JP2006087302A - Float supporting structure in planting implement of transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a float supporting structure in the planting implement of a transplanter, which facilitates swinging of a sensing float and improves leveling action effect by another float. <P>SOLUTION: In the transplanter with which at least one of a plurality of floats 10S and 10C for floating and supporting the planting implement 4 on a field surface is used as the sensing float 10C and the rise and fall of the planting implement 4 is controlled on the basis of the vertical swinging by the ground pressure variation of the sensing float 10C, the swinging fulcrum 29 of the sensing float 10C is arranged in the vicinity of the rear end of the sensing float 10C behind the swinging fulcrum 43 of the other all floats 10S except the sensing float 10C and the swinging fulcrum 43 is set in the vicinity of the longitudinal center of each float 10S. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a float support structure in a planting work machine of a transplanter such as a riding rice transplanter.

  Conventionally, a plurality of floats that float and support the planting work machine on the field scene are attached to a planting work machine for planting seedlings in a field, and at least one of the floats is detected and floated. In addition, a transplanting machine that controls the raising and lowering of the planting work machine based on the vertical swing due to the ground pressure fluctuation of the sensing float is known.

The float (reference numeral 35 in FIG. 6) is attached to a bracket (reference numeral 86 ′ in FIG. 6) attached to the top surface of the float (35) via an oscillating fulcrum (reference numeral 85 in FIG. 6). Reference numeral 87) is connected and supported on the planting part (reference numeral 4 in FIG. 1) side. The mounting surface (symbol B in FIG. 6) of the bracket (86 ′) is disposed in front of the fulcrum shaft (85), and the area on the rear side of the fulcrum shaft (always in contact with the field and effectively leveling action). It is configured so as not to be provided in the area indicated by symbol A in FIG. As a result, the portion (reference C ′ in FIG. 6) where the leveling action of the float (35) is performed becomes wider than before, and the pressing leveling action is improved.
JP 2000-316332 A

  In the case of improving the pressure leveling action of the float (35) as described above, the mounting surface (B) of the bracket (86 ′) is arranged not to be provided in the region (A), and the region (A) is arranged. It is desirable to take as long as possible. However, if the area (A) is taken as long as possible, the oscillating fulcrum of the float moves to the front side, and the sensing float requires a large force to oscillate the front end, compared to the conventional sensing float. Thus, there is a case where the vertical swinging with respect to the hard and soft state of the field and the unevenness is not smoothly performed, and in this case, there is a disadvantage that the automatic lifting control of the planting part (4) is not smoothly performed.

  The float support structure in the planting work machine of the transplanter of the present invention for solving the above-mentioned problems is provided in the planting work machine 4 for planting seedlings in the field, and the planting work machine 4 on the field scene. A plurality of floats 10S, 10C that support floating are attached to each other so that they can swing up and down, and at least one of the floats 10S, 10C is used as a sensing float 10C. In the transplanter that controls the lifting and lowering of the work machine 4, the swing fulcrum 43 of all the floats 10S other than the sense float 10C is provided in the vicinity of the front and rear centers of each float 10S, and the swing fulcrum 29 of the sense float 10C is The first feature is that it is provided in the vicinity of the rear end of the sensing float 10C behind the swing fulcrum 43 of the float 10S.

  Secondly, a float mounting frame 28 having a swing fulcrum 29 of the sensing float 10C and a float support arm 32 supported on the main body side of the planting work machine 4 so as to be swingable up and down are provided. It is attached to the float support arm 32 so as to be swingable. On the same axis as the connecting fulcrum 31 of the float mounting frame 28 and the float support arm 32, swing support points 43 of all other floats 10S except the sensing float 10C are provided. When the sensing float 10C moves up and down as the float support arm 32 swings, a guide member that translates the swinging fulcrum 29 of the sensing float 10C and the swinging fulcrum 43 of all the floats 10S other than the sensing float 10C. 36 is provided.

  Third, the float support arm 32 and the guide member 36 constitute a parallel link.

  According to the structure of the present invention configured as described above, the swing fulcrum of all the floats other than the sensing float is provided in the vicinity of the center of the front and rear of each float, so that the leveling performance of the field is high. The sensing float is provided with a rocking fulcrum in the vicinity of the rear end of the sensing float behind the rocking fulcrum of the other floats, so that the rocking of the front end is smoothly performed with a small force. For this reason, even if the front and rear lengths of the sensing float are shortened, the sensing float swings up and down with respect to the hard and soft state of the field and unevenness as much as the conventional sensing float.

  As described above, the front and rear lengths of the sensing float can be shortened, and the sensing float can be swung up and down in the vicinity of the planting point, so that the planting machine can be operated based on the field condition in the vicinity of the planting point. In addition to the advantage that the planting depth and planting posture can be controlled with high precision according to the field conditions, the lifting and lowering of the sensing float to the rear of the planting machine is reduced. There is an advantage that the overall length of the can be shortened.

  On the other hand, the sensing float is mounted on the main body side of the planting machine so that it can be moved up and down, and the sensing float is constructed so that the pivoting fulcrum of the sensing float and the pivoting fulcrum of all other floats except the sensing float are translated. Even when the elevation height of the sensor changes, the positional relationship between the swing fulcrum position of the sensing float and the swing fulcrum of all the floats other than the sensing float is maintained. By constructing a parallel link by the float support arm and the guide member, it is possible to easily construct a parallel movement mechanism between the swing support point of the sensing float and the swing support points of all other floats except the sense float. There is an effect.

  FIG. 1 is a side view of a riding rice transplanter which is a transplanter adopting the present invention. In this riding rice transplanter, a planting work machine 4 is connected via a lifting link 6 to the rear of the traveling machine body 3 supported by the front and rear wheels 1 and 2 as in the prior art. The planting work machine 4 is connected to the lifting link 6 side so as to be able to roll. A lifting hydraulic cylinder 5 for lifting is connected to the lifting link 6. As the elevating hydraulic cylinder 5 expands and contracts, the elevating link 6 swings up and down, and the planting work machine 4 moves up and down.

  The planting work machine 4 is provided with a seedling platform 7 on which seedlings for planting are placed. On the front (back) side of the seedling table 7, vertical frames 8 that constitute the work machine frame are provided on the left and right. Below the both vertical frames 8, a horizontal frame 9 in the left-right direction is integrally fixed to the vertical frame 8 and installed horizontally. A plurality of planter cases 11 are attached to the side of the horizontal frame 9. The horizontal frame 9 constitutes a transmission shaft case in which a transmission shaft for driving force transmission is housed.

  The planter case 11 is provided with a seedling planting portion 12. The planting part 12 is rotationally driven by the driving force from the planter case 11 side. By this rotational drive, the planting unit 12 scrapes off the seedling from the seedling mount 7 and plants it in the field. Below the planter case 11, a plurality of floats 10S, 10C are provided in the left-right direction (see FIG. 2). When the planting work machine 4 is lowered, the floats 10S and 10C are brought into contact with the farm field, and the planting work machine 4 is floatingly supported on the farm scene.

  In this riding rice transplanter, the planting work machine 4 is lowered, the floats 10S and 10C are grounded on the farm scene, and the planting part 12 is driven by rotating the planting part 12 while the traveling machine body 3 is running. It has a conventionally known structure in which seedlings on the platform 7 are scraped off and planted in a field. Since this rice paddy transplanter is not a simultaneous transplanting machine, seedlings are planted in the field after the scraping.

  Between the upper sides of the vertical frames 8, a left and right shaft 16 is rotatably supported. Upper arms 17 project from the left and right sides of the shaft 16. A lower arm 20 is pivotally supported on the lower side of the left and right vertical frames 8 so as to be swingable. The front ends of the left and right upper arms 17 and the intermediate portions of the left and right lower arms 20 are connected by vertical arms 18, respectively.

  A link arm 19 is pivotally supported at a position above the connecting point of the left and right vertical arms 18 with the lower arm 20. A support arm 21 is pivotally supported on the distal end side of the left and right lower arms 20 and the distal end side of the left and right link arms 19. A leveling rotor 13 is pivotally supported between the left and right support arms 21 via a rotor shaft 14.

  A lever 23 projects from the shaft 16. The lever 23 is inserted through a lever guide 24 fixed to the vertical frame 8. When the shaft 16 is rotated by the swing of the lever 23, the lower arm 20 swings up and down via the upper arm 17 and the rod 18, and the leveling rotor 13 moves up and down to adjust the height. The height of the leveling rotor 13 is adjusted in stages by engaging the lever 23 with any of a plurality of steps provided in the lever guide 24.

  As shown in FIG. 2, a plurality of leveling rotors 13 are provided over substantially the entire width of the planting work machine 4 in front of the planting unit 12 and behind the rear wheel 2. The leveling rotor 13 is rotationally driven by a driving force from a gear case provided at a substantially center in the left-right direction. The leveling rotor 13 is inserted into the field and rotated to perform leveling of the headland of the field after scraping, which has been rough due to turning of the traveling machine 3 during the planting operation, and plant seedlings in the field after leveling. It is possible.

  As shown in FIG. 2, the above-described float includes left and right side floats 10 </ b> S having an inverted U shape in a plan view and a central center float 10 </ b> C having a T shape in a plan view. As will be described later, each of the floats 10S and 10C is attached so as to move up and down with respect to the planter case 11, and is supported so as to be swingable back and forth.

  Since the leveling rotor 13 is positioned in front of the floats 10S and 10C, the space on the front side of the floats 10S and 10C is small, and the longitudinal lengths of the center float 10C and the side float 10S are substantially the same. However, the center float 10C has substantially the same overall length and overall width, and the length is shorter than the center float of the conventional riding rice transplanter, but it is wider, the pressure receiving area is secured, and the buoyancy is maintained. ing.

  As described above, seedlings are planted by the planting unit 12 provided in the planter case 11. However, the planter case 11 is floatingly supported on the field scene by the floats 10S and 10C. For this reason, the distance from the planting part 12 to the field scene is determined by the height positions of the floats 10S and 10C with respect to the planter case 11. Since the seedling planting depth is determined by the distance of the planting unit 12 from the field scene, the planting depth is adjusted by raising and lowering the floats 10S and 10C with respect to the planter case 11.

  Each of the floats 10S and 10C has high leveling (leveling) performance in a portion extending rearward with a large area to be grounded with respect to the farm scene. The joint of each leveling rotor 13 is located in front of a portion extending to the rear of the floats 10S and 10C. For this reason, the portion that is not leveled by the leveling rotor 13 is leveled by the high leveling performance of the floats 10S and 10C.

  The control valve that controls the operation of the above-described lifting hydraulic cylinder 5 is connected to the tip of the center float 10 </ b> C via a hydraulic pressure sensing arm 26. A control valve is operated via the hydraulic sensing arm 26 by the vertical swing of the center float 10C, the lifting hydraulic cylinder 5 expands and contracts, the lifting link 6 swings up and down, and the hydraulic sensing mechanism that the planting work machine 4 moves up and down is provided. It is configured. The center float 10C is a sensing float of the hydraulic pressure sensing mechanism.

  When the center float 10C swings up and down due to the contact pressure fluctuation caused by unevenness of the field by the hydraulic pressure sensing mechanism, the planting work machine 4 automatically adjusts so that the seedling planting depth and planting posture are constant. Even if there is unevenness in the field, the planting work can be performed with high accuracy.

  Depending on the field conditions, the center float 10C may swing and sink and push mud, or conversely, the center float 10C may swing and run from the field scene in a floating manner. In this case, the planting posture of the seedling is disturbed even if the hydraulic pressure sensing mechanism operates. For this reason, a hydraulic pressure sensitivity adjusting lever is connected to the center float 10C side.

  When the center float 10C swings and sinks and pushes mud or becomes floating from the farm scene by the hydraulic sensitivity adjustment lever, the center float 10C is placed almost horizontally on the farm scene with a certain sinking amount. The posture of the center float 10C can be adjusted so as to be grounded. By adjusting the posture of the center float 10C in accordance with the field conditions using the hydraulic sensitivity adjustment lever, the hydraulic sensing mechanism can effectively work to make the seedling planting depth and planting posture constant.

  As described above, since the hydraulic pressure sensing arm 26 is connected to the front end side of the center float 10C, in order to effectively operate the hydraulic pressure sensing mechanism, the front end side smoothly swings according to the field condition. Especially required. On the other hand, the side float 10S is not connected to the hydraulic pressure sensing mechanism side, and high leveling performance is particularly required.

  In order to smoothly swing the front end side of the center float 10C, it is desirable that the swing fulcrum of the center float 10C is located as far back as possible from the center float 10C. Further, in order to improve the leveling performance of the side float 10S, it is desirable that the swing fulcrum be as close to the center of the center float 10S as possible.

  Next, the mounting structure of each float 10S, 10C will be described in detail. As shown in FIGS. 3A and 3B, a bracket 27 having a substantially U shape in rear view is fixed to the center upper surface of the center float 10C in the left-right direction by bolts 28 on the rear end side. Yes. On the rear side of the bracket 27, a float mounting frame 28 having a triangular shape in a side view is pivotally supported via a fulcrum shaft 29 so as to be swingable. The fulcrum shaft 29 is provided at one apex portion of the float mounting frame 28, and the float mounting frame 28 is provided so that the fulcrum shaft 29 is located at the rear end and protrudes upward.

  A rear end side of the float support arm 32 is pivotally supported via a fulcrum pin 31 at the apex portion below the front side of the float mounting frame 28. The fulcrum pin 31 and the fulcrum shaft 29 have the same height with respect to the planter case 11. The front end side of the float support arm 32 is fixed to a horizontal axis 33 (see FIG. 2) in the left-right direction provided over substantially the entire width of the planting work machine 4. The horizontal shaft 33 is rotatably supported on the horizontal frame 9 side.

  A rear end side of the link arm 36 is pivotally supported via a pin 34 at an apex portion on the upper front side of the float mounting frame 28. The front end side of the link arm 36 is pivotally supported by a link bracket 37 via a pin 38 so as to be rotatable. The link bracket 37 is integrally fixed to a mounting seat 39 provided integrally with the horizontal frame 9 so that the link arm 36 and the float support arm 32 constitute a parallel link.

  The horizontal shaft 33 is provided with a planting depth adjustment lever 41. The horizontal shaft 33 is rotated by the swinging operation of the planting depth adjusting lever 41. As the horizontal shaft 33 rotates, the float support arm 32 swings, and the fulcrum shaft 29 and the fulcrum pin 31 translate in the vertical direction. The height of the center float 10 </ b> C with respect to the planter case 11 is changed by the parallel movement of the float mounting frame 28.

  A side float support arm 42 for supporting the side float 10S is also integrally attached to the horizontal shaft 33 corresponding to each side float 10S. The side float support arm 42 protrudes rearward at the same angle as the float support arm 32. The side float support arm 42 is provided with a fulcrum shaft 43 on the same axis as the pin 31.

  Brackets 44 are respectively provided at substantially central positions in the front-rear direction on the upper surface of the rearward extending portion of the side float 10S. The bracket 44 is swingably connected to the side float support arm 42 via the pin 43.

  As described above, the side float support arm 42 is attached to the horizontal shaft 33 at the same angle as the float support arm 32, and the fulcrum shaft 43 and the fulcrum pin 31 of the side float 10S are arranged on the same axis. When the attachment depth adjusting lever 41 is swung, the fulcrum shaft 43 and the fulcrum pin 31 of the side float 10S move up and down while maintaining the state of being arranged on the same axis.

  As described above, since the fulcrum shaft 29 and the fulcrum pin 31 of the center float 10C are translated in the vertical direction, the fulcrum shaft 29 of the center float 10C and the fulcrum shaft 43 of the side float 10S are translated in the vertical direction. The floats 10S and 10C move up and down with respect to the planter case 11. The height positions of the fulcrum shaft 43 of the side float 10S and the fulcrum shaft 29 of the center float 10C maintain the same state. The planting depth is changed by changing the heights of all the floats 10S and 10C with respect to the planter case 11.

  As described above, the swing fulcrum (fulcrum shaft 29) of the center float 10C is located near the rear end of the center float 10S. Since the side float 10S and the center float 10C have substantially the same length in the front-rear direction, the swing fulcrum of the center float 10C is located behind the swing fulcrum (fulcrum shaft 43) of all the side floats 10S. The swing fulcrum of the left and right side floats 10S is disposed in the vicinity of the front and rear centers of each side float 10S.

  Since each side float 10S is swingably supported in the vicinity of the front and rear centers, a region where the leveling action is effectively performed in contact with the field scene always behind the swing fulcrum is always formed. For this reason, the bracket 44 is included on the front end side in the region, but the region can be sufficiently long and has a high leveling action (leveling performance).

  On the other hand, since the center float 10C is swingably supported on the rear end side, the front end side swings smoothly with a small force. For this reason, although the center float 10C is shorter than the conventional center float, the center float 10C can be swung up and down as easily as the conventional center float.

  Accordingly, when the leveling rotor 13 is disposed on the front side of the floats 10S and 10C and the space on the front side of the floats 10S and 10C is small, even when using a relatively short center float 10C that fits in the space, As in the past, the posture of the center float 10C can be adjusted in accordance with the field conditions by the hydraulic sensitivity adjustment lever appropriately in accordance with the hard and soft state of the field, and the hydraulic pressure sensing mechanism operates appropriately with respect to the unevenness of the field. .

  In addition, since the longitudinal length of the center float 10C is short, the field position detection position R of the center float 10C is located in the vicinity of the seedling planting point P by the planting unit 12. Since the hydraulic pressure sensing mechanism is activated by the swing of the front end of the center float 10C, that is, the raising and lowering of the planting work machine 4 is controlled based on the field condition in the vicinity of the planting point P, and the planting depth and planting posture are controlled. It is controlled with high accuracy based on the field condition in the vicinity of the planting position. In addition, since the projecting amount of the center float 10C to the rear of the planting work machine 4 is reduced, the overall length of the machine body is shortened, and handling and handling of the machine body are facilitated.

  Further, the link arm 36 and the float support arm 32 are parallel links, the float support arm 32 and the side float support arm 42 are projected from the horizontal shaft 33 at the same angle, and the fulcrum pin 31 and the fulcrum shaft 43 of the side float 10S are the same. Even if the center float 10C and the side float 10S are moved up and down to adjust the planting depth, the center fulcrum (the fulcrum shaft 29) and the side float 10S are swung. Since the positional relationship of the fulcrum (fulcrum shaft 43) is maintained, the center float 10C smoothly swings up and down according to the unevenness of the field and the soft and soft state regardless of the planting depth.

  In order to maintain the positional relationship between the swing fulcrum of the center float 10C and the swing fulcrum of the side float 10S, the parallel movement mechanism that translates both the fulcrum shafts 29 and 43 is simply configured by the parallel link. Therefore, the support structure of each float 10S, 10C is not complicated.

It is a side view of the riding rice transplanter which abbreviate | omitted the side float. It is a principal part top view which shows the positional relationship of each float, a leveling rotor, and a rear wheel. (A) is a principal part side view which shows the attachment state of a center float, (b) is a principal part rear view which shows the attachment state of a center float. It is a principal part side view which shows the attachment state of a side float.

Explanation of symbols

4 Planting machine 10S Side float (float)
10C Center float (sensing float)
28 Float mounting frame 29 Support shaft (oscillation support)
31 fulcrum pin (connection fulcrum)
32 Float support arm 36 Link arm (guide member)
43 fulcrum shaft (oscillating fulcrum)

Claims (3)

  A plurality of floats (10S) and (10C) for floatingly supporting the planting work machine (4) on the field scene can be swung up and down on the planting work machine (4) for planting seedlings in the field. At least one of the floats (10S) and (10C) is used as a sensing float (10C), and the planting work machine (4) is moved up and down based on vertical swinging caused by fluctuations in ground pressure of the sensing float (10C). In the transplanter that controls the float (10C), the swing fulcrum (43) of all the floats (10S) other than the sense float (10C) is provided in the vicinity of the center of the front and rear of each float (10S). The float support structure in the planting work machine of the transplanter which provided the dynamic fulcrum (29) near the rear end of the sensing float (10C) behind the swing fulcrum (43) of the float (10S).   A float mounting frame (28) provided with a swing fulcrum (29) of the sensing float (10C), and a float support arm (32) supported on the main body side of the planting work machine (4) so as to be swingable up and down. The float mounting frame (28) is swingably mounted on the float support arm (32), and the sensing float is placed on the same axis as the connecting fulcrum (31) between the float mounting frame (28) and the float support arm (32). A swing fulcrum (43) for all the floats (10S) except for (10C) is provided, and the sensing float (10C) is raised and lowered when the sensing float (10C) is lifted and lowered with the swing of the float support arm (32). The transplanting machine according to claim 1, further comprising a guide member (36) for translating the swing fulcrum (29) and the swing fulcrum (43) of all the floats (10S) except the sensing float (10C). Float support structure in the planting work machine. The float support structure in the planting machine of the transplanter according to claim 2, wherein the float support arm (32) and the guide member (36) form a parallel link.

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