JP4823575B2 - Ride type rice transplanter - Google Patents

Description

  The present invention relates to a riding type rice transplanter configured to selectively allow steering operation of a front wheel from above a traveling machine body and from the front of the traveling machine body, and more particularly, to a configuration of a cover that covers the traveling machine body.

Conventionally, during normal rice planting operations, the pilot can steer while riding on the traveling aircraft. There are known mobile agricultural machines such as a riding rice transplanter configured to operate a traveling machine in a state where the vehicle is in operation. In such a mobile agricultural machine, an opening is formed in the vehicle body cover that covers the traveling machine body so that the stepping part of the wheel can be visually recognized, and when the operator gets on the traveling machine body, from the opening of the vehicle body cover. There is one configured so that the steering operation can be performed while visually recognizing the stepping portion of the wheel (see, for example, Patent Document 1). In addition, as a mobile agricultural machine that enables the wheel to be visually recognized when the driver is on the traveling machine body, an opening is provided in the vehicle body cover along the line of sight from the driver on the traveling machine body toward the front wheel. Some are configured so that the steering operation can be performed while directly checking the wheels with eyes (for example, see Patent Document 2).
JP 2001-258337 A JP-A-5-304811

  In a conventional mobile agricultural machine, the steering operation can be performed while visually checking the wheels when the operator is on the traveling aircraft, but the pilot is operated from the front of the traveling aircraft while getting off the traveling aircraft. When performing the direction operation, the line of sight with respect to the front wheels and the rear wheels is blocked by the vehicle body cover, making it difficult to visually recognize, and the operability has deteriorated. In particular, the rear wheels should not be derailed from the bridge or road, such as when the rice transplanter is unloaded or loaded from the loading platform of a truck or other transporter using a bridge, or when traveling on a steep and narrow road in the mountains. When steering the vehicle, it has been desired that the position of the rear wheel be visible from the operator located in front of the fuselage.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  In Claim 1, it is supported by a traveling machine body (2) having a front wheel (7) and a rear wheel (9), a vehicle body cover (50) covering the traveling machine body (2), and a tilt mechanism (30). In a riding type rice transplanter (1) equipped with a steering handle (26) that can be rotated back and forth, an operator can adjust the position of the seat (60) on the traveling machine body (2) and the traveling machine body (2). The steering handle (26) can be selectively operated from a front position, a front notch (50e) is provided in the vicinity of the front wheel (7) of the vehicle body cover (50), and the rear wheel ( 9) A rear opening (50f) is provided in the vicinity of 9), and the front notch ( 50e) and the rear opening (50f) (7) or the rear wheel (9) is configured so as to be visible, and the front notch (50e) and the rear opening (50f) are formed from the operator positioned on the seat (60) on the traveling body (2). The front wheel (7) or the rear wheel (9) is configured to be visible, and the front notch (50e) is formed by notching the outer periphery of the vehicle body cover (50), and the rear opening ( The width of the middle step (50c) outside the portion where 50f) is opened is configured to be substantially constant.

In a second aspect of the present invention, in the riding type rice transplanter according to the first aspect, the rear opening (50f) provided in the vehicle body cover (50) is abbreviated in plan view so as to taper from the rear side to the front side. The rear opening (50f) is formed in a triangular shape, and includes a plurality of slit-shaped rear openings (50f,...) With partition walls (50g, 50g) at predetermined intervals in the front-rear direction. The rear opening (50f...) Of the rear opening is configured to have a larger opening area, and the opening is formed so that the opening extends to the left and right inner sides of the body. The opening is located below both sides of the seat (60), and enables the operator to look into the vicinity of the rear wheel only by facing the lower side while the operator is seated .

  According to claim 3, in the riding type rice transplanter according to claim 1, the rear opening (50f) provided in the vehicle body cover (50) has an operator's position located in front of the traveling machine body (2). A partition wall (50 g) that is inclined in a front-to-back and low-to-low direction is provided at predetermined intervals substantially in parallel with the line of sight with respect to the rear wheel (9).

  As effects of the present invention, the following effects can be obtained.

In Claim 1, it is supported by a traveling machine body (2) having a front wheel (7) and a rear wheel (9), a vehicle body cover (50) covering the traveling machine body (2), and a tilt mechanism (30). In a riding type rice transplanter (1) equipped with a steering handle (26) that can be rotated back and forth, an operator can adjust the position of the seat (60) on the traveling machine body (2) and the traveling machine body (2). The steering handle (26) can be selectively operated from a front position, a front notch (50e) is provided in the vicinity of the front wheel (7) of the vehicle body cover (50), and the rear wheel ( 9) A rear opening (50f) is provided in the vicinity of 9), and the front notch ( 50e) and the rear opening (50f) (7) or the rear wheel (9) is configured so as to be visible, and the front notch (50e) and the rear opening (50f) are formed from the operator positioned on the seat (60) on the traveling body (2). The front wheel (7) or the rear wheel (9) is configured to be visible, and the front notch (50e) is formed by notching the outer periphery of the vehicle body cover (50), and the rear opening ( Since the width of the middle step (50c) outside the portion opening 50f) is substantially constant, the front wheel can be used when the driver operates from the front of the aircraft while getting off the traveling aircraft. Alternatively, the steering operation can be performed while confirming the cutting angle and position of the rear wheel and the surrounding state, and the operability is improved.
Further, the steering operation can be performed while confirming the turning angle of the front wheel while the operator is on the steering body, and the operability is improved.

Moreover, it is possible to prevent the fender function for the front wheel in the vehicle body cover from being impaired by reducing the opening area of the opening to the minimum necessary. In addition, even when the front wheel faces in one of the left and right directions, the front part or the rear part of the front wheel can be seen reliably, so that the visibility is improved.
Further, since the width of the middle step (50c) outside the rear opening (50f) is made substantially constant, the strength can be secured.

In a second aspect of the present invention, in the riding type rice transplanter according to the first aspect, the rear opening (50f) provided in the vehicle body cover (50) is abbreviated in plan view so as to taper from the rear side to the front side. The rear opening (50f) is formed in a triangular shape, and includes a plurality of slit-shaped rear openings (50f,...) With partition walls (50g, 50g) at predetermined intervals in the front-rear direction. The rear opening (50f...) Of the rear opening is configured to have a larger opening area, and the opening is formed so that the opening extends to the left and right inner sides of the body. The opening is located below both sides of the seat (60), and it is possible to look into the vicinity of the rear wheel only by facing the lower side while the operator is seated. The left and right direction and position And it is configured to be able to check the status of its surrounding.

  According to claim 3, in the riding type rice transplanter according to claim 1, the rear opening (50f) provided in the vehicle body cover (50) has an operator's position located in front of the traveling machine body (2). Since the partition walls (50g) which are inclined in the front height and the rear direction are provided at predetermined intervals substantially parallel to the line of sight with respect to the rear wheel (9), the inclination direction of the partition walls causes the rear wheel to splash mud and the like toward the opening. It becomes a direction intersecting with the flying direction, and mud from the rear wheel is prevented from passing through the opening by the partition wall, so that it is possible to prevent the mud from splashing up to the upper surface of the middle step. In addition, the rear wheels are easily visible.

  Next, embodiments of the invention will be described.

  FIG. 1 is a perspective view showing an overall structure of a rice transplanter according to an embodiment of the present invention, FIG. 2 is a perspective view of a traveling machine body, FIG. 3 is a side view of a front part of the traveling machine body, and FIG. FIG. 5 is a perspective view showing the configuration of the posture holding means of the upper column.

  6 is a side view showing the tilt position of the steering handle, FIG. 7 is an upper perspective view of the traveling body, and FIG. 8 is a plan view of the rear part of the vehicle body cover.

  FIG. 9 is a side sectional view of the rear part of the vehicle body cover, FIG. 10 is a side view showing the seat support structure, and FIG. 11 is a perspective view showing the seat support structure.

  12 is a front view of the sheet, FIG. 14 is a rear view of the sheet, FIG. 15 is a plan view of the sheet, FIG. 16 is a bottom view of the sheet, and FIG. 17 is a side view of the sheet.

  In the present embodiment, the mobile agricultural machine is described as a riding type rice transplanter 1, but this is not particularly limited, and a riding type management machine or a tractor that can be steered from the front in a lowered state may be used. As shown in FIGS. 1 and 2, the rice transplanter 1 includes a traveling machine body 2 and a planting device 17 that is mounted on the rear portion of the traveling machine body 2 so as to be movable up and down. The traveling machine body 2 includes a main frame 3 composed of a pair of left and right frames mainly extending in the longitudinal direction of the body, and a mission case 4 composed of an integrated case body that is disposed between the left and right main frames 3 in the longitudinal direction of the body. And a transmission frame 5 that is connected to the transmission case 4 between the left and right main frames 3 and extends downward in the front sectional view.

  A front axle case 6 projects from left and right side surfaces of the transmission case 4 in the longitudinal direction of the vehicle body, and front wheels 7 are attached to the left and right ends of the front axle case 6. A rear axle case 8 is attached to the rear end portion of the transmission unit frame 5, and rear wheels 9 are attached to the left and right ends of the rear axle case 8. A pair of left and right support frames 10 are erected on the rear axle case 8, and a planting device 17 is connected to the support frame 10 via a parallel link mechanism including upper and lower links 11 and 12.

  The planting device 17 includes a pair of left and right transmission cases 13 that are connected to each other via a universal joint shaft and a PTO shaft that protrudes rearward from the rear end of the transmission case 4, and a traveling machine body 2. Mounted on the left and right sides of each planting transmission case 13, the seedling mount 14 arranged at the front height and rear low so that the upper end approaches the rear part, the float 15 disposed on the lower surface of each planting transmission case 13, and And a planting mechanism with planting claws that divide and plant one by one from the seedling mat on the seedling platform 14 while moving up and down between the farm scene and the lower end of the seedling platform 14. Yes. A lifting hydraulic cylinder 16 provided at the rear end of the main frame 3 is attached in association with the upper and lower links 11 and 12 so that the planting device 17 can be lifted and lowered with respect to the traveling machine body 2.

  A vehicle body cover 50 is attached to the main frame 3 so as to cover the traveling machine body 2 from above, and a seat 60 is disposed above the vehicle body cover 50. A front bonnet (engine hood) 20 is disposed in front of the seat 60 and is fixed to the upper surface of the front portion of the vehicle body cover 50. Spare seedling stands 18 are arranged on the left and right sides of the front bonnet 20, and as shown in FIG. 3, in the front bonnet 20, the engine 21 and its accessories are disposed on the rear side thereof, such as a carburetor and speed governor. A machine, an air muffler, a starter coiler (rope starter), a silencer, and the like are arranged. Above the engine 21, a fuel tank 22 is fixedly disposed on a frame erected from the engine 21.

  A mission case 4 is disposed below the engine 21. The mission case 4 includes a steering drive mechanism 23 for steering on the front side and a power transmission mechanism for transmitting power to the travel drive system and the PTO drive system on the rear side. In addition, a cylindrical lower column 24 is erected on the front end side of the upper surface of the mission case 4, and a steering lower shaft 25 is disposed in the lower column 24 as shown in FIG. 4 is connected to a steering drive mechanism 23 in the interior. On the other hand, the upper end of the steering lower shaft 25 is connected to the lower end of a handle shaft 27 having a steering handle 26 attached to the upper end so as to be bent. The handle shaft 27 is disposed in a cylindrical upper column 28.

  The upper end of the lower column 24 and the lower end of the upper column 28 are connected via a tilt mechanism 30 so as to be able to tilt forward and backward, and the inclination angle of the upper column 28 is held at the outer periphery of the tilt mechanism 30 in a plurality of stages. Posture holding means 31 is provided. As shown in FIG. 5, the tilt mechanism 30 laterally moves a pair of left and right lower brackets 32 fixed to the upper end of the lower column 24 and a pair of left and right upper brackets 33 fixed to the outer periphery of the lower end of the upper column 28. It is configured to be pivotally connected via a pivot 34.

  The posture holding means 31 includes a plurality of (three in this embodiment) locking grooves 32a, 32b, and 32c formed in a concave shape at positions appropriately separated from each other on the eccentric arc-shaped upper end surface of the lower bracket 32, and A horizontal shaft 35 pivotally supported by the rear end piece 33a of the upper bracket 33, an engagement hook 36 fixed to one end of the horizontal shaft 35, and an urging force for downwardly biasing the engagement hook 36 When the upper column 28 is changed to a predetermined rearward or forward inclination angle, the engagement hook 36 is selected as any one of the plurality of locking grooves 32a, 32b, and 32c. By being engaged, the tilting posture of the upper column 28 can be adjusted and maintained.

  As shown in FIG. 6, in the present embodiment, the upper column 28 moves back and forth, and the posture thereof is inclined rearward of the traveling machine body 2 (inclined approximately 30 degrees clockwise relative to the vertical line). A posture I, a second posture II tilted forward in front of the traveling vehicle body 2 approximately 60 degrees in the counterclockwise direction from the first posture, and a large amount approximately forward 88 degrees in the counterclockwise direction from the first posture. It can be selectively changed to the third posture III inclined forward. When the upper column 28 is in the first posture I, the engagement hook 36 is engaged with the rearmost locking groove 32a of the upper surface of the lower bracket 32, and the upper column 28 is in the second posture II. The engaging hook 36 is engaged with the locking groove 32b at the front and rear center position. In the case of the third posture III, the engagement hook 36 is engaged with the front engagement groove 32c.

  In addition, an opening 20a having a substantially U shape in plan view is provided from the upper surface side to the front end of the front bonnet 20 that covers the tilt mechanism 30 from the upper surface side to the front end. The opening 20a is covered with a movable cover body 40 that moves back and forth integrally with the upper column 28, and an auxiliary cover body 41 as an exterior product connected to the movable cover body 40 so as to be rotatable upward. . The auxiliary cover body 41 is provided so as to be rotatable up and down around the front end side of the movable cover body 40. That is, a support pipe 43 is fixed laterally at the tip of a support bracket member 42 that protrudes upward from the lower portion of the upper column 28, while a reinforcement-use operation that is bent and formed in a U-shape on the back surface of the auxiliary cover body 41. The member 44 is fixed, and a pair of left and right shaft portions 44a of the operation member 44 are rotatably inserted into both ends of the support pipe 43 so that the auxiliary cover body 41 can be turned up and down around the shaft portion 44a. Has been.

  The operation member 44 is associated as an operation unit of the posture holding means 31. That is, a pin 44b protrudes from the shaft 44a of the operation member 44 at an eccentric position, and one end of the link 46 is rotatably connected to the pin 44b, while the other end of the link 46 is connected to the engagement hook 36. Is pivotally connected to the tip of an arm 47 fixed to the other end of the horizontal shaft 35 that rotates integrally with the horizontal axis 35. Thus, the operating member 44, that is, the lower end side of the auxiliary cover body 41 is urged by the urging force of the urging spring 37 so as to approach the surface of the front bonnet 20.

  Thus, when the lower ends of the auxiliary cover body 41 and the operation member 44 are rotated upward by a predetermined angle so as to be separated from the surface of the front bonnet 20, the link 46 and the arm 47 are resisted against the biasing force of the biasing spring 37. The tip of the engagement hook 36 is rotated so as to be disengaged from the locking grooves 32a, 32b, and 32c, and the engagement state between the engagement hook 36 and the locking grooves 32a, 32b, and 32c is released. Subsequently, in a state where the hand is released from the auxiliary cover body 41 (a state where the inner surface of the lower end side of the auxiliary cover body 41 is in sliding contact with the outer edge of the opening 20a of the front bonnet 20), the operator holds the steering handle 26. By rotating, the upper column 28 can be shifted to an arbitrary posture.

  Accordingly, the upper column is selectively bent in the front-rear direction by the tilt mechanism, and the steering handle (round handle) 26 at the upper end of the upper column 28 is moved to the rear position toward the seat 60 and the front position in front of the traveling machine body 2. Since the steering handle 26 is set at the front position, the driver who gets off the traveling machine body 2 holds the steering type rice transplanter 1 in the field while holding the steering handle 26 while being positioned in front of the traveling machine body 2. It is possible to perform operations such as crossing over from the top or placing it on a track. Further, by setting the steering handle 26 to the rear position, the driver can steer the riding type rice transplanter 1 while riding on the traveling machine body 2.

  Further, as shown in FIG. 7, the vehicle body cover 50 has left and right front steps 50a and 50a on the left and right sides of the front bonnet 20, a rear step 50b on the rear side of the seat 60, and front steps 50a and 50a and rear steps. The middle step 50c is provided between the first step 50b and the second step 50b. The rear step 50b is connected to the middle step 50c by a connecting portion 50d that rises rearward and upward from the middle step 50c, and the left and right sides of the connecting portion 50d are fenders for the rear wheels 9,9. Here, the vehicle body cover 50 is integrally formed of a synthetic resin by injection molding, and the weight reduction, the number of parts are reduced, and the workability during assembly is improved.

  In the vehicle body cover 50, front notches 50e and 50e are provided near the front wheels 7 and 7 of the left and right front steps 50a and 50a. Each front notch 50e is disposed above the front wheel 7 of the front step 50a and on the inner side of the front wheel 7 so that the driver who gets off the traveling body 2 is positioned in front of the traveling body 2. As described above, when the steering handle 26 is rotated and operated by the tilt mechanism 30 to the front position in front of the machine body, the rear part of the front wheels 7 and 7 can be visually recognized, and its right and left direction and position and its periphery It is configured to be able to check the state of the. At the same time, when the driver is positioned on the traveling machine body 2, each front notch 50 e makes it possible to visually recognize the front portion of the front wheel 7, and confirms the direction and position in the left-right direction and the surrounding state. It is configured to be able to.

  In the present embodiment, the front notches 50e and 50e are arranged so that the outer peripheral portions of the left and right front steps 50a and 50a are located almost directly above the front wheels 7 and 7, respectively. The outer peripheral portion has a shape cut out in a substantially V shape in plan view so as to taper from the outside to the inside. As a result, the opening area of the front notches 50e and 50e provided at the front portion of the vehicle body cover 50 is minimized, and the fender function for the front wheels 7 and 7 at the front steps 50a and 50a, so-called mud splash, is prevented. It is possible to prevent the function to be impaired from being impaired. Further, even when the front wheels 7 and 7 face in either one of the left and right directions, the front part or the rear part of the front wheels 7 and 7 can be seen reliably, so that the visibility is improved.

  As shown in FIGS. 8 and 9, rear openings 50f and 50f are also provided in the vicinity of the left and right rear wheels 9 and 9 of the middle step 50c. The left and right rear openings 50f and 50f are arranged in front of the rear wheels 9 and 9 in the middle step 50c, in the left and right directions with respect to the rear wheels 9 and 9, and are lowered from the traveling body 2 to the pilot. Is positioned in front of the traveling machine body 2, and when the steering handle 26 is rotated and operated to the front position in front of the machine body by the tilt mechanism 30 as described above, the front part of the rear wheels 9, 9 can be visually recognized. As shown, the horizontal direction and position, the state of the periphery, and the like can be confirmed.

  The rear openings 50f and 50f are formed in a substantially triangular shape in plan view so as to taper from the rear side to the front side of the body, and are configured in a slit shape with partition walls 50g and 50g at predetermined intervals in the front-rear direction. Has been. That is, the rear openings 50f and 50f have a larger opening area toward the rear, and the rear openings 50f and 50f are formed so that the openings expand toward the left and right inner sides of the body, and the rearmost rear opening 50f is located below both sides of the seat 60. Thus, it is possible to look into the vicinity of the rear wheel just by facing the lower side while the operator is seated. In addition, the width of the middle step 50c outside the rear openings 50f and 50f is made substantially constant to ensure the strength.

  The bulkheads 50g and 50g are inclined forwardly and rearwardly in the middle step 50c so as to be substantially parallel to the line of sight of the rear wheels 9 and 9 of the operator who operates the steering handle 26 and is positioned in front of the traveling body 2. It is integrally molded in the state. Therefore, in the rear openings 50f and 50f, the inclination direction of the partition walls 50g and 50g intersects (substantially orthogonal) with the direction in which the rear wheels 7 and 7 splash mud and the like toward the rear openings 50f and 50f, The mud from the rear wheels 9, 9 is prevented from passing through the rear openings 50f, 50f by the partition walls 50g, 50g, and the mud splashing up to the upper surface of the middle step 50c is prevented. In addition, the rear wheel 9 is easily visible.

  In this way, when the operator performs an operation from the front of the body with the operator getting off the traveling body, the direction and position of the front wheels 7 and 7 or the rear wheels 9 and 9 are visually recognized. Since the opening which can be provided is provided, steering operation can be performed with the steering handle 26 while confirming the cutting angle of the front wheels 7 and 7 or the rear wheels 9 and 9, and the operability is improved. Further, even when the operator is on the steering body, the steering operation can be performed with the steering handle 26 while confirming the turning angle of the front wheels 7 and 7, and the operability is improved.

  Further, a plurality of slip stoppers 50h, 50h,... Are provided between the left and right rear openings 50f, 50f on the upper surface of the middle step 50c. The slip stoppers 50h, 50h,... Are formed in a circular arc shape in plan view, are located on a concentric circle having a center behind the seat 60, and are disposed so as to spread forward from the rear end of the middle step 50c. In this way, the non-slip 50h, 50h, etc. become non-slip when moving up and down from the front or side of the step or when moving, centering on the buttocks while kicking with the foot while sitting on the seedling joint etc. It prevents the back of the shoe from getting caught when turning to the left or right.

  The left and right ends of the anti-slip 50h, 50h,... Are extended to the vicinity of the drain holes 50j, 50j provided in the left and right rear sides of the rear opening 50f, 50f or the middle step 50c. Rain that has fallen on 50c, mud that has been introduced, and water flow along the anti-slip, and flow down from the rear openings 50f and 50f or drain holes 50j and 50j. Similar slip stoppers are provided in the previous steps 50a and 50a.

  A pair of left and right openings are also provided at the left and right center of the connecting portion 50d between the rear step 50b and the middle step 50c of the vehicle body cover 50. As shown in FIGS. A sheet support stay 55 that is substantially U-shaped in plan view is projected toward the top. The seat support stay 55 is for supporting the seat 60 and is bent in a letter shape when viewed from the side. The left and right rear ends of the seat support stay 55 are below the rear step 50b, and the upper and lower links of the link mechanism. It is fixed to the support frame 10 which supports 11 * 12. And the front part of the sheet | seat support stay 55 is arrange | positioned substantially parallel above the middle step 50c, and the sheet | seat 60 is supported on it.

  That is, by supporting the seat support stay 55 that supports the seat 60 on the opposite side of the support frame 10 with respect to the upper and lower links 11 and 12, when the operator is seated on the seat 60, The moment applied to the front and lower sides of the support frame 10 and the moment applied to the rear and lower sides of the support frame 10 due to the weight of the planting device 17 are balanced. Thereby, the rigidity of the support frame 10 may be smaller than the configuration in which the planting device 17 is supported by the support frame 10 like a cantilever, and the size and weight of the support frame 10 itself are reduced to reduce the cost. be able to.

  Further, by supporting the seat 60 on the seat support stay 55 projecting obliquely forward and upward from the connecting portion 50d of the vehicle body cover 50, a space 56 is formed below the middle step 50c and the seat 60, and the seat 60 is formed in the space 56. It is configured so that a driver in a seated state can place his / her foot. Therefore, in order to perform operations such as replenishing seedlings to the seedling stage 14 of the planting device 17 from the preliminary seedling stage 18 while the operator is seated on the seat 60, the operator moves the posture from the front side to the rear side. In the case of changing to the state of facing, the foot can be placed in the space 56 below the seat to firmly support the body, and the workability can be improved.

  A space continuous with the space 56 below the seat 60 is formed on the middle step 50c between the seat 60 and the front bonnet 20 and on the middle step 50c on the left and right sides of the seat 60. 56 is configured to allow the operator to place his / her foot. As a result, the driver can freely place his / her feet not only on the front side of the seat 60 but also on the middle step 50c on both the left and right sides, so that the body can be firmly supported even in a posture facing backward. The workability when performing seedling replenishment work can be improved.

  Further, as shown in FIGS. 12 to 17, the seat 60 includes a seating portion 61, a backrest portion 62, and a connecting portion 63 that connects the seating portion 61 and the backrest portion 62. The connecting portion 63 is formed in a substantially L shape in a side view, and fixes the seat portion 61 on the front and rear horizontal portions below the connecting portion 63, while fixing the backrest portion 62 on the front surface of the upper vertical direction portion. 60 is configured. Here, the seat part 61 and the backrest part 62 are formed by blow molding with synthetic resin or the like, so that weight reduction and cost reduction of the seat 60 are achieved.

  The seat 60 is provided with a recessed portion 61a that is recessed downward in the center of the upper surface of the seating portion 61, and a cushion 65 having elasticity is attached to the recessed portion 61a, so that an impact from the seating portion 61 on the seated operator is prevented. It is configured to absorb. The mounting recess 61a of the cushion 65 is provided with a pair of left and right front recesses 61b and 61b and a pair of left and right rear recesses 61c and 61c that are compressed to form a compression portion. It has been. The front recesses 61b and 61b are respectively provided with fixing holes 61d and 61d and draining holes 61e and 61e, and the rear recesses 61c and 61c are fixed downward. Holes 61f and 61f and drain holes 61g and 61g are formed, respectively.

  A bracket 66 is fixed to the front concave portions 61b and 61b via fixing holes 61d and 61d, and an elastic member 67 is fixed to the rear concave portions 61c and 61c via fixing holes 61f and 61f. As shown in FIGS. 10 and 11, the bracket 66 and the elastic member 67 are placed and fixed on the seat support stay 55, and the seat 60 is placed above the vehicle body cover 50 as described above. It arrange | positions with the space 56 which can arrange | position a leg | foot. In the seating portion 61, rainwater and the like are drained from the drain holes 61e and 61g of the recesses 61b and 61c, so that the water does not easily accumulate in the recesses 61a, 61b, and 61c.

  The recessed portion 61a of the seat portion 61 is further provided with a central recessed portion 61h that is recessed downward between the left and right rear recessed portions 61c and 61c. Fixing holes 61j and 61j and water draining holes 61k penetrating downward in the central recess are drilled, and the lower end portion of the connecting portion 63 is fixed from below through the fixing holes 61j and 61j. Further, a lower concave portion 62a that is recessed rearward is also provided at the lower front portion of the backrest portion 62, and fixing holes 62b and 62b are formed in the concave portion 62a. Then, the connecting portion 63 fixed to the central recessed portion 61h of the seating portion 61 extends upward from the bottom surface of the seating portion 61 along the rear end surface, and the upper end portion of the connecting portion 63 extends to the lower recessed portion 62a of the backrest portion 62. It is fixed via fixing holes 62b and 62b. Thus, the seat portion 61 and the backrest portion 62 are connected, and the seat 60 is constricted by the connecting portion 63.

  Further, the seating portion 61 is formed in a substantially elliptical shape in plan view, and is arranged so that the maximum diameter portion faces the left-right direction of the body. Curved notches 61m and 61m that are recessed from the outer periphery toward the front, rear, left, and right centers of the seating portion 61 are provided between the maximum diameter portions on the left and right sides of the seating portion 61 and the rear end portions that slightly protrude rearward. The rear end portion is formed in a tapered shape so as to narrow toward the connecting portion 63 in plan view. The notches 61m and 61m are sized so that a leg (hook) can be easily put in a state where the operator is seated on the seat 61 with the body facing rearward or sideward. As a result, the operator faces the front in order to perform operations such as replenishing seedlings from the preliminary seedling stage 18 to the seedling stage 14 of the planting device 17 while sitting on the seat 61. The leg can be moved to the notch 61m along the outer periphery of the seating portion 61 when changing from the rear to the rear or sideward, so that the angle toward the rear may be larger than the conventional angle. It is possible to work with the body firmly facing backwards. As a result, the work becomes easier and workability is improved.

  In addition, curved notches 62c and 62c are provided between the upper and lower halfway portions on the left and right sides of the backrest portion 62 and the lower end portions so as to be recessed from the outer periphery of the backrest portion 62 toward the upper, lower, left and right centers, and the lower end portions are connected portions It is formed in a tapered shape so as to become narrower in a front view toward 63. The notches 62c and 62c are sized so that the legs (thick thighs) can be easily inserted in a state in which the operator is seated on the seat 61 with the body rearward or sideward. As a result, in the same manner as described above, the operator turns the posture forward in order to perform operations such as replenishing seedlings to the seedling stage 14 of the planting device 17 from the preliminary seedling stage 18 while sitting on the seating portion. Since the legs can be moved to the notches 62c and 62c of the backrest part 62 when changing from the sitting state to the rearward or sideward state, it is possible to work with the body firmly facing backwards Become. As a result, the work becomes easier and workability is improved.

  Therefore, in order to obtain the above-described effect, it is only necessary to provide the notches 61m and 62c in at least one of the seat 61 or the backrest 62. However, as shown in the present embodiment, the seat 61 and the backrest 62 are not provided. The notches 61m and 62c are arranged so as to face each other between them, and a substantially U-shaped recess 60a is provided from the seating portion 61 to the backrest portion 62 of the seat 60, so that the operator can easily place the leg in the recess 60a. The posture can be easily changed from a state of facing forward to a state of facing rearward or sideward while sitting on the seating portion 61. Therefore, the operator can easily work with the body facing backward or sideward in the sitting state, and the workability is further improved.

  Further, the left and right cutout portions 61m and 62c of the seat portion 61 and the backrest portion 62 are provided so as to be recessed to the left and right center side of the seat from the support position of the left and right elastic members 67 that support the seat portion 61, respectively. As a result, the operator changes the posture backward while arranging the elastic member with a lateral width sufficient to stabilize the seating portion 61 so that the body does not tilt to the left and right in a state where the pilot is seated on the seating portion. At this time, the legs can be easily put in the notches 61m and 62c, and the body can be easily directed rearward or sideward.

  In addition, the backrest 62 is provided with a recessed portion 62d that is recessed rearward at the upper front portion, and a recessed portion 62e that is recessed forward at substantially the same height as the recessed portion 62d at the upper rear surface. And each recessed part 62d * 62e is extended in the left-right direction, and the pipe-shaped handrail part 62f is formed in the circumference | surroundings of this recessed part 62d * 62e. That is, the pipe-shaped handrail portion 62f is formed so that the periphery of the backrest portion 62 can be gripped by a hand. In this way, the backrest part 62 makes it easy to grasp the vicinity of the upper part as the handrail part 62f, and when the operator is seated on the seating part 61, the posture is changed from the front-facing state to the rear-facing state, When getting on and off the airframe, the handrail portion 62f or the handrail portion 62f and the steering handle 26 are grasped to support the body. In addition, the recessed parts 62d and 62e of the backrest part 62 are good also as only one of a front surface or a back surface, and it is good also as a perforation, In these cases, the same effect as the above can be acquired.

  Further, as shown in FIG. 8, on the left and right sides of the seat 60, a control operation tool 70 that controls the planting depth of the seedling by the planting device 17 is disposed in the vicinity of the notch 61 m provided in the seat 61. Has been. The operating tool 70 is configured as a sensitivity lever that changes the reference of the movable range of the sensor float for detection, for example, and protrudes forward from the opening 50k provided in the connecting portion 50d of the vehicle body cover 50. The gripping portion is provided behind the maximum diameter portion of the seating portion 61 so as to be positioned on the left and right center side of the seat.

  Therefore, for the operator who is seated on the seating portion 61 of the seat 60, the position of the planting depth control operation tool 70 is easily accessible, and the notch 61m of the seating portion 61 allows the planting depth to be adjusted. A hand can be extended without interfering with the seating portion 61 toward the control operation tool 70, and operability is improved. Moreover, the control operation tool 70 of the planting depth can be efficiently arranged in a limited space near the seat 60, and the airframe can be made compact.

  Further, since the planting depth control operation tool 70 is arranged on the seat left and right center side with respect to the maximum diameter portion of the seating portion 61, when the operator walks on the vehicle body cover 50, the seating operation is performed. Since the maximum diameter portion of the portion 61 is avoided and the outside of the seat 60 is walked, it is difficult for the operator's leg to hit the control operating tool 70 at the planting depth, thereby preventing erroneous operation or damage of the operating tool 70. it can.

The perspective view which showed the whole structure of the rice transplanter which concerns on one Example of this invention. The perspective view of a traveling body. The side view of a traveling machine body front part. The perspective view which shows the structure of a tilt mechanism. The perspective view which shows the structure of the attitude | position holding means of an upper column. The side view which shows the tilt position of a steering handle. The upper perspective view of a traveling body. The top view of a vehicle body cover rear part. Side surface sectional drawing of a vehicle body cover rear part. The side view which shows the support structure of a sheet | seat. The perspective view which shows the support structure of a sheet | seat. The perspective view of a sheet | seat. The front view of a sheet | seat. The rear view of a sheet | seat. The top view of a sheet | seat. The bottom view of a sheet | seat. The side view of a sheet | seat.

1 Rice transplanter (mobile farm machine)
2 traveling machine body 7 front wheel 9 rear wheel 50 body cover 50e front notch 50f rear opening 50g partition

Claims (3)

  A traveling machine body (2) having a front wheel (7) and a rear wheel (9), a vehicle body cover (50) covering the traveling machine body (2), and a tilt mechanism (30) are supported and can be rotated back and forth. In the riding type rice transplanter (1) provided with the steering handle (26), the operator can determine from the position of the seat (60) on the traveling machine body (2) and the position in front of the traveling machine body (2). The steering handle (26) can be selectively operated, a front notch (50e) is provided in the vicinity of the front wheel (7) of the vehicle body cover (50), and a rear part in the vicinity of the rear wheel (9). The front notch (50e) and the rear opening are provided from the operator located in front of the traveling machine body (2) in a state where the opening (50f) is provided and the steering handle (26) is rotated forward of the traveling machine body. (50f) via the front wheel (7) or the rear wheel ( ) In such a manner that it can be visually recognized from the driver located on the seat (60) on the traveling body (2) through the front notch (50e) and the rear opening (50f). The rear wheel (9) is configured to be visible, and the front notch (50e) is formed by notching the outer periphery of the vehicle body cover (50) and outside the portion where the rear opening (50f) is opened. A riding type rice transplanter characterized in that the width of the middle step (50c) is substantially constant. In the riding type rice transplanter according to claim 1, the rear opening (50f) provided in the vehicle body cover (50) is formed in a substantially triangular shape in plan view so as to be tapered from the rear side to the front side. The rear opening (50f) includes partition walls (50g, 50g) at predetermined intervals in the front-rear direction, and is configured into a plurality of slit-shaped rear openings (50f,...), And the plurality of rear openings (50f) ..) is configured so that the rear opening has a larger opening area, and the opening is formed so that the opening extends inwardly on the left and right sides of the machine body. The rearmost opening of the plurality of rear openings (50f) is the seat. (60) A riding type rice transplanter characterized in that it is possible to look into the vicinity of the rear wheel only by facing the lower side while the operator is seated while being positioned below both sides of (60) .   The riding type rice transplanter according to claim 1, wherein a rear opening (50f) provided in the vehicle body cover (50) has a rear wheel (9) of a driver located in front of the traveling machine body (2). Riding type rice transplanter characterized in that partition walls (50 g) inclined in parallel to the front and rear are provided at predetermined intervals substantially parallel to the line of sight.

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