JP2009072112A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transplanter which can control the non-smooth operation of a tine case 13 at a speed-changing point for largely increasing or decreasing the speed of a planting tine 9 to change the speed, can smoothen the movement of the tip portion of the planting tine 9, and can reduce a load on a planting driving shaft 10 to smoothen the planting work. <P>SOLUTION: This transplanter is equipped with a rotary planting portion 8 for pivotally supporting planting shafts 12 on both the ends of a rotary case 11 disposed on the planting driving shaft 10 of a planting transmission case 7, disposing a pair of planting tine 9-having tine cases 13 on the planting shafts 12, respectively, and picking up and planting seedlings from a seedling tray 6a. The transplanter is further equipped with a rotary balance weight 15 for balancing the rotation of each tine case 13 on the side opposite to the planting tine 9 through the planting shaft 12 of the rotary planting portion 8 to rotate together with the tine case 13. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a transplanter such as a rice transplanter that scrapes seedlings from a seedling stand and implants them in a field.

  Conventionally, a transplanter equipped with a rotary planting mechanism for scraping seedlings from a seedling table and planting them in soil as the rotating case rotates with a pair of planting claws provided at both ends of the rotating case is planted. An inconstant speed transmission mechanism such as a non-circular gear train or an eccentric gear train is incorporated in the rotating case so that the pawl moves periodically along an appropriate planting pawl path, and the planting pawl is supported by the inconstant speed transmission mechanism. It is comprised so that the attitude | position of a case (claw case) may be controlled. (For example, refer to Patent Document 1).

In addition, in recent transplanting machines, planting in consideration of the growth conditions (sunshine, aeration, etc.) of planted seedlings, etc., compared to the standard planting between the previous planting plants based on a standard plant of about 10-20 mm Planting between sparsely planted plants that have been expanded to about 20 to 25 mm between the plants promotes the division of seedlings, and planting between plants is performed to increase sales.
Conventionally, a transplanter that can perform standard planting and wide planting as described above has a speed change mechanism and a planting mechanism at constant speed in a transmission path of a transmission case that transmits engine power to the planting mechanism. A rotation speed change mechanism for rotating at a non-uniform speed is provided. This rotational speed change mechanism is configured to switch to constant speed rotation with the shifting operation to the small stock side (standard stock planting) of the inter-shaft transmission mechanism, and to switch to non-constant speed with the shifting operation to the wide stock side. (For example, refer to Patent Document 2).
JP 2004-180562 A JP 2004-313039 A

  The transplanting machine shown in Patent Document 1 is provided with a brake mechanism that takes a vibration impact due to the preceding rotation caused by the inertia of the planting drive shaft having a rotating case, and the planting claws are rattled over the entire range of the planting claw trajectory. There is an advantage that the planting work is performed without operation. However, the transplanter to which the brake mechanism is added as described above has a complicated structure in which the planting drive shaft is braked and released in a timely manner at a predetermined position of the planting claw trajectory. Has disadvantages such as being complicated.

  In addition, the transplanter shown in Patent Document 2 selects between standard planting and broad planting by switching the transmission lever of the mission case, and rotates the rotary planting unit at a non-uniform speed by a shifting operation to the wide plant side. Because it is configured, changing the planting operation speed during one cycle without changing the planting cycle of the planting mechanism, increasing the soil operation speed of the planting claw during planting, The seedling can be prevented from being dragged. However, this planting mechanism rotates the rotating case at a non-uniform speed, so that the fluctuation of the driving load increases due to the inertia of the planting claw at the fastest position set in the vertical position of the planting claw trajectory and the vibration increases. Has the disadvantage of

  That is, in any of the above planting mechanisms, at the acceleration / deceleration change point at which the planting claw locus is changed from acceleration to deceleration or from deceleration to acceleration, the excitation force due to the center of gravity displacement of the nail case provided with the planting claw As a result, there is a problem that the claw case performs a jerky operation or generates vibration due to inertia, and a large driving force is required to apply an impact load to the planting drive shaft through the rotary case. Furthermore, when performing planting between broad stocks by changing the speed of the rotary transmission mechanism without changing the planting cycle of the planting mechanism and changing the planting operation speed in one cycle at a non-uniform speed, the standard shown in FIG. In addition to the constant speed rotation planting claw trajectory for planting, as shown in FIG. 13, the planting claw speed at the vertical position of the planting claw trajectory is increased by the non-uniform motion as shown in FIG. There is a problem that the vibration force due to the displacement of the center of gravity increases further and the movement of the planting claw becomes a planting operation lacking smoothness due to the crumbling operation of the claw case.

  In order to solve the above problems, the transplanter of the present invention firstly supports the planting shaft 12 on both ends of the rotary case 11 provided on the planting drive shaft 10 of the planting transmission case 7, and A pair of nail cases 13 having planting claws 9 are provided on the attached shaft 12, and seedlings are scraped off from the seedling stage 6 a and planted in the soil by the planting claws 9 of the claw case 13 that rotates relative to the rotating case 11. In the transplanting machine provided with the rotary planting part 8 to be attached, the rotary balance weight 15 for balancing the rotation of the nail case 13 is nailed on the opposite side of the planting claw 9 around the planting shaft 12 of the rotary planting part 8. It is provided to rotate integrally with the case 13

  Second, the rotation balance weight 15 is provided between the rotation case 11 and the claw case 13 in the left-right direction of the machine body.

  Third, the rotation balance weight 15 has a claw case 13 at one end and is attached to the other end of the planting shaft 12 that is pivotally supported by the rotation case 11.

  Fourth, the rotating balance weight 15 is provided by partially wrapping the planting claw locus of the planting claw 9 of the adjacent claw case 13 in a side view.

  Fifth, the rotation balance weight 15 is characterized in that the rotation balance adjustment is performed in the most retracted posture of the fork 9a provided on the planting claw 9.

  The transplanter according to the present invention has the following effects. A rotation balance weight that balances the rotation of the claw case is provided on the opposite side of the planting claw around the planting axis of the rotary planting unit so that it can rotate integrally with the claw case. At the point where the planting claw speed is increased or decelerated at the position, vibration of the claw case due to jerky operation or inertia is suppressed, the movement of the tip of the planting claw is smoothed, and a shocking load is applied to the planting drive shaft. Reduces planting work smoothly.

  By providing a rotating balance weight between the rotating case and the claw case in the left-right direction of the machine, the rotating balance weight is centered around the claw case and the planting shaft in the weight space formed between the rotating case and the claw case. It is possible to configure the weights to be equal at the symmetrical positions. Further, the rotation balance weight can be rotated close to the rotation case without projecting greatly to the outside.

  The rotation balance weight has a claw case at one end and is attached to the other end of the planting shaft that is pivotally supported by the rotation case, allowing rotation with the claw case without considering interference with the adjacent claw case. The shape of the rotation balance weight can be set so as to optimize the balance. The center of gravity of the claw case and the rotation balance weight can be placed in the center of the rotation case in the middle of the planting shaft, reducing the thrust load of the planting shaft during rotation and smoothing the rotational movement of the rotation planting portion. Can be done.

  By providing the rotation balance weight so that it partially wraps at a position that does not interfere with the adjacent planting claw trajectory, the rotation balance weight can be easily balanced with the claw case at a symmetrical position about the planting axis. In addition, it is possible to prevent the interference with the adjacent planting claws and to form a compact configuration in the rotary planting part.

  When the planting claw is in the fastest position of the planting claw trajectory and the fork is in the most retracted posture, the claw case is used when the rotational balance weight facing through the planting shaft changes its posture at high speed by adjusting the rotational balance. Therefore, the planting operation with smooth movement of the planting claws can be performed smoothly.

  An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a passenger rice transplanter (transplanter), which is equipped with an engine 3 covered with a bonnet on the front side of a traveling machine body 2 having a front wheel 1 a and a rear wheel 1 b on the left and right sides, and a control unit 4 is installed in the rear. The planting device 6 is attached to the lifting mechanism 5 of the three-point link system configured at the rear of the machine body. This planting device 6 has a seedling mounting table 6a for tilting the front and rear of the mat seedlings in parallel to the left and right, and a plurality of planting described later at the lower end position of the seedling mounting table 6a. By planting the planting claws 9 of the rotary planting unit 8 formed at the rear end of the transmission case 7, the seedlings are scraped from the seedling mount 6a that reciprocates in the horizontal direction and planted in the field. be able to.

The planting device 6 extends the plurality of planting transmission cases 7 rearward at a predetermined interval in the left-right direction on a planting frame 6b attached to and supported by the rear portion of the lifting mechanism 5. A rotating planting portion 8 having a planting claw 9 is attached to and supported by a planting drive shaft 10 that is pivotally supported by projecting laterally from the rear end portion of the transmission case 7.
The rotary planting portion 8 includes a rotary case 11 whose intermediate portion is pivotally supported by the planting drive shaft 10, and a planting shaft 12 that is pivotally supported by both ends of the rotary case 11 and protrudes sideways. And a planting claw 9 is detachably provided on the front wall portion of the claw case 13. Further, the rotary planting portion 8 is provided with a rotation balance weight 15 according to the present invention with a configuration described later, and rotation based on the planting claw locus drawn by the tip of the planting claw 9 as shown in FIGS. We are trying to do smoothly.

First, the transmission configuration of the planting device 6 will be described. Engine power is input to the input shaft 17 of the mission case 16 by the configuration shown in FIGS. A planting input shaft (not shown) connected to each planting transmission case 7 of the planting device 6 is input by a PTO shaft 19 pivotally supported rearward to the final stage of a transmission mechanism such as a gear, and the planting drive The shaft 10 is driven to rotate.
The planting input shaft rotates the planting drive shaft 10 via a chain transmission mechanism built in each planting transmission case 7 and reciprocates the seedling stage 6a laterally via the seedling feeding mechanism. And the seedling feeding operation is performed.

When the planting drive shaft 10 is rotated by the transmission system described above, the rotary case 11 of the rotary planting portion 8 rotates in the direction of the arrow shown in FIG. 2, and the claw case 13 rotates based on this, so that the planting claw 9 is planted. By drawing a claw trajectory, each seedling can be scraped off from the seedling stage 6a to be planted in a field.
When the rotation case 11 rotates with the driving of the planting drive shaft 10 by the inconstant speed transmission mechanism in the rotation case 11 as in the conventional case, the rotation planting part 8 is an intermediate part that is housed in the rotation case 11. The gear rotates while revolving around the sun gear, the planetary gear rotates in the reverse direction, and accordingly the claw case 13 revolves around the planting drive shaft 10 and reverses around the planting shaft 12. To rotate at an infinite speed. Thereby, the nail | claw case 13 can draw the planting claw locus | trajectory shown in FIG. 12, FIG. 13 with the attitude | position which faces a front lower direction, even if the rotation case 11 rotates.

  That is, the planting claw trajectory reaches the planting position P in the soil while drawing a circular arc that swells forward after the tip of the planting claw 9 scrapes off the seedling from the lower end of the seedling stage 6a. Is set so as to draw a semicircular stationary locus (tip movement locus when traveling is stopped). Further, when one planting claw 9 adjacent in a pair scrapes off a seedling from the seedling stage 6a, the other planting claw 9 executes planting at the same time, and the other planting claw 9 serves as a seedling stage. When scraping off the seedling from 6a, the position and locus of the planting claw 9 are set so that one planting claw 9 performs planting substantially simultaneously with the seedling. Further, the planting claw 9 is configured so that the fork 9a to be installed can freely move forward and backward, and is brought into the most retracted posture when the seedling is scraped off. And it makes it possible to perform planting twice each time the rotation case 11 makes one rotation.

This planting claw trajectory depends on the transmission configuration of the mission case 19 described later in FIGS.
The acceleration / deceleration area and the fastest position are set. That is, in the planting claw trajectory (the planting claw stationary trajectory), the number of the planting claws 9 provided in each rotating case 11 is 2, in the present embodiment, the planting power transmission path is similar to the conventional one. Are provided with a speed change region D shown in FIG. ~ A, B ~ C and deceleration areas A ~ B, C ~ D are generated. As a result, the scraping movement speed and the soil movement speed of each planting claw 9 are increased, while the movement speed of the intermediate movement area holding the scraping seedling is reduced.

Further, the two fastest positions A and C exist in the respective acceleration regions D to A and B to C with a shift of about 180 degrees, and the two deceleration regions A to B and C to D have a shift of about 180 degrees and two. The latest position exists. One fastest position is set so that the planting claw 9 is immediately after planting the seedling, and the other fastest position is set to match when the planting claw 9 scrapes the seedling.
Note that the planting claw trajectory shown in FIG. 12 is a standard planting claw trajectory in which the planting claw speed is increased or decreased by the inconstant speed transmission mechanism in the rotating case 11. And a running locus can be drawn as FIG.

  Next, the mission case 6 will be described with reference to FIGS. The transmission case 16 has a configuration similar to that shown in Patent Document 2, and a motive power input to the engine input shaft 20 is rotatably supported on the engine input shaft 20. The intermediate transmission shaft 22 in parallel, the inter-variety transmission shaft 23 in parallel with the intermediate transmission shaft 22, a cylindrical shaft 24 rotatably supported by the inter-variety transmission shaft 23, and the cylindrical shaft 24 are rotatably supported. It is transmitted to the PTO shaft 19 via the tube shaft 25.

  A main clutch mechanism 26 is configured between the input shaft 20 and the cylindrical shaft 21, and traveling power and planting power are intermittently connected according to the turning-on / off operation. The cylindrical shaft 21 on the lower transmission side of the main clutch mechanism 26 is integrally provided with a gear 27 for extracting traveling power and a transmission gear 28 for extracting planting power, and the transmission gear 28 is a gear that is always meshed. The planting power is transmitted to the intermediate transmission shaft 22 via 29.

  A first inter-shaft transmission mechanism 30 is configured between the intermediate transmission shaft 22 and the transmission upper end of the inter-shaft transmission shaft 23. As shown in FIGS. 10 and 11, the first inter-shaft transmission mechanism 30 includes two gears 31 and 32 that are integrally provided on the intermediate transmission shaft 22 and a transmission gear 33 that is spline-fitted to the inter-shaft transmission shaft 23. It has a configuration with. The transmission gear 33 has three gear portions 33a, 33b, and 33c, and each gear portion 33a, 33b, and 33c selectively meshes with the two gears 31 and 32, so that a three-stage stock shift can be performed. It is possible.

  Further, a transmission gear 36 constituting a second stock transmission mechanism 35 is spline-fitted to the transmission lower side end portion of the cylindrical shaft 24, and the transmission gear 36 is rotatably supported by the intermediate transmission shaft 22. 11 and the position where the side meshing teeth 36a shown in FIG. 11 are meshed with the meshing teeth 25a of the cylindrical shaft 25, a two-stage speed change can be performed. Thus, six-stage stock adjustment can be performed by combining the two-speed shift by the second stock shift mechanism 35 and the three-speed shift by the first stock shift mechanism 30.

  The gear 37 is integrally provided with an eccentric gear 39 constituting an inconstant speed transmission mechanism 38. The eccentric gear 39 is always meshed with an eccentric gear 40 provided integrally with the cylindrical shaft 25. That is, when the gears 36 and 37 of the second inter-strain transmission mechanism 35 are engaged with each other, the power of the cylindrical shaft 24 is transmitted to the cylindrical shaft 25 via the unequal speed transmission mechanism 38. As a result, not only can the planting power be switched between constant speed and unequal speed, but the above-described switching between constant speed and unequal speed is performed using the speed change gear 36 of the second inter-strain transmission mechanism 35 as a rotational speed change mechanism. Making it possible. The rotation of the inter-stock transmission shaft 23 is transmitted from the bevel gear 39 to the PTO shaft 19 through a bevel gear 39a meshing with the bevel gear 39.

  The shift of the second inter-shaft transmission mechanism 35 is engaged with the shifter fork 43 of the shifter shaft 41 by tilting the shift lever 42 provided at one end of the shifter shaft 41 that is slidably supported by the transmission case 16. This can be done by moving the shifting gear 36 to the left and right. In addition, the first inter-shaft transmission mechanism 30 is shifted by moving the shift gear 33 engaged with the shifter fork of the shifter shaft to the left and right by tilting a shift lever (not shown) having the same configuration as described above. Yes.

Next, a running locus drawn by the planting claw 9 during traveling planting work by the transmission mechanism of the mission case 16 and the rotary planting unit 8 will be described with reference to FIG.
First, the running trajectory R1 shown in the same figure is set so that the planting claw speed is increased / decreased only by the inconstant speed transmission mechanism in the rotation case 11 of the constant speed shift without performing the inconstant speed shift, and the stock spacing is set wide (with respect to the vehicle speed). The planting speed of the planting claw 9 is reduced when the planting speed of the planting claw 9 in the soil is insufficient. Since the nail pulling locus r2 is gently drawn rearward from the planting position P, the planted seedling may be dragged by the planting nail 9.
On the other hand, the running trajectory R2 is a running trajectory when the stock spacing is set wider by adding or decreasing the planting claw speed shown in FIG. Since the planting claw 9 has the fastest position immediately after planting the seedling, the movement speed of the planting claw 9 in the soil is increased. This reduces the amount of forward movement of the planting claw 9 in the soil as the aircraft progresses, and draws the nail lifting locus r2 from the planting position P in an acute angle. Therefore, increase the lifting speed of the planting claw 9 planting the seedling. Interference between the planting claw 9 and the planted seedling can be avoided, and planting between broad stocks by nonuniform rotation can be performed satisfactorily.

As described above, the transplanting machine 1 that performs the planting operation while drawing the planting claw trajectory and the running trajectory has a rotational balance with the claw case 13 having the planting claw 9 around the planting drive shaft 10 of the rotary planting unit 8. The rotation balance weight (hereinafter simply referred to as a weight) 15 provided with a rotation balance structure is provided. In this way, especially when the planting drive shaft 10 is rotated at a non-uniform speed to control the planting claw trajectory, the vibration force caused by the displacement of the center of gravity of the claw case 13 provided with the planting claw 9 is offset by the weight 15, While reducing the vibration at the time of rotation of the attaching part 8, rotation of the planting drive shaft 10 is made smooth so that smooth planting work can be performed.
First, the rotation balance structure according to the first embodiment shown in FIGS. 2 to 4 will be described. The claw case 13 pivotally supported by the planting shaft 12 at both ends of the rotation case 11 is formed on the shaft support side (base portion). The side of the rotating case 11 and the claw case 13 are formed as shown in FIG. A weight 15 is interposed in the weight space 51.

The weight 15 includes a thick weight portion 52 and a flat plate-like attachment portion 53 extending to one side of the weight portion 52, and the weight portion 52 is adjacent to the weight space portion 51 while being attached to the claw case 13. It is located outside the planting claw 9 and has a square shape with both ends facing the top and bottom of the claw case 13 in side view, with the middle part as close as possible, and the outer peripheral shape is the planting drawn by the outer peripheral surface The locus at the time of attachment is formed in a square shape that does not contact the adjacent claw case 13.
The weight 15 installed in the weight space 51 is provided so as to be wrapped around a part of the planting claw locus in a side view, so that the weight 15 increases in weight while being compactly accommodated in the weight space 51. As a whole, the weight is equal at the symmetrical position about the nail case 13 and the planting shaft 12 as a whole.

As shown in FIGS. 2 and 4, the weight 15 has long-hole-like mounting holes 55, 56 on both sides in a state where the mounting portion 53 is fitted on the planting shaft 12 on the inner surface of the claw case 13. It is drilled and fixed to the claw case 13 by bolts 57, 58 inserted into the mounting holes 55, 56 and a mounting seat 59.
The weight mounting structure in the illustrated example is configured such that a bolt 58 is inserted and tightened in a state where the mounting seat 59 is superimposed on the mounting portion 53 of the weight 15 set as described above on the side surface of the claw case 13. 15 can be clamped and fixed to the claw case 13. Further, a positioning portion 61 is formed at the other end of the mounting seat 59 for positioning with a nut 60 having a cam-shaped outer peripheral surface. The mounting portion is attached to the nut 60 interposed with the positioning portion 61. The bolt 57 inserted into the mounting hole 55 of 53 can be fastened.

At this time, the weight 15 can be rotated within the range of the long holes of the mounting holes 55 and 56 with the planting shaft 12 as a fulcrum, and the center of gravity of the weight 15 and the center of gravity of the claw case 13 are centered on the planting shaft 12. The balance is adjusted by adjusting the position where the balance of the nut 60 is balanced, and the bolt 57 and the bolt 58 are fastened and the weight 15 is attached and fixed in a state where the outer peripheral surface of the nut 60 is in contact with the positioning portion 61 and positioned at this position. .
Thereby, the attachment adjustment of the weight 15 with respect to the center of gravity of the claw case 13 can be easily performed based on the position of the center of gravity of the claw case 13 and the planting shaft 12. In addition, it is desirable that the rotational balance adjustment is adjusted by setting the center of gravity of the weight 15 on an extension line connecting the center of gravity of the claw case 13 and the center of the planting shaft 12.

  Further, the rotation balance adjustment is desirably performed by adjusting the balance of the weight 15 in a state in which the fork 9a provided on the planting claw 9 is in the retracted position. That is, the retracted posture position of the fork 9a is at the highest speed position above and below the planting claw locus shown in FIG. 13, and the posture can be changed at high speed by balancing the weight 15 at this position. The large weight inertia of the claw case 13 when doing so acts so that the weights 15 opposed via the planting shaft 12 cancel each other. As a result, the claw case 13 can suppress the vibration even when the posture is largely changed at a high speed to smooth the movement of the tip of the planting claw 9, thereby reducing the impact load on the planting drive shaft 10. Planting work can be performed smoothly.

  In the transplanter 1 having the planting mechanism configured as described above, when the rotary case 11 rotates around the planting drive shaft 10 and the nail case 13 rotates around the planting shaft 12 based on this. The weight 15 for rotationally balancing the nail case 13 having the planting claw 9 and the planting shaft 12 is provided so as to rotate integrally with the claw case 13, so that the claw case 13 and the planting shaft 12 are provided. It is possible to equalize the weight balance with fulcrum as the fulcrum. As a result, the weight 15 can easily set the rotation balance position around the planting shaft 12 with respect to the claw case 13. In particular, at the posture change point where the planting claw 9 is largely repositioned at the vertical position of the planting claw trajectory described above, the movement of the tip of the planting claw 9 is suppressed by suppressing the vibration of the claw case 13 and the inertia vibration. And the like, and the impacting load on the planting drive shaft 10 can be reduced so that the planting operation can be performed smoothly.

  Next, another embodiment of the rotation balance structure will be described. In addition, description is abbreviate | omitted about the structure and effect | action similar to the thing of the said embodiment. First, in the rotation balance structure according to the second embodiment shown in FIGS. 5 and 6, the weight 15 is positioned and adjusted by the bolt 60 from the side surface to the outer surface on the front end side of the claw case 13 paired at both ends of the rotation case 11. And detachably attached and fixed. The weight 15 has a weight portion 52 having substantially the same shape as that of the above-described embodiment, a bolt 63 is inserted into a long hole-like attachment hole 62 formed in the attachment portion 53, and the outer side surface of the claw case 13. The rotation balance position is determined and fixed by fastening.

Accordingly, the weight 15 is attached and fixed to the outer surface of the nail case 13 and is wrapped with the tip planting claw locus of the adjacent planting claw 9 in a side view. An appropriate shape and thickness that are sufficiently close to each other without causing interference can be formed, and an optimum weight balance for the claw case 13 can be easily set.
In addition, it is possible to make a simple configuration that is easy to assemble and manufacture, and to easily install the existing transplanter 1 by a retrofitting operation without significantly changing the configuration of the rotary planting unit 8. There are advantages such as being able to.

  The rotation balance structure according to the third embodiment shown in FIG. 7 and FIG. 8 is such that the planting shaft 12 having the claw case 13 at one end is extended and protruded from the rotation case 11, and the weight 15 is attached to the mounting portion. By fixing the rotational balance position and inserting and fixing with the bolt 65, the drilled mounting hole is inserted and fixed, so that the weight 15 can be planted with the rotary case 11 while the rotary case 11 is sandwiched between the claw case 13 and the weight 15. A space formed between the case 7 and the case 7 is effectively used. Reference numeral 67 denotes a cam cylinder shaft that moves the fork 9a forward and backward, and is fixedly supported on the rotating case 11 side, and the planting shaft 12 is rotatably inserted.

  According to this configuration, the weight 15 is provided at the other end of the planting shaft 12 having the claw case 13 with the rotating case 11 interposed therebetween, so that the interference with the adjacent claw case 13 is not taken into consideration. The shape and attachment position of the weight 15 can be easily set so as to optimize the rotation balance. The planting shaft 12 can be provided with planting claws 9 and weights 15 having substantially the same weight on both sides so that the positions of the centers of gravity of the planting shaft 12 and the center of the planting shaft 12 coincide with each other. In addition, the center of gravity of both can be placed at the approximate center of the rotating case 11 in the middle of the planting shaft 12, and the thrust load during rotation of the planting shaft 12 can be suppressed, so that the durability of the shaft support portion is improved. There is a feature that the rotary planting portion 8 can perform a smooth rotational motion.

1 is an overall side view of a transplanter according to the present invention. It is a whole side view which shows the structure of the rotation planting part of a transplanter. FIG. 3 is a plan view of FIG. 2. It is a side view which expands and shows the rotation balance structure of FIG. It is a whole side view of the rotation balance structure concerning 2nd Embodiment. FIG. 6 is a plan view of FIG. 5. It is a side view which shows the structure of the principal part of the rotation balance structure concerning 3rd Embodiment. FIG. 8 is a plan sectional view of FIG. 7. It is sectional drawing which shows the structure of the mission case of a transplanter. It is a fragmentary sectional view which shows the structure of the principal part of a mission case. It is a fragmentary sectional view which shows the structure of the principal part of a mission case. It is a side view which shows the planting nail increase / decrease at the time of constant speed rotation. It is a side view which shows the planting nail increase / decrease at the time of non-uniform speed rotation. It is a running locus of planting nails.

Explanation of symbols

1 transplanter (riding rice transplanter)
2 traveling machine body 6 planting device 6a seedling stand 7 planting transmission case 8 rotating planting part 9 planting claw 9a fork 10 planting drive shaft 11 rotating case 12 planting shaft 13 claw case 15 rotating balance weight

Claims (5)

  A planting shaft (12) is pivotally supported at both ends of a rotation case (11) provided on a planting drive shaft (10) of the planting transmission case (7), and a planting claw ( 9) having a pair of claw cases (13), and scraping off the seedlings from the seedling stage (6a) by the planting claws (9) of the claw case (13) rotating relative to the rotating case (11) In the transplanting machine provided with the rotary planting part (8) to be planted in the soil, a nail case is placed on the opposite side of the planting claw (9) around the planting shaft (12) of the rotary planting part (8). A transplanter provided with a rotation balance weight (15) that balances the rotation of (13) so as to rotate integrally with the claw case (13).   The transplanter according to claim 1, wherein the rotary balance weight (15) is mounted between the rotary case (11) and the claw case (13) in the left-right direction of the machine body.   The transplanter according to claim 1, wherein the rotation balance weight (15) is provided at the other end of the planting shaft 12 having a claw case (13) at one end and pivotally supported by the rotation case (11).   The transplanter according to claim 1, 2 or 3, wherein the rotation balance weight (15) is partially wrapped in a side view with a planting claw locus of a planting claw (9) of an adjacent claw case (13). The transplanter according to claim 1, 2, 3 or 4, wherein the rotational balance weight (15) is subjected to rotational balance adjustment in the most retracted posture of the fork (9 a) provided on the planting claw (9).

Images