JP4753283B2 - Ride type rice transplanter - Google Patents

Description

  The present invention relates to a riding-type rice transplanter configured to selectively enable front wheel steering operation from above a traveling machine body and from the front of the traveling machine body.

  Conventionally, during normal rice planting work, the operator can steer while riding on the traveling machine. In Patent Document 1, an engine and a transmission case are mounted on the rear side of a traveling machine body equipped with four wheels, and are erected on the front frame of the traveling machine body. A configuration is disclosed in which a lower operating shaft and an upper operating shaft having a round handle for steering a front wheel attached to an upper end are connected via a universal joint having a tilt fulcrum so that the front / rear tilt angle can be changed. And in patent document 1, several recessed part is formed in the upper outer periphery of the fixed cam fixed to the lower end of the cylinder (column) by which the upper operation shaft was rotatably built, and was fixed to the tilt fulcrum vicinity. . On the other hand, the tilt lock lever provided on the inner surface of the bonnet standing upright at the front of the traveling machine body so as to be vertically rotatable is biased downward by a spring, and the plurality of protrusions projecting downward on the tilt lock lever are the plurality of protrusions. It is possible to selectively fit into one of the recesses, and to thereby maintain a posture in which the forward tilt angle of the cylinder is appropriately changed. In addition, a long hole is formed in the bonnet in the front-rear direction of the traveling machine body through which the cylinder can pass. The tilt lock lever protrudes rearward to approach the operator who rides on the traveling machine body.

In Patent Document 2, an engine and a mission case are mounted at a position closer to the rear part of the traveling machine body of the lawn mower, and a tilt handle is provided at the front part of the traveling machine body. In that case, the upper steering shaft protrudes upward from the upper end of the lower steering post erected from the traveling machine body via the tilt mechanism, and the outer periphery of the lower steering post and the like is covered by the cover body. And the lower end of the cover of the flexible bellows structure which covers the outer periphery of an upper steering shaft is fixed to the upper end of the said cover body. Further, the operation lever for changing the angle at which the upper steering shaft tilts in the front-rear direction via the tilt shaft and maintaining the posture thereof is pivotally supported by a lever shaft provided on the side surface of the lower steering post with its front end, The operation lever extends to the rear of the traveling machine body and is configured to be rotatable up and down.
Japanese Patent Publication No. 2574680 (refer to FIGS. 1, 4 and 5) JP-A-6-247316 (see FIGS. 1, 2 and 6)

  However, according to the configurations of Patent Documents 1 and 2, since the operator descending on the ground is positioned in front of the traveling machine body and executes the traveling and steering operations, the operator locks the tilt lock lever while riding on the traveling machine body. It is necessary to tilt the column (upper steering shaft) forward so that the (control lever) is operated so that the steering handle faces forward. Further, in order to return to the original rearward tilt state, the operator must operate the tilt lock lever (operation lever) after moving to the seat side of the traveling aircraft body, and it is difficult to operate at the getting-off position.

  The present invention has been made in order to solve the above-described conventional problems, and allows the operator to operate the tilt mechanism only in front of the traveling body after descending to the ground, and the forward tilt angle of the upper column is increased. However, it is an object of the present invention to provide a riding type rice transplanter that can easily perform the tilt operation and can ensure the reliability and safety of the ground operation.

In order to achieve the above object, the riding type rice transplanter according to the first aspect of the present invention is configured such that an engine or the like is disposed at the front part of the traveling machine body, and a seedling planting device is connected to the rear part of the traveling machine body so as to be movable up and down. erected under column front-wheel steering the traveling machine body front portion of the front side of the position, the column top with a handle shaft and the handle is bendable coupled in the longitudinal direction of the lower column, at least the engine and the lower the front hood surrounding the column, an opening the upper column can pass forwardly disposed, on said column and integral with the front-rear moving and the opening the upper column movable cover for covering the said front hood And a posture adjusting means for changing and maintaining the bending posture of the upper column is arranged at the connecting portion of the upper and lower columns, and the upper column is rotated by moving it forward. An operation member for posture adjusting means for changing the relative angle with respect to the column is provided, the upper column is connected to be able to bend in the front-rear direction, and the handle is selectively operated on the traveling machine body and on the front side of the traveling machine body. In the riding type rice transplanter configured as possible, an auxiliary cover body is rotatably provided on the movable cover body, and the operation member is connected to an inner surface of the auxiliary cover body.

  According to a second aspect of the present invention, in the riding type rice transplanter according to the first aspect, the auxiliary cover body is provided at a front end portion of the movable cover body.

  According to a third aspect of the present invention, in the riding type rice transplanter according to the first or second aspect, when the upper column heads in the direction of the control seat on the traveling machine body, the movable cover body and the auxiliary cover body It is formed so as to completely cover the opening.

  According to a fourth aspect of the present invention, in the riding type rice transplanter according to the first aspect, the upper column is connected to a lower bracket on the traveling machine body via a horizontal axis that is a center of tilt, and an outer peripheral surface of the lower bracket. A plurality of locking grooves at a plurality of positions are formed in the recesses, and the distance from the horizontal axis to the bottom surface of the locking grooves at the plurality of positions is set so as to increase sequentially as the upper column moves away from the control seat on the traveling body. It is what has been.

According to invention of Claim 1, an engine etc. are arrange | positioned at a traveling machine body front part, the seedling planting apparatus is connected to a traveling machine body rear part so that raising / lowering is possible, and the traveling machine body front part ahead of the arrangement position of the engine A lower column for front wheel steering is erected, an upper column having a handle shaft and a handle is connected to the lower column so as to be able to bend in the front-rear direction, and at least a front bonnet surrounding the engine and the lower column column an opening is provided which can pass through the front, movable cover member for covering the opening portion of the upper column integrally with front and rear moving and the front hood is arranged on the column, changing the bending position of the upper column And a posture adjusting means for holding is arranged at the connecting portion of the upper and lower columns, and the relative angle to the upper column is changed by the forward rotation of the upper column. A riding type rice transplanter configured to be operable to selectively operate from above the traveling machine body and from the front of the traveling machine body. In the machine, the auxiliary cover body is rotatably provided on the movable cover body, and the operation member is connected to the inner surface of the auxiliary cover body. Therefore, when an operator descending on the ground operates the traveling machine body. It becomes easy to execute an operation of tilting the upper column with the handle toward the front of the traveling body. The auxiliary cover body can be used both as a member for operating the operation unit and a function of a cover for covering a part of the front bonnet, and there is an effect that the number of parts can be reduced.

  According to the second aspect of the present invention, since the auxiliary cover body is provided at the front end of the movable cover body, the operator who has descended to the ground performs an operation of tilting the upper column forward of the traveling machine body. Since the movable cover body and the operation portion are arranged at the front portion of the traveling machine body which is closer to the time of execution, there is an effect that the tilting operation of the upper column becomes extremely easy.

  According to a third aspect of the present invention, when the upper column is directed toward the control seat on the traveling aircraft body, the movable cover body and the auxiliary cover body are formed so as to completely cover the opening of the front bonnet. Therefore, there is an effect that dust and mud do not enter the front bonnet during normal rice transplanting work.

  According to a fourth aspect of the present invention, the upper column is connected to the lower bracket on the traveling machine body via a pivot shaft that is the center of tilt, and a plurality of locking grooves are formed in the outer peripheral surface of the lower bracket. The distance from the pivot shaft to the bottom surfaces of the locking grooves at the plurality of positions is set so as to increase sequentially as the upper column moves away from the control seat on the traveling machine body. The auxiliary cover body (operation member) is engaged with the second locking groove away from the control seat than the downward angle of the auxiliary cover body (operation member) when the tip end portion of the engagement hook is engaged with the first locking groove. The auxiliary cover body (operation member) has a lower end protruding in front of the traveling machine body and is engaged with a third locking groove further away from the control seat. The lower end of the cover body (operation member) is large in front of the traveling machine body. It becomes the attitude that protrudes. In other words, even if the tilt angle of the upper column increases, the auxiliary cover body does not approach the front bonnet. As a result, the auxiliary cover body can be maintained while being separated from the front bonnet.

  Next, preferred embodiments of the present invention will be described with reference to the drawings. 1 is a side view of a riding type rice transplanter, FIG. 2 is a plan view, FIG. 3 is a perspective view showing a traveling body of the riding type rice transplanter, FIG. 4 is a side view of the front part of the traveling body, and FIGS. FIG. 9 is a front perspective view of the front bonnet, FIG. 10 is a side view showing the tilt position of the steering handle, and FIG. 11 is an opening of the front bonnet with the movable cover body and the auxiliary cover body removed. FIG. 12 is a perspective view seen from below with the movable cover body and the auxiliary cover body attached to the upper column, FIG. 13 is a perspective view showing the components arranged around the upper column, and FIG. FIG. 15 is a side view showing components arranged around the upper column, and FIG. 15 is a perspective view showing a tilt mechanism and a posture holding means.

  As shown in FIG. 1 to FIG. 3, the traveling machine body in the four-row planted rice transplanter of this embodiment includes a main frame 1 composed of a pair of left and right frames that are long in the front-rear direction, and the main frame 1. It consists of a transmission case 2 formed of an integral case body that is long in the front-rear direction and a transmission section frame 3 having a U-shaped cross section that is connected to the rear thereof.

  The mission case 2 made of aluminum alloy or the like is obtained by integrating a divided case divided into left and right sides of a traveling machine body by bolting the housing into an internal mechanism. A front axle case 4 protrudes from the left and right sides of the middle part of the transmission case 2 in the front-rear direction, and a rear axle case 5 is attached to the rear end of the transmission part frame 3. A front wheel 4a is attached to the left and right ends of the front axle case 4, and a rear wheel 5a is attached to the left and right ends of the rear axle case 5, respectively (see FIGS. 1 to 3).

  A seedling planting device 7 is connected to the rear end of the main frame 1 through a parallel link mechanism 6 composed of upper and lower links so as to be movable up and down. The seedling planting device 7 has a conventionally known structure, that is, a pair of left and right planting transmission cases 11 to which power is transmitted via a universal joint shaft 10 from a PTO shaft 9 projecting to the rear end of the mission case 2, and an upper end. Are attached to both the left and right sides of each planting transmission case 11, a seedling stage 12 that is forwardly inclined so as to approach the rear of the traveling machine body, a float 13 that is disposed on the lower surface of each planting transmission case 11, And a planting mechanism 14 with a planting claw for planting the seedling mat on the seedling platform 12 while dividing it up and down and planting it one by one. And the raising / lowering hydraulic cylinder 15 provided in the rear end of the main frame 1 is attached in connection with the parallel link mechanism 6, and can raise / lower the seedling planting apparatus 7 largely.

  A seat body 17 can be horizontally rotated on a seat support shaft (not shown) erected from the main frame 1 on a synthetic resin vehicle body cover 16 attached so as to cover the main frame 1 from above. It is attached to. In front of it, a front bonnet (engine hood) 19 is fixed and erected on the upper surface of the vehicle body cover 16.

  The transmission case 2 includes a steering drive mechanism 28 for steering in its front part, and a traveling drive system 29 and a power transmission mechanism 31 to the PTO drive system 30 in its middle part to the rear part. (See FIGS. 7 and 8). The mission case 2 is formed with a step 2a in the middle so that the height of the front part on the upper surface side is low and the height is higher from the middle part to the rear part in a side view (see FIG. 7). A foot portion of a flat engine support member 32 straddling the left and right on the upper surface of the mission case 2 is bolted to the step portion 2a on the lower side (see FIG. 6). A base portion (crankcase portion) 21a of the engine 21 is fixed to the engine support member 32, and the cylinder case 21b side of the engine 21 is inclined so as to face upward. The engine 21 may be fixed upright. Pulley belts 33a, 34a, 35, which are conventionally known belt transmission mechanisms with a slack adjusting mechanism 35a, are provided on the output shaft 33 of the engine 21 and the input shaft 34 projecting to one side surface in the longitudinal direction of the transmission case 2. To transmit power from the input shaft 34 to the power transmission mechanism 31.

  The power transmission mechanism 31 includes a main clutch 36 that turns on / off power transmission from the input shaft 34, a brake mechanism 37, a gear-type transmission mechanism 38 that changes the rotational speed, and a front axle shaft 39 with a differential mechanism 39a. An output shaft 41 as a traveling drive system from the gear-type transmission mechanism 38 to the rear wheels to which power is transmitted through the chain transmission mechanism 40, and a rear end of the transmission case 2 from the gear-type transmission mechanism 38 through the PTO clutch 42. And a PTO shaft 9 projecting rearwardly (see FIGS. 7 and 8). The chain transmission mechanism 43 that transmits power from the output shaft 41 to the rear axle case 5 is disposed on the inner diameter portion of the transmission section frame 3 (see FIGS. 1 and 4). The base portion of the horizontally long cylindrical portion 4b of the front axle case 4 is bolted to the side surface of the transmission case 2, and power is transmitted from the front axle shaft 39 disposed in the horizontally long cylindrical portion 4b to the axle of the front wheel 4a.

  A steering link mechanism 44 such as a pitman arm 44a, a connecting rod, and a tie rod for changing the steering direction of the left and right front wheels 4a is disposed below the steering drive mechanism 28 at the front of the transmission case 2 (see FIGS. 4 and 6). .

  Next, the upper column 46 can be selectively bent in the front-rear direction to a rear position where the steering handle (round handle) 24 at the upper end of the upper column 46 faces the steering seat body 17 and a position on the front side of the traveling machine body. The tilt mechanism that performs this will be described. Inside the front bonnet (engine hood) 19 made of synthetic resin (or glass fiber reinforced plastic), a fuel tank 22 is fixed on a portal frame 52 standing from the main frame 1 near the rear, and this fuel A fuel supply port cylinder that opens to the upper surface of the tank 22 faces upward from a mounting hole 19 b that is formed in the upper surface plate portion 19 a of the front bonnet 19. Then, the front bonnet 19 cannot be moved upward by pressing the upper surface plate portion 19a of the front bonnet 19 in the vicinity of the mounting hole 19b with the screw-type cap body 53 for opening and closing the fuel supply port cylinder (FIG. 11). reference).

  In the space below the fuel tank 22, a two-cycle air-cooled engine 21 and its accessories 56, such as a carburetor, a speed governor, an air muffler, a starter coiler (rope starter), a silencer, and the like are arranged. .

  A steering lower shaft 20 that is also erected from the mission case is disposed in a cylindrical lower column 45 that is fixedly erected and fixed to the front end of the upper surface of the mission case 2 located in the front part of the front bonnet 19. . An upper end of the steering lower shaft 20 and a lower end of the handle shaft 23 having a steering handle (round handle) 24 attached to the upper end are connected via a universal joint 27 so as to be bent. The handle shaft 23 is rotatably mounted in the upper column 46. Further, the upper end of the lower column 45 and the lower end of the cylindrical upper column 46 are connected via a tilt mechanism 47 so as to be able to tilt in the front-rear direction. Posture holding means 48 for holding the posture is provided (see FIGS. 4 to 6, 10, and 12 to 15).

  The tilt mechanism 47 rotates a pair of left and right lower brackets 47a fixed to the upper end of the lower column 45 and a pair of left and right upper brackets 47b fixed to the lower end of the outer periphery of the upper column 46 via a pivot shaft 47c. It is the structure connected so that movement was possible (refer FIGS. 12-14).

  The posture holding means (posture adjusting means in the claims) 48 is locked at a plurality of positions (three in the embodiment) that are recessed at positions appropriately separated from each other on the eccentric arc-shaped upper end surface of the lower bracket 47a. A groove 55 (individually indicated by reference numerals 55a, 55b and 55c), a horizontal shaft 48a pivotally supported by the rear end piece 47d of the upper bracket 47b, and one end of the horizontal shaft 48a are fixed. The upper column 46 is changed to a predetermined rearward or forward inclination angle. The engagement hook 48b and the urging spring 48c wound around the horizontal shaft 48a to urge the engagement hook 48b downward. When the engagement hook 48b selectively engages with any one of the locking grooves 55 at a plurality of positions, the tilting posture of the upper column 46 can be adjusted and held (FIG. 12). To FIG. 15). In the embodiment, as shown in FIGS. 10 and 15, the first column I in which the upper column 46 is inclined rearward (approximately 30 degrees clockwise with respect to the vertical line), and then substantially counterclockwise. The second posture II tilted forward in front of the 60 ° traveling vehicle body and the third posture III tilted largely forward in front of the traveling aircraft body by approximately 88 ° counterclockwise from the first posture I can be selected. When the upper column 46 is in the first posture I, the engagement hook 48b is fitted into the rearmost locking groove 55a of the upper surface of the lower bracket 47a. When the upper column 46 is in the second posture II, the engaging hook 48b is engaged with the locking groove 55b at the front and rear center position, and when the upper column 46 is in the third posture III, the engaging hook is engaged with the front locking groove 55c. 48b is fitted.

  On the other hand, a substantially U-shaped opening 54 in a plan view is formed in the center of the left and right sides of the front bonnet 19 from the upper surface side to the front end (see FIG. 11). The opening 54 is covered with a movable cover body 25 that moves back and forth integrally with the upper column 46 and an auxiliary cover body 26 as an exterior product connected to the movable cover body 25 so as to be rotatable upward. The movable cover body 25 and the auxiliary cover body 26 are made of synthetic resin or glass fiber reinforced plastic, like the front bonnet 19. The auxiliary cover body 26 is provided so as to be rotatable up and down around the front end side of the movable cover body 25. That is, as shown in FIGS. 11 to 14, a support pipe 57 a is fixed laterally at the tip of a support bracket member 57 that protrudes upward from the lower portion of the upper column 46. On the other hand, a pair of left and right shaft portions 58a of a reinforcing and operating member 58 fixed to the back surface of the auxiliary cover body 26 and bent in a U-shape are rotatably inserted into both ends of the support pipe 57a. .

  The operation member 58 is associated as an operation unit of the posture holding means 48. That is, as shown in FIGS. 12 to 14, the other end of the link 60 rotatably connected to the pin 58 b protruding from the shaft portion 58 a of the operation member 58 at the eccentric position is integrated with the engagement hook 48 b. It is rotatably connected to the tip of an arm 59 fixed to the other end of the horizontally rotating horizontal shaft 48a. The biasing force of the biasing spring 48 c biases the auxiliary cover body 26 and thus the lower end side of the operation member 58 so as to approach the surface of the front bonnet 19.

  Accordingly, when the auxiliary cover body 26 and thus the lower end side of the operation member 58 are rotated upward by a predetermined angle so as to be separated from the surface of the front bonnet 19, the link 60 and the arm 59 are resisted against the urging force of the urging spring 48c. Since the tip end of the engagement hook 48b is pivoted (unlocked) so as to be disengaged from the first locking groove 55a via the pin, the hand is then released from the auxiliary cover body 26 (auxiliary cover body 26). The operator can move from the first posture I to the second posture II by holding the steering handle 24 in a state where the inner surface of the lower end side is in sliding contact with the outer edge of the opening 54 of the front bonnet 19. In the second posture II, the tip end portion of the engagement hook 48b is engaged with the second locking groove 55b. Further, in order to move to the third posture III, the auxiliary cover body 26 (operation member 58) is again turned upward by a predetermined angle to release the lock, and then the steering handle 24 is tilted forward. The tip end of 48b engages with the third locking groove 55c. Thus, the upper column 46 can be largely tilted forward in a stepwise manner in front of the traveling machine body.

  In the present embodiment, as shown in FIG. 15, the locking grooves 55a and 55b at a plurality of positions (three in the embodiment) formed as recesses on the outer peripheral surface of the lower bracket 47a from the pivot shaft 47c serving as the center of tilt. 55c, the distances R1, R2, and R3 to the bottom surface are set so as to increase sequentially, so that the auxiliary cover when the tip end portion of the engagement hook 48b is engaged with the first engagement groove 55a. If the auxiliary cover body 26 (operation member 58) is engaged with the second locking groove 55b rather than the downward angle of the body 26 (operation member 58), the lower end of the auxiliary cover body 26 (operation member 58) projects forward of the traveling machine body. When it is in an attitude (position away from the opening 54 of the front bonnet 19) and engaged with the third locking groove 55c, the lower end of the auxiliary cover body 26 (operation member 58) travels. Projecting forward in front of the aircraft It becomes position (greatly apart from that posture from the opening 54 of the front hood 19).

  Therefore, when the upper column 46 is in the first posture I, the auxiliary cover body 26 is in a substantially vertical posture on the front end side of the opening 54 of the front bonnet 19 as shown by the solid line in FIG. In the side view of the machine, the axis of the upper column 46 and the back surface of the auxiliary cover body 26 are substantially parallel, and the lower end of the auxiliary cover body 26 is greatly separated from the steering handle 24.

  In the state of the second posture II (see the solid line state in FIG. 10), the included angle between the axis of the upper column 46 and the back surface of the auxiliary cover body 26 is narrowed to about 160 degrees, and the auxiliary cover with respect to the steering handle 24. The lower end of the body 26 is closer to the first posture I than the first posture I. In other words, for an operator whose depression angle with respect to the back surface of the auxiliary cover body 26 (operation member 58) is about 48 degrees and whose lower end is located in front of the traveling machine body. It will be in a state of approaching.

  In the third posture III (see the two-dot chain line state in FIG. 10) in which the steering handle 24 is tilted so as to be positioned forward of the front end of the traveling machine body, the axis of the upper column 46 and the back surface of the auxiliary cover body 26 The included angle is narrowed to about 80 degrees, and the lower end of the auxiliary cover body 26 is closer to the steering handle 24 than the state of the second posture II. In other words, the auxiliary cover body 26 The depression angle of the back surface of the (operation member 58) with respect to the vertical is about 90 degrees, and the lower end of the auxiliary cover body 26 (operation member 58) protrudes in a substantially horizontal shape in front of the traveling machine body, and becomes closer to the operator. .

  Therefore, when the operator is located on the ground in front of the traveling machine body and performs the dismounting work, the operator's hand can be more easily reached by the auxiliary cover body 26 when the upper column 46 is tilted forward.

  Note that the operation of tilting the upper column 46 forward is possible only when the operator is positioned on the ground in front of the traveling machine body. In other words, the operator is tilted when the operator is on the traveling machine body. Therefore, inconvenience due to erroneous operation does not occur, and the reliability and safety of ground operation can be ensured.

  The operator can steer the riding type rice transplanter while boarding the traveling machine body, and the operator who descends from the traveling machine body to the ground holds the steering handle 24 while being positioned in front of the traveling machine body. It is possible to move the rice transplanter over the field or put it on a truck.

  Furthermore, since the auxiliary cover body 26 is provided at the front end portion of the movable cover body 25, it is even easier for the operator descending on the ground to adjust the tilt while being positioned in front of the traveling machine body. When the upper column 46 is in the first posture I toward the control seat 17 on the traveling machine body, the movable cover body 25 and the auxiliary cover body 26 are formed so as to completely cover the opening 54 of the front bonnet 19. Therefore, air resistance during traveling can be reduced, and rain and dust do not enter the front bonnet 19.

  The exterior product to which the operation member 58 is attached is replaced with the auxiliary cover body 26, and the manufacturer mark body, the manufacturer symbol body, the headlight, and the left and right sides of the traveling machine body mounted on the surface side of the front end portion of the movable cover body 25. A marker or the like that indicates the center and serves as a marker for linear running during rice planting work, and these exterior items may be movable. Further, the auxiliary cover body 26 may be omitted, and the operation member 58 may be directly attached to the front outer surface of the movable cover body 25.

  On one side of the upper column 46 (on the left side of the machine body as viewed from the operator sitting on the seat body 17 in the embodiment), the main clutch lever 49 of the traveling system and the gear type speed change mechanism 38 of the transmission case 2 are moved forward two stages and neutral stages. A main transmission lever 50 for switching to the first reverse gear is disposed, and a hydraulic cylinder 15 for raising and lowering the seedling planting device 7 is provided on the other side of the upper column 46 (also in the embodiment, on the right side of the machine body). The lift operation lever 51 to be driven is arranged, and these levers 49 to 51 are provided in association with the upper column 46 so that the posture can be changed in the front-rear direction. That is, the bases of the levers 49 to 51 are attached to a bracket 61 provided near the outer periphery of the upper column 46 in a side view. Corresponding levers 49 to 51 are connected to wire operating means 62, 63, and 64 each composed of a flexible outer guide tube and inner wire (see FIGS. 12 to 14). The operation unit on the mission case 2 side is not shown. And the front-end | tip part (operator's grip part) side of each lever 49-51 is located in the outer surface of the movable cover body 25. FIG.

  An engine stop switch 65 for emergency stop of the engine 21 is also provided in association with the upper column 46 so as to move back and forth integrally with the upper column 46. As one embodiment thereof, on one side outer surface (in the embodiment, the right side of the machine body as viewed from the operator sitting on the seat body 17) along the front-rear movement direction of the movable cover body 25 that moves integrally with the upper column 46, An engine stop switch 65 is provided, and the push button 65a is provided so as to protrude (expose) the outer surface of the movable cover body 25 (see FIGS. 9, 10 and 12). By pushing or hitting the push button 65a, the electric system related to the engine 21 is cut and the engine 21 can be stopped quickly.

  With this configuration, the engine stop switch 65 can be operated both when the operator is on the traveling machine body and when the operator descending from the traveling machine body is standing in front of the riding rice transplanter. The type rice transplanter can be operated safely (see FIG. 10).

  A push button 65a is provided on one side outer surface (in the embodiment, the right side) of both side outer surfaces along the front-rear movement direction of the movable cover body 25 with the upper column 46 interposed therebetween, and the other side outer surface (in the embodiment, By providing the main clutch lever 49 on the left side), the operator can stop running and stop the engine without hesitation.

It is a side view of the riding type rice transplanter according to the present invention. It is a top view of a riding type rice transplanter. It is a perspective view which shows the whole structure of a traveling body. It is a side view which shows the structure of the front part of a traveling body. It is the perspective view seen from the front left of the traveling body with the transmission case, the engine, and the handle attached. It is a perspective view which shows the attachment state of a mission case, an engine, a front axle case, and a steering mechanism. It is a side view which shows the internal mechanism of a mission case. It is a top view which shows the internal mechanism of a mission case. It is a front perspective view of a front bonnet. It is a side view which shows the position of the tilt of a steering handle. It is a perspective view which shows the opening part of the front bonnet of the state which removed the movable cover body and the auxiliary cover body. It is the perspective view seen from the bottom of the state where the movable cover body and the auxiliary cover body were attached to the upper column. It is a perspective view which shows the components arrange | positioned around the upper column. It is a side view which shows the components arrange | positioned around the upper column. It is a top view which shows a tilt mechanism and an attitude | position holding means.

DESCRIPTION OF SYMBOLS 1 Main frame 2 Mission case 2a Step part 4 Front axle case 5 Rear axle case 7 Seedling planting device 9 PTO shaft 16 Body cover 19 Front bonnet 20 Steering lower shaft 21 Engine 23 Handle shaft 24 Steering handle 25 Movable cover body 26 Auxiliary cover body 45 Lower column 46 Upper column 47 Tilt mechanism 48 Posture holding means (posture adjustment means)
48a Horizontal shaft 48b Engagement hook 48c Biasing spring 55 Locking groove 57 Support bracket member 57a Support pipe 58 Operation member 58a Shaft portion 58b Pin 59 Arm 60 Link

Claims (4)

An engine or the like is arranged at the front part of the traveling machine body, a seedling planting device is connected to the rear part of the traveling machine body so that it can be moved up and down, and a lower column for front wheel steering is erected at the front part of the traveling machine body ahead of the engine placement position. An upper column having a handle shaft and a handle is connected to the lower column so as to be bent in the front-rear direction, and at least a front bonnet surrounding the engine and the lower column is provided with an opening through which the upper column can pass forward , movable cover member for covering the opening portion of the upper column integrally with front and rear moving and the front hood is arranged on the column, the attitude adjusting means for changing and retaining a bent posture of the upper column vertical An operation member for the posture adjusting means is provided which is arranged at the connecting portion of the column and changes the relative angle with respect to the upper column by rotating the upper column forward. , And linked to bend the upper column in the longitudinal direction, in the riding-type rice planting machine operably configured to selectively the handle from the front of the upper traveling machine body and the vehicle body,
A riding type rice transplanter characterized in that an auxiliary cover body is rotatably provided on the movable cover body, and the operation member is connected to the inner surface of the auxiliary cover body.   The riding type rice transplanter according to claim 1, wherein the auxiliary cover body is provided at a front end portion of the movable cover body.   The said upper column is formed so that the said opening part may be covered completely by the said movable cover body and an auxiliary | assistant cover body when it goes to the control seat direction on a traveling body. Ride type rice transplanter as described.   The upper column is connected to the lower bracket on the traveling machine body via a pivot shaft that is the center of tilt, and a plurality of locking grooves are formed in the outer peripheral surface of the lower bracket so that the plurality of positions are engaged from the pivot shaft. 2. The riding type rice transplanter according to claim 1, wherein the distance to the bottom surface of the stop groove is set so as to gradually increase as the upper column moves away from the control seat on the traveling machine body.

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