WO2007102301A1

WO2007102301A1 - Device for changing number of seedling-planting rows in riding-type rice planting machine

Info

Publication number: WO2007102301A1
Application number: PCT/JP2007/052945
Authority: WO
Inventors: Kensuke Oomae
Original assignee: Yanmar Co., Ltd.
Priority date: 2006-03-08
Filing date: 2007-02-19
Publication date: 2007-09-13
Also published as: KR101513513B1; KR101371000B1; KR101513515B1; KR101513516B1; KR101513514B1; KR20080100339A; KR20140106747A; KR20120134160A; KR20120135445A; KR20140101012A; KR20140106748A; KR20140101013A

Abstract

In a riding-type rice planting machine, seedling-planting mechanisms (17) for planting seedlings in a farm field are arranged side-by-side in the lateral direction of the machine. A clutch mechanism (20) for stopping planting of seedlings in a particular row and engaging and disengaging the drive of the seedling-planting mechanism is provided for each seedling-planting mechanism or for each pair of seedling-planting mechanisms. Clutch levers (21, 22, 23) for the clutch mechanisms (20) are installed near an operation seat (8) where the worker sits, and the clutch levers (21, 22, 23) are installed such that the seedling-planting mechanisms are driven when the clutch levers are rotated forward and are stopped when they are rotated backward. The levers are arranged so that their operating positions can be easily and accurately identified at a glance to improve operability and reduce erroneous operations. The clutch levers are constructed so that they are tilted rearward to a horizontal position or to near a horizontal position when they are rotated rearward.

Description

Specification

A variable device for the number of seedlings planted in a riding type rice transplanter

Technical field

[0001] The present invention relates to a variable device for arbitrarily changing the number of planting bars for a rower in a rowing type of a riding type rice transplanter, at a position of a control seat on which a worker boards.

Background art

[0002] Generally, in the passenger type rice transplanter, a plurality of seedling planting mechanisms for planting seedlings in the field are arranged side by side at appropriate intervals in the lateral direction, and each seedling planting is carried out. By driving the feeding mechanism with power transmission from a power source such as an engine, the planting of seedlings in a weir scene is carried out in a plurality of rows. A variable number of seedling planting bars is provided to change the number of plantings, 6 plantings or 8 planting specifications to a smaller number of planting bars.

[0003] Conventionally, a variable device for this kind of seedling planting strip number is, for example, described in Patent Document 1 etc., and a striated clutch mechanism for interrupting power transmission to each seedling planting mechanism is used. , Provided for each seedling planting mechanism or for each pair of seedling planting mechanisms, while rotating the clutch lever for each of the row retaining clutch mechanisms in the front-rear direction in the vicinity of the steering seat on which the operator rides By changing the number of seedling plants by stopping the optional seedling planting mechanism or the optional pair of seedling planting mechanisms among the seedling planting mechanisms by turning the clutch lever to the rear. It is configured to

Patent Document 1: Japanese Unexamined Patent Application Publication No. 2003-219715

Disclosure of the invention

Problem that invention tries to solve

However, as described in the patent document 1 and the like, the conventional variable device, when the respective clutch levers for changing the number of plantings and the number of stripes are rotated in the forward direction, causes The planting mechanism is driven and configured to stop the planting mechanism when it is rotated backward, However, each of the clutch levers is shaped so as to linearly extend in the radial direction from the center of rotation, so that any clutch lever among the clutch levers is in a position to drive the seedling planting mechanism, or The force at the position where the seedling planting mechanism is stopped can not be identified instantly at first glance, and not only the operability is low, but there is also the problem that it is difficult to operate incorrectly.

[0005] In the case where each of the clutch levers is operated to a position where the seedling planting mechanism is stopped by turning to the rear, the respective clutch levers are in an upright configuration and are installed near the control seat. Since the upper surface force of the work floor surface being projected largely protrudes upward, there is also a problem that there is a large possibility that the work may be hindered when the worker performs various operations such as seedling on the work floor surface.

[0006] The present invention has as its technical object to provide a variable apparatus of the number of seedlings for planting which solves these problems.

Means to solve the problem

[0007] In order to achieve this technical task, the invention according to claim 1 is characterized in that a plurality of seedling planting mechanisms for planting seedlings in the field are arranged side by side, A row clutch mechanism is provided for each seedling planting mechanism or a pair of seedling planting mechanisms, and the drive is intermittently operated, while each of the row clutch mechanisms is provided in the vicinity of the control seat on which the operator gets on. The clutch lever for driving the seedling planting mechanism is driven when the clutch lever is rotated forward, and the seedling planting mechanism is stopped when the clutch lever is rotated backward. When the clutch lever is turned rearward, it is characterized in that it is structured such that it can be substantially horizontally or nearly turned down toward the rear when the clutch lever is turned to the rear.

The invention described in claim 2 is the riding type rice transplanter according to claim 1, wherein, when each of the clutch levers is turned to the rear, the grip portion is the one of the control seat. It is provided in the vicinity and is configured to be substantially parallel to or near to the work floor surface! /.

[0009] Furthermore, in the riding type rice transplanter according to claim 1 or 2, the invention according to claim 3 is characterized in that, in the description of claim 1 or 2, in each of the row locking clutch mechanisms, this The clutch means is provided with spring means for holding power transmission in, while each clutch lever is held by the spring means in the attitude when it is turned forward, and the attitude when it is turned backward is different. Configured to be held above the fulcrum in said spring means, characterized in that /.

[0010] The device for changing the number of seedling planting bars in the riding type rice planter of the invention according to claim 4 is configured by arranging a plurality of seedling planting mechanisms for planting seedlings on the field side by side. While each rowing mechanism for each seedling planting mechanism or for each pair of seedling planting mechanisms is provided with a row locking clutch mechanism for interrupting its drive, each row locking clutch mechanism is provided in the vicinity of the control seat on which the operator gets on. In the riding type rice transplanter provided with a clutch lever for each of the above, each of the clutch levers is disposed on both the left and right sides of the control seat, and is disposed.

[0011] The invention set forth in claim 5 is the variable device for the number of seedlings planted in the riding type rice transplanter according to claim 4, wherein among the seedling planting mechanisms, the seedling planting mechanism located on the right side in the traveling direction. Of the seedling planting mechanisms, the clutch lever for the snap-in clutch mechanism is located on the right side of the control seat, and the clutch lever for the snap-in mechanism of the seedling planting mechanism is located on the left side of the control direction. It is being done.

[0012] The invention set forth in claim 6 is the seedling planting mechanism positioned on the outer side among the respective seedling planting mechanisms in the apparatus for changing the number of planting streaks in the riding type rice transplanter according to claim 4 or 5. The clutch lever for the steering seat is configured to be located at a site far from the operation seat, and the clutch lever for the seedling planting mechanism located inside the outer seedling planting mechanism is located near the control seat. It is characterized by teaching.

Effect of the invention

As described in claim 1, when the clutch levers for changing the number of seedlings are changed to the rear direction when the clutch levers are turned to the rear side, they are substantially horizontal or nearly horizontal. Since the clutch lever is configured to fall down to the state, when the clutch lever is operated to rotate backward so as to stop the seedling planting mechanism, the clutch lever may fall to the state of being horizontal or close to the rear. Therefore, according to this, whether any of the clutch levers is in the position to drive the seedling planting mechanism Alternatively, whether or not the seedling planting mechanism is at a stop position can be easily and accurately identified at first glance, operability can be greatly improved, and erroneous operations can be reliably reduced.

In this case, by configuring each of the clutch levers as described in claim 2, in a state where each of the clutch levers is in a position where the seedling planting mechanism is stopped, the work floor surface Since the projection size of the force can be significantly reduced, it is ensured that each clutch lever interferes with various operations such as seedling on the work floor surface, as compared with the prior art. It can be reduced.

[0015] Further, according to the configuration described in claim 3, holding the clutch levers in a position for driving the seedling planting mechanism and in a position for stopping the seedling planting mechanism is the one spring. Since this can be achieved by means, the structure for holding the clutch levers in the two positions can be extremely simply configured.

[0016] As described in the fourth aspect, by allocating the clutch levers for changing the number of seedlings for planting plants to both the left and right sides of the control seat, all of the clutch levers can be The operator operates the all clutch levers while sitting on the control seat, because the control levers are closer to the control seat than in the case where the respective clutch levers are provided side by side on one side of the control seat. In addition to being able to greatly improve operability, it is possible to reduce the number of erroneous operations and to achieve a dignity effect.

In this case, by adopting the configuration described in claim 5, the seedling planting mechanism located on the right side by the clutch lever located on the right side of the control seat is placed on the left side by the clutch lever located on the left side. Since each planting mechanism can be operated, it is possible to reliably avoid operating the left and right incorrectly.

In addition, by adopting the configuration described in claim 6, it is possible to reliably avoid erroneous operation between the clutch levers located on the left and right sides of the control seat.

Brief description of the drawings

FIG. 1 is a side view of a riding type rice transplanter.

[Fig. 2] A plan view of a riding type rice transplanter.

[FIG. 3] It is an enlarged view which shows the principal part of FIG. [FIG. 4] It is an enlarged view which shows the further principal part of FIG.

[FIG. 5] It is a V-V side view of FIG.

FIG. 6 is a perspective view of FIG.

7] It is a figure which shows the part of a seedling planting mechanism.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

Explanation of sign

1 Rice transplanter

2 Running aircraft

3, 4 wheels

5 Farm field

6 Seedling planter

8 control seats

10 cover case

11 Work floor

13, 14, 15 Seedling unit

17 Seedling planting mechanism

18 Seedling platform

19 float

20 row retaining clutch mechanism

20k torsion spring (spring means)

21, 22, 23 Clutch Reno

30, 31, 32 Operation wire

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the embodiment of the present invention will be described with reference to the drawings in the case where it is applied to a six-row planting type rice transplanter.

In FIGS. 1 and 2, reference numeral 1 denotes a six-row planting type rice transplanter, which is a traveling airframe 2 supported by a pair of left and right front wheels 3 and rear wheels 4; Seedlings attached to the rear of the traveling body 2 so as to be able to ascend and descend and to plant seedlings for six rows in the case 5 The planting device 6 is provided.

In addition, an engine 7 is mounted on the front of the traveling body 2 and a control seat 8 is provided on the rear, and the power from the engine 7 is appropriately shifted to each wheel 3. , 4 and is configured to forward at an appropriate speed in the direction indicated by the arrow A, and is configured to move forward at a suitable speed in the direction indicated by the arrow A. A cover case 10 is provided on both sides, and the upper surface of the cover case 10 is a seedling mat mounted on the front left and right sides of the traveling airframe 2 under this condition. It is formed on the work floor surface 11 for performing various operations such as seedling to replenish the planting device 6.

[0024] As shown by the two-dot chain line, fertilizer dispersion for spraying the fertilizer on each of the planting strips to be planted by the seedling planting apparatus 6 on the work floor 11 is carried out. There are cases where mechanism 12 is installed.

The seedling planting apparatus 6 is, as is well known in the prior art, three seedling planting units each having two rows of planting as one unit, that is, a first seedling planting unit 13 and a second seedling planting unit 14 And by arranging the third seedling plant 15 side by side, a total of six rows are planted.

Further, each of the seedling plant units 13, 14, 15 has a transmission case 16 to which power is transmitted from the engine 7 and a conventional well-known port mounted on the left and right side surfaces of the transmission case 16. Tally type seedling planting mechanism 17, seedling loading stand 18 mounted on the upper surface of the transmission case 16, and a float 19 mounted on the lower surface of the transmission case 16 so as to slide the surface of the fence scene 5 The seedling loading table 18 is provided with a vertical feeding mechanism for seedling mats placed on the seedling loading table 18 (not shown), while the transmission case 16 has a pair of left and right sides. A linear locking mechanism 20 is provided to simultaneously and intermittently operate the power transmission to the seedling planting mechanism 17.

[0027] As shown in Figs. 7 and 8, the barbed clutch mechanism 20 rotates the driven gear 20b, which is motive power transmitted from the engine 7, to the drive shaft 20a common to the pair of seedling planting mechanisms 17. The clutch body 20d, which is structured so as to be freely fitted and provided with the driven side clutch claw 20c on the driven gear 20b, and is configured to engage with the driven side clutch claw 20c on the drive shaft 20a, is spline fitted. And the clutch body 20d is The two seedling planting mechanisms 17 are rotationally driven by being always engaged with the driven clutch claw 20c by the bias of a spring 20e fitted and provided on the drive shaft 20a, and further, the clutch body 20d, An inclined cam surface 20f is provided, and the tip of an operating pin 20g provided in the transmission case 16 so as to be freely retractable from the inclined cam surface 20f is brought into contact with the clutch body 20d so as to be piled on the spring 20e. The two seedling planting mechanisms 17 are configured to stop the rotational drive by moving backward so as to disengage from the side clutch claw 20c.

In this case, one end of the bell crank type operation lever 20j rotatably pivots the proximal end of the operation pin 20g to the tip of the arm 20h projecting upward from the transmission case 16 with the pin 20i. And the control pin 20g is biased in a direction away from the inclined cam surface 20f by a torsion spring 20k provided so as to fit on the pin 20i with respect to the bell crank lever 20j. Configure to hold this position.

On the other hand, in the cover case 10 of the traveling machine body 2, clutch levers 21, 22, 23 for the pair of seedling planting mechanisms 17 in each of the respective seedling planting units 13, 14, 15 It is distributed to both left and right sides.

That is, a pair of seedling planting mechanisms in the first seedling planting unit 13 positioned on the rightmost outside with respect to the traveling direction among the seedling planting units 13, 14, 15 on the right side of the operation seat 8. And the clutch lever 22 for the pair of seedling planting mechanisms 17 in the second seedling unit 14 positioned inward with respect to the traveling direction among the respective seedling plant units 13, 14 and 15 in the lateral direction. Arrange in line.

On the other hand, the pair of seedling planting mechanisms 17 in the third seedling planting unit 15 located on the left outside of the seedling planting units 13, 14, 15 on the left side of the operation seat 8 Install the clutch lever 23.

In this case, the clutch lever 21 for the pair of seedling planting mechanisms 17 in the first seedling planting unit 13 is located outside, and the clutch lever 22 for the pair of seedling planting mechanisms 17 in the second seedling planting unit 14 is Located in

[0033] In addition to arranging the three types of seedling planting units 13, 14 and 15 side by side, the fourth seedling planting unit having the same configuration as the respective seedling planting units is provided. If you want to configure a total of eight rows planted by arranging side by side, drive on the right side of the control seat 8 Control levers for the pair of seedling planting mechanisms 17 in the first seedling unit and the second seedling unit, counting the right force with respect to the direction, and the clutch levers for the pair of seedling planting mechanisms 17 in the first seedling unit The clutch levers for the pair of seedling planting mechanisms 17 in the second seedling plant unit are located at a position closer to the control seat 8 at a more distant site, while on the left side of the control seat 8 in the traveling direction. Count the clutch levers for the pair of seedling planting mechanisms 17 in the third seedling unit and the fourth seedling unit by counting the right carps and the clutch levers for the pair of seedling planting mechanisms 17 in the fourth seedling unit The clutch lever for the pair of seedling planting mechanisms 17 in the third seedling unit is located in the part near the control seat 8.

In other words, the clutch levers for the pair of seedling planting mechanisms in the seedling planting units positioned on the right side with respect to the traveling direction of the respective seedling planting units are located on the right side of the control seat. The clutch levers for the pair of seedling planting mechanisms in the seedling planting units located on the left side with respect to the traveling direction among the respective seedling planting units are located on the left and right sides of the control seat 8, so that The clutch levers for the pair of seedling planting mechanisms in the seedling planting units, which are separately disposed among the seedling planting units, are arranged separately, and the clutch levers for the pair of seedling planting mechanisms are further away from the control seat. A clutch lever for a pair of seedling planting mechanisms in a seedling planting unit located inside the planting unit is located at a position near the control seat Configure as.

A clutch lever 22 for the pair of seedling planting mechanisms 17 in the first seedling planting unit 13 and a clutch lever 22 for the pair of seedling planting mechanisms 17 in the second seedling planting unit 14 are provided in the cover case 10 The third and fourth clutch levers 21 and 22 are pivotally attached to the left and right side surfaces of the bracket 25 projecting from the portal frame 24 by the pins 26 and 27 so that the two clutch levers 21 and 22 pivot in the front and rear direction. The clutch lever 23 for the seedling plant unit 15 is pivotally pivotally connected to the right side surface of the bracket 28 protruding from the portal frame 24 by a pin 29 so that the clutch lever 23 is pivoted in the front-rear direction.

In the case of the eight-row planting, the clutch lever for the fourth seedling unit is pivotally attached to the left side surface of the bracket 28. In other words, attach two clutch levers to the left and right sides of the one bracket 25, 28. Configured.

Between the pin 21a fixed to the lower end portion of the clutch lever 21 for the first seedling plant unit 13 and the lower end of the control lever 20j of the row locking clutch mechanism 20 in the first seedling plant unit 13, the second seedling planting A clutch lever for the third seedling unit 15, between a pin 22a fixed to the lower end of the clutch lever 22 for the unit 14 and the lower end of the control lever 20j of the row locking clutch mechanism 20 in the second seedling unit 14 Connect each of the pin 23a fixed to the lower end of the 23 and the lower end of the control lever 20j of the row clutch mechanism 20 in the third seedling unit 15 through the remote control wires 30, 31, 32. Therefore, when the clutch levers 21, 22 and 23 are rotated until they abut against the front stopper (not shown) in the forward direction, the retaining clutch mechanism 20 in each of the seedling plant units 13, 14 and 15 When the clutch levers 21, 22, 23 are turned until the clutch levers 21, 22, 23 are brought into contact with the backrest (not shown) in the rear direction, the streaks in the seedling plant units 13, 14, 15 are stopped. The clutch mechanism 20 is configured to be engaged.

That is, by turning any clutch lever among the clutch levers 21, 22 and 23 to the rear side, both the seedling planting mechanisms 17 in the seedling unit corresponding to the clutch levers are simultaneously stopped. Because of this, six-row planting power can be freely changed to four-row planting or two-row planting.

In this case, when the respective clutch levers 21, 22, 23 are turned forward, the spring due to the torsion spring 20k of the row locking clutch mechanism 20 in the respective seedling plant units 13, 14, 15 The force acts on the lower side of the pins 26, 27, 29 to contact the front stopper, that is, the front rotation position (position for driving the seedling planting mechanism). When the levers 21, 22 and 23 are turned to the rear, the spring force by the torsion spring 20k exceeds the pins 26, 27 and 29 so that the fulcrum is over the fulcrum so that the rear stopper can be obtained. It is configured to be held in the contact state, that is, in the backward rotation position (the position where the seedling planting mechanism is stopped).

A buffer tension spring 33 is provided at the connection between the wires 30, 31, 32 and the operation lever 20j of the locking clutch mechanism 20.

Then, each of the clutch levers 21, 22, 23 is bent in a V-shape in a side view When it is turned to the forward rotation position (the position to drive the seedling planting mechanism) by making it into a shape, the grip on the upper end protrudes to the front of the cover case 10, When the handle is turned to the movable position (the position for stopping the seedling planting mechanism), the grip portion is slightly projected from the work floor 11 on the upper surface of the cover case 10 and the work floor 11 substantially In order to be parallel to or close to this, it is configured to fall backward substantially horizontally or close to it.

With this configuration, the clutch levers 21, 22, 23 are separately disposed on the left and right sides of the control seat 8, so that the clutch levers 21, 22, 23 The operator is closer to the control seat 8 than in the case where the respective clutch levers are provided side by side on one side of the control seat. Can operate the clutch lever.

When each of the clutch levers 21, 22, 23 is turned to the forward rotation position (position for driving the seedling planting mechanism), the grip portion at the upper end is the front surface of the cover case 10. When the handle is turned to the backward rotation position (the position to stop the seedling planting mechanism), the grip portion is forced to move backward substantially horizontally or to the rear. Since any of the clutch levers 21, 22 and 23 will be in the position to drive the seedling planting mechanism, or the seedling planting mechanism will be stopped. At first glance, it can be easily and accurately identified if it is in the desired position.

In a state where each of the clutch levers 21, 22, 23 is turned to the rear rotation position (position for stopping the seedling planting mechanism), the grip portion is a work floor on the upper surface of the cover case 10 The clutch levers 21, 22, and 23 force of each of the clutch levers 21, 22, and 23 are substantially parallel or close to the work floor 11 in a state where the work floor surface 11 slightly protrudes, such as seedlings on the work floor 10. It is possible to reliably reduce interference with various operations.

Further, the clutch lever 21 for the pair of seedling planting mechanisms 17 in the first seedling planting unit 13 which is positioned on the right side in the traveling direction among the respective seedling planting units 13, 14 and 15 is the steering seat 8 Of the third seedling planting units 15 located on the right side in the traveling direction among the seedling planting units 13, 14 and 15 while being located on the right side of the plant 1 As the clutch lever 23 for 7 is located on the left side of the control seat 8, the pair of seedling planting mechanisms 17 in the first seedling planting unit 13 located on the right side and the third seedling planting located on the left side Misoperation of the pair of seedling planting mechanisms 17 in the unit 15 can be reduced.

Furthermore, in each of the clutch levers 21 and 22 located on the right side of the control seat 8, a pair of seedling planting mechanisms in the first seedling plant unit 13 located on the outermost right side among the respective seedling plant units 17 The clutch lever 21 is located outside, and the clutch lever 22 for the pair of seedling planting mechanisms 17 in the second seedling unit 14 located inside the first seedling unit 13 is located inside As a result, it is possible to reduce erroneous operation of the outside and the inside between the respective clutch levers 21 and 22.

By the way, the seedling loading stand 18 in each of the seedling planting units 13, 14 and 15 is provided with a vertical feed mechanism for the seedling mat placed thereon, and this vertical feed mechanism is the double seedling planting machine The clutch mechanism is configured to stop the vertical feed at the same time when the drive of the mechanism 17 is stopped.

Therefore, the respective seedling plant units corresponding to the respective clutch levers 21, 22 and 23 on the pins 21a, 22a and 23a fixed to the lower ends of the respective clutch levers 21, 22 and 23 respectively. By connecting operation wires 34, 35, 36 for remotely operating the crack mechanism for the longitudinal feed mechanism in 13, 14, 15, the clutch lever in any of the clutch levers 21, 22, 23 can be Both the seedling planting mechanisms 17 in the seedling planting units 13, 14 and 15 corresponding to the relevant clutch lever in the backward rotation operation, and the vertical feed mechanism in the seedling platform 18 of the stopped seedling planting mechanism 17. It can be done simultaneously with the stop.

[0049] Further, depending on the type of rice transplanter for riding, as described above, the fertilizer spraying device 12 may be provided to the seedling planting strip by the seedling planting mechanism 17.

[0050] As is well known in the prior art, this fertilizer spreader 12 is configured to stop the spread of fertilizer to the seedling planting line by the stopped seedling planting mechanism among the respective seedling planting mechanisms 17. Is configured.

[0051] Therefore, in the fertilizer spreader 12, the operation wires 37, 38, 39 for operating the mechanism for stopping the spread of the fertilizer to each seedling planting strip, each clutch lever 21 , 22 and 23 by connecting to each of the pins 21a, 22a and 23a, the rearward operation of any clutch lever among the clutch levers 21, 22 and 23; The stop of both seedling planting mechanisms 17 in the seedling planting units 13, 14 and 15 corresponding to the clutch lever, the stop of the vertical feed mechanism in the seedling loading stand 18 of the stopped seedling planting mechanism 17, and the stopped seedlings The planting mechanism 17 can stop the application of fertilizer to the planting strip at the same time.

In the illustrated embodiment described above, one seedling planting unit is provided with a pair of seedling planting mechanisms, and the pair of seedling planting mechanisms is provided with a row retaining clutch mechanism. The invention is not limited to this, and it can be applied to the case where a row locking clutch mechanism is provided for each seedling planting mechanism.

Claims

The scope of the claims

[1] A plurality of seedling planting mechanisms for planting seedlings in the field are arranged side by side, and the operation is interrupted for each of the seedling planting mechanisms or a pair of seedling planting mechanisms. The clutch levers for each of the row locking clutch mechanisms are driven near the control seat where the operator gets on, and the seedling planting mechanism is driven when the clutch levers are turned forward. In the riding type rice planter provided to stop the seedling planting mechanism when it is rotated,

Each of the clutch levers is configured to fall substantially horizontally or in a rearward direction toward the rear when the clutch lever is operated to rotate rearward, in the riding type rice transplanter characterized in that A variable device for the number of seedlings planted.

[2] Each of the clutch levers is configured so as to be substantially parallel to or near the work floor provided near the control seat when the lever is turned rearward. The variable apparatus of the number of seedlings planting rows in the riding type rice transplanter according to claim 1 characterized by the above-mentioned.

[3] Each of the row locking clutch mechanisms is provided with a spring means for holding it in power transmission, while each of the clutch levers is held by the spring means in the posture when it is rotated forward. 3. The riding type rice transplanter according to claim 1 or 2, characterized in that the posture thereof when it is rotated backward is held above the fulcrum of the spring means. A variable device for the number of seedlings planted.

[4] A plurality of seedling planting mechanisms for planting seedlings in the field are arranged side by side, and the driving is interrupted for each of these seedling planting mechanisms or for each pair of seedling planting mechanisms. In the riding type rice transplanter, a clutch lever is provided for each of the row locking clutch mechanisms, in the vicinity of a control seat on which a worker is boarded, while providing a row locking clutch mechanism to operate.

The device for changing the number of planting bars in a riding type rice transplanter according to the present invention, wherein each of the clutch levers is distributed on both the left and right sides of the steering seat.

[5] Of the seedling planting mechanisms, the clutch lever for the row retaining clutch mechanism of the seedling planting mechanism located on the right side in the traveling direction is the right side of the control seat and the clutch lever for the seedling planting mechanism travels. Lever for the retaining clutch mechanism of the seedling mechanism located on the left side of the

The apparatus for variable number of planting bars in a riding type rice transplanter according to claim 4, which is disposed on the left side of a control seat.

Among the seedling planting mechanisms, the clutch lever for the seedling planting mechanism located outside is located inside the outer seedling planting mechanism at a location far from the steering seat force, and the clutch lever for the seedling planting mechanism is the steering seat The apparatus for changing the number of planting bars in the riding type rice transplanter according to claim 4 or 5, wherein the apparatus is configured to be located at a site in the vicinity.