JP2009207391A - Rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly perform the work of seedling-filling by stopping a seedling-loading stand at a correct seedling-filling position in a rice transplanter constituted as transplanting the seedlings loaded on a reciprocally and laterally moving seedling-loading stand in a prescribed stroke by cutting out one stock each with a transplanting mechanism, at the lower end part of the seedling-loading stand. <P>SOLUTION: This rice transplanter includes a unit for stopping lateral movement, for automatically stopping the seedling-loading stand 31 in which lateral movement is started, at its stroke end. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rice transplanter configured to cut out and plant seedlings placed on a seedling base that reciprocates horizontally by a fixed stroke one by one by a planting mechanism at a lower end portion of the seedling base.

In the rice transplanter, when the seedling platform reaches the end of the lateral feed stroke and the cutting of the last seedling in the front row (bottom end) is completed, the seedling feeding belt is fed by a predetermined amount to place the placed seedling on the seedling. It is configured such that the first seedling in the next row is cut out before the seedling base is moved in the reverse direction after feeding to the lower end of the base (for example, see Patent Document 1).
JP 2006-94744 A

  In the seedling cutting structure as described above, when a seedling is first loaded into an empty seedling platform, in order to start cutting the seedling from the end of the front row of the placed seedling, the seedling platform is stroke end. It is necessary to perform seedling loading at the location. Therefore, in the prior art, first, the seedling platform is moved laterally by idle operation, and it is visually confirmed that it has reached the stroke end, the planting clutch is turned off, and the seedling is loaded on the seedling platform that has stopped at this stroke end. I am doing so.

However, it is difficult to operate the planting clutch at a very short time from the end of the last seedling to the first row until the first planting of the next row is cut out. When the seedling table is stopped from the end, the seedling table must be re-executed and the positioning of the seedling table becomes troublesome.
In addition, if the seedling planting device is manually operated and the seedling platform is slowly moved laterally, it is possible to stop the seedling platform correctly at the stroke end. There are difficulties.

  The present invention has been made paying attention to such points, and can stop a seedling placing stand at an appropriate seedling loading position without requiring troublesome operations so that a seedling loading operation can be performed quickly. It is an object.

  The first invention is a rice transplanter configured to cut out and plant seedlings placed on a seedling table that reciprocally moves horizontally by reciprocating a fixed stroke one by one at the lower end of the seedling table by a planting mechanism. A lateral movement stopping means for automatically stopping the seedling bed at the stroke end is provided.

According to the above configuration, when a seedling is loaded on the seedling platform of the seedling planting device before starting the planting operation, an empty seedling platform can be operated without manual operation by operating the lateral movement stopping means. Can be stopped at the end of the lateral movement stroke. By placing and loading the seedlings on the seedling table that has been correctly stopped at the stroke end in this way, the seedlings can be cut out from the end of the front row of the placed seedlings when planting is started. .
Therefore, according to the first invention, the seedling setting table can be stopped at an appropriate seedling loading position without requiring troublesome operations, and the seedling loading operation can be performed quickly.

According to a second invention, in the first invention,
The power from the main transmission is configured to branch and transmit to the traveling transmission system and the planting transmission system, and the branched traveling transmission system is provided with a transmission blocking means, and the lateral movement is stopped when the traveling transmission system is in the transmission blocking state. The operation of the means is allowed.

  According to the above configuration, by cutting off the transmission of the traveling transmission system in a state where the main transmission is in an appropriate shifting state, the state in which the seedling planting device is driven laterally by driving the seedling planting device in the traveling stopped state, that is, It is possible to bring about a state in which the seedling platform is idled for seedling loading. If it is determined that it is in this state, it is regarded as seedling loading work, and the operation of the lateral movement stop means is allowed and the seedling platform is automatically stopped at the stroke end, so during planting work etc. An automatic stop of the seedling platform is not inadvertently executed.

The third invention is the above first or second invention,
It is configured to start the lateral movement of the seedling table by the switch operation and to activate the lateral movement stopping means.

  According to the above configuration, the seedling setting table can be automatically stopped at the stroke end only by the operator's switch operation, and the seedling loading operation before the planting operation can be started easily and quickly.

A fourth invention is the above first or second invention, wherein
A seedling planting device having a seedling platform and a planting mechanism is connected to the traveling machine so that it can be driven up and down, and the seedling platform is started to move laterally based on the ascent operation command of the seedling planting device, and the lateral movement stopping means is activated. It is comprised as follows.

  According to the above configuration, the operator can automatically stop the seedling platform at the stroke end just by issuing a raising operation command of the seedling planting device, and start seedling loading work without requiring a dedicated switch. Can do.

  FIG. 1 shows a side view of a rice transplanter with a fertilizer applied to a six-row planting specification, and FIG. 2 shows a plane of this rice transplanter. In this rice transplanter, a six-row seedling planting device 4 is driven by a hydraulic cylinder 5 at the rear of a traveling machine body 3 that has a front wheel 1 that can be steered and a rear wheel 2 that is fixed in orientation and travels by four-wheel drive. The basic structure connected so that raising / lowering is possible via the raising / lowering link mechanism 6 of the parallel quadruple link structure.

  A driver's seat 7 is provided at the rear of the traveling machine body 3, and a fertilizer device 8 is provided behind the driver's seat 7. Further, an engine 10 covered with a bonnet 9 is provided in a vibration-proof state at the front part of the traveling machine body 3. In addition, on both the left and right sides of the bonnet 9, a reserve seedling base 11 for accommodating the reserve seedlings in a plurality of stages is provided upright.

  A hollow front bumper 12 is horizontally fixed to the front end portion of the traveling machine body 3. As shown in FIG. 8, one end side of the front bumper 12 and the exhaust part of the engine 10 are connected in communication via a metal bellows 13, and an exhaust port 14 is provided on the other end side of the front bumper 12. The bumper 12 is also used as a muffler.

  A center mascot 16 for maneuvering the traveling vehicle body 3 is erected at the front end portion of the traveling vehicle body 3 in the next planting process at the time of planting traveling, with the traveling index formed on the surface T in the previous planting process as an aim. Yes. As shown in FIG. 6, the center mascot 16 is supported so as to be able to swing left and right around a fulcrum a facing forward and backward, and a weight 17 is provided at the lower end thereof. The center mascot 16 is always maintained in a vertical posture even if it is tilted to the left or right due to unevenness or the like, so that the aircraft can be operated with little misalignment with respect to the running index on the surface T. The pole 16a of the center mascot 16 is provided with a monitor 18 directed toward the driver. The seedling consumption state for each planting line in the seedling planting device 4 and the formation of running indicators provided on the left and right of the seedling planting device 4 are provided. Forgetting to put out the marker 15 for use, the fertilizer consumption state in the fertilizer application device 8, etc. are notified by lighting the lamp of the corresponding part in the monitor image, and the operator can easily recognize the notification contents and part and promptly perform appropriate processing. It is configured to do so.

  Steps 20 for getting on and off are provided on the left and right of the driving step 19 of the traveling machine body 3. As shown in FIG. 7, the step 20 for getting on and off is stored below the driving step 19 and is configured to be stepped by being pulled out laterally and swinging downward. Not only is it easy for women to get on and off, it is also difficult to slip when getting on and off in rainy weather or when getting on and off with muddy water on shoes.

  As shown in the transmission system diagram of FIG. 3, the output of the engine 10 is transmitted to a main transmission 21 comprising a hydrostatic continuously variable transmission (HST) capable of switching between forward and backward travel. The forward and reverse continuously variable transmission output from is input to the mission case 22 and is branched into the traveling system and the working system.

  The motive power of the branched traveling system is transmitted to the front wheels 1 and the rear wheels 2 after being gear-shifted into two stages of high and low by the auxiliary transmission mechanism 23, and the main transmission lever 24 that operates the main transmission 21. However, the auxiliary transmission lever 26 for operating the auxiliary transmission mechanism 23 is provided on the left side of the driver seat 7 while being provided on the left side of the steering handle 25 in the driving unit.

  Of the power of the work system branched in the mission case 22, only forward rotation power that causes forward travel is transmitted to the inter-company transmission mechanism 28 via the one-way clutch 27 and is shifted to a plurality of stages, and the shift power is transferred to the planting clutch. It is taken out via 29 and transmitted to the seedling planting device 4 in an axial manner.

  As shown in FIGS. 2 and 4, the seedling planting device 4 is provided with a feed case 30 to which work system power taken out from the traveling machine body 3 is transmitted, and six mat-like seedlings are placed in parallel. Seedling stand 31 that reciprocates horizontally by stroke, six sets of rotary planting mechanisms 32 for planting and planting seedlings one by one from the lower end of the seedling placed on the seedling platform 31, rearward left and right Are equipped with three planting cases 33 that are installed in parallel with two strips attached to each other, three leveling floats 34 that are arranged in parallel so that the planned planting location of Tabu T is leveled by two strips, etc. Yes.

  The power input to the feed case 30 is transmitted to the three planting cases 33 to drive the planting mechanisms 32, and the lateral feed screw shaft 35 and the seedling feed drive shaft 36 that are horizontally supported by the feed case 30. Is transmitted to. Each planting case 33 is provided with a small number of clutches 37 for planting a small number of strips for intermittently transmitting power to the left and right planting mechanisms 32, and a small number of clutch levers 38 provided corresponding to the minority strip clutch 37 are provided. By selecting and turning off some of the minority clutches 37, planting can be stopped in units of two, and it becomes possible to perform minority planting such as four-row planting and two-row planting. ing.

  As shown in FIG. 5, a reciprocating spiral groove 39 is formed in the transverse feed screw shaft 35, and a laterally moving member 40 that engages with the reciprocating spiral groove 39 is externally fitted to the transverse feed screw shaft 35. A seedling bed 31 is connected to the moving member 40. Accordingly, when the lateral feed screw shaft 35 is continuously rotated in a certain direction, the laterally moving member 40 is reciprocally moved laterally within the formation range of the reciprocating spiral groove 39, whereby the seedling bed 31 is reciprocally moved laterally with a constant stroke. It is.

  A pair of left and right drive arms 41 are connected to the seedling feed drive shaft 36, and a single passive lever 42 is provided on the seedling bed 31. Each time the seedling platform 31 reaches the end of the lateral feed stroke, the passive lever 42 enters the rotation trajectory of the left or right drive arm 41 that continuously rotates in a predetermined direction and presses the drive arm 41. The contact lever 42 is rotated in a predetermined direction by a predetermined angle, and the rotation of the passive lever 42 causes a predetermined amount of the seedling feeding belt 43 provided in the seedling placement portion of each strip in the seedling table 31. It is configured to be rotated downward and send the placed seedlings downward.

  Here, the timing at which the passive lever 42 is rotated by the drive arm 41 is the last seedling cutting operation timing immediately before the seedling platform 31 reaches the lateral feed stroke end, and the lateral movement in the opposite direction is started. It is set so as to be in the middle of the first seedling cutting operation timing at the time.

  The seedling feeding driving force transmitted by the passive lever 42 is transmitted to the seedling feeding belt 43 in units of two stripes via the three seedling feeding clutches 44, and each seedling feeding clutch 44 is linked to the minority number clutch lever 38. When the small number of clutch levers 38 are connected and operated, the seedling feeding clutch 44 corresponding to the article whose planting is to be stopped is operated to stop, and the seedling feeding on the planting suspension line is also stopped. Yes.

  The fertilizer application device 8 includes a resinous fertilizer hopper 45 for storing powdered fertilizer, three rotary roll-type feeding mechanisms 46 for feeding the fertilizer by a predetermined amount from the lower portion of the fertilizer hopper 45 in increments of two strips. Motorized blower 47 for conveying the fertilizer by wind, a groover 48 for each planting line attached to each leveling float 34, a supply ho 49 for guiding the fertilizer conveyed by wind to each groover 48, etc. A fertilizer groove is formed on each surface T near the lateral side of the planting position as the aircraft advances, and fertilizer is supplied and buried in the fertilizer groove. .

  A feeding clutch 50 for stopping the fertilizer feeding drive is provided corresponding to each feeding mechanism 46. Each feeding clutch 50 is linked to a small number of clutch levers 38 by wire, and the fertilization on the line where the planting is stopped by operating the small number of clutch levers 38 is stopped in units of two. .

  The seedling planting device 4 can be raised and lowered automatically in addition to being raised and lowered artificially. That is, as shown in the control block diagram of FIG. 9, the operation position of the planting lever 51 provided on the right side of the driver's seat 7 is detected by the potentiometer 52 and the sensor float SF of the center leveling float 34 is used. A vertically swinging displacement is detected by a potentiometer 53, and the potentiometers 52 and 53 and an electromagnetic control valve 54 for controlling the operation of the hydraulic cylinder 5 are connected to a control device 55 using a microcomputer. Is connected to an electric motor 56 for turning on and off the planting clutch 29 that intermittently powers the seedling planting device 4.

  On the right side of the steering handle 25, a neutral return-biased preferential elevating lever 57 is mounted so as to be swingable up and down, and a switch mechanism 58 that detects the up and down operation is connected to the control device 55. Has been.

The planting lever 51 can select the operation positions “up”, “neutral”, “down”, “planting”, and “automatic”, and the following operation is performed at each operation position.
"Rise"
The control valve 54 is switched to the raised position, the hydraulic cylinder 5 is driven to shorten, and the seedling planting device 4 is raised. When the seedling planting device 4 is raised to the upper limit height, this is detected by the upper limit switch S0, the control valve 54 is switched to neutral, and the ascent is automatically stopped, and the planting lever 51 is moved by the lifting link mechanism 6 moved to the upper limit. Forced to return to "neutral".
"Neutral"
The control valve 54 is switched to neutral and the raising / lowering of the seedling planting device 4 is stopped.

"Down"
When the seedling planting device 4 is in the elevation control mode in which the seedling planting device 4 is automatically moved up and down based on the vertical displacement of the sensor float SF, and the seedling planting device 4 is switched from the state above the rice field T to the “down” position, the sensor float SF is suspended. Is detected by the potentiometer 53, the control valve 54 is switched to lowering, and the seedling planting device 4 is lowered. When the seedling planting device 4 reaches the surface T, and the sensor float SF is in a reference posture that receives a predetermined ground pressure, the control valve 54 is switched to neutral and the descent stops. Thereafter, when the sensor float SF is displaced upward from the reference posture based on the increase of the ground pressure, the raising control is performed, and when the sensor float SF is displaced downward from the reference posture based on the decrease of the ground pressure, the descending control is performed and the predetermined ground pressure is maintained. Ascending / descending control is performed. However, in this “down” position, the planting clutch 29 is maintained in the disengaged state, and only the seedling planting device 4 is automatically raised and lowered.

"planting"
The seedling planting device 4 is automatically raised and lowered in the same manner as the “down” position, and the operation of engaging the planting clutch 29 via the electric motor 56 is performed, and is selectively used when planting traveling is performed.

"Automatic"
While providing the function of automatic lifting control of the seedling planting device 4 based on the sensor float SF similar to the above “planting” position, arbitrary lifting control (priority lifting control) by the priority lifting lever 57 and the main transmission lever 24 Automatic raising control (backup control) of the seedling planting device 4 based on detection of switching to the reverse position is executed as follows.

"Priority lift control"
When the planting travel of one stroke in the state where the planting device 4 is controlled to be lifted and maintained so as to maintain a predetermined ground pressure is finished and reaches the heel, the priority lifting lever 57 is operated once to the raised position “U”. Thus, the seedling planting device 4 is controlled to be raised up to the upper limit, and the planting clutch 29 is controlled to be turned off. When the aircraft direction change at the end of the wing is finished, the priority raising / lowering lever 57 is operated once to the lowered position “D” to return to the original automatic raising / lowering control mode, and the seedling planting device 4 is lowered to the ground. Is done. However, the planting clutch 29 is maintained in the disengaged state during this lowering. After the seedling planting device 4 is lowered, the priority raising / lowering lever 57 is operated once again to the lowered position “D”, so that the planting clutch 29 is engaged and controlled to resume planting.

"Backup Control"
If the main speed change lever 24 is switched to the reverse while the planting device 4 is in a descending state due to the dredging or the like, this is detected by the reverse detection switch Sb and the seedling planting device 4 is automatically raised to the upper limit. At this time, if the planting clutch 29 is operated to be engaged, it is controlled to be turned off together with the lifting operation, so that the rear portion of the seedling planting device 4 is prevented from hitting the cocoon or the like by the backward movement.

  The control device 55 includes a stroke end detection switch S1 for detecting that the seedling table 31 in the seedling planting device 4 has reached the stroke end of the lateral feed, and a neutral switch for detecting that the sub-shift lever 26 is neutral. S2 and a seedling loading switch S3 are connected.

  The seedling loading switch S3 is used when a seedling is loaded on an empty seedling setting table 31 in the seedling planting device 4 before the planting operation is started. Prior to this operation, the auxiliary transmission lever 26 is used. And the main speed change lever 24 is operated to an appropriate low speed position in the forward operation range. This enters the seedling loading control mode.

  As shown in FIG. 10, when the seedling loading control mode is entered, the planting clutch 29 is engaged via the electric motor 56 in a state where traveling is stopped, and the seedling planting device 4 is idled at a low speed and the seedling platform 31 is placed. Is moved sideways. In this case, when the seedling planting device 4 is operated idly, the planting mechanism 32 scratches the paddy surface T and scatters mud, so that all the minority clutch levers 38 are turned off and the minority clutch 37 is disengaged. The mechanism 32 is stopped so that only the seedling bed 31 is moved laterally. The small number of clutches 37 are provided with a fixed position stop function so that the planting mechanism 32 is automatically stopped at a rotation phase that is detached from the seedling outlet at the lower end of the seedling table 31 and does not enter the paddy surface T. It has become.

  When the seedling platform 31 reaches the left or right stroke end in the seedling loading control mode, this is detected by the stroke end detection switch S1, the planting clutch 29 is turned off via the electric motor 56, and the seedling platform 31 is moved. The lateral movement stops at the stroke end. In this way, when the seedling is placed and loaded on the seedling bed 31 that has been correctly stopped at the stroke end, when the planting is started next, the seedlings from the lateral end of the lowermost front row of the placed seedlings Cutting out can be performed appropriately.

  After the seedling loading is completed, all the small number of clutches 37 are engaged and operated, and then the planting lever 51 is temporarily operated to the “up” position, and further, the auxiliary transmission lever 26 is operated to the planting low speed position. The seedling loading control mode is canceled, and thereafter the normal control state is restored. The seedling planting device 4 is lowered to the planting height in conjunction with the operation of the planting lever 51 to the “planting” position and the planting clutch. 29 is inserted, and normal planting by the planting mechanism 32 is started.

[Other Examples]
(1) As shown in FIG. 11, the sub-transmission mechanism 23 is configured to be operated by a left-right movement at the neutral position of the main transmission lever 24, and the sub-transmission mechanism 23 is moved to the “low speed” state. The speed change range F (L) and the forward speed change range F (H) in a state where the auxiliary transmission mechanism 23 is switched to “high speed” are provided in parallel, and the main speed change lever 24 is provided on the right side. ), The planting travel speed can be arbitrarily selected, and the travel speed for movement can be arbitrarily selected by operating the main shift lever 24 in the left forward shift range F (H). The auxiliary transmission lever 26 in the previous embodiment can be omitted. In this case, in order to obtain a state in which the seedling planting device 4 is driven at a low speed while traveling is stopped in order to load seedlings before work, a forward shift range F (L) for planting and a forward shift range for movement The neutral switch indicates that the forward transmission range F (N) with the auxiliary transmission mechanism 23 in a neutral state is provided between F (H) and the forward transmission range F (N) is operated. By configuring so as to detect in S2, the seedling loading control mode described above can appear.

  (2) The planting lever 51 is operated to “rise” while the auxiliary transmission mechanism 23 is in the neutral position, or the priority elevating lever 57 is moved to the raised position “U” while the auxiliary transmission mechanism 23 is in the neutral position. Is operated once, the planting clutch 29 is engaged and operated so that the seedling placing table 31 starts to move sideways and enters the seedling loading control mode, and the dedicated seedling loading switch S1 is eliminated. You can also.

  (3) A lateral feed stop clutch (not shown) is provided in the transmission system to the lateral feed screw shaft 35 that laterally drives the seedling platform 31 so that the seedling platform 31 has reached the lateral feed stroke end. Based on the detection result, the lateral feed stop clutch can be turned off by using an actuator such as an electric motor or an electromagnetic solenoid to stop the seedling bed 31 at the end of the lateral feed stroke.

  (4) The lateral feed screw shaft 35 and the seedling feed drive shaft 36 for laterally driving the seedling bed 31 are driven by an electric motor (not shown) dedicated to lateral feed, and the planting mechanism 32 is moved from the traveling machine body 3. It is configured to be driven by power, and only the seedling platform 31 is laterally moved by the electric motor while the planting mechanism 32 is stopped, and the electric motor is operated based on the detection result that the seedling platform 31 has reached the stroke end. It is also possible to stop and stop the seedling raising table 31 at the end of the lateral feed.

Whole side view of rice transplanter Overall plan view of rice transplanter Transmission system diagram Development plan view showing transmission structure of seedling planting device Rear view showing the lateral feed structure of the seedling platform Rear view of center mascot Perspective view of step for getting on and off Perspective view showing engine exhaust structure Control block diagram Flow chart of seedling loading control mode The top view which shows the speed change operation part of another Example.

Explanation of symbols

3 traveling machine body 4 seedling planting device 21 main transmission 31 seedling rest 32 planting mechanism

Claims (4)

In the rice transplanter configured to cut out and plant the seedlings placed on the seedling platform that moves back and forth horizontally for a fixed stroke one by one by the planting mechanism at the bottom of the seedling platform,
A rice transplanter characterized by comprising a lateral movement stopping means for automatically stopping the seedling bed that has started lateral movement at the stroke end.   The power from the main transmission is configured to be branched and transmitted to the traveling transmission system and the planting transmission system, and the branched traveling transmission system is provided with transmission blocking means, and when the traveling transmission system is in the transmission blocking state, The rice transplanter according to claim 1, wherein the operation of the lateral movement stopping means is allowed.   The rice transplanter according to claim 1 or 2, wherein the seedling platform is started to move laterally by a switch operation and the lateral movement stopping means is activated.   A seedling planting device including the seedling platform and a planting mechanism is connected to a traveling machine so as to be driven up and down, and the seedling platform is started to move laterally based on an ascending operation command of the seedling planting device, and the lateral movement is stopped. The rice transplanter according to claim 1 or 2, wherein the rice transplanter is configured to activate the means.

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