JP2009045072A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problems, that the space on the front side of a float set on a seedling planting part and of the rear side of rear wheels of a running body is small in a conventional seedling transplanter, positioning of a land-grading device thereon is difficult, and a newly attached land-grading device is difficult to be elevated without causing interfering with the seedling planting part or elevating linking mechanism. <P>SOLUTION: There are provided a seedling transplanter which is formed by connecting a seedling planting part (4) having a float (27a) and a seedling planting device (25) to the rear part of a traveling body via an elevating link mechanism that has a land-grading device (28) supported by the seedling planting part (4) on the front side of the seedling planting part and on the rear side of the traveling body via a support arm (32), and setting a support arm (32) to be vertically turnable via a spring. By having the land-grading device (28) lowered relative to the seedling transplanting part (4), the upward movement of the elevation link mechanism cannot be obstructed by downward action of a predetermined weight, and having the support arm (32) turning and retreating downward, the seedling planting part (4) is elevated to a non-planting position by the elevating link mechanism. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  This invention belongs to the technical field of seedling transplanters.

Conventional riding rice transplanters connect the seedling planting part to the rear part of the traveling vehicle body via a lifting link mechanism so that the seedling planting part can be raised and lowered, and level the planting surface with a float located on the front side of the seedling planting device of the seedling planting part. A seedling planting apparatus is used to plant seedlings (see Patent Document 1).
JP 11-46529 A

  In the conventional device, seedlings are planted by the seedling planting device on the planting surface that has been leveled with a float. However, there was a problem that the leveling work was not enough with the float alone, and it was difficult to improve the seedling planting accuracy.

  In order to solve this problem and improve the leveling of the headland, it can be solved by attaching another leveling device outside the float. However, it is difficult to place a leveling device in front of the float of the seedling planting part and behind the rear wheel of the traveling vehicle body, and it is difficult to place a leveling device. It was difficult to raise without causing interference. Thus, the present invention is intended to solve such problems.

In order to solve the above problems, the following technical measures were taken.
That is, the seedling planting part (4) equipped with the float (27a, 27b, 27c) and the seedling planting device (25) is connected to the rear part of the traveling vehicle body (2) via the lifting link mechanism (3) so as to be movable up and down. The leveling device (28) supported by the seedling planting part (4) via the support arm (32) is provided on the front side of the seedling planting part (4) and on the rear side of the traveling vehicle body (2). (32) is provided so as to be pivotable up and down via a spring (33), and when the seedling planting part (4) is raised to the non-planting position by the lifting link mechanism (3), a predetermined load is applied from above. The support arm (32) is pivoted and retracted by acting, so that the leveling device (28) is lowered relative to the seedling planting part (4) and the lifting link mechanism (3) A seedling transplanting machine characterized in that it does not hinder upward movement.

  Therefore, in the state where the lifting link mechanism (3) is lowered and the seedling planting part (4) is located at the work position (A), the leveling is leveled by the floats (27a, 27b, 27c) and the leveling device (28). Seedlings are planted by the seedling planting device (25). When the traveling vehicle body 2 turns on the shore, if the elevating link mechanism (3) is raised, a predetermined load is applied from above, and the support arm (32) is rotated downward and retracted, and the leveling device ( 28) descends relative to the seedling planting part (4) and does not prevent the upward / downward link mechanism (3) from moving upward.

  Therefore, the seedling planting unit 4 can be raised to a high position while the ground leveling device 28 is provided on the front side of the seedling planting unit 4 and on the rear side of the traveling vehicle body 2. Can reduce the overall length of the riding rice transplanter and improve the front / rear balance of the aircraft, improve the running performance and work performance, and stabilize the seedling planting posture .

An embodiment of the present invention will be described with reference to the drawings.
Based on FIGS. 1-2, the whole structure of the seedling transplanter 1 is demonstrated first. This seedling transplanter 1 has a six-planted seedling planting section 4 mounted on the rear part of a riding traveling vehicle body 2 via a lifting link mechanism 3 so as to be movable up and down, and is configured as a riding rice transplanter as a whole. Yes.

  The traveling vehicle body 2 includes left and right front wheels 5 and 5 and left and right rear wheels 6 and 6. Front wheel final cases 8, 8 are provided on the left and right sides of the transmission case 7 arranged at the front of the aircraft, and the left and right front wheels 5, 5 are projected on the front wheel shaft protruding laterally from the lower portion of the front wheel final cases 8, 8. 5 is attached. Further, the front end of the main frame 9 is fixed to the rear portion of the transmission case 7, and the rear wheel gear cases 10 and 10 can be freely rolled around the center of the rear end of the main frame 9 with the horizontal rear wheel rolling shaft as a fulcrum. The left and right rear wheels 6 and 6 are attached to a rear axle that supports and projects laterally from the rear wheel gear cases 10 and 10.

  The engine 11 is mounted on the main frame 9, the rotational power is taken out to the engine output shaft protruding from the left side surface of the engine 11, and this rotational power is driven by a hydraulic pump (not shown) via the first belt transmission device 12. The power is transmitted to the shaft, and further transmitted to the transmission case 7 via the second belt transmission 13 capable of continuously variable transmission.

  The rotational power transmitted to the transmission case 7 is shifted by a main transmission (not shown) in the case, branched into driving power and work equipment power, and taken out to the left via the front wheel final cases 8 and 8. The power is transmitted to the right front wheels 5 and 5 and is also transmitted to the left and right rear wheels 6 and 6 via the rear wheel gear cases 10 and 10. Further, the working machine power is transmitted from the PTO shaft 14 to the seedling planting unit 4 via the bending work machine transmission shaft 15 to drive the operating unit.

  An upper portion of the engine 11 is covered with an engine cover 16, and a cockpit 17 is provided on the engine cover 16. A steering wheel 18 for steering the left and right front wheels 5 and 5 is provided in front of the cockpit 17, and a spare seedling table 19 on which the replenishing seedlings are placed on both the front left and right sides of the traveling vehicle body 2.

  The elevating link mechanism 3 has a parallel link configuration, and includes an upper link 3a and a pair of left and right lower links 3b and 3b. The base side of these links 3a, 3b, 3b is pivotally supported on a link front frame 20 erected on the rear end of the main frame 9, and the link rear frame 21 is attached to the front ends of the links 3a, 3b, 3b. Are connected. And the seedling planting part 4 is attached to the post-link frame 21 so as to be freely rollable.

  A hydraulic elevating cylinder 23 is interposed between the support member fixed to the main frame 9 and the tip of the swing arm 22 formed integrally with the upper link 3a. The hydraulic elevating cylinder 23 is expanded and contracted by hydraulic pressure, so that the upper link 3a is The seedling planting part 4 connected to the post-link frame 21 is moved up and down in a substantially constant posture. The hydraulic lift cylinder 23 is extended and contracted by a hydraulic lift valve (not shown) provided in the traveling vehicle body 2.

  The seedling planting unit 4 is, for example, six-row planting, a seedling mounting base 24 that supplies seedlings one by one to a predetermined seedling outlet, and six sets of seedlings for planting seedlings supplied to the seedling outlet in the field .., The seedling mounting table 24 and the seedling planting devices 25, 25,... And a transmission frame 26 that transmits power to them, and the field surface is leveled prior to seedling planting. A central float 27a, a left float 27b, and a right float 27c.

  Next, the leveling device 28 of the seedling planting unit 4 will be described with reference to FIGS. 3 and 4. The leveling device 28 includes a central leveling plate 28a and left and right leveling plates 28b and 28c that are detachably attached to the left and right sides of the central leveling plate 28a. The center leveling plate 28a and the left / right leveling plates 28b, 28c are arranged on the front side of the seedling planting part 4 and on the rear side of the traveling vehicle body 2, and are attached to the seedling planting part 4 side. Yes.

  The center float 27a of the seedling planting part 4 is disposed in front of the left float 27b and the right float 27c, the center leveling plate 28a is disposed closer to the front of the center float 27a, and the left and right rear wheels 6 , 6 and is arranged so as to be located below the rear part of the lower links 3b, 3b. The left and right leveling plates 28b and 28c attached to the central float 27a are arranged in a rearward inclination so that the free end sides on the left and right outer sides are sequentially positioned rearward, and the left and right rear wheels 6, 6 is arranged inside.

  When the left and right rear wheels 6 and 6 and the left and right auxiliary wheels 29 and 29 are mounted on the traveling vehicle body 2, the left and right auxiliary wheels 29 and 29 are attached to the mounting positions of the left and right leveling plates 28b and 28c. 29 is located. Therefore, when the left and right auxiliary wheels 29 and 29 are mounted, the left and right leveling plates 28b and 28c are removed, and only the center leveling plate 28a is attached to perform seedling planting work.

  The rear ends of a pair of left and right support arms 32, 32 are pivotally supported via pins 31, 31 on left and right brackets 30 attached to the transmission frame 26 of the seedling planting unit 4, and the support arm 32 is supported. , 32 is attached with a central leveling plate 28a of the leveling device 28. A spring 33, 33 is interposed between the bracket 30 and the support arm 32, 32, and the support arm 32, 32 is supported in a state where the load is not applied in the up-down direction in a normal state, and the support arm is supported. When a predetermined load acts on 32 and 32 from above, it is configured to retract and rotate downward.

  L-shaped switching arms 34, 34 are pivotally supported on the transmission frame 26 by pins 31, and one end portions of the switching arms 34, 34 are brought into contact with the rear end portions of the springs 33, 33, and the leveling depth switching lever 35 and The switching arms 34, 34 can be switched between a lower leveling position and an upper non-leveling position via switching wires 36, 36.

  Thus, when the leveling depth switching lever 35 is operated and the switching arms 34 and 34 are rotated clockwise, the rear ends of the springs 33 and 33 are rotated downward by the switching arms 34 and 34, and the support arms 32 and 34 are rotated. The front end of 32 is rotated upward, and the center leveling plate 28a and the left / right leveling plates 28b, 28c move to the upper non-leveling position. Further, when the leveling depth switching lever 35 is operated and the switching arms 34, 34 are rotated counterclockwise, the central leveling plate 28a and the left / right leveling plates 28b, 28c move to the lower leveling position. When the switching arms 34, 34 are locked by the fixing means 37, the central leveling plate 28a and the left / right leveling plates 28b, 28c are fixed at the leveling position or the non-leveling position.

  Therefore, at the time of normal seedling planting, the center leveling board 28a and the left / right leveling boards 28b, 28c are switched to the upper non-leveling position, and the center leveling board 28a and the left / right leveling board 28b at the time of headland seedling planting. , 28c is switched to the lower leveling position, the headland with rough ground surface is leveled and the seedling planting work can be performed satisfactorily. The central leveling plate 28a and the left / right leveling plates 28b, 28c may be switched to a leveling position or a non-leveling position in conjunction with a planting depth adjustment lever (not shown).

  Further, in this embodiment, as shown in FIG. 5, the support pin 39 on the side of the center leveling plate 28 a is fitted and held in the vertical cylindrical portion 38 at the front end portion of the support arms 32, 32, and the lock device 40 is used. For example, it is configured so that it can be fixed by adjusting it up and down in five stages. Accordingly, the leveling angles of the central leveling plate 28a and the left and right leveling plates 28b, 28c can be adjusted up and down with respect to the central float 27a, and stable leveling work can be performed.

Next, the rising movement state of the leveling device 28 when the seedling planting unit 4 is raised will be described.
As shown by the solid line in FIG. 3, at the working position A in which the upper link 3a and the left and right lower links 3b, 3b are rotated downward, the center float 27a, the left float 27b, the right float 27c, and the leveling device are floats. 28 is grounded and moves forward while leveling the ground, and the mud generated by the left and right rear wheels 6 and 6 is leveled by the center leveling board 28a, the left and right leveling boards 28b and 28c, and then the seedling A seedling is planted by the planting devices 25, 25,.

  If the upper link 3a and the lower links 3b, 3b are raised to the intermediate position B when the traveling vehicle body 2 turns on the shore, the seedling planting section 4 is in a state where the power transmission to the seedling planting section 4 is interrupted. Rises to an intermediate position B. Then, the end portion of the central leveling plate 28a that has risen from below contacts the lower surface of the lower links 3b and 3b that have risen to the intermediate position B.

  From this intermediate position B, the upper link 3a and the lower links 3b, 3b are further raised and moved to the highest rise position C. If the seedling planting part 4 continues to rise during this time, the lower link 3b, 3b presses the end of the center leveling plate 28a downward, and supports the springs 33, 33 attached to the support arms 32, 32 while compressing them. The arms 32 and 32 are retracted and rotated downward, and only the seedling planting unit 4 continues to rise and moves to the highest rise position C.

  The seedling planting unit 4 can be raised to a high position while being a riding rice transplanter provided with the central leveling plate 28a and the left and right leveling plates 28b, 28c, and the upper link 3a and the lower link 3b, By shortening the length of 3b, the overall length of the riding rice transplanter can be reduced, and the front / rear balance of the aircraft can be improved. As a result, the running performance is improved, the work performance is improved, and the seedling planting posture is stabilized. Can be achieved.

  In this embodiment, as described above, the center leveling board 28a and the left / right leveling boards 28b and 28c are moved relatively downward with respect to the seedling planting part 4 that moves upward, and the seedlings are planted to the highest position. Although the attachment portion 4 is raised, the support arms 32 and 32 are rotated downward by an actuator such as a hydraulic cylinder in association with the upward movement of the upper link 3a and the lower links 3b and 3b, and the central leveling plate 28a. The left and right leveling boards 28b and 28c may be forcibly lowered to avoid interference with the lower links 3b and 3b.

  As shown in FIG. 6, if the concave portion 41 is configured in a portion where the central leveling plate 28 a comes into contact with the work machine transmission shaft 15 when the central leveling plate 28 a is raised, the work machine transmission shaft 15 is placed in the concave portion 41 when the central leveling plate 28 a is raised. And the seedling planting part 4 can be moved to the raised position without causing the center leveling plate 28a to interfere with the work machine transmission shaft 15.

  In this embodiment, the central float 27a is also used as a sensor float, the distance from the ground surface of the seedling planting part 4 is detected, and the seedling planting part 4 is controlled to move up and down. A central leveling plate 28a is arranged in front of the left and right leveling plates 28b and 28c attached to the central leveling plate 28a so that the left and right sides of the central leveling plate 28a are inclined rearward at the left and right sides in plan view. It is made to approach both sides and the front part of the central float 27a is enclosed by the center leveling board 28a and the left and right leveling boards 28b and 28c.

  Accordingly, it is possible to level the small unevenness by the central leveling plate 28a and improve the sensing accuracy as the sensor float, and the mud raised by the left and right rear wheels 6 and 6 is left to the left and right leveling plates 28b, By 28c, it can guide to an outer wheel trace and can level-and-clean cleanly, and can improve seedling planting accuracy.

It is a whole side view of a mobile agricultural machine. It is a whole top view of a mobile agricultural machine. It is a cutaway side view of the principal part. It is a top view of the principal part. It is a side view of the principal part. It is the top view of a principal part, a rear view, and a side view.

Explanation of symbols

  1: seedling transplanter, 2: traveling vehicle body, 3: lifting link mechanism, 4: seedling planting unit, 25: seedling planting device, 27a: center float, 27b: left float, 27c: right float, 28: leveling device 32: Support arm, 33: Spring

Claims (1)

  A rear seedling planting part (4) equipped with a float (27a, 27b, 27c) and a seedling planting device (25) is connected to the rear part of the traveling vehicle body (2) via a lifting link mechanism (3) so as to be movable up and down. A ground leveling device (28) supported by a seedling planting part (4) through a support arm (32) is provided on the front side of the seedling planting part (4) and on the rear side of the traveling vehicle body (2). ) Is provided so as to be pivotable up and down via a spring (33), and when the seedling planting part (4) is raised to the non-planting position by the lifting link mechanism (3), a predetermined load acts from above. As the support arm (32) is pivoted downward and retracted, the leveling device (28) is lowered relative to the seedling planting part (4) and moved upwardly of the lift link mechanism (3). A seedling transplanting machine characterized in that the movement of the seedling is not hindered.

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