 87.

When the first fertilizer tank T1 is set in the working posture, the positioning pin 88 and the lock plate portion 82d of the bracket 82 are attached with detachable lock pins 89 to lock the working posture. I can do it. That is, when there is a possibility that the first fertilizer tank T1 will rotate due to the positioning body 85 being disengaged only by holding the posture by the positioning body 85, such as when traveling vibration is severe, the lock pin 89 reliably holds the working posture. it can.

[Another Embodiment] FIG. 16 shows a seedling planting device 10 having another embodiment structure. That is, it is equipped with five leveling floats 90 ... And ten seedling planting mechanisms 11.
Further, it is provided with a deep-layer fertilizer application device having six fertilizer application nozzles 91. Then, the first divided seedling planting device portion 10 including the two leveled floats 90, the four seedling planting mechanisms 11, the first divided seedling platform portions 12a, the two fertilizer application nozzles 91, and the like.
a, three leveled floats 90, six seedling planting mechanism 1
1, 2nd division seedling placing part 12b, 4 fertilizer application nozzles 9
1 and the like into a second split seedling planting device portion 10b, and as shown in FIG. 17, both split seedling planting device portions 10a, 1
0b can be switched between a working state in which 0b is connected to the traveling machine body in a lateral posture, and a folded storage state in which 0b is connected to the traveling machine body in a posture that extends in the longitudinal direction of the traveling machine body as shown in FIG. There is.

When the seedling planting device 10 is put into a working state, two seedling planting mechanisms 1 are provided at the ground leveling points by the respective ground leveling floats 90.
1 performs seedling planting, and these two seedling planting mechanisms 1
The fertilizer application nozzle 91 embeds the paste fertilizer between the planted seedlings according to 1.

As shown in FIG. 15, each fertilizer application nozzle 91
Is a nozzle that integrally rotatably extends from a float support shaft 93 that is laterally mounted on the machine body and is attached to the lower surface side of the machine body 92 of the seedling planting device 10 so as to be rotationally adjustable by a planting depth adjusting lever (not shown). It is supported by the extended end of the support arm 94. Then, the float support shaft 93 is rotationally adjusted, and the float support arm 95 extends from the float support shaft 93 and rotatably supports the rear end side of the leveling float 90.
Rocking up and down relative to the body 92 to adjust the leveling float 9
When changing the seedling planting depth by changing the mounting height for the 0 planting machine, the tip side of the fertilizer application nozzle 91 having the fertilizer discharge port 91a moves up and down in the same direction as the leveling float 90 with respect to the machine 92. Configured.

In each of the above embodiments, the fertilizer application nozzle 3
3 and 91 are mounted on the float support shafts 70 and 93 that rotate together with the float support arms 29a, 29b, and 95 with respect to the body of the seedling planting device 10, but the float support arm 29a is attached to the body. , 29b, 95 to rotate integrally with the float support arms 29a, 29
It may be implemented by adopting a configuration of attaching to b and 95.
Also in this case, the fertilizer discharge ports of the fertilizer application nozzles 33 and 91 are moved up and down in the same direction as the leveling floats 14a to 14c and 90 with respect to the machine body in accordance with the change of the seedling planting depth. Without changing the fertilization depth, even if the fertilization depth changes, it can be changed only slightly compared to the amount of change in the seedling planting depth.

The present invention can also be applied to a fertilizer application apparatus which uses a fertilizer in which granular fertilizer is mixed with a fluid gel made of a superabsorbent polymer which has absorbed water, instead of the paste fertilizer.

[Brief description of drawings]

[Figure 1] Side view of the entire riding rice transplanter with fertilizer application

FIG. 2 is a plan view of the seedling planting device in a working state.

FIG. 3 is a plan view of the seedling planting device in a folded and stored state.

FIG. 4 is a plan view of the fertilizer application device when the seedling planting device is in a working state.

FIG. 5 is a plan view of the fertilizer application device when the seedling planting device is in the folded and stored state.

FIG. 6 is a front view of a rolling control structure.

[Figure 7] Rear view of the fertilizer applicator

FIG. 8 is a side view of a side fertilizing nozzle arrangement portion.

FIG. 9 is a side view of a center fertilization nozzle arrangement portion.

FIG. 10 is a side view of a center fertilizing nozzle arrangement portion.

FIG. 11 is an explanatory diagram of arrangement of a float support arm.

FIG. 12 is an explanatory view of a first fertilizer tank mounting structure.

FIG. 13 is a sectional view of the first fertilizer tank support portion.

FIG. 14 is a plan view of the fertilizer tank positioning structure.

FIG. 15 is a side view of a fertilizer application nozzle mounting structure according to another embodiment.

FIG. 16 is an explanatory view of the arrangement of the leveling float and the fertilizer application nozzle in the seedling planting device of another embodiment.

FIG. 17 is a plan view of the seedling planting device of another embodiment in a working state.

FIG. 18 is a plan view of the seedling planting apparatus according to another embodiment in a folded and stored state.

[Explanation of symbols]

10 Seedling planting equipment 14a, 14b Side leveling float 14c Center leveling float 31, 32 Side fertilizer nozzle 33 Center fertilizer nozzle 70, 93 members 29a, 29b, 95 Float support arm 90 Leveling float 91 Fertilizer nozzle K1, K2, K3 Forward tilt angle

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01C 11/00 302 A01C 23/02

Claims (3)

(57) [Claims] 1. A leveling float that acts on a seedling planting area is supported by a float support arm extending from the machine body.
This float support arm is vertically adjusted with respect to the machine body to change the mounting height of the ground leveling float with respect to the machine body to connect the seedling planting device configured to change the seedling planting depth to the traveling machine body. A fertilizer application structure of a rice transplanter, wherein the fertilizer nozzle for burying fertilizer in a field on the side of a planting seedling to a ground leveling site by the leveling float is the float support arm, or the float support arm with respect to a machine body. In addition to being supported integrally with a member that rotates together,
A fertilizer application structure for a rice transplanter, wherein the fertilizer discharge port side of the fertilizer application nozzle is configured to move up and down in the same direction as the ground level float with respect to the machine body as the float support arm is adjusted to swing. 2. A center leveling float in which the leveling float is located at the center of the seedling planting device in the lateral direction of the machine body and acts as a leveling ground, wherein the fertilizer nozzle is a lateral side of the seedlings to be grounded by the center leveling float. It is a center fertilizer nozzle for burying fertilizer in the field with a side landscaping float that works on the side of the machine than the center landscaping float. The fertilizer application structure for a rice transplanter according to claim 1, wherein a side fertilizer nozzle to be buried in a field is attached to the side leveling float. 3. The fertilizer application structure of a rice transplanter according to claim 2, wherein the front rising inclination angle of the side fertilizing nozzle is set to be larger than the front rising inclination angle of the center fertilizing nozzle.