JP4240792B2 - Seedling transplanter - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seedling transplantation machine.
[0002]
[Prior art]
The conventional riding rice transplanter connects 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 the planting surface is leveled with a float located in front of the seedling planting device of the seedling planting part. A seedling planting device is used to plant seedlings.
[0003]
[Problems to be solved by the invention]
In the conventional device, seedlings are planted by the seedling planting device on the planting surface that has been leveled with the float, so in the seedling planting work of the headland swirling the traveling vehicle body, there is much mud movement by the wheels and many irregularities 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.
[0004]
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. Raising without interfering was a more difficult problem. Thus, the present invention is intended to solve such problems.
[0005]
[Means for solving problems]
In order to solve such a technical problem, the invention described in claim 1 ascends and descends the seedling planting part 4 equipped with the float 27 and the seedling planting device 25 via the lifting link mechanism 3 at the rear part of the traveling vehicle body 2. The ground leveling device 28 supported by the seedling planting part 4 is provided on the rear side of the traveling vehicle body 2 on the front side of the seedling planting part 4, and the seedling planting part 4 is not connected by the lifting link mechanism 3. when raised to planting position, wherein the ground leveling device 28 has a structure which does not interfere with the movement of the relatively lowered by upper elevator link mechanism 3 to the seedling planting unit 4.
[0006]
[Action and effect of the invention]
In the present invention, in the state where NaeUe with section 4 descends the elevating link mechanism 3 is located at the working position A, it will planted seedlings by ground leveling and NaeUe with device 25 by the float 27 and leveling apparatus 28 .
[0007]
When the elevating link mechanism 3 is raised while the traveling vehicle body 2 turns on the shore, the leveling device 28 is lowered relative to the seedling planting portion 4 to prevent the elevating link mechanism 3 from moving upward. Not .
[0008]
As described above, the present invention can raise the seedling planting unit 4 to a high position while the ground leveling device 28 is provided on the front side of the seedling planting unit 4 on the rear side of the traveling vehicle body 2. The length of the leveling device 28 can be shortened, and the overall length of the riding rice transplanter can be reduced to improve the front / rear balance of the aircraft, and the running performance and work performance can be improved, and the seedling planting posture can be stabilized. Can be achieved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described.
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 part 4 mounted on the rear part of a riding traveling vehicle body 2 via a lifting link device 3 so as to be movable up and down, and is configured as a riding rice transplanter as a whole. Yes.
[0010]
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.
[0011]
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.
[0012]
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.
[0013]
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.
[0014]
The elevating / lowering link device 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.
[0015]
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.
[0016]
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, and left and right floats 27b and 27c.
[0017]
Next, the leveling device 28 of the seedling planting unit 4 will be described with reference to FIGS. 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.
[0018]
The center float 27a of the seedling planting part 4 is disposed in front of the left and right floats 27b and 27c, the center leveling plate 28a is disposed in front of the center float 27a, and the left and right rear wheels 6 are disposed. , 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.
[0019]
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.
[0020]
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.
[0021]
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.
[0022]
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.
[0023]
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).
[0024]
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.
[0025]
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 where the upper link 3a and the left and right lower links 3b, 3b are rotated downward, the float 27 and the leveling device 28 are grounded and moved forward while leveling the ground surface. Then, the mud generated by the left and right rear wheels 6 and 6 is leveled by the center leveling plate 28a and the left and right leveling plates 28b and 28c, and then the seedlings are planted by the seedling planting devices 25, 25,. To go.
[0026]
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.
[0027]
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.
[0028]
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.
[0029]
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 seedlings are planted to the highest position. Although the attachment portion 4 is lifted, 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 plates 28b and 28c may be forcibly lowered to avoid interference with the lower links 3b and 3b.
[0030]
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.
[0031]
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.
[0032]
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.
[Brief description of the drawings]
FIG. 1 is an overall side view of a mobile agricultural machine.
FIG. 2 is an overall plan view of a mobile agricultural machine.
FIG. 3 is a cut side view of a main part.
FIG. 4 is a plan view of a main part.
FIG. 5 is a side view of a main part.
FIG. 6 is a plan view, a rear view, and a side view of the main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seedling machine 2 Traveling vehicle body 3 Lifting link 3a Upper link 3b Lower link 4 Seedling planting part 14 PTO shaft 15 Work machine transmission shaft 20 Frame before link 21 Frame after link 22 Swing arm 23 Hydraulic lifting cylinder 24 Seedling stand 25 Seedling Planting device 26 Transmission frame 27a Center float 27b Left float 27c Right float 28 Leveling device 28a Center leveling plate 28b Left leveling plate 28c Right leveling plate 29 Left / right auxiliary wheel 30 Bracket 31 Pin 32 Support arm 33 Spring

Claims (1)

A seedling planting portion 4 equipped with a float 27 and a seedling planting device 25 is connected to the rear portion of the traveling vehicle body 2 via the lifting link mechanism 3 so as to be movable up and down, and the rear side of the traveling vehicle body 2 on the front side of the seedling planting portion 4. When the leveling device 28 supported by the seedling planting unit 4 is provided on the side, and the seedling planting unit 4 is raised to the non-planting position by the lifting link mechanism 3 , the leveling device 28 becomes the seedling planting unit. A seedling transplanting machine that is configured so as not to interfere with the upward movement of the elevating link mechanism 3 by lowering relative to 4.

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