JP4562495B2 - Rotary seedling planting mechanism in rice transplanter - Google Patents

Description

  The present invention provides a rice transplanter in which at least two seedling plants with split claws are provided in one rotating case, and each seedling plant is in a posture in which the seedling plant is directed toward the seedling stage. The present invention relates to a rotary seedling planting mechanism configured to reciprocate up and down between the seedling platform and the field scene by rotating the rotating case.

  This type of rotary seedling planting mechanism is, for example, as described in Patent Document 1 and the like, in which a rotating case is fixed to a drive shaft that is horizontally supported by a transmission case in a rice transplanter. While providing a seedling plant with split claws at least at two equal parts on the circumference centered on the drive shaft, each seedling plant is provided in the rotating case during one revolution of the rotating case. An interlocking mechanism that rotates only once in the opposite direction is provided, and each seedling plant is reciprocated between the seedling stage and the field scene with the split claws facing the direction of the seedling stage. When moving, the interlocking mechanism is an inconstant speed interlocking mechanism in which the rotation of each seedling plant is delayed around the bottom dead center of the seedling plant, so that the divided claws in each seedling plant can be moved up and down. Long oval closed loop It is configured so as to draw a motion trajectory.

  In addition, when planting a rice planting machine equipped with the rotary seedling planting mechanism, there are cases where the planting density is set to 60-90 plants per 3.3 square meters in the field and 3.3 square meters in the field. In some cases, the number of planted strains per plant may be 37-50.

In this case, the former dense planting operation is performed by increasing the rotational speed of the rotating case relative to the forward traveling speed of the rice transplanter, and the latter sparse planting operation is performed by setting the rotational speed of the rotating case to rice transplanting. As is well known, it is performed by making it relatively slower than the former case with respect to the forward traveling speed in the machine.
JP 2000-139146 A

  However, in the rotary seedling planting mechanism, if the elliptical closed-loop motion trajectory that is vertically long by the inconstant speed interlocking mechanism in the rotating case is set in accordance with the former dense planting work, the rotational speed of the rotating case is set to rice transplanting. When the latter is sparsely planted by making it slower relative to the forward travel speed of the machine, the split nail enters the field scene with a delay from rising out of the field after seedling planting. By dragging in the state, the field scene has a large digging hole in front of the planted seedling.

  In addition, when the elliptical closed-loop motion trajectory that is vertically long by the inconstant speed interlocking mechanism is set in accordance with the latter sparse planting work, the rotational speed of the rotating case is set relatively to the forward traveling speed in the rice transplanter. When the former is densely planted by speeding up, the omission from the field scene after seedling planting in the split claws becomes too early, and the mud soil is lifted backward by the split claws. There will be a large digging hole behind the planted seedling.

  In the rotary type seedling planting mechanism, in order to make the excavation holes before and after planting seedlings as small as possible, the upper and lower elliptical closed loop motion trajectory by the inconstant speed interlocking mechanism is used for the former dense planting work. Two types, one with the dense planting specification set for the sparse planting and the other with the sparse planting specification set for the latter, must be produced.

  However, using two types of rotary seedling planting mechanisms in place of the inconstant speed interlocking mechanism not only increases the number of parts when manufacturing the seedling planting mechanism, but also manages parts management. There is a problem of increasing the number of steps and the number of parts assembling steps.

  The present invention has a technical problem to solve this problem with a simple mechanism.

In order to achieve this technical problem, claim 1 of the present invention attaches a rotating case to a lateral drive shaft that is rotated by power transmission from a power source, and a circle around the drive shaft of the rotating case. While providing a seedling plant with split claws at least in two parts on the circumference, each seedling plant is placed in the rotating case only once in the opposite direction during one revolution in the rotating case. A rotary provided with a non-constant speed interlocking mechanism that rotates and reciprocates up and down each seedling plant, and delays the rotation of each seedling plant around the bottom dead center of the reciprocating motion. in Shikinae planting mechanism, in the middle of the power source of the power transmission to the drive shaft, and the driver sprocket of the power source side and a driven sprocket which is the power transmission from the driver sprocket in the drive shaft side is provided, wherein Both sp A state of mounting Flip the socket 39 and 40, a movable structure changes in the state of being mounted without flipped, the both sprockets, configured eccentric sprockets and circular eccentric only appropriate dimensions the center of rotation The inside of the two sprockets is turned around with the axis extending through the center of rotation in the direction perpendicular to the eccentric direction as the center of rotation. Is delayed around the bottom dead center of the seedling plant, and when the two sprockets are turned over, the rotation of the rotating case is advanced around the bottom dead center of the seedling plant. Yes.

  In this configuration, when both transmission wheels are mounted so that the rotation of the rotating case is delayed around the bottom dead center of the seedling plant with respect to the respective shafts, the rotational speed of the rotating case is When the dense planting operation is performed to make the speed relative to the forward traveling speed of the rice transplanter, the rising omission from the field scene after the seedling planting in the divided claws is delayed, and the muddy soil is lifted backward by the divided claws. It is suitable for dense planting work.

  Then, from the state suitable for this dense planting operation, the transmission wheels are mounted upside down so that the rotation of the rotating case is advanced around the bottom dead center of the seedling plant with respect to each shaft. By doing this, when the sparse planting operation is performed in which the rotation speed of the rotating case is made relatively slow with respect to the forward traveling speed in the rice transplanter, the rising omission from the field scene after planting seedlings in the split claws becomes faster, It is suitable for sparse planting work because the distance of field scene dragging by the divided claws is reduced.

  In addition, when both transmission wheels are mounted so that the rotation of the rotating case is advanced around the bottom dead center of the seedling plant with respect to the respective shafts, the rotational speed of the rotating case is set to rice transplantation. When the sparse planting operation is performed with a slow speed relative to the forward traveling speed of the machine, the split nail is quick to rise from the field scene after seedling planting, and the drag distance of the field scene by the divided nail is small. Therefore, it is suitable for sparse planting work.

  Then, from the state suitable for this sparse planting work, the two transmission wheels are mounted upside down so as to delay the rotation of the rotating case around the bottom dead center of the seedling plant with respect to the respective shafts. As a result, when the rotation speed of the rotating case is set to be relatively dense with respect to the forward traveling speed of the rice transplanter, the rising omission from the field scene after planting the seedlings in the split claws is delayed, It is suitable for dense planting work because there is less splashing of mud behind the split claws.

  In other words, according to the present invention, by mounting the two transmission wheel bodies upside down with respect to their respective shafts, one rotary seedling planting mechanism is replaced with an inconstant speed interlocking mechanism in the rotary seedling planting mechanism. Without changing, it is possible to change from dense planting specification to sparse planting specification, or from sparse planting specification to dense planting specification.

  Therefore, according to the present invention, when the rotary seedling planting mechanism is manufactured, the number of parts can be greatly reduced as compared with the conventional case, and the number of parts management and the number of parts assembly can be greatly reduced.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings when an embodiment of the present invention is applied to a riding type multi-row planting rice transplanter will be described.

  In the figure, reference numeral 1 denotes an eight-row riding type rice transplanter. The rice transplanter 1 is mounted on a traveling machine body 2 supported by a pair of left and right front wheels 3 and a rear wheel 4 and on the rear part of the traveling machine body 2. And a seedling planting device 5 mounted so as to be capable of ascending and descending, and the traveling machine body 2 is equipped with an engine 6 and a control seat 7, which is configured to travel forward in the direction indicated by the arrow A. Yes.

  The seedling planting device 5 includes a transmission case 8 that transmits power from the engine 6, eight rotary seedling planting mechanisms 9 that are disposed in parallel in the transmission case 8 in the horizontal direction at appropriate intervals, and left and right It is constituted by a seedling table 10 which is inclined backward and downward so as to reciprocate, and a plurality of floats 12 which are arranged so as to slide on the surface of the field scene 11 between the seedling planting mechanisms 9. Yes.

  As shown in FIGS. 3 and 4, the transmission case 8 includes a first case 8b having a power input shaft 8a from the engine 6, and a pipe-like second case extending laterally from the first case 8b. 8c and four third cases 8d extending rearwardly from the second case 8c at an appropriate interval in the lateral direction. Each seedling planting mechanism 9 is horizontally oriented at the rear end of each third case 8d. The second case 8c is provided with transmission shafts 8e for transmitting power to the drive shafts 13 in the respective third cases 8d via the shafts 8f. Further, in the first case 8b, a main driving shaft 37 that transmits power from the power input shaft 8a via the bevel gear mechanism 38, and a power transmission mechanism 36 from the main driving shaft 37 to the transmission shaft 8e. Is provided.

  On the other hand, each seedling planting mechanism 9 is configured as shown in FIGS.

  That is, a side-view-type rotary case 14 is detachably fixed to both ends of the drive shaft 13 protruding from the third case 8d, and the rotary case 14 is attached to the rice transplanter 1 by the drive shaft 13. As shown by an arrow B in the side view, the sun gear 15 is rotatably fitted on the drive shaft 13 in the rotating case 14, and the sun gear 15 is rotated. The transmission case 8 is non-rotatably locked via a connecting member 35.

  An operation shaft 16 for a pusher, which will be described later, is pivotally supported in parallel with the drive shaft 13 at a position where the distance from the drive shaft 13 is equal at the outer peripheral portion of the rotating case 14, that is, both left and right end portions. A hollow planting shaft 17 is rotatably fitted on both operating shafts 16 in the rotating case 14.

  The end portions of the planting shaft 17 and the operating shaft 16 project outward from the side surface of the rotating case 14, and the projecting ends of the planting shafts 17 are opened to the upper surface with a light alloy such as an aluminum alloy. A hollow seedling plant 18 is attached with a bolt 19, and a split claw 20 is fixed to a boss portion 18 a at the tip of each seedling plant 18 in a posture position toward the seedling mounting table 10. On the other hand, the tip of the operating shaft 16 protrudes into the hollow portion of the seedling plant body 18, and a cam 21 for pushing operation is fixed to this portion. A lid 33 for sealing the inside of the plant 18 is attached.

  A planetary gear 22 having the same number of teeth as the sun gear 15 is fitted on each planting shaft 17, while the sun gear 15 and the planetary gear 22 are connected to the rotating case 14. An intermediate gear 23 that meshes at the same time is provided to form a gear train mechanism, and each planting shaft 17 is rotated once in the clockwise direction by the gear train mechanism during one counterclockwise rotation in the rotating case 14. Thus, each seedling plant 18 is configured to reciprocate between the seedling stage 10 and the field scene 11 in a state in which the divided claws 20 are held in a posture toward the seedling stage 10. ing.

  In this case, the sun gear 15, the planetary gear 22 and the intermediate gear 23 constituting the gear mechanism are offset as described in, for example, Japanese Patent Publication Nos. 63-20486 and 63-74413. By constructing a non-circular gear such as a core gear, the tip of the split claw 20 in each seedling plant 18 draws an elliptical closed-loop motion locus 24 that is long in the vertical direction as shown in FIG. It is composed.

  The boss portion 18a of each seedling plant 18 is provided with an extrusion shaft 25 that constitutes an extrusion tool so as to slidably penetrate in an axial direction extending parallel to the longitudinal direction of the divided claw 20, and its lower end. A pushing piece 26 having a U-shaped cross section is fixed so as to be close to the rear surface of the split claw 20, and the upper end of the pushing shaft 25 projects into the seedling plant 18. At the upper end, the tip of an extrusion lever 28 that is pivotally attached by a pin 27 so as to swing in the vertical direction in the seedling plant 18, and the extrusion shaft 25 is moved downward by the extrusion lever 28. It moves forward in the direction toward the tip of the split claw 20, and the push-out shaft 25 moves backward in the direction from the tip of the split claw 20 to the root by the upward rotation of the push-out lever 28. It is connected via a single 34.

  In the seedling plant 18, a spring means 29 for biasing the push lever 28 downward is provided between the push lever 28 and the lid 33. By contacting the base end with the outer peripheral surface of the push-out actuating cam 21, the tip of the split claw 20 in each seedling plant 18 is rotated by the rotation of the rotation case 14 in conjunction with the rotation of the rotation case 14. Accordingly, when the reciprocating motion comes close to the bottom dead center at the lower limit of lowering, the pushing lever 28 is rotated downward by the pressing force of the spring means 29, and each seedling body 18 is moved to the rotating case 14. The push-out lever 28 is configured to rotate upward against the spring means 29 when it moves upward from the bottom dead center of the reciprocating movement as it rotates.

  Further, the bottom plate 18b of the seedling plant 18 is integrally provided with a boss portion 31 projecting into the seedling plant body 18, and a soft elastic body 32 such as rubber can be attached to and detached from the boss portion 31. And the pushing lever 28 contacts the upper surface of the soft elastic body 32 at the end of the downward rotation.

  The power transmission mechanism 36 in the first case 8b of the transmission case 8 can be attached to and detached from the main drive shaft 37 on the power input shaft 8a side, as shown in FIGS. 3, 4, 8, and 9. A driven sprocket 39 as a driven transmission wheel fitted and attached to the transmission shaft, a driven sprocket 40 as a driven transmission wheel fitted and attached detachably to the transmission shaft 8e, and both the sprockets 39, 40 The two sprockets 39, 40 are configured so that they can be fitted over and attached to the shafts 37, 8e on which they are fitted and fitted, respectively.

  Further, when both the sprockets 39, 40 are constructed as eccentric sprockets whose center of rotation O is appropriately eccentric by the dimension e, the sprockets 39, 40 are not turned over as shown in FIG. , While the rotation of the rotating case 14 is delayed near the bottom dead center of the seedling plant 18, while the sprockets 39 and 40 are turned over as shown in FIG. It is configured to advance around the bottom dead center of the seedling plant 18.

  Inversion of the sprockets 39 and 40 is performed with the axes 39a and 40a extending through the rotation center O in the direction perpendicular to the eccentric direction as the rotation center.

  In this configuration, as the revolving case 14 revolves in the arrow B direction, the seedling plant 18 is centered on the planting shaft 17 in the direction opposite to the arrow B direction by the same rotation angle as the revolving angle. Since the seedlings 18 rotate, the seedlings 18 revolve in the vertical direction so that the divided claws 20 face the direction of the seedling stage 10. When descending from top to bottom on the side facing the top surface of the base 10, after dividing the seedling from the seedling mat 30 on the seedling mounting base 10 with the split claws 20 at the tip, The tip of the split claw 20 enters the farm scene 11 in the vicinity of the bottom dead center of the lower limit of the descent.

  At this time, the pushing lever 28 in the seedling plant 18 is rotated downward by the spring force of the spring means 29, so that the pushing piece 26 moves forward toward the tip of the split claw 20. One seedling at the tip of the split claw 20 is planted in the field scene 11 so as to be pushed out.

  When the seedling has been planted, the pushing piece 26 moves backward, and at the same time, the split claw 20 moves upward so as to come out of the field scene 11.

  And when this rice planting operation is carried out by dense planting in which the number of planted plants per 3.3 square meters is 80, 70 or 60, the rotational speed in the rotary case 14 is set in the direction of arrow A in the rice transplanter 1. This is done by relatively increasing the forward travel speed.

  In this dense planting operation, the sprockets 39 and 40 in the power transmission mechanism 36 are not turned over as shown in FIG. Since it slows down in the vicinity of the front and rear, and as a result, the rising omission from the field scene 11 after the seedling planting in the split claws 20 of each seedling plant 18 is delayed, the tip of the split claws 20 moves forward when the rice transplanter 1 travels forward. As shown by the solid line in FIG. 10, the running trajectory drawn is a curve indicated by reference numeral 24a for 90 shares, a curve indicated by reference numeral 24b for 80 shares, and a curve indicated by reference numeral 24c for 60 shares. , Because the division claw 20 is less likely to splash mud forward, it is suitable for dense planting work.

  Next, when the rice planting operation is performed in a sparse planting method in which the number of planted plants per 3.3 square meters is 50, 40, or 37, the rotational speed in the rotary case 14 is set in the direction of arrow A in the rice transplanter 1. However, if both sprockets 39 and 40 in the power transmission mechanism 36 are in the state as described above, the divided claws 20 of the seedlings 18 are separated. Since the rising omission from the farm scene 11 after planting of seedlings is delayed, the distance that the divided claws 20 are dragged in the state of entering the farm scene 11 is increased.

  Therefore, in the case of sparse planting work, both sprockets 39 and 40 in the power transmission mechanism 36 are turned over and mounted as shown in FIG.

  By doing in this way, the rotation of the rotating case 14 is accelerated around the bottom dead center of the seedling plant 18, and as a result, from the field scene 11 after planting the seedlings in the divided claws 20 of each seedling plant 18. Since the rising omission becomes faster, the traveling motion trajectory drawn by the tip of the split claw 20 when traveling forward on the rice transplanter 1 has a curve indicated by a reference numeral 24d at 50 stocks as shown by the dotted line in FIG. It becomes a curve indicated by reference numeral 24e at the time of the stock, and a curve indicated by reference numeral 24f at the time of the 37 stock, and the distance dragged in the state where the divided nail 20 enters the farm scene 11 is reduced. Fits.

  In other words, by adopting the above-described configuration, the densely planted seedling planting mechanism 9 can be changed to the loose planting specification by turning the both sprockets 39 and 40 upside down.

  Further, in this case, by rotating the eccentric direction of the rotation center O in both the sprockets 39 and 40 in the direction opposite to the drawing, the rotation of the rotating case 14 is advanced around the bottom dead center of the seedling plant 18. This sparse planting specification is changed to a dense planting specification in which the rotation of the rotating case 14 is delayed in the vicinity of the bottom dead center of the seedling plant 18 by mounting the two sprockets 39, 40 upside down. It may be configured as follows.

  By the way, although the said embodiment showed the case where the main transmission ring body and the driven transmission ring body in a claim were made into the sprockets 39 and 40, this invention replaces with these sprockets 39 and 40, and is an endless belt. You may comprise in the pulley wound around.

  Further, as shown in FIG. 11, the main transmission wheel body and the driven transmission wheel body in the power transmission mechanism 36 are gears 39 'and 40' meshing with each other, and both the gears 39 'and 40' are rotated. By constructing the center O ′ as an eccentric gear appropriately eccentric by the dimension e, when the gears 39 ′ and 40 ′ are not turned over, the rotation of the rotating case 14 is caused to rotate at the bottom dead center of the seedling 18. While being delayed or advanced in the vicinity of the front and rear, the rotation of the rotating case 14 is advanced or delayed in the vicinity of the bottom dead center of the seedling plant 18 when the both gears 39 'and 40' are turned over. can do.

  Even when the gears 39 'and 40' are turned upside down, the axes 39a 'and 40a extending in the direction perpendicular to the eccentric direction through the center of rotation O' as in the case of turning over the sprockets 39 and 40. Needless to say, it is performed with 'being the center of rotation.

  Further, as described above, even when the main transmission wheel body and the driven transmission wheel body are constituted by eccentric gears 39 'and 40' as shown in FIG. 11, the rotations of both gears 39 'and 40' are performed. By changing the eccentric direction of the center O ′ to the direction opposite to the drawing of FIG. 11, the rotation of the rotating case 14 is made to advance near the bottom dead center of the seedling plant 18, and this sparse planting specification is adopted. The planting specification may be configured to be changed to a dense planting specification in which the rotation of the rotating case 14 is delayed in the vicinity of the bottom dead center of the seedling plant 18 by mounting the sprockets 39 and 40 upside down. Of course.

It is a side view of a riding type rice transplanter. It is a top view of a riding type rice transplanter. It is an enlarged side view of the seedling planting device in FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is an enlarged side view of the seedling planting mechanism in the seedling planting device. FIG. 6 is an enlarged sectional view taken along line VI-VI in FIG. 5. FIG. 7 is an enlarged sectional view taken along the line VII-VII in FIG. 6. It is a figure which shows the state made into dense planting work. It is a figure which shows the state made into the sparse planting work. It is a figure which shows the running motion locus | trajectory with respect to a farm field. It is a figure which shows another embodiment.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 2 Traveling machine 3, 4 Wheel 5 Seedling planting device 8 Transmission case 9 Seedling planting mechanism 10 Seedling stand 11 Farm scene 12 Float 13 Drive shaft 14 Rotating case 18 Seedling planting 20 Dividing claw 21 Extrusion operation cam 25 Extrusion Shaft 26 Pushing piece 28 Pushing lever 8a Power input shaft 8e Transmission shaft 36 Power transmission mechanism 37 Main shaft 38, 40 Sprocket (transmission wheel)
41 Chiang

Claims (1)

A rotation case 14 is fixed to a lateral drive shaft 13 that is rotated by power transmission from a power source, and the rotation case 14 is divided into at least two equal parts on the circumference around the drive shaft 13. While providing the seedling plant body 18 provided with the claws 20, each seedling plant body 18 is rotated on the rotating case 14 only once in the opposite direction during one revolution in the rotating case 14, and each seedling plant body is rotated. In a rotary seedling planting mechanism provided with an inconstant speed interlocking mechanism that reciprocates the body 18 up and down and delays the rotation of each seedling plant 18 around the bottom dead center in the reciprocating motion. ,
In the middle of power transmission from the power source to the drive shaft 13, a main drive sprocket 39 on the power source side and a driven sprocket 40 that transmits power from the main sprocket 39 on the drive shaft 13 side are provided.
The sprockets 39 and 40 can be changed between a state in which they are mounted upside down and a state in which they are mounted without being turned over.
Both the sprockets 39, 40 are configured as eccentric sprockets whose center of rotation O is circularly eccentric by an appropriate dimension e, and the inside out of the sprockets 39, 40 passes through the center of rotation O to the direction of the eccentricity. When the sprockets 39 and 40 are not turned over, the rotation case 14 is rotated around the bottom dead center of the seedling plant 18 when the sprockets 39 and 40 are not turned over. On the other hand, when the sprockets 39 and 40 are turned over, the rotary seedling in the rice transplanter is configured to advance the rotation of the rotating case 14 around the bottom dead center of the seedling plant 18. Planting mechanism.

Images