JP4676306B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter configured to prevent a seedling planting operation from being stopped due to an erroneous operation or malfunction occurring during the seedling planting operation.

  A transplanting machine, for example, a mat seedling on which a mat seedling is placed and reciprocated to the left and right, and a planting means for scraping the seedling from the seedling mounting base and planting the seedling in a field, In a riding rice transplanter connected to a work machine that performs the above, a detection sensor that is turned on when the seedling platform is moved to a lateral end position is disposed on the work machine, and the work machine is operated to operate the work machine. The attached clutch lever is interlocked with an actuator that can be operated by turning on the detection sensor to turn off the planting clutch lever, and the detection sensor and the actuator can be switched to an on / off state by a switch. There is known one that is configured so that the position of the seedling platform can be set automatically and accurately (see, for example, Patent Document 1).

  Further, in the riding rice transplanter comprising a seedling platform on which a seedling is placed and reciprocated to the left and right, and a planting case that is disposed below the seedling platform and transplants the seedling with a planting claw, the planting A detecting means for detecting that the seedling platform has moved to a predetermined position in the moving direction with respect to the case is detected, and the moving position of the seedling platform is detected and automatically stopped at that position, or with a buzzer or the like. What can be notified is known (see, for example, Patent Document 2).

JP-A-6-319325 (page 2-3, FIG. 4) JP 2002-125424 A (page 3-4, FIG. 3)

  In each of the above-mentioned riding rice transplanters, the operation start means for starting the operation of the automatic planting stop means for automatically disengaging the planting clutch at the left and right moving ends of the seedling platform during the planting operation is erroneously turned on. Or, when it is in the on state due to various troubles, the operator may not be able to continue the planting work in an unexpected state.

  In view of the above circumstances, the present invention detects that the seedling breakage sensor has run out even if the operation starting means is accidentally operated during planting work or the work starting means is turned on due to various faults. If not, an object is to provide a transplanter that can continue the planting operation.

In order to achieve the above object, the present invention according to claim 1 includes a seedling platform (52) on which a mat seedling is placed and reciprocated left and right,
Planting means (46) for scraping seedlings from the seedling platform (52) and planting them in a field;
A planting clutch for connecting and disconnecting power transmission to the reciprocating mechanism (60) of the seedling platform (52) and the planting means (46);
Automatic planting stop means (80) for automatically disengaging the planting clutch at the left and right moving ends of the seedling platform (52);
In a transplanter comprising:
An operation start means (20) for starting the operation of the planting automatic stop means (80);
A seedling break sensor (81) for detecting that the seedling on the seedling platform (52) is a predetermined amount or less;
An automatic stop regulating means (80) that makes the operation of the planting automatic stop means (80) based on the operation start means (20) effective only in a state where the seedling shortage sensor (81) detects the seedling shortage; With
The transplanter is characterized by that.

The present invention according to claim 2 comprises a seat (17) on which an operator can sit,
The operation starting means (20) is disposed under the seat (17).
The transplanter according to claim 1.

According to a third aspect of the present invention, when the seat (17) is tilted, the operation starting means (20) can be operated.
The transplanter according to claim 2.

  The reference numerals in the parentheses are for reference to the drawings and do not limit the present invention.

  According to the first aspect of the present invention, even if the operation starting means is mistakenly operated during planting work, or the work starting means is turned on due to various failures, the seedling out sensor detects the seedling out. If not, the planting stop means is not activated, and it is possible to prevent the operator from unexpectedly entering the planting stop means and not being able to continue the planting operation.

  According to the second aspect of the present invention, since the operation start means is provided under the seat that is not normally operated, an unexpected planting stop due to an erroneous operation can be prevented.

  According to the third aspect of the present invention, if the planting operation is stopped and the operator does not tilt the seat, the operation start means cannot be operated, so that the planting stop due to an erroneous operation can be reliably prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 11 show an embodiment of the present invention. FIG. 1 is a side view of a transplanter, FIG. 2 is a plan view of the transplanter, and FIG. 3 is a side view showing an arrangement of mode switches. FIG. 4 is a side view showing the arrangement of the operation tools for raising and lowering the work implement, FIG. 5 is a side view of the operation unit for operating the work implement, and FIG. 6 is a development view showing the transmission system of the work implement. FIG. 7 shows a position detection unit of a seedling platform in the transplanter, (a) is a perspective view, (b) is a side view, (c) is a front view, and FIG. 8 is a control unit. Block diagram, FIG. 9 is a program flowchart showing hydraulic lifting control, FIG. 10 is a program flowchart showing start determination of planting part end-adjustment control in hydraulic lifting control, and FIG. 11 is a planting part end-adjustment in hydraulic lifting control. It is a program flowchart which shows control cancellation | release judgment.

  As shown in FIGS. 1 and 2, the transplanter 1 in this embodiment includes a traveling vehicle 10 and a working device 30 that is connected after the traveling vehicle 10 and performs seedling planting work. It is configured as.

  The traveling vehicle 10 includes a traveling machine body 13 supported by a pair of front wheels 11 and 11 and rear wheels 12 and 12. An engine (not shown) is mounted on the front of the traveling machine body 13 and a bonnet. 15 is covered. A transmission (not shown) for shifting the output of the engine is arranged behind the engine mounting portion of the traveling machine body 13 and a planting clutch (not shown) is arranged inside the transmission. Has been.

  A driver's seat 16 is disposed behind the hood 15 of the traveling machine body 13, and a seat 17 on which an operator is seated is disposed in the driver's seat 16. As shown in FIG. 3, the seat 17 is supported by the traveling machine body 13 so as to be rotatable in the direction of arrow A via a shaft 18.

  Below the seat 17 is a mode switch 20 that constitutes an operation starting means for starting an operation of an automatic planting stopping means for automatically disengaging the planting clutch at the left and right moving ends of a seedling platform to be described later. Has been placed. When the seat 17 is tilted forward, the mode switch 20 can be operated, and an unintentional erroneous operation can be prevented.

  As shown in FIGS. 1 and 2, the driver's seat 16 is provided with a steering handle 21 and various levers, switches, and pedals necessary for operating the transplanter 1. As shown in FIG. 4, a quick up lever 22 for raising and lowering the work implement 30 is disposed on the side surface of the steering handle 21, A quick up lever raising switch (not shown) for detecting an up / down operation by the up lever 22 and a quick up lever lowering switch (not shown) are arranged.

  As shown in FIG. 1 and FIG. 2, the traveling machine body 13 has a lifting link mechanism 27 formed by an upper link 25 and a lower link 26, the free ends of which are slidable in the vertical direction. The working machine 30 is connected, and the working machine 30 is raised and lowered by expansion and contraction of a hydraulic cylinder 28 controlled by a control valve 31 shown in FIG.

  As shown in FIG. 5, the control valve 31 has an operation shaft (not shown) that is disposed on the side of the traveling machine body 13 and rotated via a lifter cam 33 that is driven by the operation of a lifter cam motor 32. Then, the control valve 31 is switched to a plurality of positions according to the rotation angle, and the hydraulic cylinder 28 (see FIG. 1) is controlled according to each position to control the lifting and lowering of the work implement 30.

  A roller 36a that abuts against the cam surface 33a of the lifter cam 33 is rotatably supported at one end of an operation arm 36 that is supported by the traveling machine body 13 via a bracket 35 so as to be slidable. Further, it is connected to an operation shaft (not shown) for operating on / off of the planting clutch via a rod 37 connected to the other end of the operation arm 36. Therefore, the operation arm 36 is swung by the rotation of the lifter cam 33, so that the planting clutch can be turned on and off.

  A lifter cam potentiometer 38 is disposed on the operation shaft so that the rotational position of the lifter cam 33 can be detected. Further, the control valve 31 is provided with a valve fixing operation tool 40 so that the hydraulic pressure of the control valve 31 can be locked by the valve fixing operation tool 40.

  As shown in FIGS. 1, 2, and 6, the work machine 30 is integrally fixed to a horizontal frame 41 arranged in the left-right direction and the horizontal frame 41 so as to extend in the vertical direction. A work machine frame 43 including a plurality of vertical frames 42 is provided. A plurality of planter cases 45 projecting rearward are arranged on the horizontal frame 41, and planting means 46 for scraping and planting seedlings can be rotated on the rear end side surfaces of the planter cases 45, respectively. Is arranged. A float 47 is swingably disposed on the lower surface of the planter case 45.

  The apron 50 is supported and moved so as to be movable up and down via a scraping adjustment mechanism (not shown) which is disposed above the rear portion of the planter case 45 and can be moved in the vertical direction by operating the scraping adjustment lever 48. The apron 50 is formed with a plurality of notches 51 through which the rotation locus of the tip of the planting means 46 passes.

  A seedling platform 52 is provided that is supported by the work machine frame 43 so as to be movable in the left-right direction and supplies the placed mat-like seedlings to the planting means 46. The lower end portion of the seedling platform 52 is disposed close to the apron 50 and is supplied so that the placed mat-like seedling is in contact with the apron 50. Therefore, by moving the apron 50 in the vertical direction, the amount of seedlings scraped by the planting means 46 can be adjusted. In addition, a seedling shortage sensor (not shown) for detecting that the remaining amount of seedlings on the seedling platform 52 has become a predetermined amount or less is disposed at a predetermined position of the seedling platform 52.

  A drive case 56 to which power is input from the transmission via the PTO shaft is fixed to the horizontal frame 41. Drive shafts 57 protruding left and right from the drive case 56 transmit power to the planter cases 45, transmit power to the planting means 46 through the planter cases 45, and the planting means 46. Is driven to rotate.

  Further, a lateral feed transmission 58 having the drive shaft 57 as an input shaft is provided on the right side of the planter case 45 located at the right end in FIG. Power is transmitted to the screw shaft 61 of the lateral feed device 60 that reciprocates the seedling setting table 52 in the left-right direction via the transmission 58, and the seedling setting table 52 reciprocates as the screw shaft 61 rotates.

  As shown in FIG. 7, a slide piece 63 is arranged on the vertical frame 42 so as to be slidable in the vertical direction together with the apron 50. A slide rail 65 is fixed to the lower surface (surface on the traveling vehicle 10 side) of the seedling platform 52 and is slidably fitted to the slide piece 63.

  A support stay 66 is fixed to the vertical frame 42. A setting plate 67 for setting a moving end in the left-right direction of the seedling platform 52 is fixed to the support stay 66. The setting plate 67 has two notches having different lengths at predetermined intervals in the longitudinal (lateral) direction, that is, a notch for setting one moving end of the seedling table 52 having a short length. 67a and a notch 67b for setting the other moving end of the seedling base 52 are formed.

  An adjustment plate 68 is fixed at a position corresponding to the notch 67b of the setting plate 67 so that the position can be adjusted. The adjustment plate 68 is formed with a notch 68a having substantially the same length as the notch 67a. By moving the notch 68a of the adjustment plate 68 within the range of the notch 67b of the setting plate 67, The other moving end of the seedling platform 52 can be set as appropriate.

  At a predetermined position of the slide rail 65, a bracket 70 and a support block 71 supported by the bracket 70 so as to be movable in the vertical direction are arranged, and the support block 71 has left and right sides of the seedling platform 52. A moving end detection sensor 72 for detecting the moving end is supported.

  The moving end detection sensor 72 has a groove formed on its side surface so as to be slidably fitted to the setting plate 67 and the adjustment plate 68. The light projecting element faces one of the grooves and the light receiving element faces the other. When the light receiving element receives the light from the light projecting element at the position corresponding to the notch 67a and the notch 68a, it detects that the seedling support 52 has reached its moving end. It is like that.

  As shown in FIG. 8, the control device 80 of the transplanter 1 is constituted by a microcomputer, and on the input side thereof, the mode switch 20, the lifter cam potentiometer 38, the moving end detection sensor 72, the seedling out sensor 81, In addition to the quick up lever raising switch 82, the quick up lever lowering switch 83, the planting switch 85, the end alignment switch 86, the engine rotation sensor 87, etc., switches and sensors necessary for control are connected. In addition to the lifter cam motor 32, the planting monitor 90, the horizontal automatic monitor 91, the horizontal automatic motor 92, and the like, devices necessary for control are connected to the output side of the control device 80. The control device 80 regulates the operation of the planting automatic stop unit that automatically disengages the planting clutch based on the detection signal from the moving end detection sensor 72 and the planting automatic stop unit. It also serves as an automatic stop regulation means.

  As shown in FIG. 9, the control device 80 performs the lifting control of the work machine 30. The operation state of the quick up lever 22 is detected, and when the quick up lever 22 is operated, control according to the operation is performed (step S1 in FIG. 9, hereinafter simply referred to as step S). The control procedure in step S1 is separately programmed as a subroutine, but the description thereof is omitted in this proposal.

  A planting part (seedling stage 52) end adjustment control start determination is performed (step S2). The determination of the start-up control of the planting unit in step S2 is performed by a subroutine shown in FIG. Based on the output of the engine rotation sensor 87, it is determined whether or not the engine is rotating (step SA1 in FIG. 10, hereinafter simply referred to as step SA). If the engine is rotating at step SA1, it is determined whether the planting switch 85 is ON or OFF (step SA2).

  If the planting switch 85 is ON in step SA2, the remaining amount of seedling is determined based on the output of the seedling out sensor 81 (step SA3). If the output of the seedling shortage sensor 81 is ON in step SA3, the remaining amount of seedlings placed on the seedling placing stand 52 is a predetermined amount (for example, transplanting of seedlings continues from one side to the other side). In the case of OFF, it indicates that the remaining amount of the seedling placed on the seedling stage 52 is equal to or more than a predetermined amount.

  If the seedling shortage sensor 81 is ON in step SA3, it is determined whether or not the mode switch 20 has been operated (step SA4). If the mode switch 20 is in the operated state in step SA4, the end alignment control flag is turned ON, and the hydraulic system maintains the planting state (step SA5).

  If the engine is stopped in Step SA1, the planting switch 85 is OFF in Step SA2, the seedling sensor 81 is OFF in Step SA3, Step SA4. If the mode switch 20 has not been operated, the end alignment control flag is turned OFF (step SA6).

  That is, when the engine is rotating, the planting switch 85 is turned ON, the seedling shortage sensor 81 detects that the remaining amount of seedlings is less than a predetermined amount, and the mode switch 20 is operated. Only, the edge adjustment control flag is turned ON, and the edge adjustment control is enabled.

  As shown in FIG. 9, when the subroutine of step S2 is completed, a planting part end-alignment control release determination is performed (step S3). The determination of canceling the end-alignment control of the planting unit in step S3 is performed by a subroutine shown in FIG. It is determined whether the edge adjustment control flag is ON or OFF (step SB1 in FIG. 11, hereinafter, simply referred to as step SB).

  If the edge adjustment control flag is ON in step SB1, it is determined whether or not the hydraulic system is in a planting state (step SB2). If the hydraulic system is in the planting state at the step SB2, the current (current) ON / OFF state of the end alignment switch 86 is determined (step SB3). In step SB3, when the state of the edge alignment switch 86 is ON, the previous determination result of the edge alignment switch 86 is determined (step SB4).

  If the previous determination result of the end alignment switch 86 is OFF in step SB4, the end alignment control flag is set to OFF, and the hydraulic system maintains the planting (lowering) state (step SB5). In step SB1, if the edge adjustment control flag is OFF, if the hydraulic system is in a state other than planting in step SB2, the edge adjustment switch 86 is OFF in step SB3. In step SB4, when the state of the edge adjustment switch 86 is ON at the previous determination, the process proceeds to the next control without changing the edge adjustment control flag.

  That is, when the edge adjustment control flag is set to OFF in step S2, the process passes through step S3 as it is and proceeds to the next control. If the edge adjustment control flag is set to ON in step S2, if the hydraulic system is in a state other than planting, the current judgment of the edge adjustment switch 86 is OFF even if the hydraulic system is in the planting state. In this case, if the current determination of the edge adjustment switch 86 is ON and the previous determination is also ON, the process proceeds to the next control while the edge adjustment control flag remains ON. In other cases, the edge adjustment control flag is set to OFF, and the process proceeds to the next control.

  After the end-alignment control flag is set as described above, as shown in FIG. 9, it is determined whether the work system 30 is in the raised position or the lowered position by raising or lowering the hydraulic system (step S4). . If it is determined in step S4 that the work implement 30 is in the raised position, it is determined whether the work implement 30 is in the highest raised position (step S5). When the work implement 30 is at the highest position in step S5, the hydraulic system is fixed in the current state (step S6).

  In step S5, when the work implement 30 is not at the highest rise position but is in the rise position, when the hydraulic system is fixed in step S6, the planting monitor is turned off (step S7), and the work implement 30 is in the planting state. Is displayed.

  If the hydraulic system is other than raised in step S4, it is determined in the hydraulic state whether the work implement 30 is in the planting position (step S8). If the work implement 30 is in a position other than the planting position in step S8, the process proceeds to step S7. If the working machine 30 is in the planting position in step S8, it is determined whether or not the fertilization system to be applied to the field is clogged simultaneously with seedling planting (step S9). If the fertilization system is not clogged in step S9, the waiting state for entering the planting clutch is canceled (step S10), the planting monitor 90 is turned on (step S11), and the planting state is entered. indicate. If the fertilization system is clogged at step S9, the hydraulic pressure is lowered (step S12) to shift to a standby state.

  As described above, the control device 80 also serves as an automatic stop regulating means that enables the operation of the automatic planting stopping means based on the operation of the mode switch 20 only when the seedling shortage sensor 81 detects the seedling shortage. The planting operation can be prevented from being stopped in an unexpected state by the operator.

It is a side view of a transplant machine. It is a top view of a transplant machine. It is a side view which shows arrangement | positioning of a mode switch. It is a side view which shows arrangement | positioning of the operation tool which raises / lowers a working machine. It is a side view of the operation part which operates a working machine. It is an expanded view which shows the transmission system of a working machine. The position detection part of the seedling stand in a transplanter is shown, (a) is a perspective view, (b) is a side view, (c) is a front view. It is a block diagram which shows a control part. It is a program flowchart which shows hydraulic pressure raising / lowering control. It is a program flowchart which shows the planting part end alignment control start judgment in hydraulic raising / lowering control. It is a program flowchart which shows the planting part end adjustment control cancellation | release judgment in hydraulic raising / lowering control.

Explanation of symbols

17 Seat 20 Operation start means (mode switch)
46 Planting means 52 Seedling bed 60 Reciprocating mechanism (transverse feed device)
80 Planting automatic stop means, automatic stop regulation means (control device)
81 Seedling sensor

Claims (3)

A seedling table on which mat seedlings are placed and reciprocated left and right;
Planting means for scraping seedlings from the seedling table and planting them in a field;
A planting clutch for connecting and disconnecting power transmission to the seedling table reciprocating mechanism and the planting means;
Planting automatic stopping means for automatically cutting and operating the planting clutch at the left and right moving ends of the seedling platform;
In a transplanter comprising:
Operation starting means for starting the operation of the planting automatic stop means;
A seedling shortage sensor for detecting that the seedling on the seedling table is below a predetermined amount;
Automatic stop regulating means for making the operation of the planting automatic stop means based on the operation start means effective only in a state where the seedling shortage sensor detects a seedling shortage,
A transplanter characterized by that. Equipped with a seat where the operator can sit,
The operation starting means is disposed under the seat,
The transplanter according to claim 1. When the seat is tilted, the operation starting means can be operated.
The transplanter according to claim 2.

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