JP2006246761A - Riding type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a riding type rice transplanter that makes an emergency stop both in getting on and off. <P>SOLUTION: The riding type rice transplanter has a constitution that an upper column 46 equipped with a handle shaft and a handle 24 for a steering is bendably in the longitudinal direction of a traveling machine body connected to a lower column and the riding type rice transplanter is selectively operated from on the traveling machine body and the front of the traveling machine body. A front bonnet 19 enclosing at least an engine is equipped with an opening part with which the upper column 46 passes ahead and a switch 65 for engine stopping is provided on a side face along the movement direction of a movable cover body 25 moving longitudinally and integrally with the upper column 46. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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, a lever provided on the inner surface of a bonnet standing upright at the front of the traveling machine body so as to be vertically rotatable is biased downward by a spring, and a protrusion protruding downward on the lever is formed of the plurality of recesses. It can be selectively fitted into one, so that the forward tilt angle of the cylinder can be maintained in an appropriately changed posture. 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.

In order to enable the operator on the traveling machine body to turn on and off the main clutch of the traveling system with a pedal, and to enable the operator to turn on and off the main clutch by getting down from the traveling machine body to the ground and in front of the traveling machine body, An auxiliary lever protruding from the front side of the fuselage is connected to the pedal.
Japanese Patent Publication No. 2574680 (refer to FIGS. 1, 4 and 5)

  However, according to the configuration of Patent Document 1, it is impossible to urgently stop the engine while the operator descending on the ground is operating the traveling body, and to turn on and off the main clutch of the traveling system. Since the auxiliary lever protrudes in front of the traveling machine body, during normal traveling, the auxiliary lever also rotates in conjunction with the operation of the pedal, which causes a problem of colliding with an external article.

  The present invention has been made to solve the above-mentioned conventional problems, and it is possible to perform an emergency stop of the engine both when the operator is on the traveling machine body and when the operator goes down to the ground and operates. An object of the present invention is to provide a riding type rice transplanter capable of operating a main clutch of a traveling system.

  In order to achieve the above object, the riding type rice transplanter according to the first aspect of the present invention is a riding type in which a power unit such as an engine 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. In the rice transplanter, an upper column having a steering shaft and a steering wheel for steering the front wheels is connected to the front part of the traveling machine body in front of the engine arrangement position so as to be bent in the front-rear direction of the traveling machine body. The front bonnet that surrounds at least the engine is provided with an opening through which the upper column can pass forward, while the front column is integrated with the upper column. In order to move, an engine stop switch is provided in association with the upper column.

  According to a second aspect of the present invention, in the riding type rice transplanter according to the first aspect, the main clutch lever of the traveling system is provided in association with the upper column so as to move back and forth integrally with the upper column. Is.

  According to a third aspect of the present invention, in the riding type rice transplanter according to the first or second aspect, the upper column is provided with a movable cover body that covers at least a part of the opening in the front bonnet, and the movable column A push button for the engine stop switch is provided on one outer surface along the front-rear movement direction of the cover body.

  According to a fourth aspect of the present invention, in the riding type rice transplanter according to the third aspect, the push button is placed on one outer surface of both outer surfaces along the longitudinal movement direction of the movable cover body with the upper column interposed therebetween. And the main clutch lever is provided on the outer surface of the other side.

  According to the first aspect of the present invention, an upper column having a steering wheel shaft and a steering wheel for steering the front wheels on the front side of the position where the engine is disposed can be bent in the front-rear direction of the traveling body. The front bonnet that surrounds the engine is provided with an opening through which the upper column can pass forward, while the upper hood surrounds the engine. Since the engine stop switch is provided in association with the upper column so as to move back and forth integrally with the column, when carrying out farming work with the upper column facing the side closer to the seat of the traveling machine body In any case where an operation for running the traveling machine body in a posture facing the front of the traveling machine body is performed, an engine stop switch is provided at a place where the operator can reach, so an emergency stop is required. There is an effect that is easy to.

  According to the second aspect of the present invention, the main clutch lever of the traveling system is similarly configured to perform the farm work in a posture in which the upper column faces the side closer to the seat of the traveling aircraft body and in a posture facing the front of the traveling aircraft body. In any case where the operation for running the traveling machine body is performed, the operator can reach it, so that the traveling operation is easy and the main clutch lever of the traveling system protrudes forward of the traveling machine body as in the past. Therefore, there is no inconvenience such as catching on other things.

  According to the third aspect of the present invention, since the engine stop switch is provided on the movable cover body whose position operator posture is changed integrally with the movement of the upper column, it is easy for the operator to reach during any of the above operations. Thus, the emergency stop operation can be performed with certainty.

  According to a fourth aspect of the present invention, the push button is provided on one outer surface of both outer surfaces along the front-rear movement direction of the movable cover body across the upper column, and the main clutch lever is disposed on the other outer surface. Therefore, there is an effect that the operator can stop running and stop the engine without losing the operation position.

  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 part 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 right and left 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 48 includes a plurality of (three in the embodiment) locking grooves 55 that are formed in recesses in the arcuate upper end surface of the one lower bracket 47a at appropriate positions in the front-rear direction, and the upper bracket 47b. A horizontal shaft 48a pivotally supported on the rear end piece 47d, an engagement hook 48b fixed to one end of the horizontal shaft 48a, and an engagement hook 48b wound downward on the horizontal shaft 48a. When the upper column 46 is changed to a predetermined rearward tilt or forward tilt angle, the engagement hook 48b is selected as any one of the locking grooves 55 at a plurality of positions. Thus, the tilting posture of the upper column 46 can be maintained (FIGS. 12 to 15). In the embodiment, as shown in FIG. 10, the first column I in which the upper column 46 is inclined rearward (approximately 30 degrees clockwise relative to the vertical line) and then travels approximately 60 degrees counterclockwise. The second posture II can be selected from the second posture II tilted forward in front of the vehicle body, and the third posture III can be largely tilted forward from the first posture I in the counterclockwise direction by approximately 88 degrees to the front of the vehicle body.

  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 by a movable cover body 25 that moves back and forth integrally with the upper column 46 and an auxiliary cover body 26 that is 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 also used as the 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 urging force of the urging spring 48 c urges the auxiliary cover body 26 and thus the lower end side of the operation member 58 in a direction approaching the surface of the front bonnet 19.

  In the present embodiment, as shown in FIG. 15, the bottom surface of the locking groove 55 at a plurality of positions (three in the embodiment) formed in the outer peripheral surface of the lower bracket 47 a from the horizontal axis 48 a serving as the center of tilt. Since the distance up to is set so as to increase sequentially, the auxiliary cover body when the tip end portion of the engagement hook 48b is engaged with the first locking groove 55 (position near the rear portion of the traveling machine body). When the auxiliary cover body 26 (operation member 58) is engaged with the second locking groove 55 at the center in the front-rear direction than the downward angle 26 (operation member 58), the lower end of the auxiliary cover body 26 (operation member 58) Auxiliary cover body when it is in a posture that protrudes forward (a posture that is separated from the opening 54 of the front bonnet 19) and is engaged with the third locking groove 55 at a position closer to the front of the traveling machine body 26 (operation member 58), the lower end is a traveling machine. Would posture to increase the protrusion of the forward (larger apart from that posture from the opening 54 of the front hood 19) (see FIG. 10).

  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 a side view, 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 (see FIG. 10).

  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 of the engagement hook 48b is pivoted (unlocked) so as to be disengaged from the locking groove 55, the operator removes his / her hand from the auxiliary cover body 26 and then the operator handles the steering handle 24. Can be shifted from the first posture I to the second posture II. 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 unlock, and then the steering handle 24 is tilted forward. In this way, the upper column 46 can be largely tilted forward in a stepwise manner in front of the traveling machine body.

  Accordingly, 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.

  Note that 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 one step (on the left side of the aircraft as viewed from the operator sitting on the seat body 17 in the embodiment) A main transmission lever 50 for switching between the neutral stage and the first reverse stage is disposed, and a hydraulic cylinder for raising and lowering the seedling planting device 7 on the other side of the upper column 46 (also in the embodiment, on the right side of the machine body). 15 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 operator who has boarded the traveling machine body can also operate the engine stop switch 65 in any state where the operator who has descended from the traveling machine body to the ground stands in front of the riding type rice transplanter. The 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 traveling 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.

Explanation of symbols

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 49 Main clutch lever 65 Engine stop switch 65a Push button

Claims (4)

In a riding type rice transplanter in which a power unit such as an engine is arranged 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
An upper column having a steering wheel shaft and a steering wheel for steering the front wheels is connected to the front part of the traveling machine body so as to be bent in the front-rear direction of the traveling machine body and on the traveling machine body. The front bonnet surrounding at least the engine is provided with an opening through which the upper column can pass forward, while moving forward and backward integrally with the upper column. The riding rice transplanter is characterized in that an engine stop switch is provided in association with the upper column.   The riding type rice transplanter according to claim 1, wherein a main clutch lever of a traveling system is provided in association with the upper column so as to move back and forth integrally with the upper column. The upper column is provided with a movable cover body that covers at least a part of the opening in the front bonnet,
3. The riding type rice transplanter according to claim 1, wherein a push button for the engine stop switch is provided on an outer surface on one side of the movable cover body along a front-rear movement direction.   4. The push button is provided on one outer surface of both outer surfaces along the longitudinal movement direction of the movable cover body across the upper column, and the main clutch lever is provided on the other outer surface. Riding type rice transplanter as described in.

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