transplant machine

Abstract

To provide a transplanter which can support an inclination of a vehicle body even when an inter-row state changes and right-left soil-packing arms are moved in a right-left direction of the machine body.SOLUTION: A soil-packing device (37) is provided for leveling the soil around a seedling planted by a transplanter. The soil-packing device (37) includes: right-left soil-packing arms (370, 370) rotationally attached to a vehicle body; and soil-packing rotors (371, 371) provided to the right-left soil-packing arms (370, 370). When an inclination angle of the vehicle body in a front-rear direction is a predefined angle or more, a stopping member stops a travel device and the transplanter by being into contact with the soil-packing device (37). Pressing pins (370b, 370b) provided to work pieces (370a, 370a) extending from an attachment base part of the right-left soil-packing arms (370, 370) drive the stopping member.SELECTED DRAWING: Figure 22

Description

[Technical Field]

[0001] The present invention relates to a transplanter for transplanting vegetable seedlings such as onions and lettuce into farm fields. [Background technology]

[0002] Paragraph 0210 of Patent Document 1 describes that left and right excessive tilt sensors 194, 194 are provided that come into contact with left and right suppression arms 370, 370 when the traveling vehicle body 40 rotates by a predetermined angle or more. When either the left or right excessive tilt sensor 194, 194 is pressed and enters a detection state, it determines that the traveling vehicle body 40 is in a position where it is tilted forward upward by a predetermined angle (e.g., 5 to 10 degrees) or more, and stops the engine 41 or cuts off the transmission of driving force to the left and right traveling transmission cases 38 and transmission case 26 within the transmission case 39. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2020-184949 Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the present invention is to provide a transplanter that can respond to tilting even when the row spacing is changed and the left and right suppression arms are moved in the left and right directions of the machine body. [Means for solving the problem]

[0005] The invention of claim 1 provides a transplanter having a traveling vehicle body (40) provided with a traveling device (44) and planting devices (20a, 20b), A rotatable pressure device (37) is provided to level the soil around the seedlings planted by the planting devices (20a, 20b), and The suppression device (37) is composed of left and right suppression arms (370, 370) rotatably mounted on the traveling vehicle body (40), and suppression rotors (371, 371) provided on the left and right suppression arms (370, 370), a stopping member (194) that comes into contact with the crushing device (37) to stop the traveling device (44) and the planting device (20a, 20b) when the inclination angle in the longitudinal direction of the traveling body (40) becomes equal to or greater than a predetermined angle; This transplanter is characterized in that the pressing pins (370b, 370b) provided on the operating pieces (370a, 370a) extending from the mounting bases of the left and right suppression arms (370, 370) operate the stopping member (194).

[0006] The invention described in claim 2 is configured such that the left and right suppression arms (370, 370) are movable in the left and right directions of the machine body, The pressing pins (370b, 370b) are configured to extend on both the left and right sides of the operating pieces (370a, 370a), The transplanter according to claim 1, characterized in that when the row spacing is narrowed by moving the left and right suppression arms (370, 370) inward in the left-right direction of the machine body, the stopping members (194) are activated by the outward extending portions of the pressing pins (370b, 370b), and when the row spacing is widened by moving the arms outward in the left-right direction of the machine body, the stopping members (194) are activated by the inward extending portions of the pressing pins (370b, 370b).

[0007] According to the invention of claim 3, a seat detection sensor (195) for detecting the seating of an operator is provided on the work seat (46), and when the seat detection sensor (195) detects the seating of an operator, if the stopping member (194) detects an inclination of a predetermined angle or more, the traveling device (44) and the planting device (20a, 20b) are stopped, and when the seating of an operator is not detected, the stopping member (194) does not stop the traveling device (44) and the planting device (20a, 20b) even if it detects an inclination of a predetermined angle or more. The work seat (46) is provided with a seat support plate (506) at the bottom, At the rear of the seat support plate (506), a seat support arm (507) is extended downward, and a pivot support pin (508) for rotation in the left-right direction of the aircraft body is provided at the lower part of the seat support arm (507). A front support member (509) for supporting the front of the work seat (46) is provided at the front of the seat support plate (506). The transplanter according to claim 2, characterized in that a pressing member (510) is provided at a position slightly rearward of the front support member (509) of the seat support plate (506) to press the seating detection sensor (195) through a through-hole (505) of the seat mounting frame (501). [Effects of the Invention]

[0008] According to the present invention, when changing the row spacing of the suppression device, there is no need to adjust the position of the pressing pin or the position of the stopping member, which improves workability. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a left side view of a transplanter according to an embodiment of the present invention. [Figure 2] Right side view of the same transplanter [Figure 3] Rear view of the same transplanter [Figure 4] Front view of the same transplanter [Figure 5] Plan view of the same transplanter [Figure 6] FIG. 1 is a perspective view of the main part of the front side of the transplanter; [Figure 7] Plan view of the main part of the front side of the transplanter [Figure 8] FIG. 1 is a perspective view of the main part of the front side of the transplanter; [Figure 9] A side view of the main part of the front side of the transplanter [Figure 10] FIG. 1 is a perspective view of the main part of the rear side of the transplanter; [Figure 11] Side view of the main part of the same transplanter [Figure 12] Electrical circuit diagram of the same transplanter [Figure 13] FIG. 10 is a side view showing the essential parts of a transplanter according to another embodiment of the present invention. [Figure 14]FIG. 10 is a cross-sectional side view of a main part of a transplanter according to another embodiment of the present invention. [Figure 15] FIG. 10 is an electrical circuit diagram showing another embodiment of the same. [Figure 16] FIG. 10 is a side view showing the essential parts of a transplanter according to another embodiment of the present invention. [Figure 17] 1 is a perspective view of a main part of an embodiment of the present invention; [Figure 18] FIG. 1 is a plan view of a main part of an embodiment of the present invention; [Figure 19] 1 is a perspective view of a main part of an embodiment of the present invention; [Figure 20] FIG. 1 is a plan view of a main part of an embodiment of the present invention; [Figure 21] FIG. 10 is a plan view of a main part showing another embodiment of the present invention. [Figure 22] 1 is a rear view of a main part of an embodiment of the present invention; [Figure 23] 1 is a rear view of a main part of an embodiment of the present invention; [Figure 24] FIG. 10 is a perspective view of a main part for explaining the operation of another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Preferred embodiments of the present invention will now be described with reference to the drawings.

[0011] FIG. 1 is a left side view showing a transplanter 10 for transplanting seedlings as an example of a transplanter according to an embodiment of the present invention, FIG. 2 is a right side view, FIG. 3 is a rear view, FIG. 4 is a front view, and FIG. 5 is a plan view.

[0012] In the following description, the side where the control handle 47 is located will be referred to as the rear, and the opposite side, i.e., the side where the engine 41 is located, will be referred to as the front. The right-hand side facing the front of the aircraft will be referred to as the right, and the left-hand side will be referred to as the left.

[0013] As shown in Figures 1 to 5, the transplanter 10 of this embodiment is equipped with a running body 40 that allows the machine to move forward, a control handle 47 for walking and controlling the machine provided at the rear of the running body 40, a planting device 42 that plants seedlings in the field, and a seedling supplying device 43 that supplies seedlings to the planting device 42.

[0014] The traveling vehicle body 40 has a transmission case 39 at the front of the body, and an engine 41, which serves as a drive unit, mounted in front of the transmission case 39. Axle covers 101, which cover axles with adjustable treads that change the left and right positions of the rear wheels 44, are connected to the lower rear side of the body on both the left and right sides of the transmission case 39, and traveling transmission cases 38, which transmit driving force to the rear wheels 44 mounted on the rear side of the body, are attached to the outer ends of the axle covers 101 so as to be vertically rotatable.

[0015] A base plate 400 is attached to the transmission case 26, which receives power from the transmission case 39 and branches it to supply the planting device 42 and the seedling supply device 43. The base plate 400 covers at least the left and right side surfaces and the rear of the transmission case 26. A frame stay 401 is detachably attached to the rear of the base plate 400 via fastening members such as bolts. A handle frame 402 is attached to the frame stay 401 and protrudes in an arc toward the upper rear of the machine. A control unit 403 is attached to the rear of the handle frame 402 to adjust the vehicle height and turn the power transmission on and off for traveling and planting work. A control handle 47 is also attached to the rear of the handle frame 402, which the operator grips when operating the machine when traveling without planting seedlings. The control handle 47 is shaped to bend laterally and toward the rear of the machine around the handle frame 402. Side clutch control levers 405 for turning the power transmission to the rear wheels 44 on and off are attached to the left and right rear ends, respectively. Further, a first throttle lever 406 for increasing or decreasing the output of the engine 41 is provided on either the left or right side of the control handle 47.

[0016] An operation panel 47a is provided between the left and right sides of the operation handle 47, and on the operation panel 47a are provided a vehicle height adjustment lever 123 that adjusts the height of the running body 40 by extending and retracting the lifting hydraulic cylinder 300, a main clutch lever 125 that switches on and off the transmission of driving force to the left and right running transmission cases 38 and the transmission case 26, a first engine switch 407 that switches whether the engine 41 can be started and also stops it, and a main speed change lever 150 that switches the running transmission of the running body 40 between travel speed, planting work speed, running neutral, and reverse.

[0017] To permit the engine 41 to start, the operator pushes in and rotates the first engine switch 407 to the ON position. When the start operation of the engine 41 is performed, the engine 41 starts. The engine 41 may be started using a starter or a recoil starter. Furthermore, even when a drive device other than the engine 41 is used, such as an electric motor, the electric motor is energized when the first engine switch 407 is in the ON position, and the engine is started.

[0018] When stopping the engine 41, the operator lightly presses the first engine switch 407, which is switched to the off position by the force of an internal torque spring (not shown), thereby bringing the engine 41 into a stopped state.

[0019] To shut off the machine, simply lightly press the first engine switch 407, which immediately stops travel and planting. This means that travel and planting immediately stop when the machine reaches the edge of the furrow, preventing seedlings from being planted in areas other than furrows and reducing the amount of seedlings consumed. Furthermore, since no extra movement is required when moving the machine to the next furrow for planting, fuel consumption and work time are reduced.

[0020] A seedling supply device 43, which will be described later, is provided on the front side of the operating handle 47 and above the transmission case 26. The seedling supply device 43 transports seedlings inserted by the operator to the left and right planting hoppers 20a, 20b. A reinforcing frame 152 is provided in the front-rear direction, extending from the rear of the seedling supply device 43 to a reinforcing connecting stay 151 provided on the upper rear side of the handle frame 402 and in front of the operating panel 47a, to improve the strength of the areas around the operating handle 47 and seedling supply device 43 and reduce vibration.

[0021] A rotation support plate 153, which is L-shaped in side view, is attached between the front and rear of the reinforcing frame 152 in a position where it protrudes toward the other left or right side of the machine body (the right side of the machine body) in rear view. The rotation support plate 153 is open on both the left and right sides of the machine body, and the base of a viewing rotation arm 154 is rotatably attached to this open side. The viewing rotation arm 154 is rotatable toward one left or right side of the machine body (the left side of the machine body) until it contacts the handle frame 402, and is rotatable toward the other left or right side of the machine body until it contacts the rotation support plate 153. In other words, when the viewing rotation arm 154 is rotated toward the other left or right side of the machine body, the rotation of the rotation support plate 153 is restricted by a rotation restriction portion 153a located on the lower side of the machine body at a position where the seedling supply device 43 and the viewing rotation arm 154 are approximately parallel or inclined downward toward the outside of the machine body.

[0022] In addition, below the part where the visual rotation arm 154 is installed, the left / right other side up / down movement mechanism 21 that raises and lowers the planting hopper 20b on the other left / right side of the machine body is arranged so that it can rotate up and down, but the visual rotation arm 154 that has been rotated to the other left / right side of the machine body until it comes into contact with the rotation control part 153a is arranged to be positioned higher on the machine body than the up / down movement mechanism 21 that has been rotated upward to its maximum extent.

[0023] A viewing member 155 is rotatably provided on the end side of the viewing rotation arm 154, which reflects the scenery in the direction of travel of the traveling vehicle body 40, i.e., the front side of the machine body, and is visible to an operator who sits on the work seat 46 (described later) and on the floor step 122 with his back to the direction of travel of the traveling vehicle body 40. More specifically, the viewing member 155 has a ball-shaped connecting body (not shown) on the rear side of the machine body, and this ball-shaped connecting body is screwed into a connecting hole (not shown) on the viewing rotation arm 154 side, so that it can be rotated and its angle adjusted freely.

[0024] If the viewing member 155 is a mirror 155a, simply attaching it will allow the view in front of the machine to be reflected, thereby suppressing increases in costs due to attachment. Note that in fields where seedling planting work is being done, it is conceivable that visibility will be impaired due to reflections from sunlight and surrounding lighting depending on the time of day and place of work, so it is advisable to make it possible to attach a shade (not shown) or the like to the upper side of the mirror 155a.

[0025] With the above configuration, the visual confirmation rotating arm 154 can be rotated in an arc in the left-right direction of the machine body around a rotation axis in the front-to-rear direction, and the left-to-right position and up-to-down height of the visual confirmation member 155 can be changed, making it possible to easily see the view in front of the machine body reflected in the visual confirmation member 155 according to the worker's working posture and physique. This allows the worker to reliably detect when he or she is approaching the edge of the furrow where seedling planting work will end, or whether there are any obstacles in the worker's path, preventing the worker from planting seedlings in vain in places other than the furrows or damaging the traveling vehicle body 40 by coming into contact with an obstacle.

[0026] In addition, although the operator needs to turn his back to the direction of travel and feed the seedlings into the seedling supply device 43 located at the rear of the machine, there is no need to turn around to see what is happening in front of the machine, which prevents the supply of seedlings from being interrupted and the planting hoppers 20a, 20b from not planting seedlings in the field, which is known as missing plants.

[0027] This eliminates the need for workers to manually plant seedlings in areas where stubble is missing, reducing the labor required of workers.

[0028] When the viewing rotation arm 154 is rotated toward one of the left and right sides of the machine body during storage, the viewing rotation arm 154 is positioned inside the machine body relative to the one of the left and right side ends of the machine body and is configured to fit within the left and right width of the machine body, thereby preventing the viewing device 157 from getting caught and being damaged in the storage location.

[0029] Furthermore, even when not in use, even if the viewing rotation arm 154 is rotated to its maximum extent toward the rotation restriction section 153a on the other side of the left or right side of the body, the viewing rotation arm 154 is positioned at an upper position where it does not interfere with the up-down movement mechanism 21, thereby preventing the viewing rotation arm 154 from being damaged by contact with the up-down movement mechanism 21.

[0030] Furthermore, since the base side of the viewing member 155 is provided between the front and rear of the reinforcing frame 152, vibrations of the aircraft are less likely to be transmitted to the viewing member 155, making it easier to see the scenery reflected in the viewing member 155.

[0031] In addition, by connecting the handle frame 402 and the seedling supply device 43 with a reinforcing frame 152, the strength of the machine body can be improved.

[0032] The visual rotation arm 154 is attached to the rotation support plate 153 using a double nut to prevent it from coming loose or rotating downwards due to its own weight, while allowing the worker to rotate it with a light force, making adjustment easy and possible without the need for tools.

[0033] Bumper support frames 108 each having a U-shape in a front cross section are provided on both the left and right sides of the front side of the vehicle body of the transmission case 39. Bumpers 109 are provided in front of the left and right bumper support frames 108, protruding toward the front of the vehicle body.

[0034] The bumper 109 is made up of a bumper plate 109a, which is a plate bent downward on the front and left and right sides of the aircraft, a front weight 109b that can be attached and detached to the top surface of the bumper plate 109a, and a bumper rod 109c that extends left and right from the bumper plate 109a. The front weight 109b is made from a lump of a relatively heavy and hard material such as iron, and is shaped to protrude further forward than the bumper plate 109a.

[0035] As a result, the front weight 109b, which is a mass having weight and hardness, protrudes furthest forward of the vehicle body, and damage to the bumper plate 109a can be prevented when the vehicle comes into contact with an obstacle.

[0036] Recesses (not shown) are formed on the front and lower sides of the left and right bumper support frames 108, with the underside of the body opening, and a front beam frame 110, whose longitudinal direction is the left-right direction of the body, is inserted and fixed into these recesses.

[0037] By providing the front beam frame 110, a rectangular frame is also assembled on the front side of the vehicle with the left and right bumper support frames 108 and the transmission case 39, improving the strength of the front side of the vehicle. In particular, when the bumper 109 comes into contact with an obstacle, because the left and right bumper support frames 108 are inserted and fixed into the front beam frame 110, damage or impact is less likely to propagate to the rear sides of the left and right bumper support frames 108.

[0038] Furthermore, when assembling the transmission case 39 to the aircraft body, the recesses of the left and right bumper support frames 108 are inserted into the front beam frame 110 and then moved left and right, thereby fixing the front-to-rear position of the transmission case 39 and adjusting its left and right position, thereby preventing delays in assembly work due to misalignment of the installation position of the transmission case 39.

[0039] The rear part of the engine 41 is mounted on one of the left and right sides in front of the transmission case 39, and the front part of the engine 41 is mounted on an engine mount located near the center of the left and right of the front beam frame 110, but the bumper support frame 108 on the side where the engine 41 is located and the engine 41 are arranged with a gap between them in the vertical direction. In other words, the bumper support frame 108 is not a member that supports the engine 41 from below.

[0040] With the above configuration, the impact when the bumper 109 comes into contact with an obstacle can be prevented from being transmitted from the bumper support frame 108 to the engine 41, thereby preventing the engine 41 from being damaged or malfunctioning due to the impact.

[0041] Furthermore, even if the bumper support frame 108 is deformed by an impact, the loading state of the engine 41 is not likely to be affected, and even if the bumper 109 is damaged, work and movement can be performed using the power of the engine 41.

[0042] Step support plates 111, each having a left-right recess for mounting a bumper rod 109c, are attached to both the left and right sides of the bumper plate 109a. The left and right step support plates 111 are supported via reinforcing arms 112 provided on the left and right sides of the front beam frame 110 on the rear side of the aircraft body.

[0043] The top surfaces of the left and right step support plates 111 are flat, and on one side of the traveling body 40, i.e., the left side of the body, there is attached the front portion of the front boarding step 113 on which the operator places their feet when getting on and off from the front of the body. Meanwhile, on the other side of the body, i.e., the right side of the body, there are formed a main spacing lever 801 and a sub-spacing lever 802 for setting the front-to-back spacing between seedlings planted by the planting hoppers 20a, 20b, i.e., the so-called spacing between plants, and a spacing switch cover 114 for supporting a planting speed lever 803 for selecting the first planting speed or the second planting speed when the main speed lever 150 is operated to the planting speed.

[0044] The front boarding step 113 is composed of a lower footrest 113a located at the front of the machine body and vertically lower, an upper footrest 113b located at the rear of the machine body and vertically higher than the lower footrest 113a, and an intermediate inclined portion 113c located between the lower footrest 113a and the upper footrest 113b and twisted and inclined toward the outside of the machine body. A plurality of anti-slip protrusions are formed on the surface of the lower footrest 113a, and the intermediate inclined portion 113c is at an inclination angle that makes it psychologically difficult for an operator to place their feet on it when getting on or off, and has a length in the front and rear that allows the operator to straddle the intermediate inclined portion 113c when moving between the lower footrest 113a and the upper footrest 113b.

[0045] On the other hand, the inter-plant switching cover 114 is composed of a lower base portion 114a located at the front of the machine body and below in the vertical direction, an upper base portion 114b located at the rear of the machine body and above in the vertical direction than the lower base portion 114a, and a lever mounting portion 114c located between the lower base portion 114a and the upper base portion 114b, which is twisted and inclined toward the outside of the machine body and has moving grooves along which the inter-plant main speed change lever 801, the inter-plant auxiliary speed change lever 802, and the main speed change lever 150 each move.

[0046] The front boarding step 113 and the space-spacing switching cover 114 are symmetrical in shape, and the space-spacing switching cover 114 may be located on one side of the body, left or right, and the front boarding step 113 may be located on the other side of the body, left or right.

[0047] Furthermore, side steps 118 are provided on the rear sides of the upper footrest 113b and the upper platform 114b, respectively, so that workers can get on and off the machine from the sides of the machine and use them as footholds during work. The side steps 118 are configured by arranging plates vertically and horizontally within a frame to form multiple spaces, allowing soil adhering to the soles of the workers' shoes to fall downward. In addition, a detachable center step 119 is provided between the left and right side steps 118, so that the worker can use it as footholds.

[0048] The floor step 122 is constructed as described above.

[0049] The front boarding step 113, the space-change cover 114, the left and right side steps 118, and the center step 119 are attached independently of one another, i.e., they are not fastened together with a single attachment member (bolt, etc.). This eliminates the need to remove other step components when removing each step component during partial maintenance work, improving the efficiency of maintenance work.

[0050] A boarding / disembarking assistance mechanism 170 is attached to the front lower part of the front boarding step 113, on which an operator places their feet when getting on and off the front boarding step 113. The boarding / disembarking assistance mechanism 170 is composed of an outer support arm 171 located on the outside of the machine body, which is L-shaped in a side view, and which has a first protrusion 171a that protrudes forward and below the machine body from a bent portion, an inner support arm 172 located on the inside of the machine body, which is L-shaped in a front view, and which has a second protrusion 172a that protrudes outward and below the machine body from a bent portion, and a boarding / disembarking assistance step 173 that is provided across the first protrusion 171a and the second protrusion 172a.

[0051] The outer support arm 171 is attached to the traveling vehicle body 40 together with the step support plate 111 by fastening them together with fastening bolts 174. The inner support arm 172 is attached to the traveling vehicle body 40 together with the bumper plate 109a by fastening them together with fastening bolts 174.

[0052] This results in a configuration in which multiple components are fastened together with co-tightening bolts 174..., which improves the strength of the traveling body 40 near the front of the machine body and reduces the decrease in durability due to the load associated with workers getting on and off.

[0053] Furthermore, by providing the boarding / disembarking assistance step 173, even if the vehicle height of the traveling body 40 is increased to match the height of the ridges, the worker can place his / her feet on the boarding / disembarking assistance step 173, and then step by step place his / her feet on the lower footrest portion 113a of the front boarding step 113 to get on, and then dismount by performing the reverse action, so there is no need to raise his / her feet high or jump off to any degree when getting on or off, and the burden on the worker's body is reduced.

[0054] Furthermore, by providing the boarding / alighting assistance step 173 across the first protrusion 171a and the second protrusion 172a, the outer support arm 171 and the inner support arm 172 are not positioned within the left-right width of the boarding / alighting assistance step 173, thereby preventing the worker's feet from coming into contact with the outer support arm 171 and the inner support arm 172.

[0055] On the other hand, when the vehicle height of the traveling vehicle body 40 is lowered or during planting work, not only is the boarding / disembarking assistance mechanism 170 unnecessary, but depending on the vehicle height, it may come into contact with the ridge surface or the slope of the ridge, causing the ridge to collapse and reducing the accuracy of planting the seedlings.

[0056] 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 attached rotatably using the co-fastening bolts 174 as pivot points, so that the boarding / disembarking assistance mechanism 170 can be configured to rotate up and down.

[0057] With the above configuration, when not needed, the boarding / dismounting assistance mechanism 170 can be rotated upward away from the furrow surface, thereby preventing the boarding / dismounting assistance mechanism 170 from damaging the furrow and maintaining the accuracy of planting seedlings.

[0058] 1 to 8, the lower part of the spacing switching cover 114 is provided with a ridge edge sensor stay 182a that supports a ridge edge sensor 182 that rotates downward under its own weight and comes into contact with the ridge surface, and when the traveling body 40 reaches the end of the ridge and no longer touches the ground, rotates further downward and activates an alarm device 181 that notifies the operator that the field edge has been reached. The alarm device 181 is a buzzer or lamp attached to various parts of the traveling body 40, or a communication device that notifies the operator's information terminal (tablet, smartphone, etc.).

[0059] The ridge edge sensor 182 is configured by providing a rotatable sensor arm 183, a ridge contact roller 184 rotatably attached to the lower part of the sensor arm 183, a ground biasing spring 185 that biases the sensor arm 183 downward, and a ridge edge detection switch 186 that turns on (or off) when the sensor arm 183 reaches a predetermined angle or more, at the base of the sensor arm 183. The upper end of the ground biasing spring 185 is attached to a detection adjustment plate 187 whose angle can be adjusted along a long hole, and the angle at which it operates can be changed according to the ridge height.

[0060] When the travelling vehicle starts to plant seedlings, the height of the travelling vehicle body 40 is adjusted to bring this ridge edge sensor 182 into contact with the ridge surface. By bringing the rotatable ridge contact ground roller 184 into contact with the ground, the ridge surface is less likely to collapse and minute irregularities can be levelled out, improving the accuracy of planting seedlings.

[0061] Then, as the traveling body 40 continues to move forward and reaches the end of the ridge, and the ridge contact ground roller 184 no longer contacts the ridge surface, the sensor arm 183 rotates downward due to the biasing force of the ground contact spring 185 and the weight of the sensor arm 183 and the ridge contact ground roller 184, and the ridge end detection switch 186 is no longer pressed. When the ridge end detection switch 186 is no longer pressed, electricity is supplied to the alarm device 181, which activates and notifies the operator that the front end of the traveling body 40 has reached the ridge end.

[0062] When the ridge end sensor 182 detects the ridge end, there is still space for several plants remaining on the ridge, so the operator does not immediately stop the machine, but instead prepares to stop it while loading the number of seedlings into the seedling supply device 43 that can be planted in the remaining planting space.

[0063] This allows the operator to know when they are approaching the edge of the furrow without having to look back, allowing them to stop the machine just as they have finished planting the seedlings on the furrow, preventing fuel consumption from unnecessary travel and longer distances to travel to the next work row.

[0064] In addition, when the edge of the ridge is approached, the number of seedlings to be fed into the seedling supply device 43 can be adjusted, so even if the operation to stop the planting work travel is delayed and the planting hoppers 20a, 20b perform planting operation, seedlings are prevented from being released to areas other than the ridge.

[0065] In addition, the sensor arm 183 may be a pair of left and right sensor arms 183a, 183a, the furrow contact ground roller 184 may be configured such that left and right furrow contact ground rollers 184a, 184a are rotatably mounted, and left and right furrow end detection switches 186, 186 are provided, respectively.

[0066] As a result, when one of the left and right sensor arms 183, 183 rotates downward and one of the corresponding row edge detection switches 186, 186 is not pressed, the alarm device 181 is activated, making it easier to detect the row edge even if it has been distorted by wind and rain and its shape has been disturbed, allowing the worker to stop the planting work at the right time.

[0067] In addition, front wheels 45 are provided on both the left and right sides of the front of the traveling body 40, and further forward than the rear wheels 44, via horizontal frames 16 that are provided on the lower side of the front beam frame 110 and protrude in the left-right direction of the body, and are supported so as to be able to roll freely.

[0068] The ends of the wheel drive shafts extending outward on both the left and right sides from the transmission case 39 fit into the rotation axis position at the front of the traveling transmission case 38, and the traveling power passes through the traveling system speed change transmission part in the transmission case 39 and is transmitted to the transmission mechanism in the traveling transmission case 38. The traveling power is then transmitted to the rear wheel axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, so that the rear wheels 44 are driven to rotate.

[0069] The drive of each of the left and right rear wheels 44 can be cut off by left and right side clutches (not shown) provided inside the transmission case 39. Therefore, when turning the vehicle, the left or right rear wheel 44 on the inside of the turn is put into a non-driven state by the side clutch, allowing for smooth turning.

[0070] Additionally, a driving means that rotates up and down is connected to the traveling transmission case 38, and moves the rear wheels 44 up and down around the front side of the traveling transmission case 38 as a rotation fulcrum. Specifically, an arm extending upward is integrally attached to the mounting portion of the traveling transmission case 38 to the transmission case 39, and the arm 13 is connected to both left and right sides of a connecting body attached to the tip of the piston rod of an elevation hydraulic cylinder fixed to the transmission case 39. One of the left and right sides (the right side) is connected by a connecting rod, and the other side (the left side) is connected by a left and right horizontal control hydraulic cylinder that can expand and contract in response to the inclination of the vehicle body.

[0071] When the lifting hydraulic cylinder is actuated and its piston rod projects rearward, the left and right arms rotate rearward, causing the travel transmission case 38 to rotate downward and the machine to rise. Conversely, when the lifting hydraulic cylinder's piston rod moves forward and retracts into the cylinder, the left and right arms rotate forward, causing the travel transmission case 38 to rotate upward and the machine to descend.

[0072] This lifting hydraulic cylinder is operated by a ridge surface sensor that is in contact with the ridge surface and operates in response to changes in the vertical distance between the machine body and the ridge surface. The ridge surface sensor operates to detect the height of the ridge top surface based on the machine body position, and the lifting hydraulic cylinder operates to raise the machine body to a set height corresponding to the ridge top surface height based on the detection operation of the ridge surface sensor.

[0073] Furthermore, when the left-right horizontal control hydraulic cylinder extends or retracts, the left arm connected to the left-right horizontal control hydraulic cylinder rotates, moving only the left rear wheel 44 up and down and tilting the machine body left or right. This left-right horizontal control hydraulic cylinder operates based on the detection results of a sensor that detects the left-right inclination of the machine body with respect to left-right horizontality, thereby keeping the machine body left and right level.

[0074] The horizontal frame 16 is mounted to the front beam frame 110 so as to be able to rotate in a rolling manner around a longitudinal axis, and vertically long vertical frames 17 are mounted on both the left and right sides of the horizontal frame 16. The left and right front wheels 45 are rotatably attached to front wheel axles 18 fixed to the sides of the lower end of the vertical frame 17. Therefore, the left and right front wheels 45 are able to roll around a longitudinal axis at the center of the left and right of the vehicle. Furthermore, the vertical frames 17 are mounted so as to be able to be adjusted up and down using the left and right sides of the horizontal frame 16 as reference points, so that the height of the front wheels 45 can be adjusted.

[0075] The steering handle 47 is provided at the rear of the vehicle, and is located rearward of the rear wheel axle 12 of the rear wheels 44. Specifically, it is attached to the rear end of the vehicle frame, the front end of which is fixed to the transmission case 39.

[0076] The aircraft frame extends rearward from the center of the aircraft body in the lateral direction, and also extends obliquely rearward and upward from the center of the front-rear direction.

[0077] The control handle 47 extends rearward on both sides from the rear end of the vehicle frame, with each rear end serving as a grip portion of the control handle 47.

[0078] In the drawing, the grip portion is configured as being separated into left and right halves, but 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.

[0079] The planting device 42 comprises a plurality of beak-shaped planting tools with downward-pointing tips, an up-and-down movement mechanism 21 that moves the planting tools up and down between positions where the lower ends of the planting tools are above and below the field surface, and an opening / closing mechanism that opens and closes the planting tools between a closed state in which the lower ends of the beak-shaped planting tools are closed to receive seedlings from above and store the seedlings inside, and an open state in which the lower ends of the planting tools are open to the left and right and the seedlings stored inside can be released downward.

[0080] 1 to 5, the planting device 42 of this embodiment has a two-row planting configuration, with a first planting hopper 20a and a second planting hopper 20b arranged side by side. These first planting hopper 20a and second planting hopper 20b are each attached to a vertical movement mechanism 21 provided on both the left and right sides of a transmission case 26 to which power is transmitted from a transmission case 39.

[0081] Each seedling container 22 of the seedling supplying device 43 has a cylindrical body that opens at the top and bottom, and a bottom cover that opens and closes the opening at the bottom of the cylindrical body, and is connected to each other in a loop shape.

[0082] Then, the moving mechanism moves the connected seedling containers 22 counterclockwise in a loop-like trajectory that is elongated from side to side when viewed from above the machine body, while each connected seedling container 22 passes near the top of the left and right planting hoppers 20a, 20b.

[0083] Then, the seedling dropping mechanism opens the bottom cover of the seedling container 22 at a position above the planting hopper 20a, 20b corresponding to that seedling container 22.

[0084] The worker sits in the work seat 46 and supplies seedlings to each seedling container 22 of the seedling supply device 43. However, if the worker runs out of seedlings to replenish or if some other problem occurs, such as the seedlings repeatedly being planted in an abnormal position or the seedlings not being planted, the traveling vehicle body 40 must stop traveling and the planting hoppers 20a, 20b must be stopped. Also, if the traveling speed or the rate at which the planting hoppers 20a, 20b are raised and lowered is faster than the worker's pace, the output of the engine 41 must be reduced to a speed that makes it easier to work.

[0085] In order to enable the above operations to be performed while seated in the work seat 46, a second engine switch 408 is provided at the front of the seedling supply device 43, at one of the left and right ends, i.e., on the right hand side of the operator seated in the work seat 46, for switching whether the engine 41 can be started or not and for stopping the engine 41, and a second throttle lever 409 is provided at a position closer to the inside of the machine (the other left or right side of the machine) than the second engine switch 408, so that it can be rotated left and right in the machine direction to increase or decrease the output of the engine 41.

[0086] The second engine switch 408 is operated in the same manner as the first engine switch 407, but the engine 41 will not start unless both the first engine switch 407 and the second engine switch 408 are operated to the ON position.

[0087] This allows the operator to stop the engine using the first engine switch 407 when operating the vehicle by holding the control handle 47 at the rear of the vehicle, such as when moving, and the second engine switch 408 can be turned off to stop the engine 41 when the operator is on board the traveling body 40, such as when planting seedlings, so there is no need to get off the traveling body 40 while on board and go to turn off the first engine switch 407, and operations that may cause problems to planting or the vehicle can be interrupted.

[0088] Furthermore, since the second throttle lever 409 can be operated from the traveling body 40, there is no need to get on or off the traveling body 40 when increasing or decreasing the output of the engine 41, which improves work efficiency and work accuracy.

[0089] The left and right planting hoppers 20a, 20b are disposed rearward of the position of the rear wheel axle 12.

[0090] The seedling supply device 43 is configured so that the seedling container 22 moves around in one revolution in accordance with the left and right planting hoppers 20a, 20b to supply the seedlings.

[0091] Separate seedling containers 22 are provided for the left and right planting hoppers 20a, 20b to accommodate the seedlings to be dropped and supplied, and the bottom lid opens only when the seedling container 22 comes above the corresponding left and right planting hoppers 20a, 20b, and does not open above the uncorresponding left and right planting hoppers 20a, 20b.

[0092] Therefore, when an operator seated on the work seat 46 supplies seedlings to each seedling container 22 of the seedling supply device 43, each seedling container 22 moves in a circular motion in synchronization with the up and down movement of the left and right planting hoppers 20a, 20b, and when the left and right planting hoppers 20a, 20b are positioned opposite the top of the planting trajectory, their bottom covers open and the seedlings automatically drop into the left and right planting hoppers 20a, 20b (at the top of the planting trajectory, which is moved up and down by the up and down movement mechanism 21, the pair of beak-shaped planting tools at the bottom of the left and right planting hoppers 20a, 20b are closed).

[0093] The left and right planting hoppers 20a, 20b are then moved downward by the vertical movement mechanism 21, opening at the bottom of the planting trajectory where a pair of beak-shaped planting tools enter the field, planting the seedlings they hold into the field, and then leaving the field open as they move upward.

[0094] The transplanter 10 of this embodiment is provided with soil covering and compacting wheels 37, which are used to compact the soil covering in accordance with the seedlings planted by the left and right planting hoppers 20a, 20b, located near both the left and right sides of the rear of the seedling planting areas of the left and right planting hoppers 20a, 20b.

[0095] The left and right soil-covering suppression wheels 37 are each composed of suppression arms 370, 370 that can be rotated up and down independently, each formed by bending a single rod into a J shape when viewed from above, and a pair of suppression rotors 371, 371 that can be rotated freely on the left and right sides, respectively, at the rear of the left and right suppression arms 370, 370.

[0096] The suppression arm 370 has one end located inside the machine body attached to the rear side of the traveling vehicle body 40 so as to be able to rotate up and down, and the rear part of the straight part that protrudes rearward is bent upward, then bent outward from the machine body and further bent downward so as to be bent forward from the machine body at the same vertical position as the straight part inside the machine body. Of the left and right suppression rotors 371, 371, the suppression rotor 371 on the outside of the machine body is provided on the straight part on the outside that bends forward from the machine body, and the suppression rotor 371 inside the machine body is attached to the straight part inside the machine body.

[0097] With the above configuration, an avoidance portion 372 that protrudes upward from the machine body is formed at the rear of the suppression arm 370, and the left and right suppression rotors 371, 371 are arranged with a lateral gap between them. As a result, seedlings planted by the planting hoppers 20a, 20b pass through the lateral gap between the left and right suppression rotors 371, 371, the surrounding soil is leveled, and the seedlings pass under the avoidance portion 372, preventing them from being pushed down by the soil-covering suppression wheels 37, 37 and disrupting the planting posture.

[0098] The left and right suppression arms 370, 370 are each mounted so that their left and right positions on the machine body can be adjusted, allowing the suppression position to be changed according to the row spacing setting of the planting hoppers 20a, 20b. Also, if the left and right suppression rotors 371, 371 are each configured so that their left and right positions can be adjusted, the soil around the seedlings after planting can be reliably compacted, preventing the seedlings from falling over or from growing poorly due to low temperatures.

[0099] The fields where the traveling vehicle 40 works are not flat, especially in mountainous regions, and some are sloped. The transplanter is equipped with heavy equipment, such as the transmission case 26, seedling supply device 43, and planting hoppers 20a and 20b, at the rear of the vehicle, making the front of the vehicle prone to lifting up on uphill slopes. To prevent this, the engine 41 and transmission case 39 are located at the front of the traveling vehicle 40, along with the operator seat 46, to balance the weight between the front and rear. However, depending on the slope of the work area, the front of the vehicle may still lift up, resulting in a front-up tilted posture. This can result in seedlings being planted in a rearward tilted position on the furrow surface, which not only creates an unsightly appearance but also may hinder growth. In particular, as the fuel in the fuel tank is consumed and the replacement seedlings loaded in the spare seedling frame 50 decrease in number as work progresses, the weight of the front of the vehicle fluctuates, making it prone to a front-up tilted posture.

[0100] Furthermore, when seedlings are dumped from the seedling supply device 43 into the planting hoppers 20a, 20b, they may not fit into the upper openings of the planting hoppers 20a, 20b and may fall into the field, resulting in missing stalks at the planting location. Even if the seedlings do get into the planting hoppers 20a, 20b, they are dumped toward the rear of the planting hoppers 20a, 20b, which, combined with the fore-and-aft tilt of the traveling vehicle body 40, may further disrupt the planting posture.

[0101] Furthermore, if the tilt angle becomes too large, the traveling vehicle body 40 may tip over, scattering the loaded seedlings across the field, requiring the effort of picking them up, and there is also a risk that parts of the vehicle may be damaged when they come into contact with the field floor when the vehicle tips over.

[0102] 17, left and right excessive tilt sensors 194, 194 are provided on the mounting base sides of the left and right suppression arms 370, 370. When the traveling vehicle body 40 rotates by a predetermined angle or more, the left and right excessive tilt sensors 194, 194 are respectively provided on the mounting base sides of the left and right suppression arms 370, 370. When either the left or right side is pressed and enters a detection state, the left and right excessive tilt sensors 194, 194 determine that the traveling vehicle body 40 is in a position where it is tilted forward upward by a predetermined angle or more (for example, 5 to 10 degrees), and stop the engine 41 or cut off the transmission of driving force to the left and right traveling transmission cases 38 and transmission case 26 within the transmission case 39.

[0103] The left and right excessive tilt sensors 194, 194 are actuated by pressure pins 370b, 370b in the left-right direction of the machine body that are provided on actuating pieces 370a, 370a that extend forward from the mounting bases of the left and right suppression arms 370, 370, respectively.

[0104] The pressing pin 370b extends on both the left and right sides of the operating piece 370a, and is configured so that the pressing pin 370b activates the excessive tilt sensor 194 even when the row spacing is changed and the left and right suppression arms 370, 370 are moved inward in the left and right direction of the machine body. In other words, when the row spacing is narrowed and the left and right suppression arms 370, 370 are moved inward in the left and right direction of the machine body, the outward extending portion of the pressing pin 370b activates the excessive tilt sensor 194, and when the row spacing is widened and the left and right suppression arms 370, 370 are moved outward in the left and right direction of the machine body, the inward extending portion of the pressing pin 370b activates the excessive tilt sensor 194. Therefore, when the row spacing is changed, there is no need to adjust the position of the pressing pin 370b or the excessive tilt sensor 194, improving operability.

[0105] In addition, the transmission of driving force to the left and right traveling transmission cases 38 and transmission case 26 is cut off by activating a traveling transmission actuator that switches on and off the traveling clutch (not shown) built into the transmission case 39, and a planting transmission actuator that switches on and off the planting clutch (not shown), respectively, or by activating a main transmission actuator that switches on and off the main clutch (not shown) on the upstream side of the transmission than the traveling clutch and planting clutch.

[0106] As a result, when the traveling vehicle body 40 assumes an inclined posture unsuitable for planting seedlings, the traveling for planting work is automatically stopped, preventing the planting posture of the seedlings from being disturbed and preventing each part of the machine body from being damaged due to tipping over.

[0107] The above-mentioned tilting of the traveling vehicle body 40 upward at the front can be problematic if it occurs during planting operations. However, during non-planting operations, such as moving to a field or loading and unloading onto a light truck or other transport, the operator controls the vehicle by holding the steering handle 47 at the rear of the vehicle, so this does not pose a problem and cannot occur at all. However, when going over a step or moving a step to transfer the load to the loading platform, the traveling vehicle body 40 must be tilted upward at the front to an angle greater than the tilt angle detected by the left and right excessive tilt sensors 194, 194. If the engine 41 or the traveling transmission stops at this time, the operator must manually move the traveling vehicle body 40, which requires extra effort and the need to restart the engine 41, which further increases the labor and fuel consumption.

[0108] To prevent this, a seat detection sensor 195 that detects whether an operator is seated is provided on the work seat 46. If the seat detection sensor 195 detects that an operator is seated and the left and right excessive tilt sensors 194, 194 detect excessive tilt, the engine 41 or the travel and planting transmission will stop, but if the operator is not detected to be seated, the circuit is configured so that the engine 41 or the travel and planting transmission will not stop even if the left and right excessive tilt sensors 194, 194 detect excessive tilt.

[0109] As a result, when planting work is not being performed, the traveling vehicle body 40 can continue to move by driving force, improving work efficiency and reducing the labor required by the worker.

[0110] In addition, to prevent the seating detection sensor 195 from mistakenly detecting that the worker is seated due to the weight of luggage (e.g., empty boxes that contained seedlings, information terminals, water bottles, and plastic bottles) that the worker has loaded onto the machine body, the load that is deemed to be detected is set to a predetermined weight (e.g., 30 to 40 kg) or more, thereby ensuring that the sensor can reliably detect that the worker is seated.

[0111] To further prevent false detection, it is advisable to set the conditions that the ridge edge sensor 182 has not detected the arrival at the ridge edge, and that either or both of the left and right excessive tilt sensors 194, 194 are in a detection state. When not passing over a ridge, the sensor arm 183 of the ridge edge sensor 182 rotates downward, so that it is always detecting the ridge edge, and its front-up tilt position makes it difficult for it to come into contact with uneven ground, preventing the engine 41, travel, and planting transmission from stopping due to false detection.

[0112] Here, the configuration of the work seat 46 and the seating detection sensor 195 that detects whether the worker is seated will be described in detail with reference to FIG.

[0113] The transplanter of this invention is provided with a work seat 46 on which an operator can sit to perform seedling supplying work by riding and supplying seedlings to the seedling supply device 43. Specifically, the work seat 46 is located in the center of the left and right of the machine body, facing backward, at the front of the seedling supply device 43. The operator sitting on the work seat 46 faces backward toward the front part of the seedling supply device 43, and performs seedling supplying work by corresponding to the front part of the seedling supply device 43, particularly the front straight portion 28 of the circular movement path of the seedling container 22.

[0114] The work seat 46 is mounted on left and right seat mounting frames 501, 501 which are welded to the upper part of a seat frame 500 made of an iron pipe material whose base is fixed to the traveling vehicle body 40.

[0115] The seat mounting frame 501 is an inverted U-shaped frame provided in the front-rear direction, and is provided with a seat position adjustment plate 503 provided with an arc-shaped elongated hole 502 for adjusting the seat position at the rear.

[0116] The seat position adjustment slot 502 is arc-shaped and becomes lower towards the rear, and has three position adjustment holding recesses 504 at the bottom.

[0117] Furthermore, the seat mounting frame 501 is provided with a seating detection sensor 195 facing a through hole 505 provided in the center.

[0118] The work seat 46 has a seat support plate 506 at the bottom.

[0119] At the rear of the seat support plate 506, a seat support arm 507 is extended downward, and a pivot support pin 508 for rotation in the left-right direction of the aircraft body is provided at the lower part of the seat support arm 507.

[0120] A front support member 509 made of cushion rubber is provided at the front of the seat support plate 506 to support the front of the work seat 46 .

[0121] A pressing member 510 that passes through the through-hole 505 of the seat mounting frame 501 and presses the seating detection sensor 195 is provided slightly behind the front support member 509 of the seat support plate 506 .

[0122] A pivotal support pin 508 provided on a seat support arm 507 at the rear of the seat support plate 506 is inserted into a seat position adjustment slot 502 in a seat position adjustment plate 503 provided on the seat mounting frame 501, and is adjusted forward and backward along the arc-shaped seat position adjustment slot 502 to engage with and be held in one of three position adjustment holding recesses 504.

[0123] Therefore, when the pivoting support pin 508 is engaged with the frontmost position adjustment holding recess 504, the work seat 46 is adjusted to its forwardmost position, away from the front straight portion 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a tall worker to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43.

[0124] Furthermore, when the pivot support pin 508 is engaged with the rearmost position adjustment and holding recess 504, the work seat 46 is adjusted to its rearmost position, close to the front straight portion 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a short worker to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43. Furthermore, since the pivot support pin 508 is engaged and held in the rearmost position adjustment and holding recess 504, which has an arc-shaped seat position adjustment slot 502 that becomes lower toward the rear, the work seat 46 is lowered, making it very easy for a short worker to supply seedlings to the seedling container 22.

[0125] Furthermore, when the pivoting support pin 508 is engaged with the intermediate position adjustment holding recess 504, the work seat 46 is adjusted to a position intermediate in the front-to-rear direction, which is suitable for a worker of standard height to sit on the work seat 46 and supply seedlings to the seedling storage body 22 of the seedling supply device 43.

[0126] Furthermore, since the seat position adjustment slot 502 of the seat mounting frame 501 is arc-shaped, even when the worker remains seated on the work seat 46, the rear of the work seat 46 can be slightly lifted to remove the rotation support pin 508 from the position adjustment holding recess 504, and the work seat 46 can be easily slid back and forth along the arc at the top of the seat position adjustment slot 502, thereby facilitating the adjustment of the forward and backward movement of the work seat 46.

[0127] Furthermore, regardless of which position adjustment holding recess 504 the rotation support pin 508 is engaged with, the backrest side of the front of the work seat 46 can be rotated toward the rear of the machine body around the rotation support pin 508 as a rotation center, and the machine can be changed to a stowed position at a low stowed position. Therefore, when loading the machine onto a truck or storing it in a barn, the height of the machine can be lowered, improving loading and storability. Also, when opening the fuel tank lid 511 located below and near the work seat 46 to supply fuel to the fuel tank, the fuel supply operation can be easily performed by changing the machine's position to the stowed position.

[0128] When the worker sits on the work seat 46, the front support member 509 made of cushion rubber is crushed by the worker's weight, and the pressing member 510 passes through the through hole 505 of the seat mounting frame 501 and presses the seating detection sensor 195 to turn it ON, thereby detecting that the worker is sitting.

[0129] In particular, since the rotation support pin 508, which serves as the rotation fulcrum for the work seat 46, is located at the rear end of the work seat 46, even if the worker sits near the rear end of the work seat 46 to supply seedlings to the seedling container 22 of the seedling supply device 43, the front side of the work seat 46 is less likely to rise up, and the seating detection sensor 195 can reliably detect that the worker is seated.

[0130] Here, we will explain the automatic ridge end stopping function that stops the engine 41 and the transplanter 10 when the transplanter 10 reaches the end of the ridge while the transplanter 10 is traveling along the ridge and the operator is sitting in the work seat 46 with his back to the direction of travel and transplanting seedlings.

[0131] When the transplanter 10 is traveling along the ridges and the operator is seated in the work seat 46 with his back to the direction of travel and performing seedling transplanting work in normal conditions, the first engine switch 407, second engine switch 408, seat detection sensor 195, ridge edge detection switch 186 and left and right excessive tilt sensors 194, 194 in the electrical circuit diagram of the engine 41 in Figure 12 are all turned ON, and the engine 41 is running.

[0132] Then, as the transplanter 10 continues to move forward while performing transplanting work and reaches the end of the ridge, and the ridge contact ground roller 184 of the ridge end sensor 182 no longer contacts the ridge surface, the sensor arm 183 rotates downward due to the force of the ground contact spring 185 and the weight of the sensor arm 183 and the ridge contact ground roller 184, and the ridge end detection switch 186 is no longer pressed and turns OFF, the engine 41 stops, and the transplanter 10 stops.

[0133] In particular, since the rotation support pin 508, which serves as the rotation fulcrum for the work seat 46, is located at the rear end of the work seat 46, even if the worker sits near the rear end of the work seat 46 to supply seedlings to the seedling container 22 of the seedling supply device 43, the front side of the work seat 46 is less likely to rise up, and the seat detection sensor 195 can reliably detect that the worker is seated.This prevents a situation in which the seat detection sensor 195 turns off, stopping the engine 41 and the transplanter 10, even though the worker is seated on the work seat 46 and performing seedling transplanting work in normal conditions.

[0134] Spare seedling frames 50 capable of accommodating seedlings to be supplied to the seedling supply device 43 are provided on both the left and right sides of the work seat 46 above the rear wheel axles 12 of the rear wheels 44 when viewed from the side of the machine body.

[0135] When transplanting seedlings into a field, water may be supplied to the vicinity of the planted seedlings, taking into consideration the soil quality of the field, the surrounding water environment, the weather conditions before the work, and other conditions, so-called irrigation work.

[0136] In the transplanter of this invention, a water tank holder 601 for carrying a water tank 600 is provided on each of the left and right travel transmission cases 38, 38.

[0137] The irrigation water stored in the water tank 600 is pumped up by an irrigation pump installed at the bottom of the traveling body 40, near the center of the front and rear of the body, and is discharged to the position where the planting hoppers 20a, 20b plant seedlings. The irrigation pumps are arranged according to the number of planting hoppers 20a, 20b, and are arranged on the left and right sides with a gap between them, with the left and right center of the traveling body 40 as the base.

[0138] Next, the scraper mechanism 700 that removes soil adhering to the left and right planting hoppers 20a, 20b will be described.

[0139] The scraper mechanism 700 is a mechanism having a scraper 701 attached to the soil cover pressing wheel 37, which removes soil adhering to the outer peripheral surface of the descending and ascending planting hopper 20a (20b).

[0140] The scraper 701 is attached to the soil cover pressing wheel 37 so as to be rotatable in the vertical direction, so that there is no need to adjust the scraper 701 in conjunction with the row spacing adjustment operation.

[0141] As shown in Figures 18 and 19, the scraper 701 has two scraper plates 702 arranged side by side in the left-right direction of the vehicle body, scraper plate arms 703 attached to each of the two scraper plates 702, a scraper plate arm mounting base 704 to which the two scraper plate arms 703 are attached so that they can rotate in the left-right direction of the vehicle body, and a pull-biasing spring that urges the two scraper plate arms 703 so that the two scraper plates 702 are pulled together.

[0142] That is, scraper plate arm mounting base 704 is attached to the rear of the front end of suppression arm 370. The front end of scraper plate arm 703, for mounting scraper plate 702 formed using a rubber plate or the like, is pivotally supported on scraper plate arm mounting base 704 by pivot shaft 705.

[0143] The scraper plate arm mounting base 704 is attached to the pressure-reducing arm 370 so as to be rotatable in the vertical direction, and is biased by a lift bias spring so that the rear end of the scraper plate 702 is lifted.

[0144] That is, although the height of the scraper plate arm 703 is not very large, the position of the scraper plate arm 703 is an upward tilted position in which the rear side of the attachment part of the scraper plate 702 rises rearward at an acute angle. Therefore, the scraper plate 702 is tilted downward while being rotated in the left-right direction of the vehicle body, so that the planting hopper 20a (20b) lowered in an arc smoothly enters the area between the two scraper plates 702 in the direction normal to the plate surface.

[0145] The two scraper plates 702 come into contact with the outer periphery of the planting hopper 20a (20b) over a long vertical range, reliably removing soil that has adhered to the outer periphery of the planting hopper 20a (20b), ensuring uninterrupted planting of seedlings by the planting hopper 20a (20b), and ensuring planting accuracy. In addition, removing soil that has adhered to the outer periphery of the planting hopper 20a (20b) prevents the planting hopper 20a (20b) from being unable to penetrate sufficiently into the soil, resulting in shallow planting depth.

[0146] When the planting hopper 20a (20b) is raised and moves away from the scraper plate 702, the scraper plate arm mounting base 704 is urged upward by the lifting spring, realizing a rearward tilted posture of the scraper plate arm 703. Therefore, the entire scraper 701 rotates upward, preventing the planted seedlings from being knocked over by contact with the scraper 701. Furthermore, there is sufficient time for the raised planting hopper 20a (20b) to slide against the scraper plate 702, so soil adhering to the outer surface of the planting hopper 20a (20b) is more reliably removed.

[0147] The left scraper plate arm 703 is attached to the left edge of the left scraper plate 702 , and the right scraper plate arm 703 is attached to the right edge of the right scraper plate 702 .

[0148] The left and right scraper plates 702, 702 are each formed with a slit 706 extending outward from the edge at the front-rear central portion.

[0149] Semicircular notches 707, 707 are formed in front and behind the slits 706 of the left and right scraper plates 702, 702, allowing the scraper plate 702 to flex flexibly along the outer circumferential surface of the planting hopper 20a (20b) as it descends and ascends. The notches 707, 707 extend from the opposing sides of the left and right scraper plates 702 to the opposite sides, so the end portions of the scraper plate 702 deform to fit along the outer circumferential surface of the planting hopper 20a (20b), ensuring reliable soil removal.

[0150] When the planting hopper 20a (20b) descends along the planting trajectory, it penetrates from above into the semicircular cutouts 707 at the front of the left and right scraper plates 702, 702, and when it rises, it exits from the semicircular cutouts 707 at the rear of the left and right scraper plates 702, 702.

[0151] The left and right scraper plate arms 703, 703 are inclined so that the rear end portions are positioned more inward than the front end portions, and are positioned more inward as they approach the rear.

[0152] Therefore, at the rear of the left and right scraper plate arms 703, 703, the length by which the left and right scraper plates 702, 702 protrude from the inner edges of the left and right scraper plate arms 703, 703 is shortened, and when the planting hopper 20a (20b) comes out of the semicircular cutout portion 707 at the rear of the left and right scraper plates 702, 702, the range over which the left and right scraper plates 702, 702 turn over is reduced and the elasticity is strong, so that soil adhering to the outer surface of the planting hopper 20a (20b) is reliably removed.

[0153] In addition, the left and right scraper plate arms 703, 703 have an inclined shape that positions the rear end more inward than the front end, so that when the planting hopper 20a (20b) moves rearward while rising from the planting position, the inclined portions act as a guide, allowing the left and right scraper plate arms 703, 703 to open smoothly without getting caught.

[0154] In addition, the stopper piece 375 that regulates the lowering position of the suppression arm 370 of the soil suppression wheel 37 to which the scraper 701 is attached is located outside the scraper 701, but the left and right scraper plate arms 703, 703 have an inclined shape that positions more inward as they move rearward so that the rear end is positioned more inward than the front end, thereby preventing interference with the stopper piece 375.

[0155] The stopper piece 375 has a recess 376 formed on the upper surface of the tip that receives the suppression arm 370, along the outer circumferential surface of the suppression arm 370, to reduce rattle when receiving the suppression arm 370. In addition, the lower surface of the tip of the stopper piece 375 has an inclined chamfer 376, so that even if the tip of the stopper piece 375 interferes with the scraper plate arm 703, the chamfer 376 allows the scraper plate arm 703 to escape.

[0156] As shown in Figure 20, a slit 710 is provided in the cutout portion 707 of the scraper plate 702, and when the outer peripheral surface of the planting hopper 20a (20b) comes into contact with the cutout portion 707, the scraper plate 702 deforms, reliably removing the soil adhering to the outer peripheral surface of the planting hopper 20a (20b).

[0157] The scraper plate 702 is made by welding (or gluing) rubber to the cloth, and is installed with the cloth side facing downwards and the rubber side facing upwards when assembled into the machine. Therefore, when the planting hopper 20a (20b) comes out of the semicircular cutouts 707 at the rear of the left and right scraper plates 702, 702, the left and right scraper plates 702, 702 are less likely to curl up, and even if they do curl up, they return to their original position, ensuring the removal of soil adhering to the outer surface all the way to the tip of the planting hopper 20a (20b).

[0158] Furthermore, as shown in Figure 21, if an extension portion 703a extending inward is provided at the rear end of the left and right scraper plate arms 703, 703 to support the vicinity of the cutout portion 707 at the rear of the scraper plate 702, the left and right scraper plates 702, 702 are prevented from curling up when the planting hopper 20a (20b) comes out of the cutout portion 707 at the rear of the left and right scraper plates 702, 702, and soil adhering to the outer surface of the planting hopper 20a (20b) can be reliably removed up to the tip.

[0159] The mounting structure of the soil-covering wheels 37 on the traveling vehicle body 40 will be described with reference to FIGS. 22 and 23. FIG.

[0160] A suppression shaft 801 is inserted into a soil suppression wheel mounting frame 800 provided at the rear of the running body 40, and support pipes 376, 376 provided at the base of the suppression arms 370, 370 of the left and right soil suppression wheels 37, 37 are externally rotatably attached to the suppression shaft 801.

[0161] A base arm 802, the base of which is welded and fixed to the soil cover suppression wheel mounting frame 800, has a mounting hole 803 formed therein.

[0162] The mounting arm 804 fixed to the suppression arm 370 of one of the soil cover suppression wheels 37 has a left mounting hole 805 and a right mounting hole 806 with a width L of the row-to-row adjustment length in the left-right direction.

[0163] 22 and 23, the mounting hole 803 of the base arm 802 is aligned with the right mounting hole 806 of the mounting arm 804, and both arms 802, 804 are fixed with bolts. At this time, there is a wide gap between the end of the support pipe 376 of one of the soil cover suppression wheels 37 and the end of the soil cover suppression wheel mounting frame 800.

[0164] In the wide gap, a washer 810 is brought into contact with the end of the soil suppression wheel mounting frame 800, and a split pin 812 is inserted into a through hole 811 provided in the suppression shaft 801 to secure it in place. The split pin 812 prevents the suppression shaft 801 from slipping out in the left or right direction.

[0165] The end of the support pipe 376 of the other soil-covering press wheel 37 and the end of the soil-covering press wheel mounting frame 800 are in contact with each other.

[0166] The state shown in Figures 22 and 23 is the position of the left and right soil-covering wheels 37, 37 with wide row spacing.

[0167] To narrow the row spacing, move the support pipe 376 of one of the soil suppression wheels 37 closer to the soil suppression wheel mounting frame 800, align the mounting hole 803 of the base arm 802 with the left mounting hole 805 of the mounting arm 804, and secure both arms 802, 804 with bolts to narrow the spacing between the left and right soil suppression wheels 37, 37.

[0168] <Other embodiments> (1) FIG. 13 shows another embodiment in which a rotation support pin 508, which serves as a rotation fulcrum for the work seat 46, is attached to the seat mounting frame 501.

[0169] That is, a rotation support pin 508 which serves as a rotation fulcrum for the work seat 46 is provided at the rear end of a seat support plate 506 at the bottom of the work seat 46, and the rear end of a slide plate 521 having a long hole 520 in the front-to-rear direction is pivotally supported on the rotation support pin 508.

[0170] The slide plate 521 has a support piece 523 formed integrally with it at its rear end facing upward, and a rotation support pin 508 is inserted into a through hole 524 formed in the support piece 523, so that the slide plate 521 is rotatably mounted on the rear end of the seat support plate 506 by the rotation support pin 508. The rear end of the work seat 46 and the rear end of the seat support plate 506 are at approximately the same position, and the seat support plate 506 does not protrude rearward from the rear end of the work seat 46.

[0171] The slide plate 521 is provided with a long hole 520 in the front-rear direction, and the long hole 520 is provided with three position adjustment holding recesses 504 facing upward.

[0172] A positioning pin 525 extending in the left-right direction of the aircraft body is provided at the rear of the seat mounting frame 501 at the upper rear end, and a posture maintaining pin 526 extending in the left-right direction of the aircraft body is provided below and forward of the positioning pin 525.

[0173] The positioning pin 525 and the posture maintaining pin 526 are inserted into the elongated hole 520. When the positioning pin 525 is engaged with one of the position adjustment holding recesses 504, the posture maintaining pin 526 is positioned in the elongated hole 520, which is outside the position adjustment holding recess 504 and has a narrow vertical width.

[0174] Therefore, when the positioning pin 525 is engaged with the rearmost position adjustment and holding recess 504 of the slide plate 521, the work seat 46 is adjusted to its forward-most position, away from the front straight portion 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a tall operator to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43. At this time, the posture holding pin 526 is located in the elongated hole 520 with a narrow vertical width outside the position adjustment and holding recess 504, preventing rattling of the work seat 46 and preventing erroneous detection by the seat detection sensor 195.

[0175] Furthermore, when the positioning pin 525 is engaged with the frontmost position adjustment and holding recess 504, the work seat 46 is adjusted to its rearmost position, close to the front straight section 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a short worker to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43. At this time, the posture holding pin 526 is located in the elongated hole 520 with a narrow vertical width outside the position adjustment and holding recess 504, preventing rattling of the work seat 46 and preventing erroneous detection by the seat detection sensor 195.

[0176] Furthermore, when the positioning pin 525 is engaged with the intermediate position adjustment and holding recess 504, the work seat 46 is adjusted to a position intermediate in the front-to-rear direction, which is suitable for a worker of average height to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43. At this time, the posture holding pin 526 is located in the elongated hole 520 with a narrow vertical width outside the position adjustment and holding recess 504, which prevents the work seat 46 from wobbling and prevents erroneous detection by the seat detection sensor 195.

[0177] Furthermore, no matter which position adjustment holding recess 504 the positioning pin 525 is engaged with to adjust the front-to-rear position of the work seat 46, the support members of the work seat 46 (seat mounting frame 501 and slide plate 521) do not protrude rearward from the rear end of the work seat 46, so they do not get in the way when transplanting seedlings, making work easier. (2) FIGS. 14 and 15 show another embodiment in which the seating detection sensor 195 and a second seating detection sensor 550 are provided on the seat frame 500. In the embodiment shown in FIG.

[0178] That is, the seat frame 500 is composed of a vertical seat frame 500a whose base is fixed to the traveling vehicle body 40, and a mounting frame 500b to which a seat mounting frame 501 is mounted.

[0179] A through hole 551 is formed in the upper part of the vertical seat frame 500a. The lower part of the mounting frame 500b is fitted into the through hole 551.

[0180] A second seating detection sensor 550 is provided at the bottom of the through-hole 551 . A convex rib 552 is formed on the mounting frame 500b, and a compression spring 553 is provided between the convex rib 552 and the upper end surface of the vertical seat frame 500a.

[0181] Therefore, when no worker is seated on the work seat 46, the upward biasing force of the compression spring 553 keeps the mounting frame 500b in an upper position, and the lower end of the mounting frame 500b is located above and away from the second seating detection sensor 550, so that the second seating detection sensor 550 is OFF.

[0182] When an operator is seated on the work seat 46, the operator's weight moves the mounting frame 500b downward against the upward biasing force of the compression spring 553, and the lower end of the mounting frame 500b presses the second seating detection sensor 550, turning the second seating detection sensor 550 ON.

[0183] When the transplanter 10 is traveling along the ridges and the operator is seated in the work seat 46 with his back to the direction of travel and performing seedling transplanting work in normal conditions, the first engine switch 407, second engine switch 408, seat detection sensor 195, second seat detection sensor 550, ridge edge detection switch 186 and left and right excessive tilt sensors 194, 194 in the electrical circuit diagram of the engine 41 in Figure 15 are all turned ON, and the engine 41 is running.

[0184] Then, as the transplanter 10 continues to move forward while performing transplanting work and reaches the end of the ridge, and the ridge contact ground roller 184 of the ridge end sensor 182 no longer contacts the ridge surface, the sensor arm 183 rotates downward due to the force of the ground contact spring 185 and the weight of the sensor arm 183 and the ridge contact ground roller 184, and the ridge end detection switch 186 is no longer pressed and turns OFF, the engine 41 stops, and the transplanter 10 stops.

[0185] In particular, since the seating detection sensor 195 and the second seating detection sensor 550 are arranged in parallel as shown in the electrical circuit diagram of the engine 41, even if the seating detection sensor 195 turns OFF due to a change in the worker's seating posture, the second seating detection sensor 550 is ON, so while the worker is seated in the work seat 46 and performing seedling transplanting work in normal conditions, the engine 41 will not stop and the transplanter 10 will not stop.

[0186] That is, if either the seating detection sensor 195 or the second seating detection sensor 550 is ON, the seating of the worker is detected, so that the seating of the worker can be reliably detected. (3) FIG. 16 shows another embodiment in which a second seating detection sensor 550 is provided.

[0187] That is, a vertically long hole 560 is provided in the seat mounting frame 501, and a second seating detection sensor 550 is provided below the long hole 560.

[0188] A seat fixing plate 562 is provided on the underside of the front of the seat support plate 506 of the work seat 46, and is provided with three seat front-rear adjustment holes 561 arranged in parallel in the front-rear direction.

[0189] A compression spring 563 is provided between the seat support plate 506 and the seat mounting frame 501 .

[0190] The work seat 46 is rotatably mounted by inserting a rotation support pin 508 into an elongated hole 560 of the seat mounting frame 501 and one of three seat front-rear adjustment holes 561 of the seat fixing plate 562 .

[0191] When the pivot support pin 508 is inserted through the long hole 560 of the seat mounting frame 501 and the seat front / rear adjustment hole 561 at the rearmost part of the seat fixing plate 562 so as to be rotatable, the work seat 46, when adjusted to its forward-most position, is located away from the front straight portion 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a tall worker to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43.

[0192] Furthermore, when the pivot support pin 508 is inserted through the long hole 560 of the seat mounting frame 501 and the frontmost seat front / rear adjustment hole 561 of the seat fixing plate 562 so as to be rotatable, the work seat 46, when adjusted to its rearmost position, is positioned close to the front straight section 28 of the circular movement path of the seedling container 22 of the seedling supply device 43, making it suitable for a short worker to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43.

[0193] Furthermore, when the pivot support pin 508 is inserted through the long hole 560 of the seat mounting frame 501 and the seat front-to-back adjustment hole 561 located midway between the front and back of the seat fixing plate 562 so that the work seat 46 can be freely rotated, the work seat 46 can be adjusted to a position midway between the front and back, making it suitable for a worker of average height to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43.

[0194] When no worker is seated on the work seat 46, the upward biasing force of the compression spring 563 keeps the work seat 46 in an upper position, the rotation support pin 508 is at the upper end of the elongated hole 560 of the seat mounting frame 501, the lower edge of the seat fixing plate 562 is at an upper position away from the second seating detection sensor 550, and the second seating detection sensor 550 is OFF.

[0195] When an operator is seated on the work seat 46, the operator's weight moves the work seat 46 downward against the upward biasing force of the compression spring 563, and the rotation support pin 508 is located at the lower end of the elongated hole 560 of the seat mounting frame 501, and the second seating detection sensor 550 is pressed by the lower edge of the seat fixing plate 562 and turned ON.

[0196] Therefore, as in the previous item (2), the seating detection sensor 195 and the second seating detection sensor 550 are arranged in parallel as shown in the electrical circuit diagram of the engine 41 in Figure 15, so if either the seating detection sensor 195 or the second seating detection sensor 550 is ON, it detects that the worker is seated, so that the worker can be reliably detected as being seated. (4) FIG. 24 shows another embodiment of a water tank holder 601 for holding a water tank 600.

[0197] That is, the upper part of the support bracket 900 is fixed to the outer end face of the side step 118 with bolts, and the water tank holder 601 is fixed to the support bracket 900 with bolts.

[0198] The support bracket 900 has an L-shaped mounting plate 901 formed when viewed from the front, with two mounting holes 902 on the vertical surface and two mounting holes 903 on the horizontal surface extending outward from the fuselage.

[0199] The water tank holder 601 is constructed as a frame, and has two mounting holes 905 on the vertical surface of a U-shaped frame 904 at the midpoint between the front and rear, and two mounting holes 906 on the horizontal surface.

[0200] Two mounting holes 902 on the vertical surface of L-shaped mounting plate 901 of support bracket 900 are aligned with two mounting holes 905 on the vertical surface of U-shaped frame 904 of water tank holder 601 and fixed with bolts, and two mounting holes 903 on the horizontal surface of L-shaped mounting plate 901 of support bracket 900 are aligned with two mounting holes 906 on the horizontal surface of U-shaped frame 904 of water tank holder 601 and fixed with bolts to assemble water tank holder 601. Note that water tank holder 601 on the opposite side in the left-right direction of the aircraft is assembled in the same manner, being symmetrical.

[0201] In particular, the mounting position of the water tank holder 601 on the running body 40 is set so that the rear end of the water tank holder 601 is positioned forward and away from the support pipes 376, 376 provided at the base of the suppression arms 370, 370 of the left and right soil suppression wheels 37, 37 which are rotatably mounted on the suppression shaft 801 inserted and supported in the soil suppression wheel mounting frame 800.

[0202] Therefore, when the support pipes 376, 376 provided at the bases of the suppression arms 370, 370 of the left and right soil suppression wheels 37, 37 are pulled outward to the left and right from the suppression shaft 801, the water tank holder 601 does not get in the way, making maintenance of the machine easier. [Explanation of symbols]

[0203] 40 Running vehicle 42 Planting equipment 46 Work seat 195 Seated detection sensor 500 seat frame 501 Seat mounting frame 502 Seat position adjustment slot 504 Position adjustment holding recess 506 Seat support member 508 Rotation support pin 510 Pressing member 520 long hole 521 Slide Plate 525 pins 526 Posture-Maintaining Pin 550 Second seating detection sensor

Claims

1. A transplanter having a traveling vehicle body (40) provided with a traveling device (44) and planting devices (20a, 20b), A rotatable pressure device (37) is provided for leveling the soil around the seedlings planted by the planting devices (20a, 20b), and The suppression device (37) is composed of left and right suppression arms (370, 370) each rotatably attached to the traveling vehicle body (40), and suppression rotors (371, 371) provided on the left and right suppression arms (370, 370), a stopping member (194) that comes into contact with the suppressing device (37) to stop the traveling device (44) and the planting device (20a, 20b) when the tilt angle in the front-rear direction of the traveling vehicle body (40) becomes equal to or greater than a predetermined angle; A transplanter characterized in that a pressing pin (370b, 370b) provided on an operating piece (370a, 370a) extending from the mounting base of the left and right suppression arms (370, 370) operates a stopping member (194).

2. The left and right suppression arms (370, 370) are configured to be movable in the left and right directions of the aircraft body, The pressing pins (370b, 370b) are configured to extend on both the left and right sides of the operating pieces (370a, 370a), A transplanter as described in claim 1, characterized in that when the left and right suppression arms (370, 370) are moved inward in the left-right direction of the machine body to narrow the row spacing, the stopping members (194) are activated by the outward extending portions of the pressing pins (370b, 370b), and when the row spacing is widened by moving them outward in the left-right direction of the machine body, the stopping members (194) are activated by the inward extending portions of the pressing pins (370b, 370b).

3. A seating detection sensor (195) for detecting the seating of an operator is provided on the work seat (46), and when the seating detection sensor (195) detects the seating of an operator, if the stopping member (194) detects an inclination of a predetermined angle or more, the running device (44) and the planting device (20a, 20b) are stopped, and when the seating of an operator is not detected, the stopping member (194) does not stop the running device (44) and the planting device (20a, 20b) even if it detects an inclination of a predetermined angle or more. The work seat (46) is provided with a seat support plate (506) at the bottom, At the rear of the seat support plate (506), a seat support arm (507) is extended downward, and a pivot support pin (508) for rotation in the left-right direction of the aircraft body is provided at the bottom of the seat support arm (507). A front support member (509) for supporting the front of the work seat (46) is provided at the front of the seat support plate (506), A transplanter according to claim 2, characterized in that a pressing member (510) is provided at a position slightly rearward of the front support member (509) of the seat support plate (506) to press the seating detection sensor (195) through a through hole (505) of the seat mounting frame (501).

Images