JP2005323528A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter improved in efficiency of planting works as a whole and saving labor by preventing it from travelling without planting and thereby eliminating supplemental planting. <P>SOLUTION: This seedling transplanter has a seedling transplanting part liftably set on a travelling body, wherein a safety clutch for isolating driving force to a seedling planting device when overload larger than a predetermined load is loaded on the planting device of the seedling transplanting part is provided, a safety clutch working detector for detecting 'off' operation of the safety clutch and a travel-stopping device for stopping body running are also installed, and an interlocking device operating the travel-stopping device to be in travel-stopping state by being interlocked with detection of operation of the safety clutch by the safety clutch working detector is also installed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a seed transplanter such as a rice transplanter and belongs to the technical field of agricultural machinery.

Conventionally, as shown in Patent Document 1, when the safety clutch is disengaged due to overloading of the seedling planting device during the seedling planting operation, the accelerator down control is preferentially performed and the safety clutch is disengaged. There is a technology that reduces the engine output to the safety clutch while in the operating state.
JP 2002-293171 A

  In such a conventional technology, even if the safety clutch is broken due to overload during seedling planting work, the aircraft is still running and the planting work is in a continuous state. There was a problem that efficiency was reduced and efficiency was lowered.

  An object of the present invention is to prevent traveling without planting and to eliminate the need for supplemental planting, thereby improving the efficiency and labor saving of the entire planting operation.

  In order to solve the above problems, the present invention has taken the following technical means.

  That is, the present invention described in claim 1 is a seedling transplanting machine equipped with a seedling planting unit that can be moved up and down with respect to the traveling vehicle body. A safety clutch that cuts off the transmission to the seedling planting device due to the safety clutch, a safety clutch operation detecting device that detects that the safety clutch is in operation, and a travel stop device that stops the travel of the vehicle body And an interlocking device for operating the travel stop device to the travel stop state in conjunction with detection of the safety clutch being operated by the safety clutch operation detection device.

  During the seedling planting operation, when a predetermined overload is applied to the seedling planting device of the seedling planting unit, the safety clutch is disengaged and activated. When it is detected that the safety clutch operation detection device is in the safety clutch disengagement operation state, the travel stop device is automatically operated based on the detection result to stop traveling. As a result, traveling without planting is prevented, so that the need for supplemental planting is eliminated thereafter.

  In short, according to the present invention, since traveling without being planted can be prevented, the need for supplemental planting is eliminated, and the efficiency and labor saving of the entire planting operation can be achieved.

  An embodiment of the present invention will be described with reference to the drawings.

  FIGS. 1 and 2 show a 6-row Ueda transplanter as an example of a seedling transplanter, and a pair of left and right front wheels 2, 2 and rear wheels 3, 3 as a traveling wheel are installed in front of and behind a vehicle body 1. ing. An operation box 4 having an operation panel 4a on the upper surface and a steering device having a steering handle 5 and the like are installed in the front upper part of the vehicle body, and a seedling planting part 6 that can be moved up and down is provided in the rear part of the vehicle body. A driver's seat 9 is installed on the rear side of the control device, and an engine E that transmits power to each part of the rice transplanter is mounted below the driver's seat.

  The steering handle 5 is steered by steering the left and right front wheels 2 and 2 via an output shaft 17, a pitman arm 18, a steering rod 19 and the like which are decelerated and rotated from the steering shaft 16 by the turning operation. It has become.

  The rotational power of the engine E is transmitted from the engine output shaft 21 via the belt 22 to the input shaft 24 of the hydraulic continuously variable transmission (HST) 23, and from the output shaft of the HST 23 to the mission input shaft of the mission case 10. It has come to be communicated.

  The front wheels 2 and 2 are pivotally supported by front wheel support cases 25 and 25 which are provided so as to be able to turn to the side of the mission case 10, and the rear wheels 3 and 3 are rolling support rods 26. Are supported by rear wheel support cases 27 and 27 attached to both left and right ends of the transmission case, and the power is transmitted from the transmission device in the mission case 10 via the rear wheel transmission shaft 31. The rolling support rod 26 is pivotally supported by a rolling shaft 29 supported by a horizontal frame 28a that connects the rear ends of the left and right main frames 28, 28 so as to be tiltable in the left-right direction.

  An HST lever 32 is disposed near the operation box 4 and is configured to drive the HST 23 and to control forward and backward movement of the airframe by an operation in the front-rear direction across the “neutral” position of the HST lever 32. That is, the operating position of the HST lever 32 is detected by the HST lever sensor 33, and the speed is adjusted by changing the swash plate angle of the HST 23 by the HST electric motor 34 accordingly. When in the "neutral" position, the speed is zero. When the HST lever is operated in the forward operation range, the forward speed is set according to the distance from the neutral position, and when operated in the reverse operation range, the speed is adjusted according to the distance from the neutral position. It becomes the reverse speed of the speed.

  The grip portion of the HST lever 32 is provided with a button-type planting clutch on / off switch 35 for switching on and off the planting clutch of the seedling planting unit. Reference numeral 38 denotes a main clutch brake pedal.

  The seedling planting portion 6 is mounted on the rear portion of the vehicle body through a lifting link mechanism 7 so as to be able to be lifted and lowered by a telescopic operation of the lifting hydraulic cylinder 8.

  In addition, the seedling planting unit 6 includes a two-row planting device 13 and 13 having a seedling tank 11 that reciprocates left and right, and a planting basket 12 that cuts out one seedling and transplants it into the soil. ..., floats (side floats) 14 and 14 for leveling while sliding on the seedling planting surface, sensor floats (center floats) 14S and the like are provided.

  The power transmission to the seedling planting section 6 is transmitted into a planting clutch case 40 provided at the rear of the vehicle body via a work machine take-out transmission shaft 39 taken out from the mission device in the mission case 10. From there, it is transmitted to the seedling planting part 6 by the planting transmission shaft 41.

  The configuration in the planting clutch case 40 will be described. The planting clutch in which power from the work machine take-out transmission shaft 39 is input from the front side of the planting clutch case 40 and the planting clutch 43 is transmitted. An inter-shaft transmission gear mechanism 45 having a plurality of gear pairs that are provided in parallel with each other in the front-rear direction and that transmit power from the input shaft 42 to the planting clutch shaft 44 is provided. A slide key 46 for selecting which of the plurality of gears on the input shaft 42 side of the inter-variety transmission gear mechanism 45 is to be rotated integrally with the input shaft 42 is provided on the input shaft 42. Is operated to switch the transmission ratio from the input shaft 42 to the planting clutch shaft 44 so as to switch between planting strains by the seedling planting unit 6. A stock shift shifter 47 for operating the slide key 46 is provided on the input shaft 42 of the stock shift gear mechanism 45. A safety clutch 48 is provided at the planting clutch shaft 44 facing the inter-strain shift shifter 47, and the safety clutch 48 is used to bite stones when the seedling planting device 13 described later of the seedling planting unit 6 is operated. Thus, the transmission is cut off when a driving load to the extent that it is determined that a mechanical lock has occurred is applied to the planting clutch shaft 44. The load that the safety clutch 48 can cut is adjusted by rotating the adjustment nut 49 to move the safety clutch spring receiving plate 51 back and forth via the adjustment shaft 50 that rotates integrally with the adjustment nut 49. The compression load of 52 is changed.

  The planting clutch 43 includes a front drive clutch body 53 and a rear passive clutch body 54, and the drive clutch body 53 is attached to the planting clutch shaft 44 by the rotation of the planting clutch shifter arm 55. The transmission is turned on and off along the front and rear. The passive clutch body 54 is formed of a member integral with the output shaft 56 protruding from the rear side of the planting clutch case 40 on the extension line of the planting clutch shaft 44, and is transmitted from the output shaft 56 to the planting transmission shaft 41. It is a configuration. When the planting clutch shifter arm 55 is rotated, the fixed position stopping arm 57 that rotates together with the planting clutch shifter arm 55 is rotated by the rotation of the planting clutch shaft 44 and the output shaft 56. A configuration in which the planting clutch shifter arm 55 is further rotated to move the drive clutch body 53 to the non-transmission position forward when it comes to a position where it engages with an engagement groove 54a provided on the outer periphery of the passive clutch body 54. It has become. Therefore, the planting clutch 43 has a function of a fixed position stop clutch.

  The planting clutch shifter arm 55 is operated by driving an electric planting clutch motor 60 provided on one side of the planting clutch case 40. The pinion 61 of the planting clutch motor 60 is configured to mesh with a shifter gear 63 that rotates integrally with the planting clutch shifter arm shaft 62. By detecting the protrusion 64a of the cam plate 64 that rotates integrally with the planting clutch shifter arm shaft 62, a transmission detection switch 65 and a non-transmission detection switch 66 that detect the transmission state and non-transmission state of the planting clutch 43 are provided. Is provided.

  The drive clutch pawl 67 and the passive clutch pawl 68 of the planting clutch 43 are shaped as shown in FIG. 5 and are configured to be freely engaged and disengaged as shown in FIGS.

  In the transmission path from the output shaft 56 that rotates integrally with the passive clutch body 54 to the planting transmission shaft 41, a planting transmission shaft rotation sensor 70 that detects the rotation and non-rotation state of the planting transmission shaft is provided. Based on the non-rotation state detection result of the planting transmission shaft 41 by the planting transmission shaft rotation sensor 70, the HST lever sensor value is set to the neutral position by the operation of the HST electric motor 34 output from the control unit 71. It is configured to perform interlock control. Further, in the control circuit diagram shown in FIG. 8, the HST electric motor 34 and the planting clutch motor 60 are controlled by the control unit 71, and the control unit 71 includes the HST lever. -(Position) sensor 33, planting clutch on / off switch 35, planting transmission detection switch 65, planting non-transmission detection switch 66, planting transmission shaft rotation sensor 70, etc. are connected and based on various detection information. The HST electric motor 34 and the planting clutch motor 60 are controlled to operate. That is, the operation position of the HST lever sensor 33 is detected by the operation of the HST lever 32, and the HST electric motor 34 is operated according to the detected value, and the traveling speed is controlled to be changed. At this time, when the planting clutch on / off switch 35 is in an “on” operation state for the planting clutch 43, the planting clutch detection motor 65 is output to the planting clutch motor 60 so as to be turned on. When the safety clutch 48 is disengaged due to an overload on the seedling planting device 13 during this work, the planting transmission shaft rotation sensor 70 detects the non-rotating state of the planting transmission shaft 41, and the detection result Is output to the HST electric motor 34, and when the HST 23 returns to neutral, the vehicle is stopped from traveling.

  In FIG. 4, a fertilizer clutch 75 is provided on the input shaft 42 side in the planting clutch case 40, and the fertilizer applied on the extension line of the input shaft 42 from the input shaft 42 through the fertilizer clutch 75. The power is transmitted to the output shaft 76 and transmitted to the fertilizer feeding portion of the fertilizer applying device via a crank arm 77 that rotates integrally with the fertilizer output shaft 76.

  Next, the embodiment shown in FIGS. 10 and 11 will be described.

  On the input side of the control unit 71, an HST lever sensor 33 for detecting the operation position of the HST lever 32, a front / rear tilt sensor 80 for detecting the front / rear tilt of the fuselage, and an operator are driven while sitting in the driver's seat. A seating sensor 81 for detecting whether or not the vehicle is connected is connected, and the operation of the HST electric motor 34 provided on the output side of the control unit 71 is controlled based on these various types of detection information. That is, the operation position of the HST lever sensor 33 is detected by the operation of the HST lever 32, and the HST electric motor 34 is operated according to the detected value, and the traveling speed is controlled to be changed. Therefore, when the inclination angle in the front-rear direction of the aircraft is greatly inclined to a predetermined value or more, the operating speed (rotational speed) of the HST electric motor 34 at the time of shifting (operation) is based on the detection result of the inclination angle by the front-rear inclination sensor 80. Controlled to be slow. As a result, it is possible to avoid a danger due to a sudden change in traveling speed when the vehicle crosses the ridge and the like, and to ensure safety. Further, when the operator is not seated in the driver's seat, it is dangerous if there is a sudden speed change when exiting with a saddle or the like, and therefore, based on the detection result of the seating sensor 81, the HST electric motor 34 The operating speed is down-controlled. Further, when the aircraft is moving backward, it is necessary to confirm the rear and suddenly changing (increasing) the traveling speed is dangerous. Therefore, when the HST lever sensor value is in the “reverse” state, the change in traveling speed during shifting is reduced. To improve safety.

  In the control means shown in FIG. 12, when the forward / backward (or left / right) inclination sensor 80 detects an inclination of a predetermined angle or more of the fuselage, the gear ratio of the HST 23 is changed at the time of shifting in the low speed region as shown in FIG. In the “engine priority mode” in which the engine speed increases, the engine is output to the accelerator motor 82 and the HST electric motor 34 based on the HST lever sensor value. Further, when the inclination of the airframe does not reach a predetermined angle or more, in the “normal mode” as shown in FIG. 13B, the accelerator motor 82 and the HST electric motor are based on the HST lever sensor value. (Refer to the flowchart shown in FIG. 14). In short, when the fuselage is tilted more than a predetermined angle, the engine rotation is preferentially increased when shifting to a high speed side, so that shifting (acceleration) is performed gradually according to the traveling load. Sufficient travel driving force can be obtained and danger can be avoided in advance.

  Further, as shown in FIG. 15, the engine priority mode (a) is set so that the change of the engine speed becomes larger with respect to the change of the gear ratio of the HST 23 at the time of the shift regardless of the shift range. When the forward / backward tilt sensor 80 detects that the front / rear tilt angle of the airframe is “previously rising” by a predetermined angle or more when the vehicle is climbing up to the track, the engine priority mode (a) It may be output to the accelerator motor 82 and the HST electric motor 34 (see the flow chart shown in FIG. 16), and control may be performed so that the movement on the accelerator side is larger than the movement of the HST lever. According to this, a sufficient traveling driving force can be obtained regardless of the speed change range, so that it is easy and safe to go over the ridge and climb the hill.

  In the embodiment shown in FIGS. 17 and 18, when the bonnet 85 swings and opens around the fulcrum P, the parking brake 86 works in conjunction with the opening operation so that the parking brake 86 works. Yes. Since the controller 88, the fuse box 89, the battery 90, and the like are built in the bonnet, these maintenance operations can be performed safely without running the aircraft.

  The embodiment shown in FIGS. 19 and 20 will be described.

  Connected to the input side of the control device 91 are a front / rear inclination angle sensor 92 for detecting a change in the unevenness in the front / rear direction of the field and a planting part rolling sensor 93 for detecting the right / left inclination of the seedling planting part. The sensor value of the planting portion rolling sensor 93 is input to the control device 91, and the control device 91 operates the output side planting portion rolling electromagnetic valve 94 to perform rolling control. . When the planting part rolling sensor value changes greatly or changes frequently, the locking solenoid 95 is actuated to lock the rolling state of the rear wheels so as to stabilize the running posture. Further, when the unevenness of the front and rear of the field is drastically changed and the front / rear inclination angle changes greatly or changes frequently, the locking solenoid 95 is operated based on the detection value of the front / rear inclination angle sensor 92 to lower the rear wheel. The ring state is locked so as to maintain good straightness.

Side view of rice transplanter Same as above Top view of the main part Side sectional view of planted clutch case Operational view of planting clutch main part (a) (b) Side view of planting clutch case and planting clutch motor Same as above Control block diagram Flow chart Control block diagram Flow chart Control block diagram Relationship graph between engine speed and HST gear ratio Flow chart Relationship graph between engine speed and HST gear ratio Flow chart Side view of part of rice transplanter Same as above Control block diagram Flow chart

Explanation of symbols

1 Traveling body 6 Seedling planting part 13 Seedling planting device 23 HST
32 HST lever 33 HST lever sensor 34 HST electric motor 35 Planting clutch on / off switch 40 Planting clutch case 41 Planting transmission shaft 43 Planting clutch 48 Safety clutch 60 Planting clutch motor 65 Planting transmission Detection switch 66 Planting non-transmission detection switch 70 Planting transmission shaft rotation sensor 71 Control unit

Claims (1)

  In a seedling transplanting machine equipped with a seedling planting unit that can be moved up and down with respect to the traveling vehicle body, the seedling planting device of the seedling planting unit is transmitted to the seedling planting device due to overload exceeding a predetermined level. A safety clutch operation detecting device for detecting that the safety clutch is "disengaged" and a travel stop device for stopping traveling of the vehicle body are provided. A seedling transplanter characterized in that an interlocking device for operating the travel stop device in a travel stop state is provided in conjunction with detection of operation.

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