JP5861984B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanting machine for transplanting seedlings such as paddy rice in a field and having a function of automatically stopping an engine during idling.

  The seedling transplanting machine described in Patent Document 1 adopts a configuration that changes the engine speed in accordance with forward / backward travel and neutral operation of the machine body, thereby improving fuel efficiency and enabling smooth operation of the work machine. . However, with this configuration, if the worker is left idle when replenishing seedlings and fertilizers or resting, fuel consumption will continue and fuel consumption will not be improved, and exhaust gas will be discharged. There is a problem that continues to deteriorate environmental adaptability. To solve this problem, it is possible for the operator to turn off the engine, but the operator's operation increases and the reliability is lacking.

  The seedling transplanter described in Patent Document 2 adopts a configuration in which the engine is stopped without performing a key operation when the main shift lever is operated in a predetermined direction from the neutral position, so that the engine is easily turned off when stopped. It suppresses fuel consumption and exhaust gas emissions during idling. However, since the idling state is maintained if the operator forgets the operation of turning off the engine by lever operation, there remains a problem of lack of certainty as in the configuration of Patent Document 1. In addition, because the engine stop position is formed in the lever guide groove of the main speed change lever, if the main speed change lever is operated incorrectly, the engine will stop at a position unintended by the operator, resulting in lower work efficiency. Problems arise.

JP 2011-103802 A JP 2010-094134 A

  When an operator performs replenishment work of seedlings and fertilizers, the problem that fuel consumption cannot be improved by continuing to consume fuel is reliably solved without depending on the operator's operation. In particular, in a seedling transplanter, seedling replenishment work and seedling delivery work and spare seed carry-in work are carried out after stopping traveling, and the frequency is quite high, so it is necessary to reliably solve this problem. .

In order to solve the above problems, the present invention has taken the following technical means.
That is, the invention according to claim 1 is directed to a work machine body (2) that travels on a farm field with front wheels (10) and rear wheels (11), an engine (20) as a power source, and starting of the engine (20). And a key device (106) for operating the stop, a travel restricting device (104) for restricting the rotation of the front wheel (10) and the rear wheel (11), and a seedling platform (see FIG. 51) and a seedling planting unit that includes a seedling planting device (52) for taking seedlings from this seedling mounting stand (51) and planting them in a farm, and using a branch mechanism from the engine (20) to move up and down by a link mechanism (4), a main speed change lever (203) for operating the travel, stop, and speed of the work machine body (2), and a sub speed change lever (205) for selecting a road travel mode and a planting work travel mode of the work machine body. ), The main transmission lever (203) and the auxiliary gear The control device (101) is provided with seedling transplanter for controlling the engine state receives a signal from a speed lever (205),
A first position detection member (102) for detecting the position of the main transmission lever (203), a timer device (103) operated by a signal of the first position detection member (102), and the auxiliary transmission lever ( 205), a second position detection member (108) for detecting the position of the key, a key position sensor (107) for detecting the position of the key device (106), and a travel restriction limit for detecting the operation of the travel restriction device (104). A switch (105) is further provided, and the main speed change lever is configured to select any one of a forward position, a neutral position, and a reverse position as an operation position, and the control device (101) is configured to select the main speed change position. A condition in which the time when the lever (203) is located in the neutral position passes the first set time of the timer device (103), a condition in which the seedling planting part (4) is not in the lifting operation,
The time when the sub-shift lever is located in the planting work travel mode, or the time when the sub-shift lever is located in the road travel mode and the main speed change lever (203) is located in the neutral position is greater than the first set time. Control to automatically stop the engine (20) when all of the conditions for elapse of the second set time of the long timer device (103) are satisfied,
After the engine (20) is automatically stopped, the engine (20) is in a stopped state, the key position of the key device (106) is located at the ON position where the engine (20) operates, and the travel restriction device ( 104), and when the main transmission lever (203) is moved to a non-neutral position, the seedling transplanter is controlled to restart the engine (20) .

According to a second aspect of the present invention, the control unit is configured so that the time that the sub-shift lever is positioned in the road traveling mode and the main shift lever (203) is positioned in the neutral position is longer than the first set time. The seedling transplanting machine according to claim 1, wherein when the engine (20) is automatically stopped by satisfying a condition for elapse of the second set time of the timer device (103), the notification device is operated. is there.

According to a third aspect of the present invention , a replenishing seedling is placed on the front portion of the work machine body (2), a spare seedling frame base (38) that can be switched between an overlapped state and a deployed state is disposed, and An illumination device (37) is provided on a lower surface of the preliminary seedling frame base (38), and the illumination device (37) is lit when the preliminary seedling frame base (38) is in an unfolded state. The seedling transplanter according to 1 or 2.

Moreover, invention of Claim 4 is equipped with the fertilizer application device (5) which draws out the granular fertilizer stored by the fertilizer hopper (60) by a fixed amount, and the said fertilizer application device (5) is the said fertilizer hopper (60). ) And a blower (58) that generates air for conveying fertilizer, a fertilizer supply hose (63) connected to the blower (58), a feed-out part (61) for feeding the fertilizer, and the blower (58) A blower electric motor (53) that can be driven to change forward / reverse rotation, and when the blower (58) is rotated forward, the fertilizer is conveyed from the fertilizer hopper (60) to the feeding portion (61), and The seedling transplanter according to any one of claims 1 to 3 , wherein when the blower (58) is reversed, the fertilizer is sucked into the fertilizer hopper (60) from the fertilizer supply hose (63) .

The invention according to claim 5 is the seedling transplanter according to claim 4 , wherein a net-like hose lid (63a) is provided at the inlet of the fertilizer supply hose (63) .

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According to the first aspect of the present invention, the engine is stopped when the main transmission lever is moved to the neutral position and the first set time elapses, so that it is ensured that the engine is left in the idling state. As a result, fuel consumption can be reduced and fuel consumption can be improved without depending on the operator, and exhaust gas emission can be reduced and environmental adaptability can be improved.

Further, according to the first aspect of the present invention, when the key shift position of the key device is in the ON position, the engine is activated when the main speed change lever is operated with the travel restricting device activated. There is no need to re-operate, improving work efficiency. Further, since the engine does not operate even when the main speed change lever is operated in a state where the travel restriction device is not operated such as not stepping on the brake device, sudden start is prevented and work safety is improved.

Further, according to the first aspect of the invention, during road traveling on the field outside, because there are many opportunities to stop the running account of such passers and passing vehicles, or signal, sub shift lever road mode In this case, the engine does not stop even when the main shift lever is operated to be neutral, so that an operation for operating the engine each time it is stopped becomes unnecessary, so that the operability is improved.

Further, according to the first aspect of the present invention, even if the sub-shift lever is in the road travel mode, the time for which the main shift lever is located in the neutral position is longer than the first set time. Since the engine is automatically stopped when the set time has elapsed, it is possible to prevent the engine from being left in the idling state.

Furthermore, according to the invention described in claim 1, since it is possible to prevent the engine from stopping while raising or lowering the seedling planting portion, it is not necessary to start the engine again at the start of seedling planting, and the work efficiency is improved. Will improve. In addition, since the seedling stage and the planting apparatus can move to an appropriate planting start height and can start traveling at the same time, the planting start positions can be aligned, and the seedling planting accuracy can be improved.

According to the second aspect of the present invention, when the engine is stopped with the lapse of the second set time, since the notification device is actuated, the operator is reliably notice the stop of the engine.

According to the third aspect of the present invention, an illumination device is provided on the lower surface of the preliminary seedling frame base, and the illumination device is configured to be lit when the preliminary seedling frame base is in a deployed state. Safety can be increased .
According to the invention described in claim 4, since the blower electric motor that drives the blower so as to be able to change forward and reverse rotation is configured to suck the fertilizer from the fertilizer supply hose into the fertilizer hopper when the blower is reversed, It becomes possible to suck in granular fertilizer and send it to the fertilizer hopper, making the fertilizer bag hole small, preventing the fertilizer from containing moisture, and also to the fertilizer hopper without wetting the fertilizer even on rainy days etc. Can supply.
According to the invention described in claim 5, since the mesh-like hose lid is provided at the inlet of the fertilizer supply hose, when there is a residue in the fertilizer bag, the fertilizer supply hose provided with the hose lid is inserted into the fertilizer bag. By rotating the blower electric motor in the reverse direction, it is possible to remove air from the fertilizer bag, and it is possible to prevent the fertilizer from getting wet. As a result, the remaining fertilizer can be used during the next seedling transplanting operation, and waste of the fertilizer can be prevented, and troubles such as clogging of the fertilizer can be prevented in the fertilizer application equipment.

It is a side view of the seedling transplanter of one embodiment concerning the present invention. It is a top view of the seedling transplanting machine of FIG. It is the front view and side view of a main transmission lever. It is a flowchart of invention of Claim 1 . It is a flowchart of invention of Claim 1 . It is a flowchart which shows an example of embodiment of this invention . It is a flowchart of invention of Claim 1 . It is a flowchart which shows an example of embodiment of this invention . It is a partial side view of another embodiment of a fertilizer applicator. It is the elements on larger scale of the fertilizer supply hose to a fertilizer application equipment. It is the elements on larger scale of another embodiment of a preliminary seedling stand. It is a use condition figure of another embodiment of a reserve seedling stand. It is a side view of the seedling transplanter of another embodiment. It is a seedling stand part enlarged view at the time of applying a seedling feed lubricating device. It is a control block diagram of the seedling transplanter of FIG.

  Embodiments specifically configured based on the above technical idea will be described below with reference to the drawings.

  The seedling transplanting machine according to the present invention is integrated with the engine 20 and the traveling part by the left and right front wheels 10 and 10 and the left and right rear wheels 11 and 11, as shown in FIGS. Transmission case 12 for transmitting transmission power to the left, left and right front wheel final cases 13 and 13 for transmitting and supporting left and right front wheels 10 and 10, left and right rear wheel gear cases 18 and 18 for transmitting and supporting left and right rear wheels 11 and 11, etc. And a seedling planting unit 4 for planting seedlings, which is provided at the rear part of the working machine 2 so as to be movable up and down by a lifting link 3. Composed.

  The power transmission path of the seedling transplanter is as follows. The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a belt transmission 21 and a hydraulic continuously variable transmission 23. The rotational power transmitted to the mission case 12 is shifted by a transmission in the case 12 and then separated into traveling power and external power to be extracted.

  A part of the traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and the rest is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. The left and right front wheel final cases 13 and 13 transmit and support the left and right front wheels 10 and 10 on the side of the transmission case 12, and the left and right rear wheel gear cases 18 and 18 An axle that pivots on the left and right sides is provided so as to protrude from the left and right sides of the machine body, and receives right and left shifting power from the transmission case 12.

With the control device of the seedling transplanter of the present embodiment, the operator operates the main transmission lever 203 to continuously move the hydraulic continuously variable transmission 23 from the 9th forward position to the 6th reverse position through the neutral position. In this configuration, the “road running mode” and the “planting operation running mode” can be changed by operating the auxiliary transmission lever 205 by a known auxiliary transmission in the gear type transmission. .
A main transmission potentiometer 102, which is a first position detection member for detecting an angle change of the main transmission lever 203, is provided in the vicinity of the mounting base portion of the main transmission lever 203, and is detected by the main transmission potentiometer 102. The control device 101 calculates the operation amount of the main transmission lever 203 from the angle, and changes the output and the traveling direction of the hydraulic continuously variable transmission 23.
Further, in the vicinity of the auxiliary transmission lever 205, an auxiliary transmission potentiometer that is a second position detection member that detects whether the auxiliary transmission lever 205 is operated in the “road traveling mode” or the “planting operation traveling mode”. 108 is provided, and the control device 101 is configured to switch the traveling mode in accordance with the detected angle of the auxiliary transmission potentiometer 108.

  Next, the external take-out power is transmitted to a planting clutch case 25 provided at the rear part of the traveling machine body 2, and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and the fertilizer application mechanism 5 by the fertilization transmission mechanism 28. Etc. The seedling planting unit 4 includes a transmission case 50 that receives power from the planting transmission shaft 26 at the rear of the machine body, and an operator supplies seedlings to the seedling mount 51 and is arranged in parallel according to the planting condition. The seedlings placed by the device 52 are planted in the field.

The structure of the seedling transplanting part 4 is as follows.
The seedling planting section 4 provided in the seedling transplanting machine shown in this case has a six-row planting structure, a seedling planting transmission case 50 that also serves as a frame, a mat seedling, and a left and right reciprocating motion to each seedling. Are fed to the seedling outlet 51a, and when all the seedlings for one horizontal row are supplied to the seedling outlet 51a, ..., a seedling mount 51, a seedling outlet 51a, A seedling planting device 52 for planting the seedlings supplied to the farm field,..., A pair of left and right drawing markers (184) for drawing the aircraft path in the next process to the topsoil surface, and the like. In the lower part of the seedling planting device 4, a center float 55 is provided in the center, and middle floats 57 and side floats 56 are provided on the left and right sides thereof. When the aircraft is advanced with these floats 55 to 57 in contact with the mud surface of the field, the floats 55 to 57 slide while leveling the mud surface, and the seedling planting device 52,. Planted. Each of the floats 55 to 57 is rotatably attached so that the front end side moves up and down according to the unevenness of the field topsoil surface, and the vertical movement of the front part of the center float 55 is an angle-of-attack control sensor (see FIG. The planting depth of the seedling is always maintained constant by switching the hydraulic valve that controls the lifting hydraulic cylinder 46 according to the detection result to raise and lower the seedling planting unit 4. A rotor 27 (27a, 27b) which is an example of a leveling device is attached to the seedling planting unit 4. In addition, the seedling mount 51 is configured to slide in the left-right direction using a support roller 65a of a rectangular support frame 65 having a full width in the left-right direction and the vertical direction that supports the entire seedling planting unit 4 as a rail.

  The lifting link device 3 that lifts and lowers the seedling planting portion 4 has a parallel link configuration, and includes a single upper link 40 and a pair of left and right lower links 41 and 41. These links 40, 41, 41 are pivotally attached to a rear-view portal-shaped link base frame 42 erected on the rear end of the main frame 15, and a vertical link 43 is connected to the tip side thereof. ing. And the connecting shaft 44 rotatably supported by the seedling planting part 4 is inserted and connected to the lower end part of the vertical link 43, and the seedling planting part 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm integrally formed with the upper link 40. The upper link 40 is expanded and contracted by hydraulically extending the cylinder 46. It rotates up and down and the seedling planting part 4 moves up and down while maintaining a substantially constant posture.

  On both the left and right sides of the front part of the work machine body 2, spare seedling platforms 38, 38 on which replenishment seedlings are placed are provided so as to be pivotable between a position projecting laterally from the machine body and a position housed inside. Each of them is composed of three inclined support members.

  The fertilizer applicator 5 feeds the granular fertilizer stored in the fertilizer hopper 60 by a fixed amount by the feeding portions 61,..., And applies the fertilizer to fertilizer hoses 62,. (Not shown), guided to the fertilizer guide, and a grooving body (not shown) provided on the front side of the fertilizer guide. . Air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilizer hose 62 through the air chamber 59 that is long in the left-right direction, and the fertilizer in the fertilizer hose 62 is forced by the wind pressure. It is designed to be transported.

The configuration around the seedling transplanter operator is as follows.
The upper part of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. A front cover 32 incorporating various operation mechanisms is provided in front of the seat 31, and a handle 34 for steering the front wheels 10 and 10 is provided above the front cover 32. A main transmission lever 203 is provided on the right side of the handle 34, and an auxiliary transmission lever is provided below the main transmission lever 203. The engine cover 30 and the front cover 32 have horizontal floor steps 35 on both the left and right sides of the lower end, and a saddle clutch pedal and the like are arranged. The floor step 35 is partly grid-like, and mud on the shoe of the worker walking through the step 35 falls on the field. The rear part on the floor step 35 is a rear step 36 that also serves as a rear wheel fender.

FIG. 4 is a flowchart showing an embodiment of the invention according to claim 1 . The seedling transplanter according to the present embodiment is provided with the main transmission potentiometer 102 that detects the position of the main transmission lever 203 and a timer device 103 that operates according to a signal from the main transmission potentiometer 102.
The timer device 103 uses an internal timer in the control device 101, but can be provided outside the control device 101 separately. Then, a first set time to be described later is set in advance in the timer device 103.

The starting of the engine 20 will be described below. The engine 20 is often started by inserting a key into the key device 106 and changing the key position, and this method is also adopted in this embodiment. The key device 106 has at least the following three key positions. That is, (a) the key can be inserted and the engine 20 is not operating "OFF position", (b) the "START position" for operating the cell motor, (c) the key after the cell motor is moved, and the engine 20 Is the “ON position” in which is operating. Initially, the key position is at the OFF position. When the position is changed to the START position, the cell motor or the like is activated, the engine 20 is started, and then the key position is positioned at the ON position by an internal spring mechanism or the like.
The key position is detected by the key position sensor 107, and the current key position is transmitted to the control device 101.

  The present embodiment will be described according to a flowchart. As a step (hereinafter referred to as S) 1, the engine 20 of the seedling transplanter is started. In S <b> 2, the position of the main transmission lever 203 is detected by the main transmission potentiometer 102. When the operator operates the main transmission lever 203, the forward / backward / stop selection of the work machine body and the forward / reverse speed can be changed depending on the position.

  In S3, it is determined from the signal from the main transmission potentiometer 102 whether or not the main transmission lever 203 is in a neutral position for stopping the work machine body. If “Yes”, the process proceeds to S4 and the timer device 103 performs main transmission. The time during which the lever 203 is in the neutral position is measured. If “No”, the operation is continued in accordance with a command from the main transmission lever 203.

In S5, the timer device 103 determines whether or not the time during which the main transmission lever 203 is positioned at the neutral position exceeds a preset first setting time. That is, the first set time is a time during which the operation of the engine 20 is maintained even when the main transmission lever 203 is located at the neutral position.
If “Yes” in S5, the process proceeds to S6 and the engine 20 is stopped. In this case, the key position remains in the “ON” position. If “No”, the main transmission potentiometer 102 confirms whether or not the position of the main transmission lever 203 is in the neutral position. If “Yes”, the timer device 103 continues to measure the time. If there is, return to immediately before step 2 and continue to detect the position of the main transmission lever 203.

Next, a flow for starting the engine 20 from the engine stop state in S6 will be described.
In S7, the main transmission lever 203 is operated and moved to the non-neutral position. In S8, it is determined whether the key position is in the ON position. If “Yes”, the process moves to the next determination S9, and if “No”, the engine is stopped.

In S9, it is determined whether or not the travel regulation device is activated. This is because if the engine 20 is started in a state where the travel restriction device 104 is not operating, the possibility of sudden start increases and it becomes difficult to ensure safety.
The travel regulation device 104 is a travel brake device in this embodiment, but includes a device that controls power transmission such as a clutch. In addition, a travel regulation limit switch 105 that is in a detection state when the travel regulation device 104 is operated to a position where the travel can be reliably regulated is provided. The regulation device 104 is in an activated state.
If “Yes” in S9, the process proceeds to S10, the engine 20 is started, and the engine operating state is continued. If “No”, the process returns to S7 and waits for a signal indicating that the main transmission lever 203 has been operated.

  By moving the main transmission lever 203 to the neutral position and stopping the engine 20 when a predetermined time elapses, it is possible to reliably prevent the engine 20 from being left in an idling state, so that it depends on the operator. As a result, fuel consumption is reduced and fuel consumption is improved, and exhaust gas emission is suppressed and environmental adaptability is improved.

  Further, when the key shift position of the main shift lever 203 is operated while the travel restriction device 104 is operated when the key position of the key device 106 is in the ON position, the key device 106 needs to be operated again. No work efficiency is improved. Further, since the engine 20 does not operate even when the main shift lever 203 is operated in a state where the travel restriction device 104 is not operated, such as when the brake device is not stepped on, sudden start is prevented, and work safety is improved. improves.

FIG. 5 is a flowchart showing one embodiment of the invention according to claim 1 .
The seedling transplanting machine according to the present embodiment is provided with the auxiliary transmission potentiometer 108 for detecting the position of the auxiliary transmission lever 205.
The signal from the auxiliary transmission potentiometer 108 is taken into the control device 101 as an interlock signal. The flow is as follows.
That is, in S101, the position of the auxiliary transmission lever 205 is detected using the auxiliary irregular potentiometer 108. In S102, it is determined whether or not the auxiliary transmission lever 205 is in the road traveling mode. If “Yes”, the operation of the timer device 103 is stopped and the numerical value is reset. If “No”, it moves between S1 and S2 in FIG. 4 and executes the flow.

  When driving on the road, there are many opportunities to stop traveling due to passersby, passing vehicles, or traffic lights, so the engine 20 does not stop even when the main transmission lever 203 is operated neutrally. Since the operation for activating 20 becomes unnecessary, the operability is improved.

Further, a second set time is separately provided in the control device 101, and when the main transmission lever 203 is located at the neutral position longer than the second set time, the interlock shown in FIG. It is good also as a control structure to stop. However, in this case, it is desirable that a notification device such as a buzzer operates so that the operator can be sure that the engine has stopped.

FIG. 6 is a flowchart showing another embodiment.
The control device 101 of the seedling transplanter according to the present embodiment has an automatic turning control configuration. Here, the automatic turning control refers to control for operating the planting device 4 in conjunction with the turning operation of the work machine body 2 in addition to the operation control of each device. Although most seedling planting work is performed by automatic turning control, it is necessary to work without operating all the planting devices 52 at the time of cutting, and in this case, automatic turning control should not be performed. . The signal for performing the automatic turning control is handled as an interlock signal in the control device. The flow is as follows.
That is, the position of the automatic turning control button is detected in S201. In S202, it is determined whether or not the signal is “ON”. If “Yes”, the operation of the timer device 103 is stopped and the numerical value is reset. If “No”, it moves between S1 and S2 in FIG. 4 and executes the flow.

  Work that does not perform automatic turning control, that is, planting work on the shoreline with some planting devices stopped, is often done at low speed and often has a chance to stop, so unnecessary engine start is omitted. In addition, it is possible to eliminate the need to re-activate the engine 20 each time it stops, so that the work efficiency is improved.

  In this embodiment, the flow is executed by turning on and off the automatic turning control button, but an interlock signal is obtained by detecting the position of the operation lever of the partial strip clutch provided for each partial strip of the planting device 4. Is also possible. In this case, a third position detection member for detecting the position of the operation lever is provided for each partial clutch, and when at least one of them is in the “off” position, the operation of the timer device is stopped and the numerical value is set. Run the flow to reset.

FIG. 7 is a flowchart showing an embodiment of the invention according to claim 1 . The main speed change lever 203 of the seedling transplanter according to the present embodiment is provided with a lift switch 203b for moving the seedling planting part 4 up and down. The “up” or “down” signal of the lift switch 203b is handled as an interlock signal in the control device. The flow is as follows. That is, the up / down switch 203b is detected in S301. In S302, it is determined whether one of the signals of the “up” or “down” position, which is a non-neutral position, is transmitted. If “Yes”, the operation of the timer device 103 is stopped and the numerical value is reset. If “No”, it moves between S1 and S2 in FIG. 4 and executes the flow.

Since it is possible to prevent the engine 20 from stopping while the seedling planting part 4 is raised or lowered, it is not necessary to restart the engine 20 at the start of planting seedlings, and the work efficiency is improved.
In addition, since the seedling placing table 51 and the seedling planting device 52 can move to an appropriate planting start height and can start traveling at the same time, the planting start positions can be aligned and the seedling planting accuracy is improved. To do.

FIG. 8 shows a flowchart showing another embodiment.
Although the timer device 103 of the seedling transplanter according to the present embodiment uses an internal timer in the control device, it can also be provided outside the control device. And the 3rd setting time mentioned later is preset to the timer apparatus. In S401, the position of the main transmission lever 203 is detected by the first position detection member. In S402, it is determined from the signal from the first position detecting member whether or not the main transmission lever 203 is in a neutral position for stopping the work machine body. The time during which the speed change lever 203 is in the neutral position is measured.
In S <b> 404, the timer device 103 determines whether or not the time during which the main transmission lever 203 is positioned at the neutral position exceeds a preset third setting time. Here, the third set time is a time during which the operation of the hydraulic continuously variable transmission 23 is maintained even when the main transmission lever 203 is located at the neutral position. If “Yes” in S404, the process proceeds to S405, a stop signal for the hydraulic continuously variable transmission 23 is transmitted, and the hydraulic continuously variable transmission 23 is stopped. In this case, the key position remains in the “ON” position. If “No”, the first position detection member checks whether the position of the main transmission lever 203 is in the neutral position. If “Yes”, the timer device 103 continues to measure the time. ”, The process returns to immediately before step 401 and continues to detect the position of the main transmission lever 203.

  By stopping the hydraulic continuously variable transmission 23 during idling, the forward / backward movement of the traveling machine body 2 can be reliably stopped. This prevents the traveling machine body 2 from suddenly starting even if the main speed change lever 203 or the brake device is mistakenly operated during operations such as replenishing seedlings, thereby improving the safety of the work.

During the operation of replenishing the seedling mount 51 with seedlings, it is possible to prevent the hydraulic continuously variable transmission 23 from stopping while the link mechanism is being operated. As a result, unnecessary stoppage of the link mechanism can be prevented, and the operation efficiency is improved, for example, it becomes unnecessary to operate the engine 20 again to bring the hydraulic continuously variable transmission 23 into an operating state.

As another embodiment of the blower electric motor 53 of the fertilizer applicator 5, a motor capable of changing forward and reverse rotation may be used. FIG. 9 shows the configuration in this case. By providing the fertilizer supply hose 63 in the blower 58 and rotating the blower electric motor 53 in the reverse direction, the granular fertilizer can be sucked from the fertilizer bag and fed into the fertilizer hopper 60. With such a configuration, the hole of the fertilizer bag can be made small, and the fertilizer can be prevented from containing moisture, or can be supplied to the fertilizer hopper 60 without getting the fertilizer wet even on rainy days. It becomes.

In addition, as shown in FIG. 10 , a hose lid 63 a having a mesh that is finer than granular fertilizer may be installed at the inlet of the fertilizer supply hose 63. Fertilizer may remain in the fertilizer bag after the seedling transplanting operation is finished, but if the fertilizer contains moisture, problems such as difficulty in discharging from the fertilizer application 5 occur. In this way, when there is a residue in the fertilizer bag, the fertilizer bag can be deflated by inserting the fertilizer supply hose 63 provided with the hose lid 63a into the fertilizer bag and reversely rotating the blower electric motor 53. Thus, it is possible to prevent the fertilizer from being damp. Thereby, the remaining fertilizer can be used at the time of the next seedling transplanting operation, and waste of the fertilizer can be prevented, and troubles such as clogging of the fertilizer in the fertilizer application device 5 can be prevented.

As another embodiment of the three-stage preliminary seedling stage 38 (38a, 38b, 38c), an illumination device 37 may be provided on the lower surface thereof. FIG. 11 shows the spare seedling stage 38 in an overlapped state, and FIG. 12 shows a state where the preliminary seedling stage 38 is in the unfolded state and the illumination device 37 is lit.

  Conventionally, the work lighting device of a seedling transplanter has only a low part such as a hood and a step, and has a narrow illumination range. Therefore, it has been difficult to replenish spare seedlings with a straw or the like at night. In particular, as the scale and concentration increase, it is necessary to consider the work that takes place at night. Therefore, the illumination device 37 is installed on the lower surface of each preliminary seedling table 38, and when the preliminary seedling table 38 is in the unfolded state, the illumination device 37 is turned on to widen the illumination range. Thereby, the safety | security of the operation | work at night can be improved. In particular, when the preliminary seedling stage 38 is deformed by the seedling stage changing motor 39, a part of the electricity supplied to the motor can be used, so that the illumination device can be installed more easily. As the illumination device, an LED (Light Emitting Diode) is adopted in consideration of space saving and power saving.

As another embodiment of the seedling planting unit 4, a seedling feeding lubrication device may be provided. FIG. 14 shows a side view of a riding seedling transplanter according to another embodiment using the seedling feeding lubrication device, and FIG. 15 shows a partially enlarged view above the seedling mounting platform 51 when the seedling feeding lubrication device is applied.
The seedling stage 51 is provided with a seedling feeding belt 51b and the like so as to smoothly feed the seedling. However, when the weather is fine, the upper surface of the seedling stage 51 is dried and a seedling feeding failure occurs. There is. In order to prevent the seedling stage 51 from drying, a seedling feeding lubrication device is provided. The seedling feed lubrication device is composed of a pump 71 provided on the link base frame 42 and a water tank 72 provided on the front bumper. An opening hole 76 for injecting water is formed above the seedling mount 51, and the water tank 72 is provided. And the pump 71 are connected by the tube 73, and the pump 71 to the opening hole 76 of the seedling stage 51 are also connected by the tube 73. The provision of the water tank 72 in the front bumper is in consideration of the overall balance of the seedling transplanter. The pump 71 is set so as to be operated every time the seedling planting unit 4 moves up and down. The positions of the opening holes 76 are desirably arranged in a so-called staggered manner with the phases shifted vertically.

DESCRIPTION OF SYMBOLS 1 Seedling transplanter 2 Working machine body 4 Seedling planting part 10 Front wheel 11 Rear wheel 20 Engine 23 Hydraulic stepless transmission device 51 Seedling stand 52 Seedling planting device 101 Control device 102 Main transmission potentiometer (first position detection member)
103 timer device 104 travel regulation device 106 key device 108 sub-shift potentiometer (second position detection member)
203 Main transmission lever 203b Lift switch 205 Sub transmission lever

Claims (5)

On the work machine body (2) that travels in the field with the front wheel (10) and the rear wheel (11),
An engine (20) as a power source;
A key device (106) for operating start and stop of the engine (20);
A travel restriction device (104) for restricting rotation of the front wheel (10) and the rear wheel (11);
A seedling mounting base (51) on which a plurality of seedlings can be mounted, and a seedling planting device (52) for taking seedlings from the seedling mounting base (51) and planting them in a field, branching from the engine (20) A seedling planting part (4) that moves up and down by a link mechanism using power,
A main transmission lever (203) for operating, stopping, and speed of the work machine body (2);
A sub-transmission lever (205) for selecting a road travel mode and a planting work travel mode of the work machine;
In the seedling transplanting machine provided with a control device (101) that receives signals from the main transmission lever (203) and the auxiliary transmission lever (205) and controls the engine state,
A first position detection member (102) for detecting the position of the main transmission lever (203), a timer device (103) operated by a signal of the first position detection member (102), and the auxiliary transmission lever ( 205), a second position detection member (108) for detecting the position of the key, a key position sensor (107) for detecting the position of the key device (106), and a travel restriction limit for detecting the operation of the travel restriction device (104). A switch (105) is further provided;
The main transmission lever is configured to select any one of a forward position, a neutral position, and a reverse position as an operation position,
The control device (101) includes a condition that a time when the main transmission lever (203) is located at a neutral position passes a first set time of the timer device (103),
The condition that the seedling planting part (4) is not in the lifting operation,
The time when the sub-shift lever is located in the planting work travel mode, or the time when the sub-shift lever is located in the road travel mode and the main speed change lever (203) is located in the neutral position is greater than the first set time. Control to automatically stop the engine (20) when all of the conditions for elapse of the second set time of the long timer device (103) are satisfied,
After the automatic stop of the engine (20), the engine (20) is in a stopped state, the key position of the key device (106) is located at the ON position where the engine (20) operates, and the travel restriction device ( 104) is operated, and when the main transmission lever (203) is moved to a non-neutral position, the seedling transplanter is controlled to restart the engine (20) . The control unit includes a second set time of the timer device (103) in which the sub-shift lever is positioned in the road travel mode and the main shift lever (203) is positioned in the neutral position longer than the first set time. The seedling transplanter according to claim 1, wherein when the engine (20) is automatically stopped due to the satisfaction of the conditions for elapse of time, a notification device is activated . A supplementary seedling is placed on the front part of the work machine body (2), a spare seedling frame base (38) that can be switched between an overlapped state and a deployed state is disposed, and a lower surface of the preliminary seedling frame base (38) is provided. The seedling transplanter according to claim 1 or 2 , wherein an illuminating device (37) is provided, and the illuminating device (37) is turned on when the preliminary seedling frame base (38) is in an unfolded state . The fertilizer hopper (60) includes a fertilizer (5) that feeds a certain amount of granular fertilizer stored in the fertilizer hopper (60), and the fertilizer (5) is connected to the fertilizer hopper (60) and carries fertilizer. , A fertilizer supply hose (63) connected to the blower (58), a feed-out part (61) for feeding the fertilizer, and a blower that drives the blower (58) so that the forward / reverse rotation can be changed. Electric motor (53),
During forward rotation of the blower (58), the fertilizer is conveyed from the fertilizer hopper (60) to the feeding portion (61),
The seedling transplanter according to any one of claims 1 to 3 , wherein when the blower (58) is reversed, the fertilizer is sucked into the fertilizer hopper (60) from the fertilizer supply hose (63) . The seedling transplanter according to claim 4 , wherein a net-like hose lid (63a) is provided at an inlet of the fertilizer supply hose (63) .