JP6933199B2 - Porting machine - Google Patents

Description

The present invention relates to a transplanting machine for transplanting vegetable seedlings such as onions and lettuce into a field.

Conventionally, there is known a seedling transplanting machine for planting seedlings supplied from a seedling supply device in which a plurality of seedling containers move around, and a transplanting machine capable of double-row planting on the left and right (Patent Document 1).

This porting machine is equipped with a main frame having a curved shape from the vicinity of the rear part of the mission case to the rear side in a side view. Further, in a plan view, this main frame is provided substantially in the center of the left and right sides of the airframe.

Japanese Unexamined Patent Publication No. 2009-131177

However, in the transplant machine of Patent Document 1, since the main frame is provided at substantially the center position on the left and right sides of the machine body, the members are arranged so as to avoid the main frame. As a result, it is necessary for the part that is moved during work to have an operating locus that does not come into contact with the main frame even if it is closest to the main frame, which causes a problem that the design of the airframe is restricted.

Further, since each work device is mounted on one main frame, the load is likely to be accumulated in each part of the main frame, and there is a problem that the strength of the machine body is reduced over time.

It is an object of the present invention to provide a porting machine capable of maintaining a high body strength with a high degree of freedom in design even if the main frame is avoided in consideration of the conventional problems.

In order to solve the above problems, the following technical measures were taken.

That is, the invention according to claim 1 is a left and right traveling device (44) traveling in a field on a traveling vehicle body (40), a seedling supply device (43) for supplying seedlings, and seedlings from the seedling supply device (43). In a transplanting machine equipped with planting devices (20a, 20b) to receive and plant in a field, main frames (103) of the traveling vehicle body (40) are provided on both left and right sides of the machine body, and the rear ends of the left and right main frames (103) are provided. The left-right spacing of the portions is wider than the left-right spacing of the front end portion, and is configured to fit within the left-right width of the seedling supply device (43). ) Is rotatably provided, a control handle (47) for manipulating the machine body is provided at the rear of the traveling vehicle body (40), and the front side of the body of the left and right main frames (103) is provided. It is characterized in that it is attached to each of the axle covers (101) connected to the transmission case (38) , and the rear side of the fuselage is connected to both the left and right sides of the handle frame (104) supporting the control handle (47). It was a transplant machine.

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Further, in the first related invention according to claim 1, the left and right main frames (103) are between the front and rear sides of the traveling device (44) and the front side of the planting device (20a, 20b). The transplanting machine is characterized in that each of them is bent toward the outside of the machine body and toward the upper side of the machine body, and is bent toward the rear side of the machine body at the lower part of the seedling supply device (43).

In the second related invention, the seedling supply device (43) and the planting device (20a, 20b) are provided with a transmission case (26) for transmitting a driving force, and the seedling supply device (26) is provided with the seedling supply device (26). A supply support frame (107) for supporting 43) is provided, a vehicle body control unit (126) for a worker riding on the traveling vehicle body (40) to control the aircraft is provided, and the vehicle body is provided via the supply support frame (107). The transplant machine according to claim 1 and the first related invention, characterized in that a support member (105, 106f, 106r) for mounting the control member of the control unit (126) is provided.

In the third related invention, a front boarding step (113) on which an operator gets on and off from the front side of the machine is provided on the front side of the traveling vehicle body (40), and a bumper (109) is provided between the left and right sides of the front boarding step (113). The transplant according to claim 1 and the first or second related invention, wherein the front end portion of the bumper (109) is arranged on the front end portion of the fuselage side of the front end portion of the front boarding step (113). It was an opportunity.

In the fourth related invention, an engine (41) for generating a driving force in the traveling vehicle body (40) and a mission case (39) for branching and transmitting the driving force of the engine (41) are provided, and the mission case (39) is provided. ) Are provided with bumper support frames (108) for supporting the bumper (109), and the left and right bumper support frames (108) are arranged so as not to come into contact with the engine (41), respectively. The transplantation machine described in the third related invention was used.

According to the invention of claim 1, the left and right spacing portions are formed at the rear end portions of the left and right main frames (103), so that the planting devices (20a, 20b), the control member, and the cable are formed in accordance with the left and right spacing portions. Etc. can be arranged freely, which improves the degree of freedom in aircraft design.

Further, by fitting the rear ends of the left and right main frames (103) within the left and right widths of the seedling supply device (43), the left and right widths of the rear portion of the machine body can be made compact.
Further, the front part of the main frame (103) is attached to the axle cover (101) connected to the transmission case (38) , and the rear part is connected to both the left and right sides of the handle frame (104) to form a square shape in a plan view. Is formed, so that the strength of the aircraft can be improved.

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Further, according to the first related invention, in addition to the effect of the invention of claim 1, by bending each part of the main frame (103), the transmission case (38) is rotated up and down to move the traveling device (44) up and down. Since it does not interfere with the main frame (103) even if the position is changed, the adjustment range of the vehicle height of the traveling vehicle body (40) is secured.

According to the second related invention, in addition to the effects of the first and the first related inventions, the transmission case (26) is provided with the supply support frame (107) of the seedling supply device (43), thereby increasing the strength. Since the high transmission case (26) can be used as a support frame, sufficient aircraft strength can be ensured even if the number of parts is reduced.

According to the third related invention, in addition to the effects of the first and second related inventions, the front end portion of the bumper (109) is located in front of the front end portion of the front boarding step (113). As a result, the bumper (109) comes into contact with the obstacle first, so that the front boarding step (113) is prevented from being damaged and it is prevented that it becomes difficult to get on and off.

According to the fourth related invention, in addition to the effect of the third related invention, the bumper (109) is firmly supported by mounting the bumper support frame (108) on the mission case (39), so that the bumper (109) can be firmly supported. 109) is less likely to be damaged during contact.

Further, by making the bumper support frame (108) not in contact with the engine (41), it is possible to prevent the impact and distortion due to the contact of the bumper (109) from being transmitted to the engine (41), and the engine (41) is damaged. Is prevented.

Left side view of the transplant machine Right side view of the transplant machine Rear view of the transplant machine Front view of the transplant machine Top view of the transplanter Bottom view of the transplant machine Top view of the transplant machine with a part of the structure on the running body removed Top view of the transplant machine with a part of the structure on the running body removed Perspective view of the transplant machine with a part of the structure on the running body removed Perspective view of the transplant machine with a part of the structure on the traveling vehicle body removed. Top view showing the area around the bumper on the front side of the aircraft Side view of the main part showing the periphery of the bumper on the front side of the aircraft Perspective view of the main part showing the periphery of the bumper on the front side of the aircraft Side view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Top view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Rear view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Perspective view showing the elevating mechanism and the inter-row adjustment mechanism of the left and right planting hoppers Rear view showing the main part of the opening and closing mechanism of the planting hopper (A) Rear view of the main part showing the interstitial adjustment plate, (b) Front view of the main part showing the interstitial adjustment plate. (A) Side view of the main part showing the hydraulic cylinder for raising and lowering and the contraction regulation arm, (b) Side view of the main part showing the contraction regulation arm, (c) Rear view of the main part showing the contraction regulation arm. Rear view of the main part showing the lifting hydraulic cylinder and the contraction control arm Top view showing a star foil that guides the seedling container with an arc Side view showing a star foil that guides the seedling container with an arc A perspective view of a main part showing the usage state of a work seat equipped with a seat suspension mechanism. A perspective view of a main part showing a non-use state of a work seat equipped with a seat suspension mechanism. (A) Side view of the main part showing the seating sensor in the non-detected state, (b) Side view of the main part showing the seating sensor in the detected state. Side view of the main part of the transplant machine equipped with an irrigation pump and a check valve

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a left side view showing a transplanting machine 10 for transplanting onion seedlings as an example of the transplanting machine according to the embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is a rear view, and FIG. 4 is a front view. , FIG. 5 is a plan view, and FIG. 6 is a bottom view.

In the following description, the side on which the steering wheel 47 is arranged is the rear side, and the opposite side, that is, the side on which the engine 41 is arranged is the front side. Then, the right-hand side is the right and the left-hand side is the left when facing the front side of the aircraft.

As shown in FIGS. 1 to 6, the transplanting machine 10 of the present embodiment has a traveling vehicle body 40 capable of traveling forward, a steering handle 47 for walking maneuvering provided at the rear of the traveling vehicle body 40, and a field. A planting device 42 for planting seedlings and a seedling supply device 43 for supplying seedlings to the planting device 42 are provided.

The traveling vehicle body 40 is provided with a mission case 39 at the front portion of the machine body, and an engine 41 serving as a drive source is provided at the front side of the mission case 39. Axle covers 101 covering the axles that can adjust the tread to change the left and right positions of the rear wheels 44 are connected to the lower rear parts of the fuselage on both the left and right sides of the mission case 39, and are connected to the outer ends of the fuselage of the axle covers 101. Is equipped with a traveling transmission case 38 for transmitting a driving force to a rear wheel 44 provided on the rear side of the machine body so as to be rotatable up and down.

The left and right rear wheels 44 are arranged between the traveling transmission case 38 and the left and right sides of the main frame 103, which will be described later, to suppress the left-right width of the airframe. However, if the left and right rear wheels 44 can be mounted on the outside of the machine body of the traveling transmission case 38 in order to meet the conditions such as the width of the ridges for planting the seedlings, the work conditions that can be handled can be increased. ..

More precisely, the left and right axle covers 101 are rotatably mounted with the internal axle (not shown) as a fulcrum, and the traveling transmission case 38 is mounted on each of these axle covers 101. The axle cover 101 rotates due to the expansion and contraction of the rolling cylinder 310, so that the traveling transmission case 38 rotates up and down.

Then, as shown in FIGS. 6 to 10, L-shaped connecting stays 102 are provided on the rear upper portion of the left and right axle covers 101 in a plan view, and the front and rear connecting stays 102 are provided on the rear side of the fuselage. The front ends of the main frame 103 whose direction is the longitudinal direction are connected to each other. The mounting positions of the left and right main frames 103 are inside the machine body with respect to the traveling transmission case 38.

As shown in FIGS. 5 to 8, the left and right main frames 103 are arranged linearly in the front-rear direction of the fuselage. Bend in an inclined posture toward the outside of the machine and above the body, that is, toward the outside of the machine, between the front and rear positions of the hoppers 20a and 20b on the front side of the machine. Further, the main frame 103 is bent toward the rear side of the machine body at a position below both the left and right outer sides of the seedling supply device 43, which will be described later. As a result, the left-right width on the rear end side is wider than the left-right width on the front end side of the left and right main frames 103.

Then, as shown in FIGS. 3, 6 to 8, an operator stands at the rear end of the left and right main frames 103 and pushes down the rear end of the machine body during turning, storage work, etc. A control handle 47 for operating the traveling direction of the airframe is attached to the left and right ends of the handle frame 104 in the left-right direction.

As described above, by arranging the left and right main frames 103 with a space between the left and right sides, the constituent members are arranged in the left and right space portions of the main frames 103, and it is difficult for the main frame 103 to divide the arrangement position of the members. Since it is configured, the degree of freedom in design is high.

Further, the main frame 103 is bent toward the outside of the machine body and upward at a position rearward from the front-rear central portion of the rear wheel 44 and at a position on the front side of the planting hoppers 20a and 20b. The bent portion is separated upward from the rear side, which has a large amount of vertical movement when the traveling transmission case 38 rotates, and is also largely separated from the rear wheel 44, so that the main frame 103 hinders the change in vehicle height. Is prevented.

In addition, the bent portion of the main frame 103 to the rear side of the machine body is configured to pass below the left and right sides of the seedling supply device 43, thereby accommodating the introduced seedlings and the predetermined drop position. It is possible to prevent the main frame 103 from hindering the movement of the plurality of seedling accommodating bodies 22 to be transported to.

Then, the front ends of the left and right main frames 103 are connected to the axle cover 101 via the connecting stay 102, and the left and right rear ends are connected to the handle frame 104, whereby the frame structure of the transplanter is quadrangular. Since it can be configured in a frame shape, the strength of the aircraft can be improved.

As shown in FIGS. 7 and 8, of the left and right main frames 103, mounting support plates 105 that are in a rearwardly inclined posture are provided on both the left and right sides of the machine body and on the front side of the machine body from the upwardly bent portion. Beam frames 106f and 106r are mounted between the left and right sides of the mounting support plate 105 at predetermined intervals in the front-rear direction. Of the front and rear beam frames 106f and 106r, the rear beam frame 106r located on the rear side of the airframe is arranged above the airframe above the front beam frame 106f.

The seedlings put into the seedling container 22 by the operator are placed at a predetermined position in the left and right center portions of the front and rear beam frames 106f and 106r, that is, in the vicinity of the intermediate positions in the left and right directions between the left and right center of the machine body and the left and right main frames 103. A supply support frame 107 is provided to support the seedling supply device 43 that is conveyed and supplied to the left and right planting hoppers 20a and 20b from below.

Then, at the lower part of the left and right supply support frames 107, a transmission case 26 that receives a driving force from the mission case 39 and transmits the driving force to the seedling supply device 43 and the vertical movement mechanism 21 of the left and right planting hoppers 20a and 20b. The lower ends of the left and right supply support frames 107 are attached to the upper side surfaces of the transmission case 26 and the front and rear beam frames 106f and 106r.

The left and right supply support frames 107 are L-shaped plates when viewed from the side, and the rear side of the machine body whose longitudinal direction is the vertical direction is bent toward the inside of the machine body.

With the above configuration, the transmission case 26, which has a strong structure for incorporating the transmission system, can be used as a support member for the left and right supply support frames 107, and thus deforms under the load of the seedling supply device 43. , It is prevented that the seedling supply device 43 is tilted and the seedlings cannot be supplied.

Further, on the front side of the machine body and on both the left and right sides of the mission case 39, a U-shaped bumper support frame 108 is provided so as to project toward the front side of the machine body in a front cross-sectional view. Then, in front of the left and right bumper support frames 108, bumpers 109 projecting to the front side of the machine body are provided.

As shown in FIGS. 11 to 13, the bumper 109 includes a bumper plate 109a in which the front side and the left and right sides of the plate body are bent downward, a front weight 109b that can be attached to and detached from the upper surface of the bumper plate 109a, and a bumper plate. It is composed of a bumper rod 109c extending in the left-right direction from 109a. The front weight 109b is made of a mass of a relatively heavy and hard material such as iron, and has a shape protruding toward the front side of the machine body from the bumper plate 109a.

As a result, the front weight 109b, which is a mass having weight and hardness, protrudes most forward of the machine body, so that it is possible to prevent damage to the bumper plate 109a when it comes into contact with an obstacle.

The left and right bumper support frames 108 are formed on the front side of the fuselage and on the lower side of the fuselage with recesses (not shown) having openings on the lower side of the fuselage. Insert the frame 110 and fix it.

By providing the front beam frame 110, the left and right bumper support frames 108 and the mission case 39 can be assembled into a quadrangular frame on the front side of the machine body, so that the strength of the front side of the machine body is improved. In particular, when the bumper 109 comes into contact with an obstacle, the left and right bumper support frames 108 are inserted and fixed to the front beam frame 110, so that damage or impact is unlikely to propagate to the rear side of the left and right bumper support frames 108. Become.

Further, when assembling the mission case 39 to the airframe, the recesses of the left and right bumper support frames 108 are inserted into the front beam frame 110 and then moved in the left-right direction to fix the front-rear position of the mission case 39 and then to the left-right position. Is adjustable, so that the assembly work is prevented from being delayed due to the deviation of the mounting position of the mission case 39.

As shown in FIGS. 7 and 8, the rear portion of the engine 41 is loaded on the front side of the mission case 39 and on the left and right sides, and the front portion of the engine 41 is located near the left and right center portions of the front beam frame 110. It is configured to be loaded on the engine mount to be arranged, but the bumper support frame 108 and the engine 41 on the side where the engine 41 is arranged are arranged so as to be spaced apart in the vertical direction. That is, the bumper support frame 108 is not a member that receives the engine 41 from below.

With the above configuration, it is possible to prevent the impact when the bumper 109 comes into contact with an obstacle from propagating from the bumper support frame 108 to the engine 41, thereby preventing the engine 41 from being damaged or causing malfunction due to the impact. can.

Further, even if the bumper support frame 108 is deformed by an impact, the load state of the engine 41 is not easily affected, and even if the bumper 109 is damaged, the work or movement can be performed by the power of the engine 41.

Then, as shown in FIGS. 11 to 13, step support plates 111 having recesses in the left-right direction for mounting the bumper rod 109c are mounted on the left and right sides of the bumper plate 109a, respectively. The left and right step support plates 111 are supported via reinforcing arms 112 provided on the rear side of the front beam frame 110 and on both the left and right sides, respectively. The upper surfaces of the left and right step support plates 111 are flat, and front boarding steps 113 on which the operator puts his / her feet when getting on and off from the front side of the machine body are mounted therein.

The left and right front boarding steps 113 have a configuration in which a plurality of plate bodies are arranged in a trapezoidal frame to form large and small spaces, and are attached to the sole of the shoe when the operator puts his / her foot on it. It drops the existing soil downward. When unevenness is formed on the upper surface of the plate body, the convex portion easily comes into contact with the groove of the sole, and the soil removing effect is improved.

As a result, it becomes difficult for soil to be brought onto the machine body, so that the labor required for soil removal work can be reduced.

As described above, since the front boarding step 113 is formed with a plurality of space portions, it has a structure in which deformation is likely to occur when it comes into contact with an obstacle. The bumper 109 tends to come into contact with obstacles first. This prevents damage to the front boarding step 113.

Since it is necessary for the operator to pass through the left and right sides of the engine 41 and the mission case 39 when getting on and off from the front side of the traveling vehicle body 40, it is necessary to provide a step as a scaffold. However, since the mission case 39 is arranged below the engine 41, if the steps are common to the left and right, one step interferes with the mission case 39 and cannot be attached.

Therefore, the front step 114R on the side where the engine 41 is provided unevenly is placed on a flat plate so as to be inserted between the engine 41 and the upper and lower bumper support frames 108 on the left and right sides. On the other hand, in the front step 114L provided on the side opposite to the engine 41, a notch 114La for exposing the mission case 39 is formed to cover the bumper support frame 108 on the left and right sides.

As a result, since the left and right front side steps 114L and 114R can be mounted, the operator can get on and off on the side where it is easy to get on and off, so that the work efficiency is improved.

Further, since the notch 114La is not formed on the side where the engine 41 is biased, a wide foothold can be secured and the strength of the front side 114R on the right side can be improved.

In the left and right front steps 114L and 114R, one plate is bent, and the left and right front boarding steps 113 are rearward with the left and right front boarding steps 113, and the lower step 115 and the lower step 115 are in a substantially horizontal posture. Each has an upward tilting step 116 that is bent rearward and upward, and an upper step 117 that is formed by bending the rising tilting step 116 so as to be in a posture parallel to the lower step 115. If notches are formed in the rising inclined step 116 and the upper step 117, respectively, a space for moving hands and tools during maintenance work of the mission case 39 and its surroundings is widened, and work efficiency is improved.

Then, on the left and right upper steps 117 and on the front side of the machine body from the rear upper bending part of the left and right main frames 103, a worker gets on and off from the side of the machine body, and side step 118 which serves as a scaffolding during work is provided. Provide each. In the side step 118, plate bodies are arranged vertically and horizontally in the frame to form a plurality of space portions, and the soil adhering to the sole of the worker is dropped downward.

A central step 119, which serves as a scaffold for the worker to be boarded, is detachably provided between the left and right sides of the left and right side steps 118. As shown in FIGS. 8 and 10, front and rear reinforcing beam frames 120f and 120r are provided below the central step 119 and between the left and right main frames 103 at front and rear intervals. The bolts for fixing the front and rear reinforcing beam frames 120f and 120r have a length that does not come into contact with the lower surface of the central step 119 or are not exposed from the upper surface of the central step 119. When each is attached, the bolt does not interfere with the movement of the worker's foot on the central step 119, and the work efficiency is improved.

As described above, the floor step 122 is configured.

The left and right front side steps 114L and 114R, the left and right side step 118, and the center step 119 are mounted independently, that is, they are not fastened together with one mounting member (bolt or the like). As a result, when removing each step structure during partial maintenance work, it is not necessary to remove another step structure, and the efficiency of maintenance work is improved.

Further, by arranging the front and rear reinforcing beam frames 120f and 120r at a space between the front and rear, the hydraulic cylinder 300 for raising and lowering, which will be described later, and the hydraulic balance of the rolling mechanism that makes the planting posture horizontal according to the left-right inclination of the field scene. Since the maintenance work of the 303 can be easily performed from the traveling vehicle body 40, the work efficiency is improved.

Further, on both the left and right sides of the traveling vehicle body 40 on the front side of the fuselage, and on the front side of the fuselage with respect to the rear wheels 44, the vehicle rolls via a horizontal frame 16 provided on the lower side of the front beam frame 110 and projecting in the left-right direction of the fuselage. A front wheel 45 that is movably supported is provided.

Then, the tip of the wheel drive shaft extending outward from the mission case 39 to the left and right sides enters the rotation axis position of the front portion of the traveling transmission case 38, and the traveling unit system shift in the transmission case 39. The power for traveling through the transmission unit is transmitted to the transmission mechanism in the traveling transmission case 38. Then, the power for traveling is transmitted to the rear wheel axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheels 44 are driven and rotated.

The left and right side clutches (not shown) provided in the mission case 39 can disconnect the left and right rear wheels 44. Therefore, when the airframe is turned, the side clutch is used to bring the left and right rear wheels 44, which are inside the turn, into a non-driving state so that the machine can turn smoothly.

Further, the traveling transmission case 38 is connected to a driving means that rotates up and down to move the rear wheel 44 up and down with the front side of the traveling transmission case 38 as a rotation fulcrum. Specifically, an arm 13 extending upward is integrally attached to the attachment portion of the traveling transmission case 38 to the mission case 39, and the lifting hydraulic cylinder 300 in which the arm 13 is fixed to the mission case 39. It is connected to the left and right sides of the connecting body attached to the tip of the piston rod. One left and right side (right side) is connected by a connecting rod, and the other side (left side) is connected by a left and right horizontal control hydraulic cylinder that can be expanded and contracted in response to the inclination of the machine body.

When the lifting hydraulic cylinder 300 operates and its piston rod protrudes to the rear of the machine body, the left and right arms 13 rotate backward, and the traveling transmission case 38 rotates downward accordingly to raise the machine body. On the contrary, when the piston rod of the lifting hydraulic cylinder 300 moves to the front of the machine body and retracts into the cylinder, the left and right arms 13 rotate forward, and the traveling transmission case 38 rotates upward accordingly. The aircraft descends.

The lifting hydraulic cylinder 300 is operated by a ridge surface sensor 14 that touches the ridge surface and operates as the vertical distance between the machine body and the ridge surface fluctuates. The operation of the ridge surface sensor 14 is an operation of detecting the height of the upper surface of the ridge based on the position of the machine body, and the height of the machine body is set according to the height of the upper surface of the ridge based on the detection operation of the ridge surface sensor 14. The structure is such that the lifting hydraulic cylinder 300 operates.

Further, when the left-right horizontal control hydraulic cylinder expands and contracts, the left arm 13 connected to the left-right horizontal control hydraulic cylinder rotates to move only the left rear wheel 44 up and down to tilt the airframe left and right. .. The left-right horizontal control hydraulic cylinder is configured to operate based on the detection result of a sensor that detects the left-right tilt of the machine with respect to the left-right horizontal to make the machine horizontal.

The lifting hydraulic cylinder 300 expands and contracts by detection by the ridge sensor 14 or by operating a vehicle height adjusting lever 123 provided at the rear of the machine body to change the vehicle height. However, if the vehicle is stopped for a long time, the load due to the weight of the machine body is applied to the elevating hydraulic cylinder 300, and the hydraulic oil naturally leaks, so that the elevating hydraulic cylinder 300 contracts and the vehicle height becomes low. Sometimes.

In particular, if the vehicle height is lowered during storage in a warehouse or the like where the aircraft is stopped for a long period of time, the lower ends of the ridge sensor 14 and the planting hoppers 20a and 20b may come into contact with the floor surface and be deformed. , There is a risk of damaging the floor surface. In addition, after a long break due to meals or the like, it may be necessary to readjust the vehicle height, which may reduce the work efficiency or cause the planting depth to become uneven due to an adjustment error.

As shown in FIGS. 20 and 21, the lifting hydraulic cylinder 300 includes a fixed cylinder case 301, a hydraulic balance 303 that is installed in the fixed cylinder case 301 and slides, and a hydraulic balance 303 that supports the end of the sliding rod 302. The sliding rod 302 is composed of a spring 304 that biases the sliding rod 302 on the extension side, that is, in a direction that raises the vehicle height of the traveling vehicle body 40, and an arc-shaped spring cap 305 that regulates extension is provided at one end of the spring 304. prepare.

Then, on the upper side of the hydraulic balance 303, a contraction regulating arm 306 that can be switched between a regulated state and a non-regulated state by a rotation operation is rotatably provided, and when the contraction regulating arm 306 rotates to the regulated state side. The end of the shrinkage control arm 306 comes into contact with the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, so that the sliding rod 302 cannot physically move in the contraction direction.

As shown in, the contraction regulating arm 306 is attached to the hydraulic balance 303 via a torque spring 307 on the base side, and is in contact with the end side so as to cover the outer periphery of the sliding rod 302 to be a fixed cylinder case. A regulation spacer 308 that enters between the front and rear of the 301 and the hydraulic balance 303, and a regulation holder 309 that engages with the outer peripheral surface of the fixed cylinder case 301 in front of the spring 304 are provided.

As shown in FIG. 20 (c), the regulation spacer 308 has a U-shape in front view so as to be surely in contact with the outer circumference of the spare sliding rod 302, and the regulation holder 309 is attached to the fixed cylinder case 301. It is assumed that an arc-shaped notch is formed so as to mesh with each other. Further, the contact surfaces of the regulation spacer 308 and the regulation holder 309 may be coated with a soft material such as rubber in order to prevent the lifting hydraulic cylinder 300 from being scratched.

The torque spring 307 urges the contraction regulating arm 306 to the non-regulated state side, and in the non-regulated state, the position where the regulated spacer 308 and the regulated holder 309 completely retract from the expansion / contraction range of the lifting hydraulic cylinder 300. The contraction control arm 306 is configured to rotate.

Switching between the regulated state and the non-regulated state of the contraction regulating arm 306 may be performed from above the floor step 122 of the traveling vehicle body 40 by providing a dedicated manual operation lever, but the lifting hydraulic cylinder 300 is the traveling vehicle body 40. Since it is located near the center of the aircraft in the front-rear direction, it is necessary to project the manual operation lever from the upper surface of the floor step 122. If the manual operation lever protrudes from the floor step 122, it may hinder the movement of the operator, and the operator's feet come into contact with each other to unintentionally switch between the regulated state and the unregulated state, resulting in ridges. Even if the surface sensor 14 detects that the field height has become low, the lifting hydraulic cylinder 300 cannot contract, and the planting depth may become shallow.

Further, since it is necessary to operate the manual operation lever on the traveling vehicle body 40 after adjusting the vehicle height, the work man-hours will increase.

In order to prevent the occurrence of these problems, the switching operation of the contraction control arm 306 is performed by expanding and contracting the lifting hydraulic cylinder 300 provided on the control panel 47a at the left and right center of the control handle 47 of the traveling vehicle body 40. A linking wire 124 is provided on the vehicle height adjusting lever 123 that adjusts the vehicle height of the vehicle body 40, and is configured to be performed in conjunction with the operation of the vehicle height adjusting lever 123.

The vehicle height adjusting lever 123 has a "high" position for raising the vehicle height on the front side of the machine body and a "low" position for lowering the vehicle height on the rear side of the machine body, and moves up and down from the "low" position toward the outside of the machine body. It has a "fixed" position that stops the expansion and contraction of the hydraulic cylinder 300 for maintaining the vehicle height. When the vehicle height adjusting lever 123 is operated in the "fixed" position, the linking wire 124 rotates the contraction regulating arm 306 toward the regulated state side. On the other hand, when the vehicle height adjusting lever 123 is moved from the "fixed" position and the linking wire 124 is loosened, the contraction regulating arm 306 is rotated to the non-regulated state side by the urging force of the torque spring 307.

With the above configuration, when the contraction regulating arm 306 is operated in the regulated state, the regulating spacer 308 enters between the front and rear of the fixed cylinder case 301 and the hydraulic balance 303, and the lifting hydraulic cylinder 300 cannot contract. The vehicle height is prevented from dropping due to its own weight.

As a result, the work of readjusting the vehicle height becomes unnecessary, the work efficiency is improved, and the planting hoppers 20a and 20b and the ridge sensor 14 are prevented from being pressed against the floor surface and deformed.

Further, when the regulation holder 309 bites into the fixed cylinder case 301, it is possible to prevent the contact position of the contraction regulation arm 306 from shifting and the elevating hydraulic cylinder 300 from being maintained in a contractable state.

Further, since the contraction regulating arm 306 is switched between the regulated state and the non-regulated state in conjunction with the operation of the vehicle height adjusting lever 123 at the rear of the traveling vehicle body 40, it is not necessary to separately provide an operating member for the contraction regulating arm 306. The number will be reduced.

Alternatively, since the operating member of the contraction regulating arm 306 does not protrude from the upper surface of the floor step 122 and the regulated state and the non-regulated state are prevented from being unintentionally switched, the planting is performed according to the unevenness of the ridge surface. Seedlings can be planted at a depth.

Further, since the linking wire 124 has a configuration in which the contraction regulating arm 306 is switched only to the regulated state side, the torque spring is generated when the linking wire 124 is broken or damaged such as excessively extending and bending. Since the contraction regulating arm 306 is rotated to the non-regulated state side by the urging force of 307, it is not necessary to rotate the contraction regulating arm 306 sandwiched between the fixed cylinder case 301 and the hydraulic balance 303 at the time of repair. , The labor required for repair work can be reduced.

In the above configuration, the contraction regulating arm 306 is rotated to the regulated state by the cooperation wire 124 and is rotated to the non-regulated state by the torque spring 307, but is rotated to the regulated state by the torque spring 307. , It may be configured to rotate in an unregulated state by the cooperation wire 124.

Specifically, when the vehicle height adjusting lever 123 is in the "high" position or the "low" position, the linking wire 124 rotates the contraction restricting arm 306 to the non-regulated state side and operates it in the "fixed" position. Then, the linking wire 124 is loosened, and the contraction regulating arm 306 is configured to rotate to the regulated state side by the urging force of the torque spring 307.

In the above configuration, when the linking wire 124 is loosened by operating the vehicle height adjusting lever 123 to the "fixed" position, the contraction regulating arm 306 is immediately rotated to the regulated state side by the urging force of the torque spring 307. Since the amount of contraction of the lifting hydraulic cylinder 300 by operating the high adjustment lever 123 can be suppressed to a smaller size, the vehicle height can be maintained more reliably.

As shown in FIGS. 1, 2 and 5, the horizontal frame 16 is rotatably mounted on the front beam frame 110 at the center of the axis in the front-rear direction, and is mounted on both left and right sides of the horizontal frame 16. , A vertical frame 17 that is long vertically is attached. The left and right front wheels 45 are rotatably attached to the front wheel axle 18 fixed to the lower end side of the vertical frame 17. Therefore, the left and right front wheels 45 are movable around the axis in the front-rear direction at the center of the left and right sides of the airframe. Further, the vertical frame 17 is provided so as to be vertically adjustable based on the left and right side portions of the horizontal frame 16, so that the height of the front wheel 45 can be adjusted.

The steering handle 47 is provided at the rear portion of the fuselage, and is located on the rear side of the fuselage with respect to the rear wheel axle 12 of the rear wheels 44. Specifically, it is attached to the rear end of the airframe frame 19 whose front end is fixed to the mission case 39.

The airframe frame 19 extends rearward at the center of the left and right sides of the airframe, and extends diagonally rearward and upward from the front-rear intermediate portion.

The steering handle 47 extends rearward to the left and right from the rear end of the fuselage frame 19, and each rear end thereof serves as a grip portion of the steering handle 47.

Although the grip portion is divided into left and right in FIG. 2, the left and right rear end portions of the steering handle 47 may be connected to each other on the left and right, and the connected portion may be used as the grip portion.

The planting device 42 raises and lowers a plurality of beak-shaped planting tools whose tips point downward, and a position where the lower end of the planting tool is above the field scene and a position below the field scene. The vertical movement mechanism 21 to move, the closed state where the lower end of the beak-shaped planting tool is closed and the seedlings can be received from above and the seedlings can be stored inside, and the lower end of the planting tool opens to the left and right to be stored inside. It is equipped with an opening / closing mechanism that opens and closes the planting tool in an open state that allows the seedlings to be released downward.

As shown in FIGS. 1 to 6, the planting device 42 of the present embodiment has a two-row planting configuration in which the first planting hopper 20a and the second planting hopper 20b are arranged side by side. The first planting hopper 20a and the second planting hopper 20b are respectively mounted on the vertical movement mechanisms 21 provided on the left and right side portions of the transmission case 26 transmitted from the mission case 39.

The vertical movement mechanism 21 is composed of a pair of upper and lower link arms 21a and 21b, and the upper and lower link arms 21a and 21b are attached to the transmission case 26 so as to be vertically rotatable, and the rear ends of the upper and lower link arms 21a and 21b. The part side is mounted between the left and right link holders 210 and 210 so as to be rotatable up and down. The front end of the upper link arm 21a is provided at a position separated from the rotation axis of the non-circular cam 211 rotatably mounted on the transmission case 26 toward the outer peripheral edge side, and the planting hopper 20a is moved up and down by the vertical movement mechanism 21. , 20b is configured to swing from front to back.

The transmission case 26 is fixed to the upper part of the mounting member whose lower part is fixed to the airframe frame 19. Further, the rear end side of the planting hoppers 20a and 20b and the vertical movement mechanism 21 are located on the rear side of the machine body with respect to the rear end parts of the left and right rear wheels 44 and 44 in a side view, and are located on the outer side of each machine body. Is a space without other members.

In particular, the position where the front end portion of the upper link arm 21a is attached to the non-circular cam 211 is such that the planting hopper 20a, 20a, 20b is set to a position where the posture changes from the backward leaning posture to a posture substantially perpendicular to the field scene, and when the posture starts to rise from the bottom dead center, the posture changes from the vertical posture to the forward leaning posture.

As a result, in the movement trajectory of the planting hoppers 20a and 20b, the time and distance for entering the soil for planting seedlings can be shortened, so that the size of the planting holes formed by the planting hoppers 20a and 20b in the field can be reduced. Since it is kept small, it is possible to prevent the seedlings from falling over and disturbing the planting posture.

Further, since the planting hoppers 20a and 20b are in a posture of being greatly tilted forward near the top dead center / BR> T, the seedlings to be thrown by the operator are transported to a predetermined position and dropped and supplied by the seedling supply device 43. Since the upper ends of the planting hoppers 20a and 20b can be brought close to the positions, seedlings are not supplied into the planting hoppers 20a and 20b, and stock shortages are prevented.

Then, since the planting hoppers 20a and 20b are in an inclined posture when the seedlings are dropped and supplied, the seedlings that have entered the planting hoppers 20a and 20b are slid and moved from the upper side to the lower side. Therefore, the seedlings stay in the planting hoppers 20a and 20b, and even if the planting hoppers 20a and 20b enter the soil, the seedlings are not planted and the stock shortage is prevented.

An adjustment plate 212 having a plurality of adjustment elongated holes 212a ... on a plurality of arcs is arranged between the non-circular cam 211 and the upper link arm 21a, and a fixing member such as a bolt is inserted into the adjustment elongated holes 212a. By changing the position, the planting hoppers 20a and 20b intended by the operator can be adjusted to the front-rear tilt angle.

As a result, the anteroposterior inclination angle of the planting hoppers 20a and 20b can be appropriately adjusted according to the working conditions such as the length and planting depth of the seedlings, so that the seedlings can be planted in a posture and planting depth suitable for growth. , The growth of seedlings becomes good.

The elevating drive force of the vertical movement mechanism 21 is transmitted from the elevating drive shaft 213 provided on the rear side of the machine body with respect to the rotation shaft of the non-circular cam 211. An unequal circular elevating cam 214 is mounted on the elevating drive shaft 213, and an elevating crank 215 for vertically rotating the upper link arm 21a is provided between the elevating cam 214 and the upper link arm 21a. The lower link arm 21b rotates up and down in conjunction with the up and down rotation of the upper link arm 21a, and the vertical movement mechanism 21 is a parallel link.

One end of the elevating crank 215 is attached to a rotating shaft from the elevating cam 214 to the outside of the machine body, and the other end is attached to a connecting plate 216 provided inside the machine body of the upper link arm 21a, and the loci of the planting hoppers 20a and 20b. Is suitable for planting seedlings and receiving seedlings from the seedling supply device 43.

The connecting plate 216 is projected from the upper link arm 21a toward the lower side of the machine body, and the lower end portion is arranged so as to be slightly above the upper end portion or the upper end portion of the lower link arm 21b, and the lower end portion of the connecting plate 216 is arranged. The other end of the elevating crank 215 is mounted near the portion.

With the above configuration, the elevating crank 215 can be arranged closer to the lower part of the machine body, so that the center of gravity is closer to the lower part of the machine body, so that the machine body is less likely to tilt back and forth due to the weight of the members, etc. Stabilize.

Further, by mounting the other end of the elevating crank 215 on the connecting plate 216, the upper link arm 21a is configured not to receive a direct load from the elevating crank 215, so that the durability of the upper link arm 21a can be improved. ..

As described above, since the load applied by the elevating operation is small, the upper and lower link arms 21a and 21b may be formed of a square pipe having a hollow inside. If the upper and lower link arms 21a and 21b are lightweight, the load transmitted to the transmission case 26 through the elevating crank 215 and the elevating cam 214 is reduced, so that the durability of the transmission case 26 is also improved.

In addition, the ascending speed does not become too slow or the descending speed does not become too fast due to the weight, the ascending / descending locus of the planting hoppers 20a and 20b is stable, and the planting posture and planting depth of the seedlings are stable. Growth becomes good.

Further, by arranging the elevating cam 214, the elevating crank 215, and the connecting plate 216 between the transmission case 26 and the vertical movement mechanism 21, the upper and lower link arms 21a and 21b do not interfere with each other during the vertical rotation. Both the upper and lower link arms 21a and 21b can be made linear, which makes it possible to simplify the configuration and maintain the strength.

In order to make the raising and lowering and tilting of the planting hoppers 20a and 20b more suitable for planting seedlings, the front-back lengths of the upper link arm 21a and the lower link arm 21b are different. In this case, the upper link arm 21a is shorter than the lower link arm 21b.

The rear ends of the upper and lower link arms 21a and 21b are attached to the left and right of the left and right link holders 210 and 210 with a vertical interval as described above. At this time, the attachment position of the upper link arm 21a is set to the lower side. It is positioned on the front side of the machine body from the mounting position of the link arm 21b.

As a result, when the planting hoppers 20a and 20b rise near the top dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a and 21b becomes longer, and the amount of forward and backward swing of the planting hoppers 20a and 20b becomes longer. Since the amount of seedlings can be kept small, the amount of the front-rear position on the upper side of the planting hoppers 20a and 20b is unlikely to change in the vicinity of the drop supply position of the seedling supply device 43, and the failure to receive the seedlings is reduced.

When the planting hoppers 20a and 20b rise near the bottom dead center, the distance between the fulcrums on the rear end side of the upper and lower link arms 21a and 21b becomes shorter, and the amount of forward and backward swing of the planting hoppers 20a and 20b increases. Since the size is increased, the planting hoppers 20a and 20b can be changed from the backward leaning posture to the forward leaning posture, and the planting hoppers 20a and 20b are prevented from coming into contact with the seedlings and being knocked down or damaged.

At the front end of the lower link arm 21b, an opening / closing arm 218 having an opening / closing wire 220 for operating an opening / closing mechanism for opening / closing the planting hoppers 20a and 20b according to an elevating position is attached to the upper end side so as to be rotatable back and forth. Attach to. A contact roller 219 is provided on the upper rear side of the opening / closing arm 218 to come into contact with the non-circular cam 211 when a portion having a diameter equal to or larger than a certain value passes through.

When the non-circular cam 211 comes into contact, the opening / closing arm 218 rotates forward and pulls the opening / closing wire 220 to close the planting hoppers 20a and 20b. The planting hoppers 20a and 20b are opened by moving and loosening the opening / closing wire 220.

The planting hoppers 20a and 20b open while the seedlings are planted and start to rise from the middle of the descent, and close when the seedlings are planted and start to rise and then the seedlings are received and descend again. The shape of the non-circular cam 211 corresponds.

Notches 221 are formed on the rear sides of the left and right hopper holders 210 and 210 in a U-shape that opens to the rear side of the machine body. It is assumed that the structure of the hopper holder 210 projects to the rear of the machine body at the upper part and the lower part of the notch portion 221.

Then, at the rear portions of the left and right hopper holders 210 and 210, U-shaped interstitial adjustment plates 222 shown in FIGS. 15 to 19 in which the front side of the machine body opens in a side view are provided. Left and right cut grooves 222b ... Are formed in the upper and lower front protrusions 222a of the inter-strip adjustment plate 222 with substantially the same left and right spacing as the left and right hopper holders 210 and 210, and the cut grooves 222b are formed. … Insert into the hopper holders 210 and 210, respectively, and attach them. At this time, a quadrangular adjustment space portion 223 is formed between the notch portion 221 and the front and rear of the interstitial adjustment plate 222 in a side view.

The interstitial adjustment plate 222 has a central portion on the left and right located behind the upper and lower link arms 21a and 21b constituting the vertical movement mechanism 21, and protrudes in the left-right direction to substantially the same length. On the wall surface of the above, interstitial adjustment elongated holes 224 are formed in the left-right direction.

A hopper holder 225 that supports the planting hoppers 20a and 20b on the rear side of the machine body is provided at the rear portion of the inter-strip adjustment plate 222. The hopper holder 225 is bent toward the front side of the machine body in an L shape to form a connecting portion 225a, and on both the left and right sides, the planting hoppers 20a and 20b and fastening members 209 such as bolts are provided so as to project toward the rear side of the machine body. The connecting portions 225b and 225b that are connected via each other are formed. Further, a plurality of mounting holes (not shown) for fastening members 209 such as bolts are formed in one or left and right directions on the wall surface in the vertical direction below the connecting portions 225a and above the connecting portions 225b and 225b. In the hopper holder 225, the L-shaped connecting portion 225a is aligned with the upper side and the rear side of the inter-row adjustment plate 222 in a side view, and the inter-row adjustment elongated hole 224 and the mounting hole are located at the same vertical height. Mounting. As a result, when the fastening member 209 is removed or loosened, the hopper holder 225 can slide in the left-right direction along the interstitial adjustment plate 222.

When adjusting the left and right planting intervals of the left and right planting hoppers 20a and 20b, that is, the inter-row spacing, remove or loosen the fastening member 209 as described above, and set the hopper holder 225 to any width within the left-right width of the inter-row adjustment plate 222. It is determined by moving to the position of and attaching or tightening the fastening member 209.

The fastening member 209 is inserted through the mounting hole of the hopper holder 225, and is screwed into or pulled out from the nut provided on the adjustment space portion 223 side so that the position can be switched between the fixed position state and the inter-row adjustment state.

In the above configuration, since the fastening member 209 is inserted in the interstitial adjustment elongated hole 224, the fastening member 209 serves as a stopper and the hopper holder 225 can be prevented from falling off from the left and right ends of the interstitial adjustment plate 222.

In the inter-row adjustment configuration of this case, which includes the left and right planting hoppers 20a and 20b, the inter-rows of the left and right planting hoppers 20a and 20b are the most interstitial because the left and right inter-row adjustment plates 222 and 222 can have a large left-right spacing. Even when the hopper holders 225 and 225 are narrowed, that is, when the inter-row adjustment plates 222 and 222 are moved to the inner end of the machine body, the left and right planting hoppers 20a and 20b are arranged so as not to interfere with each other. As a result, the space between the rows can be set narrower, so that it is possible to handle a wider variety of working conditions than before.

Further, since the interstitial adjustment plate 222 is provided at the rear part of the vertical movement mechanism 21, it is possible to prevent the interstitial adjustment plate 222 from hindering the left and right movement of the planting hoppers 20a and 20b. It is possible to set the inter-row spacing in a wider range over the width, and it is possible to correspond to a wider variety of working conditions.

Further, by forming the adjustment space portion 223 between the front and rear of the link holders 210 and 210 and the opening of the inter-strip adjustment plate 222, the operator can work on the rear side of the left and right rear wheels 44 and 44 and on the outside of the machine body. Since the work of tightening and loosening the nut can be performed in the space of the space, the inter-row adjustment work can be performed efficiently.

Assuming that the thickness of the nut is less than half the front-rear width of the adjustment space portion 223, a work space for inserting a tool for attaching / detaching the nut into the left-right center portion of the inter-strip adjustment plate 222, that is, behind the upper and lower link arms 21a and 21b. Is secured, so that there is no position where the planting hoppers 20a and 20b cannot be fixed within the left-right width of the inter-row adjustment plate 222, and the necessary inter-row setting becomes possible.

In the above inter-row adjustment mechanism, the left and right planting hoppers 20a and 20b are basically moved in symmetrical directions. For example, when the inter-row spacing is 70 cm, the left and right planting hoppers 20a and 20b are moved to the left and right outer ends of the inter-row adjustment plates 222 and 222, respectively, and when the inter-row spacing is 30 cm, the left and right planting hoppers are planted. The hoppers 20a and 20b are moved to the left and right inner ends of the interstitial adjustment plates 222 and 222, respectively. Other inter-rows are set by moving them to arbitrary positions within the left and right widths of the inter-row adjustment plates 222 and 222, but the operator should be able to visually understand how many cm the inter-rows are set. , Indicators may be provided on the interstitial adjustment plates 222 and 222. This indicator shall be affixed with a printed sticker, written on or engraved on the interstitial adjustment plate 222.

However, depending on the type of crop and the field environment, it is possible to plant more than two rows, for example four rows, in a wide ridge. When four rows are planted by reciprocating one ridge, both the left and right planting hoppers 20a and 20b are placed on the left and right sides of the inter-row adjustment plates 222 and 222 so that the planting position is offset to the left and right sides in the direction of travel of the ridges. It is possible to plant seedlings even if they are brought close to. This makes it possible to handle even more diverse working conditions.

The planting hoppers 20a and 20b cover the hopper cover 226 above the hopper holder 225 toward the rear side of the machine body, and cut out the upper surfaces on the rear side of the machine body and on both the left and right sides to form an open space portion. Left and right rotation support shafts 227 and 227 are provided between the front and rear walls of the rear side of the hopper holder 225 and the wall surface on the rear side of the hopper cover 226, respectively, and the rotation arms 227 and 227 are respectively provided with rotation arms. The 228 and 228 are rotatably mounted. Most of the left and right rotating arms 228 and 228 project upward from the open space portion.

The left and right rotary support shafts 227 and 227 are arranged below the notch 221 of the link holders 210 and 210 and the interstitial adjustment plate 222.

As a result, the rotary support shafts 227 and 227 on the hopper holder 225 side can be arranged on the lower side of the inter-strip adjustment plate 222 and without a large front-rear distance from the link holders 210 and 210, so that the planting hoppers 20a and 20b can be arranged. The front-rear position does not move too far behind, and a compact configuration can be achieved.

Of the rotating arms 228 and 228, the cable outer of the opening / closing wire 220 is attached to the outside of the machine body, the cable inner is connected to the inside of the machine body, and the left and right rotating arms 228 are pulled and loosened by the opening / closing wire 220. The configuration is such that the 228 rotates.

Further, on the left and right rotation support shafts 227 and 227, U-shaped opening / closing arms 230 and 230, which mount a pair of left and right hopper stays 229 and 229 on the lower side, are mounted so as to be rotatable left and right, respectively. The opening / closing arms 230, 230 have a shape that covers the front and rear and the upper side of the hopper stays 229, 229, and as shown in FIG. The portions 230a and 230a are formed, respectively. By engaging the gear portions 230a and 230a, the amount of rotation of the opening and closing arms 230 and 230 at the time of opening and closing is synchronized, and the opening degree is such that the seedlings can be opened evenly from the planting hoppers 20a and 20b.

Further, support pins 232 and 232 are provided on the left and right sides of the front and rear surfaces of the opening / closing arms 230 and 230, respectively, and the left and right opening / closing arms 230 and 230 are brought close to each other on the left and right support pins 232 and 232. The springs 233 for urging in the direction are arranged in the front and rear respectively.

Further, the hopper stays 229 and 229 connect the front and rear bent portions to the front and rear portions of the opening and closing arms 230 and 230, and a pair of left and right hopper constituents 231 and 231 are attached to the inner portions of each machine body at the bottom in the front and rear direction. A semi-circular notch (not shown) is formed. The left and right hopper configurations 231,231 are configured such that when they are opened, they open wider in the left-right direction toward the lower end side, and when they are closed, their end faces are substantially evenly contacted with each other over the top and bottom. Further, the vicinity of the lower end portion of the hopper components 231,231 is formed in a plate shape so as to reduce the resistance when entering the soil.

Further, the hopper cover 226 is formed with an opening (not shown) having a diameter substantially the same as that of the uppermost portions of the left and right hopper configurations 231 and 231 or a slightly smaller diameter (not shown), and the seedling supply device 43 supplies the opening to the opening. The seedling guide 234 that guides the seedlings to the inside of the left and right hopper components 231 and 231 is inserted and attached. The diameter of the left and right hopper components 231 and 231 near the upper end is larger than the diameter from the vicinity of the upper end to the lower side.

Of the seedling guides 234, the lower side of the hopper cover 226 has substantially the same diameter, and the upper side of the hopper cover 226 has a larger diameter toward the upper side of the machine body, and has a tapered shape in side view and rear view.

Since the upper end side of the seedling guide 234 has a tapered shape, the diameter on the upper end side is maximized, so that the seedlings can be received even if the position where the seedlings are dropped and supplied is slightly deviated, and the planting hoppers 20a and 20b are the seedlings. It is prevented from failing to plant.

Further, by making the diameter of the lower part of the seedling guide 234 substantially the same as the diameter of the upper end portion of the hopper constituents 231 and 231 or slightly smaller in diameter, the diameter between the seedling guide 234 and the hopper constituents 231,231 is set. Since there are no gaps, the seedlings can be taken over reliably and the seedlings can be planted reliably.

Each seedling container 22 has a tubular body that opens up and down and a bottom lid that opens and closes an opening on the lower side of the tubular body, and is connected to each other in a loop.

The moving mechanism 23 is a state in which each of the connected seedling accommodating bodies 22 passes in the upper vicinity of the left and right planting hoppers 20a and 20b, and the connected seedlings are formed by a long circular loop-shaped locus on the left and right in the plane view of the machine body. The accommodating body 22 is rotated counterclockwise.

The seedling dropping mechanism opens the bottom lid of the seedling accommodating body 22 at a position above the planting hoppers 20a and 20b corresponding to the seedling accommodating body 22.

In the present embodiment, a cylindrical outer peripheral portion is formed on the outer periphery of the seedling accommodating body 22, and an engaging portion (round hole) rotatably connected from the outside is provided on the cylindrical outer peripheral portion, and two seedling accommodating bodies 22 are provided. A plurality of connecting bodies for connecting the above were formed. Then, the engaging portion of the connecting body is rotatably connected to the outer peripheral portion of the cylinder of the seedling containing body 22, and the adjacent seedling containing body 22 is rotatably connected with the outer peripheral portion of the cylinder as the rotation axis. , A plurality of seedling accommodating bodies 22 are connected to each other. That is, the seedling accommodating body 22 and the connecting body are connected like an endless chain.

As a result, the seedling container 22 is left and right from the seedling container 22 because the distance between the linear portion 28 that moves linearly and the arc-shaped portion 29 that moves in an arc shape does not change from the adjacent seedling container 22. At the place where the seedlings are supplied to the planting hoppers 20a and 20b, the positional deviation of the left and right planting hoppers 20a and 20b of the seedling container 22 is less likely to occur, and the seedlings are properly supplied and the seedlings are properly supplied. Can be planted.

The moving mechanism 23 of the seedling supply device 43 winds the seedling accommodating bodies 22 connected to each other like an endless chain around the arcuate notches on the outer periphery of the sprockets provided on the left and right, and takes out the left and right sprockets from the transmission case 26. Each seedling accommodating body 22 is configured to rotate around the circumference by driving and rotating with the power of the seedlings.

The orbital movement path around which the seedling container 22 orbits is a length including a linear portion 28 extending in the left-right direction in a plan view and an arc-shaped portion 29 that bends in an arc shape from the linear portion 28 to the front side or the rear side by a sprocket. It is circular and is located inside the fuselage from the left and right rear wheels 44.

The seedling storage body 22 of the seedling supply device 43 moves in a predetermined direction relatively stably in the linear portion 28, but the distance between the seedling storage bodies 22 is narrowed or widened in the arc-shaped portions 29 on both the left and right sides. This may cause damage to the drive of the seedling supply device 43, or may cause the seedling drop supply timing to become unstable. In order to prevent this, star foils 240 and 240 that are driven and rotated are provided on the inner peripheral edges of the plurality of seedling accommodating bodies 22 and on the left and right outer portions of the seedling supply device 43, respectively. Protrusions are formed at equal intervals on the outer peripheral edge of the 240. By allowing these protrusions to enter the interval portion of the seedling container 22, the position of each seedling container 22 when passing through the arcuate portions 29 on both the left and right sides of the seedling supply device 43 is maintained, thereby overloading. It prevents the occurrence of seedlings and the deviation of the timing of dropping and supplying seedlings.

However, during the seedling planting operation, the protrusions of the star foil 240 are in constant contact with the seedling container 22, so that the shape of the protrusions tends to change due to wear and the protrusions tend to be damaged due to the accumulation of loads. If the deformed or damaged star foil 240 is used as it is, the transport interval of the seedling container 22 becomes unstable, the timing of dropping and supplying seedlings is disturbed, and the planting work may be hindered.

In order to solve this problem, as shown in FIGS. 22 and 23, a rotary support shaft 241 projecting downward is provided on each of the protrusions of the star foil 240, and the feed roller 242 can be rotated on the outer periphery of the rotary support shaft 241. Attach to.

As a result, the protrusions of the star foil 240 do not come into direct contact with the seedling container 22, so that deformation of the protrusions and accumulation of loads are less likely to occur, and the timing of dropping and supplying seedlings can be stabilized.

Further, by making the feed roller 242 in contact with the seedling container 22 rotatable, wear of the feed roller 242 is reduced, and an increase in the frequency of parts replacement is prevented.

By covering or coating the outer peripheral surface of the feed roller 242 with a coating member having a high coefficient of friction and elasticity such as rubber, the wear of the feed roller 242 can be further reduced, and the grip force is increased by the frictional force. Improvement is achieved, and the transportation of the seedling container 22 is stable.

Further, the left and right planting hoppers 20a and 20b are arranged on the rear side of the position of the rear wheel axle 12.

The seedling supply device 43 is configured such that the seedling accommodating body 22 orbits around in accordance with the left and right planting hoppers 20a and 20b to supply seedlings.

In the planting hoppers 20a and 20b, seedlings are dropped and supplied from the seedling container 22 at the first drop supply position 31a and the second drop supply position 31b, respectively.

Then, seedling accommodating bodies 22 for accommodating seedlings to be dropped and supplied corresponding to the left and right planting hoppers 20a and 20b are separately provided, and above the left and right planting hoppers 20a and 20b corresponding to the seedling accommodating bodies 22. The bottom lid opens only when it comes, and the bottom lid does not open above the left and right planting hoppers 20a and 20b that do not correspond to each other.

That is, the seedling container 22 corresponding to the planting hopper 20a arrives at the first drop supply position 31a only, and the seedling container 22 corresponding to the planting hopper 20b arrives at the second drop supply position 31b. The bottom lid is opened and seedlings are supplied to the corresponding planting hoppers 20a and 20b.

The first drop supply position 31a and the second drop supply position 31b are configured to be movable to the corresponding positions when the gaps between the left and right planting hoppers 20a and 20b are adjusted.

The operating cycle of the moving mechanism 23 is set to be synchronized with the operating cycle of the vertical moving mechanism 21, and the seedling accommodating bodies 22 corresponding to the left and right planting hoppers 20a and 20b are combined to form one seedling accommodating body unit. By connecting a plurality of the seedling storage units, the seedling storage 22 passes through the left and right drop supply positions 31a and 31b in series, and the seedlings are supplied corresponding to the left and right planting hoppers 20a and 20b. Seedlings can be supplied without leakage, and the seedling housings 22 for which seedlings were not supplied after passing through the left and right drop supply positions 31a and 31b are not generated. The structure is such that seedlings can be supplied accordingly.

In the transplanting machine 10 of the present embodiment, the soil covering suppression rings 37 used for soil covering suppression according to the seedlings planted by the left and right planting hoppers 20a and 20b are planted at the seedling planting points of the left and right planting hoppers 20a and 20b. It is provided near each of the rear left and right sides of. The left and right soil-covering compression wheels 37 are separately attached to support arms that can rotate up and down.

The left and right planting hoppers 20a and 20b can adjust the left and right positions according to the planting work conditions of the seedlings to change the line spacing, but the ridge sensor 14 is grounded according to the set line spacing. If the position is not changed, the detection accuracy may decrease.

As described above, the traveling vehicle body 40 has a configuration in which the left and right traveling transmission cases 38 are rotated up and down by the lifting hydraulic cylinder 300 to change the planting depth, but the left and right planting hoppers 20a and 20b Of the left and right traveling transmission cases 38, one of the left and right traveling transmission cases 38, in this case, the traveling transmission case 38 on the left side of the aircraft is rotated up and down separately in order to make the planting depth as appropriate as possible. ..

Specifically, a rolling cylinder 310 is arranged between the traveling transmission case 38 on the left side and the left end of the machine body of the hydraulic balance 303, and rolling is made according to the difference in the amount of vertical rotation of the soil covering compression wheels 37 on the left and right. The cylinder 310 is configured to expand or contract.

Since the rolling cylinder 310 is provided closer to the left side of the machine body, the ridge sensor 14 can easily balance the left and right sides of the machine body when detecting the front of the planting hopper 20b on the right side of the machine body.

Therefore, as shown in FIGS. 6 and 8, the ridge sensor 14 is attached to the adjusting base plate 14a provided on the bottom beam frame 133 provided below the left and right main frames 103 and to the adjusting base plate 14a in the left-right direction. It is composed of a grounding plate 14b provided so that the position can be adjusted.

An adjustment slot 14c in the left-right direction is formed on the rear side of the body of the adjustment base plate 14a, and the grounding plate 14b is positioned in the left-right direction along the adjustment slot 14c with a fixing member such as a bolt. By fixing it, the detection position of the ridge sensor 14 is set.

With the above configuration, the detection position of the ridge sensor 14 can be adjusted to an appropriate position according to the setting between the left and right planting hoppers 20a and 20b, so that automatic control of the planting depth according to the setting line is more appropriate. The planting accuracy of seedlings is improved.

The transplanting machine of this case is provided with a work seat 46 on which the worker sits so that the worker who replenishes the seedlings can get on the seedling supply device 43 to perform the seedling replenishment work. Specifically, the work seats 46 are arranged rearward at the center positions on the left and right sides of the machine body, which is the front side of the seedling supply device 43. The worker sitting on the work seat 46 sits in a rearward posture toward the front side of the seedling supply device 43, and has a linear shape on the front side of the seedling supply device 43, particularly on the front side in the orbital movement path of the seedling container 22. Seedling replenishment work is performed corresponding to the portion 28.

Further, on the left and right other sides of the control panel 47a, a main clutch lever 125 is provided inside the mission case 39 to turn on and off the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26.

In the transplanting machine of the present invention, the operation of the operator by the control handle 47 at the rear of the machine body is performed when moving to the field, loading and unloading from the transportation means, storing in the warehouse, and turning at the edge of the field. .. On the other hand, at the time of planting seedlings, the worker is on the work seat 46 of the traveling vehicle body 40, and it is difficult to operate the control handle 47 on the control panel 47a.

Therefore, on the traveling vehicle body 40, an on-vehicle body control unit 126 for a worker boarding the work seat 46 is provided.

As shown in FIGS. 4, 7 and 9, a rear step 127 that inclines upward to the rear side of the machine body is provided in the lower part of the seedling supply device 43, and either the left or right side of the rear step 127, that is, the right side of the machine body in this case. An on-vehicle control unit 126 is provided at the end (on the left side when the worker seated on the work seat 46 is used as a reference).

The vehicle body control unit 126 is provided with a second vehicle height adjusting lever 128 that adjusts the vehicle height of the traveling vehicle body 40 to adjust the planting depths of the planting hoppers 20a and 20b on the outermost side of the body. 2 The second main clutch lever 129 is arranged inside the machine body from the vehicle height adjustment lever 128.

Since it is basically not necessary to fix the vehicle height during the seedling planting work, the second vehicle height adjusting lever 128 is configured to have only the "high" position and the "low" position.

Then, at the outer end of the rear step 127, the vehicle height adjusting lever guide 130, which accommodates the second vehicle height adjusting lever 128 in the frame and forms a display scale indicating a guideline for the vehicle height, is inclined upward toward the front side of the machine body. The vehicle height adjusting lever guide 130 is provided in a posture, and a main clutch lever guide 131 for accommodating the second main clutch lever 129 in the frame is provided in an upwardly inclined posture toward the front side of the vehicle body.

The second vehicle height adjusting lever 128 has a larger amount of protrusion toward the front side of the machine body than the second main clutch lever 129.

Further, the second vehicle height adjusting lever 128 and the second main clutch lever 129 can rotate the base side of the mounting support plate 105 on the left and right sides of the machine body (on the right side of the machine body) and the front and rear beam frames 106f and 106r. If it is mounted, it is not necessary to separately provide a mounting member, and the number of parts can be reduced.

Further, side clutch pedals 132L and 132R for turning on and off the left and right side clutches are provided on the left and right sides of the fuselage, that is, on the left side of the fuselage with respect to the on-vehicle control unit 126, with the side clutch pedals 132L and 132R exposed on the upper surface of the rear step 127.

The vehicle height adjusting lever guide 130 and the main clutch lever guide 131 are arranged with a constant vertical interval S between the vehicle height adjusting lever guide 130 and the upper surface of the side step 118. The above-mentioned vertical spacing S is set to such an extent that a space is secured even if the operator's feet are inserted (eg, about 15 to 20 cm).

With the above configuration, the worker on the floor step 122 and on the work seat 46 can manually operate the planting depth and turn on / off the planting work without getting off the traveling vehicle body 40. , Work efficiency is improved and seedling planting accuracy is improved.

In addition, by arranging the second main clutch lever 129 inside the machine body that is closer to the work seat 46 than the second vehicle height adjustment lever 128, the second main clutch lever 129 is used for replenishing seedlings, correcting the planting state, taking a break, etc. The main clutch lever 129 is easily accessible to the operator, and labor can be reduced.

In particular, when a problem occurs, the planting work of seedlings can be interrupted promptly, the work of replanting seedlings becomes unnecessary, and the number of seedlings that are unsuitable for growth and discarded is reduced.

In addition, by projecting the second vehicle height adjustment lever 128 toward the front side of the machine body from the second main clutch lever 129, the arm is greatly extended when operating the second vehicle height adjustment lever 128 on the side far from the work seat 46. There is no need, and the labor of the worker is reduced.

By providing the left and right side clutch pedals 132L and 132R in the rear step 127, which of the side clutch pedals 132L and 132R is used when the traveling direction of the traveling vehicle body 40 is about to deviate from the straight direction with respect to the ridge. By temporarily disengaging the corresponding side clutch by operating the pedal, the course of the traveling vehicle body 40 can be corrected, and the seedling planting position can be prevented from meandering in the left-right direction.

Further, since the vehicle height adjustment lever guide 130 and the main clutch lever guide 131, that is, the upper and lower intervals S are formed between the upper and lower parts of the vehicle body control unit 126 and the side step 118, the work of getting on the work seat 46 The movement of the person's feet is not hindered, and the worker can board the driver's seat 46 in a comfortable posture, which reduces labor.

Spare seedling frames 50 capable of accommodating seedlings to be supplied to the seedling supply device 43 are provided at positions above the rear wheel axle 12 of the rear wheels 44 on both the left and right sides of the work seat 46 when viewed from the side of the machine body.

The spare seedling frame 50 is provided with a support stay 52 on an upper portion of a seedling mounting column 51 projecting to the outside of the traveling vehicle body 40, and the supporting stay 52 can be switched between a rotating state and a non-rotating state. An arm 53 is provided, and seedling frame frames 54 and 54 in the vertical direction are arranged at intervals on the seedling mounting rotation arm 53, and seedlings for replenishment are housed on the same surface of the seedling frame frames 54 and 54. It is configured by mounting one side end of a mounting table 55 on which a container such as a seedling box or a seedling tray is placed.

Only one mounting table 55 may be provided in the vertical direction, but a plurality of mounting tables 55 may be arranged at intervals in the vertical direction so as not to hinder the removal of the container.

The spare seedling frame 50 having the above configuration is provided on each of the left and right sides of the traveling vehicle body 40, and the seedling mounting rotation arm 53 is rotated on the support stay 52 according to the situation.

For example, when planting seedlings, the longitudinal direction of the mounting table 55 is directed to the front-rear direction of the machine body, so that the container for seedlings can be taken out from the mounting table 55 and the empty container can be easily returned to improve work efficiency. Can be improved.

Further, since the mounting table 55 is located on both the left and right sides of the traveling vehicle body 40 at this position, it becomes easier for the operator to grasp the end portion of the riding vehicle body 40 on which the vehicle can be boarded, and the legs protrude from the traveling vehicle body 40 and the posture is increased. Is prevented from breaking.

Further, when the worker gets on and off the traveling vehicle body 40, the seedling mounting rotation arm 53 is rotated by about 90 degrees.

As a result, space for getting on and off is formed on both the left and right sides of the traveling vehicle body 40.

The operator can also get on and off from the front side of the running body 40, but the seedling frame rotating arm 53 is rotated so that the seedling frame frames 54 and 54 are located on the front side of the machine body, and the mounting table 55 is rear of the machine body. When the state is located on the side, the worker can use the seedling frame frames 54 and 54 as handrails, so that the traveling vehicle body 40 can get on and off smoothly.

Further, when loading or unloading the seedling container on the mounting table 55, there is no member that hinders the loading and unloading of the container from the rear side of the machine body, so that the work efficiency is improved.

The work seat 46 is attached to the traveling vehicle body 40 in a U-shape in front view or rear view, and is a portion of the seat frame 49 straddling the body cover 48 covering the upper part of the engine 41 or the like in the left-right direction of the body. Attach it to the top of the. The bases of the left and right seat stays 49a facing the front side of the machine body are mounted on the upper part of the seat frame 49, and the work seat 46 is centered on the left and right rotation fulcrums on the base side of the left and right seat stays 49a. It is mounted so that it can rotate in the front-back direction.

As a result, the work seat 46 can be placed in a posture in which the seedling supply device 43 is in contact with the vicinity of the front end portion of the machine body, so that it is possible to prevent sand and rainwater from adhering to the seated portion of the worker when the work is interrupted.

However, since the work seat 46 is rotatable, the work seat 46 rotates when passing through a large unevenness, which makes the ride uncomfortable or disturbs the boarding posture of the worker to the seedling supply device 43. There is a problem that the supply timing of seedlings is disturbed.

In particular, in the case where the seating sensor 140 for detecting whether or not the worker is on the work seat 46 is provided and the seating sensor 140 is configured to perform some control when the seating sensor 140 does not detect the seating, the work is performed by erroneous detection. There is a problem that interruption and reduction of work accuracy occur.

In order to prevent this problem, the seat suspension mechanism 134 shown in FIG. 24 is arranged in the lower front side of the work seat 46 in a posture of contacting the left and right seat stays 49a.

The seat suspension mechanism 134 includes an upper plate 135 that is directly mounted on the lower part of the work seat 46, a concave lower plate 136 in a side view, and left and right suspension springs 137 that urge the lower plate 136 downward. The insulator 138 is provided on the outside of the machine body from the left and right suspension springs 137, and comes into contact with the recess of the lower plate 136 when the operator is seated and a load is applied. The insulator 138 is formed by forming an elastic member such as rubber into a tubular shape, and has a configuration capable of absorbing vibration.

Then, as shown in FIG. 25, magnet sheets 139 are attached to the lower surfaces of the lower plate 136, which are in contact with the left and right seat stays 49a.

With the above configuration, the seat suspension mechanism 134 can absorb the vibration generated by the traveling and working of the traveling vehicle body 40, so that the operator is less likely to get tired due to the influence of the vibration.

Further, when the work seat 46 is rotated to the used position, the magnet sheet 139 sticks to the left and right seat stays 49a by magnetic force, so that the work seat 46 moves to the front side of the machine even if the machine shakes due to the influence of unevenness in the field. Since the rotation can be prevented, the sitting posture of the worker does not change easily, the labor can be reduced, and the planting accuracy of the seedlings is improved.

Instead of the above-mentioned magnet sheet 139, plate-shaped surface fasteners are attached to the lower plate 136 and the left and right seat stays 49a with an adhesive or the like, and rotation is restricted by contact between the surface fasteners. May be good.

When the seating sensor 140 is mounted on the work seat 46, if the seating sensor 140 is mounted on the left and right seat stays 49a, the seating sensor 140 will be arranged at the fixed portion. Since the harness for transmitting the signal can be arranged without considering the rotation, the configuration can be simplified.

Further, since the harness is not pulled during rotation and the wire is not broken, the seating sensor 140 does not become undetectable, and the control using the seating sensor 140 can be utilized.

The seating sensor 140 is composed of a vertical movement type seating switch 141 that rotates the work seat 46 to a working position and is pushed down by a load due to the appearance of an operator to detect seating. What is the seating switch 141? It is made of an elastic member such as rubber in order to prevent it from being deformed even when a load is applied.

With the above configuration, since the seating switch 141 is configured to move in the vertical direction, it is difficult for soil to collect in the movable range of the seating switch 141, and the detection accuracy of the seating sensor 140 is prevented from deteriorating.

As shown in FIGS. 26A and 26B, the seating switch 141 is provided in a switch holder 142 provided on at least one side of the seat stay 49a so as to be vertically movable, and the work seat 46 is rotated to a non-working position. When the member is loaded on the seat stay 49a in this state, the upper surface of the seat stay 49a may be flattened.

As a result, the seedling box, the fuel tank, and the like can be temporarily placed on the upper surfaces of the left and right seat stays 49a, so that the work efficiency is improved.

Further, the lower ends on both the left and right sides of the seat frame 49 are slide frames (illustrated) that change the left-right spacing of the left and right rear wheels 44, 44 by moving the left and right traveling transmission cases 38, 38 in the left-right direction. Omitted).

As a result, the seat frame 49 also serves as a constituent member of the slide portion, so that the strength of the slide portion can be improved.

When transplanting seedlings to a field, so-called irrigation work may be performed in which water is supplied to the vicinity of the planted seedlings in consideration of conditions such as the soil quality of the field, the surrounding water environment, and the weather before the work.

As shown in FIG. 4, the transplanting machine of the present invention has a lateral protrusion 51a in which at least one of the seedling mounting columns 51 provided on the left and right sides of the traveling vehicle body 40 projects from the lower part of the floor step 122 to the outside of the machine body. At the same time, the outer end of the body of the lateral protrusion 51a is bent upward near the outer end of the traveling transmission case 38 to have the upper and lower portions 51b, and the lateral protrusions 51a and the upper and lower portions 51b are formed. Is provided with a water tank holder 601 having a rectangular frame shape in a plan view.

As shown in FIG. 1, the water tank holder 601 is arranged so that the long side portion faces in the front-rear direction of the machine body, and is located on the outer side of the machine body and at a position rearward from the center part in the front-rear direction of the machine body. A first joint 602 in the left-right direction to be connected to the 51b is provided, and a first joint in the vertical direction to be connected to the lateral protrusion 51a of the seedling support column 51 is provided at the inner part of the machine body and at a position rearward from the central part in the front-rear direction of the machine body. Two joints 603 are provided.

Since the mounting position of the water tank holder 601 is located on the rear side of the central part in the front-rear direction of the machine body, the rear part of the machine body of the water tank 600 to be loaded is separated from the rear wheel 44 to the front side of the machine body. It is prevented that the tank 600 comes into contact with the rear wheels 44 and interferes with the vehicle height adjustment.

Further, since the rear portion of the water tank 600 is located on the front side of the machine body, that is, above the vicinity of the rotation fulcrum, in the traveling transmission case 38, the vertical position during vertical rotation is difficult to change, so that the water tank 600 is placed in the traveling transmission case 38. Interference is prevented and it is prevented from interfering with vehicle height adjustment.

Then, by connecting the water tank holder 601 to the lateral protrusions 51a and the upper and lower portions 51b of the seedling support column 51 via the first joint 602 and the second joint 603, the seedling mounting column 51 is connected to the water tank holder 601. Since it can be used as a mounting member for the above, the number of parts can be reduced.

In addition, since the lateral protrusion 51a of the seedling support column 51 serves as the bottom support of the water tank 600, it is not necessary to separately prepare a bottom support member capable of withstanding the water tank 600 filled with water, and the number of parts can be reduced. More planned.

Both the left and right seedling mounting columns 51 may have the same shape, and water tank stays 601 may be provided on both.

The water for irrigation stored in the water tank 600 is pumped up by the operation of the irrigation pump 700 provided at the bottom of the traveling vehicle body 40 and near the center of the front and rear of the machine body, and the planting hoppers 20a and 20b are positioned to plant seedlings. Is discharged to. The irrigation pumps 700 are arranged according to the number of planting hoppers 20a and 20b, and are arranged on the left and right at intervals with reference to the left and right center portions of the traveling vehicle body 40.

A hose may be attached to the irrigation pump 700 to discharge water from the water tank 600 via the irrigation pump 700 and the water from the watering nozzle 710. However, depending on the operation of the piston cylinder (not shown) of the irrigation pump 700. , A part of the water sent out in the discharge direction may be returned to the water tank 600 side. As a result, the amount of irrigation supplied to the field at one time is reduced, and there is a risk that the growth of seedlings may be delayed due to lack of water, or the quality of the harvested product may be deteriorated due to poor growth.

In order to prevent this, check valves 720 that limit the water supply direction to one side are provided at the lower part of the outer side of the left and right side steps 118, respectively, and the water tank 600 and the water supply side of the check valve 720 are connected by a water absorption hose 721. At the same time, the drain side of the check valve 720 and the drain nozzle 710 are connected by a drain hose 722. Further, the check valve 720 and the irrigation pump 700 are connected by a relay hose 723.

More specifically, as shown in FIG. 27, first, the water absorption check valve 724 and the drainage check valve 725 facing in the direction allowing water supply from the front side to the rear side of the machine body are arranged one above the other, and the outer end of the machine body of the side step 118 is arranged. Attach it to the bottom of the part. Then, one side of the water absorption hose 721 is allowed to enter the water tank 600, the other side is connected to the inlet of the water absorption check valve 724, that is, the front side of the machine body, and one side of the drainage hose 722 is the outlet of the drainage check valve 725. That is, it is connected to the rear side of the machine body, and the other side is connected to the drainage nozzle 710.

The irrigation pump 700 is equipped with the base side of the first relay hose 723a in the left-right direction of the machine body, and the convergence port of the three-pronged branch joint 723d is mounted on the end side. A second relay hose 723b is provided between the water absorption port of the branch joint 723d and the outlet of the water absorption check valve 724 (rear side of the machine body), and the drainage port of the branch joint 723d and the inlet of the drainage check valve 725 (front side of the machine body). ), A third relay hose 723c is provided.

The drainage nozzle 710 may supply water directly to the field, but irrigation is poured into the inside from the upper openings of the planting hoppers 20a and 20b with a certain amount of water force and adheres to the inside of the planting hoppers 20a and 20b. It may be configured to be used for removing the mud.

As a result, the scraper that enters the inside while the planting hoppers 20a and 20b are open and removes mud becomes unnecessary, so that the number of parts can be reduced.

If the scraper draws a predetermined locus in conjunction with the raising and lowering of the planting hoppers 20a and 20b, the number of parts of the mechanism for raising and lowering the planting hopper 20a and 20b can be reduced. Is simplified.

Further, since the mud can be returned to the field by irrigation, it is possible to prevent the outside of the field from being contaminated with the mud, and the outflow of nutrients in the field is reduced.

With the above configuration, the check valve 720 is arranged in the space on the left and right outside of the machine, so when a problem such as clogging occurs, it is easy to investigate the cause and perform maintenance work, and it is possible to reduce labor and work time. ..

Further, by arranging the water absorption check valve 724 and the drainage check valve 725 to have the same water supply direction, it is difficult to make a mistake in the mounting direction during the assembly work after disassembly, and the work efficiency is improved.

Further, by arranging the check valve 720 on the rear side of the water tank 600, on the front side of the planting hoppers 20a and 20b, and on the outside of the body of the irrigation pump 700, the water absorption hose 721, the drain hose 722, and the first relay hose are arranged. The bending of the 723a, the second relay hose 723b, and the third relay hose 723c can be minimized, and the arrangement can be arranged so as not to overlap.

If the water absorption check valve 724 and the drainage check valve 725 are transparent cylinders, and the internal spring and the ball for preventing backflow can be confirmed from the outside, the water supply direction can be visually recognized and mounting mistakes are less likely to occur.

The transplanting machine according to the present invention can be applied to increase the strength of the traveling vehicle body of the transplanting machine for planting seedlings, increase the degree of freedom in design, and the like, and has high industrial applicability.

20a Planting hopper (planting device)
20b Planting hopper (planting device)
26 Transmission case 38 Travel transmission case 39 Mission case 40 Travel vehicle body 41 Engine 43 Seedling supply device 44 Rear wheel (travel device)
47 Steering wheel 101 Axle cover 103 Main frame 104 Handle frame 105 Mounting support plate (support member)
106f Front beam frame (support member)
106r Rear beam frame (support member)
107 Supply support frame 108 Bumper support frame 109 Bumper 113 Front boarding step 126 Body control

Claims (1)

Left and right traveling devices (44) traveling in the field on the traveling vehicle body (40), a seedling supply device (43) for supplying seedlings, and a planting device (43) for receiving seedlings from the seedling supply device (43) and planting them in the field. In a transplant machine equipped with 20a, 20b)
The main frames (103) of the traveling vehicle body (40) are provided on both the left and right sides of the machine body, and the left-right spacing of the rear ends of the left and right main frames (103) is wider than the left-right spacing of the front end, and the seedling supply device. The configuration is such that it fits within the left-right width of (43), and it is also configured to fit within the left-right width of (43).
Transmission cases (38) that transmit to the traveling device (44) are rotatably provided on both left and right sides of the traveling vehicle body (40), and a control handle (47) that controls the aircraft is provided at the rear portion of the traveling vehicle body (40). )
The front side of the left and right main frames (103) are attached to the axle covers (101) connected to the transmission case (38) , and the rear side of the body is a handle frame (104) that supports the steering handle (47). A transplant machine characterized in that it is connected to each of the left and right sides of the.

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