Transplanter

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 transplanting machine for transplanting vegetable seedlings such as onions and lettuces into a field.

Background Art

[0002] In paragraph 0210 of Patent Document 1, left and right excessive inclination sensors 194, 194 are respectively provided which come into contact with the left and right pressing arms 370, 370 when the traveling vehicle body 40 rotates by a predetermined angle or more. When either the left or right one of the left and right excessive inclination sensors 194, 194 is pushed and enters a detection state, it is determined that the traveling vehicle body 40 is in a posture of tilting forward upward by a predetermined angle (e.g., 5 to 10 degrees) or more, and the engine 41 is stopped, or in the transmission case 39, the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26 is blocked.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present invention is to provide a transplanting machine that can cope with tilting even when the left and right pressing arms are moved in the left-right direction of the machine body by changing the row spacing.

Means for Solving the Problems

[0005] The invention according to claim 1 is a transplanting machine provided with a traveling device (44) and a planting device (20a, 20b) on a traveling vehicle body (40), a pressing device (37) for leveling the soil around the seedlings planted by the planting device (20a, 20b) is rotatably provided, and The compressing device (37) is composed of left and right compressing arms (370, 370) rotatably mounted on the traveling vehicle body (40) respectively, and compressing rotating bodies (371, 371) provided on the left and right compressing arms (370, 370). When the inclination angle of the traveling vehicle body (40) in the front-rear direction becomes a predetermined angle or more, a stop member (194) is provided which contacts the compressing device (37) to stop the traveling device (44) and the planting devices (20a, 20b). The transplanter is characterized in that a pressing pin (370b, 370b) provided on an operating piece (370a, 370a) extending from the mounting base portions of the left and right compressing arms (370, 370) operates the stop member (194).

[0006] According to the invention described in claim 2, the left and right compressing arms (370, 370) are configured to be movable in the left-right direction of the machine body. The pressing pins (370b, 370b) are configured to extend to both the left and right sides of the operating pieces (370a, 370a). When the space between rows is narrowed by moving the left and right compressing arms (370, 370) inward in the left-right direction of the machine body, the stop member (194) is operated by the portion extending outside the pressing pins (370b, 370b), and when the space between rows is widened by moving the left and right compressing arms (370, 370) outward in the left-right direction of the machine body, the stop member (194) is operated by the portion extending inside the pressing pins (370b, 370b). The transplanter according to claim 1 is characterized by this.

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

Advantages of the Invention

[0008] According to the present invention, when changing the row spacing of the pressing device, there is no need to adjust the position of the pressing pin or the position of the stop member, and the workability is good.

Brief Description of the Drawings

[0009]

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Mode for Carrying Out the Invention

[0010] Hereinafter, preferred embodiments of the present invention will 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 the transplanter according to the 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 steering handle 47 is arranged is regarded as the rear, and the opposite side, that is, the side where the engine 41 is arranged is regarded as the front. And the right hand side is the right and the left hand side is the left toward the front side of the machine body.

[0013] As shown in FIGS. 1 to 5, the transplanter 10 of the present embodiment includes a traveling vehicle body 40 that enables the machine body to travel forward, a steering handle 47 for walking operation provided at the rear of the traveling vehicle body 40, a planting device 42 for planting seedlings in the field, and a seedling supply device 43 for supplying seedlings to the planting device 42.

[0014] The traveling body 40 is provided with a transmission case 39 at the front part of the body, and an engine 41, which is a driving device, is provided on the front side of the transmission case 39. Axle covers 101 that cover axles capable of adjusting the tread to change the left and right positions of the rear wheels 44 are respectively connected to the lower parts of the rear sides of the body on both the left and right sides of the transmission case 39, and traveling transmission cases 38 that transmit driving force to the rear wheels 44 provided on the rear side of the body are respectively mounted on the outer ends of the axle covers 101 so as to be capable of turning up and down.

[0015] Then, a base plate 400 that covers at least the left and right side surfaces and the rear surface of the transmission case 26 is provided on a transmission case 26 that branches and supplies driving force from the transmission case 39 to the planting device 42 and the seedling supply device 43, and a frame stay 401 is detachably provided at the rear part of the base plate 400 via a fixing member such as a bolt. A handle frame 402 that protrudes in a shape that draws an arc toward the upper rear side of the body is provided on the frame stay 401, and a control unit 403 for operating the up and down adjustment of the vehicle height, the switching of the transmission for traveling and planting operations, etc. is provided at the rear part of the handle frame 402, and a control handle 47 that an operator grips when operating the body during movement when planting of seedlings is not performed, etc. is provided. The control handle 47 is shaped to bend in the left and right direction of the body and toward the rear of the body around the handle frame 402, and side clutch operation levers 405 for switching the transmission to the rear wheels 44 are respectively provided on the left and right rear parts. Also, a first throttle lever 406 for increasing and decreasing the output of the engine 41 is provided on either the left or right side of the control handle 47.

[0016] A control panel 47a is provided between the left and right sides of the steering wheel 47. On the control panel 47a, there are provided a vehicle height adjustment lever 123 for adjusting the vehicle height of the traveling vehicle body 40 by telescoping operation of the lifting hydraulic cylinder 300, a main clutch lever 125 for engaging and disengaging the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26, a first engine switch 407 for switching the permission of starting the engine 41 and performing a stop operation, and a main shift lever 150 for switching the traveling transmission of the traveling vehicle body 40 to any one of a forward speed, a planting operation speed, a traveling neutral, and a reverse.

[0017] When permitting the starting of the engine 41, the operator pushes in and rotates the first engine switch 407 to the on position. Thereby, when the starting operation of the engine 41 is performed, the engine 41 starts. Note that the starting of the engine 41 may use a cell starter or a recoil starter. Further, even when it is a driving device other than the engine 41, for example, one that operates with an electric motor, when the first engine switch 407 is in the on position, power is supplied to the electric motor to start it.

[0018] When stopping the engine 41, when the operator lightly pushes in the first engine switch 407, it switches to the off position by the force of an internally installed torque spring (not shown), and thereby the engine 41 enters a stopped state.

[0019] During the off operation, it is only necessary to lightly push in the first engine switch 407, so traveling and planting can be stopped immediately. Thereby, when reaching the end of the ridge, traveling and planting stop immediately, so the seedling planting operation at a location other than the ridge is prevented, and the seedlings consumed unnecessarily are reduced. Also, when moving the machine body to the ridge where the next planting operation is to be performed, no extra movement occurs, so fuel consumption and working time are reduced.

[0020] In front of the machine body side of the steering handle 47 and above the transmission case 26, there is provided a seedling supply device 43 that conveys the seedlings input by the operator to the left and right planting hoppers 20a and 20b, which will be described later. A reinforcing frame 152 in the front-rear direction is provided across the rear part of the seedling supply device 43 and the reinforcing connecting stay 151 provided at the upper rear side of the handle frame 402 and in front of the control panel 47a to improve the strength in the vicinity of the steering handle 47 and the seedling supply device 43 and reduce vibration.

[0021] And between the front and rear of the reinforcing frame 152, a rotation support plate 153 in an L-shape in side view is mounted in a posture protruding toward the other side (right side of the machine body) of the machine body left and right in rear view. The rotation support plate 153 has the other side of the machine body left and right open, and the base of the visual recognition rotation arm 154 is rotatably mounted on this open side. The visual recognition rotation arm 154 is rotatable until it contacts the handle frame 402 on one side (left side of the machine body) of the machine body left and right, and is rotatable until it contacts the rotation support plate 153 on the other side of the machine body left and right. In other words, when the visual recognition rotation arm 154 is rotated in the direction of the other side of the machine body left and right by the rotation support plate 153, the rotation is restricted by the rotation restricting portion 153a located on the lower side of the machine body at a position where the seedling supply device 43 and the visual recognition rotation arm 154 are substantially parallel or in a downward inclined posture facing outward of the machine body.

[0022] Below the portion where the visual recognition rotation arm 154 is provided, the up-and-down movement mechanism 21 on the other side of the machine body left and right for raising and lowering the planting hopper 20b on the other side of the machine body left and right is arranged to be rotatable up and down. However, the visual recognition rotation arm 154 rotated to the other side of the machine body left and right until it contacts the rotation restricting portion 153a is arranged to be located above the machine body compared to the up-and-down movement mechanism 21 rotated upward to the maximum extent.

[0023] On the end side of the visual recognition swing arm 154, a visual recognition member 155 is rotatably provided so that the scenery in the traveling direction of the traveling vehicle body 40, that is, the scenery on the front side of the machine body, is reflected and visible to an operator who boards with their back facing the traveling direction of the traveling vehicle body 40 on the work seat 46 and the floor step 122 described later. More specifically, the visual recognition 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 portion (not shown) on the visual recognition swing arm 154 side, and is configured to be rotatable and adjustable in angle.

[0024] If the visual recognition member 155 is a mirror 155a, it can reflect the scenery on the front side of the machine body just by being mounted, so an increase in cost due to mounting can be suppressed. In a field where seedling planting work is performed, it is conceivable that it may be difficult to see due to sunlight or reflection of surrounding lighting depending on the working hours and working location, so it is preferable to be able to mount a shade body (not shown) or the like on the upper side of the mirror 155a.

[0025] In the above configuration, the visual recognition swing arm 154 can be rotated in an arc shape in the left-right direction of the machine body around the rotation axis in the front-rear direction, and the left-right position and the up-down height of the visual recognition member 155 can be changed. Therefore, according to the working posture of the operator and the physique of the operator, the scenery in front of the machine body reflected on the visual recognition member 155 can be made easy to see. As a result, the operator can surely discover the approach to the ridge end where the seedling planting work is completed, the presence or absence of obstacles on the travel path, etc., so that the seedlings are wasted and planted in places other than the ridge, and the traveling vehicle body 40 is damaged by contact with obstacles. This is prevented.

[0026] In addition, although the operator needs to turn their back to the traveling direction and put seedlings into the seedling supply device 43 arranged on the rear side of the machine body, there is no need to turn their back to see the state on the front side of the machine body. This prevents the so-called missing plants from occurring, where the supply of seedlings is interrupted and the planting hoppers 20a and 20b do not plant seedlings in the field.

[0027] As a result, the operator does not need to manually plant seedlings at the location where missing plants occur, and the labor of the operator is reduced.

[0028] When the visual recognition rotating arm 154 is rotated toward one side of the left and right of the machine body during storage or the like, the visual recognition rotating arm 154 is located inside the machine body rather than at the end of one side of the left and right of the machine body and is accommodated within the left and right width of the machine body. Therefore, the visual recognition device 157 is prevented from being caught and damaged at the storage location.

[0029] Also, when the visual recognition rotating arm 154 is rotated to the maximum extent toward the rotation restricting portion 153a on the other side of the left and right of the machine body during non-use or the like, the visual recognition rotating arm 154 is located at an upper position where it does not interfere with the vertical movement mechanism 21. Therefore, the visual recognition rotating arm 154 is prevented from being damaged by contact with the vertical movement mechanism 21.

[0030] Furthermore, since the base side of the visual recognition member 155 is provided between the front and rear of the reinforcing frame 152, vibration of the machine body is less likely to be transmitted to the visual recognition member 155, and the scenery reflected on the visual recognition member 155 is easier to view.

[0031] Also, by connecting the handle frame 402 and the seedling supply device 43 with the reinforcing frame 152, the strength of the machine body is improved.

[0032] Note that the attachment of the visual recognition rotating arm 154 to the rotation support plate 153 is made with double nuts. While preventing it from coming off and rotating downward due to its own weight, if the attachment method allows it to be rotated with a light force by the operator's rotation operation, the adjustment work is easy and can be performed without tools.

[0033] On the front side of the machine body and on both the left and right sides of the mission case 39, bumper support frames 108 having a U-shaped cross-section in a front cross-sectional view are provided so as to protrude forward of the machine body. And in front of the left and right bumper support frames 108, a bumper 109 protruding forward of the machine body is provided.

[0034] Incidentally, the bumper 109 is composed of a bumper plate 109a obtained by bending the front side and both left and right sides of the plate body downward, a front weight 109b that is detachable from the upper surface of the bumper plate 109a, and a bumper rod 109c that extends in the left-right direction from the bumper plate 109a. The front weight 109b is formed of a mass of a material such as iron that is relatively heavy and has high hardness, and has a shape that protrudes forward of the machine body more than the bumper plate 109a.

[0035] As a result, since the front weight 109b, which is a mass having weight and hardness, protrudes most forward of the machine body, it is possible to prevent damage from reaching the bumper plate 109a when contacting an obstacle.

[0036] On the front side of the machine body and on the lower side of the left and right bumper support frames 108, recesses (not shown) with an opening at the lower side of the machine body are formed, and a front beam frame 110 having a longitudinal direction in the left-right direction of the machine body is inserted and fixed in these recesses.

[0037] By providing the front beam frame 110, a frame is assembled in a square shape also on the front side of the machine body by the left and right bumper support frames 108 and the transmission case 39, so the strength of the front side of the machine body is improved. In particular, when the bumper 109 contacts an obstacle, since the left and right bumper support frames 108 are inserted and fixed to the front beam frame 110, it becomes difficult for damage and impact to propagate to the rear side of the left and right bumper support frames 108.

[0038] Also, when assembling the transmission case 39 to the machine body, by inserting the recesses of the left and right bumper support frames 108 into the front beam frame 110 and then moving them in the left-right direction, the front-rear position of the transmission case 39 is fixed and the left-right position can be adjusted, so it is possible to prevent the assembly work from being delayed due to displacement of the mounting position of the transmission case 39.

[0039] Note that the rear part of the engine 41 is loaded on the front side and one side (left or right) of the mission case 39, and the front part of the engine 41 is loaded on an engine mount arranged near the left and right center parts of the front beam frame 110. However, the bumper support frame 108 on the side where the engine 41 is arranged and the engine 41 are arranged with a vertical gap therebetween. That is, the bumper support frame 108 is not a member that receives the engine 41 from below.

[0040] With the above configuration, it is possible to prevent the impact when the bumper 109 contacts an obstacle from being transmitted from the bumper support frame 108 to the engine 41, so that the engine 41 can be prevented from being damaged or malfunctioning due to the impact.

[0041] Also, even if the bumper support frame 108 is deformed by an impact, it is configured to hardly affect the mounting state of the engine 41, and even if the bumper 109 is damaged, the engine 41 can be used for work and movement.

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

[0043] The upper surfaces of the left and right step support plates 111 are flat. On one side (left side) of the traveling vehicle body 40 in the left - right direction of the machine body, the front - side part of the front boarding step 113 on which an operator places his / her foot when getting on and off from the front side of the machine body is mounted. On the other side (right side) of the machine body in the left - right direction, that is, on the right side of the machine body, when the plant - to - plant interval, that is, the so - called plant spacing, between the seedlings to be planted by the planting hoppers 20a and 20b is set, and the plant - spacing main speed change lever 801, the plant - spacing sub - speed change lever 802, and the main speed change lever 150 are operated at the planting speed, a planting speed change lever 803 for selecting the first planting speed or the second planting speed is supported, and a plant - spacing switching cover 114 is formed.

[0044] The front boarding step 113 includes a lower footrest portion 113a located on the front side of the machine body and on the lower side in the vertical direction, an upper footrest portion 113b located on the rear side of the machine body and on the upper side in the vertical direction with respect to the lower footrest portion 113a, and an intermediate inclined portion 113c located between the lower footrest portion 113a and the upper footrest portion 113b in the vertical direction 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 portion 113a. The intermediate inclined portion 113c has an inclined angle at which it is psychologically difficult for an operator to place their foot when getting on and off, and a front-rear length that allows the operator to straddle and pass through when moving between the lower footrest portion 113a and the upper footrest portion 113b.

[0045] On the other hand, the row shift cover 114 includes a lower base portion 114a located on the front side of the machine body and on the lower side in the vertical direction, an upper base portion 114b located on the rear side of the machine body and on the upper side in the vertical direction with respect to the lower base portion 114a, and a lever mounting portion 114c located between the lower base portion 114a and the upper base portion 114b in the vertical direction, which is twisted and inclined toward the outside of the machine body and forms movement grooves through which the row main shift lever 801, the row sub-shift lever 802, and the main shift lever 150 move respectively.

[0046] Note that the front boarding step 113 and the row shift cover 114 have a bilaterally symmetric shape. It is also possible to use the row shift cover 114 for the side on one side of the left and right of the machine body, and the front boarding step 113 for the side on the other side of the left and right of the machine body.

[0047] Then, on the rear side of the machine body of the upper footrest portion 113b and the upper base portion 114b, side steps 118 are respectively provided for the operator to get on and off from the side of the machine body and to serve as a foothold during work. The side step 118 is configured to form a plurality of space portions by arranging plate bodies vertically and horizontally within a frame, and to allow the soil adhering to the sole of the operator's shoe to fall downward. Further, a center step 119 serving as a foothold for the operator getting on is detachably provided between the left and right of the left and right side steps 118.

[0048] As described above, the floor step 122 is configured.

[0049] The attachment of the front boarding step 113, the inter-row switching cover 114, the left and right side steps 118, and the center step 119 shall be carried out independently, that is, they shall not be fastened together with a single attachment member (such as a bolt). As a result, when removing each step assembly during partial maintenance work, there is no need to remove another step assembly, improving the efficiency of maintenance work.

[0050] An embarkation and disembarkation assistance mechanism 170 is mounted at the lower front part of the front boarding step 113 for an operator to place their foot when getting on and off the front boarding step 113. The embarkation and disembarkation assistance mechanism 170 includes an outer support arm 171 located outside the machine body, which is L-shaped in side view and has a first protruding portion 171a protruding forward of the machine body below the machine body from the bent portion, an inner support arm 172 located inside the machine body, which is L-shaped in front view and has a second protruding portion 172a protruding outside the machine body below the machine body from the bent portion, and an embarkation and disembarkation assistance step 173 provided across the first protruding portion 171a and the second protruding portion 172a.

[0051] The outer support arm 171 is fastened to the traveling vehicle body 40 together with the step support plate 111 with a fastening bolt 174.... Further, the inner support arm 172 is fastened to the traveling vehicle body 40 together with the bumper plate 109a with a fastening bolt 174....

[0052] As a result, since a plurality of members are tightened with the fastening bolt 174...., the strength near the front side of the machine body of the traveling vehicle body 40 is improved, and a decrease in durability due to the load during the operator's getting on and off is reduced.

[0053] In addition, by providing the embarkation and disembarkation assistance step 173, even if the vehicle height of the traveling vehicle body 40 is increased according to the height of the ridge, etc., the operator can place their foot on the embarkation and disembarkation assistance step 173 and step onto the footrest portion 113a below the front boarding step 113 step by step to board, and can get off by the reverse operation. Therefore, there is no need to raise the foot high or jump off to some extent when getting on and off, reducing the burden on the operator's body.

[0054] And, by providing the boarding / alighting assisting step 173 across the first protruding portion 171a and the second protruding portion 172a, since the outer support arm 171 and the inner support arm 172 are not positioned within the left - right width of the boarding / alighting assisting step 173, contact between the operator's foot and the outer support arm 171 and the inner support arm 172 is prevented.

[0055] On the other hand, when the vehicle height of the traveling vehicle body 40 is lowered or during the planting operation, not only is the boarding / alighting assisting mechanism 170 unnecessary, but depending on the vehicle height, it may contact the ridge surface or the side surface of the ridge, collapse the ridge, and reduce the planting accuracy of 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 rotatably attached with the tightening bolt 174... as a rotation fulcrum, and the boarding / alighting assisting mechanism 170 may be configured to be rotatable up and down.

[0057] With the above configuration, when it is unnecessary, the boarding / alighting assisting mechanism 170 can be rotated upward to be separated from the ridge surface, so that the boarding / alighting assisting mechanism 170 is prevented from collapsing the ridge, and the planting accuracy of the seedlings is maintained.

[0058] As shown in FIGS. 1 to 8, at the lower part of the plant - spacing switching cover 114, a ridge - end sensor stay 182a that supports a ridge - end sensor 182 is provided. The ridge - end sensor 182 operates a notification device 181 that rotates downward by its own weight to contact the ridge surface, further rotates downward when the traveling vehicle body 40 reaches the end of the ridge and loses contact with the ground, and notifies the operator that the vehicle has reached the field end. The notification device 181 is a buzzer, a lamp attached to each part of the traveling vehicle body 40, or a communication device that notifies the operator's information terminal (tablet, smartphone, etc.).

[0059] The ridge end sensor 182 is provided with a sensor arm 183 rotatably, a ridge surface grounding roller 184 is rotatably attached to the lower part of the sensor arm 183, a grounding biasing spring 185 for biasing the sensor arm 183 downward is provided, and a ridge end detection switch 186 that turns on (or off) when a predetermined angle or more is reached is provided at the base of the sensor arm 183. The grounding biasing spring 185 has its upper end side attached to a detection adjustment plate 187 that can be adjusted in angle along an elongated hole, and is configured to be able to change the operating angle according to the ridge height.

[0060] This ridge end sensor 182 is grounded on the ridge surface by adjusting the vehicle height of the traveling vehicle body 40 at the start of the seedling planting operation. By grounding the rotatable ridge surface grounding roller 184, it is difficult to collapse the ridge surface and fine unevenness can be leveled, improving the seedling planting accuracy.

[0061] Then, when the traveling vehicle body 40 continues to move forward and reaches the end of the ridge and the ridge surface grounding roller 184 no longer contacts the ridge surface, due to the biasing force of the grounding biasing spring 185 and the self-weight of the sensor arm 183 and the ridge surface grounding roller 184, the sensor arm 183 rotates downward and the ridge end detection switch 186 is not pressed. When the ridge end detection switch 186 is not pressed, the notification device 181 is energized, causing the notification device 181 to operate and notify the operator that the vicinity of the front end of the vehicle body of the traveling vehicle body 40 has reached the ridge end.

[0062] Note that when the ridge end sensor 182 detects the ridge end, since there is still a planting space for several plants left on the ridge, the operator does not immediately stop the machine body, but prepares for the stop operation while putting the number of seedlings that can be planted in the remaining planting space into the seedling supply device 43.

[0063] Thereby, the operator can know the approach to the ridge end without looking back, so the machine body can be stopped at the timing when the seedlings are finished being planted on the ridge, preventing fuel consumption due to extra running and an increase in the moving distance to the next working strip.

[0064] In addition, when the ridge edge approaches, the number of seedlings input into the seedling supply device 43 can be adjusted. Therefore, even if the stop operation of the planting operation travel is delayed and the planting hoppers 20a and 20b perform the planting operation, it is possible to prevent the seedlings from being discharged to a location other than the ridge.

[0065] Note that the sensor arm 183 may be configured as a pair of left and right sensor arms 183a and 183a, the ridge surface grounding rollers 184 may be rotatably attached to the left and right ridge surface grounding rollers 184a and 184a respectively, and the left and right ridge edge detection switches 186 and 186 may be provided respectively.

[0066] As a result, when either one of the left and right sensor arms 183 and 183 rotates downward and one of the corresponding ridge edge detection switches 186 and 186 is not pressed, the notification device 181 operates. Thus, even if the ridge edge collapses due to wind and rain and its shape is disturbed, the ridge edge can be easily detected, and the operator can perform the stop operation of the planting operation travel at the right timing.

[0067] In addition, on both the left and right sides of the front side of the machine body of the traveling vehicle body 40, and on the front side of the machine body rather than the rear wheels 44, front wheels 45 are provided which are rotatably supported via a horizontal frame 16 provided on the lower side of the front beam frame 110 and protruding in the left - right direction of the machine body.

[0068] Then, at the rotation axis position of the front part of the traveling transmission case 38, the tips of the wheel drive shafts extending from the transmission case 39 to both the left and right outer sides enter, and the traveling power that has passed through the traveling part system transmission part in the transmission case 39 is transmitted to the transmission mechanism in the traveling transmission case 38. And the traveling power is transmitted to the rear wheel axle 12 of the traveling transmission case 38 via the transmission mechanism in the traveling transmission case 38, and the rear wheels 44 are configured to be driven and rotated.

[0069] Note that the driving of each of the left and right rear wheels 44 can be cut off by left and right side clutches (not shown) provided in the transmission case 39. Therefore, when turning the machine body, one of the left and right rear wheels 44 on the inner side of the turn is set in a non - driven state by the side clutch, enabling smooth turning.

[0070] Further, a driving means that rotates up and down to move the rear wheels 44 up and down with the front side of the traveling transmission case 38 as a rotation fulcrum is connected to the traveling transmission case 38. Specifically, an arm extending upward is integrally attached to the attachment 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 a lifting hydraulic cylinder fixed to the transmission case 39. One side (right side) of the left and right is connected by a connecting rod, and the other side (left side) is connected by a left and right horizontal control hydraulic cylinder that can expand and contract in response to the inclination of the machine body.

[0071] When the lifting hydraulic cylinder operates and its piston rod protrudes rearward of the machine body, the left and right arms rotate rearward, and accordingly, the traveling transmission case 38 rotates downward, and the machine body rises. Conversely, when the piston rod of the lifting hydraulic cylinder moves forward of the machine body and retracts into the cylinder, the left and right arms rotate forward, and accordingly, the traveling transmission case 38 rotates upward, and the machine body descends.

[0072] This lifting hydraulic cylinder is operated by a field surface sensor that is grounded on the field surface and operates in accordance with fluctuations in the vertical distance between the machine body and the field surface. The operation of the field surface sensor is an operation to detect the height of the upper surface of the field based on the position of the machine body, and based on the detection operation of the field surface sensor, the lifting hydraulic cylinder is configured to operate so that the machine body reaches a set height corresponding to the height of the upper surface of the field.

[0073] Further, when the left and right horizontal control hydraulic cylinders expand and contract, the left arm connected to the left and right horizontal control hydraulic cylinders rotates, moving only the left rear wheel 44 up and down and tilting the machine body left and right. This left and right horizontal control hydraulic cylinder is configured to operate based on the detection result of a sensor that detects the left and right inclination of the machine body with respect to the left and right horizontal, and to level the machine body.

[0074] The transverse frame 16 is mounted on the front beam frame 110 so as to be roll-rotatable about the axial center in the front-rear direction. Vertical frames 17 that are long in the vertical direction are mounted on both the left and right sides of the transverse frame 16. The left and right front wheels 45 are rotatably attached to a front wheel axle 18 fixed to the side of the lower end portion of the vertical frame 17. Therefore, the left and right front wheels 45 are capable of rolling movement about the axial center in the front-rear direction at the left and right center of the machine body. Further, the vertical frames 17 are provided so as to be vertically adjustable with reference to both the left and right sides of the transverse frame 16, and the height of the front wheels 45 can be adjusted.

[0075] The steering handle 47 is provided at the rear part of the machine body and is located on the rear side of the machine body with respect to the rear wheel axle 12 of the rear wheels 44. Specifically, it is attached to the rear end portion of the machine body frame whose front end portion is fixed to the transmission case 39.

[0076] The machine body frame extends rearward at the left and right center of the machine body and also extends obliquely rearward and upward from the front-rear intermediate portion.

[0077] The steering handle 47 extends rearward to the left and right from the rear end portion of the machine body frame, and each rear end portion serves as the grip portion of the steering handle 47.

[0078] In the figure, the grip portion is configured to be divided into left and right, 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 connecting portion may serve as the grip portion.

[0079] The planting device 42 includes a plurality of beak-shaped planting tools whose tips face downward, a vertical movement mechanism 21 that moves the planting tools up and down between a position where the lower end portion of the planting tool is above the field surface and a position where it is below the field surface, and an opening / closing mechanism that opens and closes the planting tools between a closed state where the lower end portion of the beak-shaped planting tool is closed to receive seedlings from above and accommodate the seedlings inside, and an open state where the lower end portion of the planting tool opens to the left and right to release the seedlings accommodated inside downward.

[0080] As shown in FIGS. 1 to 5, the planting device 42 of the present embodiment has a two-row planting configuration in which the first planting hopper 20a and the second planting hopper 20b are arranged side by side left and right. 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 transmitted from a mission case 39.

[0081] Each seedling container 22 of the seedling supply device 43 has a cylindrical body that opens vertically and a bottom lid that opens and closes the opening on the lower side of the cylindrical body, and they are connected to each other in a loop shape.

[0082] Then, in a state where the connected seedling containers 22 pass near the upper sides of the left and right planting hoppers 20a and 20b, the moving mechanism rotates the connected seedling containers 22 counterclockwise in an oval loop-shaped trajectory that is long left and right in a plan view of the machine body.

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

[0084] The operator sits on the work seat 46 and performs the work of supplying seedlings to each seedling container 22 of the seedling supply device 43. However, when the supplementary seedlings run out or when any problems occur, for example, the planting posture of the seedlings is continuously abnormal, the seedlings cannot be planted, etc., it is necessary to stop the running of the traveling vehicle body 40 or stop the driving of the planting hoppers 20a and 20b. Also, when the traveling speed or the lifting and lowering speed of the planting hoppers 20a and 20b is faster than the operator's pace, it is necessary to reduce the output of the engine 41 and change it to a speed at which the work can be easily performed.

[0085] In order to perform the above operations while seated on the work seat 46, on the front side of the machine body of the seedling supply device 43 and at one end on the left or right side, that is, on the right side of the operator seated on the work seat 46, a second engine switch 408 for switching the startability of the engine 41 and performing a stop operation is provided, and at a position closer to the inside of the machine body (the other side in the left-right direction of the machine body) than the second engine switch 408, a second throttle lever 409 for increasing or decreasing the output of the engine 41 is provided so as to be rotatable in the left-right direction of the machine body.

[0086] Note that the second engine switch 408 has the same operation method as the first engine switch 407, but the engine 41 shall not start unless both the first engine switch 407 and the second engine switch 408 are operated to the on position.

[0087] Thereby, when the operator holds and operates the steering wheel 47 at the rear of the machine body during movement or the like, the stop operation can be performed with the first engine switch 407, and when boarding the traveling vehicle body 40 during the seedling planting operation or the like, the second engine switch 408 can be turned off to stop the engine 41. Therefore, there is no need to get off the traveling vehicle body 40 during boarding and turn off the first engine switch 407, and the operation that causes problems in planting or the machine body can be interrupted.

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

[0089] Also, the left and right planting hoppers 20a, 20b are arranged behind the position of the rear wheel axle 12.

[0090] The seedling supply device 43 is configured such that the seedling container 22 makes a circular movement around the left and right planting hoppers 20a, 20b to supply seedlings.

[0091] Moreover, seedling containers 22 for accommodating seedlings to be dropped and supplied corresponding to the left and right planting hoppers 20a and 20b are provided separately. The bottom lids open only when the seedling containers 22 reach above the corresponding left and right planting hoppers 20a and 20b, and the bottom lids do not open above the non-corresponding left and right planting hoppers 20a and 20b.

[0092] Therefore, when an operator sitting on the work seat 46 supplies seedlings to each seedling container 22 of the seedling supply device 43, each seedling container 22 moves circumferentially in synchronization with the vertical movement of the left and right planting hoppers 20a and 20b. When the left and right planting hoppers 20a and 20b face the upper part of the planting locus, their bottom lids open and the seedlings are automatically dropped and put into the left and right planting hoppers 20a and 20b. (At the upper part of the planting locus where the left and right planting hoppers 20a and 20b move up and down by the vertical movement mechanism 21, the pair of beak-shaped planting tools that open and close at the lower part are closed.)

[0093] Then, the left and right planting hoppers 20a and 20b move downward by the vertical movement mechanism 21 and open at the lower part of the planting locus where the pair of beak-shaped planting tools penetrate into the field, plant the held seedlings into the field, and leave upward from the field while remaining open.

[0094] The transplanter 10 of the present embodiment is provided with soil covering and compressing wheels 37, which are used for soil covering and compressing according to the seedlings planted by the left and right planting hoppers 20a and 20b, at positions near the left and right rear sides of each seedling planting location of the left and right planting hoppers 20a and 20b.

[0095] The left and right soil covering and compressing wheels 37 are composed of pressing arms 370, 370 that are each individually rotatable up and down and are formed by bending a single bar into a J shape in plan view, and pressing rotating bodies 371, 371 that are each provided rotatably in a pair on the left and right on the rear side of the left and right pressing arms 370, 370.

[0096] Note that one end of the pressing arm 370 located inside the machine body is pivotally mounted on the rear side of the traveling vehicle body 40 so as to be vertically rotatable. After bending the rear part of the straight part protruding rearward upward, it is bent outward of the machine body, and further bent downward and then bent forward of the machine body at the same vertical position as the straight part inside the machine body. Of the left and right pressing rotators 371, 371, the pressing rotator 371 outside the machine body is provided on the straight part outside the machine body that bends forward of the machine body, and the pressing rotator 371 inside the machine body is mounted on the straight part inside the machine body.

[0097] With the above configuration, an avoidance portion 372 protruding upward from the machine body is formed at the rear part of the pressing arm 370, and the left and right pressing rotators 371, 371 are arranged with a space therebetween. Thereby, the seedlings planted by the planting hoppers 20a, 20b are leveled with the surrounding soil while passing through the space between the left and right pressing rotators 371, 371, and pass under the avoidance portion 372, so that they are not pushed down by the covering and pressing wheels 37, 37, and it is possible to prevent the planting posture from being disturbed.

[0098] Note that the left and right pressing arms 370, 370 are each mounted so that the left and right positions of the machine body can be adjusted, and are configured so that the pressing position can be changed according to the row spacing setting of the planting hoppers 20a, 20b. Further, if the left and right pressing rotators 371, 371 are each configured so that the left and right positions can be adjusted, the soil around the seedlings after planting can be surely compacted, and it is possible to prevent the seedlings from suffering from poor growth due to lodging or low temperature.

[0099] The fields where the traveling vehicle body 40 performs operations are not flat in mountainous areas and the like, and there are also places in an inclined state. The transplanter has heavy objects such as a transmission case 26, a seedling supply device 43, and planting hoppers 20a and 20b mounted on the rear side in the traveling direction. When going uphill, the front side of the machine body is likely to lift up. In order to suppress this, an engine 41 and a transmission case 39 are arranged on the front side of the traveling vehicle body 40, and a work seat 46 on which an operator sits is arranged to balance the weight front and rear. However, depending on the sloping work place, the front side of the machine body may still lift up and assume a front-upward inclined posture. As a result, the seedlings are planted on the ridge surface in a rearward inclined posture, which not only looks bad but may also hinder growth. In particular, as the fuel in the fuel tank is consumed during the progress of the work and the supplementary seedlings loaded on the spare seedling frame 50 decrease, the weight on the front side of the machine body fluctuates, and there is a tendency to easily assume a front-upward inclined posture.

[0100] Also, when seedlings are input from the seedling supply device 43 into the planting hoppers 20a and 20b, the seedlings may not enter the upper openings of the planting hoppers 20a and 20b and may fall onto the field, and there is a risk of missing plants occurring at the positions where planting is originally to be performed. Even if the seedlings enter the planting hoppers 20a and 20b, since they are input closer to the rear side of the machine body inside the planting hoppers 20a and 20b, there is a risk that the planting posture will be more disturbed in combination with the front-rear inclination of the traveling vehicle body 40.

[0101] Furthermore, if the inclination angle becomes too large, the traveling vehicle body 40 may tip over, the loaded seedlings may be scattered on the field, which will cause the trouble of picking them up, and there is a risk that each part of the machine body will be damaged when contacting the field surface during tipping.

[0102] To prevent this, as shown in Fig. 17, left and right excessive tilt sensors 194, 194 that come into contact with the left and right compaction arms 370, 370 when the traveling vehicle body 40 rotates by a predetermined angle or more are respectively provided on the mounting base side of the left and right compaction arms 370, 370. When either the left or right one of the left and right excessive tilt sensors 194, 194 is pushed and enters the detection state, it is determined that the traveling vehicle body 40 is in a posture of tilting forward upward by a predetermined angle (e.g., 5 to 10 degrees) or more, and the engine 41 is stopped, or in the transmission case 39, the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26 is blocked.

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

[0104] This pressing pin 370b extends on both the left and right sides of the actuating piece 370a, and is configured such that even if the left and right compaction arms 370, 370 are moved in the left - right direction of the machine body by changing the row spacing, the pressing pin 370b actuates the excessive tilt sensor 194. That is, when the row spacing is narrowed and the left and right compaction arms 370, 370 are moved inward in the left - right direction of the machine body, the excessive tilt sensor 194 is actuated by the portion extending outside the pressing pin 370b, and when the row spacing is widened and the left and right compaction arms 370, 370 are moved outward in the left - right direction of the machine body, the excessive tilt sensor 194 is actuated by the portion extending inside the pressing pin 370b. Therefore, when changing the row spacing, there is no need to adjust the position of the pressing pin 370b or the position of the excessive tilt sensor 194, and the workability is good.

[0105] The blocking of the transmission of the driving force to the left and right traveling transmission cases 38 and the transmission case 26 is achieved by actuating a traveling transmission actuator that switches the engagement and disengagement of a traveling clutch (not shown) installed inside the transmission case 39, a planting transmission actuator that switches the engagement and disengagement of a planting clutch (not shown), or by actuating a main transmission actuator that switches the engagement and disengagement of a main clutch (not shown) on the upstream side of the transmission compared to the traveling clutch and the planting clutch.

[0106] As a result, when the traveling vehicle body 40 assumes an inclined posture unsuitable for the seedling planting operation, the planting operation travel automatically stops, preventing the seedling planting posture from being disrupted and preventing damage to each part of the machine body due to tipping over.

[0107] The upward inclination of the front of the traveling vehicle body 40 described above poses a problem when it occurs during the planting operation travel. However, during operations where seedlings are not being planted, such as when moving to the field or loading and unloading onto a transport means such as a light truck, since the operator is operating by holding the steering wheel 47 from the rear of the machine body, it does not pose a particular problem and cannot occur in the first place. However, when crossing a step or moving the traveling vehicle body 40 when moving onto the loading platform, it is necessary to incline the traveling vehicle body 40 upward at an inclination angle at which the left and right excessive inclination sensors 194, 194 detect the inclination. At this time, if the engine 41 or the traveling transmission stops, the operator has to manually move the traveling vehicle body 40, which requires extra labor and also requires the engine 41 to be restarted, resulting in problems of further extra labor and fuel consumption.

[0108] To prevent this, a seating detection sensor 195 for detecting the seating of the operator is provided on the work seat 46. When the left and right excessive inclination sensors 194, 194 detect an excessive inclination while the seating detection sensor 195 detects the seating of the operator, the engine 41 or the traveling and planting transmissions stop. When the seating detection sensor 195 does not detect the seating of the operator, even if the left and right excessive inclination sensors 194, 194 detect an excessive inclination, the circuit configuration is such that the engine 41 or the traveling and planting transmissions are not stopped.

[0109] As a result, when the planting operation is not being performed, the traveling vehicle body 40 can continue to be moved by the driving force, improving work efficiency and reducing the labor of the operator.

[0110] Note that the seating detection sensor 195 sets the load considered to be detected to a predetermined weight (e.g., 30 to 40 kg) or more in order to prevent misdetection of the operator's seating due to the weight of the luggage (e.g., an empty box containing seedlings, an information terminal, a water cylinder, or a plastic bottle) loaded by the operator on the aircraft body, and reliably detects that the operator is seated.

[0111] Furthermore, in order to prevent misdetection, it is preferable that the ridge edge sensor 182 has not detected reaching the ridge edge, and that one or both of the left and right excessive inclination sensors 194, 194 are in a detected state. In a place where the vehicle has not passed over the ridge, the sensor arm 183 of the ridge edge sensor 182 rotates downward and is always in a state of detecting the ridge edge. Also, in the forward-upward inclined posture, it is difficult to come into contact even if there are irregularities on the ground, so the engine 41 and the stop of the traveling and planting transmissions due to misdetection are prevented.

[0112] Here, the configuration of the seating detection sensor 195 that detects the seating of the work seat 46 and the operator will be described in detail with reference to FIG. 11.

[0113] In this transplanter, a work seat 46 on which the operator sits is provided so that the operator who replenishes the seedlings to the seedling supply device 43 can board and perform the seedling replenishment work. Specifically, the work seat 46 is arranged backward at the center position of the left and right of the aircraft body on the front side of the seedling supply device 43. The operator sitting on the work seat 46 sits in a backward posture facing the front side of the seedling supply device 43 and performs the seedling replenishment work corresponding to the front side portion of the seedling supply device 43, particularly the front linear portion 28 in the circumferential movement path of the seedling container 22.

[0114] The work seat 46 is mounted on left and right seat mounting frames 501, 501 that are welded and fixed 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 long hole 502 for seat position adjustment at the rear part.

[0116] The elongated hole 502 for seat position adjustment is arc-shaped and lower at the rear, and three position adjustment holding recesses 504 are provided at the lower part.

[0117] In addition, a seating detection sensor 195 is provided on the seat mounting frame 501 so as to face the through hole 505 provided at the center.

[0118] The work seat 46 is provided with a seat support plate 506 at the bottom.

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

[0120] At the front of the seat support plate 506, a front support member 509 made of cushion rubber for supporting the front part of the work seat 46 is provided.

[0121] At a position slightly rearward of the front support member 509 of the seat support plate 506, a pressing member 510 for pressing the seating detection sensor 195 through the through hole 505 of the seat mounting frame 501 is provided.

[0122] The rotation support pin 508 provided on the seat support arm 507 at the rear of the seat support plate 506 is inserted into the elongated hole 502 for seat position adjustment of the seat position adjustment plate 503 provided on the seat mounting frame 501, and is arranged to be adjusted back and forth along the arc-shaped elongated hole 502 for seat position adjustment and engaged with and held by any one of the three position adjustment holding recesses 504.

[0123] Therefore, when the rotation support pin 508 is engaged with the position adjustment holding recess 504 at the most front part, the work seat 46 is at the position adjusted to the most forward position, away from the front linear part 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is appropriate 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.

[0124] Also, when the rotation support pin 508 is engaged with the rearmost position adjustment holding recess 504, the work seat 46 is at the most rearwardly adjusted position and approaches the front straight portion 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is suitable for a short operator to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43. Moreover, since the rotation support pin 508 is engaged and held in the position adjustment holding recess 504 at the rearmost lowest position where the seat position adjustment elongated hole 502 is arcuate and lower toward the rear, the work seat 46 is lowered, and the workability of supplying seedlings to the seedling container 22 is very good for a short operator.

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

[0126] And since the seat position adjustment elongated hole 502 of the seat mounting frame 501 is arcuate, even with an operator sitting on the work seat 46, the rear part of the work seat 46 can be slightly lifted to disengage the rotation support pin 508 from the position adjustment holding recess 504 and easily slide back and forth along the upper arc of the seat position adjustment elongated hole 502, enabling easy adjustment of the forward and backward movement of the work seat 46.

[0127] And in any case where the rotation support pin 508 is engaged with any of the position adjustment holding recesses 504, with the rotation support pin 508 as the rotation center, the backrest side of the front part of the work seat 46 can be rotated rearward of the machine body to change the posture to the storage state at a low position. Therefore, when loading the machine body onto a truck or storing it in a shed or the like, the height of the machine body can be lowered, and the loadability and storability are good. Also, when opening the lid 511 of the fuel tank located below the vicinity of the work seat 46 and supplying fuel to the fuel tank, if the posture is changed to the storage state, the fuel supply work can be easily performed.

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

[0129] Particularly, since the rotation support pin 508 that is the rotation fulcrum of the work seat 46 is at the rear end of the work seat 46, even when the operator sits closer to the rear end of the work seat 46 for the operation of supplying seedlings to the seedling container 22 of the seedling supply device 43, the front side of the work seat 46 is less likely to lift up, and the seating detection sensor 195 can surely detect the seating of the operator.

[0130] Here, when the transplanter 10 travels along the ridge and the operator sits on the work seat 46 with their back facing the traveling direction and performs the seedling transplanting operation, when the transplanter 10 reaches the end of the ridge, the automatic stop at the ridge end that stops the engine 41 to stop the transplanter 10 will be described.

[0131] When the transplanter 10 travels along the ridge and the operator sits on the work seat 46 with their back facing the traveling direction and performs the seedling transplanting operation in a normal state, in the electrical circuit diagram of the engine 41 in FIG. 12, the first engine switch 407, the second engine switch 408, the seating detection sensor 195, the ridge end detection switch 186, and the left and right excessive inclination sensors 194, 194 are all turned ON, and the engine 41 is driving.

[0132] Then, when the transplanter 10 continues to move forward while performing the transplanting operation and reaches the end of the ridge, and the ridge surface contact roller 184 of the ridge end sensor 182 no longer contacts the ridge surface, due to the biasing force of the grounding biasing spring 185 and the self - weight of the sensor arm 183 and the ridge surface contact roller 184, the sensor arm 183 rotates downward, and the ridge end detection switch 186 is not pressed and turns OFF, and the engine 41 stops and the transplanter 10 stops.

[0133] And in particular, since the rotation support pin 508 that serves as the rotation fulcrum of the work seat 46 is located at the rear end of the work seat 46, even when the operator sits near the rear end of the work seat 46 for the operation of supplying seedlings to the seedling container 22 of the seedling supply device 43, the front side of the work seat 46 is less likely to lift up, and the seating detection sensor 195 can reliably detect the seating of the operator. It is possible to prevent a situation where the seating detection sensor 195 turns off, the engine 41 stops, and the transplanter 10 stops while the operator is sitting on the work seat 46 and performing the seedling transplanting operation in a normal state.

[0134] On both the left and right sides of the work seat 46, at a position above the rear wheel axle 12 of the rear wheel 44 when viewed from the side of the machine body, a spare seedling frame 50 capable of accommodating the seedlings to be replenished to the seedling supply device 43 is provided.

[0135] When transplanting seedlings in the field, a so-called irrigation operation of supplying water near the planted seedlings may be performed in consideration of conditions such as the soil quality of the field, the surrounding water environment, or the weather before the operation.

[0136] In this transplanter, water tank holders 601 for loading water tanks 600 are provided on the left and right traveling transmission cases 38, 38 respectively.

[0137] The water for irrigation stored in the water tank 600 is pumped up by the operation of an irrigation pump provided at the bottom of the traveling vehicle body 40 and near the center in the front-rear direction of the machine body, and is discharged to the positions where the planting hoppers 20a, 20b plant the seedlings. The irrigation pump is arranged according to the number of the planting hoppers 20a, 20b, and is arranged on the left and right at intervals with the center of the left and right of the traveling vehicle body 40 as a reference.

[0138] Next, the scraper mechanism 700 for removing the 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 covering and compressing wheel 37 for removing the soil adhering to the outer peripheral surface of the descending and ascending planting hopper 20a (20b).

[0140] Since the scraper 701 is attached to the covering and pressing wheel 37 so as to be rotatable in the vertical direction, there is no need to adjust the scraper 701 accompanying the inter-row adjustment operation.

[0141] As shown in FIGS. 18 and 19, the scraper 701 includes two scraper plates 702 arranged side by side in the left-right direction of the vehicle body, scraper plate arms 703 respectively attached to the two scraper plates 702, a scraper plate arm mounting base 704 to which the two scraper plate arms 703 are rotatably attached in the left-right direction of the vehicle body, and a pulling biasing spring that biases the two scraper plate arms 703 so that the two scraper plates 702 are pulled.

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

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

[0144] That is, the height of the scraper plate arm 703 is not very large, but the posture of the scraper plate arm 703 is a rearward rising inclined posture in which the rear side of the attachment portion of the scraper plate 702 is an acute angle and rises rearward. Therefore, since the scraper plate 702 is rotated in the left-right direction of the vehicle body while being inclined downward, the planting hopper 20a (20b) that has descended while drawing an arc smoothly enters the portion between the two scraper plates 702 in the normal direction of the plate surface.

[0145] Two scraper plates 702 are in contact with the outer peripheral portion of the planting hopper 20a (20b) over a vertically long range, and can surely remove the soil adhering to the outer peripheral surface of the planting hopper 20a (20b), and the planting of seedlings by the planting hopper 20a (20b) is not hindered, and the planting accuracy is ensured. In addition, since the soil adhering to the outer peripheral surface of the planting hopper 20a (20b) is removed, it is possible to prevent the planting hopper 20a (20b) from not entering the soil sufficiently and the planting depth from becoming shallow.

[0146] When the planting hopper 20a (20b) is lifted and separated from the scraper plate 702, the scraper plate arm mounting base 704 is biased upward by the lifting biasing spring, so that the rearwardly inclined posture of the scraper plate arm 703 is realized. Therefore, since the entire scraper 701 rotates upward, the planted seedlings are not knocked down by contact with the scraper 701. And since sufficient time is ensured for the ascending planting hopper 20a (20b) to slide on the scraper plate 702, the soil adhering to the outer peripheral surface of the planting hopper 20a (20b) is more surely removed.

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

[0148] Slits 706 extending outward from the edge are formed in the front and rear central portions of the left and right scraper plates 702, 702.

[0149] Semicircular cutouts 707, 707 are formed in front of and behind the slits 706 of the left and right scraper plates 702, 702. The scraper plates 702 can be flexibly bent along the outer peripheral surface of the planting hopper 20a (20b) that moves down and up. Since the cutouts 707, 707 extend from the side where the left and right scraper plates 702 face each other to the opposite side, the end portions of the scraper plates 702 are deformed along the outer peripheral surface of the planting hopper 20a (20b), and the soil is surely removed.

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

[0151] The left and right scraper plate arms 703, 703 are in an inclined shape that is positioned inwardly rearward so that the rear end portion is located more inwardly than the front end portion.

[0152] Therefore, at the rear portions of the left and right scraper plate arms 703, 703, the lengths by which the left and right scraper plates 702, 702 protrude from the inner sides of the left and right scraper plate arms 703, 703 become shorter. When the planting hopper 20a (20b) exits from the semicircular cutouts 707 behind the left and right scraper plates 702, 702, the range in which the left and right scraper plates 702, 702 can be turned up becomes smaller, the elasticity is stronger, and the soil adhering to the outer peripheral surface of the planting hopper 20a (20b) is surely removed.

[0153] Also, since the left and right scraper plate arms 703, 703 are in an inclined shape that is positioned inwardly rearward so that the rear end portion is located more inwardly than the front end portion, when the planting hopper 20a (20b) moves rearward while ascending from the planting position, the inclined portions serve as guides, and the left and right scraper plate arms 703, 703 open smoothly without being caught.

[0154] In addition, although the stopper piece 375 that restricts the lowering position of the pressing arm 370 of the soil covering and pressing wheel 37 to which the scraper 701 is attached is located outside the scraper 701, the left and right scraper plate arms 703, 703 are shaped in an inclined shape that is inwardly located towards the rear so that the rear end is located more inwardly than the front end. Therefore, interference with the stopper piece 375 can also be prevented.

[0155] The stopper piece 375 is provided with a depression 376 along the outer peripheral surface of the pressing arm 370 on the upper surface of the tip portion that receives the pressing arm 370, suppressing play when receiving the pressing arm 370. Further, the lower surface of the tip portion of the stopper piece 375 is chamfered 376, and even if the tip portion of the stopper piece 375 interferes with the scraper plate arm 703, the scraper plate arm 703 escapes at the chamfer 376.

[0156] As shown in FIG. 20, a slit 710 is provided in the notch portion 707 of the scraper plate 702, and when the outer peripheral surface of the planting hopper 20a (20b) contacts the notch portion 707, the scraper plate 702 deforms to surely remove the soil adhering to the outer peripheral surface of the planting hopper 20a (20b).

[0157] In addition, the scraper plate 702 is formed by welding (or adhering) rubber to cloth, but when assembling to the machine, it is mounted so that the cloth surface is on the bottom and the rubber surface is on the top. Therefore, when the planting hopper 20a (20b) exits from the semi-circular notch portions 707 behind the left and right scraper plates 702, 702, it is difficult for the left and right scraper plates 702, 702 to turn up, and even if they turn up, they return to their original state, surely removing the soil adhering to the outer peripheral surface up to the tip of the planting hopper 20a (20b).

[0158] Further, as shown in Fig. 21, if extension portions 703a extending inward are provided at the rear ends of the left and right scraper plate arms 703, 703 to support the vicinity of the notch 707 behind the scraper plate 702, when the planting hopper 20a (20b) exits from the notches 707 behind the left and right scraper plates 702, 702, the turning up of the left and right scraper plates 702, 702 can be prevented, and the soil adhering to the outer peripheral surface up to the tip of the planting hopper 20a (20b) can be surely removed.

[0159] Based on Figs. 22 and 23, the mounting structure of the soil covering and pressing wheel 37 to the traveling vehicle body 40 will be described.

[0160] A pressing shaft 801 is inserted through a soil covering and pressing wheel mounting frame 800 provided at the rear part of the traveling vehicle body 40, and support pipes 376, 376 provided at the bases of the pressing arms 370, 370 of the left and right soil covering and pressing wheels 37, 37 are rotatably externally fitted to the pressing shaft 801.

[0161] And, a base arm 802 having its base welded and fixed to the soil covering and pressing wheel mounting frame 800 is provided with a mounting hole 803.

[0162] A mounting arm 804 fixed to the pressing arm 370 of one of the soil covering and pressing wheels 37 is provided with a left mounting hole 805 and a right mounting hole 806 with a width L of the inter-row adjustment length opened in the left-right direction.

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

[0164] Then, at this wide gap portion, a washer 810 is brought into contact with the end of the soil covering and pressing wheel mounting frame 800, and a split pin 812 is inserted through a through hole 811 provided in the pressing shaft 801 to stop it. The split pin 812 prevents the pressing shaft 801 from coming out in the left-right direction.

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

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

[0167] And when making narrow row spaces, move the support pipe 376 of one of the soil covering and compressing wheels 37 closer to the soil covering and compressing wheel mounting frame 800, align the mounting hole 803 of the base arm 802 and the left mounting hole 805 of the mounting arm 804, and fix both arms 802, 804 with bolts to narrow the interval between the left and right soil covering and compressing wheels 37, 37.

[0168] <Other Embodiments> (1) FIG. 13 shows another embodiment in which a rotation support pin 508 serving as a rotation fulcrum of the work seat 46 is mounted on the seat mounting frame 501.

[0169] That is, a rotation support pin 508 serving as a rotation fulcrum of the work seat 46 is provided at the rear end of the 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-rear direction is pivotally supported by the rotation support pin 508.

[0170] The slide plate 521 integrally forms a support piece 523 upward at the rear end, inserts the rotation support pin 508 through a through hole 524 provided in the support piece 523, and is rotatably provided at the rear end of the seat support plate 506 with the rotation support pin 508. And the rear end of the work seat 46 and the rear end of the seat support plate 506 are at substantially 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 three position adjustment holding recesses 504 are provided upward in the long hole 520.

[0172] At the rear of the seat mounting frame 501, a positioning pin 525 extending in the left - right direction of the aircraft body is provided at the upper position of the rear end, and a posture - holding pin 526 extending in the left - right direction of the aircraft body is provided at the lower position on the front side of the positioning pin 525.

[0173] The positioning pin 525 and the posture - holding pin 526 are inserted through the long hole 520. When the positioning pin 525 engages with any of the position - adjustment holding recesses 504, the posture - holding pin 526 is configured to be located in the long hole 520 with a narrow upper - lower width outside the position - adjustment holding recess 504.

[0174] Therefore, when the positioning pin 525 is engaged with the position - adjustment holding recess 504 at the rearmost position of the slide plate 521, the work seat 46 is adjusted to the most forward position and is away from the front - side linear portion 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is appropriate 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, since the posture - holding pin 526 is located in the long hole 520 with a narrow upper - lower width outside the position - adjustment holding recess 504, rattling of the work seat 46 can be prevented, and false detection by the seat - occupancy detection sensor 195 can be prevented.

[0175] Also, when the positioning pin 525 is engaged with the position - adjustment holding recess 504 at the foremost position, the work seat 46 is adjusted to the most rearward position and approaches the front - side linear portion 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is appropriate for a short 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, since the posture - holding pin 526 is located in the long hole 520 with a narrow upper - lower width outside the position - adjustment holding recess 504, rattling of the work seat 46 can be prevented, and false detection by the seat - occupancy detection sensor 195 can be prevented.

[0176] Also, when the positioning pin 525 is engaged with the intermediate position adjustment holding recess 504, the work seat 46 is adjusted to an intermediate position in the front-rear direction, and it is appropriate for an operator of standard 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, since the posture holding pin 526 is located in the narrow vertical long hole 520 outside the position adjustment holding recess 504, rattling of the work seat 46 can be prevented, and false detection by the seating detection sensor 195 can be prevented.

[0177] And, no matter which position adjustment holding recess 504 the positioning pin 525 is engaged with to adjust the front-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 it does not get in the way during the seedling transplanting operation and the workability is good. (2) FIGS. 14 and 15 show another embodiment in which the seating detection sensor 195 and a second seating detection sensor 550 provided on the seat frame 500 are provided.

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

[0179] A through hole 551 is formed in the upper part of the vertical seat frame 500a. And 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 operator is sitting on the work seat 46, the mounting frame 500b is in the upper position by the upward biasing force of the compression spring 553, the lower end of the mounting frame 500b is above and away from the second seating detection sensor 550, and the second seating detection sensor 550 is OFF.

[0182] When an operator is seated on the work seat 46, the mounting frame 500b moves downward against the upward biasing force of the compression spring 553 by the weight of the operator, 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 travels along the ridge and the operator is seated on the work seat 46 with their back facing the traveling direction and performing the seedling transplanting work in a normal state, in the electrical circuit diagram of the engine 41 in Fig. 15, the first engine switch 407, the second engine switch 408, the seating detection sensor 195, the second seating detection sensor 550, the ridge end detection switch 186, and the left and right excessive inclination sensors 194, 194 are all ON, and the engine 41 is driving.

[0184] Then, when the transplanter 10 continues to move forward while performing the transplanting work and reaches the end of the ridge, and the ridge surface contact roller 184 of the ridge end sensor 182 no longer contacts the ridge surface, due to the biasing force of the grounding biasing spring 185 and the self - weight of the sensor arm 183 and the ridge surface contact roller 184, the sensor arm 183 rotates downward, and the ridge end detection switch 186 is not pressed and turns OFF, and the engine 41 stops and the transplanter 10 stops.

[0185] Particularly, since the seating detection sensor 195 and the second seating detection sensor 550 are provided 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 seating posture of the operator, since the second seating detection sensor 550 is ON, a situation where the engine 41 stops and the transplanter 10 stops when the operator is seated on the work seat 46 and performing the seedling transplanting work in a normal state will not occur.

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

[0187] That is, a vertical long hole 560 is provided in the seat mounting frame 501, and a second seating detection sensor 550 is provided at the lower position of the long hole 560.

[0188] A seat fixing plate 562 provided with three seat front-back adjustment holes 561 arranged in parallel in the front-back direction is provided on the lower surface of the front part of the seat support plate 506 of the work seat 46.

[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 any one of the long hole 560 of the seat mounting frame 501 and the three seat front-back adjustment holes 561 of the seat fixing plate 562.

[0191] When the rotation support pin 508 is inserted into the long hole 560 of the seat mounting frame 501 and the rearmost seat front-back adjustment hole 561 of the seat fixing plate 562 and rotatably mounted, the work seat 46 is at the most forward adjusted position and is separated from the front straight portion 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is appropriate 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.

[0192] Also, when the rotation support pin 508 is inserted into the long hole 560 of the seat mounting frame 501 and the foremost seat front-back adjustment hole 561 of the seat fixing plate 562 and rotatably mounted, the work seat 46 is at the most rearward adjusted position and is close to the front straight portion 28 in the circumferential movement path of the seedling container 22 of the seedling supply device 43, which is appropriate for a short operator to sit on the work seat 46 and supply seedlings to the seedling container 22 of the seedling supply device 43.

[0193] Also, when the rotation support pin 508 is inserted through the long hole 560 of the seat mounting frame 501 and the seat front-back adjustment hole 561 at the middle in the front-back direction of the seat fixing plate 562 and is rotatably mounted, the work seat 46 is at a position adjusted in the middle in the front-back direction, which is appropriate for an operator of standard 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 operator is sitting on the work seat 46, the work seat 46 is in the upper position by the upward biasing force of the compression spring 563, the rotation support pin 508 is at the upper end position of the long hole 560 of the seat mounting frame 501, the lower side of the seat fixing plate 562 is in the upper position away from the second seating detection sensor 550, and the second seating detection sensor 550 is OFF.

[0195] When an operator is sitting on the work seat 46, the work seat 46 moves downward by the weight of the operator against the upward biasing force of the compression spring 563, the rotation support pin 508 is at the lower end position of the long hole 560 of the seat mounting frame 501, and the second seating detection sensor 550 is pushed by the lower side of the seat fixing plate 562 and turns ON.

[0196] Therefore, similar to the previous item (2), since the seating detection sensor 195 and the second seating detection sensor 550 are provided in parallel as shown in the electrical circuit diagram of the engine 41 in FIG. 15, if either the seating detection sensor 195 or the second seating detection sensor 550 is ON, the seating of the operator can be detected, and thus the seating of the operator can be reliably detected. (4) FIG. 24 shows another embodiment of the water tank holder 601 for loading the water tank 600.

[0197] That is, the upper part of the support fitting 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 fitting 900 with bolts.

[0198] The support fitting 900 is formed with an L-shaped mounting plate 901 in a front view, provided with two mounting holes 902 on the vertical surface, and provided with two mounting holes 903 on the horizontal surface extending outward from the outside of the machine body.

[0199] The water tank holder 601 has a frame structure, with two mounting holes 905 provided on the vertical surface of the U-shaped frame 904 at the front-rear intermediate position and two mounting holes 906 provided on the horizontal surface.

[0200] Align the two mounting holes 902 on the vertical surface of the L-shaped mounting plate 901 of the support fitting 900 with the two mounting holes 905 on the vertical surface of the U-shaped frame 904 of the water tank holder 601 and fix them with bolts. Align the two mounting holes 903 on the horizontal surface of the L-shaped mounting plate 901 of the support fitting 900 with the two mounting holes 906 on the horizontal surface of the U-shaped frame 904 of the water tank holder 601 and fix them with bolts to assemble the water tank holder 601. Note that the water tank holders 601 on the opposite sides in the left-right direction of the machine body are assembled symmetrically in the same way.

[0201] In particular, the mounting position of the water tank holder 601 on the traveling vehicle body 40 is set such that the rear end of the water tank holder 601 is at a position farther forward with respect to the support pipes 376, 376 provided at the bases of the pressing arms 370, 370 of the left and right soil covering and pressing wheels 37, 37 rotatably provided on the pressing shaft 801 inserted and supported by the soil covering and pressing wheel mounting frame 800.

[0202] Therefore, when removing the support pipes 376, 376 provided at the bases of the pressing arms 370, 370 of the left and right soil covering and pressing wheels 37, 37 from the pressing shaft 801 to the left and right outer sides, the water tank holder 601 does not get in the way and the maintenance of the machine body is easy.

Explanation of Signs

[0203] 40 Traveling vehicle body 42 Planting device 46 Operator's seat 195 Occupancy detection sensor 500 Seat frame 501 Seat mounting frame 502 Long hole for seat position adjustment 504 Position adjustment holding recess 506 Seat support member 508 Rotation support pin 510 Pressing member 520 Long Hole 521 Slide Plate 525 Pin 526 Posture Retaining Pin 550 Second Seating Detection Sensor

Claims

1. A transplanter having a traveling device (44) and a planting device (20a, 20b) on a traveling body (40), A compacting device (37) for leveling the soil around the seedlings planted by the planting devices (20a, 20b) is rotatably provided, 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) is provided which stops the traveling device (44) and the planting device (20a, 20b) by contacting the suppressing device (37) when the inclination angle in the front-rear direction of the traveling 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 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 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 operator seating, if the stop member (194) detects an inclination of a predetermined angle or more, the travel device (44) and the planting device (20a, 20b) are stopped, and when the seating detection sensor (195) does not detect the operator seating, the stop member (194) does not stop the travel 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 at the lower part of the seat support arm (507), a pivot support pin (508) is provided for rotation in the left-right direction of the aircraft body. 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 slightly rearward of the front support member (509) of the seat support plate (506) for pressing the seating detection sensor (195) through a through hole (505) of the seat mounting frame (501).

Images