JP5668723B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter for planting seedlings of crops such as paddy rice in a field.

  When planting work while reciprocating the field with a seedling transplanter, when the traveling vehicle body reaches the end of the field, it turns while operating the planting device. In some cases, the planting device is automatically operated in accordance with the turning travel without an operator performing an operation during the turning travel.

  For example, the seedling transplanter described in Patent Document 1 includes a lever switching motor that switches a state of a planting lift lever that is operated when setting up and down of the planting device and planting, depending on the state of planting work. When the motor is activated, the state of the planting device can be switched. For this reason, when a predetermined state is reached during turning at the time of planting, the lever switching motor is operated to switch the planting lift lever to lower the planting device. By actuating and switching the planting lift lever, the planting device is driven. Thereby, the planting operation at the time of turning can be automated, and the operability at the time of turning can be improved.

JP2012-5385A

  Here, when the operation of the planting device according to the turning state is automatically performed, the operation timing may be deviated from the timing desired by the operator depending on the turning state, the state of the field, or the like. However, when the planting lift lever is switched by a motor as in Patent Document 1, even if an operator attempts to operate the lever to correct the operation timing of the planting device during turning, the driving force of the motor is not controlled by the operator. It may exceed your power. In this case, since the operation timing cannot be corrected, there may be a section where the seedling is not planted, or the planting of the seedling may be performed near the end of the field. .

  On the other hand, at the time of switching the planting lift lever by the driving force of the motor, when the operator corrects the work timing, when the operator operates the planting lift lever with a force exceeding the driving force of the motor, the correction operation is performed. In this case, however, the motor is overloaded, and the linkage mechanism with the motor and the planting lift lever may be damaged. As described above, it is very difficult to correct the operation of the planting device at the timing desired by the operator when the operation of the planting device is linked to the turning travel.

  This invention is made | formed in view of the above, Comprising: It aims at providing the seedling transplanting machine which can correct | amend the timing of planting of the seedling planting operation | movement interlocked with turning driving | running | working easily.

In order to solve the above-described problems and achieve the object, the seedling transplanting machine according to the present invention is provided with a seedling planting part (40) on the traveling vehicle body (2) so as to be movable up and down, and the seedling planting part (40). And a turning interlocking actuator (110) for forcibly operating the planting operation member (36), and a traveling vehicle body (2). A control device (200) for operating the turning interlocking actuator (110) in conjunction with the turning and turning of the seedling planting part (40) to perform turning interlocking control in conjunction with the turning vehicle, A seedling planting part raising mechanism (50) for bringing the seedling planting part (40) into an inoperative state and raising it in conjunction with the turning operation of (2) is provided, and the wheels (5) of the traveling vehicle body (2) are provided. movement detecting member for detecting a rotational speed (171, 172) is provided, said system Device (200), based on the rotational speed of the wheel (5) for detecting of the movement detection member (171, 172) is lowered the seedling planting unit (40), the seedling planting unit (40) When the movement detection member (171, 172) does not detect the set rotation speed within a predetermined time after the descent, or when the movement detection member (171, 172) detects the set rotation speed, the seedling planting part (40) Then, the turning interlock actuator (110) is driven in the reverse direction to manually move the planting operation member (36), which has been switched to the “down” or “planting” position, to the “up” position. It is characterized in that it can be switched freely.

Further, the invention according to claim 2 is the seedling transplanter according to claim 1, wherein the left and right wheels (5, 5) are provided as a pair of left and right wheels, and the left and right wheels (5, 5) detect the rotational speed. The movement detection member (171, 172) is provided, and the control device (200) detects the left and right movement detection members (171, 172) detected by the left and right movement detection members (171, 172) when the seedling planting part (40) starts to rise. By comparing the rotational speeds of the wheels (5, 5) to determine the turning direction of the traveling vehicle body (2), if the magnitude relationship between the rotational speeds of the left and right wheels (5, 5) is reversed during the turning, the turning interlock The actuator (110) is driven in the reverse direction, and the planting operation member (36) that has been switched to the “down” or “planting” position can be manually switched to the “up” position. .

Further, the invention according to claim 3 is the seedling transplanting machine according to claim 1 or 2 , wherein a pair of left and right wheels (5, 5) is provided, and the number of rotations of the left and right wheels (5, 5) is detected. Left and right movement detection members (171, 172) are provided, and left and right rear wheel gear cases (23, 24) for transmitting driving force to the left and right wheels (5, 5) are provided at the rear of the traveling vehicle body (2). The left and right rear wheel gear cases (23, 24) are provided with the left and right movement detecting members (171, 172), and the leveling rotor (160) for leveling the field is provided at the lower front side of the seedling planting part (40). An output part (25) for outputting a driving force to the leveling rotor (160) is provided above the input shaft on either side of the left and right rear wheel gear cases (23, 24), and the output part (25) is provided. The movement detection member (171) on the provided side is inserted into the rear wheel gear case (23). The movement detection member (172) opposite to the side provided with the output portion (25) is provided directly above the input shaft of the rear wheel gear case (24). It is characterized in that it is provided in a directly downward posture toward the input shaft .

According to a fourth aspect of the present invention, in the seedling transplanting machine according to any one of the first to third aspects, a traveling operation member (35) for switching the forward / backward movement of the traveling vehicle body (2) is provided. The reverse operation member (201) for detecting the reverse operation of the travel operation member (35) is provided, and the control device (200) is configured so that the seedling planting unit (40) is lowered after the seedling planting unit (40) is lowered. When a reverse operation of the traveling operation member (35) is detected before the operation of the traveling operation member (35), the turning interlocking actuator (110) is driven in the reverse direction, and the planting operation is switched to the “down” or “planting” position. The member (36) can be manually switched to the “up” position .

According to a fifth aspect of the present invention, in the seedling transplanting machine according to the first to fourth aspects, a maneuvering part (30) disposed on the traveling vehicle body (2) is provided, and the maneuvering part (30) An operation panel (181) disposed at the rear upper portion, a handle post (180) of a handle (32) disposed at the center of the operation panel (181) and for turning the traveling vehicle body (2) , A swing interlocking operation member (185) which is disposed at the rear lower part of the handle post (180) and which switches between the operation and non-operation of the swing interlocking control, and is disposed on the left and right of the handle post (180). A display unit (182) for displaying the operating state of the above is provided .

Further, the invention according to claim 6 is the seedling transplanter according to any one of claims 1 to 5 , further comprising a turning interlocking operation member (185) for switching between operation and non-operation of turning interlock control, There is provided a sub-transmission operation member (230) that switches between a moving state in which the traveling speed of the traveling vehicle body (2) travels at a high speed on the road, a planting state in which the traveling speed is low in the field, and a neutral state in which traveling stops. A movement state detection member (250) for detecting that the operation member (230) has been operated to a movement state is provided, and the control device (200) performs turning interlock control when the movement state detection member (250) is in a detection state. It is characterized by switching to a non-operating state .

Further, the invention according to claim 7 is the seedling transplanting machine according to claim 6 , wherein the seedling transplanting portion (30) is provided on a side of the turning interlocking operation member (185). The planting switching member (186) for switching the operation timing of the planting step (40) stepwise is provided, and the lowering switching member (205) for switching the lowering timing of the seedling planting unit (40) is provided inside the control unit (30). Is provided .

The seedling transplanting machine according to claim 1 is capable of lowering or stopping the seedling planting when the seedling planting part (40) needs to be lowered or stopped during the turning interlock control. Correction of the descent | fall of an attaching part (40) or an operation | movement timing becomes easy, and the planting precision of a seedling improves. In addition, when the movement detection member (171, 172) does not detect the set rotational speed of the wheel (5) within a predetermined time in a state where the seedling planting part (40) is lowered by the turning interlock control, or the movement detection member ( 171, 172) detects the set rotational speed of the wheel (5) and activates the seedling planting part (40), then drives the swivel interlocking actuator (110) in the reverse direction to “down” or “ Since the planting operation member (36) switched to the “planting” position can be manually switched to the “up” position, the traveling vehicle body (2) is stopped on the spot or due to some problem. When the movement is delayed, the operator can operate the seedling planting part (40) at an arbitrary timing, so that the planting start position of the seedling can be adjusted with higher accuracy.

In addition to the effect of the invention of claim 1, the seedling transplanting machine according to claim 2 can automatically cancel the turning interlocking control when the turning operation is mistaken. ) Starts to descend earlier than the planned planting start position, and the seedling planting part (40) is prevented from operating in front of the planned planting start position. It can be adjusted to the planting end position, and seedling planting accuracy is improved.

In addition to the effect of the invention of claim 1 or 2 , the seedling transplanting machine according to claim 3 is provided with a movement detection member on the side provided with an output portion (25) for outputting a driving force to the leveling rotor (160). Provided in an obliquely downward posture toward the input shaft diagonally above the input shaft of the rear wheel gear case, and the movement detection member on the side opposite to the side where the output portion (25) is provided is directly above the input shaft of the rear wheel gear case. By providing in a directly downward posture toward the left, it is possible to reliably detect the rotation of the left and right wheels (5, 5).

In addition to the effect of any one of claims 1 to 3 , the seedling transplanting machine according to claim 4 is a traveling operation member before being actuated after the seedling planting portion (40) is lowered by the turning interlock control. (35) When the reverse movement detection member (201) detects the reverse operation, the planting operation member (36) can be operated by manual operation. Even in a situation where the attaching part (40) does not operate, when the traveling vehicle body (2) is moved backward and the planting operation member (36) is manually operated, the seedling planting part (40) can be operated at an arbitrary position. Therefore, the planting start position of the seedling can be matched with the planting end position of the adjacent strip, and the seedling planting accuracy is improved.

In addition to the effects of any one of claims 1 to 4, the seedling transplanting machine according to claim 5 is provided with a pivot interlocking operation member (185) at the lower rear portion of the handle post (180). It is possible to prevent the hand or the like from touching the turning interlocking operation member (185) during the operation of (32) and to prevent the work from continuing without the operator noticing that the turning interlocking control has been released. Thus, the operability of the turning operation is improved. Moreover, by providing the display part (182) provided in the control part (30) on the left and right of the handle post (180), the operator can visually recognize the display part (182) from the space part of the handle (32). This makes it easier for the operator to notice the occurrence of an abnormality and prevents the occurrence of extra work due to the continued abnormality.

In addition to the effects of any one of the first to fifth aspects, the seedling transplanting machine according to claim 6 includes a movement state detection member (250) indicating that the auxiliary transmission operation member (230) has been moved to the movement state. Is detected, it is possible to prevent the turn interlock control from being erroneously performed during road traveling by switching the turn interlock control to the non-operating state, and thus stable road travel is possible.

In addition to the effect of the invention described in claim 6 , the seedling transplanting machine according to claim 7 speeds up the operation timing of the seedling planting part (4) by operating the planting switching member (186). The planting start timing can be changed according to the turning distance of the traveling vehicle body (2) and the number of strips at the end of the field. The work of planting can be eliminated. As a result, the labor of the operator can be reduced and the planting position of the seedling can be prevented from overlapping when the seedling is planted at the end of the field in the last step, thereby suppressing the consumption of excess seedlings. can do.
Further, by operating the lowering switching member (205), the lowering timing of the seedling planting part (40) can be made faster or slower, and the turning distance of the traveling vehicle body (2) and the field edge work can be reduced. Since the descending timing of the seedling planting part (40) can be changed according to the number of strips, the descending timing and the operation timing of the seedling planting part (40) can be adjusted according to the working conditions and the field conditions. As a result, seedlings can be planted at an appropriate timing, and work efficiency and seedling planting accuracy can be improved.

FIG. 1 is a side view of a seedling transplanter according to an embodiment. FIG. 2 is a plan view of the seedling transplanter according to the embodiment. FIG. 3 is a plan view of the steering arm. 4 is a view taken in the direction of arrows BB in FIG. FIG. 5 is a view taken along the line B-B in FIG. 3 and is an explanatory diagram when a spring cover is provided. FIG. 6 is a perspective view showing the vicinity of the switching cam. FIG. 7 is a front view of the switching cam. FIG. 8 is an explanatory diagram showing the relationship between the planting lift lever and the switching cam. 9 is a cross-sectional view taken along the line CC of FIG. FIG. 10 is a main part configuration diagram of the seedling transplanter shown in FIG. FIG. 11 is a top view of the control section shown in FIG. FIG. 12 is an explanatory diagram when the switching cam is rotated by the cam motor. FIG. 13 is an explanatory diagram when the switching cam is rotated by the cam motor. FIG. 14 is an explanatory diagram when the switching cam is rotated by the cam motor. FIG. 15 is an explanatory diagram of the position of the planting lift lever. FIG. 16 is an explanatory diagram of the position of the planting lift lever. FIG. 17 is an explanatory diagram of the position of the planting lift lever. FIG. 18 is an explanatory diagram of the position of the planting lift lever. FIG. 19 is an explanatory diagram when the shift lever is switched to reverse. FIG. 20 is a main part schematic diagram illustrating a modification of the seedling transplanter according to the embodiment. FIG. 21 is a view taken in the direction of arrows EE in FIG. FIG. 22 is a view taken along the line FF in FIG.

  Hereinafter, an embodiment of a seedling transplanting machine according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

Embodiment
FIG. 1 is a side view of a seedling transplanter according to an embodiment. FIG. 2 is a plan view of the seedling transplanter according to the embodiment. In the following description, the front / rear / left / right direction reference defines the front / rear, left / right reference with respect to the traveling direction of the vehicle body as viewed from the cockpit. A traveling vehicle body 2 of the seedling transplanter 1 shown in the figure has a pair of left and right front wheels 4 and a pair of left and right rear wheels 5 as well, and is a four-wheel drive vehicle in which each wheel is driven during traveling. In addition, a seedling planting section 40 that can be moved up and down by a seedling planting section lifting mechanism 50 is provided at the rear of the traveling vehicle body 2.

  The traveling vehicle body 2 includes a main frame 7 disposed substantially at the center of the vehicle body, an engine 10 mounted on the main frame 7, and power for transmitting the power of the engine 10 to the drive wheels and the seedling planting unit 40. And a transmission device 15. That is, in this seedling transplanter 1 according to the present embodiment, the power of the engine 10 is used not only to drive the traveling vehicle body 2 forward or backward, but also to drive the seedling planting unit 40, and diesel A heat engine such as an engine or a gasoline engine is used.

  Further, the engine 10 is arranged at a substantially center in the left-right direction of the traveling vehicle body 2 and in a state of protruding upward from a floor step 26 on which an operator puts his / her foot when getting on. Further, the floor step 26 is provided between the front part of the traveling vehicle body 2 and the rear part of the engine 10, and is mounted on the main frame 7, and a part of the floor step 26 becomes a lattice shape. The mud on the shoes can be dropped on the field. A rear step 27 that also serves as a fender for the rear wheel 5 is provided behind the floor step 26. The rear step 27 has an inclined surface that is inclined upward as it goes rearward, and is disposed on each of the left and right sides of the engine 10.

  The engine 10 protrudes upward from the floor step 26 and the rear step 27, and an engine cover 11 that covers the engine 10 is disposed in a portion protruding from these steps. That is, the engine cover 11 covers the engine 10 in a state of protruding upward from the floor step 26 and the rear step 27.

  Further, the traveling vehicle body 2 is provided with a cockpit 28 above the engine cover 11, and a steering unit 30 is disposed in front of the cockpit 28 and at the front center of the traveling vehicle body 2. Yes. The control unit 30 is arranged in a state of protruding upward from the floor surface of the floor step 26 and divides the front side of the floor step 26 into left and right.

  Various operating devices, a fuel tank for engine fuel, and the like are disposed inside the control unit 30, and a front cover 31 that can be opened and closed is provided at the front of the control unit 30. In addition, an operation lever and the like for operating the operation device, instruments, and a handle 32 are disposed on the upper portion of the control unit 30. The handle 32 is provided as a steering member that steers the traveling vehicle body 2 by an operator steering the front wheel 4, and can steer the front wheel 4 via an operation device or the like in the control unit 30. It has become. In addition, as the lever, the operating state of the speed change lever 35 that is a traveling operation member for operating the traveling vehicle body 2 to move forward and backward and the traveling speed, and the seedling planting part 40 are at least raised by the seedling planting part lifting mechanism 50. A planting lifting / lowering lever 36 that is a planting operation member that can be switched by including is disposed. Specifically, the planting lifting / lowering lever 36 can switch the raising / lowering state of the seedling planting unit 40.

  In addition, a spare seedling stage 130 on which replenishment seedlings are placed is disposed at portions of the floor step 26 located on the left and right sides of the control unit 30. The preliminary seedling stage 130 is rotatably supported by a support shaft (vertical shaft) protruding from the floor surface of the floor step 26, and can be rotated by an operator's hand.

  The power transmission device 15 includes a hydraulic continuously variable transmission 16 as a main transmission, and a belt-type power transmission mechanism 17 that transmits power from the engine 10 to the hydraulic continuously variable transmission 16. Yes. Among these, the hydraulic continuously variable transmission 16 is configured as a hydrostatic continuously variable transmission called HST (Hydro Static Transmission). For this reason, the hydraulic continuously variable transmission 16 generates hydraulic pressure by a hydraulic pump that is driven by power from the engine 10, and converts this hydraulic pressure into mechanical force (rotational force) by a hydraulic motor and outputs it.

  The hydraulic continuously variable transmission 16 is disposed in front of the engine 10 and below the floor surface of the floor step 26. In the seedling transplanter 1 according to the present embodiment, the upper surface of the traveling vehicle body 2 is disposed. As viewed from the front side of the engine 10.

  The belt-type power transmission mechanism 17 includes a pulley attached to the output shaft of the engine 10, a pulley attached to the input shaft of the hydraulic continuously variable transmission 16, a belt wound around both pulleys, A tension pulley for adjusting the tension of the belt. As a result, the belt-type power transmission mechanism 17 can transmit the power generated by the engine 10 to the hydraulic continuously variable transmission 16 via the belt.

  Furthermore, the power transmission device 15 has a transmission case 18 in which the output from the engine 10 is transmitted via the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16. The mission case 18 is attached to the front portion of the main frame 7. The transmission case 18 shifts the output from the engine 10 transmitted via the belt-type power transmission mechanism 17 and the hydraulic continuously variable transmission 16 by the auxiliary transmission in the transmission case 18, and The power can be output separately for the driving power to the rear wheel 5 and the driving power to the seedling planting section 40.

  Among these, a part of the driving power can be transmitted to the front wheel 4 via the left and right front wheel final cases 21, and the rest can be transmitted to the rear wheel 5 via the left and right rear wheel gear cases 22. Yes. The left and right front wheel final cases 21 are disposed on the left and right sides of the mission case 18, respectively. The left and right front wheels 4 are connected to the left and right front wheel final cases 21 via axles. Further, the front wheel final case 21 is driven in accordance with the steering operation of the handle 32 and can steer the front wheel 4. Similarly, the rear wheels 5 are connected to the left and right rear wheel gear cases 22 via axles. On the other hand, the driving power is transmitted to a planting clutch (not shown) provided at the rear part of the traveling vehicle body 2, and is transmitted to the seedling planting unit 40 by a planting transmission shaft (not shown) when the planting clutch is engaged. Is done.

  Further, the seedling planting part lifting mechanism 50 that raises and lowers the seedling planting part 40 provided at the rear part of the traveling vehicle body 2 has a lifting link device 51, and the seedling planting unit 40 uses the lifting link device 51. It is attached to the traveling vehicle body 2 via. The lifting link device 51 includes a parallel link mechanism 52 that connects the rear portion of the traveling vehicle body 2 and the seedling planting portion 40. The parallel link mechanism 52 has an upper link and a lower link, and these links are rotatably connected to a link base frame 53 in the rear viewing direction standing at the rear end of the main frame 7. The other end side of each link is rotatably connected to the seedling planting part 40, so that the seedling planting part 40 is connected to the traveling vehicle body 2 so as to be movable up and down.

  The seedling planting part lifting mechanism 50 includes a hydraulic lifting cylinder 54 that expands and contracts by hydraulic pressure, and the seedling planting part 40 can be lifted and lowered by the expansion and contraction operation of the hydraulic lifting cylinder 54. The seedling planting part lifting mechanism 50 can raise the seedling planting part 40 to the non-working position or lower it to the ground work position (ground planting position) by its lifting and lowering operation.

  In addition, the seedling planting unit 40 can plant a range in which a seedling is planted in a plurality of sections or a plurality of rows. In the seedling transplanting machine 1 according to the present embodiment, the seedling is planted in four sections. The seedling planting section 40 is provided. The seedling planting unit 40 includes a planting device 41, a seedling placing unit 45, and a float 47. Among these, the seedling placement part 45 has seedling placement surfaces 46 corresponding to the number of planting strips partitioned in the left-right direction of the traveling vehicle body 2, and a soiled mat-like seedling is placed on each seedling placement surface 46. It is possible to place. This eliminates the need to return the seedlings prepared outside the field every time the seedlings placed on the seedling placement part 45 are planted, and the continuous work can be performed, so that the work efficiency is improved.

  The planting device 41 is a device for planting the seedling placed on the seedling placement unit 45 in the field. This planting device 41 is arranged for every two strips, and includes two planting claws 42. In addition, the float 47 slides on the farm scene along with the movement of the traveling vehicle body 2 to level the ground, and includes a center float 48 positioned at the center of the seedling planting portion 40 in the lateral direction of the traveling vehicle body 2, and the lateral direction. Side floats 49 located on both sides of the seedling planting part 40 in FIG.

  Further, a leveling rotor 160 for leveling the field is provided on the front side of the lower position of the seedling planting unit 40. The leveling rotor 160 is configured to be rotatable by the output from the engine 10 transmitted through the rear wheel gear case 22.

  In addition, on both the left and right sides of the seedling planting portion 40, a drawing marker 165 that forms a line that serves as a guide in the traveling direction on the next planting line is provided. That is, the line drawing marker 165 draws a mark on the field when the seedling transplanter 1 moves straight forward in the field and then moves straight forward on the field. The drawing marker 165 is operated by a marker motor 166 (see FIG. 10), and is configured so that the left and right drawing markers 165 can be switched each time the traveling vehicle body 2 turns. The left and right drawing markers 165 are replaced by the controller 200 (see FIG. 10) to which the marker motor 166 is connected. That is, the controller 200 is also provided as a marker switching device that alternately switches the left and right drawing markers 165 between the activated state and the deactivated state when the traveling vehicle body 2 turns.

  In addition, a fertilizer application 150 is mounted behind the cockpit 28 in the traveling vehicle body 2. The fertilizer application device 150 includes a fertilizer tank 151 that stores fertilizer, a fertilizer feeding unit 152 that feeds the fertilizer in the fertilizer tank 151 downward by a fixed amount, and a fertilizer that has been fed to the seedling planting unit 40 side by a fertilizer hose 154. And a blower 153 to be transferred. Further, the fertilizer application device 150 is disposed below the seedling planting unit 40, and is provided on the front side of the fertilizer guide 155, the fertilizer being transferred by the fertilizer hose 154, and is transferred by the fertilizer hose 154. And a grooving device 156 for dropping the fertilizer into a fertilization groove formed near the side of the seedling planting strip.

  FIG. 3 is a plan view of the steering arm. 4 is a view taken in the direction of arrows BB in FIG. In the traveling vehicle body 2, a steering arm 60 that rotates the front wheel 4 in response to the steering of the handle 32 is disposed on the front bottom side of the traveling vehicle body 2. That is, the steering arm 60 rotates when the steering shaft 33 connected to the steering arm 60 is rotated by rotating torque transmitted through the pinion mechanism or the power steering mechanism when the handle 32 rotates. With the rotation of 33, the steering arm 60 also rotates. As described above, when the steering wheel 32 is steered, the steering arm 60 rotates about the steering shaft 33 as a rotation fulcrum, and the steering arm 60 becomes a turning interlocking arm that rotates by steering the steering wheel 32. ing.

  Tie rod coupling portions 61 to which tie rods (not shown) are coupled are formed at both ends of the steering arm 60 in the left-right direction. The two tie rods connected to the tie rod connecting portion 61 are connected to knuckle arms (not shown) attached to the left and right front wheel final cases 21 so that the movement of the steering arm 60 can be transmitted to the knuckle arms. It has become. Thus, the left and right front wheels 4 can be steered by steering the handle 32.

  Further, the steering arm 60 has a rotation transmitting portion 65 extending forward near the center in the left-right direction, and the tip of the rotation transmitting portion 65, that is, the steering shaft 33 in the rotation transmitting portion 65 is provided. A mounting pin 66 is disposed in the vicinity of the end on the side opposite to the position where the pin is located. The mounting pin 66 is positioned at the center of the traveling vehicle body 2 in the left-right direction of the vehicle body when the handle 32 is in the straight traveling position.

  In front of the steering arm 60, an autolift operating arm 70, which is an operating arm that can operate the seedling raising / lowering mechanism 50 in conjunction with the rotation of the steering arm 60, is disposed. That is, the seedling transplanting machine 1 according to the present embodiment is capable of pivoting interlock control that operates the seedling planting part lifting mechanism 50 and the like in conjunction with the pivoting operation of the handle 32. It is a member used in this turning interlock control.

  The autolift operating arm 70 is connected to a mounting pin 66 of the steering arm 60 by a connecting spring 75. The connecting spring 75 has elasticity and connects the steering arm 60 and the autolift operating arm 70 to rotate the steering arm 60 in a state where both distances can be changed. It is used as an elastic member that transmits to Further, two connecting springs 75 are used, and the two connecting springs 75 connect the mounting pin 66 and the autolift operating arm 70 on the upper surface side and the lower surface side of the steering arm 60. Yes.

  As described above, the attachment pin 66 is provided on the steering arm 60 as an attachment member to which the connection spring 75 is attached, and is disposed on the front side of the rotation fulcrum of the steering arm 60. Further, the connecting portion of the autolift operating arm 70 with the connecting spring 75 is located on the rear side of the front frame 8 that is the front frame of the traveling vehicle body 2. For this reason, the connecting spring 75 connects the steering arm 60 and the autolift operating arm 70 on the rear side of the front frame 8.

  The autolift operating arm 70 includes an upward spring-side connecting portion 71, one end connected to the spring-side connecting portion 71, a rotating shaft 72 that extends horizontally and the other in the rotating shaft 72. And a cable-side connecting portion 73 that is connected to the end side and extends upward from the connecting portion. Further, an arm cable 77 is rotatably connected to the upper end portion of the cable side connecting portion 73 by a connecting member 78. The autolift operating arm 70 configured as described above can rotate integrally around the rotation shaft 72, so that the spring side connecting portion 71 and the cable side connecting portion 73 can rotate. It rotates in a direction around the moving shaft 72.

  Of these, the connection spring 75 is connected to the spring side connection portion 71, and both are connected in a state where the distance between the steering arm 60 and the spring side connection portion 71 can be changed. It should be noted that the connecting spring 75 that connects the steering arm 60 and the autolift operating arm 70 in this way has a relative positional relationship and a connection spring 75 so that it has a free length when the handle 32 is in the straight movement position. The characteristic is set.

  When two connection springs 75 are provided in the vertical direction, a spring cover 75a that covers the outer periphery of the upper connection spring 75 may be provided as shown in FIG. As a result, the upper and lower connecting springs 75, 75 that have been extended during the turning operation are engaged with each other when they are contracted at the end of the turning operation and do not sufficiently contract, or the extension amount that does not match the operation amount of the handle 32 during the next turning operation. Therefore, it is possible to prevent the timing of the raising of the seedling planting unit 40 from being delayed, and to prevent the seedling planting unit 40 from pushing down the seedling.

  FIG. 6 is a perspective view showing the vicinity of the switching cam. FIG. 7 is a front view of the switching cam. The other end side of the arm cable 77 connected to the autolift operating arm 70 is an autolift arm 90 that constitutes an autolift mechanism that is a mechanism for automatically raising the seedling planting portion 40 in accordance with the steering of the handle 32. It is connected to the. That is, the arm cable 77 is provided as an arm connecting member that connects the autolift arm 90 and the autolift operating arm 70 and transmits the operation of the autolift operating arm 70 to the autolift arm 90. The auto lift mechanism includes a switching cam 80, a back lift arm 95, a back lift on / off lever 96, and a positioning roller 105.

  Explaining each of these members, the switching cam 80 is formed of a plate-like member, and a positioning hole 81 that is a horizontally long hole is formed near the center, and an upper end edge of the positioning hole 81 is formed. Are formed with four positioning portions 82 that are formed in an arc shape protruding upward. That is, at the upper end edge of the positioning hole 81, the raised position 83 as the first position, the stop position 84 as the second position, the lowered position 85 as the third position, and the planting position 86 as the fourth position. The four positioning portions 82 are formed. The positioning roller 105 has a tip portion inserted into the positioning hole 81. In addition, since the upward biasing force is always applied to the positioning roller 105 by a spring (not shown), the positioning roller 105 is in a state where it is fitted about half of the four positioning portions 82.

  The back lift arm 95 is located on the side of the switching cam 80 where the positioning roller 105 is inserted, i.e., the side where the positioning roller 105 is located. Further, the back lift arm 95 is located on the side where the switching cam 80 is located. On the opposite side, a backlift on / off lever 96 is located. Among these, the autolift arm 90 is disposed between the switching cam 80 and the backlift arm 95.

  One end of the autolift arm 90 and the backlift arm 95 is rotatably connected by a common support shaft 100. In addition, a cable connecting portion 91 is located at the end of the autolift arm 90 opposite to the end connected to the support shaft 100, and the arm cable 77 is connected to the cable connecting portion 91. Has been.

  Further, the backlift arm 95 is provided with a lock pin 101 protruding in the direction of the autolift arm 90. On the other hand, the autolift arm 90 has a hole (not shown) through which the lock pin 101 enters, and the lock pin 101 normally enters the hole of the autolift arm 90. Further, the backlift arm 95 is connected to the positioning roller 105. Therefore, in a state where the lock pin 101 enters the hole of the auto lift arm 90, the auto lift arm 90, the back lift arm 95, and the positioning roller 105 can move together. Further, the auto lift arm 90 is movable in the axial direction of the support shaft 100 and the positioning roller 105, and thus can be arbitrarily detached from the lock pin 101.

  According to the above configuration, the back lift that automatically raises the seedling planting part 40 when the shift lever 35 is operated backward, and the auto lift that automatically raises the seedling planting part 40 when the handle 32 is turned are not activated. Therefore, the operator can perform operations such as raising and lowering the seedling planting unit 40 at an arbitrary timing. In this setting, the operation at the time of turning especially increases and the operability is lowered, but the planting position is set under the condition that the planting position cannot be adjusted by automatically raising and lowering the seedling planting unit 40. Since it can arrange, seedling planting accuracy improves. Further, by removing the autolift arm 90 from the lock pin 101, the backlift and the autolift are not physically operated. Therefore, the backlift and the autolift are activated by the malfunction of the control device as in the electronic control. Can be prevented.

  The backlift on / off lever 96 is connected to the positioning roller 105 so as to be rotatable. Further, the backlift on / off lever 96 has a vertically long portion and a horizontally long portion, so that a notch hole 97 formed in an inverted L shape is formed. In this cutout hole 97, the tip of a bar 107 extending in the same direction as the support shaft 100 is inserted. As will be described later, the bar 107 is configured to descend when the speed change lever 35 is set to reverse.

  For this reason, when the shift lever 35 is set to reverse, and the bar 107 is positioned in the horizontally long portion of the notch hole 97, the back lift on / off lever 96 is moved by moving the bar 107 downward. Is pushed by the bar 107 and moves downward. In this case, the positioning roller 105 connected to the backlift on / off lever 96 also moves downward. On the other hand, when the bar 107 is positioned in the vertically long portion of the cutout hole 97, the bar 107 only moves in the cutout hole 97 even if the bar 107 moves downward. For this reason, the pressing force from the bar 107 to the backlift on / off lever 96 does not work, so the positioning roller 105 does not move downward.

  Further, since the back lift on / off lever 96 is rotatably connected to the positioning roller 105, the operator manually rotates the back lift on / off lever 96 so that the bar 107 with respect to the notch hole 97 is By appropriately determining the position, when the shift lever 35 is moved backward, a mode in which the backlift on / off lever 96 and the positioning roller 105 are automatically pushed down and a mode in which the backlift is not pushed down can be arbitrarily selected. ing.

  FIG. 8 is an explanatory diagram showing the relationship between the planting lift lever and the switching cam. The planting elevating lever 36 has a lower end connected to a switching cam 80 via a bracket 37 and a connecting shaft 38. That is, the planting lift lever 36 and the switching cam 80 are connected by fitting the connecting shaft 38 into a connecting hole 87 formed near the upper end of the switching cam 80. Thereby, the switching cam 80 rotates with the planting lift lever 36 around the connecting shaft 38 when the planting lift lever 36 is operated. Further, the switching cam 80 is constantly applied with a biasing force in the direction of the cable connecting portion 91 side (direction of arrow F in FIG. 6) in the autolift arm 90 by a spring (not shown).

  In addition, the planting lift lever 36 can switch between a plurality of operating states of the seedling planting unit 40, and specifically switches between the "up", "stop", "down", and "planting" modes. It can be set. These modes set by operating the planting lift lever 36 correspond to the rising position 83, the stop position 84, the lowering position 85, and the planting position 86 of the switching cam 80, respectively.

  That is, the positioning roller 105 is normally fitted in one of the four positioning portions 82. However, when the operator sets the planting lift lever 36 to the “up” position, the connecting shaft 38 The switching cam 80 that rotates together with the planting lift lever 36 about the center rotates in the direction of the planting position 86. As a result, the positioning roller 105 moves relative to the positioning hole 81 and fits in the raised position 83 of the positioning portion 82. Similarly, when the planting lift lever 36 is set to the “stop” position, the positioning roller 105 is placed in the stop position 84 of the positioning portion 82, and the planting lift lever 36 is set to the “down” position. In this case, the positioning roller 105 is placed in the lowered position 85 of the positioning portion 82, and when the planting lift lever 36 is set to the “planting” position, the positioning roller 105 is moved to the planting position 86 of the positioning portion 82. It will fit.

  A switching cam 80 that rotates about the connecting shaft 38 is a switching valve (not shown) that switches an oil path to the hydraulic lifting cylinder 54 of the seedling raising / lowering mechanism 50 via a wire, a rod, an arm, or the like. It is linked to. For this reason, according to the angle of the switching cam 80 centering on the connection shaft 38, the raising, stopping, lowering, and planting of the seedling planting unit 40 are controlled. That is, the switching cam 80 can rotate in conjunction with the planting lift lever 36 to switch the operation state of the seedling planting unit 40.

  Also, in the vicinity of the switching cam 80, a cam motor 110 that is a turning interlocking actuator that switches the selection state of the planting lift lever 36 by being driven when the traveling vehicle body 2 is turning is disposed. The cam motor 110 moves the seedling planting unit 40 when the rear wheel 5 rotates a predetermined number of times when the traveling vehicle body 2 reaches the end of the field and moves to turn, and the rear wheel 5 rotates along with the turn. It is a means for lowering automatically. Specifically, a motor arm 112 is fixed to an operating shaft 111 that rotates when the cam motor 110 is driven, and a motor-side pin 113 is erected at the tip of the motor arm 112.

  On the other hand, a pin hole 88 is formed in the vicinity of the raised position 83 in the switching cam 80, and the cam side pin 116 is erected in the switching cam 80 by fitting the cam side pin 116 into the pin hole 88. Has been. Further, a planting arm 115 is connected to the cam side pin 116, and a long hole is formed in the planting arm 115. The motor-side pin 113 is inserted into the elongated hole and is slidably fitted.

  In addition, a triangular plate 120 is fixed below the switching cam 80 in order to detect the position of the switching cam 80, and a plate pin 121 is erected at the apex of the plate 120. In addition, a potentiometer 125 is disposed in the vicinity of the plate 120 and below the cam motor 110. The potentiometer 125 includes a meter arm 126 having a long hole 127 and a shaft of the potentiometer 125. It is fixed to. The potentiometer 125 can detect the angle of the meter arm 126, and the plate pin 121 is slidably fitted in the elongated hole 127 of the meter arm 126.

  For this reason, when the switching cam 80 rotates, the relative positional relationship between the plate pin 121 and the potentiometer 125 changes, so that the meter arm 126 rotates, and the potentiometer 125 rotates the meter arm 126. The rotation state of the switching cam 80 can be detected by the movement.

  With the above configuration, when the handle 32 is operated in the turning end direction, the cam motor 110 is operated to rotate the switching cam 80 to switch to the lowered position 85, so that the seedling planting unit 40 is automatically lowered. Can do. When the handle 32 is further operated, the cam motor 110 is actuated to rotate the switching cam 80 to switch to the planting position 86, so that the seedling planting unit 40 is fully lowered and the planting device is started at the position where the straight traveling is started. The seedling planting by 41 can be started automatically. This eliminates the need to perform the lowering operation of the seedling planting unit 40 and the operation operation of the planting device 41 at the end of turning, thus improving operability and allowing the operator to concentrate on the turning operation. Since it becomes easy to match the attachment start position to the planting end position of the adjacent strip, the seedling planting accuracy is improved.

  In addition, the meter arm 126 provided on the potentiometer 125 detects the rotation state of the switching cam 80, and switches the operation of the cam motor 110 based on the detection result. Since it is prevented that the motor 110 operates too much and the planting apparatus 41 is operated, the planting apparatus 41 does not scrape the seedling in the air, and the waste of the seedling can be reduced.

  9 is a cross-sectional view taken along the line CC of FIG. A rotation sensor 170 that is a movement detection member that detects the rotation speed of the rear wheel 5 is attached to each of the left and right rear wheel gear cases 22. These rotation sensors 170 are a left rotation sensor 171 which is a rotation sensor 170 attached to a left rear gear case 23 which is a rear wheel gear case 22 located on the left side, and a right rear wheel gear case which is a rear wheel gear case 22 located on the right side. The right-side rotation sensor 172 that is the rotation sensor 170 attached to 24 differs in the form of attachment.

  Specifically, since the rotation sensor 170 needs to be arranged in a direction orthogonal to the rotation axis for detecting the rotation speed, the right rotation sensor 172 is orthogonal to the input shaft to the right rear wheel gear case 24. In the direction, it is attached to the upper part of the right rear wheel gear case 24.

  On the other hand, the left rear wheel gear case 23 has an output portion 25 that outputs the output from the engine 10 to the leveling rotor 160 side, and this output portion 25 is located above the left rear wheel gear case 23. . For this reason, the left rotation sensor 171 is attached to the left rear wheel gear case 23 in a direction perpendicular to the input shaft to the left rear wheel gear case 23 and obliquely upward from the input shaft toward the central axis of the input shaft. ing.

  FIG. 10 is a main part configuration diagram of the seedling transplanter shown in FIG. These left rotation sensor 171, right rotation sensor 172, cam motor 110, potentiometer 125, and marker motor 166 are connected to a controller 200 that is an electronic control device that controls each device mounted on the seedling transplanter 1, The controller 200 is used to control the seedling transplanter 1. Among these, the left rotation sensor 171 and the right rotation sensor 172 detect the rotation speed of the rear wheel 5 that can be detected by the respective rotation sensors 170 and transmit the detection result to the controller 200. The potentiometer 125 also detects the rotation state of the switching cam 80 and transmits the detection result to the controller 200. Of the electrical devices connected to the controller 200, at least the potentiometer 125 is connected to the controller 200 via a giboshi 210 that can be attached and detached without using tools. The giboshi 210 is disposed in the control unit 30 and can be inserted and removed by opening the front cover 31.

  Further, a back switch 201 which is a reverse detection member for detecting a reverse operation of the speed change lever 35 is provided in the vicinity of the speed change lever 35, and this back switch 201 also detects the detection result of the reverse operation of the speed change lever 35 as a controller. 200.

  Further, the control unit 30 is provided with a notification buzzer 202 that is a cancel notification member that notifies the operator that the turn interlock control has been released by operating when the turn interlock cancellation condition is satisfied. The notification buzzer 202 is also connected to the controller 200. The controller 200 controls the cam motor 110 and the marker motor 166 using the detection results of the rotation sensor 170, the potentiometer 125, the back switch 201, and the like, and operates the notification buzzer 202.

  Further, a lowering adjustment dial 205 which is a lowering switching member for switching the lowering timing of the seedling planting unit 40 is disposed in the control unit 30. The lowering adjustment dial 205 is connected to the controller 200 and can be adjusted by opening the front cover 31 so that the members in the control unit 30 can be touched. The descending timing of the seedling planting unit 40 adjusted by the descending adjustment dial 205 is input to the controller 200 and used in a program executed when the seedling planting unit 40 descends.

  In addition, the lowering adjustment dial 205 can adjust the lowering timing by rotating it, and within the predetermined range on both the fast and slow sides of the lowering timing from the standard position, there is a dead zone. It has become. For example, the lowering adjustment dial 205 has a dead zone in the rotation range of 45 ° from the standard position, and even if it is rotated within this range, the lowering timing does not change. The timing can be adjusted.

  FIG. 11 is a top view of the control section shown in FIG. An operation panel 181 on which devices used by an operator during operation of the seedling transplanter 1 are disposed in the rear upper portion of the control unit 30 positioned in front of the cockpit 28. A handle post 180 that rotatably supports the handle 32 that performs the turning operation of the traveling vehicle body 2 is disposed near the center of the operation panel 181 and extends upward while tilting backward from the operation panel 181. Exist. The handle 32 is positioned at the upper end of the handle post 180 and is rotatably supported by the handle post 180. Therefore, the handle 32 is located at the center of the operation panel 181 when viewed in the direction of the rotation axis of the handle 32. It is provided so as to be rotatable around the portion.

  Further, on the operation panel 181, a turn interlock switch 185, which is a turn interlock operation member that switches between “on (actuation)” and “off (non-actuation)” of the swing interlock control, is provided on the lower rear side of the handle post 180. It is arranged. In addition, the operation panel 181 is provided with a planting start adjusting dial 186 that is a planting switching member that switches the operation timing of the planting device 41 step by step on the side of the turning interlock switch 185, and further, the handle post 180. The display part 182 which displays the operation state of each part of the seedling transplanter 1 is arrange | positioned at both right and left sides. The display unit 182 has a planting monitor lamp 183 for notifying the operator that the seedling planting unit 40 is in the planting state by, for example, lighting when the planting lift lever 36 is in the “planting” position. Is provided.

  The shift lever 35 and the planting lift lever 36 are provided in the control unit 30, the shift lever 35 is disposed on the left side of the operation panel 181, and the planting lift lever 36 is disposed on the right side of the operation panel 181. ing. The speed change lever 35 and the planting lift lever 36 extend substantially upward from the control unit 30 and can be operated in a desired manner by moving both in a substantially front-rear direction.

  The seedling transplanter 1 according to the present embodiment is configured as described above, and the operation thereof will be described below. During operation of the seedling transplanter 1, traveling of the traveling vehicle body 2 and planting of seedlings placed on the seedling placement unit 45 are performed by power generated by the engine 10. At that time, the driving operation is performed while visually recognizing the display unit 182 of the operation panel 181. However, since the display unit 182 is disposed on both sides of the handle post 180, the operator uses the spokes of the handle 32 and the outer ring. The display unit 182 can be visually recognized from the defined space. For this reason, the worker performs a driving operation while visually recognizing the display unit 182 having high visibility. Further, since the turn interlock switch 185 is disposed on the lower rear side of the handle post 180, it is difficult for an operator to touch during the driving operation, and “turn on” and “turn off” of the turn interlock control are erroneously performed. The operation can be performed without switching.

  The planting operation during the operation of the seedling transplanter 1 is performed by rotating the planting claw 42 while the entire planting device 41 rotates with the rotation axis in the left-right direction, so that the seedling placed on the seedling placement unit 45 is rotated. Gradually plant in the field. At the time of planting work, seedlings are planted in a plurality of rows by traveling with the traveling vehicle body 2 in the field while operating the planting device 41 in this way.

  For this reason, at the time of planting work, the operator who operates seedling transplanter 1 switches work shift lever 35 to advance, and works in the state where seedling planting part 40 was lowered. In this working state, the planting lift lever 36 is set to the “down” position (see FIGS. 8 and 17). Accordingly, the switching cam 80 connected to the planting lift lever 36 is in a state where the positioning roller 105 enters the lowered position 85 of the positioning portion 82.

  When the traveling vehicle body 2 reaches the end of the field, the operator turns the traveling vehicle body 2 by rotating the handle 32. When the handle 32 is rotated, the steering arm 60 is rotated about the steering shaft 33 along with the rotation. As a result, the two tie rods connected to the tie rod connecting portion 61 of the steering arm 60 move, and the knuckle arms of the left and right front wheel final cases 21 to which the respective tie rods are attached rotate. Thereby, since the front wheel 4 rotates, the traveling vehicle body 2 starts turning.

  At this time, as the steering arm 60 rotates, the mounting pin 66 attached to the steering arm 60 moves away from the spring-side connecting portion 71 of the autolift operating arm 70 while rotating around the steering shaft 33. Move in the direction. Since the mounting pin 66 and the spring side connecting portion 71 are connected by a connecting spring 75, when the mounting pin 66 moves away from the spring side connecting portion 71, the spring side connecting portion 71 includes: Due to the pulling force of the connecting spring 75, a force directed toward the mounting pin 66 acts.

  Since the spring-side connecting portion 71 is rotatable about the rotation shaft 72 of the autolift operating arm 70, when a force directed toward the mounting pin 66 is applied to the spring-side connecting portion 71. The spring side connecting portion 71 moves in the direction of the mounting pin 66 by rotating about the rotation shaft 72. Further, since the entire auto lift operation arm 70 is rotatable about the rotation shaft 72, the spring side connecting portion 71 is moved in the direction of the mounting pin 66 by the pulling force of the connecting spring 75. In this case, the entire autolift operating arm 70 rotates about the rotation shaft 72.

  In this case, the cable side connecting portion 73 moves in a direction of pulling the arm cable 77 connected to the cable side connecting portion 73. For this reason, in the autolift arm 90 to which the other end side of the arm cable 77 is connected, the tensile force from the arm cable 77 acts on the portion on the cable connecting portion 91 side. As a result, in the auto lift arm 90, the portion on the cable connecting portion 91 side moves to the lower side, which is the direction of the tensile force of the arm cable 77.

  Here, it is assumed that the autolift arm 90 is in the automatic switching mode. That is, it is assumed that the lock pin 101 of the back lift arm 95 has entered the hole of the auto lift arm 90. In this case, when the autolift arm 90 moves downward, the backlift arm 95 also moves downward via the lock pin 101, and the positioning roller 105 connected to the backlift arm 95 also moves downward. As a result, the positioning roller 105 is detached from the positioning portion 82 of the switching cam 80.

  On the other hand, since the urging force is constantly applied to the switching cam 80 by a spring (in the direction of arrow F in FIG. 6), when the positioning roller 105 is removed from the positioning portion 82, the switching cam 80 is moved by the positioning roller 105. Since it is no longer regulated, it rotates in the direction of the urging force all around the connecting shaft 38. Thereby, the planting lift lever 36 that rotates together with the switching cam 80 also rotates together with the switching cam 80 and moves to the “up” position (see FIG. 15). Therefore, the switching valve for switching the oil path to the hydraulic lifting cylinder 54 of the seedling planting unit lifting mechanism 50 is switched to the “up” side, and the seedling planting unit 40 moves upward. In this way, when the operator rotates the handle 32 at the end of the field, the seedling planting unit 40 is automatically raised. The autolift arm 90 is provided as a raising arm that rotates the switching cam 80 to the raised state of the seedling planting unit 40 in conjunction with the operation of the autolift operating arm 70.

  When the operator manually moves the auto lift arm 90 and removes the lock pin 101 of the back lift arm 95 from the hole of the auto lift arm 90, the auto lift arm 90 is turned by rotating the handle 32. Even when 90 moves downward, the backlift arm 95 does not move downward. In this case, since the positioning roller 105 does not move downward and does not come off the positioning portion 82 of the switching cam 80, the switching cam 80 does not rotate. Therefore, since the raising / lowering state of the seedling planting part 40 does not change during the turning operation, the operator can measure the raising / lowering timing of the seedling planting part 40 by himself / herself. Thereby, although the operation at the time of turning becomes complicated and the operability is lowered, seedlings can be planted according to the field conditions and planting work conditions.

  Further, when the handle 32 is rotated in order to turn the traveling vehicle body 2, the pulling force of the connecting spring 75 accompanying the rotation of the steering arm 60 acts on the autolift operating arm 70 as described above. The auto lift operating arm 70 rotates and the seedling planting portion 40 is automatically raised, but the connection spring 75 has elasticity and stretchability. For this reason, when the steering wheel 32 is largely rotated, the steering arm 60 is largely rotated, and when the autolift operating arm 70 is also largely rotated, the autolift operating arm 70 is moved from the autolift arm 90 side. Depending on the resistance, the tensile force from the arm cable 77 may increase and act.

  In this case, since the resistance of the autolift operating arm 70 to the pulling force of the connecting spring 75 is increased, the connecting spring 75 is stretchable when the mounting pin 66 continues to rotate away from the autolift operating arm 70. The total length increases. As a result, the steering arm 60 can be largely rotated without the autolift operating arm 70 approaching the mounting pin 66 any further, so that the steering arm 60 can be rotated without generating a mechanical lock. As a result, the raising timing of the seedling planting part 40 is accelerated, so that the seedling is prevented from being pushed down and the seedling grows well.

  12-14 is explanatory drawing in the case of rotating a switching cam with the motor for cams. 15-18 is explanatory drawing of the position of a planting raising / lowering lever. When the auto lift arm 90 is in the automatic switching mode, the seedling planting unit 40 automatically rises as the traveling vehicle body 2 turns, but the traveling vehicle body 2 is further turned. In this case, the seedling planting unit 40 is automatically lowered. The turning interlock control, which is the control of the seedling planting unit 40 when the traveling vehicle body 2 is turning, is performed by the controller 200 controlling each part based on the traveling state of the traveling vehicle body 2.

  In the turning interlock control by the controller 200, when the rotation speed of the rear wheel 5 detected by the rotation sensor 170 reaches the preset rotation speed in a state where the seedling planting part 40 is raised, the controller 200 performs a cam. A drive signal is output to the motor 110 for use. Specifically, the difference between the rotation speed detected by the left rotation sensor 171 and the rotation speed detected by the right rotation sensor 172 is greater than or equal to a predetermined value, and the higher rotation speed is greater than the preset rotation speed N1. When it is high, the controller 200 determines that it is time to lower the seedling planting unit 40. When this determination is made, the controller 200 outputs a drive signal to the cam motor 110.

  The cam motor 110 operates in response to a drive signal from the controller 200 and moves the switching cam 80. That is, since the seedling planting part 40 is in the raised position during turning, the planting lift lever 36 is in the “up” position, and the positioning roller 105 is in the raised position 83. Therefore, the controller 200 drives the cam motor 110 in the direction in which the switching cam 80 rotates in the direction in which the raised position 83 of the positioning portion 82 is located.

  That is, the controller 200 drives the cam motor 110 in a direction in which the motor side pin 113 of the motor arm 112 moves away from the switching cam 80. Thereby, since the planting arm 115 connected to the switching cam 80 by the cam side pin 116 is pulled in a direction away from the switching cam 80, the switching cam 80 is also rotated by this force.

  The positioning roller 105 entering the positioning portion 82 is biased upward by the biasing force of the spring, but when the switching cam 80 is forcibly rotated by the driving force of the cam motor 110, The positioning roller 105 sequentially gets over the positioning portion 82. For this reason, the positioning roller 105 in the raised position 83 moves from the stop position 84 (FIG. 12) to the lowered position 85 (FIG. 13). That is, the switching cam 80 and the planting lift lever 36 rotate until the positioning roller 105 is positioned at the lowered position 85. For this reason, the planting lifting / lowering lever 36 located at the “up” position (FIG. 15) passes through the “stop” position (FIG. 16) and moves to the “down” position (FIG. 17). Thereby, the seedling planting part 40 descends. Further, when the switching cam 80 is rotated by driving the cam motor 110 as described above, the potentiometer 125 detects the state of the switching cam 80 and rotates it to an appropriate angle.

  Further, the controller 200 drives the cam motor 110 to rotate the switching cam 80 and the planting lift lever 36 until the positioning roller 105 is positioned at the planting position 86 (FIG. 14). As a result, the planting lift lever 36 moves to the “planting” position (FIG. 18). Specifically, the controller 200 rotates the switching cam 80 and the planting lift lever 36, and then both the rotation speed detected by the left rotation sensor 171 and the rotation speed detected by the right rotation sensor 172 are predetermined rotation speeds. When N2 is equal to or greater than N2 and the difference in rotational speed between the two becomes substantially zero, it is determined that the seedling planting unit 40 is lowered and the traveling vehicle body 2 is in a straight traveling state. The rotational speed N2 used when determining whether or not the traveling vehicle body 2 is in the straight traveling state is higher than the rotational speed N1 used for determining whether or not the traveling vehicle body 2 is turning. ing. The controller 200 that determines that the seedling planting unit 40 is lowered and the traveling vehicle body 2 is in the straight traveling state engages the planting clutch. Thereby, the planting apparatus 41 of the seedling planting part 40 starts an operation | movement, and restarts planting of a seedling.

  Further, since the potentiometer 125 can detect the state of the planting lift lever 36 through detecting the state of the switching cam 80, the potentiometer indicates that the planting lift lever 36 has moved to the “planting” position. If detected at 125, the planting monitor lamp 183 of the display unit 182 is turned on. This notifies the operator that the current working state is a seedling planting state.

  Here, when the controller 200 determines that the seedling planting unit 40 is lowered and the traveling vehicle body 2 is in the straight traveling state, the controller 200 changes the driving force of the cam motor 110 in the opposite direction when a predetermined time has elapsed. To output That is, the controller 200 outputs a drive signal to the cam motor 110 so as to generate a drive force in a direction in which the switching cam 80 and the planting lift lever 36 are rotated in the direction in which the positioning roller 105 is directed toward the raised position 83. To do. As a result, the planting lift lever 36 that has been switched to the “planting” position can be freely switched by an external input. For this reason, for example, when the current timing is not the timing desired by the operator, the operator manually performs an input operation in the “up” direction with respect to the planting lift lever 36, whereby the planting lift lever 36. Rotate easily. Thereby, planting by the seedling planting part 40 can be stopped.

  In addition, the controller 200 is in a state where the switching cam 80 and the planting lift lever 36 are in the “down” state (FIGS. 13 and 17) and the seedling planting unit 40 is in the lowered state until a predetermined time elapses. When it is determined that the traveling vehicle body 2 does not go straight and does not activate the planting device 41, the driving force of the cam motor 110 is output in the opposite direction. That is, the controller 200 determines that both the rotation speed detected by the left rotation sensor 171 and the rotation speed detected by the right rotation sensor 172 are equal to or higher than N2 until the predetermined time has elapsed with the seedling planting portion 40 lowered. If this is not the case, or if the difference in rotational speed between the two is not substantially zero, the cam motor 110 is configured to generate a driving force in the direction of rotating the switching cam 80 and the planting lift lever 36 in the “up” direction. In response, a drive signal is output. As a result, the planting lift lever 36 that has been switched to the “down” position can be freely switched manually, and the operator can arbitrarily set the operation timing of the seedling planting unit 40. It becomes possible to adjust.

  In this way, the controller 200 determines the turning direction based on the difference between the rotational speeds detected by the left and right rotation sensors 170. That is, at the time of turning interlock control, the controller 200 resets the detection result of the rotation sensor 170 to 0 when the seedling planting unit 40 is raised, and when the difference between the left and right rotation speeds becomes a predetermined value or more, the rotation speed is increased. It is determined that the vehicle is turning in the smaller direction. The controller 200 uses the determination result thus determined in various controls.

  For example, after determining that the difference between the rotation speed detected by the left rotation sensor 171 and the rotation speed detected by the right rotation sensor 172 is greater than or equal to a predetermined value in a state where the seedling planting unit 40 is raised during the turning interlock control. When the magnitude of the rotation speed is reversed on the left and right, the turning interlock control of the seedling planting unit 40 is cancelled. For example, by turning the traveling vehicle body 2 to the left, the rotation speed detected by the right rotation sensor 172 is higher than N1, and the rotation speed detected by the left rotation sensor 171 is lower than N1, and then turning the handle 32 back. When the rotation speed detected by the left rotation sensor 171 is higher than N1 and the rotation speed detected by the right rotation sensor 172 is lower than N1, the turn interlock control is canceled.

  Further, the controller 200 reverses the reverse operation of the transmission lever 35 in a state where the switching cam 80 and the planting lift lever 36 are in the “down” state (FIGS. 13 and 17) and the seedling planting unit 40 is lowered. When detected by the switch 201, an output for making the driving force of the cam motor 110 in the opposite direction is performed. That is, the controller 200 detects the reverse operation of the shift lever 35 with the back switch 201 in a state where the seedling planting unit 40 is lowered due to the rotation speed detected by the rotation sensor 170 being between N1 and N2. In this case, a drive signal is output to the cam motor 110 so as to generate a drive force in a direction in which the switching cam 80 and the planting lift lever 36 are rotated in the “up” direction. As a result, the planting lift lever 36 that has been switched to the “down” position can be freely manually switched. Further, when the reverse operation of the shift lever 35 is detected by the back switch 201 in this way, the turning interlock control of the seedling planting unit 40 is released.

  When the turning interlock control is released as described above, the controller 200 notifies the operator by sound that the turning interlock control has been released by operating the notification buzzer 202. The notification buzzer 202 is released when the operator operates the planting lift lever 36 to the “planting” position. Alternatively, even if the turning interlock switch 185 is operated to “ON”, the notification by the notification buzzer 202 is canceled and the next turning interlock is accepted.

  Note that the cancel notification member for notifying the operator that the turning interlock control has been canceled may be provided by other than the notification buzzer 202. For example, when the turning interlock switch 185 is configured by an illumination switch and the turning interlock control is canceled. Alternatively, the operator may be notified by blinking the turning interlock switch 185. In other words, the cancel notification member may notify the operator that the turning interlock control has been canceled by light.

  In addition, the operation of the seedling planting unit 40 that operates as described above can be adjusted by a planting start adjustment dial 186 provided in the control unit 30 or a lowering adjustment dial 205 provided in the control unit 30. It has become. For example, by adjusting the planting start adjustment dial 186, the timing for starting the planting by operating the planting device 41 can be changed during the turning interlock control. Further, by adjusting the lowering adjustment dial 205, the lowering timing of the seedling planting unit 40 with respect to the turning state of the traveling vehicle body 2 can be changed during the turning interlock control.

  The lowering timing of the seedling planting unit 40 is normally not changed so much, but the lowering adjustment dial 205 is disposed in the control unit 30 and cannot be adjusted unless the front cover 31 is opened. . For this reason, the descent timing is not changed by touching the descent adjustment dial 205 by mistake. Furthermore, since the lowering adjustment dial 205 is configured with a dead zone, the lowering timing does not change even if the lowering adjustment dial 205 is accidentally touched during maintenance.

  When the planting operation is performed by the seedling transplanter 1 as described above, the controller 200 alternately operates the left and right drawing markers 165 and reverses the working state and the non-working state of the left and right drawing markers 165. . Specifically, when the controller 200 detects that the planting lift lever 36 has been switched from the “stopped” state to the “lifted” state by the potentiometer 125 capable of detecting the state of the planting lift lever 36. Then, the operation of the marker motor 166 is switched.

  That is, the left and right line drawing markers 165 switch the line drawing marker 165 that is activated each time they turn, but during turning interlock control, the planting lift lever 36 is switched to the “up” position each time it turns. For this reason, every time the planting lift lever 36 is switched from “stop” to “lift”, the drawing marker 165 to be operated is turned among the left and right drawing markers 165 by switching the drawing marker 165 to be operated. It can be switched every time.

  Further, the switching of the operation of the marker motor 166 for switching between the operation and non-operation of the left and right drawing markers 165 is specifically performed using a relay (not shown). That is, the marker motors 166 are arranged on the left and right in the same manner as the drawing markers 165, and are provided corresponding to the drawing markers 165. By switching the relay state, the operating states of the left and right marker motors 166 are switched to draw the lines. The operation of the marker 165 can be switched. For this reason, the controller 200 switches between the operation and non-operation of the left and right drawing markers 165 through switching the state of the relay.

  The relay is attached to a member to which the potentiometer 125 is attached, with the harness side facing downward. That is, since the electrical connection side is directed downward, the waterproof property is high, and the waterproof property and the dustproof property are further improved by being located in the exterior part.

  FIG. 19 is an explanatory diagram when the shift lever is switched to reverse. When the shift lever 35 is switched to reverse, the bar 107 inserted into the notch hole 97 of the backlift on / off lever 96 is pulled by the shift lever cable 108 connected to the shift lever 35 and the bar 107 at both ends. Is moved downward. In this case, when the backlift on / off lever 96 is set so that the bar 107 is positioned in the vertically long portion of the notch hole 97, the bar 107 only moves in the vertically long portion of the notch hole 97. In this case, the bar 107 has no effect on the backlift on / off lever 96, and the switching cam 80 also maintains the previous state.

  On the other hand, when the backlift on / off lever 96 is set so that the bar 107 is positioned in the horizontally long portion of the notch hole 97, when the bar 107 moves downward, the bar 107 is moved to the lower side edge of the horizontally long portion. Abut. As a result, the bar 107 pushes down the backlift on / off lever 96, and the positioning roller 105 connected to the backlift on / off lever 96 also moves downward. In this case, the positioning roller 105 is disengaged from the positioning portion 82 of the switching cam 80.

  Accordingly, the switching cam 80 and the planting elevating lever 36 are moved around the connecting shaft 38 in the direction of the urging force by the spring in the same manner as when the handle 32 is rotated when the autolift arm 90 is in the automatic switching mode. Rotate and move to the “up” position. Thereby, the switching valve which switches the oil path to the hydraulic lifting cylinder 54 of the seedling planting unit lifting mechanism 50 is switched to the “up” side, and the seedling planting unit 40 moves upward. In this way, when the shift lever 35 is switched to the reverse position in the state where the back lift on / off lever 96 is set so that the bar 107 is positioned in the horizontally long portion of the notch hole 97, the seedling planting unit 40 is automatically To rise.

  In the seedling transplanting machine 1 according to this embodiment, the pivot interlock control is performed while detecting the state of the planting lift lever 36 and the like by the potentiometer 125. The detection state of the planting lift lever 36 and the like by the potentiometer 125 is the same as that of the potentiometer 125. Adjustment can be made by inserting and removing the plug 210 connected to the controller 200. Specifically, the state of the potentiometer 125 to be detected is stored in the controller 200 by removing the giboshi 210 in the state of the potentiometer 125 stored in the controller 200, and the detection state by the potentiometer 125 is adjusted.

  For example, the controller 200 can memorize the state of the potentiometer 125 when the planting lift lever 36 is in the “up” position by removing the giboshi 210 while the planting lift lever 36 is in the “up” position. If the potentiometer 125 is stored in the controller 200 during the operation of the seedling transplanter 1, the planting lift lever 36 can be determined to be in the “up” position. Similarly, by pulling out the giboshi 210 with the planting lift lever 36 in the “stop”, “down”, and “planting” positions, the planting lift lever 36 is “stopped”, “down”, “ Each state of the potentiometer 125 in the case of the “planting” position can be stored in the controller 200. Thereby, when the seedling transplanter 1 is initially set or assembled again after disassembly, the state of the planting lift lever 36 can be brought into a state that can be detected with high accuracy.

  In addition, when the state of the planting lift lever 36 detected by the potentiometer 125 is memorized by inserting / removing the giboshi 210 in this way, each time the state of the planting lift lever 36 to be stored is switched, the operator is notified by a buzzer or the like. It is preferable to notify. Further, when the controller 200 stores the detection state by the potentiometer 125 as described above, it is preferable to notify the operator by a buzzer or the like even when the potentiometer 125 is not within a predetermined range. Further, even when the planting elevating lever 36 is in the “up”, “stop”, “down”, and “planting” positions, if the potentiometer 125 at each position is not within the predetermined range, the operator may use a buzzer or the like. It is preferable to notify to.

  In addition, other detection states may be adjusted by a method similar to the method of adjusting the detection state by the potentiometer 125 by inserting and removing the giboshi 210. For example, the median value of the planting start adjustment dial 186 may be stored in the controller 200 by inserting / removing the giboshi 210.

  Further, the left and right line drawing markers 165 during the turn interlocking control are switched between the left and right when the planting lift lever 36 is switched from the “stop” state to the “up” state. It may be switched by inserting and removing. For example, when the planting lift lever 36 is switched from the “down” to the “stop” state, or when the planting lift lever 36 is switched from the “planting” to the “stop” state, the drawing marker 165 to be operated is switched. It may be switched by inserting and removing.

  In the seedling transplanter 1 according to the above-described embodiment, when the planting device 41 enters a planting operation during the turning interlock control, the planting plant 41 is planted by an external input by switching the driving state of the cam motor 110. The selection state of the lift lever 36 can be switched. For this reason, when it becomes a state which does not want to operate the planting apparatus 41 at the time of turning interlock control, planting is performed by the operator switching the planting lift lever 36 to a state other than “planting”. Can not be. As a result, it is possible to easily correct the planting timing of the seedling planting operation linked to the turning.

  In addition, by making it possible to correct the timing of planting at the turn interlock control in this way, for example, the planting start position of the seedling can be matched with the planting end position of the adjacent strip, so that the seedling cannot be planted. The work of planting seedlings manually becomes unnecessary, and the labor of the operator can be reduced. Moreover, when planting seedlings at the end of the field in the last step, it is possible to prevent the planting positions of the seedlings from being overlapped, so that consumption of excess seedlings can be suppressed. As a result, the efficiency of planting work can be increased.

  In addition, when the cam motor 110 is in a state in which the operation restriction of the planting lift lever 36 is released during the turning interlock control, when the operator operates the planting lift lever 36 corresponding to the work situation, It is possible to prevent an excessive force from being applied to the planting lift lever 36. As a result, it is possible to prevent a large load from being applied to the cam motor 110 and the like, and it is possible to prevent damage and improve durability.

  If the seedling planting unit 40 is lowered by the turning interlock control and the planting device 41 is not activated until a predetermined time has elapsed, the controller is based on the detection result of the rotation sensor 170. When 200 is determined, the selection state of the planting lift lever 36 can be switched by an external input. As a result, the traveling vehicle body 2 is stopped on the spot, or the operation timing of the planting device 41 is too early or too late, so that the traveling vehicle body 2 is moved. When the planting device 41 is delayed, the worker can operate the planting device 41 at an arbitrary timing. As a result, the seedling planting start position can be adjusted with higher accuracy, and the seedling planting part 40 can be moved backward to the planting start position with the seedling planting part 40 raised. .

  In addition, after starting the raising / lowering of the seedling planting part 40 by the turning interlock control, after determining the turning direction of the traveling vehicle body 2 based on the difference in the rotational speeds of the left and right rear wheels 5, the rotational speeds of the left and right rear wheels 5 are determined. When the size is reversed, the selection state of the planting lift lever 36 can be switched by an external input. As a result, when the operator makes a wrong turning operation, or when turning in a special locus at a place where normal 180 degree turning is not possible due to conditions such as muddyness, turning interlock control is automatically cancelled. It is possible to prevent the seedling planting part 40 from starting to descend earlier than the planned planting start position and to prevent the planting device 41 from operating before the planned planting start position. As a result, the planting start position of the seedling can be matched with the planting end position of the adjacent strip, and the seedling planting accuracy can be improved.

  In addition, when the reverse operation of the shift lever 35 is detected by the back switch 201 before the seedling planting unit 40 is lowered and the planting device 41 is operated by the turning interlocking control, the planting ascending / descending is performed by an external input. The selection state of the lever 36 can be switched. Thus, the traveling vehicle body 2 is moved backward and planted even in a situation where the seedling planting unit 40 is not lowered and the planting device 41 is not operated unless the seedling planting is advanced from the position where planting should start. By manually operating the elevating lever 36, the seedling planting unit 40 can be lowered or the planting device 41 can be operated at an arbitrary position. As a result, when seedlings are planted at the end of the field in the last step, the seedling planting positions can be prevented from overlapping, and consumption of excess seedlings can be suppressed.

  In addition, since the operator can recognize that the turning interlock control has been canceled by operating the notification buzzer 202, the seedling planting portion 40 is lowered by the operator operating the planting lift lever 36. And forgetting the operation of the planting device 41 can be prevented. Thereby, planting of a seedling can be restarted at an appropriate position, and work efficiency can be improved. The operation of the alarm buzzer 202 is released when the planting lift lever 36 is operated to the “planting” position or when the rotation interlock switch 185 is operated “ON”, so that the next swing interlocking control can be performed. In this state, the notification buzzer 202 can be released. As a result, an operation for newly starting the turn interlocking control becomes unnecessary, and the work efficiency can be improved.

  Further, when the potentiometer 125 detects that the planting lift lever 36 has been switched to a state in which the seedling planting unit 40 is raised, the controller 200 reverses the working state and the non-working state of the left and right drawing markers 165. Because of the configuration, the left and right drawing markers 165 can be switched regardless of whether the turning interlocking control is normally performed or canceled in the middle. As a result, the drawing marker 165 that draws a line on the farm scene at the time of the next planting work can be reliably put into a working state, and the work efficiency can be improved. Moreover, since the line | wire used as a standard of planting driving | running | working can be formed reliably, planting driving | running | working can be made easy to match with an adjacent strip | line and the planting precision of a seedling can be improved.

  Further, since the turning interlock switch 185 is disposed in the lower rear portion of the handle post 180 in the control unit 30, it is possible to prevent the hand or the like from touching the turning interlock switch 185 during the operation of the handle 32. It is possible to prevent the operation from being continued without the operator noticing that the turn interlock control has been released. As a result, the operability of the turning operation is improved, and the seedling planting at an appropriate position can be started, so that the seedling planting accuracy can be improved.

  In addition, since the display units 182 provided in the control unit 30 are disposed on the left and right sides of the handle post 180, the operator can visually recognize the display unit 182 from the space of the handle 32. As a result, the operator can easily be aware of the occurrence of abnormality, and can prevent the occurrence of extra work and poor growth of seedlings due to the continued abnormality.

  In addition, since the planting start adjustment dial 186 is disposed on the side of the turn interlocking switch 185 in the control unit 30, the operation timing of the planting device 41 is accelerated by operating the planting start adjustment dial 186. Can be changed to slow down or slow down. As a result, the planting start timing can be changed in accordance with the turning distance of the traveling vehicle body 2 and the number of strips at the end of the field, so that it is not necessary to plant seedlings manually without planting seedlings. Can do. As a result, the labor of the operator can be reduced and the planting position of the seedling can be prevented from overlapping when the seedling is planted at the end of the field in the last step, thereby suppressing the consumption of excess seedlings. can do.

  In addition, since the lowering adjustment dial 205 for switching the lowering timing of the seedling planting unit 40 is disposed inside the control unit 30, the lowering timing of the seedling planting unit 40 is operated by operating the lowering adjustment dial 205. Can be changed to make it faster or slower. As a result, the lowering timing of the seedling planting unit 40 can be changed according to the turning distance of the traveling vehicle body 2 and the number of strips at the end of the farm field. The operation timing of the attaching device 41 can be adjusted. As a result, seedlings can be planted at an appropriate timing, and work efficiency and seedling planting accuracy can be improved.

  In addition, since the detection state by the potentiometer 125 can be adjusted by inserting and removing the giboshi 210, the set of the potentiometer 125 can be transferred to the seedling transplanter 1 without using a checker device (not shown). Can be done alone. As a result, maintainability can be improved.

[Modification]
In addition, although the seedling transplanting machine 1 described above has been described as the seedling transplanting machine 1 that can be traveled by operating the shift lever 35, the seedling transplanting machine 1 is a seedling transplanting machine 1 that includes a sub-shift lever. Alternatively, the turn interlocking control may be performed according to the operation state of the auxiliary transmission lever. FIG. 20 is a main part schematic diagram illustrating a modification of the seedling transplanter according to the embodiment. FIG. 21 is a view taken in the direction of arrows EE in FIG. FIG. 22 is a view taken along the line FF in FIG. In the case where the seedling transplanter 1 is provided with a sub-shift lever 230 that switches between a moving state for running on the road, a planting state for working on the field, and a neutral state, the sub-shift lever 230 is switched to the moving state. In this case, it is preferable not to perform the turning interlock control.

  For example, in the auxiliary transmission lever 230 shown in FIGS. 20 to 22, a lever guide 240 that guides the auxiliary transmission lever 230, a moving guide 245 that is a guide for switching the auxiliary transmission lever 230 to a moving state, and a neutral state A neutral guide 246 that is a guide when switching to the planting and a planting guide 247 that is a guide when switching to the planting state are each formed in a cut shape.

  The lever guide 240 is provided with a moving speed state detection switch 250 which is a detecting means for detecting that the auxiliary transmission lever 230 is switched to the moving state. The moving speed state detection switch 250 is attached to a switch mounting portion 243 that is a mounting portion of the moving speed state detection switch 250 in the lever guide 240 so as to be energized. The lever guide 240 is made of a metal material, and the guide attachment portion 241 that is a portion for attaching the lever guide 240 to the traveling vehicle body 2 is grounded. As a result, the moving speed state detection switch 250 can be energized via the lever guide 240.

  In addition, a lever state detection unit 252 that more reliably detects that the auxiliary transmission lever 230 has been switched to the moving state and transmits it to the moving speed state detection switch 250 is disposed in the vicinity of the moving speed state detection switch 250. ing. The moving speed state detection switch 250 and the lever state detecting unit 252 are disposed on an extension when the auxiliary transmission lever 230 is moved in the moving state.

  On the other hand, the auxiliary transmission lever 230 has a convex portion 231 that protrudes in the direction of the lever state detection unit 252 on the side surface of the auxiliary transmission lever 230 that faces the lever state detection unit 252. The convex portion 231 comes into contact with the lever state detection unit 252 when the sub-shift lever 230 is switched to the movement state, and the lever state detection unit 252 pushes the movement speed state detection switch 250 and moves the movement speed state detection switch 250. The lever state detector 252 can be pushed until it is detected. Thereby, when the sub-shift lever 230 is switched to the moving state, the moving speed state detection switch 250 can detect that the auxiliary transmission lever 230 has been switched to the moving state.

  When the controller 200 detects that the sub-shift lever 230 has been switched to the moving state by the moving speed state detection switch 250, the controller 200 does not perform the turning interlock control even when the turning interlock switch 185 is “ON”. It has become. Thereby, since it is possible to prevent the turning interlock control from being erroneously performed during traveling on the road, it is possible to improve safety during traveling on the road.

  Further, it is preferable that at least the shape of the auxiliary transmission lever 230 held by the moving guide 245 is opposite to the direction in which the moving speed state detection switch 250 is pressed (see FIGS. 20 and 21). As a result, the auxiliary speed change lever 230 can be held by the moving guide 245 while the moving speed state detection switch 250 is sufficiently pressed, so that a shortage of strokes for pressing the moving speed state detection switch 250 can be prevented. As a result, it is possible to more reliably detect that the auxiliary transmission lever 230 has been switched to the moving state.

  In addition, the seedling transplanter 1 may appropriately combine the configurations and controls used in the above-described embodiments and modifications, or may use other than the configurations and controls described above. Regardless of the configuration of the seedling transplanter 1 and the control method, when the planting device 41 enters the planting operation during the turning interlock control, the driving state of the cam motor 110 is switched and the planting lift lever 36 is manually operated. By enabling the switching, it is possible to easily correct the planting timing of the seedling planting operation linked to the turning.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Traveling vehicle body 4 Front wheel 5 Rear wheel 10 Engine 21 Front wheel final case 22 Rear wheel gear case 25 Output part 30 Steering part 32 Handle 35 Shift lever (traveling operation member)
36 Planting lift lever (planting operation member)
40 Seedling planting part 41 Planting device 47 Float 50 Seedling planting part lifting mechanism 60 Steering arm 70 Auto lift operation arm 80 Switching cam 90 Auto lift arm 95 Back lift arm 96 Back lift on / off lever 105 Positioning roller 110 Cam motor (Swivel interlocking actuator)
125 Potentiometer 130 Preliminary seedling stage 165 Drawing marker 170 Rotation sensor (movement detection member)
180 Handle post 181 Operation panel 182 Display unit 183 Planting monitor lamp 185 Turn interlock switch (turn interlock operation member)
186 Planting start adjustment dial (planting switching member)
200 controller (control device, marker switching device)
201 Back switch (reverse detection member)
202 Notification buzzer (cancellation notification member)
205 Lowering adjustment dial (Descent switching member)
210 Giboshi 230 Sub-shift lever 231 Convex part 250 Moving speed state detection switch 252 Lever state detection part

Claims (7)

A seedling planting part (40) is provided on the traveling vehicle body (2) so as to be movable up and down. A turning interlocking actuator (110) for forcibly operating the attaching operation member (36) is provided, and the turning interlocking actuator (110) is operated in conjunction with the turning of the traveling vehicle body (2) to operate the seedling planting part ( 40) A control device (200) that performs turning-linked control by operating the descent and the start of operation is provided, and the seedling planting part (40) is inactivated in conjunction with the turning operation of the traveling vehicle body (2). Provided with a seedling planting part raising mechanism (50) for raising together with movement detecting members (171, 172) for detecting the number of rotations of the wheels (5) of the traveling vehicle body (2),
The control device (200) lowers the seedling planting part (40) based on the number of rotations of the wheel (5) detected by the movement detection members (171, 172), and the seedling planting part (40 ) When the movement detection member (171, 172) does not detect the set rotation speed within a predetermined time after the descent, or when the movement detection member (171, 172) detects the set rotation speed, 40), after the pivoting actuator (110) is driven in the reverse direction, the planting operation member (36) that has been switched to the “down” or “planting” position is manually “raised”. A seedling transplanting machine characterized in that it can be switched to a position freely. A pair of left and right wheels (5, 5) are provided, and left and right movement detection members (171, 172) for detecting the rotational speed of the left and right wheels (5, 5) are provided,
The control device (200) compares the rotation speeds of the left and right wheels (5, 5) detected by the left and right movement detection members (171, 172) when the seedling planting part (40) starts to rise. The turning direction of the traveling vehicle body (2) is determined, and if the magnitude relationship between the rotation speeds of the left and right wheels (5, 5) is reversed during turning, the turning interlock actuator (110) is driven in the opposite direction, The seedling transplanter according to claim 1, wherein the planting operation member (36) switched to the "down" or "planting" position is manually switchable to the "up" position. A pair of left and right wheels (5, 5) are provided, left and right movement detection members (171, 172) for detecting the rotational speed of the left and right wheels (5, 5) are provided, and the rear of the traveling vehicle body (2) Left and right rear wheel gear cases (23, 24) for transmitting driving force to the left and right wheels (5, 5) are provided, and the left and right movement detection members (171, 172) are provided on the left and right rear wheel gear cases (23, 24). And a ground leveling rotor (160) for leveling the field in the lower front side of the seedling planting part (40), and an output part (25) for outputting a driving force to the leveling rotor (160) is provided on the left and right rear wheels. Provided above the input shaft on either side of the gear case (23, 24),
The movement detection member (171) on the side where the output unit (25) is provided is provided in an obliquely downward posture toward the input shaft obliquely above the input shaft of the rear wheel gear case (23),
The movement detection member (172) on the opposite side to the side where the output section (25) is provided is provided in a directly downward posture toward the input shaft directly above the input shaft of the rear wheel gear case (24). The seedling transplanter according to claim 1 or 2. A travel operation member (35) for switching between forward and backward travel of the travel vehicle body (2) is provided, and a reverse detection member (201) for detecting a reverse operation of the travel operation member (35) is provided,
The control device (200) detects the backward operation of the traveling operation member (35) from when the seedling planting part (40) is lowered until the seedling planting part (40) is activated, (110) is driven in the reverse direction, so that the planting operation member (36) switched to the “down” or “planting” position can be manually switched to the “up” position. Item 4. The seedling transplanter according to any one of Items 1 to 3.   A control unit (30) disposed on the traveling vehicle body (2) is provided, and an operation panel (181) disposed on the rear upper part of the control unit (30) and a central portion of the operation panel (181). The handle post (180) of the handle (32) that is disposed and performs the turning operation of the traveling vehicle body (2), and is disposed at the lower rear portion of the handle post (180), and the operation and the non-operation of the turning interlock control are performed. 5. A turning interlocking operation member (185) for switching between and a display portion (182) disposed on the left and right of the handle post (180) and displaying the operating state of each portion. The seedling transplanter according to any one of the above.   A turning interlocking operation member (185) for switching between the operation and non-operation of the turning interlock control is provided, and the traveling state of the traveling vehicle body (2) is moved at a high speed on the road, the planting state at a low speed on the field, and the traveling is stopped. A sub-transmission operation member (230) for switching to one of the neutral states is provided, and a movement state detection member (250) for detecting that the sub-transmission operation member (230) is operated to a movement state is provided, and the control device (200) The seedling transplanter according to any one of claims 1 to 5, wherein when the movement state detection member (250) is in a detection state, the turning interlock control is switched to a non-operation state. The steering section (30) is provided with a planting switching member (186) for switching the operation timing of the seedling planting section (40) stepwise to the side of the turning interlocking operation member (185),
The seedling transplanter according to claim 6, wherein a descending switching member (205) for switching a descending timing of the seedling planting section (40) is provided inside the control section (30).

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