JP2009136248A - Walking-type rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a walking-type rice planter which laterally moves a seedling tray by the relative rotation and relative movement of a guide shaft to a transfer member, and which is advantageous in the aspect of the size and weight balance. <P>SOLUTION: This walking-type rice planter has one travel wheel 1, a steering handle 3 disposed behind the travel wheel 1 in the vehicle body; a seedling tray 80 disposed behind the travel wheel 1 in the vehicle body, in a state capable of being moved in the lateral direction of the vehicle body; and a seedling-planting section 8 having two seedling-planting mechanisms 6 arranged in the lateral direction of the vehicle body is such that a lateral seedling-transfer mechanism 100 is arranged and disposed in front of the seedling tray 80, behind a perpendicular line A which passes through the axle axis X of the traveling wheel 1. The outside of the outer periphery of the traveling wheel 1, thereby the lateral seedling-transferring mechanism 100 is moved in a reciprocating manner in the lateral direction of the vehicle body, by driving a guide shaft 102 disposed in the lateral direction of the vehicle body and a transfer member 101 engaged with the guide shaft 102, in a relatively rotatable and relatively slidable state so as to be relatively rotated and imparted a lateral transfer force to the seedling tray 80, to interlock the seedling tray 80 with the seedling-planting movement of the seedling-planting mechanisms 6. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes a self-propelled vehicle having one traveling wheel and a steering handle provided on the rear side of the vehicle body relative to the traveling wheel, and is positioned closer to the rear side of the vehicle body toward the upper end side on the rear side of the vehicle body than the traveling wheel. The present invention relates to a walking type rice transplanter having a seedling planting section having a seedling mount that is movable in a lateral direction of the vehicle body in an inclined posture and two seedling planting mechanisms arranged in the lateral direction of the vehicle body.

Conventionally, as the above-described walking type rice transplanter, there has been one described in Patent Document 1, for example.
In the walking type rice transplanter described in Patent Document 1, a vehicle body frame constituted by a transmission case attached to the upper surface of the engine and a pair of left and right hollow side frames extending rearward from the left and right ends of the transmission case, A traveling wheel supported by a traveling case integrally provided on the transmission case via a swing case; and a steering handle extending rearward from a seedling planting case fixed to the rear ends of the side frames. A seedling planting mechanism provided in the planting case, a guide rail mounted between the two steering handles, and a seedling platform supported by the rail mechanism so as to be movable in the lateral direction of the left and right.

In the walking type rice transplanter described in Patent Document 1, a lateral feed mechanism is disposed on the back side of the seedling platform, and the seedling platform is laterally fed by this lateral feed mechanism.
That is, the lateral feed mechanism includes a lateral feed shaft that is arranged in parallel with the moving direction of the seedling stage and a sliding boss body that is slidably fitted to the lateral feed shaft.
Both ends of the transverse feed shaft are supported by bearings attached to the upper surface of the steering handle. The sliding boss body is provided with a boat-shaped key that engages with the reciprocating screw groove of the transverse feed shaft. Engagement piece formed integrally with the sliding boss body is connected to a cylindrical receiver that is attached to the back of the seedling table, and the seeding table is reciprocated to the left and right by the rotation of the horizontal feed shaft. To do.

Japanese Patent Laid-Open No. 5-292815 (paragraphs [0005]-[0008], FIG. 1-3)

In the walking type rice transplanter described above, the seedling platform is linked to the seedling planting movement of the seedling planting mechanism by the relative rotation of the vehicle body sideways guide shaft and the transfer body engaged with the guide shaft in a relative rotation and relative sliding manner. However, when the conventional technique described in Patent Document 1 is adopted to reciprocate the vehicle body in the lateral direction, it tends to be disadvantageous in terms of the overall size or weight balance of the rice transplanter.
That is, when the above-described conventional technique is employed, the seedling lateral feed mechanism is positioned on the rear side of the vehicle body with respect to the seedling platform, and the distance from the axle center of the traveling wheel to the installation location of the seedling lateral feed mechanism is increased. As a result, the weight at the part far away from the axle core of the rice transplanter to the rear side of the vehicle body becomes large, and the balance of the front and rear weight as the whole rice transplanter tends to be deteriorated. Further, in order to improve the balance between the front and rear weights, it is necessary to increase the distance from the axle center of the installation location of the device provided on the front side of the vehicle body, and the front and rear length of the whole rice transplanter tends to be long.

  An object of the present invention is to obtain a walking type rice transplanter that is advantageous in terms of size and weight balance while laterally transferring a seedling platform by relative rotation and relative movement of a guide shaft and a transfer body. There is to do.

The first aspect of the present invention includes a self-propelled vehicle having one traveling wheel and a steering handle provided on the rear side of the vehicle body relative to the traveling wheel. In a walking type rice transplanter equipped with a seedling placing section that has a seedling mounting base that is movable in the lateral direction of the vehicle body in an inclined posture and two seedling planting mechanisms arranged in the lateral direction of the vehicle body,
By driving the vehicle body sideways guide shaft and the transfer body engaged with the guide shaft so as to be relatively rotatable and relatively slidable relative to each other, a lateral transfer force is applied to the seedling platform, A vertical line passing through the axle center of the traveling wheel on the front side of the vehicle body relative to the seedling platform, a seedling lateral feed mechanism that moves the seedling platform back and forth in the lateral direction of the vehicle body in conjunction with the seedling planting movement of the seedling planting mechanism It exists in the vehicle body rear side and arrange | positioning outside the outer periphery of the said driving | running | working wheel.

  According to the configuration of the first aspect of the present invention, the seedling lateral feed mechanism is located on the vehicle body front side of the seedling mount, and the distance from the axle center of the traveling wheel to the location where the seedling lateral feed mechanism is installed adopts the prior art. Less than that distance. Thereby, even if the distance from the axle center of the installation location of the device provided on the front side of the vehicle body is smaller than the distance when the conventional technology is adopted, the front-rear weight of the whole rice transplanter is easily balanced.

  Therefore, it is possible to obtain a high quality walking type rice transplanter that has a good balance of the front and rear weights of the whole rice transplanter and that is as short as possible in the front and rear and that is easy to control.

  In the second aspect of the invention, the traveling wheel is supported so as to be able to swing up and down, and the guide shaft is positioned on the front side of the vehicle body with respect to the rearmost end portion of the traveling wheel when the traveling wheel is in the highest position.

  According to the configuration of the second invention, even if the distance from the axle core to the installation location of the seedling lateral feed mechanism is smaller, and the distance from the axle core of the installation location of the device provided on the front side of the vehicle body is smaller, the rice transplanting The front and rear weight of the entire machine is easy to balance.

  Therefore, it is possible to obtain a high quality walking type rice transplanter that has a good balance of the front and rear weights of the whole rice transplanter and that is shorter in the front and back length and that is easier to control.

  In this 3rd invention, the transmission case which transmits motive power to the said seedling lateral feed mechanism is provided with the arrangement | positioning which overlaps with the said driving | running | working wheel by a vehicle body side view.

  According to the configuration of the third aspect of the invention, the distance from the axle center to the installation location of the transmission case is reduced, and the deterioration of the front / rear weight balance and the increase of the front / rear length due to the weight of the transmission system of the seedling lateral feed mechanism are reduced. The power can be transmitted to the seedling lateral feed mechanism while being difficult to occur.

  Therefore, it is possible to obtain a walking type rice transplanter that is less likely to deteriorate in weight balance and longitudinal length due to the transmission system of the seedling lateral feed mechanism and can be easily operated.

  In the fourth invention, a member for outputting a lateral transfer force to the seedling platform among the guide shaft and the transfer body and a connecting means for linking the seedling platform so as to be integrally movable are provided with the seedling platform. An adjusting portion is provided for adjusting a connecting position in the lateral direction of the seedling platform with respect to the output member of the table.

If a misalignment occurs in the connecting position of the seedling platform in the lateral direction with respect to the member that outputs the lateral transfer force of the seedling lateral feeding mechanism, the seedling mounting mechanism of the seedling platform that is laterally transported by the seedling lateral feeding mechanism The lateral movement range becomes inappropriate. Then, even if the seedling platform reaches the stroke end of the lateral movement, the seedling removal by the seedling planting mechanism actually does not reach one end of the seedling in the lateral direction of the seedling platform, and it is left on the lateral end side of the seedling. May occur. In addition, when the seedling platform reaches the stroke end of the lateral movement, the seedling planting mechanism acts to remove the seedling placement mechanism from the seedling on the seedling platform to the laterally outer side. May be.
On the other hand, according to the configuration of the fourth invention, the connecting position of the seedling platform in the lateral direction of the seedling platform with respect to the member that outputs the lateral transfer force of the seedling lateral feed mechanism is adjusted by the adjusting unit, The lateral movement range with respect to the seedling planting mechanism can be adjusted to be an appropriate lateral movement range. That is, when the seedling platform reaches the stroke end of the lateral movement, the seedling planting mechanism is appropriately positioned with respect to the seedlings on the seedling platform, and the seedling removal by the seedling planting mechanism does not cause the above-mentioned leftover and removal errors Can be adjusted to be done at.

  Therefore, the output member and the seedling stage are connected in a state where the connection position of the seedling stage with respect to the member that outputs the lateral transfer force of the seedling lateral feed mechanism is appropriate, and there is no accuracy in which the seedling is not left or taken out. A walk-through rice transplanter where good seedling removal is performed can be obtained.

  In the fifth aspect of the invention, the seedling stage is provided with seedling removal amount adjusting means for moving and adjusting the seedling stage in the vertical direction of the seedling stage with respect to the seedling planting mechanism, and the seedling stage of the guide shaft and the transfer body The connecting means for connecting the member for outputting a lateral transfer force and the seedling platform so as to move together integrally allows the relative movement in the vertical direction of the seedling platform with respect to the member for outputting the seedling platform. Is provided.

One of the guide shaft of the seedling horizontal feed mechanism and the transfer body is used as a seedling stage to allow the seedling stage to move in the vertical direction when the seedling quantity is adjusted by the seedling quantity adjustment means. It can also be configured to rotate relative to the other for connection with the other. In this case, if the guide shaft and the transfer body rotate relative to each other, the guide shaft and the transfer body slide relative to each other. Will occur.
On the other hand, according to the configuration of the fifth aspect of the present invention, when the seedling removal amount adjustment by the seedling removal amount adjusting means is performed, a seedling is supplied to the member that outputs the lateral transfer force of the seedling horizontal feeding mechanism by the above-mentioned flexibility. The platform moves vertically in the seedling platform. As a result, the seedling removal amount adjustment by the seedling removal amount adjusting means can be performed without the lateral movement of the seedling placing stand.

  Therefore, when the amount of seedling is adjusted by the means for adjusting the amount of seedling, the amount of seedling taken in the horizontal direction of the seedling platform does not change, and only the amount of seedling in the vertical direction of the seedling platform has changed. The amount can be adjusted.

  In the sixth aspect of the present invention, the guide shaft is connected to a member that outputs a lateral transfer force to the seedling platform among the guide shaft and the transfer body, and a connecting means that couples the seedling platform so as to be integrally movable. A connecting plate body having a size in the vertical direction of the vehicle body larger than the diameter of the vehicle body is provided, and both end sides of the connecting plate body in the lateral direction of the vehicle body are connected to the horizontal end portion of the seedling platform. In addition, the connecting plate body has an assembly posture along the outer periphery of the traveling wheel in a side view of the vehicle body.

According to the configuration of the sixth aspect of the invention, the lateral transfer force by the seedling lateral feed mechanism is distributed and transmitted to both ends of the seedling platform by the connecting plate, and the seedling platform is not easily deformed by the connecting plate. Reinforced, the seedling stage can be smoothly moved laterally.
According to the configuration of the sixth aspect of the present invention, when the mud jumps up by the traveling wheels, the mud is received by the connecting plate and hardly scattered to the seedling stage.

  Therefore, it is possible to perform seedling horizontal feeding smoothly and to perform seedling planting with a good finish in which the sizes of planted seedlings are as uniform as possible. It is possible to prevent the seedlings from being soiled with a simple structure using the connecting plate body as a scattering prevention means.

  In the seventh aspect of the invention, the guide shaft is rotationally driven, and the transfer body is moved along the guide shaft to output a lateral transfer force to the seedling platform, and is integrated with the guide shaft. A vertical feed drive arm that is rotatably provided, a vertical feed operation member that moves in conjunction with the seedling vertical feed body that is interlocked with the seedling vertical feed body provided in the seedling placement base, and the seedling placement base moves laterally When the stroke end is reached, the vertical feed operation member abuts on the vertical feed drive arm and is driven to swing by the vertical feed drive arm, thereby operating the seedling vertical feed body.

  According to the configuration of the seventh aspect of the invention, when the seedling stage reaches the stroke end of the lateral movement, the vertical feed operation member comes into contact with the vertical feed drive arm and is driven by the driving force of the horizontal feed shaft, thereby the seedling vertical feed The body is driven to feed the seedlings on the seedling stand vertically.

  Therefore, it is possible to feed the seedlings vertically with a simple structure using the transverse feed shaft as the vertical feed means.

  In the eighth aspect of the invention, the vertical feed operation member is swingably supported by the transfer body.

  According to the configuration of the eighth aspect of the invention, since the vertical feed operation member is supported by the transfer body connected to the guide shaft, the vertical feed operation member is securely held at an appropriate standby position, and the seedling platform is moved horizontally. When the talk end is reached, the vertical feed operating body can be accurately operated by the vertical feed drive arm.

  Accordingly, by adopting a simple support structure in which the vertical feed operation member is supported by the transfer body, it is possible to accurately perform the vertical feed of the seedling when the seedling platform reaches the laterally-moving slot talk end.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an overall side view of a walking type rice transplanter according to an embodiment of the present invention. FIG. 2 is an overall plan view of the walking type rice transplanter according to the embodiment of the present invention. As shown in these drawings, the walking type rice transplanter according to the present embodiment is configured to be self-propelled by one driveable traveling wheel 1 and is provided at the front end portion of the vehicle body, and the rear end portion of the vehicle body. A self-propelled vehicle having a control unit 4 equipped with a control handle 3 provided on the vehicle, and two seedling planting mechanisms 6, which are supported side by side on the vehicle body frame 5 in the vehicle body frame 5 in the vicinity of the rear part of the traveling wheel 1 6 and a seedling planting portion 8 having two grounding floats 7 and 7 supported side by side in the lateral direction of the vehicle body.

This walking type rice transplanter performs two-row seedling planting work.
That is, the traveling wheel 1 is supported by a free end portion of a wheel drive case 10 supported by the body frame 5 so as to be swingable up and down, and the wheel drive case 10 is swung by a hydraulic cylinder 11. By being operated, the vehicle body frame 5 is raised and lowered. When the traveling wheel 1 is moved up and down, the vehicle body frame 5 is moved up and down with respect to the ground, and the seedling planting unit 8 is in a descending working state in which the two grounding floats 7 and 7 are grounded on the rice field, and the grounding floating 7 Moves up and down from the rice field to the non-working state. When the self-propelled vehicle is driven with the seedling planting section 8 in the descending work state, the seedling planting section 8 is driven by the output of the engine 2 and performs seedling planting by the two seedling planting mechanisms 6 and 6.

  The self-propelled vehicle includes the traveling wheel 1, the engine 2, and the control unit 4, an engine fuel tank 12 provided above the engine 2, and the fuel tank 12 and the traveling wheel 1. A bonnet 13 that covers the upper part of the bonnet 13 and a preliminary seedling stage 14 that is located above the rear end of the bonnet 13 are provided.

  FIG. 3 is a plan view of the vehicle body frame 5. FIG. 4 is a rear view of the seedling planting mechanism arrangement portion of the vehicle body frame 5. As shown in these drawings, the vehicle body frame 5 includes a transmission case 15 that supports the engine 2, a pair of left and right vehicle body main frames 16 and 16 that extend from the transmission case 15 toward the rear of the vehicle body, and the left and right vehicles. A handle frame 17 having a front end connected to the rear ends of the pair of body main frames 16 and 16 and a lower end connected to the rear end of the left body main frame 16 of the pair of left and right body main frames 16 and 16. A vehicle body vertically-facing support frame 18, a vehicle body vertically-facing transmission case 19 having a lower end connected to a rear end portion of the right-side vehicle body main frame 16 of the pair of left and right vehicle body main frames 16, 16; A seedling support column 70 having a lower end connected to an upper end side of the support frame 18 and the transmission case 19, and the left and right seedling support platforms It is constituted by a vehicle body lateral connecting frame 20 for connecting the base to each other of the pillars 70 and 70.

  As shown in FIG. 3, the handle frame 17 includes a pair of left and right frame bodies 17a and 17a, a plate-shaped connection frame 17b connecting the front end sides of the pair of left and right frame bodies 17a and 17a, and the pair of left and right frames. And a plate-shaped connecting frame 17c that connects the rear ends of the frame main bodies 17a and 17a.

  FIG. 5 is a diagram of a transmission device that transmits the output of the engine 2 to the traveling wheel 1 and the seedling planting portion 8. FIG. 6 is a plan view of a portion of the self-propelled vehicle where the engine 2 and the mission case 15 are disposed. FIG. 7 is a side view of the front portion of the self-propelled vehicle. As shown in these drawings, the transmission case 15 includes a transmission case main body 15a connected to a left side wall portion of the lower body of the engine 2 and the lower side of the transmission case main body 15a to the right side of the vehicle body. A cylindrical traveling output case portion 15b extending through the lower side of the engine 2 and a lower portion of the transmission case main body 15a extending to the right side of the vehicle body and extending under the engine 2 in parallel with the traveling output case portion 15b. And a cylindrical planting output case portion 15c.

  The transmission case body 15a accommodates a transmission M in which a pair of input gears 21 and 21 are connected to an output shaft 2a that protrudes from the side wall of the engine 2 to the left side of the vehicle body. The transmission M includes a transmission mission unit 22 having the pair of input gears 21 and 21, a traveling clutch unit 25 that is linked to a traveling output gear 23 of the transmission transmission unit 22 via a gear 24, and the transmission transmission unit. A torque limiter unit 28 to which the driving force of the planting output gear 26 of the unit 22 is input via the gear 27, a stock transmission unit 30 in which the input shaft 31 is interlocked with the torque limiter unit 28, and this stock transmission unit The planting clutch unit 35 is transmitted from 30 output shafts 32.

  The traveling output case portion 15b accommodates one end side of the traveling output shaft 36 to which power is transmitted from the traveling clutch portion 25. The planting output case portion 15 c accommodates one end side of a planting output shaft 37 to which power is transmitted from the planting clutch unit 35. The planting output case portion 15c is positioned slightly on the vehicle body front side with respect to the traveling output case portion 15b and at a slightly lower placement height than the traveling output case portion 15b. The planting output shaft 37 and the traveling output case portion 15c The output shaft 36 is lined up in the longitudinal direction of the vehicle body in a state in which the planting output shaft 37 is positioned at a position slightly lower than the traveling output shaft 36 in front of the traveling output shaft 36.

  The wheel drive case 10 is supported on the extending end of the travel output case 15b so as to be swingable up and down. The wheel drive case 10 rotatably supports the traveling wheel 1 via an axle 1 a that protrudes leftward from the rear end of the wheel drive case 10, and is a rotary shaft-type transmission housed in the wheel drive case 10. The means 38 transmits the driving force of the traveling output shaft 36 to the traveling wheel 1 by transmitting it to the axle 1a.

  The pair of left and right vehicle body main frames 16, 16 are connected to the pair of left and right seedling planting mechanisms via a drive shaft 39 that protrudes from the rear end of the vehicle body main frame 16 to the side where the traveling wheel 1 is located (inside the vehicle body). The seedling planting mechanism 6 on the left side or the right side of 6 and 6 is supported. The pair of left and right vehicle body main frames 16, 16 transmit the driving force of the planting output shaft 37 to the drive shaft 39 of the seedling planting mechanism 6 by the rotating shaft type transmission means 40 accommodated in the vehicle body main frame 16. It is a transmission case.

  In other words, the mission case 15 shifts the driving force of the output shaft 2a of the engine 2 in two steps of high speed and low speed by the transmission mission unit 22 and distributes it for traveling and planting, and the drive distributed for traveling. The force is transmitted to the traveling wheel 1 by being transmitted to the traveling output shaft 36 via the traveling clutch portion 25 and transmitted from the traveling output shaft 36 to the wheel drive case 10. The mission case 15 transmits the driving force distributed for planting by the transmission mission unit 22 to the planting output shaft 37 via the torque limiter unit 28, the inter-strain transmission unit 30, and the planting clutch unit 35. By transmitting from the output shaft 37 to the pair of left and right vehicle body main frames 16, 16, the pair of left and right seedling planting mechanisms 6, 6 is transmitted.

  As shown in FIG. 3, the traveling wheel 1 is located on the center line CL in the left-right direction of the self-propelled vehicle in a plan view of the vehicle body. The wheel drive case 10 is biased to the right side of the vehicle body with respect to the traveling wheel 1, and the weight of the wheel drive case 10 is applied to the self-propelled vehicle on the right side of the vehicle body from the center line CL. The transmission case 15 and the transmission case 19 constitute the vehicle body frame 5 by making it easier to balance the left and right weights of the self-propelled vehicle.

  That is, the weight of the transmission case 22 in the portion where the transmission mission portion 22 is located is larger than the weight in the other portions, and the weight of the transmission case 15 is automatically adjusted in the portion where the transmission mission portion 22 is located. It can be regarded as hanging on a car. In the transmission case 15, the speed change transmission unit 22 located inside the transmission case 15 is biased to the left side of the vehicle body opposite to the side on which the wheel driving case 10 is positioned with respect to the traveling wheel 1. The vehicle body frame 5 is configured in a state where it is applied to the self-propelled vehicle on the side opposite to the side where the weight of the wheel drive case 10 and the transmission case 19 is applied to the center line CL. The transmission case 19 is biased to the right side of the vehicle body opposite to the side where the speed change transmission portion 22 of the transmission case 15 is located with respect to the traveling wheel 1, and the weight of the transmission case 19 together with the weight of the wheel drive case 10 is the center. The vehicle body frame 5 is configured in a state where it is applied to the self-propelled vehicle on the side opposite to the side where the weight of the transmission case 15 is applied to the line CL.

FIG. 8 is a cross-sectional view of the mission case 15 and the wheel drive case 10. As shown in this figure, the transmission case 15 is provided on the traveling output case portion 15b in a distributed manner on both lateral sides of the input gear 42 of the wheel drive case 10 in a direction perpendicular to the rotational axis thereof. A pair of support portions 15d and 15d are provided, and the pair of support portions 15d and 15d support both ends of the cylindrical base portion 10a of the wheel drive case 10 so as to be rotatable around the axis of the travel output shaft 36. ing. Of the pair of support portions 15d and 15d, the support portion 15d located on the opposite side of the traveling output case portion 15b from the side where the transmission case main body 15a is located is an extension of the support portion 15d and the planting output case portion 15c. It is connected to the engine 2 via a connecting portion 15e that connects the end portion, and the traveling output case portion 15b is supported by being connected to the transmission case main body 15a on the base side and connected to the engine 2 on the extending end side. It is supported by a two-sided support that is supported.
In other words, the transmission case 15 supports the wheel drive case 10 so as to be swingable up and down with both-end support in which the support portions 15d support the both ends of the base portion 10a of the wheel drive case 10.

  One support portion 15d of the pair of support portions 15d and 15d rotatably supports the base portion 10a in a state of being fitted on one end portion of the base portion 10a via a bearing body 43. The other support portion 15d of the pair of support portions 15d and 15d rotatably supports the base portion 10a in a state of being fitted to the other end portion of the base portion 10a via a bearing body 44.

  As shown in FIG. 7, the transmission case 19 is supported by an arrangement in which the lower end side of the transmission case 19 and the rear end portion of the traveling wheel 1 are overlapped in a side view of the vehicle body regardless of a change in the vertical position of the traveling wheel 1. The vehicle body frame 5 is configured in a state where the weight of the transmission case 19 is applied to the self-propelled vehicle near the traveling wheel 1.

  As shown in FIGS. 6 and 9, the self-propelled vehicle includes a hydraulic unit 48 connected to the upper portion of the mission case body 15a. The wheel lift valve 47 provided in the hydraulic unit 48 and the pair of left and right grounded floats. 7 and 7 is provided with an interlocking mechanism 60 that interlocks with the front end side, and the pair of right and left seedlings regardless of whether the traveling wheel 1 enters the cultivator recess in the field or rides on the stubbed protrusion. The seedling planting depth of the planting mechanisms 6 and 6 is maintained constant or substantially constant.

  That is, the wheel lift valve 47 moves the traveling wheel 1 up and down with respect to the vehicle body frame 5 by operating the hydraulic cylinder 11 to expand and contract and swinging and lifting the wheel drive case 10.

  FIG. 10 shows the structure of the support portion of the ground float 7 in plan view. FIG. 11 is a side view of a support structure for the grounding float 7. As shown in these drawings, the rear end sides of the pair of left and right grounding floats 7 and 7 are supported by the rear bracket 50 fixed to the upper surface side of the grounding float 7 and the main frame 17 a of the handle frame 17. The support arm 52 is rotatably supported by the support arm 52 via a connecting pin 53 that connects the rear bracket 50 to a support arm 52 that extends from a float support shaft 51 that faces the vehicle body.

As shown in FIGS. 6 and 9, the front end portions of the pair of left and right grounding floats 7 and 7 are connected to a front bracket 54 fixed to the front end portion of the grounding float, and a rear end portion is rotatably connected to the front bracket 54. It is configured to slidably engage with a long hole 55a located on the front end side of the connection link 55 via the connection link 55, and to a vehicle body sideways support shaft 56 fixed to the vehicle body main frame 16. It is supported.
That is, the pair of left and right grounding floats 7, 7 are arranged vertically with respect to the vehicle body frame 5 around the vehicle body lateral axis of the connecting pin 53 located on the rear end side of the float and near the planting location of the planting mechanism 6. When the traveling wheel 1 enters the cultivator recess, the vehicle body frame 5 descends with respect to the paddy surface, and the planting depth of the seedling planting mechanism 6 becomes deeper than the set depth, The front end rises due to the ground reaction force. When the traveling wheel 1 rides on the tiller projection, the body frame 5 rises with respect to the paddy surface, and the planting depth of the seedling planting mechanism 6 becomes shallower than the set depth, the front end side of the grounding float 7 is lowered by the float weight. .

  As shown in FIGS. 6 and 9, the interlock mechanism 60 is supported by the vehicle body frame 5 in a vehicle body sideways posture, and a valve switching body 61 that is connected to the rotation operation shaft 47 a of the wheel lift valve 47 so as to be integrally rotatable. A support shaft 62, an interlocking link 63 in which an intermediate portion is rotatably supported on one end side of the support shaft 62, and a pair of left and right swinging rods 64 that extend swingably from the support shaft 62 toward the rear of the vehicle body. , 64, an interlocking rod 65 connecting the extended end of the left swing rod 64 to the front bracket 54 of the left ground float 7, and an extended end of the right swing rod 64 And an interlocking rod 65 connected to the front bracket 54 of the right ground float 7.

  The pair of left and right swing rods 64 and 64 swing separately around the axis of the support shaft 62. The pair of left and right swing rods 64 and 64 includes an interlocking pin 66 attached over the base of the left swing rod 64 and the arm portion 64a of the right swing rod 64. The valve switching body 61 is oscillated and biased to the lowering operation side by a spring 67 connected to the arm portion 61a. The spring 67 swings and biases the valve switching body 61 so that the passive portion 61b made of a roller of the valve switching body 61 and the operation arm portion 63a of the interlocking link 63 come into contact with each other, and the interlocking link. The interlocking link 63 is oscillated and biased so that the passive portion 63b formed by the protrusions 63 contacts the interlocking pin 66.

  When the front end sides of the pair of left and right grounding floats 7 and 7 are both lifted from the reference position, the pair of left and right swinging rods 64 and 64 are both lifted by the interlocking rod 65. Then, the interlocking pin 66 is raised as a whole to push up the passive portion 63b of the interlocking link 63, and the interlocking link 63 is swung around the axis of the support shaft 62 to lower the arm portion 63a. The part 63a presses the passive part 61b of the valve switching body 61 to swing the valve switching body 61, and the valve switching body 61 switches the wheel lift valve 47 to the wheel lowering side.

  When the front end sides of the pair of left and right grounding floats 7 and 7 are both lowered from the reference position, the pair of left and right swinging rods 64 and 64 are both lowered by the interlocking rod 65. Then, the interlocking pin 66 is lowered, the interlocking link 63 is swung around the axis of the support shaft 62 by the spring 67 to raise the arm portion 63a, and the valve switching body 61 is swung by the spring 67. Then, the wheel lift valve 47 is switched to the wheel lift side.

  When one front end side of the pair of left and right grounding floats 7 and 7 is raised from the reference position and the other front end side is lowered from the reference position, the pair of left and right swinging rods 64 and 64 are moved up and down in opposite directions. Then, the interlocking pin 66 is operated in an inclined state in which one end side is lowered with respect to the passive portion 63b of the interlocking link 63 and the other end side is lifted so that the interlocking link 63 is not swung, and the interlocking link 63 assumes a neutral posture. The valve switching body 61 is maintained in the neutral state, and the wheel lift valve 47 is operated to the neutral position.

  That is, when the pair of left and right grounding floats 7 and 7 are both lifted and swung from the reference position, the interlocking mechanism 60 switches the wheel lift valve 47 to the wheel ascending side by this rising and swinging, and the pair of left and right grounding floats 7 and 7 When both 7 are swung downward from the reference position, the wheel lift valve 47 is switched to the wheel lowering side by this downward swing, and when the pair of left and right grounding floats 7, 7 are lifted and lowered from the reference position in opposite directions, The pair of left and right grounding floats 7, 7 and the wheel lift valve 47 are interlocked so as to maintain the lift valve 47 in a neutral state.

  As shown in FIGS. 3 and 6, the pair of left and right vehicle body main frames 16, 16 has a smaller distance in the vehicle body lateral direction between the pair of left and right vehicle body main frames 16, 16 toward the front end side of the vehicle body main frame, and The front end side of the pair of left and right vehicle body main frames 16, 16 has an arrangement state in which the front end side is located on the inner side in the vehicle body lateral direction than the end of the support shaft 62 in the interlocking mechanism 60. The vehicle body frame 5 is configured in such a manner that it is as far as possible in the lateral direction.

  As shown in FIGS. 1 and 2, the preliminary seedling stage 14 is constituted by a round bar connected in combination in a net shape, and has a size for placing and storing one preliminary mat-like seedling. A mounting surface is provided. In the preliminary seedling stage 14, the long side direction (seedling vertical direction) of the stored preliminary mat-shaped seedling is lateral to the vehicle body, and the short side direction (seedling lateral direction) of the stored preliminary mat-shaped seedling is front-to-back. The mounting posture is supported by the pair of left and right seedling support columns 70, 70.

As shown in FIGS. 2 and 7, the bonnet 13 includes a through hole 13a provided on the rear end side thereof. The through hole 13 a is located below the preliminary seedling mount 14.
That is, the bonnet 13 looks through the steering position behind the self-propelled vehicle between the pair of left and right seedling support columns 70 and 70 and through the through-hole 13a and near the front of the traveling wheel grounding point on the surface. Is possible.

  As shown in FIG. 7, the rear end side of the bonnet 13 is rotatably supported by the connecting frame 20, and the bonnet 13 swings up and down around the axis of the connecting frame 20 facing the vehicle body sideways. Open and close. When the bonnet 13 is opened and closed, the bonnet 13 is fixed in an ascending open position and a descending closed position by a lock mechanism 71 provided on the front end side of the bonnet 13.

  FIG. 12 is a side view of the lock mechanism 71. FIG. 13 is a plan view of the lock mechanism 71. As shown in these drawings, the lock mechanism 71 includes a support rod 73 supported by a stay 72 that supports an end of the fuel tank 12 on the front side of the vehicle body so as to be swingable up and down, and a front end of the bonnet 13. Is provided with a support rod holder 74 provided on the inner side and a lock spring 75 formed of a leaf spring.

  The support rod 73 includes a pair of left and right arm flange portions 73a and 73a whose base portions are rotatably supported by the stay 72, and a connection flange portion 73b that connects the free end sides of the pair of left and right arm flange portions 73a and 73a. And. The support rod holder 74 slidably holds the connection rod portion 73b by a long hole 74b in the bonnet longitudinal direction provided in the pair of left and right support piece portions 74a and 74a.

  FIG. 12B is a side view of the lock mechanism 71 with the hood open. As shown in this figure, when the bonnet 13 is lifted, the support rod 73 is lifted and swung by a pulling operation by the support rod holder 74, and the connecting rod portion 73b of the support rod 73 moves through the long hole 74b. When the bonnet 13 is in the ascending open position, the connecting collar 73b is positioned at the rear end of the long hole 74b, and the action part 75a of the lock spring 75 pushes the connecting hook 73b to the rear end of the long hole 74b to support it. The collar 73 is held in the raised posture against the load of the bonnet 13 and supports the bonnet 13 in a raised and open posture. As a result, the lock mechanism 71 fixes the hood 13 in the upward opening posture.

  FIG. 12A is a side view of the lock mechanism 71 with the hood closed. As shown in this figure, when the bonnet 13 is lowered, the support rod 73 is lowered and swung by a push-down operation by the support rod holder 74, and the connecting rod portion 73b of the support rod 73 moves through the long hole 74b. When the bonnet 13 is in the lowered and closed posture, the connecting collar 73b is positioned at the rear end of the long hole 74b, and the action part 75a of the lock spring 75 presses the connecting collar 73b to the rear end of the long hole 74b to support it. The collar 73 is held in the lowered posture, and the bonnet 13 is pushed and supported in the lowered and closed posture. Thereby, the lock mechanism 71 fixes the bonnet 13 in the descending closed posture.

  As shown in FIG. 7, the end of the fuel tank 12 on the vehicle body rear side is supported by an upper end of a tank support member 78 having a lower end connected to the transmission case 15. The tank support member 78 is located between the engine 2 and the fuel tank 12 and the traveling wheel 1 and has a size covering the front upper side of the traveling wheel 1, and the mud soil flying from the traveling wheel 1 is removed from the engine 2 and the fuel. A mudguard cover is configured to be received so as not to adhere to the tank 12.

  As shown in FIGS. 1 and 2, the seedling planting portion 8 includes the pair of left and right seedling planting mechanisms 6 and 6 and the pair of left and right grounding floats 7 and 7, and is provided above the handle frame 17. A single seedling stage 80 is provided. The seedling stage 80 is in a rearwardly inclined posture located on the rear side of the vehicle body on the upper end side.

  As shown in FIGS. 4, 14, and 15, each seedling planting mechanism 6 is supported by a drive arm 82 and a swing link 83 on the vehicle body inward side of the rear end portion of the vehicle body main frame 16. An arm 6a and a seedling planting claw 6b provided on the tip side of the planting arm 6a are provided.

Each seedling planting mechanism 6 is configured so that the tip end side of the seedling planting claw 6b is disposed on the lower end side of the seedling placing table 80 and supported by the vehicle body frame 5 by the drive arm 82 being driven to rotate by the drive shaft 39. A seedling planting motion is performed in which a seedling take-out port 85 (see FIG. 16) provided on a certain guide rail 84 and a rice field are reciprocated while drawing a rotation trajectory T as shown in FIG.
As a result, each seedling planting mechanism 6 cuts and removes one block of seedling from the lower end of the mat-like seedling of the seedling mount 82 at the seedling takeout port 85, and removes the taken block seedling from the seedling takeout port 85. It is transported down and planted in a place leveled by the grounding float 7 on the rice field.

  As shown in FIGS. 16, 17, and 18, the seedling stage 80 includes a pair of seedling placement portions 80 a and 80 a that supply seedlings separately to the pair of left and right seedling planting mechanisms 6 and 6, arranged in the lateral direction of the vehicle body. In this state, the guide rail 84 is supported so as to be slidable in the lateral direction of the vehicle body. The seedling stage 80 includes a connecting means 90 that protrudes from the lower end side of the seedling stage 80 to the front side of the vehicle body. The connecting means 90 interlocks the transfer body 101 of the seedling lateral feed mechanism 100 provided on the front side of the vehicle body with respect to the seedling platform 80 and the seedling platform 80. As shown in FIG. 1, the seedling feed mechanism 100 is disposed on the rear side of the vehicle body with respect to the vertical line A passing through the axle core X of the traveling wheel 1 and outside the outer periphery of the traveling wheel 1. .

  That is, the seedling stage 80 is reciprocated in the lateral direction of the vehicle body along the guide rail 84 in conjunction with the seedling planting movement of the seedling planting mechanism 6 by the seedling lateral feed mechanism 100, and the pair of right and left seedling planting mechanisms 6. In order to take out the block seedling from the lower end portion of the mat-like seedling of the seedling placement portion 80a to which the corresponding seedling placement portion 80a corresponds, each of the mat-like seedlings is taken out sequentially from one end side to the other end side in the lateral direction. The mat-like seedling of the seedling placement portion 80a is reciprocated in the lateral direction of the vehicle body with respect to the corresponding seedling outlet 85.

  17 and 18 are side views of the seedling lateral feed mechanism 100. FIG. FIG. 20 is a plan view of the seedling lateral feed mechanism 100. As shown in these drawings, the seedling lateral feed mechanism 100 includes the transfer body 101 and also includes a laterally directed guide shaft 102 to which a cylindrical body portion 101a of the transfer body 101 is externally fitted. .

  The guide shaft 102 is rotatably supported by the upper end portion of the transmission case 19 and the upper end portion of the support frame 18. The guide shaft 102 is covered with a bellows tube 103 attached to the transfer body 101 and the guide shaft 102 over the end portion. A traveling wheel 1 indicated by a two-dot chain line in FIG. 17 indicates a traveling wheel at the rising limit. As shown in the figure, the guide shaft 102 is located on the front side of the vehicle body with respect to the rearmost end portion 1b of the traveling wheel 1 in the most elevated state of the traveling wheel 1, and the weight of the seedling lateral feed mechanism 100 travels. The seedling lateral feed mechanism 100 is configured in a state where it is applied to the self-propelled vehicle near the wheel 1.

  The guide shaft 102 includes a pair of feed grooves 104 and 104 provided spirally on the outer peripheral surface thereof. The pair of feed grooves 104, 104 have different spiral directions, and the engaging claws 105 provided on the cylindrical body portion 101 a at both ends of the guide shaft 102 are connected from one feed groove 104 to the other feed groove 104. They are in communication with each other to move.

  As shown in FIG. 15, the guide shaft 102 is driven by transmitting the driving force of the drive shaft 39 of the right seedling planting mechanism 6 by the transmission case 19. That is, the transmission case 19 includes a seedling feed transmission unit 110 having the drive shaft 39 as an input shaft, and a transmission chain 115 wound around the output shaft 111 of the seedling transmission transmission unit 110 and the guide shaft 102. The transmission means provided is accommodated.

  The cylindrical body portion 101a of the transfer body 101 is externally fitted to the guide shaft 102 so as to be rotatable and relatively slidable, and the engaging claw 105 is slidably engaged with the feed groove 104. The transfer body 101 is engaged with the guide shaft 102 so as to be reciprocated in the lateral direction of the vehicle body along the guide shaft 102 by the feeding action of the pair of feed grooves 104, 104 with respect to the engaging claws 105. The transfer direction of the transfer body 101 is determined by the spiral direction of the feed groove 104 in which the engagement claw 105 is engaged. When the engagement claw 105 is engaged in one of the feed grooves 104, the transfer body 101 is directed to the right side of the vehicle body. When the pawl 105 is engaged with the other feed groove 104, the vehicle body is directed leftward.

  The transfer body 101 includes bushes 106 provided at both ends of the cylindrical body portion 101a, and the guide shaft 102 does not cause twisting between the cylindrical body portion 101a and the guide shaft 102 due to the action of the bush 106. Rotate and slide against.

  As shown in FIGS. 16 and 18, the connecting means 90 includes a gate-shaped connecting frame 91 that is connected over both lateral ends on the lower end side of the seedling stand 80, and a connecting frame 91 having a portal shape when viewed in the vehicle body vertical direction. The connecting plate 93 is connected to the lower ends of the pair of left and right connecting plates 10b and 10b of the transfer body 101.

  That is, the seedling horizontal feed mechanism 100 rotates the guide shaft 102 by the driving force transmitted from the drive shaft 39 by the transmission means of the transmission case 19, and the guide body 102 moves the transfer body 101 along the guide shaft 102. The lateral transfer force is output by the transfer body 101 by reciprocating in the lateral direction of the vehicle body, and this lateral transfer force is transmitted to the seedling stage 80 via the connecting body 92 and the connecting frame body 91, thereby The seedling stage 80 is reciprocated in the lateral direction of the vehicle body along the guide rail 84.

  As shown in FIGS. 16 and 17, the seedling stage 80 is provided with a plurality of freely rotatable seedlings arranged side by side in the horizontal and vertical directions of the seedling stage 80 on the back side of the lower end of each seedling placement part 80 a. The seedling vertical feed bodies 120 and 121 are provided. Of the plurality of seedling vertical feed bodies 120 and 121, the upper seedling vertical feed body 120 arranged in a row in the horizontal direction on the seedling stage on the upper stage side is supported by a single upper vertical feed shaft 122 so as to be integrally rotatable. Has been. The lower seedling vertical feed bodies 121 arranged in a row in the lateral direction on the lower stage side are supported by a single lower vertical feed shaft 123 so as to be integrally rotatable. The upper vertical feed shaft 122 and the lower vertical feed shaft 123 are interlocked so as to rotate in conjunction with the seedling vertical feed direction by an interlocking chain 124 (see FIG. 20) on the lateral one end side of the seedling mounting base 80. The upper vertical feed shaft 122 includes an input arm 125 provided at an intermediate portion of the upper vertical feed shaft 122 in the lateral direction of the seedling platform.

  The input arm 125 is linked to a vertical feed operation member 131 of a seedling vertical feed mechanism 130 provided on the vehicle body front side of the seedling mount 80 via an interlocking means 126 formed of an interlocking rod. The interlocking means 126 includes a through-hole 127 provided in a partition wall positioned between the pair of seedling placement units 80 a and 80 a of the seedling-mounting base 80 and a through-hole provided in the connection plate body 93 of the connection frame body 91. 128 is inserted.

In other words, when the seedling stage 80 reaches the left and right lateral movement slot end, the vertical feed operation force by the seedling vertical feed mechanism 130 is input to the input arm 125 via the interlocking means 126, and the input arm 125 The upper vertical feed shaft 122 is rotationally driven, and the driving force of the upper vertical feed shaft 122 is transmitted to one end side of the lower vertical feed shaft 123 by the interlocking chain 124 to rotationally drive the lower vertical feed shaft 123. All the seedling vertical feed rotators 120, 121 are rotationally driven in the seedling vertical feed direction by a set rotation angle so that the matted seedlings of each seedling placement unit 80a are transferred to the upper seedling vertical feed rotary body 120 and the lower seedling vertical seedling. The feed rotator 121 feeds vertically to the seedling take-out port 85.
That is, when the seedling stage 80 reaches the left and right lateral movement stroke end, the seedling take-out port 85 is transferred to the mat-like seedling of each seedling placement part 80a by the seedling vertical feed rotating bodies 120 and 121 on the upper side and the lower side. The seedlings can be taken out from the lower end portion of the mat-like seedling by the seedling planting mechanism 6 when the seedling mounting table 80 is laterally transferred later.

  As shown in FIGS. 18 and 20, the seedling vertical feed mechanism 130 includes the vertical feed operation member 131 and also includes vertical feed drive arms 132 provided at both ends of the guide shaft 102.

  Each of the longitudinal feed drive arms 132 is supported by the guide shaft 102 so as to be integrally rotatable, and is always rotationally driven by the guide shaft 102 in the rotation direction B (see FIG. 18).

The vertical feed operation member 131 is pivotally supported on the upper end side of the pair of left and right connecting plate portions 101 b and 101 b of the transfer body 101 via a connecting pin 133, and the vehicle body of the connecting pin 133 is connected to the transferring body 101. It swings around the lateral axis and moves with the moving body 101 with respect to the guide shaft 102.
That is, the vertical feed operation member 131 is reciprocated in the lateral direction of the vehicle body together with the seedling stage 80 by the transfer body 101, and when the seedling stage 80 reaches the left and right lateral movement stroke ends, the vertical feed operation member 131 is moved to the sheet metal. Of the pair of left and right vehicle body side passive arms 134 and 134 provided with members, the passive arm 134 on the side corresponding to the lateral movement stroke end of the seedling stage 80 is a drive composed of a roller of the vertical feed drive arm 132. It abuts against the portion 132a and is driven to swing around the lateral axis of the connecting pin 133 by the longitudinal feed drive arm 132.

  The input arm 125 is connected to the upper longitudinal feed shaft 122 via a one-way rotary clutch 135. The one-way rotation clutch 135 interlocks the input arm 125 and the upper vertical feed shaft 122 so that the driving force of the input arm 125 is transmitted to the upper vertical feed shaft 122 when the input arm 125 is driven in the forward rotation direction. . The one-way rotary clutch 135 includes an input arm 125 and an upper vertical feed shaft 122 so that the rotational force of the input arm 125 is not transmitted to the upper vertical feed shaft 122 when the input arm 125 is returned to the standby position by a return spring. Rotate relative.

  That is, the seedling vertical feed mechanism 130, when the seedling stage 80 reaches the left and right lateral movement stroke ends, is passed through the passive arm 134 by the vertical feed driving arm 132 on the side corresponding to the seedling stage 80 horizontal transfer stroke end. The longitudinal feed operation member 131 is driven to swing by a set angle, and a longitudinal feed operation force is output from the longitudinal feed operation member 131. This longitudinal feed operation force is transmitted to the input arm 125 via the interlocking means 126, and this The input arm 125 is swung from the standby position by a set angle, whereby all the vertical feed bodies 120 and 121 of the seedling stage 80 are rotationally driven in the seedling vertical feed direction by the set rotation angle.

  As shown in FIG. 1, the steering unit 4 includes the steering handle 3, a pair of operating tools 140 and 141 provided in the lateral direction of the vehicle body below the steering handle 3, and the pair of left and right operating tools. 140 and 141 are provided with an operation guide 142 inserted therethrough.

  As shown in FIGS. 1 and 3, the steering handle 3 is composed of a single bent pipe material, and includes a pair of left and right handle bodies 3a, 3a facing the vehicle body and a pair of left and right handle bodies 3a, 3a. The vehicle body has a laterally extending connecting rod 3b for connecting the front end portions. The steering handle 3 is attached to the rear end portion of the handle frame 17 by the connecting rod 3b so that the mounting angle can be adjusted by swinging up and down, and by adjusting the mounting angle, the pair of left and right handle main bodies 3a are attached. , 3a is changed in height at the rear end.

  The pair of left and right operation tools 140 and 141 and the operation guide 142 are supported by the handle frame 17 in an arrangement that is biased laterally to the same side of the vehicle body as the wheel drive case 10 is located with respect to the traveling wheel 1. The weights of the operation tools 140 and 141 and the operation guide 142 are applied to the self-propelled vehicle on the side opposite to the side where the weight of the transmission case 15 is applied to the center line CL together with the weight of the wheel drive case 10. It is in a state.

  As shown in FIGS. 10 and 11, one operation tool 141 of the pair of left and right operation tools 140 and 141 extends so as to be rotatable integrally with the float support shaft 51. The seedling planting depth of each seedling planting mechanism 6 is changed by swinging and adjusting along the guide groove 143 of the operation guide 142 around the core.

  That is, the float support shaft 51 is rotationally adjusted by adjusting the swing of the operation tool 140, and swings up and down the pair of left and right support arms 52, 52 around the axis of the float support shaft 51. Then, each support arm 52 adjusts the connecting pin 53 up and down to increase or decrease the mounting height of the grounding float 7 with respect to the vehicle body frame 5. When the height of the pair of left and right grounding floats 7 and 7 is adjusted with respect to the body frame 5, the set ground height of the body frame 5 set by the grounding to the surface is changed, and the seedling planting of each seedling planting mechanism 6 is changed. The depth is changed to a depth corresponding to the operation position of the operation tool 140.

As shown in FIGS. 10 and 14, the other operation tool 140 of the pair of left and right operation tools 140 and 141 is a seedling removal amount adjusting means.
That is, the operating tool 140 extends integrally from a laterally facing seedling amount adjustment shaft 144 that is rotatably supported by the handle frame 17, and the manipulator 140 extends around the axis of the seedling amount adjustment shaft 144. By swinging and adjusting along the guide groove 145 of the operation tool guide 142, the amount of seedling in the vertical direction of the mat-like seedlings of each seedling planting mechanism 6 is changed.

  That is, the seedling removal amount adjusting shaft 144 includes an operation arm 146 extending from both end sides thereof so as to be integrally rotatable forward of the vehicle body. The pair of left and right operation arms 146 and 146 are swingably adjusted up and down by the seedling amount adjusting shaft 144 when the seedling amount adjusting shaft 144 is rotated and connected to the support shaft 147 of the guide rail 84. The support shaft 147 is slidably adjusted up and down with respect to the support member 149 by acting on the operation portion 148, and the guide rail 84 and the seedling stage 80 are moved with respect to the rotation trajectory T of the seedling planting mechanism 6. Adjust the vertical movement along the vertical direction of the seedling platform. When the guide rail 84 and the seedling stage 80 are adjusted upward relative to the rotation trajectory T, the seedling vertical direction with respect to the mat-shaped seedling when the seedling-planting claw 6b of each seedling planting mechanism 6 takes out the block seedling from the mat-shaped seedling. Therefore, the amount of seedling in the seedling planting mechanism 6 is small. When the guide rail 84 and the seedling stage 80 are adjusted downward with respect to the rotation trajectory T, the seedling vertical direction of the matted seedling when the seedling planting claw 6b of each seedling planting mechanism 6 takes out the block seedling from the mat-shaped seedling. As a result, the amount of seedling in the seedling planting mechanism 6 increases.

  In other words, the seedling removal amount adjusting shaft 144 is rotated and adjusted by the operation tool 140 when the operation tool 140 is swung, so that the guide rail 84 and the seedling mounting table 80 are placed on the seedling planting mechanism 6. The amount of seedlings in the vertical direction of the mat-like seedlings of each seedling planting mechanism 6 is changed to an amount corresponding to the operating position of the operation tool 140 by adjusting the movement in the vertical direction of the table.

  As shown in FIGS. 16 and 17, the connecting frame body 91 of the connecting means 90 includes the connecting plate body 93, and the connecting plate body 93 and the seedlings are arranged at both ends of the connecting plate body 93 in the vehicle body lateral direction. A horizontal connecting plate 94 provided so as to connect the horizontal end of the mounting table 80 is provided.

The connecting plate 93 has a size W in the vertical direction of the vehicle body that is larger than the diameter D of the guide shaft 102. The connecting plate 93 is positioned along the outer periphery of the traveling wheel 1 in a side view of the vehicle body, and has an assembly posture that is positioned over the entire width of the seedling platform 80 in front of the seedling platform 80.
Accordingly, the connecting plate 93 receives the mud splashed up by the traveling wheels 1 so as to prevent the mud from splashing toward the seedling stage 80, and prevents the mat-like seedling of the seedling stage 80 from adhering to the mud. Constructs a mudguard cover. The connection plate 93 receives the matted seedling leaves placed on each seedling placement portion 80a of the seedling placing stand 80 so as not to fall into the seedling lateral feed mechanism 100 and the seedling vertical feed mechanism 130, A seedling stay that avoids damage due to contact with the seedling lateral feed mechanism 100 and the seedling vertical feed mechanism 130 is configured.

The connecting means 90 includes an adjusting portion 95 provided on a connecting body 92 as shown in FIG.
The adjusting portion 95 is configured to be fitted with a connecting bolt 96 that connects the connecting body 92 and the connecting plate body 93, and is configured by a bolt hole configured as a long hole along the lateral direction of the vehicle body. Then, the connecting position of the connecting frame body 91 and the connecting body 92 in the lateral direction of the vehicle body is adjusted, thereby adjusting the connecting position of the seedling stage 80 in the lateral direction of the seedling stage with respect to the transfer body 101.
That is, the adjusting unit 95 is configured so that seedling removal by the seedling planting mechanism 6 when the seedling placing table 80 reaches the stroke end of the lateral movement is performed in a state where no leftover is generated on the lateral end side of the mat-shaped seedling. The connection position in the lateral direction of the seedling platform with respect to the transfer body 101 of the platform 80 is adjusted.

The connecting means 90 includes an accommodation 97 provided in the connecting body 92 as shown in FIG.
The accommodation 97 is configured such that a connection pin 98 for connecting the connection plate portion 101b of the transfer body 101 and the connection body 92 is slidably mounted, and the amount of seedling removal of the seedling stage 80 is adjusted. It is constituted by a pin hole formed in a long hole along the moving direction by the shaft 144, and allows relative movement of the seedling stage 80 with respect to the transfer body 101 when the amount of seedling removal is adjusted by the operation tool 140. ing.
That is, when the movement of the seedling stage 80 accompanying the seedling removal amount adjustment is transmitted to the transfer body 101, the transfer body 101 rotates with respect to the guide shaft 102. Then, the transfer body 101 moves in the axial direction of the guide shaft 102 with respect to the guide shaft 102 in order to engage the engaging claw 105 with respect to the feed groove 104, and the lateral movement of the seedling stage 80 occurs to form a mat. The movement of the seedling with respect to the seedling outlet 85 occurs. The accommodation 97 allows the seedling removal amount adjustment by the operation tool 140 to be performed without causing the seedling movement described above.

  FIG. 21 is a side view of the inter-stock transmission unit 30. FIG. 22 is a plan view of the inter-variety transmission unit 30. As shown in these drawings, the inter-shaft transmission unit 30 includes a small-diameter gear 33 and a large-diameter gear 34 that meshes with the small-diameter gear 33 in addition to the input shaft 31 and the output shaft 32. . The small-diameter gear 33 and the large-diameter gear 34 can be replaced with the input shaft 31 and the output shaft 32, and are engaged with both the input shaft 31 and the output shaft 32 so as to be integrally rotatable. A configured mounting hole is provided.

  That is, FIG. 21A is a side view of the inter-company transmission unit 30 in a high speed state. As shown in this figure, the inter-shaft transmission unit 30 is configured such that when the large-diameter gear 34 is attached to the input shaft 31 and the small-diameter gear 33 is attached to the output shaft 32, the driving force of the input shaft 31 is applied to the large-diameter gear 34. And the small-diameter gear 33 increase the speed and output from the output shaft 32. When the inter-strain shifting unit 30 is switched to the high speed state, the driving speed of each seedling planting mechanism 6 is increased, and the interval (between plants) of the planted seedlings of each seedling planting mechanism 6 in the traveling direction of the self-propelled vehicle is reduced.

  FIG. 21B is a side view of the inter-company transmission unit 30 in the low speed state. As shown in this figure, the inter-stock transmission unit 30 is configured such that when the small-diameter gear 33 is attached to the input shaft 31 and the large-diameter gear 34 is attached to the output shaft 32, the driving force of the input shaft 31 is The large-diameter gear 34 decelerates to output from the output shaft 32. When the inter-strain shifting unit 30 is switched to the low speed state, the driving speed of each seedling planting mechanism 6 is slowed down, and the interval (between plants) of the planted seedlings of each seedling planting mechanism 6 in the traveling vehicle traveling direction is increased.

As shown in FIG. 22, the input shaft 31 and the output shaft 32 have a large diameter gear 34 and a small diameter gear 33 in a state where the large diameter gear 34 and the small diameter gear 33 are entirely exposed to the outside of the transmission case 15. Gear support portions 31 a and 32 a are exposed outside the mission case 15. The transmission case 15 includes a gear cover 30b that is detachably fixed to a side portion of the transmission case 15 by a connecting bolt 30a and covers the large diameter gear 34 and the small diameter gear 33. The gear cover 30b is provided with an oil pan-shaped container shape having a recess in the case that accommodates the large-diameter gear 34 and the small-diameter gear 33 that are exposed from the transmission case 15 in a state where the gear cover 30b is fixed to the transmission case 15. Yes.
In other words, when gear shift 30 is changed, when gear cover 30b is removed, large-diameter gear 34 and small-diameter gear 33 are exposed from transmission case 15 as a whole, and handling of gears 34, 33 is facilitated. , 34 can be quickly replaced with respect to the input shaft 31 and the output shaft 32.

  FIG. 23 is a side view of the lateral feed transmission unit 110. As shown in FIG. 15 and FIG. 15, the lateral feed transmission unit 110 is engaged with the input gears 112 a and 112 b that are rotatably supported by the drive shaft 39, and the input gears 112 a and 112 b. An output shaft gear 113 that is rotatably supported by the output shaft 111 and a gear cover 114 that covers the input gears 112a and 112b and the output shaft gear 113 are provided.

  The gear cover 114 is detachably fixed to the transmission case 19 by a connecting bolt 114a.

The output shaft gear 113 is configured as a transfer gear, and allows the lateral feed transmission unit 110 to be switched between a high speed state and a low speed state only by exchanging the input gear.
That is, FIG. 23A is a side view of the lateral feed transmission unit 110 in a high speed state. As shown in this figure, when the input gear 112a having a large number of teeth is attached to the drive shaft 39, the lateral feed transmission unit 110 sets a reduction speed ratio by the input gear 112a and the output shaft gear 113, and the drive shaft 39 The driving force is reduced at the set reduction speed ratio and output from the output shaft 111. When switched to the high speed state, the lateral feed transmission unit 110 increases the transfer speed of the transfer body 101 of the seedling lateral feed mechanism 100 and reduces the number of seedlings to be taken in the mat-like seedling lateral direction of each seedling planting mechanism 6.

  FIG. 23B is a side view of the transverse feed transmission unit 110 in a low speed state. As shown in this figure, when the input gear 112b having a small number of teeth is attached to the drive shaft 39, the lateral feed transmission unit 110 sets a high reduction ratio by the input gear 112b and the output shaft gear 113, and the drive shaft 39 The driving force is reduced at a set high reduction ratio and output from the output shaft 111. When switched to a low speed state, the lateral feed transmission unit 110 slows the transfer speed of the transfer body 101 of the seedling lateral feed mechanism 100 and increases the number of times of seedling removal in the mat-like seedling lateral direction of each seedling planting mechanism 6.

FIG. 24 is a side view of the seedling lateral feed mechanism 110 having another implementation structure. In this seedling horizontal feed mechanism 110, the transfer body 101 has a guide shaft 102 provided with a pin hole 107 provided in the connection plate portion 101b so that a connection pin 98 between the connection plate portion 101b and the connection body 92 is mounted. It comprises and comprises in the elongate hole along the straight line which passes along the shaft core.

  That is, when the seedling stage 80 is moved and adjusted in the vertical direction of the seedling stage in order to adjust the seedling removal amount by the operation tool 140, the transfer body 101 is connected to the connecting frame body 90 and the connecting body 92 by the seedling stage 80. It rotates around the axis of the guide shaft 102 due to the operating force applied through the connecting pin 98 and the action of the long hole of the pin hole 107, thereby allowing the seedling stage 80 to move.

  FIG. 25 is a side view of the inter-company transmission unit 30 having another implementation structure. The inter-shaft transmission unit 30 is supported by the input shaft 31 such that the input shaft gears 150a and 150b are rotatably supported by the input shaft 31, and the output shaft 32 is integrally rotated by the input shaft gears 150a and 150b. Output shaft gear 151.

The output shaft gear 151 is configured as a transfer gear, and the switching between the high speed state and the low speed state of the inter-company transmission unit 30 is performed only by exchanging the input shaft gear.
That is, FIG. 25A is a side view of the inter-company transmission unit 30 in a high speed state. As shown in this figure, when the input shaft gear 150a having a large number of teeth is attached to the input shaft 31, the inter-shaft transmission unit 30 sets a reduction speed ratio by the input shaft gear 150a and the output shaft gear 151, and the input shaft gear The driving force of 31 is decelerated at the set reduction speed ratio, and a high speed state is set so as to output from the output shaft 32. When the inter-strain shifting unit 30 is switched to the high speed state, the driving speed of each seedling planting mechanism 6 is increased, and the interval (between plants) of the planted seedlings of each seedling planting mechanism 6 in the traveling direction of the self-propelled vehicle is reduced.

  FIG. 25B is a side view of the inter-company transmission unit 30 in the low speed state. As shown in this figure, when the input shaft gear 150b having a small number of teeth is attached to the input shaft 31, the inter-shaft transmission unit 30 sets a high reduction ratio by the input shaft gear 150b and the output shaft gear 151, and the input shaft The driving force of 31 is decelerated at the set high reduction ratio, and the low speed state is entered so as to output from the output shaft 32. When the inter-strain transmission unit 30 is switched to the low speed state, the driving speed of each seedling planting mechanism 6 is decreased, and the interval (between plants) of the seedling planting mechanism 6 in the traveling vehicle traveling direction is increased.

[Another Example]
Instead of the seedling horizontal feed mechanism 100 of the above embodiment, the transfer body 101 is rotationally driven at a fixed position, and the guide shaft 102 is reciprocated in the lateral direction of the vehicle body by the transfer body 101 to output a lateral transfer force to the seedling mounting table 80. Even when the configuration is adopted, the object of the present invention is achieved, and this configuration may be adopted.

Overall side view of walking rice transplanter Overall plan view of walking rice transplanter Plan view of body frame Rear view of the seedling planting mechanism on the body frame Transmission system diagram Plan view at the location where the engine and transmission case of the self-propelled vehicle are located Side view of the front of the self-propelled vehicle Cross section of the mission case and wheel drive case (A) is a side view of the interlocking mechanism when the grounding float is raised, and (b) is a side view of the interlocking mechanism when the grounding float is lowered. Plan view of grounding float support structure and operation tool arrangement part Side view of grounding float support structure (A) is a side view of the lock mechanism with the hood closed, and (b) is a side view of the lock mechanism with the hood open. Top view of the locking mechanism Side view of seedling planting part Rear view of seedling planting mechanism Plan view of the bottom of the seedling stand Side view of seedling stand, seedling lateral feed mechanism and seedling vertical feed mechanism Side view of seedling stand, seedling lateral feed mechanism and seedling vertical feed mechanism Perspective view of the connector Plan view of seedling horizontal feed mechanism and seedling vertical feed mechanism (A) is a side view in the high speed state of the inter-company transmission unit, (b) is a side view in the low-speed state of the inter-company transmission unit. Plan view of inter-shaft transmission Of the transverse transmission Side view of seedling lateral feed mechanism with another implementation structure (A) is a side view in the high speed state of the inter-part transmission unit with another implementation structure, (b) is a side view in the low-speed state of the inter-part transmission unit with another implementation structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling wheel 1b The last end part 3 of a traveling wheel Steering handle 6 Seedling planting mechanism 8 Seedling planting part 19 Transmission case 80 Seedling stand 90 Connecting means 93 Connecting plate body 95 Adjusting means 97 Interchange 100 Seedling lateral feed mechanism 101 Transfer body 102 Guide Axis 140 Seedling amount adjusting means A Vertical line D Diameter of guide shaft W Size of connecting plate X Axle core

Claims (8)

A self-propelled vehicle having one traveling wheel and a steering handle provided on the rear side of the vehicle body relative to the traveling wheel, and in an inclined posture positioned on the rear side of the vehicle body toward the upper end side on the rear side of the vehicle body with respect to the traveling wheel. A walking type rice transplanter provided with a seedling planting section having a seedling mounting base provided movably in the lateral direction of the vehicle body and two seedling planting mechanisms arranged in the lateral direction of the vehicle body,
By driving the vehicle body sideways guide shaft and the transfer body engaged with the guide shaft so as to be relatively rotatable and relatively slidable relative to each other, a lateral transfer force is applied to the seedling platform, A vertical line passing through the axle center of the traveling wheel on the front side of the vehicle body relative to the seedling platform, a seedling lateral feed mechanism that moves the seedling platform back and forth in the lateral direction of the vehicle body in conjunction with the seedling planting movement of the seedling planting mechanism A walking type rice transplanter that is disposed on the rear side of the vehicle body and outside the outer periphery of the traveling wheel. The traveling wheel is supported so as to swing up and down,
The walking type rice transplanter according to claim 1, wherein the guide shaft is positioned on the vehicle body front side with respect to the rearmost end portion of the traveling wheel in a state where the traveling wheel is at its highest position.   The walking type rice transplanter according to claim 1, further comprising a transmission case that transmits power to the seedling lateral feed mechanism so as to overlap with the traveling wheel in a side view of the vehicle body.   Of the guide shaft and the transfer body, the member that outputs a lateral transfer force to the seedling platform and a connecting means that connects the seedling platform so as to be integrally movable are configured to output the output of the seedling platform. The walking type rice transplanter as described in any one of Claims 1-3 provided with the adjustment part which adjusts the connection position in the seedling stand horizontal direction with respect to a member. Comprising a seedling removal amount adjusting means for moving and adjusting the seedling mounting table in the vertical direction of the seedling mounting table with respect to the seedling planting mechanism;
Of the guide shaft and the transfer body, the member that outputs a lateral transfer force to the seedling platform and a connection means that connects the seedling platform so as to be integrally movable are configured to output the output of the seedling platform. The walking type rice transplanter according to any one of claims 1 to 3, further comprising a space for allowing relative movement in the vertical direction of the seedling platform with respect to the member. Of the guide shaft and the transfer body, a member that outputs a lateral transfer force to the seedling stage and a connecting means for connecting the seedling stage so as to be integrally movable are larger than the diameter of the guide shaft. A connecting plate body having a size in the vertical direction of the vehicle body is provided,
Both ends of the connecting plate body in the lateral direction of the vehicle body are connected to the horizontal end portions of the seedling platform, and the connecting plate body is assembled along the outer periphery of the traveling wheel in a side view of the vehicle body. The walking type rice transplanter according to any one of claims 1 to 5, which has a posture. The guide shaft is driven to rotate, and the transfer body is operated to move along the guide shaft so as to output a lateral transfer force to the seedling stage.
A vertical feed drive arm provided on the guide shaft so as to be integrally rotatable; a vertical feed operation member which is interlocked with a seedling vertical feed body provided in the seedling stage and moves laterally together with the seedling stage; and When the platform reaches the end of the lateral movement stroke, the vertical feed operating member abuts on the vertical feed drive arm and is driven to swing by the vertical feed drive arm to operate the seedling vertical feed body. The walking type rice transplanter according to any one of claims 1 to 6.   The walking type rice transplanter according to claim 7, wherein the vertical feed operation member is swingably supported by the transfer body.

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