JP5114888B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter such as a riding rice transplanter.

In the riding rice transplanter, auxiliary seedling platforms are provided on the left and right sides of the front side of the traveling vehicle body, floors that can be moved back and forth on the left and right sides of the handle post are provided, and operation levers are provided on the left and right sides of the handle post. Is known (Patent Document 1).
JP 2003-52207 A

  It is intended to eliminate as much as possible that the operation lever provided on the upper side of the handle post hinders work while moving back and forth through the floor.

In order to solve the above-mentioned problems, the invention of claim 1 is characterized in that auxiliary seedling platforms (32) are provided on the left and right sides of the front side of the traveling vehicle body (1), and seedlings are planted at the rear of the traveling vehicle body (1). A device (3) is provided so as to be movable up and down, and a floor (11) that can be moved back and forth of the traveling vehicle body (1) is provided at the left and right lower portions of the handle post (35) on the front side of the traveling vehicle body (1). On the left and right sides of the upper part of the handle post (35), the seedling planting device (3) planting / elevating lever (38) for elevating and operating lever (36) for traveling speed change are provided to be movable in the front-rear direction. The planting / elevating lever (38) includes a raising position (39u) for raising the seedling planting device (3), a stop position (39n) for stopping raising and lowering the seedling planting device (3), and a seedling planting device ( 3) The structure which operates to the planting work position (39d) which descends and performs planting work In addition, it is configured so that it can also move in the left-right direction. When the planting / elevating lever (38) is set to the planting work position (39d), it is planted more than the raised position (39u) and the stop position (39n). It is configured to be located inward in the left-right direction of the left-right operation area of the lifting lever (38), and can be switched between a forward projecting state projecting forward and a rear housing state housing rearward at the front portion of the traveling vehicle body (1). A seedling transplanter provided with a heel-crossing arm (41) and configured to move the auxiliary seedling mount (32) forward in conjunction with switching the heel-crossing arm (41) to a forward projecting state ; To do.

According to the said structure, the seedling planting apparatus (3) the planting / lifting lever (38) for raising and lowering and the operation lever (36) for traveling shifting on the upper left and right sides of the handle post (35) are operated in the front-rear direction. The seedling planting operation is performed while the traveling vehicle body (1) is traveling and the seedling planting device (3) is moved up and down. When the seedling planting device (3) is moved up and down, the planting / elevating lever (38) is set to the planting operation position (39d), and the planting / elevating lever (38) is moved upward (39u) and stopped (39n). ), The space on the floor (11) becomes wider .

According to the first aspect of the present invention, the operating lever (36) for shifting the travel is stopped, and the seedling planting device (3) is moved down the seedling planting device (3). In the planting operation state (39d), the planting / elevating lever (38) is positioned on the floor (11) so as to be located on the inner side in the left-right direction of the left-right operation area with respect to the ascending position (39u) and the stop position (39n) Therefore, the operator can work easily while going back and forth on the floor (11).
In addition , by moving the auxiliary seedling placing stand (32) forward in conjunction with switching the heel overarm (41) to the forward projecting state, seedling replenishment to the auxiliary seedling placing stand (32) at the shore is possible. It also becomes easier, and the front / rear balance of the aircraft is improved when the aircraft is over the heel, making it easier to travel over the heel.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a four-row planting rice transplanter equipped with the present invention. 1 is an overall side view, FIG. 2 is an overall plan view, and FIG. 3 is a partially omitted plan view.

  A seedling planting device 3 is connected to the rear side of the traveling vehicle body 1 by a lifting link device 2 so as to be movable up and down. The traveling vehicle body 1 has a pair of left and right front wheels 4 and 4 and rear wheels 5 and 5 as drive wheels. It is a four-wheel drive vehicle body, and the whole is configured as a passenger rice transplanter.

  A mission case 8 is attached to the front end portions of the left and right main frames 7, 7, and an engine 12 is mounted on a middle portion in the front-rear direction of the left and right main frames 7, 7 via a rubber mount. The hydraulic continuously variable transmission 20 is integrally assembled so that the power transmitted from the engine 12 is moved forward and backward and continuously variable.

  A steering shaft (not shown) projects upward from the front side of the transmission case 8, a steering handle 9 is attached to the upper end of the steering shaft, and an operation panel 10 is provided below the steering handle 9. Further, a synthetic resin floor 11 is attached above the left and right main frames 7, 7, a cockpit 13 is disposed above the engine 12, and a fertilizer device 6 is disposed behind the cockpit 13. .

  Further, as shown in FIG. 3, the left and right front axle cases 14, 14 extend from the front side of the transmission case 8 toward the left and right sides, and can be rotated around the vertical axis at the ends of the left and right front axle cases 14, 14. The left and right front wheel support cases 15 and 15 are attached to the left and right front wheel support cases 15 and 15, and the left and right front wheels 4 and 4 are suspended.

  Further, a horizontal frame 7a is connected to the rear end portions of the left and right main frames 7, 7, and the case connecting frame 16 is supported on a rolling shaft 16a provided on the horizontal frame 7a so as to be freely rollable. Wheel transmission cases 17 and 17 are attached. In addition, left and right vertical frames 7b and 7b are erected on the rear end portions of the left and right main frames 7 and 7, and the front end portions of the elevating link device 2 are supported on the left and right vertical frames 7b and 7b so as to be freely rotatable up and down. ing.

  The rotational power of the engine 12 is transmitted to the input shaft of the hydraulic continuously variable transmission 20 via the belt transmission 18, and the hydraulic continuously variable transmission 20 performs forward / reverse switching and forward / backward continuously variable transmission for output. It is transmitted to the mission case 8 via the shaft. The power transmitted to the transmission case 8 is taken out from the left and right sides of the transmission case 8 via the gear type transmission and differential mechanism in the case, and the left and right front wheel drive shafts in the left and right front axle cases 14 and 14 ( And is transmitted to the left and right front wheels 4 and 4 via a transmission gear group.

  Further, the rear wheel power passing through the differential mechanism in the transmission case 8 is taken out to the left and right rear wheel transmission shafts 19 and 19 via the left and right rear wheel side clutch mechanisms in the case, and the left and right rear wheel transmission cases 17 and 17 are obtained. It is transmitted to the left and right rear wheels 5 and 5 via the internal speed reduction mechanism. Further, working power is taken out from the front right side of the transmission case 8 to the PTO transmission shaft 21, and transmitted from the PTO transmission shaft 21 to the seedling planting device 3 and the fertilizer application device 6 through the PTO shaft 22.

  The seedling planting device 3 includes a plurality of transmission cases 25,..., A drive shaft case (not shown) that interconnects these transmission cases 25, and the transmission side in the drive shaft case (not shown). A shaft (not shown), a plurality of seedling planting tools 28 attached to the transmission case 25, and driven along a predetermined planting locus, a seedling mount 29 that reciprocates in the horizontal direction, etc. It is comprised by.

  In addition, left and right floats 30L, 30R for removing wheel marks are provided below the left and right transmission cases 25, 25 so as to be adjustable up and down, and a center float 30C is adjustable below the center of the transmission cases 25, 25. Provided. The up and down movement of the center float 30C is detected by a float sensor (not shown), and a control valve (not shown) is operated based on the detected value to adjust the raising and lowering cylinder 31 to expand and contract the seedling planting device 3 to a predetermined level. It is configured to adjust up and down to the depth.

Next, the operation lever will be described with reference to FIGS.
A steering handle 9 is supported on the handle post 35, the operation panel 10 is provided on the upper surface of the handle post 35, and the handle post 35 is covered with a handle post cover 35a. Also, left and right auxiliary seedling platforms 32, 32 are provided on the left and right sides of the front side of the traveling vehicle body 1, and the left side of the handle post cover 35a is provided with, for example, an HST lever 36 for traveling speed change that can be operated in the front-rear direction. A planting / lifting lever 38 for raising and lowering the seedling planting device 3 that can be operated in the front-rear direction is provided in the part.

  The HST lever 36 is configured to be movable along a guide groove 37 in the front-rear direction. The guide groove 37 includes a forward guide groove 37f along the front-rear direction on the inner side in the left-right direction, a reverse guide groove 37r along the front-rear direction on the outer side in the left-right direction, an inner advance guide groove 37f, and an outer reverse guide groove 37r. It is comprised by the neutral guide groove 37n along the left-right direction to connect. The base portion of the HST lever 36 is pivotally supported around the front and rear and left and right axes, and a spring 36a is attached to the base portion of the HST lever 36 so as to urge the HST lever 36 to the left and right sides. It is energized to rotate.

  The planting / elevating lever 38 is configured to be operable along the guide groove 39 in the front-rear direction. The guide groove 39 is provided with a raised position 39u of the rear seedling planting device 3, an intermediate stop position 39n, and a lowered planting position 39d of the front seedling planting device 3. Further, the base of the planting / lifting lever 38 is pivotally supported around the longitudinal and lateral axes, and a spring 38a is attached to the base of the planting / lifting lever 38 to urge the inner side in the left and right directions. The attaching / elevating lever 38 is urged so as to rotate inward and leftward and rightward.

  According to the above configuration, when the HST lever 36 is moved to the neutral position and the planting / elevating lever 38 is moved to the planting work position which is the lowered position, the levers 36 and 38 are moved to the left and right inside by the springs 36a and 38a. .

  Therefore, a wide space is formed between the levers 36 and 38 and the left and right auxiliary seedling mounts 32 and 32, and the operator can easily move back and forth through the wide floor 11 and move from the left and right auxiliary seedling mounts 32 and 32 to the rear. It is possible to supply seedlings to the seedling planting device 3 on the side.

Next, another embodiment of the fertilizer applicator 6 will be described with reference to FIG.
A cockpit 13 is provided on the engine cover 21a covering the engine 12, the exhaust port of the muffler 12b of the engine 12 is positioned on the outer periphery of the upper portion of the engine cover 12a, and the suction part of the blower 6a of the fertilizer application device 6 is connected to the engine. It faces the upper part of the cover 12a, the exhaust of the engine 12 is sucked and sent to the fertilizer 6b by the blower 6a, and the fertilizer is discharged.

According to the said structure, the exhaust_gas | exhaustion of the engine 12 is sucked and discharged by the blower 6a, the heat balance of the cockpit 13 can be improved, and the fertilizer clogging of the fertilizer application apparatus 6 can be prevented.
Next, another embodiment of the auxiliary seedling mounts 32 and 32 will be described with reference to FIG.

  The left and right auxiliary seedling platforms 32, 32 provided on the front side portion of the traveling vehicle body 1 support the lower end portions of the left and right seedling frame bodies 32a, 32a so as to be rotatable around a predetermined range around the axis direction in the left-right direction, The left and right seedling mounts 32 and 32 are attached to the upper ends of the left and right seedling frame bodies 32a and 32a so as to be movable back and forth. Further, a heel crossing arm 41 is provided at the front portion of the traveling vehicle body 1 so as to be pivotable up and down around a left and right axis, and the heel crossing arm 41 is rotated forward and downward to project forward and to the rear upper side. It is configured to be rotatable in the rotated rearward storage state. Then, the heel-crossing arm 41 is pivoted downward and pushed down to prevent the front part of the vehicle body from being lifted when the heel-crossing is over, and it is pivoted upward and rearward during normal planting work. A center mark 43 serving as a running reference is attached to the left and right intermediate part of the overarm 41.

  Further, when the middle part of the heel overarm 41 and the middle part of the left and right seedling frame bodies 32a and 32a are pin-connected by the rods 42 and 42, and the heel overarm 41 is rotated downward in the front side, the left and right auxiliary seedling support table 32 is provided. , 32 move in relation to the front, and when the heel overarm 41 is rotated rearward and upward, the left and right auxiliary seedling platforms 32, 32 are moved in relation to the rear.

  According to the above-described configuration, the left and right auxiliary seedling platforms 32 and 32 are moved forward to project forward from the front end of the traveling vehicle body 1 by rotating the heel overarm 41 downward and forward, thereby causing the left and right auxiliary seedling platforms 32 and 32 to move forward. It is easy to replenish seedlings on the auxiliary seedling platforms 32, 32, and when the saddle crossing arm 41 is pivoted forward and downward when the riding rice transplanter crosses the cage, the left and right auxiliary seedling platforms 32, 32 move forward. The front / rear balance of the fuselage is improved, making it easier to travel over the heel.

  As shown in FIG. 1, when the left and right seedling frame bodies 32a and 32a are formed in a parallel link shape by a pair of front and rear equal-length seedling frame bodies 32a and 32a, the left and right auxiliary seedling support platforms 32 and 32 are stably provided. Can move back and forth.

In addition, as shown in FIG. 7 , the front side of the left and right auxiliary seedling placing bases 32 and 32 when the left and right auxiliary seedling placing bases 32 and 32 are moved in relation to the front by rotating the heel crossing arm 41 downward and forward. The front end portion of the heel overarm 41 is positioned at a rear side by a predetermined length from the end portion.

Thus, the riding rice transplanter can be brought close to the shore, facilitating seedling replenishment, and it is safe without the operator being pinched between the aircraft and the shore.
In addition, as shown in FIG. 7, when the left and right auxiliary seedling platforms 32 and 32 are moved in relation to the front and rear in relation to the vertical rotation of the heel overarm 41, the base shaft fulcrums of the seedling frames 32a and 32a are set. Since the rotation angle to the front and rear of the seedling frame bodies 32a, 32a is equal to the vertical reference line that passes through, it is at the same height even if the left and right auxiliary seedling mounting bases 32, 32 move back and forth, It is possible to reduce the load when moving back and forth.

  Further, in relation to the up-and-down rotation of the overarm 41, in the downward rotation state, the steering handle 9 cannot be steered so that only straight travel is possible, the transmission is in the low speed shift state, and the upward rotation state. Then, the steering handle 9 may be returned to be steerable, or the transmission may be returned to the normal shift state.

  Further, as shown in FIG. 8, when the heel crossing arm 41 is configured in a reverse U-shaped loop shape when viewed from the front, the operator can easily operate the heel crossing arm 41 on either the front left or right side. It is possible to improve the operability of seedling replenishment.

  As shown in FIG. 9, when the heel crossing arm 41 is composed of left and right heel crossing arms 41L and 41R that can be bent and bent independently in a substantially L shape when viewed from the front, the left and right auxiliary seedling support platforms 32 and 32 are provided. Can be moved back and forth independently, and the operability of seedling replenishment can be improved.

Next, another embodiment of the steering handle 9 will be described with reference to FIG.
As shown in FIG. 10A, the steering handle 9 can be switched between a rear operation state in which the operator operates from the rear and a front operation state in which the operator operates from the front as shown in FIG. 10B. doing. The steering rotation of the steering handle 9 is transmitted from the handle shaft 9a and the universal joint 9b to the first transmission shaft 9c. Next, the first transmission shaft 9c is transmitted to the second transmission shaft 9f through the lower normal transmission gears 9d and 9e, and the small-diameter switching power transmission gears 9g, 9h and 9i are transferred from the first transmission shaft 9c to the lower transmission shaft 9c. Then, the deceleration power is transmitted to the second transmission shaft 9f, and is transmitted from the second transmission shaft 9f to the front wheel steering device (not shown).

  Further, the normal transmission gear 9d and the switching transmission gear 9g are rotatably fitted to the first transmission shaft 9c, and the slide key 9j is moved in the axial direction by operating the switching lever 9k. The transmission gear 9d is key-coupled to 9c, or the transmission gear 9g is key-coupled to switch to switch the transmission state.

  As shown in FIG. 10C, a wide gear 9m is attached to the second transmission shaft 9f, and power is transmitted from the first transmission shaft 9c via the normal transmission gear 9d or the switching transmission gears 9j and 9h. You may comprise so that it may transmit.

  According to the above configuration, in the forward operation state in which the operator operates from the front, the rotational movement of the steering handle 9 passes from the first transmission shaft 9c to the second transmission shaft 9f via the three switching transmission gears 9g, 9h, 9i. Therefore, the operation direction of the steering handle 9 and the steering direction of the left and right front wheels 4 and 4 can be matched, and the operability can be improved.

  In the state where the steering handle 9 is switched to the forward operation state, the first transmission shaft 9c is transmitted to the second transmission shaft 9f via the small-diameter switching transmission gears 9g, 9h, 9i. Therefore, in the forward operation state, when a delicate handle operation such as overpass or loading / unloading to / from a truck is necessary, the steering angle of the front wheels 4 and 4 can be reduced to improve safety.

  Further, when the steering handle 9 is pivoted back and forth about the first transmission shaft 9c to switch the front / rear operation position, the switching lever 9k and the slide key 9j are operated in association with this, and the steering transmission path is related. You may comprise so that it may switch. By configuring in this way, it is possible to prevent an erroneous operation when the steering handle 9 is changed back and forth.

Next, the stands 45 and 45 provided on the left and right floats 30L and 30R will be described with reference to FIGS.
A left stand 45 is attached to the frame portion 30La of the left float 30L. The left stand 45 is configured to be bent substantially in an L shape, and a shaft end portion 30Lb along the front-rear direction of the frame portion 30La is inserted into the front end portion of the left stand 45 in the front-rear direction so as to be pivotable. The stand 45 is rotated downward and protrudes downward from the ground contact surface of the float to function as a stand for supporting the seedling planting device 3 (FIG. 11B), and the stand 45 is rotated upward. A float guard state (FIG. 11A) which is located above the ground contact surface of the float and protrudes to the left side of the left side surface of the left float 39L, and the stand 45 is rotated upward from the float ground surface. Is also configured to be switchable to a planting work state (FIG. 11C) housed inside the left side of the left float 39L.

  In the stand function state in which the tip of the stand 45 is rotated downward or in the stowed state, as shown in FIG. 11B, the vertical support hole 30Lc of the shaft support portion 30Lb and the hole 45a of the stand 45 are formed. The lock pin 46 is inserted and fixed, and in the float guard state, as shown in FIG. 11C, the lock pin 46 is inserted into the left and right support holes 30Ld of the shaft support portion 30Lb and the holes 45a of the stand 45. Inserted and secured.

With this configuration, it is possible to sufficiently cope with the grounding stress of the stand 45 during the stand function or the collision load stress during the guard function of the float.
The right float 45 is similarly provided on the right float 30R.

  According to the above configuration, when the left and right stands 45, 45 are set to the stand function state, the seedling planting device 3 can be supported while the body width of the seedling planting device 3 is narrowed, and the left and right floats 30L, 30R are protected. Can fulfill the function.

Next, another embodiment of the fuel tank 51 will be described with reference to FIG.
The engine 12 is covered with an engine cover 12a, and a battery 52 is disposed above the front side of the engine 12. Further, the steering handle 9 is provided on the upper portion of the handle post 35, the operation panel 10 is provided on the upper surface of the handle post 35, and the handle post 35 is covered with a handle post cover 35a.

  A fuel tank 51 is arranged on the left and right sides near the operation panel 10 in the upper part of the handle post cover 35 a and above the carburetor 53 of the engine 12. A fuel gauge 51a is configured, and the fuel tank 51 portion of the handle post cover 35a is a cover that can be freely opened and closed.

  According to the above configuration, the large-capacity fuel tank 51 can be disposed using the wide space on the left and right sides of the handle post cover 35a, and the operator can easily reduce the remaining amount of fuel in the fuel tank 51. Can be confirmed.

Overall side view of riding rice transplanter Overall plan view of the riding rice transplanter A plan view of a part of the riding rice transplanter Front view of riding rice transplanter Plan view of the front side of the riding rice transplanter Side view of riding rice transplanter Side view of the front side of the riding rice transplanter Perspective view of arm over arm Perspective view of arm over arm Cutting side view of the steering handle Float side view, top view Perspective view of stand Side view of riding rice transplanter

DESCRIPTION OF SYMBOLS 1 Traveling vehicle body 3 Seedling planting device 11 Floor 35 Handle post 36 Operating lever for traveling speed change (HST lever)
38 Planting / lifting lever

Claims (1)

Auxiliary seedling platforms (32) are provided on the left and right sides of the front side of the traveling vehicle body (1), and a seedling planting device (3) is provided at the rear of the traveling vehicle body (1) so as to be movable up and down. A floor (11) is provided on the lower left and right sides of the handle post (35) on the front side of the vehicle so that the vehicle body (1) can be moved back and forth, and the seedling planting is provided on the upper left and right sides of the handle post (35). Attaching device (3) A raising / lowering lever (38) for raising and lowering and an operation lever (36) for shifting gear are provided to be movable in the front-rear direction, and the planting / elevating lever (38) is a seedling planting device ( 3) A raising position (39u) for raising, a stop position (39n) for stopping raising and lowering of the seedling planting device (3), and a planting work position for lowering the seedling planting device (3) to perform planting work ( 39d) and can be moved left and right When the planting / elevating lever (38) is set to the planting work position (39d), the left / right direction of the operation area of the planting / elevating lever (38) is higher than the ascending position (39u) and the stop position (39n). It is configured to be located on the inside, and the front part of the traveling vehicle body (1) is provided with a heel overarm (41) that can be switched between a forward protruding state protruding forward and a rear storage state stored rearward. 41) A seedling transplanting machine characterized in that the auxiliary seedling placing stand (32) is moved forward in conjunction with switching the front projecting state to 41) .

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