JP6733113B2 - Multi transplanter - Google Patents

Description

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

When growing crops, multi-cultivation is performed in which the soil surface is covered with multi-materials. Even in the cultivation of paddy rice, rice is planted at the same time while laying roll-shaped recycled paper on the rice field (soil surface). A riding-type rice transplanter has been developed. It is expected that if rice planting is performed using this rice transplanter, labor-saving cultivation of organic rice and reduced-pesticide rice can be performed without the need for herbicides and weeding work.

Since most of the recycled paper mulch blocks the sun's rays, the germination of the seeds of the weeds on the lower surface is suppressed, and even if it germinates, it cannot grow because it cannot photosynthesis. Alternatively, the sheet physically suppresses the growth even if it germinates. Further, since the recycled paper is on the soil surface, it is said that the oxygen concentration in the soil is reduced and the germination and growth of weed seeds are suppressed.

In addition, such a multi-transplanter (paper multi-rice transplanter) is a planting device for planting seedlings in order to lay a roll-shaped sheet (multi-material, specifically recycled paper) on the soil surface. A roll case that constitutes the laying device is provided in front of, and the roll-shaped sheet set on the roll case is pulled out by a predetermined amount onto the sheet holder. Further, the drawn sheet is brought into close contact with the soil surface by a roller float or a pressing roller as the transplanting machine runs, and thereafter, the sheet is 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 that is in close contact with the soil surface. In addition, when the planting of one stroke is performed and the headland is reached, the transplanting machine is swung to the next stroke, but the working machine configured by the laying device and the planting device is swung against the traveling machine body for turning. When it is raised, the end side of the sheet that is in close contact with the soil surface is lifted, and the seedling already planted in the soil is pulled out together with the sheet or the sheet collapses the seedling. Alternatively, the sheet is torn and disturbs the boundary in the headland.

Therefore, when raising the working machine to reach a headland etc., first cut the end of the sheet that is in close contact with the soil surface with a cutter, and then raise the working machine, so that the sheet does not follow. , Rotate the transplanter toward the next step to plant seedlings. In this case, the cutter is manually operated by operating a lever provided beside the driver's seat (see Patent Document 1).

JP-A-6-141703

As mentioned above, in the multi-transplanter (paper multi-rice transplanter), when raising the working machine to reach the headland etc., operate the lever provided beside the driver's seat to remove the end of the sheet that is in close contact with the soil surface. Need to cut with a cutter. However, when using the multi-transplanter for the first time, even if a skilled person does not know the necessity of this cutter operation, and even a skilled person rushes to plant seedlings, he forgets the sheet cutting operation and raises the working machine to rotate it as it is. There are often times.

In that case, the terminal end side of the sheet brought into close contact with the soil surface is lifted, and the seedlings already planted in the soil are pulled out together with the sheet or the sheet falls down the seedlings. Alternatively, the sheet is torn and disturbs the boundary in the headland. Therefore, it is necessary to separately cut the lifted sheet with a cutter and remove it, and then perform planting work again, or to re-roll the sheet and replant the seedlings manually. Will also require extra effort.

If an extra sheet remains on the soil surface, when a new sheet is stacked on the soil sheet and the planting operation is performed, the extra sheet may be caught in a sheet holder or the like and a clean sheet may not be laid. In addition, when performing the planting work on the headland, the end portion of the row-planted sheet is trimmed and removed at a position where it can be planted in one round trip of the headland, or when the planting work is redone, the already laid sheet is removed. After removal, it is necessary to carry out planting work.

Therefore, in view of the above problems, the present invention is a multi-transplanter for planting seedlings while laying a roll-shaped sheet on the soil surface, and planting a laying device for turning or the like. An object of the present invention is to provide a multi-transplanter capable of preventing the end side of a sheet from being lifted or the sheet from being torn when the apparatus is raised together with the apparatus.

MEANS TO SOLVE THE PROBLEM 1stly, in order to solve the said subject, this invention is the working machine provided with the laying apparatus which pulls out the sheet|seat made into the roll shape, and covers the soil surface, and the planting apparatus which plant|plants seedlings in the soil from above a sheet|seat, It is connected to a traveling machine equipped with front wheels and rear wheels so that it can move up and down, and at the end of this seedling planting work, the sheet that has been pulled out is cut by a cutter, and the control unit controls the work machine to move up and down based on an artificial command. In the transplanter, the control device is an artificial work machine when the sheet is not cut by the cutter after the planting work for the predetermined distance or more after the planting work for the predetermined distance or more has been performed since the start of the most recent planting work. It is characterized in that it is configured so that the working machine is not raised even when a raising command is issued .

Further, the present invention is secondly characterized in that, when the control device does not raise the work implement irrespective of an artificial raising command of the work implement, the control device notifies the operator of this.

Furthermore, the present invention is the third, the controller, in a state of being made to planting of a predetermined distance or more from the last planting work start, since the sheet is cut by the predetermined distance or more planting after the cutter If elevated command manual operation machine was issued, characterized in that configured to perform the increase of the working machine.

Then, in a fourth aspect of the present invention, the control device manually performs a planting operation for a predetermined distance or more from the start of the most recent planting operation, without cutting the sheet by the cutter after the planting operation for the predetermined distance or more. When the sheet is cut by the cutter after the working machine is not lifted and the sheet is cut by the cutter, the working machine is automatically lifted.

According to the first aspect of the present invention, since the working machine does not rise when the cutting of the sheet is forgotten by the cutter , it is possible to prevent the seedling from being pulled out and lifted together with the sheet, and the sheet does not collapse the seedling.

Further , according to claim 2 of the present invention, when the control device does not raise the work implement regardless of an artificial raising command of the work implement , the control device notifies the worker of this and the worker is notified It is possible to restart the planting work of seedlings, noticing that it does not rise or notifying that the cutter has not cut the sheet by this notification, cutting the sheet promptly and taking appropriate measures without causing confusion. it can.

Furthermore, according to claim 3 of the present invention , after recognizing that the sheet has not been cut, after cutting the sheet, the lifting operation is performed again to raise the working machine, and the transplanting machine is rotated. Work can be continued. Further, since the control device does not raise the working machine after waiting for the cutting of the sheet, the working machine does not rise at an unexpected timing, and the work can be performed safely.

Further , according to the fourth aspect of the present invention , after the sheet is cut, the working machine rises without performing the raising operation of the working machine again, so that the work can be resumed promptly.

It is a side view of a paper multi rice transplanter (multi transplanter). It is a perspective view of a paper multi rice transplanter. It is a top view showing the circumference of a meter panel. The laying apparatus is shown, (a) is a side view of a ready state, (b) is a side view of a working state. FIG. 6 is a side view showing a mounting state of a roller float and a sheet pressing roller. It is a side view which shows the cooperation state of a cutter lever and a cutter. It is a side view which shows the switching structure of a raising/lowering control valve. It is a side view which shows the attachment state of a lifter cam motor. It is a control block diagram of a lifting device. It is a flow chart of hydraulic lifting control of a 1st embodiment. It is a flow chart of quick affliever operation control. It is a flow chart of hydraulic lifting control of a 2nd embodiment.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, a riding type paper mulch rice transplanter 1 constituting a multi-transplanter includes a planting device 5 constituting a working machine at a rear portion of a traveling machine body 4 having front wheels 2 and rear wheels 3. The laying device 6 is connected via a link mechanism 7 by a hydraulic cylinder 8 so as to be able to move up and down. 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 a front portion of the traveling machine body 4, and this is mounted on a hood. 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 portion of the steering column, and a rear panel cover 16 covers the rear side of the steering column. The steering column is provided with a lever guide for a main transmission lever 17, an auxiliary transmission lever 18, and an engine control lever 19, which operate a hydrostatic continuously variable transmission (Hydro Static Transmission), and in front of the steering column. Is provided with a meter 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 left and right front steps 21, and rear steps 22 are provided behind the left and right front steps 21 and the rear panel cover 16. Further, the rear part of the rear step 22 is raised upward, and a driver's seat 23 is provided on the upper part thereof, and side steps 22a are provided on the left and right of the driver's seat 23 as scaffolds for supplying seedlings to the planting device 5.

In addition, on both left and right sides of the front of the traveling machine body 4, a preliminary seedling stand 24 on which preliminary seedlings (mat seedlings) are placed via mounting frames raised from the chassis frame 9 is provided. A spare roll base 26 that supports a rolled sheet (recycled paper) 25 is provided in the section. 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 as six-row planting includes a planting frame 29 that is connected to the rear part of the link mechanism 7 in a rolling manner, a planter case 30 attached to the planting frame 29, and a planter case. An apron 31 disposed in the left-right direction above 30, a seedling stand 32 that moves left and right along the apron 31, and the seedlings are scraped off from the lower end of the seedling stand 32 by the planting claws 33 and the rice field (soil) It is configured by including a rotary planting mechanism 34 for planting on the. Further, the power from the engine 13 is transmitted to the planter case 30 and the lateral feed case through an HST (not shown) and an auxiliary transmission device incorporated in the transmission case 10, via a planted PTO shaft, a propeller shaft, and the like.

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

The laying device 6 will be described. The laying device 6 has, on the traveling machine body 4 side, the left and right spare roll bases 26 that hold the above-described rolled sheet 25, and the cutter descends when operated forward. A cutter lever 35 for cutting the sheet 25 is provided. Further, on the planting device 5 side, a roll case 36 for accommodating 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 for pressing and detecting unevenness of the rice field, a sheet pressing roller 39 for pressing the sheet 25, and a cutter 40 for cutting the sheet 25 after planting in each stroke are provided.

More specifically, the spare roll base 26 holds the roll-shaped sheet 25 as a spare by the two claws 26a and 26b on the traveling machine body 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 preliminary roll base 26 can be rotated outwardly around the boss portion 26d. Further, a roller 26e is provided on the lower support claw 26a so that the roll-shaped sheet 25 can be placed on the roller 26e and easily inserted into the roll case 36.

As shown in FIG. 4, the roll case 36 has a cylindrical case body 36a attached to the front part of the planting frame 29 via left and right brackets 41 so as to face in the left-right direction. The left and right ends of the opening 36a are closed by covers 36c that open and close with the rear side as a fulcrum 36b. When the rolled sheet 25 is inserted into the case body 36a, the open/close lever 36d unlocks the cover 36c to open the rolled sheet 25 from either the left or right side of the case body 36a. Can be inserted.

In addition, on the lower surface side of the case main body 36a, four conveying rollers 36e which are interlocked with the vertical movement of the holder 37 are provided, and when the rolled sheet 25 is inserted into the case main body 36a, the conveying rollers 36e move upward. Thus, the lower surface of the rolled sheet 25 can be supported and smoothly inserted into the case body 36a.

Further, when the rolled 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 clamped by the boss of the support shaft. Further, when the boss is rotated by the delivery knob 36f, the end of the sheet 25 can be taken out onto the guide 36h from the sheet outlet 36g formed on the rear surface side of the case body 36a.

Further, in the holder 37, the pipe frame 37a is rotatably attached to the lower portion of the roll case 36, and a plurality of support rods 37b fixed to the pipe frame 37a have the seat 25 pulled out 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 vertically moves the transport roller 36e.

Therefore, when inserting the roll-shaped sheet 25 into the roll case 36, the holder operating lever 37c is operated in advance to lower the support rod 37b, and the conveying roller 36e is moved upward. When the insertion is completed, the support rod 37b is raised and the transport roller 36e is moved down. The support rod 37b is buried in the soil at the time of planting work, and holds the pulled-out sheet 25 when the working machine is raised.

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. In addition, the bosses of the left and right plates 38b are externally fitted to the pipes 38c arranged in the left and right direction, so that the front and rear rollers 38a can swing. Further, the pipe 38c is rotatably attached to the ends of the left and right arms 38d, and the rear end of the arm 38d is pivotally supported by a pipe 42 provided in the lower part of the planter case 30 for adjusting the planting depth. The roller float 38 configured in this manner senses the unevenness of the rice field by its vertical movement, and presses the sheet 25 by the front and rear rollers 38a to bring the sheet 25 into close contact with the rice field.

Similarly to the roller float 38, the sheet pressing roller 39 also presses the sheet 25 to bring the sheet 25 into close contact with the rice field, and an arm 39a rotatably attached to a pipe 42 provided in the lower part of the planter case 30. A roller 39b is rotatably supported by the tip of the roller. It should be noted that four sheet pressing rollers 39 are provided in the left-right direction and press the four points of the sheet 25 to prevent the sheet 25 from being turned up and lifted.

Further, in the cutter 40, as shown in FIG. 6, the left and right arms 40a are rotatably attached to the left and right brackets 41 to which the roll case 36 is attached, and a saw-toothed blade portion 40b is provided at the tip of the arm 40a. Attach it detachably. On the other hand, in the cutter lever 35, a grip 35b is attached to an upper portion of a lever main body 35a which is rotatably supported on the traveling machine body 4 side, a hook 35c is provided in the middle, and an inner wire 43 is provided below the hook 35c. Of the inner wire 43 and the other end of the inner wire 43 to the bases of the left and right arms 40a of the cutter 40.

Then, when the hook 35c is disengaged from the traveling 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. When the cutter lever 35 is returned to its original position, the cutter 40 is moved upward by the return spring 44. In addition, a cover (not shown) is attached to the cutter 40 when traveling on the road or when the vehicle is stored to prepare for an unexpected accident.

Next, an elevating device for a working machine configured by 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. The cylinder 8 is connected to the traveling machine body 4 so as to be able to move up and down. In addition, a steering column below the steering wheel 15 is provided with a quick-up lever 45 that constitutes a lifting operation tool and is rotatable front and back and up and down (see FIG. 3 ). Further, a hydraulic pump that supplies 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 also serving as the hydraulic oil tank is guided to the lift control valve 47 via the hose 46, and the lift control valve 47 is mounted on the chassis frame 9 below the driver seat 23. To the bracket via the bracket. Further, the lifting control valve 47 is connected to a hydraulic cylinder 8 mounted between the link mechanism 7 and the chassis frame 9 via a hose.

Further, the lift control valve 47 is composed of a rotary type switching valve that rotates a spool to switch the direction of oil flow, and is divided into a manual part and an automatic part depending on the operating angle of the spool. Of these, the manual portion is a fixed position where the hydraulic oil from the hydraulic pump is supplied to the hydraulic cylinder 8, a fixed position that guides the hydraulic oil from the hydraulic pump to the hydraulic oil tank side, and stops the flow from the hydraulic cylinder 8 to the hydraulic oil tank. It has a position and a descending position for guiding 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 lifting control valve 47 includes a part of the lowered 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 for supplying the hydraulic pressure to the hydraulic cylinder 8. Further, a stop valve is integrally provided in the valve body of the lifting control valve 47, and the stop valve is provided in the oil passage between the lifting control valve 47 and the hydraulic cylinder 8 to prevent the hydraulic fixed lever 48 from moving. By the closing operation, the oil flow between the two can be shut off.

Further, as shown in FIG. 7, a valve arm 49 is provided on the spool of the lifting control valve 47, and a lifter cam 50 and an operating arm 51 which engage with one pin 49a and the other pin 49b provided on the valve arm 49, respectively. Switches the spool of the lifting control valve 47 to the respective positions of the manual part and the automatic part. The lifter cam 50 pivotally supported near the valve arm 49 is rotated by a lifter cam motor 52 composed of an electric motor to switch the manual portion of the lift control valve 47, and also to the lifter cam 50. The clutch arm 53 with which it abuts is actuated, and this clutch arm 53 turns on and off a planting clutch (not shown) interposed in the transmission path from the engine 13 to the planting device 5.

Further, the operation arm 51 which is coaxially supported by the valve arm 49 is connected to the arm 38d of the roller float 38 via a link mechanism 54, and the operation arm 51 is interlocked with the vertical movement of the tip end side of the arm 38d. Rotate. A tension spring 55 is provided between the link mechanism 54 and a pin 49b projecting from the valve arm 49. The tension spring 55 allows the valve arm 49 to be constantly attached to the operation arm 51 side. Energize. Therefore, when the valve arm 49 is rotatable, the pin 49b of the valve arm 49 contacts 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 pin 49a provided on the valve arm 49 (rotates counterclockwise) to move the lift control valve. 47 is switched to the raised position. In that case, the other pin 49b provided on the valve arm 49 is separated from the operation arm 51 against the biasing force of the tension spring 55. When the lifter cam 50 is returned (rotated clockwise) to the fixed position, the valve arm 49 follows the lifter cam 50 by the urging force of the tension spring 55, and the lift control valve 47 is switched to the fixed position.

Further, when the lifter cam 50 is rotated (rotated clockwise) to the lowered position, the lifter cam 50 is disengaged from one pin 49a provided on the valve arm 49, and the valve arm 49 is rotatable. In this state, the valve arm 49 is rotated by the biasing 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 lift control valve 47 is switched to the lowered position. Then, after that, the valve arm 49 and the operation arm 51 rotate integrally, and the lift control valve 47 is controlled by the automatic unit.

That is, in a state where the working machine is not grounded in the automatic section, the roller float 38 is moved downward, the elevating control valve 47 is switched to the lowered position of the automatic section following the lowered position of the manual section, and the working machine is lowered. Further, when the working machine touches the ground, the roller float 38 moves upward, the lift control valve 47 is switched to the underlap position, and the working machine moves up and down following the unevenness of the grounding surface. Furthermore, when a large earth pressure is applied to the roller float 38 and the roller float 38 moves upward, the lift control valve 47 switches to the raised position of the automatic section, and the working machine rises.

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

Next, a control device for switching the lift control valve 47 by the lifter cam 50 will be described. The control device is mainly composed of an electronic control unit (Electronic Control Unit) including a microcomputer and the like. Further, as shown in the block diagram of FIG. 9, the ECU 56 includes a planting switch 57, which is operated at the input side during the planting operation, and an up/down switch 58 for detecting vertical operation of the quick up lever 45, and a cutter 40. The cutter switch 59 for detecting the cutting operation of the sheet 25 by the is connected.

Further, a lift angle potentiometer 60 for detecting an operating angle of the link mechanism 7, a lifter cam potentiometer 61 for detecting a rotation angle of the lifter cam 50, and a pickup sensor 62 for detecting a rotation of an axle to measure a traveling distance are connected. Further, on the output side of the ECU 56, a lifter cam relay 63 for controlling the lifter cam motor 52, a planting lamp 64, an alarm buzzer 65 and a cutter operation request lamp 66 forming an informing means are connected. Then, the ECU 56 includes a hydraulic lifting control program that controls the position of the lifter cam 50 based on the input signal to switch the lifting control valve 47.

When the control is started as shown in FIG. 10, the hydraulic lifting control program first executes the quick-up lever operation control. This quick up lever operation control sets a new hydraulic pressure state (position of the lifter cam 50) mainly based on the planting switch 57, the up/down switch 58 of the quick up lever 45, and the current hydraulic pressure state.

Further, when the quick-up lever operation control is completed, the hydraulic pressure state set by the quick-up lever operation control is corrected based on the cutting operation of the seat 25 by the cutter 40, etc., and the notifying means is activated as necessary. Then, the ECU 56 then drives the lifter cam motor 52 to rotate normally and reversely so that the hydraulic pressure is set by the hydraulic pressure elevation control program by the output program (omitted), and the lifter cam 50 is moved to the designated position (hydraulic state). ) Rotate to.

Here, the quick up lever operation control will be briefly described together with the lifting operation of the working machine. First, as shown in FIG. 11, when the planting switch 57 is turned off (when not in operation), the quick up lever 45 is moved up. If it is operated once in the direction, the position of the lifter cam 50 is set to the up position (hydraulic pressure: up, work implement up). Further, when the quick up lever 45 is operated once downward, the position of the lifter cam 50 is set to be lowered (hydraulic pressure: lowered, the working machine is lowered).

Further, if the quick-up lever 45 is operated once downward while the working machine is moving upward, the position of the lifter cam 50 is set to a fixed position (hydraulic pressure: fixed, the working machine stops at that position). Conversely, if the quick-up lever 45 is operated once upward while the working machine is descending, the position of the lifter cam 50 is set to a fixed position (hydraulic pressure: fixed, the working machine stops at that position).

On the other hand, when the planting switch 57 is turned on and off by the operator (during work), if the quick-up lever 45 is operated downward twice, the position of the lifter cam 50 is set to the lower position by the first operation ( (Hydraulic pressure: Lower, work implement is lowered) Set planting by the second operation (Hydraulic pressure: Planting, planting clutch is turned on). When the quick-up lever 45 is operated twice upward, the position of the lifter cam 50 is set to be lowered by the first operation (hydraulic pressure: lowered, the planting clutch is disengaged), and the second operation is raised. Set (hydraulic pressure: rise, work implement rises).

Further, when the planting clutch is engaged, if the quick-up lever 45 is operated once in the upward direction, the position of the lifter cam 50 is set to the downward position (hydraulic pressure: 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 be raised (hydraulic pressure: raised, working machine is raised). Conversely, when the quick up lever 45 is operated downward, the position of the lifter cam 50 is set to planting (hydraulic pressure: planting, planting clutch is on).

Further, when the work equipment is grounded and the planting clutch is disengaged, if the quick up lever 45 is operated downward, the position of the lifter cam 50 is set to planting (hydraulic pressure: planting, planting clutch is Enter). Then, as in the case where the planting switch 57 is off (when not working), if the quick-up lever 45 is operated once downward while the working machine is moving upward, the position of the lifter cam 50 is set to a fixed position (hydraulic pressure). : Fixed, work machine stops at that position). Conversely, if the quick-up lever 45 is operated once upward while the working machine is descending, the position of the lifter cam 50 is set to a fixed position (hydraulic pressure: fixed, the working machine stops at that position).

When the quick-up lever operation control is completed, the hydraulic lift control program checks the hydraulic state set by the quick-up lever operation control as shown in FIG. 10 (step S1), and if it is raised. Then, it is judged whether or not the work implement has risen to the highest position (step S2), and when the work implement rises to the highest position, the position of the lifter cam 50 is set to a fixed position (hydraulic pressure: fixed, step S3). Prevent further rises in.

Further, when the planting flag is set (step S4) and the cutter operation flag is reset, step S5), the position of the lifter cam 50 is set to the down position (step S6, hydraulic pressure: down), and the alarm buzzer 65 is turned on. The sound is emitted for a short time (step S7), and the cutter operation request lamp 66 is turned on (step S8).

On the other hand, if the hydraulic pressure is not raised in step S1, the hydraulic pressure is further checked (step S9), and if it is planted, the planting flag is checked (step S10) and the planting flag must be set. For example, the planting flag is set (step S11). Further, the pickup sensor 62 starts counting the traveling distance (step S12), and resets the cutter operation flag (step S13).

If the hydraulic pressure state is other than planting in step S9, the hydraulic pressure state is further checked (step S14). If it is lowered, the planting flag is checked (step S15) and the planting flag is set. Then, the traveling distance is determined (step S16), and if the traveling distance exceeds the predetermined distance S, it is determined whether or not the cutting operation of the sheet 25 by the cutter 40 is performed by the cutter switch 59 (step S17). If there is a cutter operation, the cutter operation flag is set (step S18), and the cutter operation request lamp 66 is turned off (step S19).

Further, if the hydraulic pressure state is other than lowered in step S14, that is, if it is fixed, the cutter operation flag is reset (step S20), the traveling distance count is cleared (step S21), and the planting flag is reset. (Step S22), the process finally returns.

Therefore, in the hydraulic lifting control program, when the planting switch 57 is turned on and the working machine is lowered to start planting work of seedlings, the planting flag is set (step S11), and the traveling distance is counted. It is started (step S12), and the cutter operation flag is reset (step S13). Then, when the planting of one stroke is completed, the main speed change lever 17 or the main clutch (not shown) is operated to stop the rice transplanter 1, and the quick up lever 45 is operated once in the upward direction, the hydraulic pressure is lowered. Is set to (the planting clutch is disengaged and the work implement remains lowered).

Therefore, when the cutter lever 35 is operated to cut the sheet 25 between the sheet 25 and the rice field by the cutter 40, the cutter operation flag is set (step S18). Then, when the quick-up lever 45 is operated once again in the upward direction, the hydraulic pressure state is set to be raised and the working machine is raised to the maximum raised position. Therefore, the steering wheel 15 is turned to rotate the rice transplanter 1 to perform the planting work in the next step.

However, after the planting work for one stroke is completed, the quick-up lever 45 is operated once upward (hydraulic pressure: lowered), and further, the quick-up lever 45 is operated upward to raise the working machine. Then, (hydraulic pressure: raised), the cutter lever 35 is not yet operated to cut the seat 25, so that the hydraulic state is reset to the lowered state (step S6, hydraulic pressure: lowered), and the working machine does not rise. Further, since the alarm buzzer 65 sounds or the cutter operation request lamp 66 lights up (steps S7 and S8), the worker notices that he has forgotten to cut the sheet 25.

Then, the operator operates the cutter lever 35 to cut the sheet 25 by the cutter 40. Then, the cutter operation flag is set (step S18), and the cutter operation request lamp 66 is turned off (step S19). Therefore, when the quick-up lever 45 is operated once again in the upward direction, the hydraulic state is set to the up state. The work machine is raised, and the seedlings can be planted in the next step.

When the quick-up lever 45 is operated downward twice with the rice transplanter 1 stopped, the rice transplanter 1 is moved to the planting state (the work machine is not driven when the rice transplanter 1 is stopped). The work machine is driven to plant seedlings, but if the quick-up lever 45 is operated upward without traveling and the traveling distance is zero in step S16, it is necessary to cut the sheet 25 with the cutter 40. In this case, as in the case where the cutter operation is performed, the cutter operation flag is set and the working machine is allowed to rise.

Next, a second embodiment of the hydraulic lifting/lowering control program will be described with reference to FIG. 12. In contrast to the hydraulic lifting/lowering control program of the first embodiment, step S23 of setting a rising request flag in this program, and a rising request Step S24 for judging the state of the flag, step S25 for raising the hydraulic pressure state, and step S26 for resetting the raising request flag are newly added.

That is, as with the first hydraulic lift control program, the second hydraulic lift control program resets the hydraulic pressure to a lower value unless the cutter lever 35 is operated to cut the seat 25 (step S6, (Hydraulic pressure: lowered), the working machine does not rise, but the fact that there is a request for raising the working machine in this case is memorized by the raising request flag, and thereafter, when the cutter lever 35 is operated to cut the seat 25, the hydraulic pressure is changed. The state is set to the requested lift, and it is not necessary to operate the quick-up lever 45 again in the upward direction, and the working machine is lifted.

Therefore, in the second embodiment, after the sheet 25 is cut, the working machine rises without performing the lifting operation of the working machine again, so that the work can be restarted promptly. However, in this case, unlike the first embodiment, the raising operation is not performed again to raise the working machine at an arbitrary timing of the worker, so the control device automatically raises the working machine. Before that, it is desirable to raise the working machine after issuing a warning to that effect using a notification means.

In the above embodiment, if the traveling distance is zero or very small, the work machine is allowed to rise without cutting the sheet 25 by the cutter 40, but once the work machine is lowered to the planting state. There is almost no actual work for raising the working machine without planting seedlings, and in this case also, there is no particular problem even if the operation of the cutter lever 35 is requested and then the working machine is raised. , The steps related to these may be eliminated.

Further, when the spool of the lift control valve 47 is mechanically linked to a lift lever provided beside the driver's seat 23 as in the conventional case to lift and lower the working machine, the seat 25 is still cut by the cutter 40. The lift lever or the spool of the lifting control valve 47 may be configured to be restrained by a stopper or the like so that the working machine cannot be lifted when it is not present. The present invention is not limited to the above embodiment. ..

1 Paper multi rice transplanter (multi transplanter)
5 Planting device 6 Laying device 40 Cutter 45 Quick up lever 47 Elevating control valve 56 ECU (electronic control device)
57 Switch with plant 65 Alarm buzzer (informing means)
66 Cutter operation request lamp (informing means)

Claims (4)

A working machine equipped with a laying device for pulling out a rolled sheet to cover the soil surface and a planting device for planting seedlings in the soil from above the sheet is movably connected to a traveling machine body having front wheels and rear wheels. , At the end of this seedling planting work, in the multi- planting machine in which the pulled sheet is cut by a cutter and the control device controls the working machine to move up and down based on an artificial command, the control device starts the latest planting work. If the sheet is not cut by the cutter after the planting work for a predetermined distance or more from the above, the work machine should be lifted even if an artificial work machine lifting command is issued. A multi-transplanter characterized by being configured not to perform. The multi-transplanter according to claim 1, wherein the control device notifies the operator when the work implement is not lifted regardless of an artificial work implement lift command. It said controller, in a state of being made to planting of a predetermined distance or more from the last planting work start, increase instruction manual operation unit from the sheet is cut by the predetermined distance or more planting later cutter If it is out, multi transplantation machine according to claim 1 or claim 2, characterized in that configured to perform the increase of the working machine. In the state where the planting work is performed for a predetermined distance or more from the start of the most recent planting work , the control device issues an artificial raising command of the working machine without cutting the sheet by the cutter after the planting work for the predetermined distance or more. 3. When the sheet is cut by the cutter after the working machine has not been lifted, the working machine is automatically lifted up. Multi transplanter.

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