JP2008125480A - Transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transplanter equipped with a soil-leveling device, shortening the distance between a traveling machine body and transplanting implement, without reducing the sensing accuracy of a sensing float. <P>SOLUTION: This riding type transplanter automatically controlling the lifting up and down of the transplanting implement 3 joined at the rear part of the traveling machine body 1, in accordance with the position change of the sensing float 8 installed as rocking freely up and down at the lower part of the transplanting implement 3 and also equipped with the soil-leveling device 9 between the traveling machine body 1 and transplanting implement 3 is provided by supporting the sensing float 8 rocking freely up and down at a front side fulcrum and also arranging the rocking fulcrum S of the sensing float 8 at the upper direction of the soil-leveling device 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a transplanter such as a riding rice transplanter, and more particularly to a transplanter including a leveling device between a traveling machine body and a planting work machine.

  In general, a transplanter such as a riding rice transplanter has a sensing float that can swing up and down at the bottom of a planting work machine for planting seedlings in a field, and a planting work machine according to a change in posture of the sensing float. By controlling the elevation automatically, the variation in planting depth is suppressed.

Moreover, the transplanter provided with leveling apparatuses, such as a leveling rotor, between a traveling body and a planting work machine is also known (for example, refer patent document 1). In such a transplanter, since leveling can be performed simultaneously with planting, the planting accuracy and work efficiency can be improved.In particular, the leveling effect by the leveling device is remarkable in the headland where the field surface is rough due to the aircraft turning. Yes, planting accuracy can be greatly improved.
JP 2004-147619 A

  By the way, in such a transplanter, in order to perform the accurate surface detection while suppressing excessive flutter of the sensing float, as shown in FIGS. 3 and 4, the swing fulcrum S and the sensing point of the sensing float 101 are detected. A certain distance is required between P and the position of the front end of the ground contact area of the sensing float 101. However, if this distance is to be satisfied with a conventional transplanter, it is necessary to extend the sensing float 101 forward. There is a problem that the distance between the traveling machine body 102 and the planting work machine 103 and the distance between the leveling device 104 and the planting work machine 103 become long.

  In the conventional transplanter, if the distance between the swing fulcrum S of the sensing float 101 and the sensing point P is increased, the sensing point P becomes far from the seedling planting position N. When the angle is tilted back and forth, there is a problem that a difference occurs in height between the sensing point P and the seedling placement position N, and a mechanism for correcting the difference is required.

  3 and 4, reference numeral 105 denotes a control valve for switching the hydraulic operation state (up, neutral, and down) of a hydraulic cylinder for raising and lowering the planting machine (not shown), and 106 is a control valve 105 and a sensing float. A sensing link mechanism 107 that links 101, and a rod 107 that shifts the operating range of the sensing link mechanism 106 (control valve 105) in accordance with planting depth adjustment (float fulcrum height adjustment).

The present invention was created for the purpose of solving these problems in view of the above circumstances, and a planting work machine connected to the rear part of the traveling machine body is provided at the lower part of the planting work machine. In a transplanter that automatically moves up and down according to a change in posture of a sensing float that can swing up and down, and that has a leveling device between the traveling machine and the planting work machine, the sensing float is moved up and down at the front fulcrum. The swinging fulcrum of the sensing float is disposed above the leveling device while being supported so as to be swingable. In this way, the space above the leveling device can be used to secure a necessary distance between the swinging fulcrum of the sensing float and the sensing point, and without reducing the sensing accuracy of the sensing float, It becomes possible to shorten the distance between planting machines. Moreover, since the sensing float swings at the front fulcrum and the swinging fulcrum is located above, the sensing float can be smoothly swung by the surface resistance. As a result, not only can the mud push by the sensing float be suppressed. , The sensing float can easily get over the clod of the farm scene.
Further, the front end position of the ground contact area, which is the sensing point of the sensing float, is arranged in the vicinity of the seedling planting position. In this way, since the sensing point is close to the seedling planting position, even if the traveling aircraft tilts back and forth, it becomes difficult for the height to differ between the sensing point and the seedling planting position. A mechanism for correcting the difference becomes unnecessary.

  Next, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a traveling machine body of a riding type rice transplanter (transplanter), and a planting work machine 3 is connected to a rear portion of the traveling machine body 1 through a lifting link mechanism 2 so as to be lifted and lowered. . A planting work machine lifting / lowering hydraulic cylinder (not shown) is interposed between the traveling machine body 1 and the lifting / lowering link mechanism 2, and the planting work machine 3 is operated according to the hydraulic expansion / contraction operation of the hydraulic cylinder. It is to be lifted and lowered.

  The planting work machine 3 includes a work machine frame 4 connected to the rear end portion of the lift link mechanism 2, a seedling platform 5 provided in an inclined posture above the work machine frame 4, and a plurality of plantings extending rearward from the work machine frame 4. Attached transmission case 6, planting mechanism 7 provided at the rear end of each planting transmission case 6, sensing float (center float) 8 provided at the lower left and right central positions of the planting work machine 3 so as to be swingable up and down, A side float (not shown) is provided at the lower left and right side positions of the attached work machine 3 so as to be swingable up and down, and the like. The horizontal feed operation 5 and the seedling planting operation of the planting mechanism 7 are performed.

  In the field where seedlings are planted, the scraping work is performed in advance, and the planting mechanism 7 plants seedlings on the flattened surface, but the planting work machine 3 is planted behind the traveling machine body 1. In relation to the work, planting accuracy may be reduced due to rough rice fields caused by wheel marks. In particular, the headland where the airframe is turned is a place where the roughness of the surface due to the wheel marks is remarkable, and the planting accuracy tends to decrease. Therefore, in order to deal with such a problem, a leveling device 9 is provided at the front portion of the planting work machine 3. This leveling device 9 improves the roughing of the paddy surface due to the wheel marks by performing leveling work in front of the planting work machine 3, so that the planting accuracy can be improved, especially in the headland. It is remarkable.

  The leveling device 9 of the present embodiment includes a rotor frame 10 provided at the front end portion of the planting work machine 3 so that the vertical position can be adjusted, a rotor shaft 11 provided at a lower end portion of the rotor frame 10 so as to be rotatable, and the rotor shaft 11. A ground leveling rotor 12 provided integrally with the leveling rotor 12, a rotor cover 13 covering the top of the leveling rotor 12, and the like. The traveling power extracted from the rear axle case 14 of the traveling machine body 1 or the planting work machine 3 The ground leveling rotor 12 is rotated in a predetermined direction by the taken planting power, thereby leveling the farm field.

  Next, automatic elevation control of the planting work machine 3 will be described with reference to FIGS. 1 and 2. In the riding type rice transplanter, normally, the planting work machine 3 is automatically controlled to move up and down in accordance with the posture change of the sensing float 8, thereby suppressing the variation in planting depth. In other words, the sensing float 8 swings up and down according to the vertical position fluctuation of the planting work machine 3 with respect to the rice field, so that the vertical displacement amount of the sensing float 8 is determined via the sensing link mechanism 15. By inputting to the control valve 16, it is possible to automatically raise and lower the planting work machine 3 and keep the height of the planting work machine 3 with respect to the field surface substantially constant.

  The sensing float 8 has a warped shape whose front end is curved upward, and swings up and down by receiving a surface resistance with the front end position of the ground contact region as a sensing point P. In order to perform accurate surface detection with such a sensing float 8, a certain distance is required between the swinging fulcrum S and the sensing point P of the sensing float 8 in order to suppress the flutter of the sensing float 8. is there. If it is going to satisfy this distance with the conventional riding type rice transplanter as shown in FIG.3 and FIG.4, since it is necessary to extend the sensing float 101 ahead, between the traveling body 102 and the planting work machine 103, it is necessary. There existed a problem that the distance and the distance between the leveling apparatus 104 and the planting work machine 103 became long.

  In the riding type rice transplanter according to the present invention, in order to solve the above-described problem, the sensing float 8 is supported by the front fulcrum so as to be swingable up and down, and the swinging fulcrum S of the sensing float 8 is supported by the leveling device 9. Arranged above. In this way, a necessary distance can be secured between the swing fulcrum S and the sensing point P of the sensing float 8 using the space above the leveling device 9, so that the sensing accuracy of the sensing float 8 is lowered. In addition, the distance between the traveling machine body 1 and the planting work machine 3 can be shortened. In addition, since the sensing float 8 swings at the front fulcrum and the swinging fulcrum S is located above, the sensing float 8 can be smoothly swung by the surface resistance. As a result, mud pushing by the sensing float 8 can be prevented. Not only can it be suppressed, but the sensing float 8 can easily get over the soil mass in the field.

  3 and 4, when the distance between the swing fulcrum S of the sensing float 101 and the sensing point P is increased, the sensing point P moves from the seedling planting position N. When the traveling machine body 102 is tilted back and forth, the height is different between the sensing point P and the seedling planting position N, and a separate mechanism for correcting the difference is necessary. there were.

  On the other hand, in the riding type rice transplanter according to the present invention, when the distance between the swing fulcrum S of the sensing float 8 and the sensing point P is increased, the sensing point P becomes closer to the seedling planting position N. The sensing point P can be arranged in the vicinity of the seedling planting position N without sacrificing the sensing accuracy of the sensing float 8. Thereby, even if the traveling machine body 1 is tilted back and forth, a difference in height between the sensing point P and the seedling planting position N is unlikely to occur, so a mechanism for correcting the difference in height becomes unnecessary.

  The sensing link mechanism 15 of this embodiment includes a first rod 17, a first swing arm 18, a second rod 19, a second swing arm 20, and a third rod 21. The first rod 17 is provided between the front end of the sensing float 8 and one end of the first swing arm 18, and the second rod 19 is connected to the other end of the first swing arm 18 and the second swing. The third rod 21 is provided between one end of the arm 20 and the other end of the second swing arm and the control valve 16.

  Further, the swing fulcrum 18a of the first swing arm 18 is adapted to vary according to the planting depth adjustment (adjustment of the swing fulcrum height of the sensing float 8). In other words, when the swing fulcrum height of the sensing float 8 is changed based on the operation of the planting depth adjusting arm 22, the swing fulcrum 18 a of the first swing arm 18 is changed via the rod 23 and the arm 24, thereby sensing. The operating range of the link mechanism 15 (control valve 16) is shifted.

  According to the present embodiment configured as described, the attitude of the sensing float 8 provided so that the planting work machine 3 connected to the rear part of the traveling machine body 1 can swing up and down at the lower part of the planting work machine 3. In a riding type rice transplanter that automatically moves up and down according to changes and includes a leveling device 9 between the traveling machine body 1 and the planting work machine 3, the sensing float 8 is supported at the front fulcrum so that it can swing up and down. At the same time, since the swing fulcrum S of the sensing float 8 is disposed above the leveling device 9, it is necessary between the swinging fulcrum S of the sensing float 8 and the sensing point P using the space above the leveling device 9. A distance can be secured. As a result, the distance between the traveling machine body 1 and the planting work machine 3 can be shortened without reducing the sensing accuracy of the sensing float 8.

  In addition, since the sensing float 8 swings at the front fulcrum and the swinging fulcrum S is located above, the rocking due to the surface resistance becomes smooth, and as a result, mud push by the sensing float 8 can only be suppressed. In addition, the sensing float 8 can easily get over the clod of the farm scene.

  In addition, since the front end position of the ground contact area that is the sensing point P of the sensing float 8 is arranged in the vicinity of the seedling planting position N, even if the traveling machine body 1 is tilted back and forth, the sensing point P and the seedling planting position N A difference in height does not easily occur, and as a result, a mechanism for correcting the difference in height becomes unnecessary.

It is a rear side view of a riding type rice transplanter according to the present invention. It is a principal part side view of the riding type rice transplanter which concerns on this invention. It is a rear side view of a riding type rice transplanter according to a conventional example. It is a principal part side view of the riding type rice transplanter concerning a prior art example.

Explanation of symbols

1 traveling machine body 3 planting work machine 8 sensing float 9 leveling device 15 sensing link mechanism 16 control valve N seedling planting position P sensing point S swinging fulcrum

Claims (2)

The planting work machine connected to the rear part of the traveling machine body is automatically raised and lowered according to the change in posture of the sensing float provided at the lower part of the planting work machine so as to be swingable up and down, and In the transplanter equipped with a leveling device between the working machine,
A transplanter, wherein the sensing float is supported by a front fulcrum so as to be swingable up and down, and the swinging fulcrum of the sensing float is disposed above the leveling device.   2. The transplanter according to claim 1, wherein a front end position of a ground contact area, which is a sensing point of the sensing float, is arranged in the vicinity of a seedling planting position.

Images