JP2018019647A - Multi-transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide multi-transplanters for planting seedlings while laying a roll sheet 25, the multi-transplanter preventing the terminal end side of the sheet from being lifted or the sheet from being torn when a laying apparatus 6 rises together with a planting apparatus 5 to revolve and the like.SOLUTION: A control apparatus 56 which controls the up and down of a work machine is configured not to go up the work machine if, after lowering the work machine so as to plant seedlings, when lifting an artificial work machine is ordered a sheet 25 has not yet been cut by a cutter 40.SELECTED DRAWING: Figure 6

Description

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

  Multi-cultivation is carried out to cover the soil surface with multi-materials when cultivating crops, and even when paddy rice is cultivated, 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. And if this rice transplanter is used to plant rice, it is expected that labor-saving cultivation of organic rice and reduced pesticide rice will be possible without the need for herbicides and herbicidal work.

  Note that recycled paper mulch blocks most of the sun rays, so that germination of the seeds of the weeds on the bottom surface is suppressed, and even if it germinates, it cannot grow and cannot grow. Alternatively, the sheet physically suppresses growth even after germination. Furthermore, since the recycled paper is on the soil surface, it is said that the oxygen concentration in the soil is lowered, and germination and growth of weed seeds are suppressed.

  Also, in such a multi-planter (paper multi-rice planter), a planting device for planting seedlings in order to lay a rolled sheet (multi-material, specifically recycled paper) on the soil surface A roll case constituting the laying apparatus is provided in front of the sheet, and a roll-shaped sheet set on the roll case is pulled out on the sheet holder by a predetermined amount. Further, the drawn sheet is brought into close contact with the soil surface with a roller float or a presser roller as the transplanter runs, and then 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 seedlings in the soil simultaneously with the punching of the sheet from above the sheet in close contact with the soil surface. In addition, when the row planting is performed for one stroke and the headland is reached, the transplanter is turned to go to the next stroke, but the working machine constituted by the laying device and the planting device is used for the traveling machine body for turning. When lifted, the end side of the sheet that is brought into 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 knocks down the seedling. Or the sheet breaks and disturbs the border in the headland.

  So, when raising the work implement to reach the headland etc., first lift the work implement after cutting the end part of the sheet in close contact with the soil surface with a cutter each time so that the sheet does not accompany it. Rotate the transplanter to go to the next step and 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 described above, in the multi transplanter (paper multi rice transplanter), when the work machine is lifted up to the headland or the like, the lever provided on the side of the driver's seat is operated so that the end portion of the sheet in close contact with the soil surface is removed. It is necessary to cut with a cutter. However, when using a multi-transplanter for the first time, the operator does not know the necessity of this cutter operation, or even a skilled person rushes to plant seedlings, so forget to cut the sheet and raise the work machine and turn it as it is There are often things.

   In that case, the terminal end side of the sheet brought into 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 defeats the seedling. Or the sheet breaks and disturbs the border in the headland. Therefore, it is necessary to plant the lifted sheet separately by cutting it manually with a cutter and then replanting it, or to fix the sheet and manually replant the seedling. However, extra effort will be forced.

  In addition, when an extra sheet remains on the soil surface, when a new sheet is stacked on the soil surface and planting is performed, the extra sheet may be entangled with the sheet holder or the like, and a clean sheet may not be laid. In addition, when the headland is planted, the end of the striped sheet is trimmed and removed at the position where the headland is planted in one round trip, or when the planting is performed again, the already laid sheet is removed. After removal, it is necessary to plant.

  Therefore, in view of the above problems, the present invention is a multi-planting machine for planting seedlings while laying a roll-shaped sheet on the soil surface, and planting a laying device for turning or the like It is an object of the present invention to provide a multi-implanter that prevents the end side of a sheet from being lifted or the sheet from being torn when it is lifted together with the device.

  In order to solve the above-mentioned problem, the present invention firstly, a working machine including a laying device that pulls out a roll-shaped sheet and covers the soil surface, and a planting device that plants seedlings on the soil from above the sheet, A multi-unit which is connected to a traveling machine body including front wheels and rear wheels so as to be movable up and down, and at the end of planting work of this seedling, the drawn sheet is cut by a cutter and a control device controls the working machine to be raised and lowered based on an artificial command. In the transplanting machine, the control device lowers the work machine to perform seedling planting work, and then when an artificial work machine ascent command is issued, the sheet is not yet cut by the cutter. Is characterized in that the working machine is not raised.

  According to a second aspect of the present invention, when the control device does not raise the work implement regardless of an artificial work implement rise command, the control device notifies the operator of this.

  Further, according to the third aspect of the present invention, when the sheet is not cut by the cutter and the work machine is not lifted and the sheet is cut by the cutter, The construction is such that the work implement is lifted when the lift command is issued again.

  According to a fourth aspect of the present invention, when the sheet is not cut by the cutter and the work machine is not lifted and the sheet is cut by the cutter, the control device automatically turns off the work machine. It is configured to be raised.

  According to the multi-transplanter of the present invention, the control device lowers the work machine to perform seedling planting work, and then when the artificial work machine lift command is issued, the sheet is still cut by the cutter. If the machine is not lifted, the work machine is not lifted, so if the forgetting to cut the sheet with the cutter, the work machine will not rise. Can be eliminated.

  In addition, when the control device does not raise the work implement regardless of the artificial work implement rise command, the control device notifies the worker that the work implement does not rise, or the notification causes the cutter to By noticing that the sheet has not been cut by the above, the seedling planting operation can be resumed by appropriately dealing with the situation such as cutting the sheet promptly without causing confusion.

  Furthermore, when the sheet is not cut by the cutter and the work machine is not lifted, and then the sheet is cut by the cutter, the control device reissues an artificial work machine lift command. When the work machine is lifted up, it is noticed that the sheet has not been cut, and after cutting the sheet, the lift is performed again by raising the work machine, and the transplanter is turned, etc. Work can be continued. Further, since the control device does not lift the work machine after waiting for the cutting of the sheet, the work machine does not rise at an unexpected timing, and the work can be performed safely.

  The control device is configured to automatically raise the work machine when the sheet is not cut by the cutter and the work machine is not raised and then the sheet is cut by the cutter. After the cutting, the work machine is lifted without performing the lifting operation of the work 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 which shows the periphery of a meter panel. A laying apparatus is shown, (a) is a side view of a preparation state, (b) is a side view of a working state. FIG. 6 is a side view illustrating a state in which a roller float and a sheet pressing roller are attached. 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 the lifting device. It is a flowchart of the hydraulic pressure raising / lowering control of 1st Embodiment. It is a flowchart of a quick aber bar operation control. It is a flowchart of hydraulic pressure raising / lowering control of 2nd Embodiment.

  Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1 to FIG. 3, a riding-type paper multi-rice transplanter 1 that constitutes a multi-planter is provided with a planting device 5 that constitutes a work machine at a rear portion of a traveling machine body 4 that includes a front wheel 2 and a rear wheel 3. The laying device 6 is connected by a hydraulic cylinder 8 through a link mechanism 7 so as to be movable up and down. 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, etc., and an engine 13 is mounted on the front part of the traveling machine body 4, and this is connected to the 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 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 for operating a hydrostatic continuously variable transmission (Hydro Static Transmission), and in front of the steering column. Provides a meter panel 20 having a monitor and various switches.

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

  Further, on both the left and right sides of the traveling machine body 4 near the front part, there are provided spare seedling stands 24 for placing the spare seedlings (mat seedlings) through the mounting frames raised from the chassis frame 9, and both the left and right sides near the rear part. The part is provided with a preliminary roll base 26 for supporting a roll-shaped sheet (recycled paper) 25. A center pole 27 is provided at the front portion of the chassis frame 9 so as to be pivotable back and forth, and a trace marker 28 is 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 portion of the link mechanism 7 in a rolling manner, a planter case 30 that is attached to the planting frame 29, and a planter case. An apron 31 disposed in the left-right direction above 30, a seedling stage 32 that moves left and right along the apron 31, and seedlings are scraped off from the lower end of the seedling stage 32 by the planting claws 33, and the surface (soil) A rotary planting mechanism 34 or the like for planting is provided. The power from the engine 13 is transmitted to the planter case 30 and the lateral feed case via a planted PTO shaft, a propeller shaft, and the like through an HST (not shown) and a sub-transmission device built in the transmission case 10.

  The power transmitted to the planter case 30 drives the rotary planting mechanism 34, and the power transmitted to the lateral feed case rotates the screw shaft and meshes with the spiral groove of the screw shaft. A slide block connected to the back surface (front surface) of the mounting table 32 reciprocates the seedling mounting table 32 left and right. Further, the longitudinal feeding cam provided at one end of the screw shaft drives the longitudinal feeding mechanism of the seedling placing table 32 and feeds the mat seedling placed on the seedling placing table 32 toward the apron 31 below.

  Further, the laying device 6 will be described. The laying device 6 is disposed on the traveling machine body 4 side, the left and right auxiliary roll bases 26 holding the roll-shaped sheet 25 described above, 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, there are 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 lifted together with the planting device 5, and the sheet 25. A roller float 38 for pressing and detecting unevenness of the surface of the sheet, a sheet pressing roller 39 for pressing the sheet 25, and a cutter 40 for cutting the sheet 25 at the end of planting in each process are provided.

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

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

  In addition, on the lower surface side of the case main body 36a, four conveyance rollers 36e interlocking with the vertical movement of the holder 37 are provided, and when the roll-shaped sheet 25 is inserted into the case main body 36a, the conveyance roller 36e moves up. Thus, the lower surface of the roll-shaped sheet 25 can be supported and inserted smoothly into the case body 36a.

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

  Further, the holder 37 has a pipe frame 37a rotatably attached to a lower portion of the roll case 36, and a plurality of support rods 37b fixed to the pipe frame 37a allows the sheet 25 drawn from the roll case 36 to be placed on the upper surface thereof. Receive and hold. The holder operating lever 37c rotates the pipe frame 37a and moves the conveying roller 36e up and down.

  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 transport roller 36e is moved up. When the insertion is completed, the support rod 37b is raised, and the conveying roller 36e is moved downward. The support rod 37b is buried in the soil at the time of planting work, and the pulled out sheet 25 is placed and held when the working machine is raised.

  As shown in FIG. 5, the roller float 38 pivotally 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 on pipes 38c arranged in the left-right direction so that the front and rear rollers 38a can swing. Further, the pipe 38c is rotatably attached to the front ends of the left and right arms 38d, and the rear end of the arm 38d is pivotally supported by a pipe 42 that adjusts the planting depth provided in the lower portion of the planter case 30. The roller float 38 configured as described above senses the unevenness of the surface by moving up and down, and presses the sheet 25 by the front and rear rollers 38a to bring the sheet 25 into close contact with the surface.

  Similarly to the roller float 38, the sheet pressing roller 39 also presses the sheet 25 so that the sheet 25 is brought into close contact with the surface of the sheet. The arm 39a is rotatably attached to a pipe 42 provided at the lower portion of the planter case 30. A roller 39b is pivotally supported at the tip of the shaft. Note 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, as shown in FIG. 6, the cutter 40 has left and right arms 40a rotatably attached to left and right brackets 41 to which a roll case 36 is attached, and a saw blade-like blade portion 40b is attached to the tip of the arm 40a. Removably attach. On the other hand, the cutter lever 35 has a grip 35b attached to the upper part of a lever main body 35a pivotally supported on the traveling machine body 4 side, a hook 35c provided in the middle, and an inner wire 43 below the hook 35c. The other end of the inner wire 43 is attached to the base side of the left and right arms 40 a of the cutter 40.

  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 between the surface. Further, when the cutter lever 35 is returned to the original position, the cutter 40 is moved upward by the return spring 44. Note that a cover (not shown) is put on the cutter 40 when traveling on the road or at the time of storage to prepare for an unexpected accident.

  Next, the lifting device for the working machine constituted 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 movable up and down. In addition, the steering column below the steering wheel 15 is provided with a quick up lever 45 that can be rotated back and forth and up and down to constitute an elevating operation tool (see FIG. 3). Furthermore, 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 always driven by the engine 13.

  The hydraulic oil sucked by the hydraulic pump from the transmission case 10 also serving as a hydraulic oil tank is guided to the lift control valve 47 via the hose 46, and the lift control valve 47 is connected to the chassis frame 9 below the driver seat 23. Attach via bracket. Further, piping is provided from the elevation control valve 47 to the hydraulic cylinder 8 attached between the link mechanism 7 and the chassis frame 9 via a hose.

  Further, the elevation control valve 47 is constituted by a rotary switching valve that switches the direction of oil flow by rotating the spool, and is divided into a manual part and an automatic part depending on the operating angle of the spool. Among these, the manual part is a raised position for supplying the hydraulic oil from the hydraulic pump to the hydraulic cylinder 8, and is fixed to guide the hydraulic oil from the hydraulic pump to the hydraulic oil tank side and stop the flow from the hydraulic cylinder 8 to the hydraulic oil tank. And a lowered position for guiding the pressure oil from the hydraulic pump and the oil in the hydraulic cylinder 8 to the hydraulic oil tank side.

  On the other hand, the automatic part of the lift control valve 47 includes 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 pressure oil from the hydraulic pump. There is a rising position for supplying the pressure to the hydraulic cylinder 8. Further, a stop valve is integrally provided in the valve body of the lift control valve 47, and this stop valve is interposed in the oil passage between the lift control valve 47 and the hydraulic cylinder 8, 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 lift control valve 47, and a lifter cam 50 and an operating 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 lift control valve 47 to each position of the manual part and the automatic part. The lifter cam 50 pivotally supported in the vicinity of the valve arm 49 is rotated by a lifter cam motor 52 formed of an electric motor to switch the manual portion of the lift control valve 47 and to the lifter cam 50. The contacting clutch arm 53 is operated, and this clutch arm 53 turns on and off a planting clutch (not shown) interposed in a transmission path from the engine 13 to the planting device 5.

  The operation arm 51 pivotally supported on the same axis 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 on the tip side of the arm 38d. Rotate. A tension spring 55 is installed between the middle portion of the link mechanism 54 and a pin 49b protruding from the valve arm 49, and the valve arm 49 is always attached to the operation arm 51 side by the tension spring 55. Rush. For this reason, 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.

  Accordingly, 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), thereby raising and lowering the control valve. 47 switches to the raised position. In this case, the other pin 49 b provided on the valve arm 49 is separated from the operation arm 51 against the urging force of the tension spring 55. When the lifter cam 50 is returned to the fixed position (turned clockwise), the valve arm 49 follows the lifter cam 50 by the urging force of the tension spring 55, and the elevation control valve 47 is switched to the fixed position.

  Further, when the lifter cam 50 is rotated to the lowered position (rotating clockwise), the engagement between the lifter cam 50 and one pin 49a provided on the valve arm 49 is released, and the valve arm 49 is freely 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 elevation control valve 47 is switched to the lowered position. Thereafter, the valve arm 49 and the operation arm 51 are integrally rotated, and the elevation control valve 47 is controlled by the automatic unit.

  That is, in a state where the working machine is not grounded in the automatic part, the roller float 38 is moved downward, and the elevation control valve 47 is switched to the lowering position of the automatic part following the lowering position of the manual part, and the working machine is lowered. When the work implement is grounded, the roller float 38 is moved upward and the lift control valve 47 is switched to the underlap position, and the work implement is lifted and lowered following 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 elevation control valve 47 is switched to the ascending position of the automatic unit, and the work machine is raised.

  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 lowered position, fixed position, and raised position, the planting clutch is disengaged.

  Next, a control device that switches the lift control valve 47 by the lifter cam 50 described above will be described. The control device is mainly composed of an electronic control unit (Electronic Control Unit) composed of a microcomputer or the like. Further, as shown in the block diagram of FIG. 9, the ECU 56 includes a planting switch 57 that is operated when the planting operation is performed on the input side, a raising / lowering switch 58 that detects the up / down operation of the quick up lever 45, and the cutter 40. A cutter switch 59 is connected to detect the cutting operation of the sheet 25.

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

  When the control is started as shown in FIG. 10, the hydraulic lift control program first executes quick up lever operation control. This quick up lever operation control sets a new hydraulic 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 state.

  When the quick-up lever operation control is completed, the hydraulic state set by the quick-up lever operation control is corrected based on the cutting operation of the seat 25 by the cutter 40, and the notification unit is activated as necessary. Then, the ECU 56 drives the lifter cam motor 52 to rotate in the forward and reverse directions so that the hydraulic pressure state set in the hydraulic pressure raising / lowering control program is set by the output program (omitted), and the lifter cam 50 is moved to the designated position (hydraulic state). ).

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

  Further, when the quick up lever 45 is operated once in the downward direction while the work implement is raised, the position of the lifter cam 50 is set to be fixed (hydraulic: fixed, the work implement stops at that position). Conversely, when the quick up lever 45 is operated once in the upward direction while the work implement is descending, the position of the lifter cam 50 is set to be fixed (hydraulic: fixed, the work implement stops at that position).

  On the other hand, when the planting switch 57 is switched on by the operator (during operation), if 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 ( (Hydraulic pressure: lowered, work implement descends) Set planting by the second operation (hydraulic: planting, planting clutch is engaged). In addition, if the quick-up lever 45 is operated twice in the upward direction, 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 raised by the second operation. 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 be lowered (hydraulic pressure: lowered, 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 (hydraulic pressure: rise, work implement rises). On the contrary, 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).

  In addition, when the planting clutch is disengaged while the work implement is in contact with the ground, if the quick up lever 45 is operated downward, the position of the lifter cam 50 is set to planting (hydraulic: planting, planting clutch is Will be in). Then, as in the case where the planting switch 57 is turned off (during non-working), if the quick-up lever 45 is operated once downward while the work implement is being raised, the position of the lifter cam 50 is set to be fixed (hydraulic pressure) : Fixed, the machine stops at that position). Conversely, when the quick up lever 45 is operated once in the upward direction while the work implement is descending, the position of the lifter cam 50 is set to be fixed (hydraulic: fixed, the work implement stops at that position).

  When the quick-up lever operation control is completed, the hydraulic pressure raising / lowering control program looks at the hydraulic pressure set by the quick-up lever operation control as shown in FIG. 10 (step S1). Next, it is determined whether the work machine has been raised to the highest position (step S2). When the work machine has been raised to the highest position, the position of the lifter cam 50 is set to be fixed (hydraulic: fixed, step S3). Prevent further rise in

  If 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 be lowered (step S6, hydraulic pressure: lowered), and the alarm buzzer 65 is set. The sound is blown 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 state is not raised in step S1, the hydraulic pressure state is further checked (step S9), and if it is planting, the planting flag is viewed (step S10), and the planting flag must be set. If so, a planting flag is set (step S11). Further, the count of the travel distance is started by the pickup sensor 62 (step S12), and the cutter operation flag is reset (step S13).

  If the hydraulic state is other than planting in step S9, further check the hydraulic state (step S14), and if it is lower, see the planting flag (step S15) and the planting flag is set. Then, the travel distance is determined (step S16). If the travel distance exceeds the predetermined distance S, it is determined whether the cutter 25 has cut the sheet 25 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).

  In step S14, if the hydraulic pressure is not lowered, that is, if it is fixed, the cutter operation flag is reset (step S20), the travel distance count is cleared (step S21), and the planting flag is reset. (Step S22), the process returns to the last.

  Therefore, in the hydraulic lift control program, when the planting switch 57 is turned on and the work implement is lowered to start seedling planting work, the planting flag is set (step S11), and the travel distance is counted. The process is started (step S12), and the cutter operation flag is reset (step S13). When the planting of one stroke is completed, the main shift 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. (The planting clutch is disengaged and the working machine remains lowered).

  Accordingly, when the cutter lever 35 is operated and the sheet 25 is cut between the sheet surface 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 work machine is raised to the highest position. Therefore, the steering wheel 15 is turned to turn the rice transplanter 1 to perform the planting operation for the next stroke.

  However, after completing the planting operation in one stroke, 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 work implement. Then (hydraulic pressure: raised), the cutter lever 35 has not yet been operated to cut the seat 25, so that the hydraulic pressure state is reset to lowered (step S6, hydraulic pressure: lowered), and the work implement does not rise. Further, since the alarm buzzer 65 sounds or the cutter operation request lamp 66 lights up (steps S7 and S8), the operator notices that he has forgotten to cut the sheet 25.

  Therefore, the operator operates the cutter lever 35 to cut the sheet 25 with the cutter 40. Then, the cutter operation flag is set (step S18), and the cutter operation request lamp 66 is turned off (step S19). When the quick-up lever 45 is operated once more upward, the hydraulic pressure state is set to be increased. The work machine moves up and can continue to plant seedlings in the next process.

  In addition, if the quick-up lever 45 is operated twice in the state where the rice transplanter 1 is stopped, the planting state is reached (the working machine is not driven when the rice transplanter 1 is stopped), and the rice transplanter 1 is caused to travel here. The working machine is driven to plant seedlings, but if the quick-up lever 45 is operated upward without traveling, the travel distance is zero in step S16, so the sheet 25 must be cut by the cutter 40. In this case, similarly to the case where the cutter operation is performed, the cutter operation flag is set, and the work machine is allowed to rise.

  Next, the second embodiment of the hydraulic lift control program will be described with reference to FIG. 12. In this case, the hydraulic lift control program of the first embodiment is set to step S23 for setting a lift request flag, and the lift request. Step S24 for determining the state of the flag, step S25 for raising the hydraulic pressure state, and step S26 for resetting the ascent request flag are newly added.

  That is, the second hydraulic pressure raising / lowering control program resets the hydraulic pressure state to lower unless the seat 25 is cut by operating the cutter lever 35, similarly to the first hydraulic pressure raising / lowering control program (step S6, However, the work implement does not rise, but the rise request flag is memorized by the rise request flag, and then the cutter 25 is operated to cut the seat 25. The state is set to the requested increase, the second upward operation of the quick up lever 45 is unnecessary, and the work implement is raised.

  Therefore, in the second embodiment, after the sheet 25 is cut, the work machine is lifted without performing the lifting operation of the work machine again, so that the work can be resumed promptly. However, in this case, as in the first embodiment, since the raising operation is not performed again and the work machine is raised at any timing of the operator, the control device automatically raises the work machine. It is desirable to raise the work implement after warning using the notification means.

  In the above embodiment, if the traveling distance is zero or slight, the working machine is allowed to rise without cutting the sheet 25 with the cutter 40, but once lowered into the planting state. It is almost impossible to raise the working machine without planting seedlings in actual work, and in this case, there is no particular problem even if it is requested to operate the cutter lever 35 and then the working machine is raised. These steps may be eliminated.

  In addition, when the working machine is lifted up and down by mechanically linking the spool of the lift control valve 47 to a lift lever provided beside the driver seat 23 as in the prior art, the seat 25 is still cut by the cutter 40. The lift lever or the spool of the lift control valve 47 may be restrained by a stopper or the like so that the lifting operation of the work implement cannot be performed when there is not, and 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 Planting switch 65 Alarm buzzer (notification means)
66 Cutter operation request lamp (notification means)

Claims (4)

  A work machine comprising a laying device that pulls out a rolled sheet and covers the soil surface, and a planting device that plants seedlings into the soil from above the sheet is connected to a traveling machine body that includes front and rear wheels so as to be movable up and down. At the end of the seedling planting operation, the drawn sheet is cut by a cutter, and the control device lowers the work machine in a multi-planting machine in which the control device controls the raising and lowering of the work machine based on an artificial command. After planting the seedlings, when the artificial work machine lift command is issued, if the sheet has not been cut by the cutter, the work machine should not be lifted. Multi transplant machine characterized by.   2. The multi-transplanter according to claim 1, wherein, when the control device does not raise the work machine regardless of an artificial work machine ascent command, the control device notifies the operator of this.   When the sheet is not cut by the cutter and the working machine is not lifted, the control device, when the sheet is cut by the cutter, the artificial work machine lift command is issued again. The multi-transplanter according to claim 1 or 2, characterized in that the working machine is lifted.   The control device is configured to automatically raise the work machine when the sheet is not cut by the cutter and the work machine is not raised and then the sheet is cut by the cutter. The multi-transplanter according to claim 1 or 2.

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