JP2006248496A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding rice transplanter equipped with a steering post having good operability. <P>SOLUTION: The riding type rice transplanter is provided with the steering post rotating at an upper part on a machine body frame at a front end portion of a traveling portion, and a steering wheel at the upper part of the steering post. The riding type rice transplanter can be operated at an operating position at the time of riding operation of the steering wheel, at a front operation position rotated from the position, and at a position in a middle part and where an operator gets off to operate the steering wheel. At the front operation position, the steering wheel and a traveling wheel is preferably locked. The upper part of the steering post is rotated by an universal joint. The steering wheel is preferably locked at an angle not less than an angle with which the universal joint cannot rotate. By a rotation angle of the steering wheel, the rotations of the upper part of the steering post is regulated, so that the rotations can be regulated by a simple method. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a steering post and a steering wheel portion of a traveling portion of a riding rice transplanter, and the like, which mainly has a function of preventing the traveling portion from being lifted, similarly to an arm body provided at a front end portion of a conventional riding rice transplanter. .

Conventionally, as a form of riding rice transplanter, there is one in which a planting part is connected to a rear position of a traveling part so as to be movable up and down, and an arm body is attached to a front end of the traveling part.
The arm body can be rotated between a use position that protrudes forward and a non-use position that rises upward, for example, when the machine body is moved over the shore so as to escape from the field. In addition, the operator can get off the airframe and move up to the heel, and can also prevent the front part of the airframe from being lifted by rotating the arm body to the use position and pressing the arm body downward. It was like that.
Technologies related to this are disclosed, for example, in Patent Documents 1 and 2 below.
JP 2000-135209 A JP 2000-127983 A

However, in the riding rice transplanter disclosed in Patent Document 1 and the like, the arm body can be prevented from being lifted by pressing the arm body downward. However, when the body is escaped from the field, When the front part of the machine body is pulled up through the arm body, the arm body turns upward, and it is difficult to lift the machine body through the arm body.
Further, since the arm body is provided exclusively, the number of parts increases and there is an economical loss.

  Therefore, the present invention provides a function that can control the traveling of the aircraft from the front end of the riding rice transplanter by using the steering post and the steering wheel of the traveling portion of the riding rice transplanter and at the same time prevent the traveling portion from being lifted. The main issue is to provide the products.

In the present invention, the planting part is connected to the rear of the traveling part so that the planting part can be moved up and down, a steering post is provided at the front end of the traveling part and the upper part is rotated, and the steering wheel is provided at the upper part of the steering post. A rice transplanter that is excellent in operability and includes a steering wheel operation position during riding operation, a forward operation position rotated from the steering wheel, and a position at which the steering wheel is lowered to operate the steering wheel. It is to provide.
In the forward operation position, it is useful for work if the steering wheel and the traveling wheel are locked.
The upper part of the steering post may be rotated by providing a universal joint to rotate the upper part, and the steering wheel may be locked at an angle greater than the angle at which the universal joint cannot rotate.
Further, since the rotation of the upper portion of the steering post is regulated by the rotation angle of the steering wheel, regulation by a simple method can be performed.

  According to the invention of claim 1, the traveling vehicle can be operated from the operation position at the time of riding operation of the steering wheel, the front operation position rotated from there, and the position at which the vehicle gets off and operates the steering wheel. In the forward operation position, it is useful for climbing over a paddy to get out of the field and for loading and unloading a rice transplanter onto a truck. In the intermediate position, it is possible to get off and operate the steering wheel.

  According to the invention of claim 2, since the steering wheel and the traveling wheel are locked at the forward operation position, the steering wheel is not turned from the traveling wheel side due to, for example, a field scene or unevenness of the road surface. It is useful for work that does not require a sudden steering operation, such as prevention of lifting of the traveling vehicle when going over a fence or when loading or unloading a truck.

  According to the invention of claim 3, the upper part of the steering post is rotated by providing a universal joint, and the upper part is rotated, and the steering wheel is locked at an angle greater than the angle at which the universal joint cannot rotate. Therefore, the rotation can be performed smoothly.

  According to the fourth aspect of the present invention, since the rotation of the upper portion of the steering post is restricted by the rotation angle of the steering wheel, the rotation can be restricted by a simple method.

Embodiments of the present invention will be described below with reference to the drawings.
A shown in FIG. 1 is a riding rice transplanter according to the present invention. The riding rice transplanter A is connected to a rear position of the traveling unit 1 through a lifting mechanism 3 so that the planting unit 2 can be moved up and down. .

  As shown in FIG. 1, the traveling vehicle 1 is provided with a prime mover portion 5 on the front portion and a driving portion 6 at a rear position of the prime mover portion 5 on the fuselage frame 4. A transmission case 7 extending in the direction and interlockingly connected with the engine E of the prime mover unit 5 is disposed, and a pair of left and right front wheels 8 and 8 are interlockingly connected to the front part of the transmission case 7 via front axle cases 21 and 21. In addition, a pair of left and right rear wheels 9, 9 are interlocked and connected to the rear part of the transmission case 7.

  As shown in FIG. 1, the body frame 4 includes a pair of left and right front and rear extension frame forming pieces 10 and 10 extending in the front and rear direction, and the left and right sides of the mission case 7 from the rear ends of the front and rear extension frame forming pieces 10 and 10. Inclined frame forming pieces 11 and 11 extending obliquely toward the rear, and left and right extending frame forming pieces 12 horizontally mounted between the upper end portions of both inclined frame forming pieces 11 and 11, are provided. The rear portions 10a and 10a of the formed pieces 10 and 10 are extended to the rear upper side to be inclined.

As shown in FIG. 1, the driving unit 6 is provided with a steering column 13 immediately before the prime mover unit 5, a steering post 70 is erected in the steering column 13, and a steering wheel is disposed at the upper end of the steering post 70. 15, the engine E is disposed behind the steering post 70, and the seat 16 is disposed behind the engine E.
That is, the engine is installed between the point of the perpendicular line dropped from the rearmost end of the steering wheel to the body frame during riding operation and the point on the body frame of the steering post so that the traveling vehicle 1 does not extend the entire length. The vehicle can be made compact, and an ideal steering angle can be obtained during running and operation, so that operability and comfort can be improved.
The steering post 70 includes a lower fixed portion 72 and an upper rotating portion 74, and a gear portion 90 between the fixed portion 72 and the upper rotating portion 74.
As shown in FIG. 1, the steering post 70 can be rotated to the use positions (A), (B), and (C).

A shift lever 17 for performing a shift operation of the traveling unit 1 and a clutch / brake lever 18 that can perform a clutch operation and a brake operation from outside the airframe are respectively provided on the panel 80 above the steering column 13. While being provided so as to be swingable in the front-rear direction, the planting lift lever 19 and the differential lock lever 20 for performing the lifting operation of the planting part 2 can be swingably operated in the front-rear direction at the right side position of the seat 16. Provided.
The planting lift lever 19 may be provided on the panel 80 in the same manner as the above-described shift lever 17 and the like, so that the planting lift lever 19 can be operated at an intermediate use position (b) of the steering wheel 15. Further, the differential lock lever 20 may be disposed on a step covering the body frame 4 as a stepping pedal type.

Further, a steering mechanism 22 is interposed between the lower end of the fixed portion 72 at the lower portion of the steering post 70 and the front end portions of the front axle cases 21 and 21 (see FIG. 3).
In other words, the steering mechanism 22 moves the middle part of the steering operation arm 24 up and down on the support frame 23 interposed between the front part of the pair of left and right front and rear extension frame forming pieces 10 and 10 and the front end part of the transmission case 7. The arm pivot shaft 25 is pivotally supported by an arm pivot shaft 25, and an arcuate internal gear 26 centering on the arm support shaft 25 is connected to the rear portion of the steering operation arm 24. A small gear 27 attached to the lower end portion of the steering post 70 is engaged with the toothed gear 26.
A pair of left and right tie rods 29 and 29 are interposed between the left and right sides of the front end of the steering operation arm 24 and the knuckle arms 28 and 28 provided at the front ends of the front axle cases 21 and 21, respectively.

  In this manner, in the steering mechanism 22, the steering operation arm 24 is rotated about the arm support shaft 25 in conjunction with the rotation operation of the steering wheel 15, and the pair of left and right tie rods are interlocked with the steering operation arm 24. 29 and 29 are pushed and pulled, and the front end portions of the front axle cases 21 and 21 are rotated via the knuckle arms 28 and 28 so that the steering operation of the pair of left and right front wheels 8 and 8 is performed.

  As shown in FIG. 6, the transmission case 7 is provided with a pair of left and right front wheel drive shafts 30, 30 with the axis lined in the left-right direction at the front, A differential lock mechanism 32 is disposed in the vicinity of the differential mechanism 31 with a mechanism 31 interposed therebetween, and a lower end portion 33a of an operation shaft 33 provided on the differential lock mechanism 32 projects downward from the transmission case 7 to The intermediate portion of the interlocking lever 44 extending in the left-right direction is connected to 33 a, and the differential lock lever 20 provided in the operating portion 6 is interlockedly connected to the negative side end portion of the interlocking lever 44 via the interlocking wire 45.

An input shaft (156) is pivotally supported in the left-right direction at the upper part of the transmission chamber of the transmission case (7).
As shown in FIG. 4, the left end portion of the input shaft (156) protrudes outward and the driven pulley (155) is fixed, and the output shaft (152) protrudes laterally from the left side surface of the engine E. The power from the fixed drive pulley (153) is input into the transmission case (7) via the belt (154). The belt (154) is configured to be tensioned by a tension roller (158) attached to the tip of the tension arm (157). The belt clutch (154) can be depressed by the main clutch pedal (174) or the clutch / brake lever (18). The power is connected and disconnected in conjunction with the shift operation.

  In addition, as described above, the tension of the belt (154) that transmits power from the engine E to the transmission case (7) by the operation of the main clutch pedal (174) and the clutch / brake lever (18) is in the “off” state. It is configured to be able to. That is, as shown in FIG. 4, when the main clutch pedal (174) is depressed, a pressing member (145) such as a pin attached to an L-shaped bracket (144) fixed to the pedal support (174a) By pushing the cam (146) fixed to the rotation shaft (159) of the tension arm (157), the tension arm (157) is rotated downward, and the belt tension can be set to the “cut” state.

  As shown in FIG. 4, a long hole (140a) is provided in the interlocking rod (140) pivotally supported by a bracket (142) provided on the pivot shaft (141) of the clutch / brake lever (18). Is inserted, and a fitting member (143) such as a pin projecting from a tension arm (157) for "entering" or "cutting" the belt tension is inserted through the elongated hole (140a). Therefore, when the clutch / brake lever (18) is rotated backward in the direction of the arrow shown in the drawing, the interlocking rod (140) moves downward and the fitting member (143 inserted through the elongated hole (140a) is inserted. ) To rotate the tension arm (157) downward to release the tension roller (158) attached to the tension arm (157) from the belt (154), thereby turning the belt tension to the “off” state. Can do. Even if the main clutch pedal (174) is depressed, the fitting member (143) of the tension arm (157) only moves within the long hole (140a) formed in the interlocking rod (140). 18) has no effect, and operating the clutch / brake lever (18) has no effect on the main clutch pedal (174).

Further, as shown in FIG. 4, a brake member (147) for stopping the rotation of the driven pulley (155) on the mission case (7) side is fixed to the tension arm (157). 147) is configured to press the driven pulley (155) when the tension arm (157) rotates downward.
The pressing portion of the brake member (147) is composed of an elastic body (149) such as rubber urged toward the driven pulley (155) by a spring (148) or the like (see FIG. 5). It is configured to be more retractable. Thus, when the elastic body (149) of the brake member (147) presses the driven pulley (155) to stop the rotation and the entire body is braked, the traveling vehicle (1) can be moved even on a slope. Can be stopped.

As described above, the interlocking rod (140) pivotally supported by the bracket (142) moves downward, and the tension arm (157) is moved through the fitting member (143) inserted through the long hole (140a). By rotating downward, the tension roller (158) attached to the tension arm (157) can be separated from the belt (154), and the belt tension can be set to the “off” state (see FIG. 4).
The tension arm (157) is biased by a spring so as to rotate upward, but since a stopper is added to the clutch / brake lever (18), the tension arm (157) rises in this situation. Never do.

The bracket (142) is provided with a swing member (190) pivotally supporting a swing pin (192), and the bracket (142) is provided with a lateral hole (142h). A wire (200) is stretched around the swing pin (192), and the wire (200) is connected to the lever (212) of the rod (210) (FIG. 4).
The wire (200) can be pulled by grasping the lever (212). The tip of the wire (200) is not fixed, and the engaging member (214) of the rod (210) can be hooked at a free place, and can be moved to the front end or the rear end of the traveling vehicle. In this way, the clutch can be operated from the front or rear of the aircraft.
By pulling the wire (200) in this way, the swing pin (192) pivotally supported by the swing member (190) moves along the horizontal hole (142h) in the right direction in the drawing, and the interlocking rod (140 ) Tilts to the right, and the fitting member (143) inserted through the elongated hole (140a) also rises to the upper right.
As a result, the tension arm (157) is also rotated upward, and the belt tension is set to “ON”. Further, since the tension arm (157) rotates upward, the brake member (147) pressing the driven pulley (155) is retracted from the pressing side to release the stop of the rotation of the driven pulley (155). Rotational force is transmitted.
The roller (202) is for tensioning the wire (200), and the spring (194) is laid on a swing member (190) that pivotally supports a swing pin (192). When the swing pin (192) pivotally supported by the swing member (190) moves in the right direction, a spring force for returning to the left direction is urged.

On the other hand, if the tension of the wire is loosened, the belt tension becomes “cut”.
That is, when the swinging pin (192) loosens the pulling force of the wire (200), the swinging member (190) pivotally supporting the swinging pin (192) by the spring (194) is moved to the left in the drawing. It moves to the left along the horizontal hole (142h) and returns to the original position. As a result, the interlocking rod (140) is released from the right inclination and returned to the original position, and the fitting member (143) inserted through the elongated hole (140a) is also lowered to return to the original position.
As a result, the tension arm (157) is also rotated downward, and the belt tension is set to “OFF”. Further, since the tension arm (157) rotates downward, the brake member (147) returns to the original state, presses the driven pulley (155), and stops the rotation of the driven pulley (155).

The diff lock operation wire 64 is connected to the diff lock pin 62 of the rotating portion 74, the other end of the diff lock operation wire 64 is connected to the front end portion of the diff lock interlocking wire 65, and the rear end portion of the differential lock interlocking wire 65 is connected to the differential lock operating wire 64. As shown in FIG. 6, it is connected to the other end of the interlocking lever 44 provided at the lower end 33 a of the operation shaft 33 of the differential lock mechanism 32.
From the use position (b) to the use position (b) (see FIG. 6), only the play portion of the differential lock operation wire 64 is pulled, but the use position (b) to the use position. From (c), the diff lock operation wire 64 pulls the diff lock interlocking wire 65 to operate the diff lock, and conversely, the diff lock operation wire is in the diff lock interlocking state from the use position (a) to the use position (b). The pull of the rod 65 is relaxed, and the diff lock release operation is performed.
When returning from the use position (c) to the use position (b), it is rewound by a spring-wound winding means (not shown) wound with a wire.
As a result, at the use position (c), the steering wheel 15 and the wheel can be locked, the direction of the wheel can be fixed, and the diff lock operation can be performed with the diff lock operation wire.

The above operation is an embodiment in which the rotation of the tension arm (157) and the pressing operation of the driven pulley (155) of the brake member (147) are linked to each other, but to the driven pulley (155) of the brake member (147). The airframe can be run or stopped only by the pressing operation.
That is, the pressing portion of the brake member (147) is composed of an elastic body (149) such as rubber urged toward the driven pulley (155) by the spring (148). Specifically, the brake member (147) is provided with a core rod (184) in the center, a cylindrical member (188) is provided on the rear end side, and a spring (148) is wound around the core rod (184) on the tip side from the cylindrical member (188). An elastic body (149) is provided at the tip.

As shown in FIG. 1, the planting unit 2 arranges a seedling stage 36 on a planting mission case 35 and places a seedling mat (not shown) on the seedling stage 36. The mat is cut into a seedling block by a planting claw 37 interlocked with the planting mission case 35, and the seedling block is planted in the field. Reference numeral 38 denotes a float.
An input shaft 39 is projected forward from the planting mission case 35, and the input shaft 39 and the PTO shaft 40 provided in the transmission case 7 are linked and connected via a transmission shaft 41.

  As shown in FIG. 1, the elevating mechanism 3 includes a top link 42, a pair of left and right lower links 43, 43, and an elevating cylinder (not shown) that moves the links 42, 43, 43 up and down. And the planting part 2 can be raised / lowered in the back position of the driving | running | working part 1 by extending-contracting the raising / lowering cylinder.

Next, an embodiment of the present invention will be described. Since the steering post 70 in FIG. 1 is provided with a gear portion 90 between the fixed portion 72 and the upper rotating portion 74, as shown in FIG. ), (C) can be rotated to the use position.
First, the use position of (a) is a position where the operator sits on the seat 16 and operates (b), and the operator can operate from a position away from the vehicle in front of the vehicle after getting off the traveling vehicle 1. It is.
For example, when letting the machine body escape from the field, the operator can get off the machine body and operate the steering wheel 15. Also, when unloading the rice transplanter to the truck, when the rice transplanter is unloaded from the truck, the steering post 70 is rotated to the (C) use position, and the back of the traveling vehicle is operated from the front of the vehicle. When the traveling vehicle is loaded, the operability is improved because the operation is possible from the front of the traveling vehicle.
Further, in the (C) use position, when the traveling vehicle is lifted, the steering wheel 15 is pushed down to prevent the traveling vehicle from being lifted.
The use position of (b) of the steering post 70 in FIG. 1 is not a fixed position, and the position of the steering post 70 can be freely changed. With such a configuration, a free driving operation is possible.
Since the steering post 70 can be changed to the (C) use position or the (B) use position, the steering wheel 15 is so-called tilted, and maintenance such as inspection of the engine can be easily performed.

As shown in FIG. 1, the fixing portion 72 and the gear portion 90 of the steering post 70 are provided in front of the engine E, and the engine E is provided between the seat 16 and the fixing portion 72 and the gear portion 90 of the steering post 70. The traveling vehicle 1 can be made compact without increasing the overall length of the traveling vehicle 1, and an ideal steering angle can be obtained during traveling and operation, so that operability and comfort can be improved.
2 is a perspective view of FIG. 1. The steering post 70 can be changed to the use positions (A), (B), and (C), and the panel 80 is also rotated together with the steering post 70. FIG. Therefore, when the operator performs each operation when getting on or off the vehicle, it is possible to always provide a shift lever 17, a clutch / brake lever 18, an accelerator, etc. as a panel and an operation unit in the vicinity of the steering wheel 15. Yes, operability can be improved. When it is impossible to work on a wetland or the like, the steering post 70 can be planted while getting off and operating the steering wheel at the (B) use position. It can be used to prevent lifting.

FIG. 7A is a detailed view of the steering post 70 portion of FIG. The steering post 70 is fixed to the body frame 4 by a lower fixing portion 72. Further, the upper rotating portion 74 can be used between the use positions (A) and (C) via the gear portion 90.
FIG. 7B shows an example in which the universal joint is used for the gear portion 90 at the use position (c), and the basic structure of the universal joint is as shown in FIG. A cross-shaped coupling pin 100 is fitted between 98 and the movable hub 99. A rotating portion 74 of the steering post 70 is coupled above the movable hub 99.
Since the movable limit of the universal joint is exceeded at the use position (c), the steering post 70 does not rotate further below the use position (c), and the steering wheel 15 above the steering post 70 also It is locked without rotating. Therefore, the wheel is also locked. For this reason, in the use position (c), the wheel is locked in the traveling direction of the traveling vehicle in the loading and unloading work from the truck and the work over the ridge, so that the deviation of the course due to the erroneous operation of the steering wheel 15 can be prevented.

FIG. 8 is a schematic diagram showing an embodiment of the gear unit 90. The gear unit 90 includes a lower box 92 and an upper box 94. The relationship between the lower box 92 and the upper box 94 is such that the lower box 92 fits into the upper box 94 and the upper box 94 is large enough to rotate about the central shaft pin 102. Yes.
Here, the shape of the lower box 92 is preferably (A) in FIG. 9, and the shape of the upper box 94 is preferably (B) in FIG. In the lower box 92, as shown in FIG. 9A, the side plate 92A and the side plate 92C are erected with the same dimensions, and the low side plate 92B and the side plate 92D are connected between the side plate 92A and the side plate 92C. . Reference numeral 92E denotes a bottom plate, which is joined to the end of each side plate at the bottom of the four side plates. A hole 92AH that pivotally supports the central shaft pin 102 is opened in the central portion of the side plate 92A, and a hole 92CH that pivotally supports the central shaft pin 102 is also opened in the central portion of the side plate 92C. A hole 92EH that pivotally supports the center shaft 104 of the fixed hub 98 is opened inside the bottom plate 92E.
In the upper box 94, as shown in FIG. 9B, the side plate 94A and the side plate 94C are erected with the same dimensions, and the side plate 94B and the side plate 94D are connected between the side plate 94A and the side plate 94C. 94E is a top plate, which is joined to the end of each side plate at the top of the four side plates. A hole 94AH for supporting the central shaft pin 102 is opened inside the side plate 94A, and a hole 94CH for supporting the central shaft pin 102 is also opened inside the side plate 94C. A hole 94EH that supports the central shaft 106 of the movable hub 99 is opened inside the top plate 94E.

FIG. 8 is a schematic view showing an embodiment of the gear unit 90 using the lower box 92 and the upper box 94 of FIGS. 9 (A) and 9 (B). The gear portion 90 is provided with a fixing hub 98 at the tip of the central shaft 104 that is pivotally supported in the fixing portion 72 of the steering post 70.
On the other hand, a movable hub 99 is provided at the tip of the central shaft 106 that is pivotally supported in the rotating portion 74 of the steering post 70.
The fixed hub 98 and the movable hub 99 are configured by a well-known universal joint 96 joined by a cross-shaped coupling pin 100.
The rotational force of the movable hub 99 can be transmitted to the lower fixed hub 98 via the cross-shaped connecting pin 100.
The lower box 92 and the upper box 94 are pivotally supported by a central shaft pin 102 fitted in the hole 92CH and the hole 94CH and the hole 92AH and the hole 94AH.
The lower box 92 is fixed, but the upper box 94 is rotated about the central axis 102 and can be rotated from the use position (A) to (C) of the steering wheel 15.
The upper ends of the side plates 92B and 92D of the lower box 92 serve as stoppers for the central shaft 106 pivotally supported in the rotating portion 74 of the steering post 70, and do not rotate downward any further. . The stopper may be one that restricts the rotation range by a general arm, for example.
Further, the side plates 94B and 94D of the upper box 94 may perform the same rotation restricting function.
The bearings 110 and 112 are members necessary for stably rotating the central shafts 104 and 106.

  FIGS. 10A and 10B show a lock device 120 for locking the rotation of the steering wheel 15 provided in the vicinity of the steering wheel 15 at the upper part of the rotation part 74 of the steering post 70. A fixing member 122 is provided on the outer periphery of the portion 74, a rotatable lock rod 124 is provided at the tip, and a lock pin 126 is provided at the tip. And the hole 130 is provided in the rotation part 74 of the steering post 70, and the hole 132 is further provided in the rotating shaft 74C built in the rotation part. The hole 132 of the rotating shaft 74C is aligned with the hole 130 of the rotating portion 74, the rotatable lock rod 124 is rotated, and the lock pin 126 is engaged with the hole 132, thereby steering. The rotation of the wheel 15 can be stopped and pulled to lock the wheel with respect to the traveling direction of the traveling vehicle.

FIG. 11 shows the relationship between the gear portion 90 and the fixed portion 72 and the rotating portion 74 of the steering post 70, and illustrates the rotatable portion and the non-rotatable portion of the universal joint 96 of the gear portion 90. It is.
FIG. 11 (A-b) shows a state in which the gear portion 90 is rotatable in the longitudinal direction of the traveling vehicle (the traveling direction is the left direction in the figure). The state of the steering wheel 15 at that time is FIG. 11 (Aa) (the traveling direction is upward as viewed in the figure). FIG. 11 (Ba) shows a state turned 90 degrees to the right from this state (the traveling direction is upward as viewed in the figure). In this state, the gear unit 90 is in the state shown in FIG. 11B-B (the traveling direction is the left direction in the figure). In this state, the universal joint is provided with the yoke of the fixed hub 98 close to the yoke of the movable hub 99 so as not to rotate in the rotation direction. By comprising in this way, the rotation to the front-back direction of the rotation part 74 can be blocked | prevented.
In addition, when it is further rotated 90 degrees from this state (180 degrees from FIG. 11 (Aa)), the state of the steering wheel 15 becomes the opposite state to the state of FIG. 11 (Aa), The state of the gear portion is the state shown in FIG. 11A-B, and the steering post 70 can be rotated back and forth.
Furthermore, when it is rotated 90 degrees (270 degrees from FIG. 11 (Aa)), the state of the steering wheel 15 is opposite to the state of FIG. 11 (Ba), and the state of the gear portion. 11 (B-b), the steering post 70 cannot be rotated back and forth.

Therefore, the steering post 70 can be rotated in the front-rear direction every 180 degrees, a range in which the steering can be rotated is set in advance, and the steering post 70 is rotated in the front-rear direction at that position. If the steering wheel 15 moves forward at a pivotable position, the steering wheel 15 is turned to the right or left in the traveling direction at a predetermined position, and the steering post 70 stops rotating at a position where the steering post 70 cannot pivot, the steering post 70 is It cannot be rotated. In this case, if the lock pin 126 of FIG. 10 is used, the rotation of the rotating shaft 74C of the rotating portion 74 can be prevented, and thus the wheel can be locked with respect to the steering wheel 15 and the traveling direction of the traveling vehicle.
Furthermore, if the steering wheel 15 is cut to one side in the traveling direction, the rotation of the steering wheel 15 becomes practically difficult.
In such a configuration, in a farm field in a mountainous area or a deformed farm field, the rice transplanter may go in and out at an angle or bend, and if the steering post 70 is fixed, driving with a degree of freedom can be performed. . In particular, when driving in a narrow place, the directionality may be very delicate, and it is necessary to change the directionality in detail, which is useful in such a case.

Further, the steering post 70 is rotated to the use position (c) in FIG. 1 at a position where the steering post 70 can be rotated in the front-rear direction. As a result, at the use position (c), the state shown in FIG. 7B is established, and the universal joint is in a locked state where it cannot rotate.
Accordingly, the steering wheel does not rotate, and the wheels are locked in the traveling direction of the traveling vehicle.
1, the steering post 70 can be rotated in the front-rear direction. For example, as shown in FIG. 13A, the knob 103a is placed outside the upper box 94 of the central shaft pin 102. The rotation of the steering post 70 can be locked by fixing the space between the upper box 94 and the lower box 92 by providing the regulating member 103b on the inner side and rotating the knob 103a. Further, as shown in FIG. 13B, a rotating shaft 113 with a spring may be provided in the upper box 94, and the rod 114 may be rotated in the direction of the arrow to be fitted to the fixture 115 provided in the lower box 92. In this case, the rod 114 is urged counterclockwise.
Thus, the upper box 94 and the lower box 92 can be fixed, and the rotation of the steering post 70 can be locked.

  If the steering post 70 locks the wheel at the position (c) in FIG. 1, the operator can stand up in front of the traveling vehicle and lift the vehicle or hold the lifted vehicle down. Necessary work such as crossing over and unloading on trucks is possible.

  FIG. 12 shows an embodiment in which an intermediate rotating body 73 is provided. (A) shows the embodiment in which the steering post 70 is rotated in the direction of the use position (A), and (B) shows the direction of the use position (C). In any case, the rotation range is large as compared with the case where the intermediate rotating body 73 is not provided.

  As described above, the riding rice transplanter according to the present invention includes the steering post having excellent storability and operability, and is therefore useful for rice planting work.

The side view of the riding rice transplanter which concerns on this invention. The perspective view of FIG. A plan view showing a portion of the steering mechanism 22 The side view of a main clutch lever and a main clutch pedal. The top view of the main clutch lever and main clutch pedal of FIG. Explanatory drawing of the mechanism of a diff lock. (A) is a detailed view of the rotation of the steering post 70 part, (B) is an explanatory view showing the state of the gear portion in the use state (c). The schematic diagram which showed the Example of the gear part 90. FIG. (A) is a perspective view showing the shape of the upper box 94 (B) of the lower box 92. (A) is the schematic of the locking device 120 which locks rotation of the steering wheel 15, (B) is a detailed view of (A). Explanatory drawing which showed the relationship between the gear part 90, the fixing | fixed part 72 of the steering post 70, and the rotation part 74. FIG. It is the schematic diagram which showed the relationship between the fixing | fixed part 72, the intermediate | middle rotation part 73, and the rotation part 74, (A) is a schematic diagram which shows the state of use position (A) and (B) in the use position (C). (A) is a schematic diagram showing a locking mechanism for turning the steering post 70 by the knob 103a, and (B) is a schematic diagram showing a locking mechanism for turning the steering post 70 by the rod 114.

Explanation of symbols

A Passenger rice transplanter E Engine 1 Traveling vehicle 2 Planting part 3 Lifting mechanism 4 Airframe frame 5 Motor part 6 Driving part 7 Mission case 8 Front wheel 9 Rear wheel 10 Front and rear extension frame formation piece 10a Front and rear extension frame formation piece rear part 12 Left and right extension Frame forming piece 13 Steering column 15 Steering wheel 16 Seat 17 Shift lever 18 Clutch / brake lever 19 Planting lift lever 20 Differential lock lever 21 Front axle case 22 Steering mechanism 23 Support frame body 24 Steering operation arm 25 Arm support shaft 26 Internal gear 27 Small gear 28 Knuckle arm 29 Tie rod 30 Front wheel drive shaft 31 Differential mechanism 32 Differential lock mechanism 33 Operation shaft 33a Lower end 35 Planting mission case 36 Seedling stand 37 Planting claw 38 Float 39 Input shaft 40 PTO shaft 41 Transmission shaft 42 Top link 43 Lower link 44 Interlocking lever 45 Interlocking wire 62 Lever 63 Rotating shaft 64 Differential lock operating rod 65 Differential lock interlocking rod 66 Buffer spring 67 Spring support piece 70 Steering post 72 Fixing portion 73 Intermediate rotation Part 74 Rotating part 74C Rotating shaft 80 Panel 90 Gear part 92 Lower box 94 Upper box 96 Universal joint 98 Fixed hub 99 Movable hub 100 Coupling pin 102 Center shaft pin 104, 106 Center shaft 110, 112 Bearing 113 Spring-equipped rotating shaft 114 Rod 115 Fixing tool 120 Locking device 122 Fixing member 124 Lock rod 126 Lock pin 130, 132 Hole 140 Interlocking rod 140a Long hole 141 Rotating support shaft 142 Bracket G 142h Lateral hole 143 Insertion member 144 L-shaped bracket 145 Press member 146 Cam 147 Brake member 148 Spring 149 Elastic body 152 Output shaft 153 Drive pulley 154 Belt 155 Driven pulley 156 Input shaft 157 Tension arm 158 Tension roller 159 Tension roller 159 Clutch pedal 174a Pedal support 184 Core rod 188 Cylindrical member 190 Oscillating member 192 Oscillating pin 194 Spring 200 Wire 202 Roller

Claims (4)

  This is a passenger rice transplanter in which a planting part is connected to the rear of the traveling part so that it can be moved up and down, a steering post having a rotating upper part is provided on the machine frame at the front end of the traveling part, and a steering wheel is provided on the upper part of the steering post. A riding rice transplanter characterized in that it has excellent operability consisting of an operation position during riding operation of the steering wheel, a forward operation position rotated from the steering wheel, and a position at which the steering wheel gets off and operates the steering wheel.   The riding rice transplanter according to claim 1, wherein the steering wheel and the traveling wheel are locked at the forward operation position.   3. The upper portion of the steering post is rotated by providing a universal joint, and the upper portion of the steering post is rotated, and the steering wheel is locked at an angle greater than the angle at which the universal joint cannot rotate. Riding rice transplanter   The riding rice transplanter according to claim 3, wherein the rotation of the upper portion of the steering post is restricted by the rotation angle of the steering wheel.

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