JPH10276521A - Rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a rice transplanter by which speed changing structure is simplified, temp. raising inside a speed changing case is prevented and operation efficiency and a durability are improved by providing a blowing machine for supplying cooling air to the case. SOLUTION: The speed changing case 45 where a continuously variable speed changing belt 57 for transmitting an engine output and continuously variable speed changing pulleys 55 and 56 are internally provided is provided and also the blowing machine 73 for supplying cooling air to the speed changing case 455 is provided. Preferably, the blowing machine 73 is arranged between main frames 3 and a sub-frame 75, the main frames 3 are connected to the intake side of the blowing machine 73 by a hose 80, the speed changing case 45 is connected to the discharge side of the blowing machine 73 by the hose 77 and the blowing machine 73 is driven or stopped by the driving or stopping operation of a planting part.

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 a seedling mounting table and planting claws for continuously performing seedling planting operations.

[0002]

Conventionally, when a continuously variable transmission belt and a continuously variable transmission pulley for transmitting an engine output are provided in a transmission case, it is necessary to cool the pulley and the belt by ventilation inside the transmission case. However, there is a problem that the speed inside the transmission case becomes high due to high load operation such as a seedling planting operation and the durability of the belt is reduced, or the transmission case becomes large by preventing the temperature from rising, and the There are problems that it is not easy to improve the durability of the belt and to simplify the transmission structure.

[0003]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a continuously variable transmission belt and a continuously variable pulley for transmitting engine output in a rice transplanter in which a planting section is mounted on a traveling vehicle to perform seedling planting work. A shift case to be installed inside and a blower to supply cooling air to the shift case are provided, and the internal temperature of the shift case can be easily prevented from rising by putting outside air from the blower into the shift case and forcibly ventilating it. Further, it is possible to easily improve the durability of the continuously variable transmission belt, improve the continuously variable transmission function, simplify the continuously variable transmission structure, and reduce the size of the transmission case.

Further, a blower is installed between a main frame and a sub-frame constituting a traveling vehicle. The blower can be attached by using the main frame or the sub-frame, and the support structure can be simplified easily. By surrounding the blower with the main frame and the sub-frame, it is possible to eliminate the problem that the blower collides with a ridge or the like and is damaged.

[0005] Further, since the main frame constituting the traveling vehicle and the suction side of the blower are connected by a hose, the relative arrangement structure between the main frame and the blower can be easily simplified, and the blower mounting structure can be simplified. It is possible to easily improve the attachment / detachment operability.

In addition, since the transmission case and the discharge side of the blower are connected by a hose, the relative arrangement structure of the transmission case and the blower can be easily simplified, and the mounting structure or the attachment / detachment operation of the transmission case and the blower can be alternately performed. This can eliminate the problem limited to the above.

In addition, the blower is driven or stopped by driving or stopping the planting section, so that the blower can be operated only at the time of planting work under high load operation, thereby improving the operating efficiency of the blower. In addition, it is possible to easily prevent forgetting to drive or stop the blower.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a side view of the entire riding rice transplanter, FIG.
Fig. 1 shows a plan view of the same, in which (1) is a traveling vehicle on which an operator rides, in which an engine (2) is mounted on a main frame (3), and a front axle case (5) is provided in front of a transmission case (4). And a rear axle case (7) is connected to the rear of the transmission case (4), and a paddy traveling rear wheel (8) is mounted on the rear axle case (7). Let them support you. A spare seedling mounting table (10) is attached to both sides of the hood (9) covering the engine (2) and the like, and the transmission case (12) is mounted by a body cover (12) on which an operator rides via a footrest (11). 4) and the like, a driver's seat (13) is mounted above the vehicle body cover (12), and a steering handle (14) is provided in front of the driver's seat (13) and behind the hood (9).

[0009] In the figure, (15) is a planting section provided with a seedling mounting table (16) for planting 10 rows and planting claws (17) for 10 rows. The forward tilting seedling platform (16) made of steel is connected to the lower rail (18) and the guide rail (1).
9) through the planting case (20) so as to be reciprocally slidable left and right, and a rotary case (21) rotating at a constant speed in one direction is supported by the planting case (20). ), A pair of claw cases (22) and (22) are arranged at symmetric positions about the rotation axis center of the claw case (2).
2) Attach the planting claws (17) and (17) to the tip of (22). A hitch bracket (24) is provided on the front side of the planting case (20) via a rolling fulcrum shaft (23), and a quick hitch of a lifting link mechanism (27) including a top link (25) and a lower link (26). (24
a) a hitch bracket (24), and an elevating cylinder (28) for elevating and lowering the planting portion (15) via the link mechanism (27) to a lower link (26); At the same time as (8) is driven and moved, a seedling for one strain is taken out from the seedling mounting table (16) which is reciprocally slid left and right by a planting claw (17), and the seedling is continuously planted. To be configured.

In the figure, (29) is a main shift lever, (3)
0) is a setting lever for performing each operation of sub-shifting, setting and disengaging of the setting clutch, and setting and lowering of the setting, (31) is a setting sensitivity adjustment lever, (32) is a main clutch pedal, (33) and (33) are left and right brakes Pedal, (34) is a two-floor leveling center float, (35) is a two-floor leveling side float,
(36) is a side-row fertilizer for 10 rows.

Further, as shown in FIGS. 3 to 7, a pair of left and right main frames (3) (3) made of a square pipe which is inclined to the front low and rear high (the inclination angle is about 4 degrees) is provided with a gantry ( 37), the engine (2) is mounted on the front of the left and right main frames (3) and (3) via a mount (37), and a fuel tank (38) is provided on the left side of the engine (2).
A muffler (39) is mounted on the right side of the engine (2), and a cylindrical bearing (40), which is substantially horizontal in the front-rear direction, is fixed to the lower side of the mount (37) by welding. A counter shaft (41) is inserted through and supported by 40), and a counter pulley (42) is attached to the front end of the counter shaft (41) projecting forward from the bearing body (40). Further, an output shaft is protrudingly provided in front of the engine (2) to form an output pulley (4).
3) is attached, and the output pulley (43) is connected to the counter pulley (42) by a V-belt.

Further, a rear axle case (7) is bolted and fixed to the rear end of the vehicle body frame (3), and a transmission case (4) rear surface is connected and fixed to a front surface of the rear axle case (7). ), A clutch case (44) is integrally formed on the right front surface, and a transmission case (45) is provided on the front surface of the clutch case (44).
The right rear surface is fitted and fixed, and a hydraulic pump (46) for operating the elevating cylinder (28) is fixed to the left rear surface of the speed change case (45), and between the left and right main frames (3) and (3). In each case (4), (44), (4)
5) and the hydraulic pump (46) are arranged, and the transmission shaft (47) with the universal joint is connected to the counter shaft (4).
1) Provided between the rear end and the transmission case (45) to transmit the output of the engine (2) to the transmission case (45) and to connect the front wheel transmission shaft (48) between the front axle case (5) and the transmission case (4). Provided, mission case (4)
Is transmitted to the front and rear wheels (6) and (8) via the respective axle cases (5) and (7).

A lower link fulcrum shaft (49) is provided at the rear end of the vehicle body frame (3). The front end of the lower link (26) is attached to the fulcrum shaft (49). ) At the rear end, a square pipe-shaped left and right support (50) (50) is erected, and the left and right support (50) (5)
0) Deformed square pipe type link frame between upper ends (51)
And the front end of the top link (25) is attached to the link frame (51) via the top link fulcrum shaft (52).

A pedal fulcrum pipe (53) provided with the brake pedal (33) is provided. The pipe (53) is inserted through the left and right main frames (3) and (3). The pipes (53) are fixed to the main frames (3) and (3) by welding, and are connected to the left and right main frames (3) and (3), and the left and right cylinder frames (54) ( 54), and the front end of the cylinder frame (54) which is inclined at the front low and rear high positions is connected to the pedal fulcrum pipe (5).
3), and the rear end of the cylinder frame (54) is welded and fixed to the link frame (51).

Further, as shown in FIGS. 8 to 10, the input / output continuously variable speed pulleys (55) and (56) for continuously changing the speed ratio by changing the winding diameter and the continuously variable speed belt (5).
7) is installed inside the transmission case (45), and the transmission case (4) is
5) The front end of the input shaft (58) which is the pulley shaft is connected to the rear end of the counter shaft (41), the hydraulic pump (46) is directly connected to the rear end of the input shaft (58), and the clutch pedal (32). A multi-disc friction type dry clutch which is intermittently operated is provided in a clutch case (44), and an output shaft (59) of a transmission case (45) is connected to an input shaft of a transmission case (4) via the clutch case (44). Connected.

Also, a tension roller (60), input / output cams (61) (62) for changing the belt winding diameter of the input / output continuously variable speed pulleys (55) (56), and each cam (61) (62) I / O roller (63) to be brought into contact with 62)
(64), and a speed change arm (66) is provided on the speed change case (45) via a speed change shaft (65), and each input / output is provided to the speed change shaft (65) via the speed change arm (66). The cams (61) and (62) are connected, and the planting lever (30) is connected to the speed change shaft (65). By operating the lever (30), input and output around the input and output shafts (58) and (59) are performed. By rotating the cams (61) and (62) to change the width of the continuously variable transmission pulleys (55) and (56) and the winding diameter of the continuously variable transmission belt (57),
5) The gear ratio of the (56) and the belt (57) is continuously changed.

Further, a tension arm (67) middle is rotatably mounted on the output shaft (59) shaft center, and a tension roller (60) is rotated on one end side of the arm (67) via a shaft (68). A tension spring (69) is connected to the other end of the arm (67), the tension spring (69) is supported in a tensioned state, and the tension roller (60) is connected to the continuously variable transmission belt (5).
7) so that the tension of the continuously variable transmission belt (57) is maintained at a predetermined value or more.

As shown in FIGS. 5 to 9, an intake fan (7) is provided on the front side of the continuously variable output pulley (56).
0), and an intake pipe (71) is integrally formed on the right side wall of the transmission case (45) on the right side of the pulley (56). A blower fan (73) having an electric blower motor (72) is provided, and the front and rear ends of a pipe frame (74) are fixed to a front axle case (5) mounting portion and a rear axle case (7).
4) The sub-frame (75) is connected to the intermediate part, and the sub-frame (75) is extended to the outside of the machine, so that the footrest (11)
The blower fan (73) is mounted in a closed space surrounded by the right main frame (3) right outside of the machine and the sub-frame (75). The exhaust port (76) of the blower fan (73) and the intake pipe (71) are connected to each other by a flexible intake pipe (77) made of rubber, and are integrally formed on the right side of the right main frame (3). The air inlet (78) to be connected to the air inlet (79) of the blower fan (73) is connected by a flexible intake pipe (80) made of rubber, and the air in the hollow portion of the right main frame (3) is blown. The fan (73) sends air to the continuously variable output pulley (56) inside the transmission case (45) by the wind force and the suction force of the intake fan (70).

As is apparent from the above description, in a rice transplanter in which a planting section (15) is mounted on a traveling vehicle (1) to perform a seedling planting operation, a continuously variable transmission belt (57) for transmitting the output of an engine (2). ) And a continuously variable pulley (55) (56) are provided inside the transmission case (45), and the transmission case (45) is provided with a blower fan (73) as a blower for supplying cooling air. A blower fan (7
3) Forcibly ventilating by introducing outside air to easily prevent the rise in the internal temperature of the transmission case (45), improve the durability of the continuously variable transmission belt (57), improve the continuously variable transmission function, and continuously variable transmission structure. And a transmission case (45) is downsized, and a blower fan (73) is installed between the main frame (3) and the sub-frame (75) constituting the traveling vehicle (1). The main frame (3) or the sub-frame (75) is used to attach the blower fan (73) to simplify the support structure, and the main frame (3) and the sub-frame (75) provide the blower fan (7).
By surrounding 3), the blower fan (73) is configured so as to eliminate the problem that the blower fan (73) collides with a ridge or the like and is damaged.

Further, the main frame (3) constituting the traveling vehicle (1) and the suction side of the blower fan (73) are connected by an intake pipe (80) as a hose, and the main frame (3) and the blower fan (73) are connected. ) Can be simplified, the mounting structure of the blower fan (73) can be simplified, the operability can be improved, and the exhaust side of the transmission case (45) and the blower fan (73) can be a hose. Tube (7
7), the relative arrangement structure between the transmission case (45) and the blower fan (73) can be simplified, and the mounting structure or the attachment / detachment operation between the transmission case (45) and the blower fan (73) is restricted to each other. Is configured to eliminate the inconvenience.

Further, lids (81) and (82) are integrally fixed to the front and rear end openings of the left and right main frames (3) and (3) to form a hollow portion of the main frame (3) in a closed space and to form a right main frame (3). 3) Rear upper surface and right support (5
0) Vent holes (83) and (84) are formed on the side surface of the upper end portion, and the hollow portion of the square pipe-shaped right support (50) and the right main frame (3) communicate with each other through the vent (83). (50) The hollow portion of the right support (50) and the hollow portion of the link frame (51) are communicated with each other through the ventilation hole (84) on the side surface of the upper end portion. On the other hand, an intake hole (85) is formed in the bottom surface of the link frame (51), and the hollow portion of the link frame (51) communicates with the outside through the intake hole (85) that opens downward. Then, external cool air taken into the hollow portion of the link frame (51) from the intake hole (85) having the downward opening is blown through the ventilation holes (83) and (84), the right support (50), and the right main frame (3). It is configured to be taken into the fan (73) and sent from the blower fan (73) to the speed change case (45).

Further, as shown in FIGS. 6, 8 to 10, an exhaust fan (86) is integrally formed on the rear surface side of the continuously variable input pulley (55), and a transmission case (55) on the left side of the pulley (55). 45) An exhaust pipe (87) is integrally formed on the left side wall. Also, the exhaust pipe (87) and the exhaust inlet (88) integrally formed on the left side of the left main frame (3).
Are connected to each other by a flexible exhaust pipe (89) made of rubber, and the warm air inside the transmission case (45) is exhausted by the exhaust fan (8).
6) The left main frame (3) is configured to be delivered to the hollow portion by the exhaust force.

Also, ventilation holes (90) (9) are formed on the rear upper surface of the left main frame (3) and the upper side surface of the left support (50).
1) is formed, the hollow portion of the square pipe-shaped left support (50) and the hollow portion of the left main frame (3) communicate with each other through a vent (90). This allows the hollow portion of the left support (50) to communicate with the hollow portion of the link frame (51). On the other hand, an exhaust hole (92) is formed in the bottom surface of the link frame (51), and the link frame (5) is formed through the exhaust hole (92) that opens downward.
1) An intake chamber (94) that connects the hollow portion to the outside and separates the hollow portion of the link frame (51) into right and left by a partition plate (93) to form the intake hole (85).
And an exhaust chamber (95) forming the exhaust hole (92),
The link frame (51) is formed in a hollow portion. Then, the link frame (5) is passed through the left main frame (3), the left support (50), and the ventilation holes (90) (91).
1) It is configured such that warm air from the transmission case (45) sent out to the hollow portion is discharged outwardly below the link frame (51) from the exhaust hole (92) having the downward opening.

As is apparent from the above description, in a rice transplanter in which a planting section (15) is mounted on a traveling vehicle (1) to carry out seedling planting, a continuously variable transmission belt (57) for transmitting the output of an engine (2). ) And the continuously variable transmission pulleys (55) and (56) are installed inside the transmission case (45), and the transmission case (45) is installed inside the left and right main frames (3) and (3) of the traveling vehicle (1). By using the left and right main frames (3) and (3), the speed change case (45) can be ventilated, and cooling air to be taken into the speed change case (45) is introduced from the front end of the main frame (3) to allow muddy water to enter. The configuration is such that troubles are eliminated, the mounting structure of the transmission case (45), the ventilation cooling structure, and the like are simplified, and intrusion of muddy water and the like is prevented.

The transmission case (45) is connected to one main frame (3) via a flexible intake pipe (77), and the transmission case (45) is connected via a flexible exhaust pipe (89).
Can be communicated with the other main frame (3), the connection structure for communicating the transmission case (45) with the main frame (3) can be simplified, the operation of attaching and detaching the transmission case (45) can be improved, and the transmission case ( 45) An intake hole (85) for taking in external cool air is formed above the main frame (3), and an exhaust hole (92) for discharging warm air inside the transmission case (45) is formed in the main frame (3). Inlet (85) formed above to prevent muddy water from entering
In addition, the waterproof structure of the exhaust hole (92) can be simplified.

A link frame (51) for mounting the planting portion (15) is erected on the main frame (3), and at least one of an intake hole (85) and an exhaust hole (92) communicating with the transmission case (45) is provided. One is formed in the link frame (51), and the link frame (51) is also used as a ventilation duct for the transmission case (45).
5) The ventilation cooling structure can be simplified and the intrusion of muddy water can be prevented, and the intake hole (85) or the exhaust hole (92) communicating with the transmission case (45) faces downward at a higher position than the main frame (3). To prevent muddy water splashed during seedling planting work in a fukada or wetland, or water splashed from a car wash, etc. from entering the transmission case (45) through the intake hole (85) or the exhaust hole (92). The transmission case (45) is configured so as to be able to improve ventilation cooling efficiency and prevent intrusion of rainwater and the like.

Further, as shown in FIGS. 9 and 10, the outer peripheral air guide (96) and the auxiliary guide (97) extending around the exhaust fan (86) of the continuously variable input pulley (55) are changed. While being integrally formed with the case (45),
An inner-circumferential air guide (98) extending to the inner periphery of the exhaust fan (86) of the input continuously variable speed pulley (55) is integrally formed with the speed-change case (45). In addition, the outer peripheral air guide body (9
The extended end of (6) is connected to the lower edge side of the opening of the exhaust pipe (87), and the delivery guide body (9) for guiding the internal warm air delivered by the exhaust fan (86) to the exhaust pipe (87).
9) is integrally formed with the transmission case (45), and the extended end of the inner peripheral air guide body (97) is connected to the upper edge side of the opening of the exhaust pipe (87) via the delivery guide body (99). I have. The transmission case (45) surrounded by the arc-shaped left side wall (100) of the transmission case (45) integrally forming the exhaust pipe (87) and the outer peripheral air guide body (96) and the auxiliary guide body (97). A ventilation fan chamber (101) is formed in the internal space, the exhaust fan (86) is provided in the ventilation fan chamber (101), and an exhaust air path (102) communicating the exhaust side to the exhaust pipe (87). ),
Outer peripheral air guide body (96) and inner peripheral air guide body (98)
And a transmission case (45) formed between the delivery guide body (99) and the tension roller (60). The suction side of the exhaust passage (102) is opened substantially upward in the center of the transmission case (45). The exhaust fan (86) is rotated in a counterclockwise direction as viewed from the front in the blower fan chamber (101) whose front and rear are closed by the rear surface of the input continuously variable speed pulley (55) and the rear side wall of the speed change case (45). The warm air inside the speed change case (45) is sucked into the blower fan chamber (101) from the suction port (103) formed between the body (96) and the auxiliary guide body (97), and the warm air inside the transmission case (45) is exhausted (102). Through the exhaust pipe (87).

As is apparent from the above description, in a rice transplanter in which a planting section (15) is mounted on a traveling vehicle (1) to perform a seedling planting operation, a continuously variable transmission belt (57) for transmitting the output of an engine (2). ) And the continuously variable speed pulleys (55) and (56) are provided inside the speed change case (45), and the blower fan chamber (101) is provided between the speed change case (45) and the continuously variable speed pulley (55).
Is formed, and warm air inside the speed change case (45) is sucked into the blower fan chamber (101) to thereby change the speed change case (4).
5) The shift case (45) is efficiently exhausted to the outside.
The external exhaust air is efficiently introduced into the transmission case (45) by improving the exhaust efficiency of the transmission case (45), the temperature inside the transmission case (45) is prevented from rising, and the durability of the continuously variable transmission belt (57) is improved. (45) The transmission case (45) is configured to be small in size without specially forming a ventilation space inside, and the transmission case (45) improves the efficiency of exhausting warm air inside and improving the ventilation efficiency of taking in external cool air, and The configuration is such that the continuously variable transmission structure can be made compact and the continuously variable transmission performance can be improved.

Further, external cooling air is sucked in from one side of the transmission case (45) and internal warm air is exhausted from the other side, and a blower fan chamber (101) is provided on the internal warm air discharging side of the transmission case (45). The external cooling air can be efficiently taken into the transmission case (45), which becomes negative pressure by the forced discharge of the internal warm air, and the ventilation efficiency of the transmission case (45) can be improved, and the input continuously variable transmission pulley (55) can also be used. An exhaust fan (86), which is a blower fan, is formed so that the exhaust fan (86) can be driven at a stable rotation speed before the stepless speed change. It is configured to maintain ventilation performance by rotation.

Further, an outer peripheral air guide (96) extending around the outer periphery of the exhaust fan (86) is provided in the transmission case (45) to simplify the structure of the air blow fan chamber (101) and improve the air blow function. And an inner peripheral air guide body (98) extending to the inner periphery of the exhaust fan (86).
5), which facilitates simplification of the structure of the blower fan chamber (101) and improvement of the blower function, etc., and leads the internal warm air sent by the exhaust fan (86) to the exhaust pipe (87) which is the outlet. The transmission guide body (99) is provided in the speed change case (45), and warm air taken in the blower fan chamber (101) is prevented from returning to the inside of the speed change case (45) by the transmission guide body (99). The system is configured to prevent the circulation of warm air and to provide efficient ventilation.

Further, as shown in FIG. 11, the blower motor (72) is provided with a blower switch (105) for applying the drive power (104), and the planting lever (3) is provided.
0) is connected to the blower switch (105), the blower switch (105) is turned off by the planting clutch disengagement operation of the planting lever (30), and the blower fan (73) is operated by the stop operation of the planting section (15). On the other hand, the blower switch (105) is turned on by operating the planting lever (30) into the planting clutch, and the blowing fan (73) is driven by the driving operation of the planting unit (15). The fan (73) is configured to be driven or stopped by the driving or stopping operation of (15), and the fan (73) is operated only during the planting operation in which high load operation is performed. The configuration is such that the operation efficiency can be improved and the blower fan (73) can be prevented from being forgotten to be driven or stopped.

Further, as shown in FIG. 12, a plurality of mat-shaped planting seedlings (106) for one row are placed on the upper and lower tiers, and the seedling rack for automatically replenishing the upper seedling (106) at the bottom. (1
07), in which the seedling rack (107) is detachably mounted on the planting section (15) in place of the seedling rack (16) shown in FIG. 1, and the seedling rack (107) is replaced. The seedlings are replenished and the number of seedlings is reduced as compared with the structure of FIG. 2, and the seedling rack (107) is used as a seedling raising shelf to efficiently transport the seedlings between the seedling raising facility and the field. It is configured as follows.

[0033]

As is apparent from the above embodiments, the present invention provides a rice transplanter for performing seedling planting work by mounting a planting section (15) on a traveling vehicle (1) and transmitting an engine (2) output. Continuously variable speed belt (57) and continuously variable speed pulley (5)
5) A transmission case (45) in which the (56) is provided, and a blower (73) for supplying cooling air to the transmission case (45) are provided. ), Forced ventilation with outside air can easily prevent the internal temperature of the transmission case (45) from rising,
The durability of the continuously variable transmission belt (57) is improved, the continuously variable transmission function is improved, the continuously variable transmission structure is simplified, and the transmission case (4) is improved.
It is possible to easily reduce the size of 5).

A blower (7) is provided between the main frame (3) and the sub-frame (75) constituting the traveling vehicle (1).
3) is installed, and the blower (73) is attached using the main frame (3) or the sub-frame (75), so that the support structure can be simplified easily and the main frame (3) By surrounding the blower (73) with the sub-frame (75), the blower (73)
This can eliminate the problem of damage caused by collision with ridges.

A hose (80) connects the main frame (3) constituting the traveling vehicle (1) and the suction side of the blower (73).
, It is easy to simplify the relative arrangement structure of the main frame (3) and the blower (73), and it is easy to simplify the mounting structure of the blower (73) and to improve the detachability. It can be planned.

The transmission case (45) and the blower (7)
Since the discharge side of 3) is connected by a hose (77), the relative arrangement structure between the transmission case (45) and the blower (73) can be easily simplified, and the transmission case (4) can be simplified.
5) It is possible to eliminate the problem that the mounting structure or the attaching / detaching operation of the blower (73) and the blower (73) are mutually restricted.

Further, the blower (73) is driven or stopped by driving or stopping the planting section (15), and the blower (73) is operated only during the planting operation in which high load operation is performed. The blower (7
3) It is possible to easily improve the operation efficiency and prevent forgetting to drive or stop the blower (73).

[Brief description of the drawings]

FIG. 1 is an overall side view of a riding rice transplanter.

FIG. 2 is an overall plan view of the riding rice transplanter.

FIG. 3 is a side view of the traveling vehicle.

FIG. 4 is a plan view of the traveling vehicle.

FIG. 5 is an explanatory side view of a rear portion of the traveling vehicle.

FIG. 6 is an explanatory plan view of a rear portion of the traveling vehicle.

FIG. 7 is an explanatory right side view of a transmission case portion.

FIG. 8 is an explanatory front view of a transmission case portion.

FIG. 9 is an explanatory sectional plan view of a transmission case portion.

FIG. 10 is an enlarged front view of the input continuously variable speed pulley.

FIG. 11 is an explanatory diagram of blower fan control.

FIG. 12 is an overall side view showing a modification.

[Explanation of symbols]

 (1) Traveling vehicle (2) Engine (3) Main frame (15) Planting part (45) Transmission case (51) Link frame (55) Input continuously variable speed pulley (56) Output continuously variable speed pulley (57) None Step shifting belt (73) Blower fan (blower) (77) (80) Flexible intake pipe (hose)

Claims (5)

[Claims] 1. A rice transplanter for planting seedlings with a planting section mounted on a traveling vehicle, comprising a continuously variable transmission belt for transmitting engine output and a variable speed case for internally incorporating a continuously variable transmission pulley. A rice transplanter characterized by having a blower for supplying cooling air to a transmission case. 2. The rice transplanter according to claim 1, wherein a blower is installed between the main frame and the sub-frame constituting the traveling vehicle. 3. The rice transplanter according to claim 1, wherein a main frame constituting the traveling vehicle and a suction side of the blower are connected by a hose. 4. The rice transplanter according to claim 1, wherein a transmission case and a discharge side of the blower are connected by a hose. 5. The rice transplanter according to claim 1, wherein the blower is driven or stopped by driving or stopping the planting section.