JPH09107751A - Rice transplanter - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To prevent air blowing from the fertilizer drop port (127) of a hose joint (69) and to increase the fertilizer suction force of the fertilizer drop port (127). SOLUTION: An air tank (4
2), a fertilizer feeding case (38) for feeding fertilizer, and a transfer hose (40) for feeding fertilizer to the planting section (15),
The rice transplanter connected by the hose joint (69) is characterized in that the fertilizer drop port (127) is formed in the direction opposite to the air ejection direction of the hose joint (69).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice transplanter having, for example, a seedling mounting table and planting claws for continuously performing a seedling planting operation and a side-row fertilizing operation.

[0002]

Conventionally, an air tank for supplying fertilizer conveying air, a fertilizer feeding case for feeding fertilizer, and a conveying hose for feeding fertilizer to a planting part are connected by a hose joint, and the air tank There is a technology to send the fertilizer from the fertilizer feeding case to the transfer hose by the air. However, there is a problem that the air from the air tank blows out toward the fertilizer feeding case, and it is not possible to easily increase the suction force of the fertilizer dropping port of the hose joint, and the outer circumference of the fertilizer dropping port of the hose joint is cylindrical. When it is formed, there is a problem that the airtightness of the outer peripheral portion of the fertilizer drop opening cannot be easily improved.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, an air tank for supplying fertilizer conveying air, a fertilizer feeding case for feeding fertilizer, and a conveying hose for feeding fertilizer to a planting portion are connected by a hose joint. In the rice transplanter to be made, by forming the fertilizer drop port in the direction opposite to the air ejection direction of the hose joint, it is possible to prevent air from blowing out from the fertilizer drop port of the hose joint, and to increase the fertilizer suction force of the fertilizer drop port. It can be easily increased.

In addition, the air outlet of the hose joint is opened approximately at the center of the fertilizer drop port, and the jet of air from the air jet port sucks the air on the fertilizer drop port side.
The fertilizer feeding case side can be maintained at a positive pressure, and the dust and the like of the fertilizer, which tends to remain, can be easily delivered.

Further, since the downstream side of the air ejection port of the hose joint is formed in a divergent shape, the fertilizer dropped from the fertilizer drop port can be easily moved to the downstream side of the air ejection port, and at the downstream portion of the air ejection port. The fertilizer accumulation of can be easily prevented.

Further, a hook-shaped projection is provided on the outer periphery of the fertilizer drop opening of the hose joint to be connected to the fertilizer feed case to improve the connection confidentiality between the fertilizer feed case and the fertilizer drop opening and to simplify the connection structure. Etc. can be easily performed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cross-sectional explanatory view of a hose joint portion, FIG. 2 is a side view of a rice transplanter for riding, and FIG. 3 is a plan view of the same, in which (1) is a traveling vehicle on which an operator rides, and an engine (2). Mounted above the front of the body frame (3),
The front wheel (6) for traveling paddy fields is supported in front of the mission case (4) through the front axle case (5), and the rear axle case (7) is connected to the rear portion of the gear shift case (4) to connect the rear axle case. The case (7) supports the rear wheel (8) for traveling in the paddy field. The spare seedling mounts (10) are attached to both sides of the hood (9) that covers the engine (2) and the like, and the mission case (4) is provided by the vehicle body cover (12) on which an operator rides through the step (11). The vehicle body cover (12) for covering
A driver's seat (13) is attached to the upper part, and a steering handle (1) is provided in front of the driver's seat (13) at the rear of the hood (9).
4) is provided.

Further, (15) in the figure is a planting section equipped with a seedling table (16) for planting 6 rows, a plurality of planting claws (17), etc. Forward tilting seedling stand (1
6) is supported on the planting case (20) through the lower rail (18) and the guide rail (19) so as to be slidable left and right, and at the same time, the rotary case (21) is rotated at a constant speed in one direction. The pair of claw cases (22) and (22) are supported at the case (20), and a pair of claw cases (22) and (22) are arranged symmetrically around the rotation axis of the case (21).
(22) Attach the planting claws (17) (17) to the tip. A support frame (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and travels via a link mechanism (27) including a top link (25) and a lower link (26). A support frame (24) is connected to the rear side of the vehicle (1), and a lifting cylinder (28) for raising and lowering the planting section (15) is connected to the lower link (26) via the link mechanism (27). Front and rear wheels (6)
(8) is driven to move, and at the same time, the seedlings for one plant are planted from the seedling table (16) that slides back and forth to the left and right.
It is taken out according to 7) and the seedlings are planted continuously.

Further, reference numeral (29) in the drawing denotes a traveling speed change lever,
(30) is a sub gear shift lever for planting up / down and work traveling gear shifting,
(31) is a setting sensitivity adjusting lever, (32) is a main clutch pedal, (33) and (33) are left and right brake pedals,
(34) is a two-floor leveling center float, (35) is a two-floor leveling float, and (36) is a six-floor side fertilizer.

Further, as shown in FIGS. 4 and 5, a fertilizer application hopper (37) which is a fertilizer tank for containing fertilizer, a fertilizer feeding case (38) which supplies a constant amount of fertilizer, and a float (34) which is a fertilizer application portion. A turbo blower type blower (41) for discharging fertilizer to the side-grooving groover (39) of (35) through a flexible type transfer hose (40) and a cylindrical air tank (42) are provided for the fertilizer applicator ( 36), a blower (41) is attached to the right end of the air tank (42), and six sets of six fertilizer feeding cases (38) ... Are arranged above the air tank (42).

Further, as shown in FIGS. 6 to 11, a horizontal frame (44) horizontally extending between upper ends of left and right columns (43) at the rear end of the body frame (3) has left and right base frames (45) (45) on both sides. And the fertilizer applicator (3) through the base frame (45) which is horizontally mounted in the front-rear direction.
6) and the left and right base frames (45) (4)
5) The air tank (42) is bolted and fixed to the body frame (3) via brackets (46) and (46). A side stay (47) is connected between the rear end of the base frame (45) and the vehicle body frame (3). Front and rear elevating rails (48), (49)... Are erected on the front and rear sides of the base frame (45), and one set of front and rear two right and left pairs of four elevating rails (48) (48) are provided.
(49) The fertilizer applicator (36) is attached via the (49) so as to be able to move up and down, and a pair of left and right gas springs (5
0) The fertilizer applicator (36) is mounted to be able to move up and down by (50), and the weight of the fertilizer applicator (36) is supported by the rear axle case (7) arranged at the rear end of the body frame (3). As shown, the front and rear elevating rails (48) (4)
9) is provided with a bearing plate (51) opposed thereto, and bearing rollers (52) which are rotatably fitted to the rails (48) and (49) are rotatably supported by the bearing plate (51). Two sets of two rails (48) and (49) are provided symmetrically, and two upper and lower rollers (52) and (52) are attached to one rail (48) and (49). 51) (51) to four rails (48) (49) and 8
The base frame (45) by the rollers (52) ...
To be able to move up and down freely.

Further, the lower end of the gas spring (50) is connected to the vehicle body frame (3), and the bearing plate (5) is connected.
The upper end of the gas spring (50) is connected to 1), the rails (48) and (49) and the gas spring (50) are erected substantially in parallel, and the gas is positioned at the center of gravity of the fertilizer applicator (36) in the front-rear width direction. The spring (50) is connected so that the gas spring (50) has an extension force substantially equal to or slightly smaller than the weight of the fertilizer applicator (36).

Further, as shown in FIGS. 12 to 15, the left and right bearing plates (51) (51) are integrally fixed by a round pipe-shaped front frame (53), and work is performed when the fertilizer applicator (36) is lifted. A handle (54) grasped by a person is welded and fixed to the front frame (53), and the left and right bearing plates (51) are attached.
The left and right lock levers (56) and (56) are rotatably supported on the (51) via the support shafts (55) and (55), and the left and right lock levers (5) are mounted on the front left and right lifting rails (48) and (48).
6) The left and right bearing plates (51) are locked via the (56) (51), and the left and right lifting rails (49) on the rear side are locked.
Left and right lock pins (57) and (57) are slidably attached to (49), and the engagement holes (5) of the bearing plate (51) shown in FIG.
8), the lock pin (57) is detachably engaged, and the left and right bearing plates (5) are attached to the rear left and right elevating rails (49) (49).
1) (51) The rear portion is locked via left and right lock pins (57) and (57), and the front and rear portions of the bearing plate (51) are locked to the front and rear elevating rails (48) and (49) by the lock lever (56). And the lock pin (57). Further, as shown in FIGS. 15 and 19, vertical engaging holes (58) (59) are formed in the elevating rail (48), and the engaging holes (58) (5) are formed.
9) Engage the lock lever (56) into the fertilizer applicator (3
6) for fixing and supporting 6) in a raised position or a lowered position, and a handle (54) which extends a lock lever (56) to a lower side of the handle (54) so as to project to a driver seat (13) side.
The operator can operate the lock lever (56) by grasping the lock lever (56) to disengage the lock lever (56) from the engagement holes (58) (59).

A case front bracket (60) is fixed to the front frame (53) by welding, and the front side of the feeding case (38) is fixed to the front bracket (60) by bolts. Central 2
The feed-out case (38) (38) is disposed between the left and right lifting rails (48) and (49), and the lifting rail (48)
(49) Outer case for left and right two lines on the outside of the machine (38)
(38) are arranged respectively, and a three-unit feeding case (38)...

Further, as shown in FIGS. 16 to 18, the lower outlet (62) of the hopper (37) is fitted into the inlet (61) on the front side of the upper surface of the feeding case (38), and the feeding case is also provided. (38) Exit (63) on the front lower side
The outlet (63) is closed by a removable cap (64). The cap (64) is removed, the opening (63) is opened, and the fertilizer inside the hopper (37) is caused to flow downward on the front side. At this time, the fertilizer (36) is moved up and down rails (48) (49). At a raised position, the distance between the outlet (63) and the lower air tank (42) is increased, and a container for storing fertilizer is placed in the outlet (6).
3) It is configured so that it can be easily inserted below and the residual fertilizer can be easily taken out.

A bottom lid (66) is detachably fixed to the lower surface of the feeding case (38) through a closing lever (65), and an outlet (67) is formed on the lower surface of the bottom lid (66) made of hard synthetic resin. ) Forming an air tank (42)
A soft synthetic resin joint pipe (6
8), the front end of a hose made of hard synthetic resin (69) is detachably fitted to the rear end of the pipe (68), and the transfer hose (40) is fitted to the rear end of the joint (69). Then, the blower (41) blows air from the air tank (42) to each pipe (68).
0), and the fertilizer which falls from the outlet (67) of the bottom cover (66) to the middle of the joint (69) is transferred to the transfer hose (4).
The joint (69) forming a T-shaped flange has an inlet (70) formed upwardly and open, and a fitting cap (71) is provided at an outlet (67) of the bottom lid (66). The cap (71) is removably fitted to the inlet (70), the outlet (67) is connected to the inlet (70), and the air tank (42) is fixed.
The mounting plate (72) is integrally fixed to the mounting plate (72), and the joint (69) is fixed to the mounting plate (72) by bolting.

Further, the intake port (73) and the outlet port (74)
And an outlet plate (77) having a plurality of substantially square outlets (76) on the same circumference, and an outlet plate (79) having an outlet (78). The plates (75), (77) and (79) made of circular flat plates are arranged in a multi-layer structure between the feeding case (38) and the bottom cover (66), and the feeding shaft (80) is attached to the feeding case (38). Is rotatably supported substantially vertically, the lower end side of the payout shaft (80) is passed through the central portion of each plate (75) (77) (79), and the outlet plate (7
9) A spring (81) is elastically pressed from the lower side to the lower surface, each plate (75) (77) (79) is supported downward by a feeding shaft (80), and each plate is closed by a closing lever (65). (75), (77), (79) are elastically pressed between the feeding case (38) and the bottom lid (66), and the inlet plate (75) and the outlet plate (79) are locked to the feeding case (38). The payout shaft (80) is allowed to freely rotate with respect to each plate (75) (79), and the payout plate (77) is pivotally engaged with the payout shaft (80) so that the payout shaft (80) causes the payout plate (77) to rotate. ) Is forcibly rotated to move fertilizer from the intake port (73) to the discharge port (76) to the discharge port (78) and drop it in the direction of the outlet (67).

A brush (82) for removing excess fertilizer on the upper surface of the delivery port (76) is provided at the end of the intake port (73), and the brush (8) is taken through a height adjusting photographing (83).
2) is attached to the feeding case (38) so as to be adjustable in height, the height of the lower end of the brush (82) with respect to the upper surface of the feeding plate (77) is adjusted from the outside of the feeding case (38), and the feeding outlet (76).
Is configured to regulate the amount of fertilizer delivered.

Further, the air outlet (7) of the inlet plate (75) is
The compressed air intake (84) facing to 4) is extended to the feeding case (3).
8), the hollow portion of the air tank (42) and the compressed air inlet (84) are communicated with each other by a branch pipe (85), and the blower (41) is connected through the pipe (85) and the inlet (84). ) And air from the air tank (42) are supplied to the outlet (74), and are sent from the outlet (74) to the outlet (76) moved to the position of the outlet (78). ) Is forcibly dropped downward to prevent the granular fertilizer or this powder from remaining in the outlet (76).

Further, as shown in FIGS. 7, 10 and 15, a PTO shaft (86) for transmitting the output of the engine (2) to the planting portion (15) is extended rearward from the mission case (4). At the same time, the bearing case (87) is welded and fixed to the left column (43), and the input shaft (88) of the bearing case (87) is placed in the middle of the PTO shaft (86) (8).
The crank plate (91) is detachably fixed to the rear end of the output shaft (90) of the bearing case (87) by a ball lock structure. Further, a square pipe-shaped rear frame (93) for integrally fixing the bearing plate (51) and the case rear bracket (92) is provided, and the rear frame (93) is substantially parallel to the air tank (42) and the front frame (53). Put it on the side, and put the bracket (9
In 2), the rear side of the feeding case (38) is bolted and fixed.

Further, a feeding amount adjusting lever (96) is pivotally supported on the left bearing plate (51) through a bracket (94) and a shaft (95), and a support shaft (51) is supported on the left bearing plate (51). 97), an adjustment link (98) and a fulcrum link (99) are provided, and the screw part (10) of the lever (96) is provided.
0) is connected to the adjustment link (98), and the fulcrum link (9)
9) Attach an adjustment fulcrum (101) to the fulcrum (101).
To support the drive arm (102). By rotating the screw portion (100) by rotating the lever (96) projecting toward the driver's seat (13),
The links (98) and (99) rotate integrally to change the position of the adjustment fulcrum (101), and the operator of the driver's seat (13) can adjust the extension of the lever (102). It is configured as follows.

A feeding drive shaft (104) is rotatably supported by the rear frame (93) through a bearing plate (103), and a swing arm (105) is supported on the drive shaft (104).
And the drive arm (102) is connected to one end of an extendable rod (106) whose length is adjustable, and the swing arm (105) is connected to the other end of the extendable rod (106). The crank plate (91) is connected to the drive arm (102) via an input rod (107), and the PTO shaft (86) for planting drive is connected via the input rod (107) and the drive arm (102). The driving force is transmitted to the feeding drive shaft (104), an operation for simultaneously operating and stopping the planting section (15) and the fertilizer applicator (36) is performed by turning on and off a planting clutch (not shown). ), An operation of removing the crank plate (91), separating the drive unit, and raising the rising portion of the fertilizer applicator (36) is performed. By operating the lever (96), the adjustment fulcrum (1) is operated.
01) is changed, and the reciprocating stroke of the telescopic rod (106) is changed steplessly, so that the fertilizer delivery amount is continuously adjusted.

Further, as shown in FIG. 9, a clutch shaft (109) is rotatably supported on the rear frame (93) through a follow-up prevention one-way clutch (108), and the one-way clutch is supported on the clutch shaft (109). An input link (111) is provided through (110), and the feeding drive shaft (10
4) Fix the swing link (112) to the link (1).
12) is linked to the input link (111) by the link rod (11).
3), the input link (111) is swung to rotate the clutch shaft (109) intermittently in one direction.

In addition, the stud clutch case (114) is fixed to the feeding case (38), and the input shaft (117) is always attached to the upper end side of the feeding shaft (80) via bevel gears (115) (116). A clutch (not shown) for connecting the input shaft (117) to the clutch shaft (109) in a separable manner is internally provided in the clutch case (114).
A clutch lever (118) and a clutch arm (119) for disconnecting and operating the locking clutch of (14) are separately arranged before and after the clutch case (114), and the seedling table (16) of the planting portion (15) is arranged. ) The clutch arm (119) is connected to a planting streak unit clutch lever (120) provided on the upper rear surface via a stap wire (122) that is stretched by an outer receiver (121) of the rear frame (98). Connect. Then, when any of the planting claws (17)... For 6-row planting is stopped by operating the planting streaking unit clutch lever (120),
The case (11) corresponding to the stopped planting claw (17)
The fertilizing operation is stopped by disengaging the line-stopping clutch of 4), and fertilizing is performed only on the line where the seedlings are planted by the planting claws (17).

Further, as shown in FIGS. 12 to 14,
The left and right bearing plates (51) and (51) are welded and fixed to the front frame (53) and the rear frame (93) outside the mounting position of the fertilizer feeding case (38) (38) for the center two rows.
Both ends of the front frame (53) and the rear frame (93) are integrally fixed by left and right side frames (123) (123), and the fertilizer feeding case (38) (3)
8) is attached to the front frame (53) and the rear frame (93) between the bearing plate (51) and the side frame (123), and each of the rectangular frames (53), (93) (1)
23) is divided into three equal parts in the left-right direction by a bearing plate (51), and a fertilizer feeding case (38) for six rows is supported between the front and rear frames (53) (93).

As shown in FIGS. 13, 16 and 18, a bracket (60) provided between the feeding case (38) and the front frame (53) has a viewing hole (124) having a long diameter in the lateral direction.
When assembling the bottom cover (66) to the feeding case (38), it is possible to easily check the phase and the like from the front side without going around the seedling mounting table (16) side. It is configured to improve handling.

Further, as shown in FIG. 16, in connection with the hose joint (69) and the transfer hose (40), the outlet inner diameter portion (69a) of the hose joint (69).
The outer diameter portion (40a) of the inlet of the transfer hose (40) is directly inserted and coupled without using a separate joint or the like to make a lightweight and compact structure and facilitate the attachment / detachment operation for maintainability. It is configured to improve.

Further, as shown in FIGS. 1 and 19, an air ejection port (125) formed in a taper shape from the air intake side to be joined to the joint pipe (68) toward the air outlet side.
A fertilizer drop opening (127) formed by a cylinder (126) with the inlet (70), and the transfer hose (4)
In the hose joint (69), a confluent delivery port (128) for joining the delivery side to 0) is formed in the hose joint (69), and the ejection port (125) and the delivery port (128) are arranged on substantially the same straight line. The fertilizer drop port (127) is connected to the joint between the jet port (125) and the delivery port (128). Then, the cylinder (126) is inclined in a direction in which the inlet (70) side of the cylinder (126) approaches the air tank (42),
The fertilizer drop port (127) is formed by inclining the hose joint (69) in the opposite direction to the air jet direction from the jet port (125), and the air jetted from the jet port (125) is formed into the drop port (127). ), And the air moves into the fertilizer feeding case (38) from the inlet (70) of the drop opening (127).
It prevents it from blowing inside.

Further, the air ejection port (12
5) The end is opened substantially below the center of the fertilizer drop port (127), and the jet of air from the air jet port (125) causes a negative pressure to the fertilizer drop port (12) toward the merge outlet (128).
The air of (7) is sucked and the air jet port (125)
The merging and discharging port (128) on the downstream side of the merging port (128) is formed in a divergent shape, and a slope (129) inclined downward toward the connecting portion of the transfer hose (40) is formed on the bottom surface of the merging and discharging port (128). 125) Prevents fertilizer accumulation at the bottom of the downstream merge outlet (128).

Further, a hook-shaped protrusion (130) is provided on the outer periphery of the fertilizer drop port (70) of the hose joint (69) connected to the fertilizer feeding case (38), and the protrusion (13) is provided.
0) forming a trapezoidal slope (13) at the opening edge of the cylinder (126).
1) and the outlet (67) of the bottom lid (66)
The inner diameter on the lower end side is formed larger than the inner diameter on the upper end side of the fitting cap (71) to be fitted in, the end surface of the vertical cross section of the fitting cap (71) is trapezoidal, and the lower end side is formed in a divergent shape.
Further, a thick ridge (1
32), a thin projection ridge (133) is provided on the inner periphery of the lower end of the fitting cap (71), and the fitting cap (71) is covered from above on the cylinder (126) of the hose joint (69). At this time, the thick ridge (132) is elastically and closely attached to the trapezoidal slope (131), and the thin ridge (133) is locked to the hook-shaped ridge (130), so that the outlet (67) and the inlet (7).
The gap between 0) is sealed by the fitting cap (71).

Further, as shown in FIG. 20, a cylindrical jet nozzle (134) having one end connected to the air outlet (125) and the other end connected to the merge outlet (128).
Is provided, and the turbulent air from the air jet port (125) is converted into laminar flow air by the jet nozzle (134), and the combined flow outlet (128) is provided.
The air from the air outlet (125) is prevented from being blown out toward the fertilizer drop opening (127), and the fertilizer at the fertilizer drop opening (127) is combined with the combined outlet (12).
It is configured so that the suction force to be moved to 8) can be increased.

[0032]

As is apparent from the above embodiments, the present invention is an air tank (42) for supplying fertilizer-carrying air, a fertilizer feeding case (38) for feeding fertilizer, and a planting section (15).
In a rice transplanter in which a transfer hose (40) for feeding fertilizer to the plant is connected by a hose joint (69), a fertilizer drop port (127) is formed in the direction opposite to the air ejection direction of the hose joint (69). However, air can be prevented from being blown out from the fertilizer drop port (127) of the hose joint (69), and the fertilizer suction force of the fertilizer drop port (127) can be easily increased.

The air outlet (125) of the hose joint (69) is opened substantially at the center of the fertilizer drop opening (127), and the fertilizer drop opening (125) is formed by the jet of air from the air outlet (125). The air on the side 127) is sucked in, the pressure on the fertilizer feeding case (38) side can be maintained at a positive pressure, and the dust of fertilizer that tends to remain can be easily sent out.

In addition, the hose joint (69) is formed such that the downstream side of the air outlet (125) is formed in a divergent shape, and the fertilizer dropped from the fertilizer drop port (127) is placed downstream of the air jet port (125). Can be easily moved,
It is possible to easily prevent the fertilizer accumulation in the downstream portion of the air ejection port (125).

Further, a hook-shaped projection (130) is provided on the outer periphery of the fertilizer drop opening (127) of the hose joint (69) connected to the fertilizer feed case (38). It is possible to easily improve the connection confidentiality of the fertilizer drop opening (127) and simplify the connection structure.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view of a hose joint section.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a plan view of a fertilizer application unit.

FIG. 5 is a rear view of the same.

FIG. 6 is an explanatory side view of the same.

FIG. 7 is an explanatory side view of a lifting rail portion.

FIG. 8 is an explanatory side view of a fertilizer feeding case portion.

FIG. 9 is an explanatory plan view of a fertilizer feeding case portion.

FIG. 10 is a rear view of the base frame portion.

FIG. 11 is a rear view for explaining the fertilizer feeding case portion.

FIG. 12 is a side view illustrating a bearing plate portion.

FIG. 13 is an explanatory plan view of a handle portion.

FIG. 14 is a rear view of the same.

FIG. 15 is an explanatory side view of the same.

FIG. 16 is a sectional side view of a fertilizer feeding case.

FIG. 17 is an explanatory rear view of the same section.

FIG. 18 is an explanatory plan view of the same section.

FIG. 19 is a side view of the hose joint section.

FIG. 20 is a side view showing a modified example of FIG.

[Explanation of symbols]

 (15) Planting part (38) Fertilizer feeding case (40) Transport hose (42) Air tank (69) Hose joint (125) Air jet (127) Fertilizer drop port (130) Hook-shaped protrusion

Claims (4)

[Claims] 1. A rice transplanter in which an air tank for supplying fertilizer-carrying air, a fertilizer feeding case for supplying fertilizer, and a conveying hose for supplying fertilizer to a planting section are connected by a hose joint, and the air of the hose joint is supplied. A rice transplanter characterized by forming a fertilizer drop port in the direction opposite to the direction of jetting. 2. The rice transplanter according to claim 1, wherein the air ejection port of the hose joint is opened substantially at the center of the fertilizer dropping port. 3. The rice transplanter according to claim 1, wherein a downstream side of the air outlet of the hose joint is formed in a divergent shape. 4. A rice transplanter characterized in that a hook-shaped projection is provided on the outer periphery of the fertilizer drop opening of a hose joint connected to the fertilizer feeding case.