JP6936072B2 - Multi-porting machine - Google Patents

Description

The present invention relates to a multi-planting machine for planting seedlings while laying a rolled sheet on the soil surface.

When cultivating crops, mulch cultivation is carried out in which the soil surface is covered with mulch material, and even when cultivating paddy rice, rice is planted at the same time while laying rolled recycled paper on the rice field (soil surface). A passenger-type rice transplanter is being developed. Then, if rice is planted using this rice transplanter, it is expected that labor-saving cultivation of organic rice and pesticide-reduced rice can be performed without the need for herbicides and weeding work.

In addition, since recycled paper mulch blocks most of the sun's rays, germination of weed seeds on the lower surface is suppressed, and even if germination occurs, photosynthesis is not possible and therefore growth is not possible. Alternatively, the sheet physically suppresses growth even after germination. Furthermore, since recycled paper is on the surface of the soil, it is said that the oxygen concentration in the soil is lowered and the germination and growth of weed seeds are suppressed.

Further, in such a mulch transplanter (paper mulch rice transplanter), a planting device for planting seedlings in order to lay a rolled sheet (mulch material, specifically recycled paper) on the soil surface. A roll case constituting the laying device is provided in front of the mulch, and a predetermined amount of the roll-shaped sheet set in the roll case is pulled out on the seat holder. Further, the drawn sheet is brought into close contact with the soil surface by a roller float or a presser roller as the transplanting machine runs, and then the sheets are sequentially pulled out from the roll case and spread on the soil surface.

Then, the planting claws of the planting device plant the seedlings in the soil at the same time as perforating the sheet from above the sheet in close contact with the soil surface. In addition, when one step of planting is performed to reach the headland, the end of the sheet that adheres to the soil surface is cut with a cutter by operating the lever provided next to the driver's seat, and then the work equipment is raised, and then the work machine is raised. The seedlings are planted by turning the transplanting machine toward the next process.

On the other hand, the sheet used in the multi-transplanting machine described above is usually the width (1.8 m) obtained by multiplying the width between the rows (30 cm) by the number of planted rows (6 rows) and the margin width (10 cm:). The width (1.9 meters) is added to the left and right (5 cm), and the length is about 125 meters. Therefore, it is necessary for the multi-porting machine to use such a sheet and lay the sheet so that there is no gap on the entire surface of the seedling planting surface in the field so that weeds do not grow, and the sheet is not twisted too much and torn or lifted in the middle. be.

That is, when performing reciprocating planting, if the distance between adjacent rows between the seedlings planted in the previous step exceeds 40 cm, the wrapping allowance of the sheets disappears and a gap is created between the sheets, and repair work to close this gap is required separately. It becomes. In addition, when the distance between adjacent rows is less than 20 cm, the sheet to be laid covers the adjacent seedlings that have already been planted, inhibiting the growth of the seedlings and causing a stock shortage. Therefore, it is required to run the work as straight as possible to prevent the seat from twisting, and to maintain the space between adjacent rows so that the wrapping allowance of the seat is about 10 cm.

Therefore, during the work run of one stroke, a marker is used to mark the soil surface as a mark when the work run of the next stroke is performed. Therefore, in the next process, if the work is carried out using this mark as a mark, the distance between the adjacent rows with the seedlings planted in the previous process can be set to an appropriate value of about 30 cm, so that the above-mentioned problems can be prevented. can.

Further, when the work is carried out using the roll-shaped sheet described above, the sheet may be used up in the middle. In that case, when the spare roll provided on the traveling machine side is replenished to the laying device, when the support frame of the spare roll is switched from the retracted posture position to the supply posture position with the working machine raised, the spare roll and the seat case It is known that the spare rolls are formed so as to be substantially aligned with each other and the spare rolls are inserted linearly into the seat case to facilitate the replacement of the rolls (see Patent Document 1).

Then, in this case, when the seat is exhausted, the worker interrupts the work running and raises the work machine, and then descends to the side where the seedlings are planted in the next step opposite to the side where the seedlings were planted in the previous step. Perform the replacement work by inserting the spare roll provided on that side into the seat case, and be careful not to trample the already laid seat. When the replacement work is completed, the traveling machine is moved backward to near the end of the already laid seat, and the work machine is lowered so that the end of the seat and the start end of the newly laid seat overlap with each other by about 15 to 20 cm. Resume running.

Japanese Patent No. 4024417 Japanese Patent No. 395396

As mentioned above, in the multi-transplanting machine, in order to eliminate the gap between the sheet laid in the previous process and to prevent the seedlings from being covered by the newly laid sheet, the work is carried out while properly maintaining the space between adjacent rows. There is a need. Therefore, of the left and right markers when performing the work run of one stroke, the marker on the next stroke side is set as the action posture, and a mark is added to the soil surface as a mark when the work run of the next stroke is performed along with the work run. go.

In a normal rice transplanter, when the marker on either the left or right side is selected for the working posture and switched, the switching can be performed by the manual lever operation of the operator at the start of the work running. In addition, when reciprocating planting, the selection of markers is reversed on the outbound route and the inbound route, and this is repeated and the markers are always selected alternately. It is known that the working posture is automatically switched to eliminate the complexity of manual operation and improve work efficiency (see Patent Document 2).

However, in the multi-porting machine, as described above, the seat may be used up in the middle, and in that case, the lowered working machine is raised to switch the support frame of the spare roll from the retracted posture position to the supply posture position, and the spare roll is reserved. The roll is inserted linearly into the seat case to replace the roll. Therefore, when the seat roll was replaced, the work equipment was raised and lowered, and the switching to the alternating automatic working posture was adopted by the marker control device, which is performed in a normal rice transplanter. Then, when the roll exchange work is completed and the work running is resumed, the marker is switched to the opposite side to the side before the automatic switching to the working posture is interrupted.

Then, the marker that switches to the working posture descends to a substantially intermediate position of the sheet laid in the previous stroke, and the tip pierces the sheet to make a hole. Further, if the work continues without noticing this, the holes will be continuously linear or the holes will be intermittently opened, and a repair work for closing the holes will be required separately. In addition, the marker may push down the seedlings that have already been planted, resulting in a stock shortage.

Also, when replanting a row with holes in it later, if a new sheet is laid on the sheet with holes already, the lower sheet may get entangled with the sheet holder and it may not be possible to lay it neatly. .. Therefore, when replanting, it is necessary to manually remove the sheet with holes in advance and take it out of the field, which causes a great loss of work as well as a loss of the sheet.

Therefore, in order to replace the rolls and resume work running as described above, it is often necessary to manually operate the switching to the working posture of the marker so as to select the original marker before the interruption. There is a problem that it is easy to forget and difficult to notice, and it becomes a complicated operation and is avoided.

When replacing the roll, it is conceivable that the engine is stopped. However, when the engine key is turned off, the control device is turned off and the marker selection data is lost, and when the engine is started again and the work is started, the marker selection is switched and a hole is made in the seat. There is also a similar problem.

Therefore, in view of the above problems, the present invention is in a multi-transplanting machine for planting seedlings while laying a rolled sheet on the soil surface, and the rolls are exchanged to restart the work running. It is an object of the present invention to provide a multi-porting machine capable of preventing holes (torn) in a sheet based on a selection error of a marker for switching to a working posture, which occurs at the time of operation.

In order to solve the above problems, the present invention firstly provides a working machine provided with a sheet laying device and a seedling planting device on a traveling machine, and raises the working machine to provide a spare roll on the traveling machine. The laying device is used in a multi-transplanting machine that replenishes a roll-shaped sheet from a table to a laying device and works with a mark on the soil surface as a mark of a marker on either the left or right side that switches to an operating posture by a control device. A seat switch is provided to detect the presence or absence of the seat, and the control device alternately selects a marker for switching to the working posture each time the work machine is lifted or lowered, and when the work running is interrupted to raise or lower the work machine. , When the laying device has a seat and the work machine is raised, a marker for switching to the working posture is selected, and when the work machine is lowered next time, a marker different from that before raising the work machine is applied. On the other hand, when the laying device runs out of seats and the work machine is raised, the marker for switching to the working posture is not selected, and when the work machine is lowered next time, before the work machine is raised. It is characterized by having the same marker in the working posture.

Secondly, the present invention is characterized in that, when a marker for switching to the working posture is designated by an artificial operation, the control device sets the marker for switching to the working posture as the designated marker.

Further, in the third aspect of the present invention, the control device writes the current marker selection state to the non-volatile memory when the seat is exhausted in the laying device and the engine key is turned off, and is non-volatile when the engine key is turned on. It is characterized in that the selected state of the marker is read from the memory and the marker for switching to the working posture is the same as the marker before the engine key is turned off.

Fourth, in the present invention, the control device alternately selects a marker that switches to the working posture each time the work equipment is moved up and down with planting, and in the case of raising and lowering without planting, the marker that switches to the working posture. It is characterized by making no selection.

According to the multi-transplanting machine of the present invention, a seat switch for detecting the presence or absence of a seat in the laying device is provided, and the control device alternately selects a marker for switching to an operating posture each time the working machine is raised or lowered, and works. When the laying device has a seat and the work machine is raised when the running is interrupted and the work machine is raised or lowered, a marker for switching to the working posture is selected, and then when the work machine is lowered. In addition, while the marker different from that before raising the working machine is set to the working posture, when the seat runs out in the laying device and the working machine is raised, the marker for switching to the working posture is not selected, and then the working machine is moved. When lowered, the same marker as before raising the work equipment is placed in the working posture.

Therefore, it is possible to carry out the work by using the marks made on the soil surface as a mark by the automatic alternating selection of the markers without performing complicated operations, whereby the adjacent rows are properly maintained and the seedlings in the field are maintained. The sheet can be spread over the entire surface of the planting surface without any gaps, and the sheet can be neatly spread without causing the sheet to twist and float, and the wind to enter from there to cause turning or misalignment.

Further, even if the laying device runs out of sheets and the work machine is raised to supply the roll-shaped sheet from the spare roll stand to the laying device and then the work machine is lowered to resume the work, the control device raises the work machine. Since the same marker as before raising is placed in the working posture, it is possible to prevent the marker from making a hole in the sheet laid in the previous process due to an error in selecting the marker, and manually make the hole made by the marker. Work can be done efficiently without the trouble of repairing.

Further, when a marker for switching to the working posture is designated by an artificial operation, the control device sets the marker for switching to the working posture as the designated marker. Therefore, it is possible to set the direction of the marker at the beginning of the reciprocating planting, and even if the seats happen to run out at the same time and the rolls are replaced at the headland when the work run of one stroke is completed, the marker of the control device. It is possible to appropriately respond to the selection error by an artificial operation and prevent the marker from drilling a hole in the next process.

Then, the control device writes the current marker selection state to the non-volatile memory when the laying device runs out of seats and the engine key is turned off, and reads the marker selection state from the non-volatile memory when the engine key is turned on. Therefore, the marker for switching to the working posture is the same as the marker before the engine key was turned off. Therefore, even if the roll exchange is performed by stopping the engine, the selection of the marker is properly maintained, and similarly, it is possible to prevent the marker from drilling a hole in the seat.

Moreover, the control device alternately selects a marker for switching to the working posture each time the working machine is moved up and down with planting, and does not select a marker for switching to the working posture for raising and lowering without planting. Therefore, even if the work machine is lowered on the headland and the seedlings are spliced to the planting device, the work machine is raised again to turn the machine, and the work machine is lowered to carry out the work, the marker is used. The marker can always be swung in the proper direction without making an error in the selection of.

It is a side view of a paper mulch rice transplanter (mulch transplanter). It is a perspective view of a paper mulch rice transplanter. (A) is a plan view showing the periphery of the monitor panel, (b) is a plan view of the switch panel, and (C) is a plan view of the monitor assembly. The laying device is shown, (a) is a side view of a ready state, and (b) is a side view of a working state. It is a side view which shows the mounting state of a roller float and a seat holding roller. It is a side view which shows the linkage state of a cutter lever and a cutter. It is a side view which shows the switching structure of the elevating control valve. It is a side view which shows the mounting state of a lifter cam motor. It is a top view which shows the mounting state of a marker. It is a side view which shows the marker switching part. It is a top view which shows the marker switching part. It is a block diagram of a control device. It is a side view which shows the mounting state of a seat switch. It is a flowchart of quick after bar operation control. It is a flowchart of a marker selection control. It is explanatory drawing of work running.

Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the passenger-type paper mulch rice transplanter 1 constituting the multi-transplanting machine has a planting device 5 constituting a working machine at the rear portion of the traveling machine 4 including the front wheels 2 and the rear wheels 3. The laying device 6 is movably connected by a hydraulic cylinder 8 via a link mechanism 7. Further, the traveling machine body 4 is configured by integrally connecting a chassis frame 9, a transmission case 10, a front axle case 11, a rear axle case 12, and the like, and an engine 13 is mounted on the front portion of the traveling machine body 4, which is mounted on a bonnet. Cover with 14.

Further, a steering column is erected on the chassis frame 9 behind the engine 13, a steering wheel 15 is provided on the upper part of the steering column, and the rear side of the steering column is covered with the rear panel cover 16. The steering column is provided with lever guides for a main shift lever 17, an auxiliary shift lever 18, and an engine control lever 19 for operating a hydrostatic continuously variable transmission (Hydro Static Transmission), and is provided in front of the steering column. Provided a monitor panel 20 including a monitor and various switches.

On the other hand, the chassis frame 9 on the left and right sides of the bonnet 14 is provided with the left and right front steps 21, and the rear steps 22 are provided behind the left and right front steps 21 and the rear panel cover 16. Further, the rear step 22 is raised toward the rear portion, and the driver's seat 23 is provided above the rear step 22, and side steps 22a are provided on the left and right sides of the driver's seat 23 as scaffolds for supplying seedlings to the planting device 5.

Further, on the left and right sides of the traveling machine 4 near the front side, spare seedling stands 24 on which the spare seedlings (mat seedlings) are placed via the mounting frame raised from the chassis frame 9 are provided, and the left and right sides near the rear part are provided. A spare roll stand 26 for supporting the rolled sheet (recycled paper) 25 is provided in the portion. A center pole 27 is provided on the front portion of the chassis frame 9 so as to be rotatable back and forth, and trace markers 28 are provided on the left and right sides of the chassis frame 9.

On the other hand, the planting device 5 will be described. The planting device 5 configured for 6-row planting is a planting frame 29 (see FIG. 5) that is rotatably connected to the rear portion of the link mechanism 7 and a planter attached to the planting frame 29. The seedlings are scraped from the case 30, the apron 31 arranged above the planter case 30 in the left-right direction, the seedling stand 32 moving left and right along the apron 31, and the lower end of the seedling stand 32 with the planting claws 33. It is configured to be equipped with a rotary planting mechanism 34 or the like for planting on the rice field (soil). Further, the power from the engine 13 is transmitted to the planter case 30 and the lateral feed case via an HST (not shown) or an auxiliary transmission built in the transmission case 10 and via a planted PTO shaft, a propeller shaft, and the like.

The power transmitted to the planter case 30 drives the rotary planting mechanism 34, and the power transmitted to the lateral feed case rotationally drives the screw shaft and meshes with the spiral groove of the screw shaft to produce seedlings. A slide block connected to the back surface (front surface) of the mounting table 32 drives the seedling mounting table 32 back and forth. Further, the vertical feed cam provided at one end of the screw shaft drives the vertical feed mechanism of the seedling stand 32 to feed the mat seedlings placed on the seedling stand 32 toward the lower apron 31.

Further, when the laying device 6 is described, the laying device 6 has the left and right spare roll bases 26 for holding the roll-shaped seat 25 described above on the traveling machine body 4, and the cutter is lowered when operated toward the front. A cutter lever 35 for cutting the sheet 25 is provided. Further, on the planting device 5 side, a roll case 36 for storing the rolled sheet 25, a holder 37 for holding the sheet 25 pulled out when the laying device 6 is raised together with the planting device 5, and a sheet 25 are provided. A roller float 38 that presses and detects the unevenness of the rice field surface, a sheet presser roller 39 that also presses the sheet 25, and a cutter 40 that cuts the sheet 25 at the place where planting is completed in each process are provided.

More specifically, the spare roll base 26 holds the spare roll-shaped seat 25 with the two claws 26a and 26b on the traveling machine 4 in the front-rear direction, and operates the lock lever 26c. Then, when the lock with the traveling machine body 4 side is released, the spare roll base 26 can be rotated outward with the boss portion 26d as the center. Further, a roller 26e is provided on the claw 26a of the lower support so that the rolled sheet 25 can be easily inserted into the roll case 36 which is placed on the roller 26e and raised to the highest position.

Further, as shown mainly in FIG. 4, the roll case 36 is attached to the front portion of the planting frame 29 via the left and right brackets 41 so that the cylindrical case body 36a faces in the left-right direction. The left and right ends of the 36a to be opened are closed by a cover 36c that opens and closes with the rear side as a fulcrum 36b. When the rolled sheet 25 is inserted into the case body 36a, the lock is released by the opening / closing lever 36d to open the cover 36c, and the rolled sheet 25 is rolled in any direction from the left or right of the case body 36a. Can be inserted.

On the lower surface side of the case body 36a, four transport rollers 36e interlocked with the vertical movement of the holder 37 are provided, and when the rolled sheet 25 is inserted into the case body 36a, the transport rollers 36e move upward. The lower surface of the rolled sheet 25 can be supported and smoothly inserted into the case body 36a.

Further, when the roll-shaped sheet 25 is inserted into the case body 36a, the cover 36c is closed and locked by the opening / closing lever 36d, the roll core shaft of the sheet 25 is rotatably supported by the left and right covers 36c. It is elastically pinched by the boss of the support shaft. Further, when this boss is rotated by the feeding knob 36f, the end of the seat 25 can be taken out on the guide 36h from the seat outlet 36g formed on the rear surface side of the case body 36a.

Further, the holder 37 has its pipe frame 37a rotatably attached to the lower part of the roll case 36, and a plurality of support rods 37b fixed to the pipe frame 37a pull out the sheet 25 from the roll case 36 on the upper surface thereof. Receive and hold. Further, the holder operating lever 37c rotates the pipe frame 37a and moves the transport roller 36e up and down.

Therefore, when the rolled sheet 25 is inserted into the roll case 36, the holder operating lever 37c is operated in advance to lower the support rod 37b, and the transport roller 36e is moved upward. Further, when the insertion is completed, the support rod 37b is raised and the transport roller 36e is moved downward. The support rod 37b is buried in the soil during the planting operation, and the drawn sheet 25 is placed and held when the working machine is raised.

Then, as shown in FIG. 5, the roller float 38 rotatably supports a pair of front and rear rollers 38a on the left and right plates 38b. Further, the bosses of the left and right plates 38b are fitted onto the pipes 38c arranged in the left-right direction to swing the front and rear rollers 38a. Further, the pipe 38c is rotatably attached to the tips of the left and right arms 38d, and the rear end of the arms 38d is pivotally supported by a pipe 42 provided in the lower part of the planter case 30 for adjusting the planting depth. Then, the roller float 38 configured in this way senses the unevenness of the rice paddy surface by its vertical movement, and presses the sheet 25 with the front and rear rollers 38a to bring the sheet 25 into close contact with the rice field surface.

Further, the seat pressing roller 39 also presses the seat 25 in the same manner as the roller float 38 to bring the seat 25 into close contact with the rice field surface, and the arm 39a rotatably attached to the pipe 42 provided at the lower part of the planter case 30. A roller 39b is rotatably supported at the tip of the roller 39b. It should be noted that four seat pressing rollers 39 are provided in the left-right direction, and four points of the seat 25 are pressed to prevent the seat 25 from being turned over or lifted.

Further, as shown in FIG. 6, the cutter 40 rotatably attaches the left and right arms 40a to the left and right brackets 41 to which the roll case 36 is attached, and also has a saw blade-shaped blade portion 40b attached to the tip of the arm 40a. Detachable attachment. On the other hand, the cutter lever 35 has a grip 35b mounted on the upper portion of the lever body 35a that rotatably supports the traveling machine body 4, a hook 35c is provided in the middle portion, and an inner wire 43 is further provided below the hook 35c. The other end of the inner wire 43 is attached to the base side of the left and right arms 40a of the cutter 40.

Then, when the hook 35c is disengaged from the traveling machine body 4 side and the cutter lever 35 is operated toward the front side, the inner wire 43 is pulled and the cutter 40 moves downward against the return spring 44. Then, the sheet 25 is cut from the rice field surface. When the cutter lever 35 is returned to its original position, the cutter 40 is moved upward by the return spring 44. When traveling on the road or when retracting, cover the cutter 40 (not shown) to prepare for an unexpected accident.

Next, the lifting device of the working machine composed of the planting device 5 and the laying device 6 will be described mainly with reference to FIGS. 7 and 8. As described above, the working machine is hydraulically operated via the link mechanism 7. It is connected to the traveling machine body 4 so as to be able to move up and down by the cylinder 8. Further, a quick-up lever 45 that can rotate back and forth and up and down, which constitutes an elevating operation tool, is provided on the steering column below the steering wheel 15 (see FIG. 3). Further, the hydraulic pump that supplies the pressure oil to the hydraulic cylinder 8 is attached to the front side of the transmission case 10 and is constantly driven by the engine 13.

Further, the hydraulic oil sucked by the hydraulic pump from the transmission case 10 that also serves as the hydraulic oil tank is guided to the elevating control valve 47 via the hose 46, and the elevating control valve 47 is the chassis frame 9 below the driver's seat 23. Attach to the via bracket. Further, piping is performed from the elevating control valve 47 to the hydraulic cylinder 8 attached between the link mechanism 7 and the chassis frame 9 via a hose.

Further, the elevating control valve 47 is composed of a rotary type switching valve that rotates the spool to switch the oil flow direction, and is divided into a manual part and an automatic part according to the operating angle of the spool. Of these, the manual part is a fixed position that supplies the pressure oil from the hydraulic pump to the hydraulic cylinder 8 and guides the pressure oil from the hydraulic pump to the hydraulic oil tank side to stop the flow from the hydraulic cylinder 8 to the hydraulic oil tank. It has a position and a lowering position that guides the pressure oil from the hydraulic pump and the oil of the hydraulic cylinder 8 to the hydraulic oil tank side.

On the other hand, the automatic part of the elevating control valve 47 has a part of the lowering position of the manual part, an underlap position where the pressure oil from the hydraulic pump flows to the hydraulic cylinder 8 and the hydraulic oil tank side, and the pressure oil from the hydraulic pump. There is a rising position to supply the hydraulic cylinder 8. Further, a stop valve is integrally provided on the valve body of the elevating control valve 47, and this stop valve is interposed in an oil passage between the elevating control valve 47 and the hydraulic cylinder 8 to form a hydraulic fixing lever 48. The oil flow between the two can be blocked by the closing operation.

Further, as shown in FIG. 7, a valve arm 49 is provided on the spool of the elevating control valve 47, and a lifter cam 50 and an operation arm 51 that engage with one pin 49a and the other pin 49b provided on the valve arm 49, respectively. Switches the spool of the elevating control valve 47 to each position of the manual part and the automatic part. Then, the lifter cam 50 rotatably supported in the vicinity of the valve arm 49 is rotated by the lifter cam motor 52 configured by the electric motor to switch the manual portion of the elevating control valve 47, and the lifter cam 50 is used. The clutch arm 53 that comes into contact with the clutch arm 53 is operated, and the clutch arm 53 engages and disengages a planting clutch (not shown) that is interposed in the transmission path from the engine 13 to the planting device 5.

Further, the operation arm 51 axially supported on the same core as the valve arm 49 is connected to the arm 38d of the roller float 38 via the link mechanism 54, and the operation arm 51 is interlocked with the vertical movement of the tip side of the arm 38d. Rotate. A tension spring 55 is erected between the middle part of the link mechanism 54 and the pin 49b projecting from the valve arm 49, and the valve arm 49 is always attached to the operation arm 51 side by the tension spring 55. Momentum. Therefore, when the valve arm 49 is rotatable, the pin 49b of the valve arm 49 comes into contact with the operation arm 51, and the valve arm 49 and the operation arm 51 rotate integrally.

Therefore, when the lifter cam 50 is rotated to the raised position by the lifter cam motor 52, the lifter cam 50 pushes one of the pins 49a provided on the valve arm 49 (rotated counterclockwise) to raise and lower the valve. 47 switches to the ascending position. In that case, the other pin 49b provided on the valve arm 49 is separated from the operation arm 51 against the urging force of the tension spring 55. Further, when the lifter cam 50 is returned to the fixed position (rotated clockwise), the valve arm 49 follows the lifter cam 50 by the urging force of the tension spring 55, and the elevating control valve 47 switches to the fixed position.

Further, when the lifter cam 50 is rotated to the lowered position (rotated clockwise), the lifter cam 50 is disengaged from one of the pins 49a provided on the valve arm 49, and the valve arm 49 is rotatable. The valve arm 49 is rotated by the urging force of the tension spring 55 until the other pin 49b provided on the valve arm 49 comes into contact with the operation arm 51, and the elevating control valve 47 is switched to the descending position. After that, the valve arm 49 and the operation arm 51 rotate integrally, and the elevating control valve 47 is controlled by the automatic unit.

That is, when the working machine is not grounded in the automatic section, the roller float 38 moves downward and the elevating control valve 47 switches to the lowering position of the automatic section following the lowering position of the manual section, and the working machine lowers. When the work equipment touches the ground, the roller float 38 moves upward and the elevating control valve 47 switches to the underlap position, and the work equipment moves up and down according to the unevenness of the ground contact surface. Further, when a large earth pressure is applied to the roller float 38 and the roller float 38 moves upward, the elevating control valve 47 switches to the ascending position of the automatic part, and the working machine ascends.

When the lifter cam 50 is further rotated (rotated clockwise) from the lowered position to the planting position, the lifter cam 50 presses the clutch arm 53 to engage the planting clutch. Further, when the lifter cam 50 is in the other lowering position, fixed position, and raising position, the planting clutch is disengaged.

Next, in order to properly maintain the space between the adjacent rows with the seedlings planted in the previous step, a marker that marks the soil surface as a mark when performing the work run in the next step will be described. As shown in 9, rotary wind turbine type markers 56L and 56R are provided on both the left and right sides of the planting device 5. That is, the left and right markers 56L and 56R are attached to the planting frame 29 so as to be rotatable and transformable into an action posture of swinging to the left and right sides and a storage posture of standing along the side of the planting device 5. The spring 57 urges the user to take an acting posture.

On the other hand, the chassis frame 9 of the traveling machine body 4 is provided with a marker switching portion as shown in FIGS. 10 and 11, and a pair of left and right plates 59 provided near the rear portion of the base plate 58 of the marker switching portion are provided. The marker operating arms 60L and 60R are rotatably supported via the fulcrum pin 61, and the marker operating arms 60L and 60R and the base ends of the markers 56L and 56R are connected via the inner wires 62L and 62R, respectively. .. Further, a roller arm 64 including a roller 63 is rotatably supported on the left plate 59 via a fulcrum pin 65. Further, the roller arm 64 is connected to the base of the link mechanism 7 via the rod 66.

Therefore, when the working machine is moved up and down by the hydraulic cylinder 8 via the elevating link mechanism 7, when the working machine is raised, the roller arm 64 rotates in the same counterclockwise direction by the counterclockwise rotation of the link mechanism 7. As a result, the roller 63 comes into contact with the marker actuating arms 60L and 60R toward the rear, and rotates the marker actuating arms 60L and 60R clockwise. Therefore, the inner wires 62L and 62R are pulled, and the left and right markers 56L and 56R are in the retracted posture.

Further, when the working machine is lowered, the roller arm 64 rotates in the same clockwise direction due to the clockwise rotation of the link mechanism 7, and the roller 63 retracts to the rear side. Therefore, the marker operating arms 60L and 60R are counterclockwise. The counterclockwise rotation becomes possible, and the inner wires 62L and 62R are loosened, so that the left and right markers 56L and 56R are allowed to operate in the acting posture. However, when the marker actuating arms 60L and 60R are restricted from rotating counterclockwise by the stopper described below, the markers 56L and 56R are held in the retracted posture.

That is, a pair of left and right stoppers 68L and 68R are rotatably supported on the U-shaped plate 67 rising from the base plate 58 via the fulcrum pin 69, and the stoppers 68L and 68R are attached to the fulcrum pin 69. The fulcrum springs 70L and 70R are urged clockwise. Further, an electric marker motor 71 and a marker rotary switch 72 are provided on the lower surface of the base plate 58, and a marker switching lever 74 in the left-right direction is fixed to the output shaft 73 of the marker motor 71 protruding from the hole of the base plate 58. Then, through the holes at both ends of the marker switching lever 74 sandwiching the output shaft 73, the tips of the left and right rods 75L and 75R connecting the rear ends to the stoppers 68L and 68R are passed through, and the double nuts 76L and 76R are used to prevent them from coming off. do.

Then, when the marker motor 71 puts the marker switching lever 74 in the neutral position in the left-right direction, the left and right rods 75L and 75R are allowed to move back and forth, and the left and right stoppers 68L and 68R are urged by the torsion springs 70L and 70R. , The lower portions of the stoppers 68L and 68R rotate clockwise until they hit the base plate 58, and the regulated position stands up upward.

Further, when the left and right stoppers 68L and 68R are in the restricted positions in this way, even if the marker operating arms 60L and 60R can be rotated counterclockwise, the restricting pins 77L provided on the marker operating arms 60L and 60R, respectively, The 77R abuts on the left and right stoppers 68L and 68R to regulate counterclockwise rotation, and holds the markers 56L and 56R in the retracted posture.

On the other hand, when the marker switching lever 74 is rotated clockwise by the marker motor 71 to take the left marker release posture, the double nut 76L hits the left end of the marker switching lever 74 and the left rod 75L is pulled forward and left. The stopper 68L is in the release position where it rotates counterclockwise and falls forward. Then, when the left stopper 68L is in the release position in this way, when the left marker operating arm 60L can be rotated counterclockwise, the left regulation pin 77L does not abut on the left stopper 68L and therefore rotates as it is on the left side. Marker 56L is the acting posture.

On the contrary, when the marker switching lever 74 is rotated counterclockwise by the marker motor 71 to take the right marker release posture, the double nut 76R hits the right end of the marker switching lever 74 and the right rod 75R is pulled forward. , The right stopper 68R is in the release position where it rotates counterclockwise and falls forward. Then, when the right stopper 68R is in the release position in this way, when the right marker operating arm 60R can rotate counterclockwise, the right regulation pin 77R does not abut on the right stopper 68R, so that the right stopper 68R rotates as it is on the right side. Marker 56R is the acting posture.

Next, the control device that controls the elevating and lowering of the working machine and the marker control will be described. The control device is mainly composed of an electronic control unit (Electronic Control Unit) including a microcomputer or the like. Further, as shown in the block diagram of FIG. 12, in the ECU 78, when the ignition switch 79 that is turned on and off by the engine key K is turned on, the power supply from the battery 80 passes through the power supply circuit 81 having the self-holding circuit and the power supply line 82. Is supplied.

Further, the ECU 78 executes the software in the flash memory (Flash Memory) and writes the backup data stored in the EEPROM (Electrically Erasable Programmable Read-Only Memory) constituting the non-volatile memory into the RAM (Random Access Memory). After that, elevating control and marker control are executed. Further, when the engine key K is turned off, the marker control data is written to the EEPROM to be used as backup data, and then the self-holding is released and the engine is shut down.

Then, the ECU 78 detects the amount of elevation of the work equipment by the operating angle of the planting switch 83, the up / down switch 84 that detects the up / down operation of the quick-up lever 45, and the link mechanism 7 that are operated by entering the input circuit during work. Lift angle potentiometer 85, lifter cam potentiometer 86 that detects the rotation angle of the lifter cam 50, front / rear switch 87 that detects the front / rear operation of the quick-up lever 45, marker rotary switch 72 that detects the position of the marker switching lever 74, marker A marker switch 88 for switching modes and a seat switch 89 (see FIG. 13) for detecting the presence or absence of the seat 25 are connected.

Further, the lifter cam motor 52 and the marker motor 71 are connected to the output circuit of the ECU 78 via a relay, and the planting monitor 90, the alarm buzzer 91, and the paper replenishment monitor 92 are connected. Then, the ECU 78 executes programs such as raising / lowering control of the working machine and marker control based on the input signal and backup data. Further, the elevating control of the working machine executes quick-up lever operation control and output control thereof in order to control the rotation angle of the lifter cam 50 to switch the elevating control valve 47.

Then, the quick-up lever operation control mainly sets a new hydraulic state (rotation angle: position of the lifter cam 50) based on the planting switch 83, the raise / lower switch 84 of the quick-up lever 45, and the current hydraulic state. Set.

Hereinafter, the quick-up lever operation control will be briefly described together with the raising and lowering operation of the work machine. As shown in the flowchart of FIG. 14, when the planting switch 83 is turned off (when not working), the quick-up lever 45 is raised. When operated once in the direction, the position of the lifter cam 50 is set to be raised (hydraulic: raised, the work equipment is raised). Further, when the quick-up lever 45 is operated once downward, the position of the lifter cam 50 is set to lower (flood control: lower, the work equipment is lowered).

Further, when the quick-up lever 45 is operated once downward while the work machine is ascending, the position of the lifter cam 50 is set to be fixed (flood control: fixed, the work machine stops at that position). On the contrary, when the quick-up lever 45 is operated once in the upward direction while the work machine is descending, the position of the lifter cam 50 is set to be fixed (flood control: fixed, the work machine stops at that position).

On the other hand, when the planting switch 83 is switched on by the operator (during work), when the quick-up lever 45 is operated twice downward, the position of the lifter cam 50 is set to be lowered by the first operation (during work). Flood control: Lower, work equipment lowers) Set to planting in the second operation (Flood control: Planting, planting clutch is engaged). Also, when the quick-up lever 45 is operated twice upward, the position of the lifter cam 50 is set to lower in the first operation (flood control: lower, the planting clutch is disengaged), and the position of the lifter cam 50 is raised in the second operation. Set (Flood control: rise, work equipment rises).

Further, when the planting clutch is engaged, the quick-up lever 45 is operated once in the upward direction to set the position of the lifter cam 50 to the lower position (hydraulic: lower, the planting clutch is disengaged). Further, when the quick-up lever 45 is operated upward in this state, the position of the lifter cam 50 is set to rise (flood control: rise, the work equipment rises). Conversely, when the quick-up lever 45 is operated downward, the position of the lifter cam 50 is set to planting (hydraulic: planting, planting clutch is engaged).

If the quick-up lever 45 is operated downward when the planting clutch is disengaged while the work equipment is in contact with the ground, the position of the lifter cam 50 is set to planting (hydraulic: planting, planting clutch is released). Enter). Then, as in the case where the planting switch 83 is turned off (when not working), when the quick-up lever 45 is operated once downward while the working machine is rising, the position of the lifter cam 50 is set to be fixed (flood control). : Fixed, the work equipment stops at that position). On the contrary, when the quick-up lever 45 is operated once in the upward direction while the work machine is descending, the position of the lifter cam 50 is set to be fixed (flood control: fixed, the work machine stops at that position).

Although the quick-up lever operation control has been described above, when the quick-up lever operation control is restored, the ECU 78 performs the output control thereof, and although detailed description of this output control is omitted, the above-mentioned vertical operation of the quick-up lever 45 is performed. Output to the lifter cam motor 52 so that the work equipment is actually lifted and lowered based on the above, and the rotation angle of the lifter cam 50 is adjusted by using the lifter cam potentiometer 86 so that the lift control valve 47 matches each switching position. Control.

On the other hand, the ECU 78 also executes the marker control in parallel, and this marker control controls the operation of the left and right markers 56L and 56R that mark the soil surface as a mark when the work run of the next process is performed. When reciprocating planting, the markers that should be switched to the working posture on the outbound and inbound routes are reversed left and right, and this is repeated during the reciprocating planting. To be able to do it automatically.

Therefore, the marker control is a marker selection control that determines which of the left and right markers is to be in the working posture according to the ascending / descending of the working machine, and the marker selected by the marker selection control is used as the ascending / descending timing of the working machine. In addition, it is equipped with a marker operation control that actually sets the working posture. Then, here, the former marker selection control will be described, and the latter marker operation control will be omitted.

Hereinafter, the marker selection control will be described together with the raising and lowering operation of the work machine. As shown in the flowchart of FIG. 15, the operation state of the planting switch 83 is first determined (step S1), and the planting switch 83 is turned on by the operator. When the switch is made (ON: during work), it is determined by using the lift angle potentiometer 85 whether the work machine is descending (step S2). If it is not descending here, the double drop operation timer is set (step S3), and it is determined by the lift angle potentiometer 85 whether the working machine is at the highest position (step S4).

Then, when the working machine is at the highest position, the state of the auto marker flag based on the marker switch 88 is determined (step S5). For example, if the marker switch 88 is operated to be automatic, the initial setting is ". Check the state of the planted clutch flag that has been set (step S6). Here, if the planting clutch flag is set, the presence or absence of the seat 25 to be pulled out from the seat pull-out port 36 g of the roll case 36 onto the guide 36h is determined from the detection result of the seat switch 89 provided above the seat 25 (step S7). ).

Here, if the seat 25 is present and the switch is off, the state of the replenishment flag is determined (step S8), but the replenishment flag is set in step S9 when the seat 25 disappears and the switch is turned on. In addition, since it is one item of backup data to be written to the non-volatile memory before the ECU 78 shuts down, in the initial set to be executed first after the ECU 78 starts up, it is already read from the non-volatile memory and written to the RAM. There is.

Therefore, the state of the replenishment flag is set in the initial setting before starting the marker selection control, and if the replenishment flag is set in the initial setting, the first item of the backup data is read into the replenishment flag. Also, if the swing direction described below is selected as right swing or left swing in the initial setting, the second item of backup data to be written to the non-volatile memory is similarly read in the swing direction. Means that.

Further, to be described continuously, if the replenishment flag is reset in step S8, the state in the swing direction is determined (step S7). There are three types of flags for the swing direction: right swing, left swing, and reset with indefinite swing. Of these, the right swing is a marker that sets the working posture when the work machine descends to plant seedlings. It means to select the marker 56R on the right side, and the left swing also means to select the marker to be in the working posture when the working machine descends for planting seedlings on the marker 56L on the left side, and the reset means to select it. It means that both the left and right markers 56L and 56R are held in the retracted posture.

Then, if this swing direction is reset, the swing direction is set to the right swing (step S11), and if it is set to a right swing or a left swing other than the reset, this state is reversed, and for example, it is set to the right swing. If it is set to the left swing, it is set to the left swing, and if it is set to the left swing, it is set to the right swing (step S12).

Next, when the automatic is turned off (OFF) in steps S11, S12, and S5, when the planting clutch flag is reset in step 6, and when the replenishment flag is set in step S8, And when step S9 is executed, the planting clutch flag is reset (step S13), and whether or not the quick-up lever 45 has been operated forward (left swing instruction) is determined by the front / rear switch 87 (step). S14).

Here, if the quick-up lever 45 is operated forward, the swing direction is determined (step S15), and if the swing direction is already left swing, nothing is done, but if it is other than the left swing, the swing direction is determined. Is set to the left swing (step S16), and the auto marker flag is automatically turned on (step S17). Further, if there is no forward operation of the quick-up lever 45 and there is a backward operation (right swing instruction) (step S18), the swing direction is similarly determined (step S19), and the swing direction is already swung to the right. If it is, nothing is done, but if it is not right swing, the swing direction is set to right swing (step S20), and the auto marker flag is automatically turned on (step S21).

Further, it is determined whether or not the marker switch 88 is operated (step S22), and if the marker switch 88 is pressed, the state of the auto marker flag is determined (step S23). When it is turned on (step S24), it returns, and if automatic is turned on, the swing direction is reset (step S25), and the auto marker flag is automatically turned off (step S26) to return. If the marker switch 88 is not pressed in step S22, the process returns as it is, and if the work machine is not raised to the maximum in step S4, the process returns as it is.

On the other hand, if the working machine is lowered in step S2, the state of the planting clutch is determined by the lifter cam potentiometer 86 (step S27), and if the planting clutch is disengaged, it returns as it is, but the planting clutch is engaged. If so, the planting clutch flag is set (step S28), and the replenishment flag is reset (step S29). Further, the state of the double drop operation timer is determined (step S30), and if the time is up, the timer returns as it is, but if the time is up, the quick-up lever 45 is operated forward (left swing instruction) as in step 14. ) Was found (step S31).

Further, the subsequent processing from step S32 to step S36 is the same as the steps S15, S16, and S18 to S20 already described, and thus the description thereof will be omitted. Then, when returning from the marker selection control described above, the ECU 78 swings out when the working machine descends and performs the planting work as described in step S7 above based on the swinging direction set in the marker selection control. If the direction is right swing, the right marker 56R is set to the working posture, if the swing direction is left swing, the left marker 56L is set to the working posture, or if the swing direction is reset, the left and right markers 56L and 56R are stored together. Executes marker operation control to hold the posture.

In the marker operation control, the control for setting the markers 56L and 56R to the working posture or the retracting posture is performed by controlling the rotating posture of the marker switching lever 74 based on the forward / reverse drive of the marker motor 71 as described above. When the marker switching lever 74 is set to the neutral posture based on the detection of the marker rotary switch 72, the left and right markers 56L and 56R both hold the retracted posture when the work equipment is lowered from the most raised state. Further, when the marker switching lever 74 is set to the right marker release posture or the left marker release posture based on the detection of the marker rotary switch 72, of the left and right markers 56L and 56R when the work equipment is lowered from the most raised state. , The corresponding marker is released from the restricted state and becomes the working posture.

The elevating control and marker control of the work equipment executed by the control device have been described above, but as already explained, when the engine key K is entered and started, the ECU 78 is stored in the non-volatile memory in its initial set. The backup data is read, and the replenishment flag and the swing direction to be used especially in the marker selection are initially set, and then the elevating control and the marker control are performed in parallel and repeatedly executed.

Further, when the ECU 78 detects that the engine key K is turned off and the voltage from the ignition switch 79 has dropped by an interrupt, the self-holding of the power supply circuit 81 is released unless the replenishment flag of the marker selection control is set. Shut down as it is. However, if the replenishment flag is set, the replenishment flag and the drawing direction are written to the non-volatile memory as backup data, and then the data is shut down.

Next, the work method for reciprocally planting seedlings using the paper mulch rice transplanter 1 described above will be described with particular focus on the characteristic portion of the present invention. As shown in FIG. 16, the paper mulch rice transplanter is used for rice fields. When the work is first carried out from right to left with 1 inserted, the paper multi-rice transplanter 1 is moved with the work machine raised, and the work machine keeps a distance between the predetermined headland and the ridge on the right side. And let it face the work start position. Then, the planting switch 83 is turned on, and the marker is swung to the left by operating the quick-up lever 45 forward (this sets the auto marker flag to be automatically turned on).

When the above preparations are completed, operate the quick-up lever 45 downward twice (lower the work machine and engage the planting clutch), and move the right trace marker 28 etc. so that the work machine does not hit the ridges. Use to drive forward. In that case, the marker 56L on the left side becomes the acting posture and makes a mark M on the soil surface on the left side. Then, when the headland at the end is reached, the quick-up lever 45 is operated upward twice (disengages the planting clutch and raises the working machine), and the steering wheel 15 turns left toward the next stroke.

In this case, as the work equipment rises, the marker 56L on the left side is in the retracted posture, and the control device reverses the swing direction to swing to the right. Also, when the start position of the next stroke is reached, the quick-up lever 45 is operated downward twice in the same manner (lowering the work equipment and engaging the planting clutch), and from the driver's seat 23 to the center pole 27 and the previous stroke. Work while manipulating so that the traces M of the soil surface attached in step 1 overlap.

Then, the space between the adjacent rows of the seedlings planted in the previous process and this time is kept at an appropriate distance, and the wrapping allowance of the sheet 25 to be laid on the soil surface is also kept properly, and a gap is created between the two, or the seedlings are laid this time. Sheet 25 does not overthrow the seedlings planted in the previous step. Furthermore, although there are differences depending on the skill, when the marks M attached by the markers 56L and 56R are steered as a mark, they are less likely to meander, and the sheet 25 to be laid does not twist and rise or tear, and is manually operated. Repair work can be eliminated.

In addition, since the marker 56R on the right side automatically takes the action posture this time and makes a mark M on the soil surface on the right side, the operator can omit the operation of selecting the left and right markers 56L and 56R at the start of this work. , You can work efficiently with less complicated operations. After that, the work is carried out by repeating such reciprocating planting, but there is a case where the seedlings are lost in the planting device 5 and the spare seedling stand 24 and the seedling succession work is performed.

In that case, after performing one stroke of work, the vehicle travels close to the ridges and stops, and the mat seedlings are replenished to the spare seedling stand 24 from the ridge side. Further, when adding seedlings to the seedling mounting table 32, the working machine is lowered. Then, when the seedling succession work is completed, the work machine is raised again to turn the machine body, and when the start position of the next process is reached, the quick-up lever 45 is similarly operated downward twice to resume the work run.

In this case, the work machine is raised and lowered once while the work machine is raised for one stroke and the work machine is moved to the vicinity of the ridge and stopped, and the work machine is lowered to the seedling stand 32. The second raising and lowering of the working machine is performed while the seedlings are added and the working machine is raised and turned. Therefore, if the control device reverses the swing direction of the marker twice in accordance with this, the marker on the same side as the previous time is selected in the next stroke, and an error occurs in the selection of the marker.

However, in the seedling work, the planting clutch is not engaged even if the work equipment is lowered, and the control device monitors this state with the planting clutch flag (reset), and in this case, the marker's swing direction is reversed. Do not do. Therefore, in the next process, the marker on the opposite side to the previous one is selected, and the marker can be swung in an appropriate direction.

In addition, the roll may be used up several times while the work is being carried out in one paddy field. In this case, there is not much problem if the rolls are replaced at a headland or the like as soon as possible by checking the remaining condition of the sheet 25 in advance. However, since the sheet as a laying material is relatively expensive, it is necessary to replace all the sheets after using up all the sheets. Therefore, if the sheet 25 runs out in the middle of the planting process (laying process), the work running is started. Suspend and replace the roll.

In that case, after raising the work machine, the worker descends to the side where the seedlings are planted in the next step opposite to the side where the seedlings were planted in the previous step, and rotates the spare roll table 26 provided on that side. , The spare roll held on the spare roll base 26 is inserted into the roll case 36 facing in a straight line and inserted. After the roll replacement is completed, the work is advanced to the end of the sheet 25 that has already been laid, and the work machine is lowered so that the end of the sheet and the start end of the newly laid sheet overlap with each other by about 15 to 20 cm, and the work running is resumed. do.

In this case, by raising the working machine that had been working by lowering it for roll exchange, the working machine was raised and lowered once, and the control device normally moves the marker in the swinging direction. When the work is reversed and the work is resumed, the marker opposite to the swing direction of the marker before the interruption descends to a substantially intermediate position of the sheet 25 laid in the previous stroke, and the tip pierces the sheet 25 to make a hole.

Further, if the work continues without noticing this, the holes will be continuously linear or holes will be opened intermittently, and a separate repair work for closing the holes will be required. In addition, the marker may push down the seedlings that have already been planted, resulting in a stock shortage. Moreover, as a matter of course, it is not possible to make a mark M on the soil surface as a mark in the next process.

However, even if the control device detects that the seat 25 has disappeared by the seat switch 89 provided in the laying device 6, the replenishment flag is set, and then the roll exchange is completed and the seat switch 89 detects the presence of the seat 25. , The state of the flag is maintained until the work running when the work machine is lowered and the planting clutch is engaged. Then, while the replenishment flag is set, the marker's swing direction is not automatically reversed except for a manual operation. Therefore, when the work running is restarted, the same marker as before the interruption can be put in the working posture, and the above-mentioned trouble can be prevented.

It is assumed that when the work run of one stroke is completed, the seat 25 happens to disappear at the same time and the roll is replaced at the headland. In that case, if the control device does not automatically reverse the direction in which the marker is drawn as described above, the wrong marker will be drawn when the next stroke is performed after turning after the roll exchange is completed. Be told. Therefore, in this case, the swing direction of the marker is changed by operating the quick-up lever 45 in the front-rear direction before the work running (manual change of the swing direction is guaranteed even when the replenishment flag is set).

Further, when the roll is replaced, the engine 13 may be stopped to perform the replacement work. In that case, the power supply to the control device is stopped when the engine 13 is stopped, and the replenishment flag and the control data in the swing direction stored in the RAM are lost. However, in this case, the control device writes the current marker selection state to the non-volatile memory, and when the engine key K is entered, reads the marker selection state from the non-volatile memory and sets the marker to the working posture. Since the marker is configured to be the same as before the key was cut, erroneous selection of the marker does not occur.

The marker that switches to the working posture based on the fact that the control device writes the replenishment flag and the control data of the swing direction at the time of the roll exchange, shuts down, and then turns on the engine key K again to perform the roll exchange. If is set to the same marker as before the engine key is turned off, the control device rewrites the backup data such as "replenishment flag: reset" and "swing direction: reset" in the non-volatile memory before executing the marker control or the like. This eliminates the need to write to the non-volatile memory at the time of normal termination.

Further, the on / off state of the planting switch 83 is displayed on the planting monitor 90, the sheet 25 cut based on the sheet switch 89 is displayed on the paper replenishment monitor 92, and the selected state of the left and right markers 56L and 56R is displayed on the monitor panel 20. Since the lamps 93L and 93R provided are used for display, the operator can easily grasp the work status and operate the switch by referring to these displays.

Although the embodiment of the present invention has been described above, the left and right markers 56L and 56R may be of a line drawing type instead of the rotary wind turbine type of the embodiment, and the operation of the markers to the retracted posture may be performed by the hydraulic cylinder 8. However, the marker may be operated in the retracted posture and the operating posture by one electric motor or by another actuator such as a hydraulic cylinder. Further, if the replenishment flag and the drawing direction are written in the RAM for battery backup, it is not necessary to provide the power supply circuit 81 or the like provided with the writing to the non-volatile memory or the self-holding circuit. It is not limited.

1 Paper mulch rice transplanter (mulch transplanter)
4 Traveling machine 5 Planting device 6 Laying device 26 Spare roll stand 45 Quick-up lever 56L Left marker 56R Right marker
78 ECU (electronic control unit)
83 Planting switch 88 Marker switch 89 Seat switch K Engine key

Claims (4)

A work machine equipped with a sheet laying device and a seedling planting device is provided on the traveling machine so as to be able to move up and down, and the work machine is raised to supply roll-shaped sheets to the laying device from a spare roll stand provided on the traveling machine. , The control device is provided with a seat switch for detecting the presence or absence of a seat in the laying device in a multi-transplanting machine that runs while working with a mark on the soil surface as a mark on either the left or right marker that switches to the working posture by the control device. The device alternately selects a marker that switches to the working posture each time the work machine is lifted or lowered, and when the work running is interrupted and the work machine is lifted or lowered, the laying device has a seat to raise the work machine. In that case, select a marker to switch to the working posture, and when the work machine is lowered next time, the marker different from that before raising the work machine is set to the working posture, while the seat disappears in the laying device and the work machine When the work machine is raised, the marker for switching to the working posture is not selected, and when the working machine is lowered next time, the same marker as before the working machine is raised is set to the working posture. Machine. The multi-transplanting machine according to claim 1, wherein the control device sets a marker for switching to the working posture as the designated marker when a marker for switching to the working posture is designated by an artificial operation. The control device writes the current marker selection state to the non-volatile memory when the laying device runs out of seats and the engine key is turned off, and reads the marker selection state from the non-volatile memory when the engine key is turned on. The multi-porting machine according to claim 1 or 2, wherein the marker for switching to the working posture is the same as the marker before the engine key is turned off. The claim is characterized in that the control device alternately selects a marker for switching to the working posture each time the working machine is moved up and down with planting, and does not select a marker for switching to the working posture for raising and lowering without planting. The multi-transplant machine according to any one of claims 1 to 3.

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