JP2014233210A - Sulky transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an unintended spacing gear change.SOLUTION: When arranging a spacing gear change lever 35 having an opening 44b at a floor step 44 of a drive part 41 and protruding from the opening 44b at its tip side, the spacing gear change lever 35 comprises a lever pivot arm 45 which forms a base end side of the lever, and can freely oscillate, an operation lever 46 which is slidably supported to a lever telescopic direction by the lever pivot arm 45, and a spring 47 which energizes the operation lever 46 to a contraction direction. At a normal time, an oscillation operation of the spacing gear change lever 35 is regulated by the engagement of an engagement pin 49 arranged at the operation lever 46 with a detent groove 50a of a regulation guide 50 arranged at a fixed side, and when the operation lever 46 is slide-operated in an elongation direction while withstanding an energization force of the spring 47, the engagement pin 49 is released from the detent groove 50a of the regulation guide 50, and the oscillation operation of the spacing gear change lever 35 is permitted.

Description

  The present invention relates to a riding-type transplanter such as a riding-type rice transplanter equipped with an inter-strain shifting mechanism.

  In general, a riding type transplanter such as a riding type rice transplanter includes an inter-strain shifting mechanism that shifts a relative operation speed of the planting mechanism with respect to the vehicle speed (see, for example, Patent Documents 1 and 2). The inter-company transmission mechanism is connected to the inter-company transmission lever via the inter-company transmission operation mechanism, and is shifted according to the swing operation of the inter-company transmission lever. For example, in the riding type transplanter shown in Patent Document 1, the cover body (floor step) of the operating unit has an opening, and the inter-strain shift lever is arranged so that the tip side protrudes from the opening.

JP 2006-230243 A Japanese Patent Laid-Open No. 2001-224211

  However, when a stock shift lever is arranged as in Patent Document 1, there is a possibility that a foot hits the stock shift lever when the operator moves. At this time, if the inter-stock shift lever swings, there is a possibility that the stock will be switched unexpectedly or that the shift will be lost (neutral state).

  In addition, as in Patent Document 2, it is possible to dispose the stock shift lever so that it does not protrude from the opening, or to cover the opening with a floor mat, but in this way, the operability of the stock shift lever is improved. In addition to the reduction, there is a problem that it is difficult to visually confirm the shift position of the inter-stock shift lever during driving.

The present invention has been created in order to solve these problems in view of the above circumstances, and includes a planting mechanism for scraping seedlings from a seedling stand and transplanting the seedlings on a field, and the planting for vehicle speed. A stock shift mechanism for shifting the relative operating speed of the attachment mechanism, a stock shift operation mechanism for shifting the stock shift mechanism in response to a swing operation of the stock shift lever, a driver seat, a steering handle, and the stock shift lever In the riding transplanter in which the inter-strain shift lever is disposed on the floor of the driving unit, the cover body provided on the floor of the driving unit has an opening, and the opening When the inter-stock shift lever is arranged so that the tip side protrudes from the section, the inter-stock shift lever includes a swingable lever fulcrum arm that forms the base side thereof, and a lever expansion / contraction by the lever fulcrum arm. An operation lever that is slidably supported in the direction and an elastic member that urges the operation lever in the reduction direction, and in a normal state, an engagement portion provided on the operation lever is provided on a fixed side. By engaging the groove portion, the swing operation of the inter-stock shift lever is restricted, and when the operation lever is slid in the extending direction against the urging force of the elastic member, the engagement portion is By swinging out of the groove portion of the regulation guide, the swing operation of the inter-stock shift lever is allowed.
The operation lever may have an inverted L shape.
Further, when the inter-stock shift lever is disposed in front of and below the driver seat provided in the driving section, the operation lever is disposed in an inverted L shape so that the tip side faces the front of the body. To do.
Further, the engaging portion and the restriction guide are arranged inward of the opening.

According to the first aspect of the present invention, the operator moves while the cover body provided on the floor portion of the operating portion has an opening, and the inter-stock shift lever is disposed so that the front end side protrudes from the opening. Even if a foot hits the inter-company shift lever at this time, since the swing of the inter-company shift lever is restricted, an unexpected inter-company shift can be prevented. In addition, when performing inter-company shift, the swing control of the inter-company shift lever is released simply by sliding the operation lever provided on the inter-company shift lever in the extending direction, which makes the operation during inter-company shift complicated. Nor.
According to the second aspect of the present invention, since the operating lever has an inverted L shape, the operating lever can be easily pulled (swing restriction releasing operation) by hooking a finger on the tip of the operating lever. Can do.
Further, according to the invention of claim 3, when the inter-stock shift lever is arranged in the front lower part of the driver seat provided in the driver, the operation lever is formed in an inverted L shape so that the tip side faces the front of the body. Further, not only can the operation lever be pulled easily from the driver's seat side, but also the possibility that the foot is caught on the tip side of the operation lever when the operator moves can be reduced.
According to the invention of claim 4, since the engaging portion and the regulating guide are arranged inside the opening portion, there is no inconvenience that the foot is caught by the engaging portion and the regulating guide when the operator moves.

It is the whole left side view of a riding type rice transplanter. It is a whole top view of a riding type rice transplanter. It is a power transmission diagram of a riding type rice transplanter. It is a plane development view of a transmission case. It is a side view of a transmission case. It is a front perspective view of a transmission case. It is a rear perspective view of a transmission case. (A) is a principal part side view which shows the arrangement | positioning state of an inter-stock transmission lever, (b) is a principal part back perspective view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3, reference numeral 1 denotes a traveling machine body of a riding type rice transplanter (passenger type transplanting machine), which includes an engine 2 mounted on a front portion of the body and a transmission case that changes engine power. 3, a pair of left and right front wheels 5 supported by a front axle case (not shown), and a pair of left and right rear wheels 7 supported by a rear axle case 6. Engine power is input to the transmission case 3 via a hydraulic stepless transmission mechanism 8 that is a main transmission mechanism, and the power shifted here is output to the front axle case, the rear axle case 6 and the planted PTO shaft 9. The

  A planting work part 11 is connected to the rear part of the traveling machine body 1 via a lifting link mechanism 10. The planting work part 11 includes a work part frame 12 that is connected to the lifting link mechanism 10 so as to be able to roll, a seedling stage 13 provided on the work part frame 12 so as to be able to reciprocate left and right, and left and right parts of the work part frame 12. An input case (not shown) attached to the intermediate part, a plurality of planting transmission cases 14 extending rearward from the working unit frame 12, and a planting mechanism 15 provided at the rear end of the planting transmission case 14 The float 16 is provided below the planting transmission case 14 so as to be swingable up and down.

  The input case receives planting power output from the planting PTO shaft 9 of the transmission case 3, and transmits this planting power to each planting transmission case 14 via the planting transmission shaft 17. Further, the planting power transmitted to the planting transmission case 14 is transmitted to the planting mechanism 15 via the chain transmission mechanism 18 in the planting transmission case 14.

  The planting mechanism 15 includes a rotating case 19 that rotates with planting power, and a pair of planting claw support cases 20 provided at both ends thereof. The posture of the planting claw support case 20 is controlled by a gear train housed in the rotary case 19 so that the planting claw 21 provided at the tip portion draws a predetermined locus. That is, when the rotating case 19 rotates, the planting claw 21 scrapes off the seedling from the lower end of the seedling stage 13 and then reaches the planting position in the soil while drawing an arc that swells forward, and then linearly It is configured to draw a half-moon-like stationary trajectory that rises (tip motion trajectory when traveling is stopped). Thereby, planting is performed twice each time the rotating case 19 makes one rotation. The planting operation speed of the planting mechanism 15 is linked to the vehicle speed, and the planting stock of the planting mechanism 15 is adjusted by changing the planting operation speed relative to the vehicle speed.

  As shown in FIGS. 3 and 4, the transmission case 3 includes an input shaft 22 that inputs power from the continuously variable transmission mechanism 8, and power of the input shaft 22 through the auxiliary transmission mechanism 23 and a front wheel power output shaft 24 and a rear wheel. The traveling power transmission path 26 that transmits to the wheel power output shaft 25 and the power of the input shaft 22 through the strain transmission mechanism 27, the torque limiter 28, the planting clutch mechanism 29, and the inconstant speed conversion mechanism 30 are planted PTO shafts 9. And a planting power transmission path 31 that is transmitted to the vehicle.

  The inter-company transmission mechanism 27 is a transmission mechanism that changes the relative operating speed of the planting mechanism 15 with respect to the vehicle speed, and includes an inter-company transmission gear 33 that is spline-fitted to the inter-company transmission shaft 32. The meshing of gears is switched in response to this, and the planting power is changed stepwise. The torque limiter 28 automatically turns on / off the planting power according to the load of the planting mechanism 15, and the planting clutch mechanism 29 performs the planting power according to the operation of the planting clutch operation (not shown). Turn on / off. Further, the non-uniform speed conversion mechanism 30 changes the planting operation speed in one cycle without changing the planting cycle of the planting mechanism 15.

  The inter-company transmission gear 33 of the inter-company transmission mechanism 27 is connected to the inter-company transmission lever 35 via the inter-company transmission operation mechanism 34, and slides according to the swing operation of the inter-company transmission lever 35 to change the planting power. The inter-strain shifting operation mechanism 34 of the present embodiment includes a slidable shifter shaft 36 that penetrates the transmission case 3 in the left-right direction, and a shifter 37 that is integrally provided at one end of the shifter shaft 36 (inside the transmission case 3). The shifter 37 is engaged with the inter-stock transmission gear 33.

  The outer surface of the transmission case 3 is provided with a convex portion 3a that rotatably supports the swing support shaft 38 of the inter-company transmission lever 35, and the swing support shaft that is supported by penetrating in the front-rear direction. The inter-stock shift lever 35 is swung in the left-right direction using 38 as a swing fulcrum. A pin 39 protruding rearward is provided at the lower end of the inter-stock transmission lever 35, and this pin 39 is engaged with an engagement groove 36a formed at the other end of the shifter shaft 36 (outside of the transmission case 3). Match. As a result, the shifter shaft 36 slides in response to the left-right swing operation of the inter-company transmission lever 35, and the inter-company transmission gear 33 is subjected to a speed change operation.

  As shown in FIGS. 1 and 2, the traveling machine body 1 includes a driving unit 41 on which an operator rides behind an engine mounting unit 40 on which the engine 2 is mounted. The driving unit 41 includes various operation tools such as a driving seat 42 and a steering handle 43, and a floor step 44 (cover body) that forms a floor portion of the driving unit 41 at the front and lower side of the driving seat 42. ) Is provided.

  The floor step 44 has an upright portion 44a that is one step higher at the front end, and an opening 44b is formed on the upper surface thereof. The inter-stock shift lever 35 is arranged so that the tip side protrudes from the opening 44b of the floor step 44, and is operated from the driver seat 42 side, and the operation position can be easily visually recognized from the driver seat 42 side. When the inter-stock shift lever 35 is arranged in this manner, when the operator moves, the foot strikes and the inter-stock shift lever 35 swings, and the stock is switched unexpectedly or the shift is lost (neutral state). There is a fear. Hereinafter, a specific configuration for solving such a problem will be described with reference to FIGS.

  As shown in FIGS. 5 to 8, an inter-stock shift lever 35 according to the embodiment of the present invention is a swingable lever fulcrum arm 45 that forms the base side thereof, and slides in the lever expansion / contraction direction by the lever fulcrum arm 45. An operation lever 46 that is freely supported, and a spring 47 (elastic member) that urges the operation lever 46 in the reduction direction are configured. The lever fulcrum arm 45 is integrally connected to the swing support shaft 38 at an intermediate position in the vertical direction, and is integrally provided with the pin 39 at the lower end. Further, a cylindrical member 48 along the length direction is integrally provided at the upper end portion of the lever fulcrum arm 45, and the base end side of the operation lever 46 is slidably supported by the cylindrical member 48.

  An engagement pin 49 that penetrates in the front-rear direction is provided at the lower end of the operation lever 46. The engagement pin 49 is inserted into a long hole 45a formed in the lever fulcrum arm 45 along the arm direction, and allows the operation lever 46 to slide within the stroke range of the long hole 45a. A spring 47 made of a compression coil spring is mounted on the lower end side of the operation lever 46 in a state of being sandwiched between the cylindrical member 48 and the engagement pin 49, and the operation lever 46 is moved by the urging force of the spring 47. Energized in the direction of reduction.

  At the front overlapping position of the lever fulcrum arm 45, a plate-shaped regulation guide 50 fixed to the convex portion 3a of the transmission case 3 is provided. The upper end portion of the regulation guide 50 has an arc shape with the swing support shaft 38 as the center, and a plurality of detent grooves 50a (groove portions) are formed at predetermined intervals in the circumferential direction.

  In a state in which the stock shift lever 35 is operated to any stock shift position, the engagement pin 49 of the operation lever 46 protruding forward through the long hole 45a of the lever fulcrum arm 45 is connected to any detent groove 50a. Can be selectively engaged, and the engaged state is maintained by the urging force of the spring 47. When the engagement pin 49 of the operation lever 46 is engaged with the detent groove 50a of the restriction guide 50, the swinging operation of the inter-company transmission lever 35 is restricted. Thus, even if the operator hits the inter-company shift lever 35 when the operator moves, the swing of the inter-company shift lever 35 is restricted, so that an unexpected inter-company shift can be prevented. In the inter-stock shift operation, the operation lever 46 is slid in the extending direction against the urging force of the spring 47. As a result, the engaging pin 49 is disengaged from the detent groove 50a of the restriction guide 50, and the swing operation of the inter-stock transmission lever 35 is allowed.

  In the present embodiment, the operation lever 46 has an inverted L shape (including an inverted J shape). In this way, the operation lever 46 can be easily pulled (oscillation restriction releasing operation) by hooking a finger on the tip of the operation lever 46. The shape of the operation lever 46 is not limited to the inverted L shape. For example, it is good also as a P-shape by which an annular finger hook is formed in the front-end | tip part.

  Further, in the present embodiment, when the inter-stock shift lever 35 is disposed in front of and below the driver seat 42 provided in the driver 41, the inverted L-shaped operation lever 46 is disposed so that the tip side faces the front of the body. Yes. In this manner, not only can the operation lever 46 be easily pulled from the driver seat 42 side, but also the possibility that the foot will be caught on the distal end side of the operation lever 46 when the operator moves can be reduced.

  In the present embodiment, the engagement pin 49 and the regulation guide 50 are arranged inside the opening 44b. In this way, it is possible to prevent the inconvenience that the operator gets caught in the engaging pin 49 or the regulation guide 50 when moving.

  According to the present embodiment configured as described, a planting mechanism 15 that scrapes seedlings from the seedling mount 13 and transplants the seedlings on the field, and an inter-strain shift that shifts the relative operating speed of the planting mechanism 15 with respect to the vehicle speed. In a riding-type rice transplanter including a mechanism 27 and a stock shifting operation mechanism 34 that shifts the stock shifting mechanism 27 according to a swing operation of a stock shifting lever 35 disposed in the driving unit 41, the floor step of the driving unit 41 When the inter-stock shift lever 35 is disposed so that the front end side protrudes from the opening 44b, the inter-stock shift lever 35 includes a swingable lever fulcrum arm 45 that forms the base side thereof, An operating lever 46 is supported by the lever fulcrum arm 45 so as to be slidable in the lever extending / contracting direction, and a spring 47 for urging the operating lever 46 in the contracting direction. The engagement pin 49 provided on the -46 is engaged with the detent groove 50a of the restriction guide 50 provided on the fixed side, so that the swinging operation of the inter-stock shift lever 35 is restricted, and the operation lever 46 is biased by the spring 47. When the sliding operation is performed in the extending direction against the movement, the engaging pin 49 is disengaged from the detent groove 50a of the regulation guide 50, so that the swinging operation of the inter-stock shift lever 35 is permitted. Even though the stock shift lever 35 is arranged so that the tip side protrudes from the portion 44b, even if the operator hits the stock shift lever 35 when moving, the swing of the stock shift lever 35 is restricted, Unintentional shift between stocks can be prevented. Further, when performing the inter- stock shift, the swing control of the inter-species shift lever 35 is released only by sliding the operating lever 46 provided in the inter-species shift lever 35 in the extending direction, so that the operation during the inter-set shift is complicated. There is no inconvenience.

  Further, since the operation lever 46 has an inverted L shape, the operation lever 46 can be easily pulled (oscillation restriction release operation) by hooking a finger on the tip of the operation lever 46.

  In addition, when the inter-stock shift lever 35 is disposed in front of and below the driver seat 42 provided in the driving unit 41, the operation lever 46 is disposed in an inverted L shape so that the tip side faces the front of the aircraft. Not only can the operation lever 46 be easily pulled from the seat 42 side, but also the possibility that the foot is caught on the distal end side of the operation lever 46 when the operator moves can be reduced.

  Further, since the engagement pin 49 and the restriction guide 50 are disposed inside the opening 44b, there is no inconvenience that the foot is caught on the engagement pin 49 or the restriction guide 50 when the operator moves.

DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Transmission case 11 Planting work part 13 Seeding stand 15 Planting mechanism 27 Inter-shaft transmission mechanism 34 Inter-shaft transmission operation mechanism 35 Inter-shaft transmission lever 38 Oscillating support shaft 41 Driving section 42 Driving seat 44 Floor step 44b Opening 45 Lever fulcrum arm 45a long hole 46 operation lever 47 spring 49 engaging pin 50 regulating guide 50a detent groove

Claims (4)

A planting mechanism for scraping seedlings from a seedling stand and transplanting them into a field;
A stock shifting mechanism that shifts a relative operation speed of the planting mechanism with respect to a vehicle speed;
A stock shifting operation mechanism for shifting the stock shifting mechanism in response to a swing operation of the stock shifting lever;
A driving seat, a steering handle, and a driving part in which the inter-stock shift lever is disposed,
In the riding type transplanter in which the inter-strain shift lever is disposed on the floor of the driving unit,
In having an opening in the cover body provided on the floor of the driving unit, and arranging the inter-stock shift lever so that the tip side protrudes from the opening,
The inter-stock shift lever is
A swingable lever fulcrum arm forming its base side,
An operation lever that is supported by the lever fulcrum arm so as to be slidable in the lever expansion and contraction direction;
An elastic member for urging the operation lever in the reduction direction,
During normal operation, the engaging portion provided on the operation lever is engaged with the groove portion of the restriction guide provided on the fixed side, so that the swing operation of the inter-stock shift lever is restricted,
When the operation lever is slid in the extending direction against the urging force of the elastic member, the engaging portion is disengaged from the groove portion of the regulation guide, so that the swing operation of the inter-segment transmission lever is permitted. Riding type transplanter characterized by that.   The riding transplanter according to claim 1, wherein the operation lever has an inverted L shape.   In disposing the inter-stock shift lever at a front lower side of a driver seat provided in the driver, the operation lever is disposed in an inverted L shape and a front end side faces the front of the body. Item 3. The riding transplanter according to Item 1 or 2.   The riding type transplanter according to any one of claims 1 to 3, wherein the engaging portion and the restriction guide are disposed inward of the opening.

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