JP2020184949A5 - - Google Patents

Description

Rice transplanter

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

Conventionally, there is known a transplanter in which a worker puts seedlings into a seedling supply device and then plants the thrown seedlings with a seedling planting device (Patent Document 1).

This transplant machine is provided with a left-right tilt sensor that detects the tilt of the machine in the left-right direction, and the rolling cylinder expands and contracts due to the detection of the left-right tilt sensor, so that the posture of the machine is horizontal to the ridge surface. The configuration is maintained. As a result, the seedling planting device is maintained in a posture substantially perpendicular to the ridge surface, so that the seedling planting posture is prevented from being disturbed.

Japanese Unexamined Patent Publication No. 2012-90595

However, in the transplant machine of Patent Document 1, the inclination of the machine in the left-right direction, that is, the rolling direction is detected, and the posture of the machine is kept horizontal by the automatic expansion and contraction of the rolling cylinder, but in the front-rear direction of the machine, that is, in the pitching direction. No tilt has been detected.

Therefore, there is a problem that the seedling planting device is tilted forward or backward with respect to the ridge surface, and the seedlings are planted in a posture tilted forward or backward, so that the planting accuracy of the seedlings is lowered. In addition, the seedlings planted at an angle fall down due to their own weight or wind depending on the angle, so that the worker needs to manually replant the seedlings, which causes a problem that extra labor and time are consumed.

In addition, if the tilt angle is large, the aircraft will not be able to maintain balance and will fall over, and the seedling supply device and seedlings on the aircraft will be scattered in the field, causing problems such as the seedlings being damaged and unsuitable for transplantation, and collecting seedlings. The problem arises that extra effort and time is spent. In addition to this, there is a problem that each part of the aircraft is damaged when it falls and the work cannot be continued, and there is a problem that extra time and cost are required for repair.

In consideration of the conventional problems, the present invention detects the inclination of the machine body in the front-rear direction, interrupts the work when a problem may occur in the work, prevents the planting posture of the seedlings from being disturbed, and damages the machine body. The purpose is to provide a transplant machine that can prevent the above.

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

That is, the invention according to claim 1, the run line vehicle body (40), the run line device (44) and the planting device (20a, 20b) transplanter providing, to the rear of the vehicle body (40), wherein planting apparatus (20a, 20b) provided with rotatably the leveling quell device around the soil seedlings planting (37), the inclination oblique angle of the vehicle body (40) is equal to or greater than a predetermined angle, the The transplanter is characterized by being provided with a stop member (194) that comes into contact with the pressure reducing device (37) and stops transmission to the traveling device (44) and the planting device (20a, 20b).

The invention according to claim 2 is a left and right suppression arm (370, 370) rotatably attached to the traveling vehicle body (40), and a suppression rotating body (371) provided on the left and right suppression arms (370, 370). , 371) , the left and right stop members (194) are provided in pairs, and when either one of the left and right stop members (194, 194) comes into contact with the suppression arm (370, 370), the traveling device (44) and the traveling device (44) The transplanter according to claim 1, wherein the transmission to the planting apparatus (20a, 20b) is stopped.

The invention according to claim 3 is provided with a boarding detection member (195) for detecting whether or not an operator is on the traveling vehicle body (40), and when the boarding detection member (195) is not detected. The claim is characterized in that the stop member (194) does not stop the transmission to the traveling device (44) and the planting device (20a, 20b) even if the traveling vehicle body (40) is tilted by a predetermined angle or more. The transplanter according to 1 or 2.

The invention according to claim 4 is provided with a first ridge detection member (182) that activates a notification device (181) when the end of the ridge is detected on the front side of the traveling vehicle body (40), and the first ridge end. If the detection member (182) is not in the non-detection state and the boarding detection member (195) is not in the detection state, the stop member (194) is in a forward tilted posture in which the traveling vehicle body (40) is at least a predetermined angle. The transplanting machine according to claim 3, wherein the transmission to the traveling device (44) and the planting device (20a, 20b) is not stopped even if it becomes.

According to the fifth aspect of the present invention, when the end of the ridge is detected while the first ridge detecting member (182) is in the detection state, the traveling device (44) and the planting device (20a, 20b) are subjected to the invention. A second ridge detection member (188) for stopping transmission is provided on the rear side of the machine body with respect to the first ridge detection member (182), and transmission to the traveling device (44) and the planting device (20a, 20b). When the first ridge detection member (182) and the second ridge detection member (188) are in the detection state, and the boarding detection member (195) is in the detection state, the traveling device ( 44) The transplanting machine according to claim 4, wherein the transmission to the planting device (20a, 20b) is stopped.

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According to the invention of claim 1, when the traveling vehicle body (40) is greatly tilted in the front-rear direction to the extent that traveling and planting of seedlings are hindered, the traveling device (44) and the planting device (20a, 20b) are subjected to the invention. The automatic stop of transmission prevents seedlings from being planted in an improper posture.

In addition, it is possible to prevent the aircraft from falling over and being damaged due to excessive inclination, and to prevent the loaded seedlings from falling and being damaged.
Further, by using the suppression device (37) to detect an excessive inclination of the traveling vehicle body (40), a stop member (37) is attached to the suppression device (37) which is in contact with the traveling vehicle body (40) even when the traveling vehicle body (40) is in a forward tilted posture. 194) can be reliably contacted, and traveling and planting transmission can be reliably stopped.

According to the invention of claim 2, in addition to the effect of the invention of claim 1, when the traveling vehicle body (40) is in a forward upward tilting posture even when the traveling vehicle body (40) is tilted in the left-right direction of the aircraft. If either one of the left and right stop members (194, 194) comes into contact with the left and right suppression arms (370, 370), the traveling and planting transmission can be reliably stopped, so the seedlings are planted in an inappropriate posture. It is prevented from being done .

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, when the boarding detection member (195) is not detected, even if the traveling vehicle body (40) is tilted by a predetermined angle or more. By not stopping the traveling and planting transmission, it is possible to prevent the transmission from stopping when the aircraft is moved or during maintenance work .

According to the invention of claim 4, in addition to the effect of the invention of claim 3, when the first ridge detection member (182) and the boarding detection member (195) are not detected, the traveling vehicle body (40) By not stopping the traveling and planting transmission even if the vehicle is tilted by a predetermined angle or more, it is possible to prevent the transmission from stopping when the aircraft is moved or during maintenance work .

According to the invention of claim 5, in addition to the effect of the invention of claim 4, when the worker is on the traveling vehicle body (40) and is traveling while planting seedlings across the ridges. However, when the traveling vehicle body (40) is tilted by a predetermined angle or more in the front-rear direction, traveling and planting transmission can be stopped, so that unnecessary stoppage is prevented and work efficiency is improved .

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Left side view of the transplanter Right side view of the transplanter Rear view of the transplanter Front view of rice transplanter Top view of the transplanter 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 Side view of the main part of a transplanter equipped with an irrigation pump and a check valve Perspective view of the main part showing the control part, planting device, seedling supply device, etc. at the rear of the machine Left side view of a transplanter equipped with a visual device that displays images taken by a camera on a display Perspective view of the main part of the transplanter showing the first ridge sensor, boarding step, etc. Side view of the main part showing the boarding / alighting assistance step that moves up and down Front view of the main part showing the boarding / alighting assistance step that moves up and down An exploded perspective view showing the boarding / alighting assistance step of another configuration example. (A) A perspective view of a main part showing a semicircular getting-on / off assist step of another configuration example, and (b) a perspective view of a main part showing an L-shaped getting-on / off assist step of another configuration example. Side view of a main part showing a seedling supply device equipped with a second throttle lever that can be taken in and out. Side view of a main part showing a seedling supply device provided with a second throttle lever that can be taken in and out of another configuration example. Block diagram showing various sensors and corresponding operating members Flow chart showing that the excess tilt sensor is in the detection state and the transmission is stopped when the worker is on board. Flow chart showing that the transmission is stopped when either the left or right excess tilt sensor is in the detection state and the operator is on board. Flow chart showing that the excess tilt sensor is in the detection state while the planting work on the ridge is running, and the transmission is stopped when the worker is on board. Right side view of a transplanter equipped with a second ridge sensor A flowchart showing that the transmission is stopped when the first ridge sensor and the second ridge sensor detect the arrival at the ridge. Flow chart showing that the ridge sensor moves away from the ridge at the ridge and the vehicle height drops, and the transmission is stopped when the excessive inclination sensor enters the detection state. At the ridge, the ridge sensor separates from the ridge and the vehicle height drops, the excess tilt sensor enters the detection state, and when the first ridge sensor and the second ridge sensor detect the arrival at the ridge, the transmission is stopped. Flow chart showing that (A) Cross-sectional view of the main part showing the water absorption pipe connected to the water absorption hose, (b) Front view of the water absorption pipe with the first water absorption cover attached, (c) Front view of the water absorption pipe with the second water absorption cover attached. Side sectional view of a water tank having a water suction port to which a water absorption hose is attached at the bottom.

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

FIG. 1 is a left side view showing a transplanter 10 for transplanting seedlings as an example of the transplanter 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. At the same time, FIG. 5 is a plan view.

In the following description, the side where the steering wheel 404 is arranged is the rear side, and the opposite side, that is, the side where 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 5, the transplanting machine 10 of the present embodiment has a traveling vehicle body 40 capable of traveling forward, a steering handle 404 for walking control 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 which is a drive device 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 parts of the rear side 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 front and rear frames 103, which will be described later, to suppress the left and 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. 1 to 5 and 18, at least the transmission case 26 is supplied to the transmission case 26 which is transmitted from the mission case 39 to branch and supply the driving force to the planting device 42 and the seedling supply device 43. A base plate 400 that covers the left and right side surfaces and the back surface is provided, and a frame stay 401 is detachably provided at the rear portion of the base plate 400 via a fixing member such as a bolt. Then, the frame stay 401 is provided with a handle frame 402 that protrudes in a shape that draws an arc toward the upper rear side of the machine body, and the rear portion of the handle frame 402 is used for vertical adjustment of the vehicle height and transmission of traveling and planting work. In addition to providing a control unit 403 for operating the on / off of the seedlings, a control handle 404 to be gripped when the operator operates the machine body when moving without planting seedlings is provided. The steering handle 404 has a shape that bends in the left-right direction of the fuselage and toward the rear of the fuselage with the handle frame 402 as the center, and on the left and right rear sides, a side clutch operating lever 405 that turns on and off the transmission to the rear wheels 44. Are provided respectively. Further, a first throttle lever 406 for increasing / decreasing the output of the engine 41 is provided on either the left or right side of the steering wheel 47.

A control panel 47a is provided between the left and right sides of the steering wheel 404, and the control panel 47a is provided with a vehicle height adjusting lever 123 for adjusting the vehicle height of the traveling vehicle body 40 by expanding and contracting the lifting hydraulic cylinder 300, and left and right. The main clutch lever 125 that turns on and off the transmission of the driving force to the traveling transmission case 38 and the transmission case 26, the first engine switch 407 that switches whether the engine 41 can be started and stops, and the traveling vehicle body 40. A main speed change lever 150 for switching the transmission to either moving speed, planting work speed, running neutral or reverse is provided.

When permitting the start of the engine 41, the operator pushes in and rotates the first engine switch 407 to operate the engine 41 in the on position. As a result, when the engine 41 is started, the engine 41 is started. The engine 41 may be started by using a cell starter or a recoil starter. Further, even when the engine is operated by a drive device other than the engine 41, for example, an electric motor, the electric motor is energized and started when the first engine switch 407 is in the ON position.

When the engine 41 is stopped, when the operator lightly pushes the first engine switch 407, the engine 41 is switched to the off position by the force of the built-in torque spring (not shown), whereby the engine 41 is stopped.

Since it is only necessary to lightly push the first engine switch 407 during the off operation, running and planting can be stopped immediately. As a result, the running and planting are stopped immediately when the ridges are reached, so that the planting operation of the seedlings in the non-ridged part is prevented and the extra seedlings consumed are reduced. In addition, when the aircraft is moved to the ridge for the next planting work, no extra movement occurs, so that fuel consumption and working time are reduced.

A seedling supply device 43 for transporting seedlings to be thrown by an operator to the left and right planting hoppers 20a and 20b, which will be described later, is provided on the front side of the control handle 47 and above the transmission case 26. The strength of the vicinity of the control handle 47 and the seedling supply device 43 is improved and vibration is generated over the rear portion of the seedling supply device 43 and the reinforcing connecting stay 151 provided on the rear upper part of the handle frame 402 and on the front side of the control panel 47a. A reinforcing frame 152 in the front-rear direction is provided to reduce the number.

Then, between the front and rear of the reinforcing frame 152, the rotation support plate 153 having an L-shape in the side view is mounted in a posture of projecting toward the left and right other sides of the machine body (right side of the machine body) in the rear view. The left and right sides of the rotation support plate 153 are open, and the base portion of the visual rotation arm 154 is rotatably mounted on the open side. The visual rotation arm 154 can be rotated on one side (left side of the machine) on the left and right sides of the machine until it contacts the handle frame 402, and on the other side on the left and right sides of the machine, it rotates to a position where it contacts the rotation support plate 153. Make it possible. In other words, the rotation support plate 153 has a downward tilting posture in which the seedling supply device 43 and the visual rotation arm 154 are substantially parallel to each other when the visual rotation arm 154 is rotated in the left-right or other side of the machine body. At this position, rotation is regulated by the rotation restricting unit 153a located on the lower side of the machine body.

Below the portion where the visual rotation arm 154 is provided, the vertical movement mechanism 21 on the left and right other sides for raising and lowering the planting hopper 20b on the left and right other sides of the machine body is arranged so as to be vertically rotatable. The visual rotation arm 154, which is rotated to the left and right sides of the machine until it comes into contact with the regulating portion 153a, is arranged so as to be located above the machine body with respect to the vertical movement mechanism 21 which is rotated upward to the maximum extent.

A view of the traveling vehicle body 40 in the traveling direction, that is, the front side of the aircraft is reflected on the end side of the visual recognition rotating arm 154, and the work seat 46 and the floor step 122, which will be described later, are reflected in the traveling vehicle body 40 in the traveling direction. A visual recognition member 155 is rotatably provided so that an operator who is boarding with his / her back can see it. More specifically, the visual recognition member 155 has a ball-shaped connecting body (not shown) on the rear side of the machine body, and the ball-shaped connecting body is connected to a connecting hole portion (not shown) on the visual recognition rotating arm 154 side. It is configured to be screwed into, rotate and adjust the angle.

If the visual recognition member 155 is a mirror 155a, the scenery on the front side of the machine body can be projected only by attaching the mirror 155a, so that the cost increase due to the attachment can be suppressed. In the field where seedlings are planted, it may be difficult to see due to the reflection of sunlight and surrounding lighting depending on the work time and work place. Therefore, a shade body (not shown) or the like is placed on the upper side of the mirror 155. It should be possible to install it.

Alternatively, as shown in FIG. 19, instead of the mirror 155a, the visual recognition member 155 is a display 155b such as a liquid crystal display, and the display 155b is photographed by a camera 156 provided on the front side of the traveling vehicle body 40 and near the central portion in the left-right direction. It may be configured to project an image to be displayed.
At this time, the display 155b and the camera 156 may be connected by wire, but a wireless communication device may be used to eliminate the need for arrangement. Further, as the display 155b, a communication terminal having a communication function and a video display function such as a tablet or a smartphone may be used.

As described above, the visual recognition device 157 is configured.

In the above configuration, the visual recognition rotation arm 154 can be rotated in an arc shape in the left-right direction of the machine body around the rotation axis in the front-rear direction, and the left-right position and the vertical height of the visual recognition member 155 can be changed. Make it easier to see the scenery in front of the machine reflected on the visual recognition member 155 according to the work posture of the person, for example, whether to work while sitting on the work seat 46 or standing on the floor step 122, or according to the physique of the worker. be able to. As a result, the worker can surely find the approach to the ridge end where the planting work of the seedling is completed and the presence or absence of obstacles in the course, so that the seedling can be planted wastefully in a place other than the ridge. , It is possible to prevent the traveling vehicle body 40 from being damaged by contact with an obstacle.

In addition, the worker needs to turn his back in the direction of travel and put the seedlings into the seedling supply device 43 arranged on the rear side of the machine, but since it is not necessary to turn to the back to see the state of the front side of the machine, the seedlings It is possible to prevent the so-called lack of stock, in which the supply is interrupted and the planting hoppers 20a and 20b do not plant seedlings in the field.

As a result, the worker does not have to manually plant the seedlings at the place where the stock deficiency occurs, and the labor of the worker is reduced.

Then, when the visual rotation arm 154 is rotated toward the left and right sides of the machine during storage or the like, the visual rotation arm 154 is located inside the machine from the left and right ends of the machine and the left and right width of the machine. Since the configuration is such that it fits inside, the visual recognition device 157 is prevented from being caught and damaged at the storage location.

Further, even when the visual rotation arm 154 is rotated to the maximum extent toward the rotation restricting portion 153a on the left and right sides of the machine when not in use, the visual rotation arm 154 is in an upper position that does not interfere with the vertical movement mechanism 21. Since it is located at, the visual rotation arm 154 is prevented from being damaged by contact with the vertical movement mechanism 21.

Further, since the base side of the visual recognition device 157 is provided between the front and rear of the reinforcing frame 152, the vibration of the machine body is not easily transmitted to the visual recognition device 157, and the scenery reflected on the visual recognition member 155 becomes easy to be visually recognized.

Further, by connecting the handle frame 402 and the seedling supply device 43 with the reinforcing frame 152, the strength of the machine body can be improved.

The visual rotation arm 154 is attached to the rotation support plate 153 with a double nut to prevent it from coming off or rotating downward due to its own weight, while rotating with a light force during the rotation operation of the operator. On the other hand, the adjustment work is easy and can be done without tools.

A U-shaped bumper support frame 108 is provided on the front side of the machine body and on both the left and right sides of the mission case 39 so as to project toward the front side of the body. 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. 6 to 8, 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 less likely 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.

The rear portion of the engine 41 is loaded on the front side and one side of the left and right sides of the mission case 39, and the front portion of the engine 41 is loaded on an engine mount arranged near the left and right center portions of the front beam frame 110. However, 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, thus preventing the engine 41 from being damaged or causing malfunction due to the impact. it 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, on the left and right sides of the bumper plate 109a, step support plates 111 having recesses in the left-right direction for mounting the bumper rod 109c are mounted. 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 on one side of the traveling vehicle body 40 on the left and right sides of the aircraft, that is, on the left side of the aircraft, the front side portion of the front boarding step 113 on which the operator puts his / her foot when getting on and off from the front side of the aircraft. To wear. On the other hand, on the left and right sides of the machine body, that is, on the right side of the machine body, the front-rear distance between the seedlings to be planted by the planting hoppers 20a and 20b, that is, the so-called stock spacing, is set. Form an inter-stock switching cover 114 that supports the planting speed change lever 803 that selects the first planting speed or the second planting speed when is being operated to the planting speed.

The front boarding step 113 includes a lower footrest portion 113a located on the front side of the aircraft and on the lower side in the vertical direction, and an upper footrest portion 113b located on the rear side of the aircraft and on the upper side in the vertical direction with respect to the lower footrest portion 113a. It is located between the upper and lower parts of the lower footrest portion 113a and the upper footrest portion 113b, and is composed of an intermediate inclined portion 113c that twists and inclines toward the outside of the machine body. A plurality of non-slip protrusions 113d are formed on the surface of the lower footrest portion 113a, and the intermediate inclined portion 113c has an inclination angle that makes it difficult for the operator to psychologically place the foot when getting on and off, and the lower footrest portion 113c. It is the front-rear length that is passed across the 113a and the upper footrest 113b when moving.

On the other hand, the inter-stock switching cover 114 includes a lower base portion 114a located on the front side of the machine body and on the lower side in the vertical direction, and an upper base portion 114b located on the rear side of the machine body and on the upper side in the vertical direction with respect to the lower base portion 114a. , Located between the upper and lower sides of the lower base 114a and the upper base 114b, twisting and tilting toward the outside of the machine, the inter-stock main shift lever 801 and the inter-stock sub-shift lever 802, and the main shift lever 150 move, respectively. It is composed of a lever mounting portion 114c having a moving groove formed therein.

The front boarding step 113 and the inter-stock switching cover 114 have symmetrical shapes, and the inter-stock switching cover 114 may be provided on one side of the left and right sides of the machine, and the front side boarding step 113 may be provided on the other side of the left and right sides of the machine.

Then, on the rear side of the upper footrest portion 113b and the upper base portion 114b, a worker gets on and off from the side of the machine body, and side step 118s that serve as scaffolding during work are provided respectively.
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. Further, 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 described above, the floor step 122 is configured.

The front boarding step 113, the inter-stock switching cover 114, the left and right side steps 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.

A boarding / alighting assist mechanism 170 on which an operator rests his / her feet when getting on / off the front boarding step 113 is attached to the lower part of the front side of the front boarding step 113. The boarding / alighting assistance mechanism 170 has an L-shaped side view, which is located on the outside of the machine body, and has an outer support arm 171 having a first protrusion 171a which protrudes forward of the machine body below the bent portion and inside the machine body. Located over the inner support arm 172, which is L-shaped in front view and has a second protrusion 172a protruding outward from the fuselage below the bent portion, and the first protrusion 171a and the second protrusion 172a. It is composed of the boarding / alighting assistance step 173 provided.

The outer support arm 171 is fastened together with the step support plate 111 with co-tightening bolts 174 ... and mounted on the traveling vehicle body 40. Further, the inner support arm 172, together with the bumper plate 109a, is fastened together with the co-tightening bolts 174 ... and attached to the traveling vehicle body 40.

As a result, since a plurality of members are tightened with the co-tightening bolts 174 ..., the strength of the traveling vehicle body 40 near the front side of the machine body is improved, and the durability due to the load when the operator gets on and off is reduced. It will be reduced.

Further, by providing the boarding / alighting assistance step 173, even if the vehicle height of the traveling vehicle body 40 is raised according to the height of the ridges and the like, the operator puts his / her foot on the boarding / alighting assistance step 173 and the front boarding step 113 Since the foot can be stepped on the lower footrest 113a to get in and get off by the reverse operation, there is no need to raise the foot high when getting on and off, and there is no need to jump off at all, and the worker's body. The burden on the car is reduced.

Since the boarding / alighting assist step 173 is provided over the first protruding portion 171a and the second protruding portion 172a, the outer support arm 171 and the inner support arm 172 are not located within the left-right width of the boarding / alighting assist step 173. The operator's foot is prevented from coming into contact with the outer support arm 171 and the inner support arm 172.

On the other hand, when the vehicle height of the traveling vehicle body 40 is lowered or during the planting work, not only the boarding / alighting assist mechanism 170 becomes unnecessary, but also the ridges come into contact with the ridges or the slopes of the ridges depending on the vehicle height. There is a risk of breaking and reducing the planting accuracy of seedlings.

In order to prevent this, the bases of the outer support arm 171 and the inner support arm 172 are attached with double nuts (not shown), and the outer support arm 171 and the inner support arm 172 are rotated using the co-tightening bolt 174 ... as a rotation fulcrum. It is preferable to mount it so that the boarding / alighting assist mechanism 170 can rotate up and down.

With the above configuration, the boarding / alighting assisting mechanism 170 can be rotated upward away from the ridge surface when it is not needed, so that the boarding / alighting assisting mechanism 170 is prevented from breaking the ridges and the seedling planting accuracy is maintained.

Alternatively, instead of the above configuration, as shown in FIGS. 21 and 22, the outer support arm 171 is slidable along the vertical direction of the outer base arm 175 mounted on the traveling vehicle body 40 side and the outer base arm 175. It is composed of an outer sliding arm 176 provided in the above and an outer pulling spring 177 having an urging force to pull the outer sliding arm 176 upward of the machine body, and the vertical length can be changed. Further, an inner base arm 178 for mounting the inner support arm 172 on the traveling vehicle body 40 side, an inner sliding arm 179 slidably provided along the vertical direction of the inner base arm 178, and the inner sliding arm 179. Is configured by an inner pulling spring 180 having an urging force to pull up the machine, and the vertical length can be changed.

The boarding / alighting assist step 173 is provided over the first protruding portion 171a of the outer sliding arm 176 and the second protruding portion 172a of the inner sliding arm 179, and when a load is applied to the boarding / alighting assist step 173, the outer sliding arm 176 and the inner side are provided. The sliding arm 179 moves downward against the urging force of the outer pulling spring 177 and the inner pulling spring 180, moves to the boarding / alighting position of the traveling vehicle body 40, and is put into use.

In the above configuration, when the load is no longer applied to the boarding / alighting assistance step 173, the outer sliding arm 176 and the inner sliding arm 179 slide upward due to the urging force of the outer pulling spring 177 and the inner pulling spring 180. Since it is configured to switch to the unused state, a fixing member (not shown) such as a pin for fixing at the used position may be provided.

With the above configuration, especially when boarding the traveling vehicle body 40, when the worker puts his / her weight on the boarding / alighting assistance step 173, he / she can board the front boarding step 113 via the boarding / alighting assistance step 173.

In the above configuration, the vehicle gets on and off from the front of the traveling vehicle body 40, but if there is a puddle or mud in the field, it may be difficult for the worker to get on and off. At this time, an oblique auxiliary step 196 may be provided for getting on and off from the oblique front of the traveling vehicle body 40.

As shown in FIG. 23, a U-shaped step stay 197 in a plan view is attached to the front wheels 45 on one side of the left and right sides of the airframe via the axle 18 while surrounding the left and right sides and the rear portion of the front wheels 45. A scraper 197a for removing soil adhering to the front wheel 45 by contact is provided on the rear upper portion of the step stay 197, and an oblique auxiliary step 196 is provided on the upper portion of the scraper 197a.

As a result, the worker can board the front boarding step 113 from the oblique auxiliary step 196, so that the worker can move efficiently according to the work place.

Further, since the scraper 197a is provided on the step stay 197, the soil adhering to the front wheel 45 can be removed, so that the diameter of the front wheel 45 is stabilized and the traveling posture is prevented from being disturbed.

The diagonal auxiliary step 196 includes the semicircular step plate 198 shown in FIG. 24A, which surrounds at least half the circumference of the outer circumference of the vertical frame 17 on which the front wheel 45 is attached, in order to increase the area on which the worker's feet are placed. The L-shaped step plate 199 having an L-shaped plan view shown in FIG. 24B, which is located on the side and the rear of the vertical frame 17, may be used.

This makes it easier to put not only a part of the worker's foot but the whole foot on it, so that getting on and off can be done in a more stable posture, and the efficiency can be further improved.

As shown in FIGS. 1 to 8, the lower portion of the inter-stock switching cover 114 rotates downward due to its own weight and comes into contact with the ridge surface, and when the traveling vehicle body 40 reaches the end of the ridge and does not touch the ground, it further rotates downward. A ridge sensor stay 182a is provided to support the first ridge sensor 182, which operates and activates a notification device 181 that informs the operator that the field edge has been reached. The notification device 181 is a communication device that notifies a buzzer or a lamp attached to each part of the traveling vehicle body 40, or an information terminal (tablet, smartphone, etc.) of an operator.

The first ridge sensor 182 is provided with a sensor arm 183 rotatably, and a ridge grounding roller 184 is rotatably attached to a lower portion of the sensor arm 183, and the sensor arm 183 is urged downward. A spring 185 is provided, and a first ridge detection switch 186 that turns on (or turns off) when the angle exceeds a predetermined angle is provided at the base of the sensor arm 183. The grounding urging spring 185 is configured such that the upper end side is attached to the detection adjustment plate 187 whose angle can be adjusted along the elongated hole, and the operating angle can be changed according to the ridge height.

The first ridge sensor 182 is brought into contact with the ridge surface by adjusting the vehicle height of the traveling vehicle body 40 at the start of the seedling planting work traveling. By grounding the rotatable ridge surface grounding roller 184, the ridge surface is not easily broken and fine irregularities can be leveled, so that the seedling planting accuracy can be improved.

Then, when the traveling vehicle body 40 continues to move forward and reaches the end of the ridge and the ridge surface grounding roller 184 does not come into contact with the ridge surface, the urging force of the grounding urging spring 185, the sensor arm 183, and the ridge surface grounding roller Due to the weight of 184, the sensor arm 183 rotates downward, and the first ridge detection switch 186 is not pressed. When the first ridge detection switch 186 is no longer pressed, the notification device 181 is energized to operate the notification device 181 to notify the operator that the vicinity of the front end of the traveling vehicle body 40 has reached the ridge. ..

When the first ridge sensor 182 detects the ridge, there is still space for planting several plants in the ridge, so the operator does not stop the aircraft immediately, but the remaining planting. While throwing the number of seedlings to be planted in the attached space into the seedling supply device 43, the stop operation is prepared.

As a result, the operator can know the approach to the ridge without looking back, so that the aircraft can be stopped at the timing when the seedlings are planted on the ridge, and fuel consumption due to extra running and the next It is prevented that the moving distance to the work line is long.

Further, since the number of seedlings to be put into the seedling supply device 43 can be adjusted when the ridges are approaching, even if the planting hoppers 20a and 20b perform the planting operation due to the delay in the stop operation of the planting work running, the ridges are ridged. It is prevented that seedlings are released to places other than

As shown in FIGS. 4, 6 and 7, the sensor arms 183 are paired left and right sensor arms 183a and 183a, and the ridge surface grounding rollers 184 are rotatably mounted on the left and right ridge surface grounding rollers 184a and 184a, respectively. However, the left and right first ridge detection switches 186 and 186 may be provided respectively.

As a result, when either one of the left and right sensor arms 183 and 183 rotates downward and one of the corresponding first ridge detection switches 186 and 186 is not pressed, the notification device 181 operates and the ridges are activated. Even if the edges are collapsed due to wind and rain and the shape is disturbed, the ridges can be easily detected, and the operator can perform the planting work running stop operation at the right time.

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 position of the rotation axis at the front 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 turning the airframe, 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. 15 and 16, 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 supports an end of a 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. Provide.

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 between 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 circumference 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. 15 (c), the regulation spacer 308 has a U-shape when viewed from the front so as to surely contact 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 damaged.

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 for adjusting the vehicle height of the vehicle body 40, and the operation is 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 drop in vehicle height due to its own weight is prevented.

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 cooperation 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 elevating hydraulic cylinder 300 by operating the high adjustment lever 123 can be suppressed to be smaller, 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 of the fuselage, and is located on the rear side of the fuselage with respect to the rear 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 from the rear end of the fuselage frame 19 to the left and right, 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 5, 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.

As shown in FIGS. 9 to 14, 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 move up and down on the transmission case 26 on the front end side. It is mounted rotatably, and the rear end side is mounted rotatably between the left and right of the left and right link holders 210 and 210. 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 the position where the planting hopper 20a, 20b is located in the static trajectory of the planting hoppers 20a, 20b from the time when the seedlings are received until the bottom dead center is reached. 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, the seedlings to be thrown by the operator are transported to a predetermined position and planted at the drop supply position of the seedling supply device 43. Since the upper ends of the hoppers 20a and 20b can be brought close to each other, 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.

As described above, the rear ends of the upper and lower link arms 21a and 21b are mounted between the left and right of the left and right link holders 210 and 210 with a vertical interval. At this time, the mounting 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 is increased. 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 near 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 the 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. 10 to 14 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 formed by bending the upper side into an L shape toward the front side of the machine body 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-strip adjustment plate 222 in a side view, and the inter-strip 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 arbitrarily 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 inter-row adjustment plate 222 is provided at the rear part of the vertical movement mechanism 21, it is possible to prevent the inter-row adjustment plate 222 from hindering the left-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 nut attachment / detachment tool 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 and 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 hopper holder 225 on the rear side and the wall surface on the rear side of the hopper cover 226, respectively, and the rotation support shafts 227 and 227 are provided with rotation arms, respectively. 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 interstitial adjustment plate 222 and without a large front-rear distance from the link holders 210 and 210. 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. 13, a gear in which irregularities in the left and right directions alternately mesh with each other on the upper side of the front and rear surfaces. 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-rear direction.

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 or slightly smaller than the uppermost portion of the left and right hopper constituents 231,231, 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 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 outer peripheral portion of the cylinder to provide two seedling accommodating bodies 22. 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.

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 has a circular shape and is arranged 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 wheels 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.

The worker sits on the work seat 46 or stands on the floor step 122 to supply the seedlings to the seedling supply device 43, but when the seedlings for replenishment are exhausted or some problem, for example, the planting posture of the seedlings When abnormalities occur continuously, seedlings cannot be planted, etc., it is necessary to stop the running of the traveling vehicle body 40 and stop the driving of the planting hoppers 20a and 20b. Further, when the traveling speed or the ascending / descending pace of the planting hoppers 20a and 20b is faster than the pace of the worker, it is necessary to reduce the output of the engine 41 and change the speed so that the work can be easily performed.

As shown in FIGS. 4 and 5, the above operation is performed on the front side of the machine body of the seedling supply device 43 and on the left and right side ends so that the above operation can be performed while sitting on the work seat 46 or without getting off the floor step 122. That is, on the right-hand side of the worker seated in the work seat 46, a second engine switch 408 for switching whether the engine 41 can be started or not and for performing a stop operation is provided, and the inside of the machine body (inside the second engine switch 408). A second throttle lever 409 for increasing or decreasing the output of the engine 41 is provided at a position closer to the left and right sides of the machine body so as to be rotatable in the left and right direction of the machine body.

The second engine switch 408 is operated in the same manner as the first engine switch 407, but the engine 41 is not operated unless both the first engine switch 407 and the second engine switch 408 are operated in the on position. It shall not start.

As a result, when the operator grips the control handle 47 behind the aircraft and steers it when moving, the first engine switch 407 can be used to stop the operation, and the operator is on the traveling vehicle body 40 when planting seedlings. At this time, the engine 41 can be stopped by turning off the second engine switch 408, so that it is not necessary to get off the traveling vehicle body 40 and go to turn off the first engine switch 407 during boarding. The operation that causes the problem can be interrupted.

Further, since the second throttle lever 409 can be operated from above the traveling vehicle body 40, it is not necessary to get on and off the traveling vehicle body 40 when increasing or decreasing the output of the engine 41, and the work efficiency and work accuracy are improved.

The second throttle lever 409 is necessary because it is not operated so frequently and is arranged near the position where the worker puts the seedlings into the seedling supply device 43, although it depends on the work content. When not, it is desirable to be in a position that does not interfere with the movement of the worker's arm.

In order to realize this, as shown in FIG. 25, a storage space portion 409a into which the second throttle lever 409 can enter is formed on the front side of the seedling supply device 43, and a second storage space portion 409a is formed inside the storage space portion 409a. 2 A storage spring 410 for urging the throttle lever 409 is arranged on the pulling side. The second throttle lever 409 has a configuration in which it cannot rotate in contact with the left and right side walls of the storage space portion 409a unless it is pulled out to the front side of the machine to some extent, and is retracted into the storage space portion 409a when the operator releases the hand. To do.

As a result, when the second throttle lever 409 is not operated, the amount of protrusion of the second throttle lever 409 from the seedling supply device 43 to the front of the machine body can be suppressed by allowing the second throttle lever 409 to enter the storage space 409a. It is prevented that the hand of the engine comes into contact with the second throttle lever 409 and an unintended change in the output of the engine 41 occurs.

Alternatively, as shown in FIG. 26, a throttle arm 409b provided on the seedling supply device 43 side, an operation arm 409c rotatably provided on the front end portion of the throttle arm 409b, and the operation arm. An urging spring 411 for urging the 409c on the rear side of the machine body and upward may be provided, and when the operation arm 409c is not operated, the seedling supply device 43 may be in contact with the front part of the machine body.

As a result, when the second throttle lever 409 is not operated, the amount of protrusion of the second throttle lever 409 from the seedling supply device 43 to the front of the machine body can be suppressed by rotating the seedling supply device 43 side. It is prevented that the operator's hand comes into contact with the second throttle lever 409 and an unintended change in the output of the engine 41 occurs.

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.

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, so that the left and right planting hoppers 20a and 20b are fully supplied. The structure is such that seedlings can be supplied accordingly.

In the transplanter 10 of the present embodiment, the soil-covering suppression rings 37 used for soil-covering and suppressing the seedlings planted by the left and right planting hoppers 20a and 20b are used to plant the seedlings 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 suppression rings 37 are formed by bending one bar material into a J shape in a plan view, and are formed by separately rotating the suppression arms 370 and 370, respectively, and the left and right suppression arms 370 and 370. It is composed of a compression rotating body 371, 371, which is provided on the rear side in a pair of left and right directions so as to be rotatable.

The suppression arm 370 is mounted on the rear side of the traveling vehicle body 40 so as to be vertically rotatable at one end located inside the machine body, and after the rear portion of the straight portion protruding rearward is bent upward. It is bent outward of the fuselage and then bent downward to the front of the fuselage at the same vertical position as the straight part inside the fuselage. Of the left and right compression rotating bodies 371 and 371, the compression rotating body 371 on the outside of the machine body is provided on the straight portion on the outside of the machine body that bends toward the front side of the machine body, and the pressure rotating body 371 on the inside of the machine body is attached to the straight line portion on the inside of the machine body. Will be done.

With the above configuration, an avoidance portion 372 protruding upward from the machine body is formed at the rear portion of the suppression arm 370, and the left and right suppression rotating bodies 371 and 371 are arranged at a left-right interval. As a result, the seedlings planted by the planting hoppers 20a and 20b pass through the left and right spacing portions of the left and right suppression rotating bodies 371 and 371, level the surrounding soil, and pass below the avoidance portion 372. It is prevented from being pushed down by the soil covering pressure wheels 37 and 37 and disturbing the planting posture.

The left and right suppression arms 370 and 370 are respectively mounted so that the left and right positions of the machine body can be adjusted, and the position of suppression can be changed according to the inter-row setting of the planting hoppers 20a and 20b. In addition, if the left and right positions of the left and right suppression rotating bodies 371 and 371 are also adjustable so that the left and right positions can be adjusted, the soil around the seedlings after planting can be surely solidified, and the seedlings may grow poorly due to lodging or low temperature. Be prevented.

The field where the traveling vehicle body 40 works is not flat in a mountainous area or the like, and there are places where the traveling vehicle body 40 is inclined. The transplanter is equipped with heavy objects such as a transmission case 26, a seedling supply device 43, and planting hoppers 20a and 20b on the rear side in the traveling direction, and the front side of the machine body tends to be lifted on an uphill slope. In order to suppress this, the engine 41 and the mission case 39 are arranged on the front side of the traveling vehicle body 40, and the work seat 46 on which the worker is boarded is arranged to balance the weight of the front and rear, but it still depends on the tilting work place. The front side of the aircraft may be lifted, and the aircraft may be in a forward tilted posture. As a result, the seedlings are planted on the ridges in a backward inclined posture, which not only makes the appearance unattractive but also may hinder the growth. In particular, as the work progresses, the fuel in the fuel tank is consumed, and the number of seedlings for replenishment loaded on the spare seedling frame 50 decreases, so that the weight on the front side of the machine fluctuates, and the posture tends to rise forward. Tend.

Further, when seedlings are put into the planting hoppers 20a and 20b from the seedling supply device 43, the seedlings do not enter the upper opening of the planting hoppers 20a and 20b and fall into the field and are originally planted. Then there is a risk of stock shortage. Even if the seedlings enter the planting hoppers 20a and 20b, they are thrown closer to the rear side of the machine body in the planting hoppers 20a and 20b, so that the planting posture may be disturbed due to the front-rear inclination of the traveling vehicle body 40. is there.

Further, if the inclination angle becomes too large, the traveling vehicle body 40 may fall over, the loaded seedlings may be scattered in the field, and it may take time and effort to collect the seedlings. ..

In order to prevent this, as shown in FIGS. 27 and 28, when the traveling vehicle body 40 rotates by a predetermined angle or more on the mounting base side of the left and right suppression arms 370 and 370, they come into contact with the left and right suppression arms 370 and 370. Left and right excess tilt sensors 194 and 194 are provided, respectively. The left and right excess tilt sensors 194 and 194 are in a posture in which the traveling vehicle body 40 is tilted forward by a predetermined angle (example: 5 to 10 degrees) or more when either the left or right side is pressed to enter the detection state. After determining, the engine 41 is stopped, or the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26 is cut off in the mission case 39.

The engine 41 is stopped by operating a stop actuator 41a such as a solenoid. Further, in order to cut off the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26, the traveling transmission actuator 38a for switching the on / off of the traveling clutch (not shown) built in the transmission case 39, and the planting clutch (not shown). ) Is operated by operating the planting transmission actuator 26a for switching on / off, or by operating the main transmission actuator 125a for turning on / off the main clutch (not shown) on the better side of transmission than the traveling clutch and the planting clutch. And.

As a result, when the traveling vehicle body 40 is in an inclined posture unsuitable for the seedling planting work, the planting work running is automatically stopped, so that the seedling planting posture is prevented from being disturbed and each part of the machine body is damaged due to a fall. Is prevented.

Further, as shown in FIGS. 27 and 29, when either the left or right of the left and right excess tilt sensors 194 and 194 is in the detection state, the planting work running is stopped, so that the traveling vehicle body 40 is tilted in the left and right direction of the machine body. However, it is possible to detect an excessive forward tilt.

When the left and right excess tilt sensors 194 and 194 are in the detection state, it is necessary to apply a load to the front side of the machine body, so a balance weight (not shown) mounting portion is formed on the bumper 109 or the like.

The above-mentioned forward tilt of the traveling vehicle body 40 becomes a problem when it occurs during the planting work, but when the seedlings are not planted, for example, when moving to a field or when loading or unloading on a transportation means such as a light truck. Since the operator is maneuvering with the control handle 47 from the rear of the machine body, there is no particular problem and it cannot occur in the first place. However, when overcoming a step or moving the Ayumi to be moved to the loading platform, it is necessary to incline the traveling vehicle body 40 forward above the inclination angle detected by the left and right excess inclination sensors 194 and 194. At this time, if the engine 41 or the traveling transmission is stopped, the operator must manually move the traveling vehicle body 40, which requires extra labor and restarts the engine 41. In addition, there is a problem that extra labor and fuel consumption are required.

In order to prevent this, a boarding detection sensor 195 for detecting the boarding of the worker is provided on either one or both of the work seat 46 and the central step 119 of the floor step 122. If the left and right excess tilt sensors 194 and 194 detect excessive tilt while the boarding detection sensor 195 detects the worker's boarding, the engine 41 or the running and planting transmission is stopped, and the worker's When boarding is not detected, the circuit configuration is such that the engine 41 or running and planting transmission are not stopped even if the left and right excess tilt sensors 194 and 194 detect excessive tilt.

As a result, when the planting work is not performed, the traveling vehicle body 40 can be continuously moved by the driving force, so that the work efficiency is improved and the labor of the operator is reduced.

The boarding detection sensor 195 erroneously detects the worker's boarding based on the weight of the luggage loaded on the aircraft (for example, an empty box containing seedlings, an information terminal, a water bottle or a PET bottle). In order to prevent this, it is desirable to set the load considered to be detection to a predetermined weight (eg, 30 to 40 kg) or more so that the operator can be reliably detected.

Further, in order to prevent erroneous detection, as shown in FIG. 30, the first ridge sensor 182 is in a state of not detecting the arrival at the ridge, and either one of the left and right excess tilt sensors 194 and 194 is used. , Or both may be in the detection state. In a place not passing over the ridge, the sensor arm 183 of the first ridge sensor 182 is rotating downward to always detect the ridge, and the ground is uneven in the forward tilted posture. Since it is difficult to make contact even if there is, it is possible to prevent the engine 41, running, and planting transmission from stopping due to false detection.

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.

The ridge surface sensor 14 rotates downward when it does not touch the ground beyond the ridge end, and at that time, lowers the vehicle height of the traveling vehicle body 40. As a result, the worker needs to adjust the vehicle height again at the ridge for the next planting work, so that the planting work height is adjusted appropriately and the seedling planting accuracy is improved.

As shown in FIG. 31, on one side of the ridge surface sensor 14 on the left and right sides of the machine body, the traveling vehicle body 40 is planted with seedlings by grounding together with the ridge surface sensor 14 and rotating upward, and when reaching the ridge end, rotating downward. A second ridge sensor 188 for detecting that the position exceeding the attached space has been reached is provided. The second ridge sensor 188 is provided with a ridge detection rotation arm 189 rotatably provided on one side of the ridge sensor 14 on the left and right sides of the machine body, and a ridge detection ground plate is provided below the ridge detection rotation arm 189. The 190 and the second ridge detection switch 191 are provided so that when the ridge detection ground plate 190 rotates downward, the ridge detection rotation arm 189 is separated and put into an on (or off) state.

As shown in FIGS. 27 and 32, when the second ridge detection switch 191 detects a ridge while the first ridge detection switch 186 is detecting the ridge, the engine 41 is stopped or the engine 41 is stopped. The configuration is such that the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26 in the mission case 39 is blocked.

With the above configuration, after all the seedlings have been planted in the seedling planting space, running and planting transmission are blocked before leaving the ridges, so that extra running and planting operations are prevented, and fuel consumption is suppressed. , Seedlings are released in places other than the ridges and are prevented from falling to the ground.

Further, if both the first ridge sensor 182 and the second ridge sensor 188 do not detect the ridge, traveling and planting transmission are not blocked. Therefore, for example, the second ridge sensor 188 is caused by a large dent formed on the ridge surface. Is rotated downward and the second ridge detection switch 191 is in the detection state, the planting work running is not interrupted, and a decrease in work efficiency is prevented.

Further, since the first ridge sensor 182 and the second ridge sensor 188 are arranged apart from each other in the front-rear direction of the machine body, a large dent is generated in the middle of the ridge, and the first ridge sensor 182 and the second ridge sensor 182 and the second ridge are formed. Even if there are places where the end sensors 188 rotate significantly downward, if one of them is in contact with the ground, the planting work running will not be interrupted, and a decrease in work efficiency will be prevented.

Instead of the second ridge sensor 188, the ridge sensor 14 and the left and right excess tilt sensors 194 and 194 may be used to stop the traveling vehicle body 40 at the ridge.

As shown in FIG. 33, when the traveling vehicle body 40 advances and the ridge sensor 14 rotates downward away from the ridge surface, the lifting hydraulic cylinder 300 extends and the left and right traveling transmission cases 38 and 38 rotate upward. , Lower the vehicle height of the traveling vehicle body 40. At this time, since the left and right soil covering suppression wheels 37 and 37 are still in contact with the ridge surface, the left and right suppression arms 370 and 370 rotate upward and come into contact with the left and right excess tilt sensors 194 and 194. ..

As a result, the engine 41 or the traveling and planting transmission is stopped, and the traveling vehicle body 40 can be stopped at the position where the seedlings are planted at the ridges and in the planting space on the ridges. Consumption is prevented.

The second ridge sensor 188 is added to the above configuration, and the left and right excess tilt sensors 194 and 194 are in the detection state with both the first ridge sensor 182 and the second ridge sensor 188 detecting the ridge. Then, the engine 41, or the traveling and planting transmission may be stopped.

As shown in FIG. 34, by using the second ridge sensor 188, the first ridge sensor 182 in a state of being in contact with the ridge surface is rotated upward by the convex portion of the ridge surface, and left and right by the convex portion of the ridge surface. Even if the suppression arms 370 and 370 of the above rotate upward and come into contact with the excess tilt sensors 194 and 194, the traveling and planting transmission do not stop, so that the prevention of erroneous detection can be more firmly prevented.

In this configuration, when the left and right suppression arms 370 and 370 come into contact with the left and right excess tilt sensors 194 and 194 while the first ridge sensor 182 does not detect the ridge, the engine 41, or running and planting. The condition for stopping the transmission is set so that the traveling vehicle body 40 is reliably stopped when the traveling vehicle body 40 is in the forward tilted posture. The first ridge sensor 182 is configured to be in a state of being in contact with the ridge surface at a forward upward inclination angle at which the left and right suppression arms 370 and 370 contact the left and right excess inclination sensors 194 and 194.

The transplanter of this case is provided with a work seat 46 on which the worker sits so that the worker who supplies the seedlings can get on the seedling supply device 43 to perform the seedling supply 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 transplanter 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 and 20, 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, in this case, the right side of the machine body (work seat). As shown in FIGS. 4, 5 and 20, a maneuvering unit 126 on the vehicle body is provided at the end of the left side with respect to the operator seated on the 46.

The on-vehicle 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 vehicle body. 2 The second main clutch lever 129 is arranged inside the machine body from the vehicle height adjusting lever 128.

Since it is basically not necessary to fix the vehicle height during the planting of seedlings, the second vehicle height adjusting lever 128 has 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 to be 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, 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 is prevented from meandering in the left-right direction.

Further, the vehicle height adjusting lever guide 130 and the main clutch lever guide 131, that is, the work of getting on the work seat 46 by forming the vertical space S between the upper and lower parts of the vehicle body upper control unit 126 and the side step 118. The movement of the person's legs 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 the upper part of the seedling mounting column 51 projecting to the outside of the traveling vehicle body 40, and the support stay 52 can switch 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. One side end of a mounting table 55 on which a container such as a seedling box or a seedling tray is placed is attached.

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 of the boardable portion of the traveling vehicle body 40, and the foot protrudes from the traveling vehicle body 40 and the posture. 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 traveling vehicle 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 of contacting the vicinity of the front end of the seedling supply device 43, so that it is possible to prevent sand and rainwater from adhering to the seated portion of the worker when the work is interrupted.

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 FIGS. 1 to 4, the transplanter of this case is provided with water tank holders 601 for loading the water tanks 600 in the left and right traveling transmission cases 38 and 38, respectively.

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 positions where the planting hoppers 20a and 20b plant the 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 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. 17, 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 inserted into 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.

A water absorption pipe for sucking water in the water tank 600 is attached to the tip of the water absorption hose 721. The water absorption pipe is equipped with a filter, for example, a net material formed in a columnar shape around the water absorption port so as to suck only water without sucking in impurities such as sand that has entered the water tank 600. This mesh-like filter has the effect of sucking in water while preventing the ingress of impurities, but the strength cannot be secured even if it is made of metal, and the operator may accidentally squeeze it when attaching it to the water absorption hose 721. , I sometimes stepped on it and broke it.

In order to prevent this, as shown in FIGS. 35 (a) and 35 (b), a first water absorption cover 727 made of a metal or hard resin cylinder having a plurality of small holes 727a formed on the outer peripheral portion of the water absorption pipe 726 is provided. It is provided so that water can enter the water supply pipe 726 through the water absorption cover 727.

According to the above, it is possible to secure strength that does not easily deform even when gripped or stepped on, and it is possible to increase the weight of the water absorption pipe 726, so that the water absorption hose 721 is prevented from floating due to buoyancy, and the water absorption hose 721 is prevented from floating in the water tank 600. Water can be sucked out efficiently.

Instead of the first water absorption cover 727, a second water absorption cover 728 may be used, in which a plurality of vertical slits 728a are formed at predetermined intervals along the outer peripheral portion shown in FIG. 35 (c).

As a result, water can be taken in from the slit 728a which is long in the vertical direction, so that it is not necessary to excessively increase the output of the irrigation pump 700, and the cost can be reduced.

There is no problem with the water stored in the water tank 600 as long as the capacity is large, but the closer it is to the bottom, the more difficult it is for the water absorption pipe 726 to suck in water, and the water still remains in the water tank 600. Nevertheless, water must be replenished.

In order to solve this problem, as shown in FIG. 36, a suction outlet 729 for mounting the water absorption hose 721 in a posture substantially horizontal to the bottom surface is formed near the bottom of the water tank 600.

As a result, the water absorption hose 721 sucks out water from the bottom side of the water tank 600, so that it is easy to suck out water even when the remaining amount of water is low, and the water stored in the water tank 600 is efficiently sucked out and used for irrigation. can do.

The transplanter according to the present invention can be applied to stabilize the running posture of the transplanter for planting seedlings, and has high industrial applicability.

20a Planting hopper (planting device)
20b Planting hopper (planting device)
37 Soil cover suppression wheel (suppression device)
40 Traveling vehicle body 44 Rear wheels (traveling device)
47 Steering wheel 181 Notification device 182 1st ridge sensor (1st ridge detection member)
188 Second ridge detection sensor (second ridge detection member)
194 Excess tilt sensor (stop member)
195 Boarding detection sensor (boarding detection member)
370 Suppression arm 371 Suppression rotating body

Claims (5)

To run the line body (40), the run line device (44) and the planting device (20a, 20b) transplanter providing,
At the rear of the traveling vehicle body (40), a pressure-reducing device (37) for leveling the soil around the seedlings planted by the planting device (20a, 20b) is rotatably provided.
When inclination oblique angle of the vehicle body (40) is equal to or greater than a predetermined angle, the stop member for stopping the transmission of the the suppression device (37) the traveling device contacts (44) and the planting device (20a, 20b) A transplanter characterized by the provision of (194). It is composed of left and right suppression arms (370,370) rotatably attached to the traveling vehicle body (40) and suppression rotating bodies (371, 371) provided on the left and right suppression arms (370,370).
A pair of left and right stop members (194) are provided, and when either one of the left and right stop members (194, 194) comes into contact with the suppression arm (370, 370), the traveling device (44) and the planting device (20a, 20b) are provided. The transplanter according to claim 1 , wherein the transmission to) is stopped. A boarding detection member (195) for detecting whether or not an operator is on board is provided on the traveling vehicle body (40).
When the boarding detection member (195) is not detected, even if the traveling vehicle body (40) is tilted by a predetermined angle or more, the stopping member (194) still has the traveling device (44) and the planting device (20a, 20b). The transplanter according to claim 1 or 2, wherein the transmission to) is not stopped. A first ridge end detection member (182) for operating the notification device (181) when the end of the ridge is detected is provided on the front side of the traveling vehicle body (40).
If the first ridge detection member (182) is not in the non-detection state and the boarding detection member (195) is not in the detection state, the stop member (194) has the traveling vehicle body (40) at a predetermined angle or more. The transplanter according to claim 3, wherein the transmission to the traveling device (44) and the planting device (20a, 20b) is not stopped even when the posture is tilted forward. When the end of the ridge is detected while the first ridge detecting member (182) is in the detection state, the second ridge ends that stop the transmission to the traveling device (44) and the planting device (20a, 20b). A detection member (188) is provided on the rear side of the machine body with respect to the first ridge detection member (182).
The stop of transmission to the traveling device (44) and the planting device (20a, 20b) is detected by the first ridge detecting member (182) and the second ridge detecting member (188), respectively. The transplanter according to claim 4, wherein when the boarding detection member (195) is in the detection state, transmission to the traveling device (44) and the planting device (20a, 20b) is stopped.