JP5191278B2 - Transplanter - Google Patents

Description

  The present invention relates to a transplanter provided with a leveling work machine for leveling a field in front of a planting work machine.

  A traveling machine body, a planting work machine connected to a rear part of the traveling machine body via a lifting link, a leveling work machine for leveling a farm field in front of the planting work machine, and a leveling work machine by turning on and off 2. Description of the Related Art Conventionally, a transplanter having a clutch mechanism for intermittently driving power to a power source and a linkage mechanism that is disposed between the lifting link and the clutch mechanism and that interlocks the on / off operation of the clutch mechanism with the lifting operation of the planting work machine It is known.

The transplanter has the advantage of high convenience because the on / off of the clutch mechanism is interlocked with the raising / lowering of the planting work machine. On the other hand, the transplanting machine has a merit that the clutch mechanism is turned off by the linkage mechanism. Since the working height, which is the rising height, is constant, it has a drawback that it is difficult to flexibly cope with changes in planting work height due to the field condition or the like. In order to remedy this drawback, a transplanter shown in Patent Document 1 in which an operating height adjusting mechanism capable of adjusting the operating height is provided in the linkage mechanism has been developed and is publicly known.
JP 2007-202532 A

However, depending on the situation, instead of adjusting the working height, the state switching from the interlocking state that interlocks the on / off operation of the clutch mechanism to the lifting operation of the planting work machine to the non-interlocking state that is not interlocked, or from the non-interlocking state to the interlocking state Depending on the state switching, it may be preferable to respond. In such a case, it is difficult to perform the state switching simply and quickly in the transplanter of the above-mentioned document in which the height of action is continuously changed, and there remains a problem. In addition, depending on the configuration of the working height adjustment mechanism, there is also a problem that the state cannot be switched to the non-interlocking state.
The present invention solves the above-mentioned problem, and the working height that is the elevation height of the planting work machine when the clutch mechanism for turning on and off the power to the leveling work machine is turned off can be adjusted. An object of the present invention is to provide a transplanter capable of easily and quickly switching the state of a non-interlocking state that is not interlocked with an interlocking state in which the on / off operation of the clutch mechanism is interlocked with the raising / lowering operation of the planting work machine. To do.

In order to solve the above-described problems, the transplanter of the present invention includes, firstly, a traveling machine body 3, a planting work machine 6 connected to the rear part of the traveling machine body 3 via a lifting link 4 so as to be movable up and down, and planting work. A leveling work machine 7 for leveling the field in front of the machine 6, a clutch mechanism 38 for intermittently supplying power to the leveling work machine 7 by an on / off operation, and the lifting link 4 and the clutch mechanism 38. A linkage mechanism 44 that links the on / off operation of the clutch mechanism 38 with the raising / lowering operation of the planting work machine 6, and the height of the planting work machine 6 when the clutch mechanism 38 is turned off by the linkage mechanism 44. In the transplanting machine in which the working height adjustment mechanism 49 capable of adjusting a certain working height is provided in the linkage mechanism 44, the release mechanism 51 for releasing the disengagement operation of the clutch mechanism 38 by the linkage mechanism 44 is provided as the working height adjustment mechanism 49. Provided separately from the release mechanism By 1, and the breakaway state the lifting operation of planting the working machine 6 do not interlock the on-off operation of the clutch mechanism 38, switching rows Uniatari with the interlocking state for interlocking, the linkage mechanism 44 lifting link 4 and the clutch mechanism 38, and a working height adjusting mechanism 49 is configured by making it possible to adjust and change the working length of the rod 44, and the support position P1 of the rod 44 on the clutch mechanism 38 side or the lifting link 4 side. , P2 can be changed, and the release mechanism 51 is configured .

  According to the transplanter of the present invention configured as described above, since the release mechanism for releasing the cutting action of the clutch mechanism by the linkage mechanism is provided separately from the action height adjusting mechanism, the clutch mechanism is turned off. It is possible to adjust the working height, which is the height of the planting work machine when moving, and to easily and quickly switch between the interlocking state and the non-interlocking state according to the situation by the release mechanism. There is an effect.

  In addition to connecting the elevating link and the clutch mechanism via the rod and configuring the operating height adjusting mechanism and the release mechanism by the rod, the on / off interlocking accuracy of the clutch mechanism for raising and lowering the planting work machine is improved. The switching accuracy from the interlocking state to the non-interlocking state or from the non-interlocking state to the interlocking state is also improved.

  FIG. 1 is a side view of a riding rice transplanter to which the transplanter of the present invention is applied. The riding rice transplanter mainly includes a traveling machine body 3 having a pair of left and right front wheels 1 and a rear wheel 2, and a planting work machine 6 connected to a rear portion of the traveling machine body 3 through a lifting link 4 so as to be movable up and down. And a leveling work machine 7 that is arranged behind the rear wheel 2 and performs leveling of the farm field in front of the planting work machine 6.

  A seedling platform 8 is formed on the rear side of the planting machine 6, and a planting unit 9 and a float 11 that contacts the field are arranged below the seedling platform 6. Is scraped off by the planting part 9 and planted in the field.

  The lift link 4 includes a top link 12 and a pair of left and right lower links 13 that are substantially parallel to the top link 12 to constitute a parallel link mechanism (link mechanism).

  The leveling work machine 7 includes a left-right rotor shaft 14 that is rotatably supported on the planting work machine 6 side, and a plurality of prisms that are formed in a polygonal prism shape (hexagonal column shape in the illustrated example) when viewed from the side. The leveling rotor 16 is provided. The plurality of leveling rotors 16 are mounted on the rotor shaft 14 so as to rotate integrally with the rotor shaft 14 while being arranged in parallel in the left-right direction. Then, the riding rice transplanter performs leveling of the field by grounding and rotating the ground leveling rotor 16 in a field that has been rough due to turning of the body during planting work, and the planting work machine 6 in the field after leveling. Plant seedlings.

Next, the support structure of the leveling work machine 7 will be described with reference to FIGS.
FIG. 2 is a main part side view showing a state where the planting work machine is lowered, and FIG. 3 is a main part side view showing a state where the planting work machine is raised. A horizontal frame 17 in the left-right direction is supported at the rear end portion of the elevating link 4 so as to be freely rollable. A vertical frame 18 in the vertical direction protrudes upward from the left and right ends of the horizontal frame 17.

  A support shaft 19 in the left-right direction is installed between the upper portions of the left and right vertical frames 18 so as to be rotatable in the front-rear direction. The rear end portion of 21 is integrally attached. The left and right rotor shafts 14 (leveling rotor 16) are suspended and supported at the front end portions of the left and right support arms 21 via support links 22 and vertical support rods 23, respectively.

  Further, the support shaft 19 is provided with an operation lever 24 (elevating operation tool, clutch operation tool), and by swinging the operation lever 24 back and forth, the left and right support arms 21 are swung up and down, and the planting work machine 6, the leveling work machine 7 (leveling rotor 16) is moved up and down. Incidentally, by fixing the operation lever 24 at a predetermined position, the leveling work machine 7 is positioned at a predetermined height corresponding to the forward / backward swing angle of the operation lever 24.

Next, a power transmission structure to the leveling work machine 7 will be described with reference to FIGS.
The power generated by the engine (not shown) of the traveling machine body 3 is transmitted to the rear axle case 26 that drives the rear wheels 2 through a transmission (not shown). The power in the rear axle case 26 is transmitted into a drive case 27 that is fixedly attached to the rear axle case 26 so that the inside communicates with the rear axle case 26.

  The power in the drive case 27 is transmitted to a gear case (not shown) installed near the center in the left-right direction of the leveling work machine 7 through a pair of universal joints 28 and a transmission shaft 29. The power in the gear case is transmitted to the rotor shaft 14 and drives the leveling work machine 7.

  4 and 5 are a plan sectional view and a front view showing a power transmission structure to the leveling machine. The power transmission structure to the rear axle case 26 and the power transmission structure from the rear axle case 26 to the drive case 27 will be described in detail. First, the power from the transmission side is rotatably supported by the rear axle case 26. At the same time, the front end portion is input to the input shaft 31 in the front-rear direction projecting forward from the rear axle case 26. An input gear 32 that rotates integrally with the input shaft 31 is provided in the middle of the input shaft 31 in the rear axle case 26, and a bevel gear 33 that rotates integrally with the input shaft 31 is provided at the rear end portion. The bevel gear 33 is configured to transmit power to the rear wheel 2 side.

  The input gear 32 is rotatably supported in the drive case 27 and the output in the drive case 27 is supported rotatably (in an idle state) on an output shaft 34 whose rear half projects rearward from the drive case 27. It always meshes with the gear 36. A cylindrical member 37 that rotates integrally with the output shaft 34 is externally mounted on the output shaft 34 so as to be movable in the axial direction of the output shaft 34, and the output gear 36 and the cylindrical member 37. Between the two, a leveling clutch (clutch mechanism) 38 is provided.

  The leveling clutch 38 is turned on by displacing the cylindrical member 37 toward the output gear 36 (incoming direction), while being turned off by displacing the tubular member 37 in the direction away from the output gear 36 (cutting direction). It is configured. When the leveling clutch 38 is in the engaged state, the output gear 36 rotates integrally with the cylindrical member 37, and the power of the input shaft 31 is transmitted to the output shaft 34. On the other hand, when the leveling clutch 38 is in the engaged state, the output gear 36 36 enters an idle state, and power transmission from the input shaft 31 to the output shaft 34 is interrupted. The tubular member 37 is always urged in the on-direction by a compression spring 39 mounted on the output shaft 34, and the engaged state of the leveling clutch 38 is maintained.

  The cylindrical member 37 is reciprocated in the axial direction of the output shaft 34 by the vertical swing of the operation arm 42 whose base end is supported by the drive case 27 via the rotation shaft 41. Specifically, by swinging the operation arm 42 upward, the tubular member 37 moves in the cutting direction against the elastic force of the compression spring 39 and the leveling clutch 38 is turned off, while the operation arm 42 By swinging 42 downward, the cylindrical member 37 moves in the entering direction and the leveling clutch 38 is engaged.

  That is, the leveling clutch 38 is turned on and off by the vertical swing of the operation arm 42, and the power transmission to the leveling work machine 7 is interrupted by the on / off operation of the leveling clutch 38. The operation arm 42 is always urged in the downward swinging direction by the action of the compression spring 39.

  As shown in FIGS. 2 and 3, the leveling clutch 38 configured as described above is connected to the operation lever 24 and the planting mechanism connected to the operation arm 42 via the leveling side linkage mechanism 43 connected to the operation arm 42. It is connected to the elevating link 4 via an additional side linkage mechanism (linkage mechanism) 44. The leveling side linkage mechanism 43 is disposed between the operation lever 24 and the leveling clutch 38 and is configured to interlock the on / off operation of the leveling clutch 38 with the lifting operation of the leveling work machine 7 by the operation lever 24. The planting-side linkage mechanism 44 is disposed between the lifting link 4 and the leveling clutch 38 and is configured to interlock the on / off operation of the leveling clutch 38 with the lifting operation of the planting work machine 6.

  The leveling mechanism 43 is a wire that connects the proximal end of the operation lever 24 and the distal end of the operation arm 42, and the wire 43 includes an outer wire 46 and an inner wire 47. One end of the outer wire 46 is fixed in the vicinity of the operation lever 24 in the planting work machine 6, and the other end is fixed above the tip of the operation arm 42 on the traveling machine body 3 side. On the other hand, one end of the inner wire 47 is fixed to the proximal end portion of the operation lever 24, and the other end is fixed to the distal end portion of the operation arm 42.

  When the leveling work machine 7 is raised to the non-working height by the operation lever 24, the inner wire 47 pulls up the tip of the operation arm 42 so that the operation arm 42 swings upward, and the leveling clutch 38 is turned off. On the other hand, when the leveling work machine 7 is lowered to the working height by the operation lever 24, the pulling up of the inner wire 47 is released, and the operation arm 42 swings downward by the action of the compression spring 39, and the leveling clutch 38 is moved. Activated.

  When the planting work machine 6 becomes higher than a predetermined height (working height), the planting side linkage mechanism 44 swings the operation arm 42 upward to disengage the leveling clutch 38, while planting work. When the machine 6 becomes lower than the operating height, the urging in the upward swing direction from the planting side linkage mechanism 44 to the operation arm 42 is released, and the leveling clutch 38 is engaged by the action of the compression spring 39.

  In this riding rice transplanter, in addition to the leveling side linkage mechanism 43 and the planting side linkage mechanism 44, the leveling side linkage mechanism 43 operates the leveling clutch 38 to be disconnected (by swinging the operation arm 42 upward). When the planting work device 6 is lowered to a position lower than the working height, the grounding clutch 38 is not engaged and operated by the planting side linkage mechanism 44 (the operating arm 42 is not swung downward). And an action height adjusting mechanism 49 arranged on the planting side linkage mechanism 44 and capable of adjusting and changing the action height, and a release mechanism 51 for releasing the cutting operation of the leveling clutch 38 by the planting side linkage mechanism 44. I have.

  Incidentally, when the leveling work mechanism 7 is lowered by the operation lever 24 when the leveling clutch 38 is operated to be disconnected by the planting side linkage mechanism 44, the wire as the leveling side linkage mechanism 43 is connected to the operation arm 42. Is operated only in the direction of swinging upward and not in the direction of swinging downward (acting only in the pulling direction), the upward swinging state of the operation arm 42 is maintained and the disengagement state of the leveling clutch 38 is maintained. Is done.

Next, based on FIGS. 2 and 3 and FIGS. 6 to 9, the configurations of the leveling mechanism 44, the accommodation mechanism 48, the working height adjustment mechanism 49, and the release mechanism 51 will be described in detail.
FIG. 6 is a side view of the main part when the planting work machine is in the lowest position in the interlocking state in which the on / off operation of the clutch mechanism is linked to the lifting operation of the planting work machine, and FIG. FIG. 8 is a side view of the main part when the planting work machine is in the highest position in the interlocking state in which the on / off operation of the clutch mechanism is interlocked with the operation. FIG. FIG. 9 is a side view of the main part when the planting work machine is in the lowest position in the non-interlocking state where it is not allowed to move, and FIG. It is a principal part side view at the time of machine top ascent.

  The planting side linkage mechanism 44 is a vertical rod that mechanically connects the elevating link 4 and the leveling clutch 38, and the upper end of the rod 44 is integrated from the front end (base end) of the left top link 12. The lower end portion is fixed to the rear portion of the operation arm 42 by the connecting plate 54 in the vertical direction, while being fixed to the connecting body 53 that is supported by the mounting seat 52 that is a square plate that is formed in a projecting manner. The

  A long hole 54a is formed in the connecting plate 54 along the direction in which the connecting plate 54 is formed. By inserting and supporting the connecting pin 42a protruding from the rear portion of the operation arm 42 in such a manner that it can turn back and forth and move in the forming direction (vertical direction) of the long hole 54a, the rod 44 is inserted and supported. Is connected to the operation arm 42 so as to be movable in the axial direction and swingable back and forth. This connecting structure constitutes the 48 accommodation mechanism described above. When the leveling clutch 38 is disengaged by the leveling side linkage mechanism 43, the connecting pin 42a is inserted into the long hole 54a even if the planting work machine 6 is lowered. Only by displacement, the rod 44 and the connecting plate 54 move downward with respect to the operation arm 42 so that the operation arm 42 does not swing downward, and the leveling clutch 38 is not engaged.

  When the planting work machine 6 is at the working height position, the connecting pin 42a is in contact with the lower end edge of the long hole 54a. Then, by raising the planting work machine 6 to a height higher than the working height, the rod 44 moves upward, the operation arm 42 is swung upward, and the leveling clutch 38 is disengaged. That is, the length from the position where the rod 44 is fixed to the connecting body 53 to the lower end is the working length, and when the working length is changed, the above-described working height is changed.

  The rod 44 upper end portion is fixed to the connecting body 53 by inserting the rod 44 upper end portion on which the screw portion 44a is formed into the connecting body 53 and inserting the connecting body 53 into the threaded portion 44a. This is done by screwing the upper end of the rod 44 to the connecting body 53 via a pair of upper and lower nuts 56, 56. In addition, by the action of the screw portion 44 a and the pair of nuts 56, 56, the screwing location, which is a location where the rod 44 is fixed to the coupling body 53, can be changed. The working length of can be changed. That is, the above-described working height adjustment mechanism 49 is constituted by the screw portion 44a and the pair of nuts 56, 56 and the like.

  The mounting seat 52 has a working place P1 and a non-working place P2 which are places (supporting positions of the rods 44) for supporting the coupling body 53. In addition, the action location P1 is formed in a position farther from the connection pin 42a of the operation arm 42 than the non-action location P2.

  By supporting the connecting body 53 at the operating position P1 of the mounting seat 52, as shown in FIGS. 6 and 7, the operation arm 42 is moved up and down (the leveling clutch 38 is turned on and off) as shown in FIGS. The state is switched to the interlocking state in which the operation) is interlocked.

  On the other hand, by supporting the connecting body 53 at the non-acting portion P2 of the mounting seat 52, as shown in FIGS. 8 and 9, even if the working length is changed to any length by the working height adjusting mechanism 49, When the attaching machine 6 is moved up and down, the connecting pin 42a of the operating arm 42 is simply displaced within the long hole 54a of the connecting plate 54. The state is switched to a non-interlocking state in which the clutch 38 on / off operation is not interlocked.

  That is, by separately configuring the support positions P1 and P2 of the coupling body 53 in the mounting seat 52 (support positions P1 and P2 of the rod 7 on the lifting link 4 side), the above-described function height adjustment mechanism 49 can be changed. The release mechanism 51 is configured. In addition, you may comprise the cancellation | release mechanism 51 by making it the structure which can change the connection position (support position) of the rod 44 in the leveling clutch 38 side (operation arm 42 side).

  According to the riding rice transplanter configured as described above, the switching between the interlocking state and the non-interlocking state can be performed easily and quickly by selectively switching the support position of the rod 44 on the lifting link 4 side or the leveling clutch 38 side. Therefore, it is more convenient than removing the planting side linkage mechanism 44 and the planting work machine 6 by releasing the planting side linkage mechanism 44 itself.

  As a result, when the front and rear wheels 1 and 2 are deeply fitted in the field in a soft field and the working height of the planting work machine 6 becomes higher than the working height, the switching between driving / stopping of the leveling work machine 7 is planted. There is an effect that it is possible to easily and quickly cope with a situation where it is better not to interlock with the lifting and lowering of the auxiliary work machine 6.

It is a side view of the riding rice transplanter to which the transplanter of the present invention is applied. It is a principal part side view which shows the state which the planting work machine fell. It is a principal part side view which shows the state which the planting work machine rose. It is a plane sectional view showing a power transmission structure to a leveling machine. It is a front view which shows the power transmission structure to a leveling machine. It is a principal part side view at the time of the planting work machine lowest descent in the interlocking state which makes the raising / lowering operation | movement of a planting work machine interlock | cooperate the on / off action of a clutch mechanism. It is a principal part side view at the time of the planting work machine highest rise at the time of the interlocking state which makes the raising / lowering operation of a planting work machine interlock | cooperate with the on / off action | operation of a clutch mechanism. It is a principal part side view at the time of the planting work machine lowest descent in the non-interlocking state which does not interlock the on-off operation of a clutch mechanism with the raising / lowering operation of a planting work machine. It is a principal part side view at the time of a planting work machine highest rise at the time of the non-interlocking state which does not link the on / off operation of a clutch mechanism with the raising / lowering operation of a planting work machine.

3 traveling machine body 4 elevating link (link mechanism, parallel link mechanism)
6 Planting work machine 7 Leveling work machine 38 Leveling clutch (clutch mechanism)
44 Planting side linkage mechanism (linkage mechanism, rod)
49 Action height adjustment mechanism 51 Release mechanism P1 Action location (support position)
P2 Non-acting point (support position)

Claims (1)

A traveling machine body (3), a planting work machine (6) connected to a rear part of the traveling machine body (3) via a lifting link (4), and a planting machine in front of the planting work machine (6). Between the leveling work machine (7) that performs leveling, the clutch mechanism (38) that intermittently powers the leveling work machine (7) by turning on and off, and the lift link (4) and the clutch mechanism (38) And a linkage mechanism (44) that is arranged to interlock the on / off operation of the clutch mechanism (38) with the raising / lowering operation of the planting work machine (6), and the clutch mechanism (38) is turned off by the linkage mechanism (44). In the transplanting machine in which the working height adjustment mechanism (49) capable of adjusting the working height, which is the height of the planting work machine (6), is provided in the linkage mechanism (44), the linkage mechanism (44) The release mechanism (51) for releasing the disengagement operation of the clutch mechanism (38) by the Separately from the adjusting mechanism (49), the releasing mechanism (51) allows the lifting / lowering operation of the planting work machine (6) to be interlocked with the non-interlocking state where the clutch mechanism (38) is not interlocked with the interlocking state. line switching and Uniatari, the linkage mechanism (44) is elevating link (4) and a rod (44) which connects the clutch mechanism (38), working length adjusted to be able to change the said rod (44) By configuring the working height adjustment mechanism (49), the support position (P1), (P2) of the rod (44) on the clutch mechanism (38) side or the lifting link (4) side can be changed. The transplanter which comprised the cancellation | release mechanism (51) .

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