WO2002094640A1

WO2002094640A1 - Rice transplanter

Info

Publication number: WO2002094640A1
Application number: PCT/JP2001/007873
Authority: WO
Inventors: Inoue Makoto; Maekawa Tomofumi
Original assignee: Yanmar Agricultural Equipment Co., Ltd.
Priority date: 2001-05-22
Filing date: 2001-09-10
Publication date: 2002-11-28
Also published as: KR100824658B1; KR20060123787A; TWI228970B; KR100824659B1; CN1943300A; CN100486415C; KR100838216B1; KR20040012772A; CN100406328C; JP2002335726A; KR20060126628A; CN1507398A

Abstract

A rice transplanter, wherein a body main frame (16) forming a frame is divided into three parts, i.e., a front frame (17), a center frame (18), and a rear frame (19), whereby the handling and assemblage of the transplanter can be improved more than the transplanter having the body main frame (16) of long integral structure.

Description

Rice transplanter

Technical field

TECHNICAL FIELD The present invention relates to a rice transplanting machine that performs a rice transplanting operation by mounting a planting section provided with a seedling mounting table and a planting pawl on a traveling vehicle.

Background art

Japanese Patent Application Laid-Open No. 61-28585 / 75 and others have a structure in which an engine stand is connected to the front of the mission case and a body frame is connected to the rear, but the maintenance of the mission case is limited. In such a case, it is necessary to disconnect the engine stand and main frame each time.

When the front and rear wheels, the engine, and the driver's seat are mounted on the main frame, the engine is mounted on the upper side of the main frame. In addition to the problem that cooling is not performed efficiently, there is a problem that the vertical mounting dimensions of the engine and the main frame cannot be easily reduced, and the overall height of the engine mounting portion cannot be easily reduced. In addition, the left and right mounting widths of the left and right anti-vibration members that support the engine are limited, so that the engine vibration transmitted to the left and right main frames in the torsion direction of this machine (around the longitudinal centerline of the aircraft) can be easily achieved. There is a problem that it is not possible to reduce the weight of the main frame by reducing the thickness of the main frame (reducing the cross-sectional area where the strength of the main frame is reduced).

In addition, since a dedicated member for supporting the spare seedling stand is specially provided on the main frame, it is not easy to simplify the components, and it is possible to reduce the weight and cost. In addition, it is not easy to achieve, and when transporting on a truck bed, it is necessary to remove the upper nursery support that is divided into upper and lower parts, and there is a problem that connection rattling occurs at the seam of the nursery support. Since the nursery stand support is fixed to the main frame, there are structural and handling problems such as the need to secure a large storage space for barns. Disclosure of the invention

According to the present invention, the vehicle body main frame 16 is divided into a front frame 17, a middle frame 18, and a rear frame 19. This makes it easier to handle and assemble than a long integrated structure.

In addition, since the front axle case 38 is connected to the middle frame 18, the engine case 36 and the like remain connected to the front frame 17, while the mission case 37 and CFC 1, axle case 3 This makes it possible to easily mount and remove the unit 8 and the unit 8 easily, thereby improving the maintainability of the mission case 37 and the front axle case 38. Further, since the cross-sectional area of the front frame 17 is made larger than that of the rear frame 19 and the engine 36 is supported by the front frame 17, the heavy engine 36 is mounted on the front frame 17. It is possible to improve the stability of the fuselage by providing good strength and good balance between the planting section 3 mounted on the rear side of the fuselage and the planting section 3.

In the rice transplanter, in which the front and rear wheels 5, 6 and the engine 36 and the driver's seat 7 are mounted on the left and right main frames 16, the installation width of the left and right main frames 16 is made larger than the left and right width of the engine 36. The main frame 16 wraps the lower part of the engine 36 when viewed from the side.Ventilation space is secured between the left and right main frames 16 and both sides of the engine 36 to smoothly exhaust hot air around the engine 36. The cooling efficiency of the engine 36 can be easily improved, and the engine weight can be easily reduced by installing a low engine. Further, both sides of a frame member 35 to which a vibration isolating member 53 for supporting the engine 36 can be attached are fixed to the left and right main frames 16. The strength of the main frame 16 is enhanced by reinforcing the frame member 35. The engine 36 can be made lighter by reducing the vibration and the high rigidity frame structure can support the engine 36 with anti-vibration, and the interval between the left and right anti-vibration members 53 is expanded to transmit the engine 36 in the torsion direction of the machine Therefore, it is possible to easily reduce the airframe structure, and to easily improve the vibration isolating function of the engine 36 and the like.

In addition, since the mission case 37 is fixed to the frame member 35, the strength of the frame member 35 can be easily secured against the vertical vibration of the engine 36, and the left and right performed using the frame member 35 can be secured. The strength for connecting the main frame 16 and supporting the engine 36 can be easily improved, and the rigidity of the frame member 35 in the torsion direction of the machine can be improved to simplify the engine 36 support structure and reduce the weight. Can be easily performed.

In addition, the frame member 35 and the mission case 37 are fixed substantially at the center of the mounting width of the left and right anti-vibration members 53, and the torsional deformation force in either the left or right direction generated by vibration of the engine 36 or the like is fixed. Even so, the strength of the frame member 35 can be easily secured by fixing it to the mission case 37, and deformation and damage of the frame member 35 can be prevented to easily improve durability. Also, a step 9 is provided on the main frame 16 via the step stay 24.25, and a spare seedling stand 15 for placing the supplementary seedlings for replenishment on the rice transplanter covering the upper side of the main frame 16 with the step 9 is provided. A mounting portion for the seedling support 94 is provided on the step 24, 25, and the seed support 94 is mounted on the step 24, 25, which is a highly rigid member. · Since the nursery stand 94 is also erected using the same as 25, it is possible to reduce the number of parts to attach the nursery stand 94 and By reducing the number of assembly steps, the weight and manufacturing cost can be easily reduced, and the rigidity of step 9 can support the load of the spare seedling stand 15 and make it more advantageous in terms of strength. It is easy to simplify the structure of the body to be attached. BRIEF DESCRIPTION OF THE FIGURES

Fig. 1 is an overall side view, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a side view of a traveling vehicle, Fig. 4 is a plan view of the main frame, Fig. 5 is a plan view of Fig. 4. FIG. 6 is a side view of the transmission case, FIG. 7 is a side view of the engine transmission, FIG. 8 is a plan view of FIG. 7, FIG. 9 is a perspective view of a vehicle body equipped with the engine, Fig. 10 is an enlarged view of Fig. 9, Fig. 11 is a perspective view of a vehicle body equipped with a mission case, Fig. 12 is an enlarged view of Fig. 11, and Fig. 13 is a drive transmission section. Perspective view, Fig. 14 is a perspective view of the front of the main frame, Fig. 15 is an enlarged view of Fig. 14, Fig. 16 is a top perspective view of the engine section, and Fig. 17 is the engine section. Fig. 18 is a front view of the engine, Fig. 19 is a plan view of the engine, Fig. 20 is a front view of the front axle case, Fig. 21 is the left front axle one Figure 22 is a cross-sectional view of the left front axle case, Figure 23 is an enlarged view of Figure 21, Figure 24 is a plan view of Figure 23, and Figure 25 is a plan view of Figure 23. Illustration of front view of spare nursery stand, Fig. 26 is an explanatory view of storage of nursery support. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a side view of the entire vehicle, and FIG. 2 is a plan view of the same. The planting section 3 is mounted on the rear side of the traveling vehicle 1 via a link mechanism 2 so as to be able to move up and down. A side-strip fertilizer applicator 4 that fills the fertilizer beside the seedlings to be planted is mounted on the rear upper surface of the traveling vehicle 1.The front and rear wheels 5, 6, the driver's seat 7, and the steering handle 8 are provided on the traveling vehicle 1. The steps that form the body cover The front and rear wheels 5 and 6 are arranged below the step 9, the steering handle 8 is arranged behind the bonnet 10 on the front side of step 9, and the driver's seat 7 is arranged on the rear upper surface of step 9. In addition, a seedling mounting table 11 for planting five rows and a planting claw 12 are provided in the planting area 3 to perform rice transplanting to continuously plant five rows of seedlings. The fertilizer is sent out from the fertilizer 4 through the five-way transfer hose 14 by the air blower 13 by the air blower 13 in the side soil, and the fertilizer is buried, while the bonnet 10 side One spare seedling stand 1 5 spare seedling stands; Supply 1 and continue rice transplanting.

Further, as shown in FIGS. 3 to 15, a pair of left and right main frames 16 is provided on the traveling vehicle 1, and a front frame 17, a middle frame 18, and a rear frame 17 are provided.

The main frame 16 is formed by connecting the main frames 19 to each other in a substantially linear shape in a plan view, and the gate-shaped frame 20 is fixed to the rear side of the left and right rear frames 1 9. At the same time, the front bumper 22 and the towing hook 23 to which the power 21 is attached are fixed, and a pair of left and right step platforms 24.2 are provided outside the front and rear portions of the front frame 17 and the front portion of the rear frame 19. 5.26 is fixed, a long step table 27 is fixed to the entire width in the left and right direction above the middle part of the rear frame 19, and a pair of left and right step tables 28 is fixed to the upper side of the portal frame 20. In addition, a horizontal frame 30 having left and right step tables 29 is provided, the outside of each step table 24 to 26 is connected by a front side frame 31, and each side is connected by a rear side frame 32. Connect the steps 26 and 27 and the outside of the horizontal frame 30 to each step 24 to 2 Step 9 is mounted on the upper surface of the rear frame 9 and fixed, and the step 33 for getting on and off is fixed to the outside of the rear side frame 32 so as to be detachably bolted.

Further, as shown in FIG. 4, a pair of left and right receiving stands 34 and a frame member 35 are fixed to the left and right front frames 17 to mount the engine 36, and as shown in FIG. Left and right front axle cases 3 8 on both sides of 7 The front wheel 5 is mounted on each case 38, and the middle frame 18, which connects the front and rear frames 17 and 19, is fixed to the upper side of the case 38. In addition, a continuously variable hydraulic transmission case 39 transmitting the engine 36 output to the mission case 37 and a steering case 40 composed of a torque generator and a gear mechanism for amplifying the front wheels 5 of the steering wheel 8 In addition to fixing the front of the mission case 37 to the rear side of the mission case 37, the rear case 42 is fixed to the rear of the mission case 37 via the body case 41, and both sides of the portal frame 20 are fixed to the case 42. Then, the rear wheel 6 is mounted on the case 42. Further, a hydraulic lifting cylinder 43 is mounted on the upper side of the machine case 41, and the piston of the cylinder 43 is connected to the link mechanism 2 for supporting the planting section 3 so as to be able to move up and down.

As is clear from the above, the body main frame 16 that constitutes the fuselage is divided into three parts: a front frame 17, a middle frame 18, and a rear frame 19. The handling and assemblability can be improved compared to the one with the integrated shaku structure.

In addition, since the front axle case 38 is connected to the middle frame 18, the engine 36 etc. remain connected to the front frame 17 while the mission case 37 and the front axle case are connected. It is possible to easily perform attachment and detachment of the unit 38 with the unit 38, thereby improving the maintenance of the mission case 37 and the front axle case 38.

Further, since the cross-sectional area of the front frame 17 is made larger than that of the rear frame 19 and the engine 36 is supported by the front frame 17, the heavy engine 36 is mounted on the front frame 17. The strength of the fuselage can be improved, and the stability of the fuselage can be improved by improving the front-rear balance with the planting section 3 mounted on the rear side of the fuselage.

Further, as shown in FIGS. 4 and 9, both ends of the tank base frame 44 are fixed to the front sides of the left and right rear frames 19 to supply fuel to the engine 36. The front part is fixed to the base frame 44, the tank 45 is installed between the left and right rear frames 19, and the seat frame 46 is set up on the rear frame 19 as shown in Fig. 3. Then, the driver's seat 7 is attached to the upper side of the seat frame 46 via the sheet table 47, and the driver's seat 7 is disposed above the front of the tank 45. The muffler 49 of the engine 36 is attached to the lower surface of the left front side frame 31 supported by the left step stand 24, 25 via a stay 48, and the right step stand 2 A battery stand 50 is fixed to the front frame 31 on the right side to be supported by 4 ・ 25, and a battery 51 for starting the engine 36 is attached to the battery stand 50 as shown in FIG. The muffler 49 and the battery 51 are distributed on the lower side of the step 9 on both sides of the engine 36.

Further, as shown in FIGS. 16 to 19, a bottom plate 52 is fixed to the bottom surface of the engine 36, and four rubbers, front and rear and left and right, are attached to the receiving base 34 and the frame member 35. The left and right sides of the bottom plate 52 are fixed via the vibration isolating member 53, and the bearing cylinder 54 is detachably bolted and fixed to the right side of the lower surface of the bottom plate 52 to transmit to the bearing cylinder 54. The shaft 59 is rotatably supported, and the pulleys 55, 56 and belt

The front side of the transmission shaft 59 is connected to the output shaft 58 on the front side of the engine 36 via 57, and as shown in FIG. 7, the transmission shaft 5 is connected to the input shaft 60 on the front side of the speed change case 39. 9 The rear side is detachably connected so that the driving force of the engine 36 is transmitted to the transmission case 39 via the transmission shaft 59, and the PTO shaft 61a extends rearward from the rear of the transmission case 37. To transmit the power to the planting section 3, and extend the rear drive shaft 61b from the mission case 37 to the rear and input it to the rear axle case 42. The power is transmitted to the rear wheel 6 through the wheels 42. Also, power is transmitted from the mission case 37 to the front wheels 5 via the front axle case 38.

Further, as shown in FIG. 18, the middle of the frame member 35 is bent downward so as to be lower than the bottom surface of the front frame 17, and the front frame 17 and A rice transplanter in which the front and rear wheels 5, 6 and the engine 36 and the driver's seat 7 are mounted on the left and right main frames 16 at approximately the same height. The left and right installation width of the front frame 17 is made larger than the left and right width of the engine 36, and as shown in Fig. 7, the lower part of the engine 36 is wrapped around the front frame 17 that is the main frame 16, Ventilation space is secured between the front frame 17 and the engine 36 on both sides to smoothly discharge the hot air around the engine 36, improving the cooling efficiency of the engine 36 and installing the engine at a low level. Lower the weight of the machine.

In addition, both sides of the frame member 35 to which the vibration isolating member 53 for supporting the engine 36 can be attached are fixed to the front frames 17 of the left and right main frames 16. The strength of the frame 17 can be reduced to make it lighter, and the engine 36 is supported by the high-rigidity frame structure for anti-vibration. The engine 36 vibration will be reduced, the aircraft structure will be simplified, and the engine 36 will have improved anti-vibration functions.

Further, as shown in FIGS. 12 and 18, both sides of the gate-shaped seat plate 6 in a plan view are fixed approximately at the center of the left and right widths of the frame member 35, and the seat plate 6 is rearwardly moved from the frame member 35. 2, the front of the left and right front frames 1 is fixed by detachably fixing the seat plate 62 to the base 63 formed on the front side of the transmission case 40. The left and right widths of the frame member 35, whose both sides are fixed to 7, are approximately fixed to the mission case 37 via the steering case 40. Then, as shown in FIGS. 8 and 12, the mission case 37 is fixed to the frame member 35 to secure the strength of the frame member 35 against the vertical vibration of the engine 36. Improving the strength for connecting the left and right main frames 16 using the frame member 35 and supporting the engine 36, and improving the rigidity of the frame member 35 in the machine torsion direction to simplify the engine 36 support structure And lightweight At the same time, the frame member 35 and the mission case 37 are fixed approximately at the center of the mounting width of the left and right anti-vibration members 53, and the torsional deformation force generated in the left and right direction due to the vibration of the engine 36, etc. Also, by fixing the frame member 35 to the mission case 37, the strength of the frame member 35 is ensured, and the frame member 35 is prevented from being deformed and damaged to improve durability.

Also, as shown in FIGS. 7 and 17, a bearing cylinder 54 is detachably bolted and fixed to the lower surface side of the bottom plate 52 forming the engine stand in a separate structure, and the mounting and dismounting of the bearing cylinder 54 is performed. By adjusting the mounting posture and position, the maintenance of the belt 57 can be performed satisfactorily, so that the alignment of the belt 57 can be improved after the engine 36 is mounted, which not only improves the assembly work but also improves the belt assembly. Improve the tensioning accuracy of 57 and improve the life and reliability of belt 57.

Also, as shown in FIGS. 17 and 18, a generator 64 is provided in front of the engine 36, and the generator 64 is driven by the output shaft 58 of the engine 36. A frame 65 is fixed to the front side of the bottom plate 52 at approximately the center in the left-right width, and a generator 64 is fixed to the engine 36 and the frame 65 with bolts. Since the generator 64 is provided with a support for the generator 64, the generator 64 supports the strong vibrations of the engine 36 more strongly than the conventional structure in which the generator 64 is supported only by the engine 36. This reduces the size of the support members for the generator 64, such as the connection between the frame 65 and the engine 36, reduces costs, reduces the weight of the engine, and reduces the vibration of the engine 36 and the bottom plate 52. And improve the performance of this machine. ·

Further, as shown in FIG. 13 and FIGS. 20 to 24, a left and right output case 66, 67 for fixing the inside of the machine to the mission gas 37, and the output case 66-67. A left and right front case 68 fixed to the outside of the machine, a left and right gear case 69 slidably connected to the lower side of the front case 68, and a case cover 70 fixed to the upper side of the front case 68. To the left and right front The left and right output shafts 6 1-7 2 are inserted into the left and right output cases 6 6-6 7, and the left and right output shafts 7 1

7 2 and the transmission and differential output of the engine 36 are transmitted from the gear mechanism 73 to the left and right output shafts 71 1 and 72, and the left and right axles 74 are outwardly supported by the gear case 69. The left and right axles 74 support the left and right front wheels 5.

Further, as shown in FIGS. 13 and 20, a knuckle arm 75 is bolted and fixed to the upper outer side of the gear case 69, and is rotated left and right through a torque generator or the like by rotating the steering handle 8. A swinging steering arm 76 is provided below the steering case 40, the left and right knuckle arms 75 are connected to the steering arm 76 via the left and right tie doors 7, and the front case 68 is mounted inside the front case 68. The front wheel 5 is turned around the kingpin-shaped drive shaft 78 to be inserted in proportion to the steering angle of the steering handle 8.

Further, as shown in Figs. 21 and 22, the upper side of the drive shaft 78 is connected to the output shaft 71, 72 via a bevel gear 79, 80, and the lower side of the drive shaft 78. To the axle 74 via bevel gears 81, 82, and from the output shaft 71, 72 to the front wheels

And the knuckle arm 75 is extended upward in parallel with the drive shaft 78, and a cylindrical sliding and rotating support portion is provided above the knuckle arm 75.

The support portion 83 of the knuckle arm 75 is slidably and rotatably fitted to the outside of the cylinder portion of the case cover 70, and the knuckle is fitted to the gear case 69 and the case cover 70. Arm 75 is supported by both ends.

In addition, the lower side of the drive shaft 78 on which the bevel gear 81 is provided is supported on the gear case 69 by four shafts, and the beston gear 80 is spline-fitted. A case cover for supporting the lower surface of the holder 86 with a bearing 86, contacting a large and small diameter compression coil spring suspension spring 87 with the upper surface of the holder 85, and sliding the holder 85 vertically.

A suspension spring 87 is mounted inside the cylinder 70, and the drive shaft 78 and The front wheel 5 is resiliently pressed downward by the suspension spring 87 via the gear case 69, and the contact pressure of the front wheel 5 is maintained by the panel 87, which is approximately the same as the maximum compression of the spring 87. The long core shaft 88 is inserted into the center of the panel 87, and the panel 87 is compressed maximally according to the vehicle weight of the traveling vehicle 1, and the spring 8 is moved in a normal state where the four wheels 5 and 6 are grounded. 7 and keep the vehicle height constant, while running on a step where either the left or right rear wheel 6 or the front wheel 5 touches either the left or right, the front wheel 5 is lowered by the extension of the suspension spring 8 7 and the front wheel Maintain the ground pressure of 5 to prevent slip.

Further, as shown in FIGS. 23 and 24, a stopper 89 is integrally formed inside the knuckle arm 75, and left and right rotation regulating protrusions 90, 9 are provided on the front and rear outer sides of the front case 68. 1 is integrally formed, and the maximum turning angle of the steering handle 8 causes the stopper 89 to abut on one of the projections 90-91 to regulate the direction change of the front wheel 5. A stopper 89 is formed as long as the sliding range (suspension stroke) of the gear box 69 and the knuckle arm 75 due to the expansion and contraction of the spring 87, and the nut arm 75 slides by the front spring 87. The stopper 89 can be brought into contact with the protrusions 90-91 in the entire range of the movement.

As is evident from the above, a gear box 69 for mounting the front wheel 5 is provided below the front case 68 connected to the machine to form the front axle case 38 and the drive shaft that is a kingpin. In a rice transplanter provided with the gear box 69 so as to be rotatable around 8 and slidable upward and downward, a suspension spring 8 7, which is an elastic member for elastically pressing the gear box 69 downward, is used as a front case 6. 8. The other side of the knuckle arm 75 for fixing one side to the gear box 69 is slidably supported by the case cover 70. The upper and lower sides of the knuckle arm 75 are more firmly supported by a two-sided structure, and the knuckle arm 75 has a front side against a deformation force in a falling direction or a twisting direction. The sliding connection of the case 68 and the gear box 69 is configured to be able to be firmly supported.For example, the strength required for supporting the front wheel 5 is secured without increasing the shaft diameter of the drive shaft 78 serving as a kingpin, The front axle case 38 with the front wheel 5 is lighter and the manufacturing cost is reduced, and the knuckle arm 75 is slid outside the case cover 70 with the suspension spring 87 inside. To arrange the suspension structure.

In addition, a stop horn ° 89, which is a rotation restricting member corresponding to at least a vertical sliding range of the gear box 69, is provided inside the knuckle arm 75, and the stopper 89 is provided with a small space. The knuckle arm 75 or the front case 68 is also used to form the stop 89, which reduces the number of components by sharing the components, and rotates the gearbox 69 around the drive shaft 78. In addition to easily obtaining the strength of the stoppers 8 9 required to regulate the gear, the gears are brought into contact with the case cover 70 or the front case 6 8 side and the support 8 3 The downward movement of the box 69 is restricted, and a stopper such as a retaining ring at the time of the maximum extension of the front case 68 and the gear box 69 becomes unnecessary. Special parts The gearbox 69 has simplified the support structure, and the high-rigidity knuckle arm 75 has the advantage of providing a stop structure that is more advantageous in terms of strength, reducing manufacturing costs and improving durability. And so on.

Furthermore, in a rice transplanter in which the front wheel 5 which is a running wheel with respect to the machine is vertically movable via a suspension spring 87, when the front wheel 5 is at the highest position relative to the machine, it is in a normal state. The suspension spring 8 7 force is set so that the vehicle height does not change depending on the mounting weight such as a spare seedling like the suspension spring 8 7 structure in which the front wheel 5 is supported during ascent and descent. Rice transplanting is performed with the aircraft supported substantially horizontally to maintain seedling planting accuracy.Also, even if there is a step such as a recess in the cultivator, the ground pressure of the front wheel 5 is adjusted by the suspension springs 8 7 A suspension spring 87 is provided above the drive shaft 78 for transmitting the driving force to the front wheels 5 by securing the ground by the grounding action to reduce the slip of the front wheels 5 and maintain the running performance. A bearing 86 and a holder 85 are interposed between the suspension spring 8 and the suspension spring 8 7, for example, the mounting structure of the suspension spring 87 is simplified compared to a structure in which the suspension spring 87 is wound around the drive shaft 78, and the drive shaft 7 The suspension spring 87 is prevented from being deformed or rubbed by the rotational force of 8, and the support surface of the suspension spring 87 by the holder 85 is widened to prevent the spring 87 from falling down.

Also, the suspension panel 8 is set so that the front wheel 5 is separated from the machine by the step height on the running road surface and the front wheel 5 is grounded by setting the minimum vehicle height where the unit and the front wheel 5 are closest to each other due to the body weight. 7 to prevent the suspension spring 8 7 from being deformed by spare seedlings or 搭載 8 mounted during rice transplanting, to prevent the body from tilting due to the change in vehicle height due to changes in vehicle weight, and The slip of the front wheel 5 due to the step is reduced to prevent meandering traveling.

Further, as shown in Fig. 22, the output case 72 for fixing the front case 68 is mounted on the outer side of the machine with the output shaft 72 as a bearing 9 for two shafts.

Boss 9 3 of bevel gear 7 9 to be installed inside 6 8 is extended in the direction of output shaft 72, and the end surface of boss 9 3 is brought into contact with bearing 92 to receive the thrust load of bevel gear 79. The number of parts is reduced by eliminating the need for a collar that receives the thrust load of the bevel gear 79, the output shaft 72 also serving as a differential shaft is reduced, and the dimensional error in the two directions is reduced. The rush can be secured properly. Also, the uppermost part of the case cover 70 for receiving the suspension spring 87 is brought close to the lower surface side of step 9, and the case cover which is the receiving part of the spring 87 is

70 The head is provided with a rubber support member 70a for Step 9, so that the case cover 70 can be used as a mounting member for Step 9, and the step for supporting Step 9 is omitted to reduce the number of parts. And the front axle case 38 Step 9 and the main frame 16 are supported, and Step 9 is supported with high rigidity.

Further, as shown in FIGS. 14, 15 and 25, the seedling support column 94 having a gate shape as viewed from the side, and three steps in the vertical direction which are bolted and fixed to the column 94 in a cantilever manner. The seedling tray 95 is provided in the spare seedling stand 15, and the base 96 is fixed to the lower part of the gate of the seedling support 94, and is provided outside the front frame 17 forming the main frame 16. Attach the base 96 to the top of the outer surface of the step stay 2 4 · 2 5 detachably with bolts 9 7 and fix it, and remove the seedling support 94 from the step stay 24-25 supporting the step 9. Bonnet 10 Steps on both sides 9 Reserve left and right spare seedlings 15 on the outside of the machine and support them on the outside of nursery stand 94 4 Take out the seedlings from seedling tray 9 5 and place seedlings 1 1 To replenish.

As can be seen from the above, a step 9 is provided on the main frame 16 via the step steps 24 and 25, and a spare seedling for placing a spare seedling for replenishment is placed on the rice transplanter covering the upper side of the main frame 16 with the step 9. The attachment part of the seedling support 94 of the stand 15 is provided on the step stays 24, 25, and the seedling support 94 is mounted on the step stays 24, 25. The nursery stand 94 is also erected using the step stays 24, 25, which are high-rigidity members, to reduce weight and manufacture by reducing the number of parts for mounting the nursery stand 94 and the number of assembly steps. Reduce the cost, etc., and support the load of the spare seedling stand 15 by the rigidity of Step 9 to make it more advantageous in terms of strength, and simplify the machine structure for mounting the spare seedling stand 15.

Further, as shown in FIG. 26, an upright surface 98 and a falling surface 99 are formed on the base 96, and the upright surface 98 is brought into contact with the upper surface of the step stay 24, 25. And fix the base 96 with bolts 9 7 to fix the seedling stand posts 94 approximately vertically.Attach the seedling tray 95 to enable rice transplanting, while the step stays 24, 25 The base surface 9 6 is fixed by fixing the bolts 9 7 with the falling surface 9 9 in contact.

9 4 tilt the hood in the direction of bonnet 10 to support it, lower the overall height of the They can be transported on a two-tiered carrier on a rack or stored in a barn. As is clear from the above, the seedling support 94 and the base support 96 are integrally formed, and the nursery support 94 is tilted in the left-right direction of the machine so that it can be fixed. The use of a single part for the support post 94 reduces the number of parts, eliminates play at the joints of the parts, and also allows the seedling support post 94 to be tilted inside the machine to be fixed. The maximum height will be reduced, and spare seedling stands 15 will be stored in a compact when shipping from the manufacturing plant and when storing in the barn, etc., to reduce truck transportation costs and secure storage space.

Claims

The scope of the claims

1. A rice transplanter characterized in that the body frame constituting the body is divided into three parts: a front frame, an intermediate frame, and a rear frame.

2. The rice transplanter according to claim 1, wherein a front axle case is connected to the intermediate frame.

3. The rice transplanter according to claim 1, wherein a cross-sectional area of the front frame is formed in the dog from the rear frame, and the engine is supported by the front frame.

4. Install the front and rear wheels, the engine, and the driver's seat on the left and right main frames. Rice transplanter characterized by.

5. The rice transplanter according to claim 4, wherein both sides of a frame member to which a vibration isolating member for supporting the engine can be attached are fixed to the left and right main frames.

6. The rice transplanter according to claim 5, wherein the mission case is fixed to the frame member.

7. The rice transplanter according to claim 5, wherein the frame member and the mission case are fixed substantially at the center of the mounting width of the left and right vibration isolating members.

8. A step is provided on the main frame via a step step, and in a rice transplanter covering the upper side of the main frame with a step, a mounting portion for a seedling stand support of a spare seedling stand on which a supplementary seedling for replenishment is placed is provided on the step stay; A rice transplanter characterized by attaching a nursery support to a step.