JP2000312517A - Planting part of rice transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a planting part of a rice transplanter having solved such a problem that a conventional planting part in a multi-low planting type rice transplanter has, in the case of severe unevenness of furrow pan, an inconvenience that floating seedlings readily occur when seedlings are planted at both right and left end parts of a machine body. SOLUTION: In this planting part 4 of a rice transplanter in which plural arms 87 are fixed to a planting depth adjustment shaft 38 horizontally supported rotatably in the right and left direction, the rear parts of plural floats 34.35.35' are pivoted on the arm 87, support heights of rear parts of floats 34.35.35' are changed by the rotation of the planting height adjustment shaft 38 and the planting heights are changed, the planting depth adjustment shaft 38 is obtained by connecting plural shaft members 38L.38C.38R in a straight line state. The shaft members 38L.38C.38R can be connected to other shaft members by shifting phases.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for a planting portion of a multi-row rice transplanter. In detail, even if the tillage is severely uneven, a technique for planting seedlings at the right and left ends of the machine at appropriate depths to prevent floating seedlings and rolling seedlings, and support for a planting depth adjustment shaft The present invention relates to a technique for simplifying a configuration.

[0002]

2. Description of the Related Art The planting section of a conventional multi-row rice transplanter has a plurality of floats suspended therefrom, and the planting section is leveled while floating on a field to facilitate the planting operation. I have. The float is pivotally supported at the rear so that the front can swing up and down, and the pivot is connected to an arm provided on a planting depth adjusting shaft horizontally and horizontally supported left and right. .

The planting depth adjusting shaft is rotatably supported by a planting center case or a chain case via a supporting member or the like, and is provided with a planting depth adjusting lever protruding forward and upward. By rotating the shaft, the rear height of the float is changed, and the interval between the float and the chain case supporting the planting claws is changed so that the planting depth is changed. Furthermore, a rolling control device is arranged in the planting section, and the inclination sensor detects the inclination of the planting section left and right due to unevenness of the tillage, and drives the horizontal control actuator accordingly to correct the inclination. A configuration for controlling the planting portion to be horizontal is also known.

[0004]

However, in the conventional planting section having such a configuration, the rolling control device detects the inclination of the planting section, and then drives the horizontal control actuator to remove the planting section. Since it took some time to return to horizontal, when the tillage was severely uneven or during high-speed running work, the rolling control device could not respond to the unevenness, and the planting part tilted slightly to the left and right Was sometimes done. In this case, there is a problem that the planting depth is largely shifted particularly on the left and right ends of the machine body, so that floating seedlings and rolling seedlings are easily generated. In addition, in the case of multiple-row planting, since the planting depth adjustment axis becomes long in the left-right direction, errors due to bending, welding strain, and the like become large, and the planting depth due to the planting portion greatly varies for each bar. There was a defect. In addition, since the planting center case is configured to support the central part of the planting depth adjusting shaft, it was necessary to attach a screw boss for attaching a support member to the planting center case, but this is often difficult in structure. Was. Further, when the supporting member is fastened together with the case mating surface of the planting center case, the lubricating oil in the center case may leak from there.

[0005]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. In the first aspect, the base ends of the plurality of arms are fixedly mounted on the planting depth adjusting shaft which is supported horizontally so as to be rotatable in the left-right horizontal direction, and the rear ends of the plurality of floats are pivoted at the ends of the arms. In the planting section of the rice transplanter that changes the planting depth by changing the height of the rear fulcrum of the float by rotating the planting depth adjusting shaft, the planting depth adjusting shaft has a plurality of Are connected in a straight line.

According to a second aspect of the present invention, in the planting portion of the rice transplanter according to the first aspect, the shaft member forming the planting depth adjusting shaft is connected to another adjacent shaft member with a phase shift. It was made possible.

According to a third aspect of the present invention, a chain case is attached from a planting center case via a connecting pipe, and a plurality of arms are mounted on a planting depth adjusting shaft which is horizontally supported so as to be rotatable in the left-right horizontal direction. At the planting portion of the rice transplanter having a fixed end and a plurality of floats at the ends of the arms pivotally supported, the connecting pipe supported the planting depth adjusting shaft via a support member. Things.

[0008]

Next, an embodiment of the present invention will be described. FIG. 1 is a side view showing the overall configuration of a rice transplanter having a planting section according to one embodiment of the present invention. FIG. 2 is a plan view showing a configuration in which the rear part of the float is suspended in the main planting section, FIG. 3 is a side view showing a configuration near the center float, and FIG. 4 is a configuration showing a configuration near the second side float. It is a side view.

First, an overall configuration of a riding rice transplanter according to an embodiment of the present invention will be described with reference to FIGS. That is, in the riding rice transplanter A, the planting portion 4 is disposed at the rear portion of the traveling portion 1 via the elevating link mechanism 27, and the traveling portion 1 has the engine 2 mounted above the front portion of the body frame 3 and mounted at the lower front portion. The front wheel 6 is supported via a front axle case, and the rear wheel 8 is supported via a rear axle case 7 at the rear. The engine 2 is covered with a bonnet 9, spare seedling stands 10 and 10 are disposed on both sides of the bonnet 9, and a steering handle 14 is disposed on a dashboard 5 at a rear portion of the bonnet 9. The vehicle body cover 12 covers both sides and the rear of the vehicle body frame 3, and the seat 13 is disposed at a position rearward of the steering handle 14.
Sides of the seat 13 and the front of the seat 13, and both sides of the seat 13 and the seat 1
3 steps backwards.

On the side of the driver's seat 13, a traveling speed change lever 30, an auxiliary speed change lever 31 for planting up / down and work traveling speed, and a planting sensitivity adjusting lever are arranged. A clutch pedal 32 and left and right brake pedals are arranged, and an eight-row fertilizer 33 is arranged behind the seat 13.

The planting section 4 includes a seedling table 16, a planting claw 17, a center float 34, and a plurality of side floats 3.
The seedling table 16 is disposed at a front height and a low level. The lower part of the seedling table 16 is reciprocated right and left by a lower guide rail 18 and an upper part of the front is an upper guide rail 19. The lower guide rail 18 and the upper guide rail 19 are slidably supported by a planting center case 20 via a frame or the like. Then, connecting pipes 95 are protruded from the planting center case 20 to the left and right, and chain cases 21 are fixed to the ends thereof,
Further, connecting pipes are protrudingly provided on the left and right outer sides, and chain cases 21 are fixed to the ends thereof, so that a total of four chain cases 21 are arranged side by side. The four chain cases 21, 21... Extend rearward in parallel, and at the rear ends thereof, rotary cases 22 for rotating in one direction are arranged, and a pair of plants is provided on both sides of each of the eight rotary cases 22. The attachment claws 17 are arranged to form an eight-row planting portion 4.

In the above configuration, the planting center case 2
To 0, the power of the PTO shaft provided at the rear part of the traveling unit 1 is input via a universal joint 50 or the like, and the rotary case 22 is driven via the chain case 21.
The planting claws 17 are driven. In this way, the seedling mounting table 16 is reciprocally slid left and right along with the forward traveling, and the planting claws 17 are driven in synchronization with the reciprocation to cut out the seedlings for one plant.
The planting work is performed continuously.

A front portion of the planting center case 20 is connected to the lifting link mechanism 27 via a rolling fulcrum shaft, and the lifting link mechanism 27 includes a top link 25, a lower link 26, and the like. The planting section 4 can be moved up and down by an elevating cylinder 28 arranged below.

The seedling mounting table 16 is divided into two seedling mounting tables on the right outside in the traveling direction to form a divided seedling mounting table 16D, and a fixed six-row seedling mounting table at the center of the machine is used as a main seedling mounting table. 16M, the split seedling mounting table 16D is configured to be detachable, the split seedling mounting table 16D is detached, and is mounted on the seedling mounting surface side of the main seedling mounting table 16M so as to be stowable. are doing.

Here, the configuration of the planting section 4 will be described in detail. That is, as shown in FIG. 2, the planting portion 4 has a center float 34 at the lower center and first side floats 35, 35 and a second side float 3 on both left and right sides.
5 ′ and 35 ′ are provided, and each of the floats 34.3
The pitching fulcrum shafts 85, 85... For supporting the front portions of the 5.35 ′ so as to be able to swing up and down are provided on the brackets 86, 86.
.. (FIG. 4), the base ends of the planting depth adjusting arms 87 are fixedly mounted on the planting depth adjusting shaft 38 that is supported horizontally so as to be rotatable in the left-right direction, and the distal end of the arm 87. Are connected to the pitching fulcrum shaft 85.

A base end of a planting depth adjusting lever 98 for changing a standard planting depth is fixed to the planting depth adjusting shaft 38, and the lever 98 is moved along a guide (not shown). By rotating, the planting depth adjusting arms 87
Is pivoted up and down so that the rear pivot point of each of the floats 34, 35 and 35 'is moved up and down to adjust the planting depth. An elevation control device 99 is provided above the front part of the center float 34, detects the inclination angle of the center float 34, and automatically expands and contracts the elevation cylinder 28 in accordance with the detected value, so that the planting portion is moved. It is raised and lowered so that the planting depth is constant even if the tillage has irregularities. Further, a rolling control device (not shown) is provided near the connecting position between the traveling unit 1 and the planting unit 4, and the traveling unit is controlled by an inclination sensor, each speed sensor, and the like provided in the traveling unit 1 and the planting unit 4. 1 and the horizontal control actuator, such as an electric motor, is driven to tilt the planting section 4 with respect to the traveling section 1 around the rolling fulcrum axis. Therefore, it is configured to correct the left-right inclination of the planting portion 4 and to make the planting depth of the left and right strips constant.

Next, the configuration of the planting depth adjusting shaft 38, which is a main part of the present invention, will be described. FIG. 5 is a perspective view showing a configuration of a planting depth adjusting shaft, and FIG. 6 is an exploded perspective view showing a configuration for connecting a shaft member (pipe) constituting the planting depth adjusting shaft. 7 is an enlarged perspective view showing a state where the shaft member (pipe) is connected and fixed from the state shown in FIG. 6, and FIG. 8 is an enlarged view showing a state where the pipes on the left and right sides are connected and fixed out of phase with the center side pipe. It is a perspective view. FIG. 9 is a perspective view showing the relationship between the height of the rotation fulcrum at the rear of the float when the left and right pipes are connected and fixed with the phase shifted from the center pipe.

That is, as is apparent from FIGS. 2 and 5, the planting depth adjusting shaft 38 includes a plurality of shaft members (in this embodiment, a left pipe 38L, a center pipe 38C, and a right pipe 38R). Book pipe). As shown in FIG. 6, fitting projections 91 are provided at both ends of the center pipe 38C, and the fitting projections 91 are inserted into the left and right pipes 38L and 38R to form a three-piece pipe 38L.
・ 38C ・ 38R are connected in a straight line. Also, as shown in FIG. 5, the right end of the left pipe 38L,
Flange-shaped connecting members 88 are fixedly provided at both ends of the center pipe 38C and at the left end of the right pipe 38R. The connecting member 88 has a substantially square shape, and arcuate long holes 89 centering on the axis of the pipe are formed at four corners thereof (FIG. 6). A bolt 90 is inserted through the bolt and fixed by bolting (FIG. 7).

Since the above structure is adopted, by changing the position where the bolt 90 is inserted into the above-described arc-shaped long hole 89, the pipes 38L and 38R on both the left and right sides are connected to the central pipe 3L.
8C can be connected to be out of phase. FIG. 8 shows the connection when the phase is shifted by a.
Is shown in Therefore, the left and right pipes 38L and 38R
By appropriately setting the phase difference with respect to the center pipe 38C, the right and left planting depth adjusting arms 8 as shown in FIG.
7 can be made higher than that on the center,
Since the height h2 of the rear pivot point of the side floats 35 and 35 'can be higher than the height h1 of the rear pivot point of the center float 34 (h2> h1), the floats of the planting claws 17 located on both the left and right sides can be used. By setting the projecting length of 35.35 'downward to be longer than the projecting length of the center side planting claw 17 below the float 34, the planting depth at both left and right sides can be made relatively deep. With this, even when the unevenness of the cultivator is severe and the above-mentioned rolling control cannot respond to the unevenness of the cultivator, the strips on both left and right sides are adjusted in advance to the deep planting side, so that floating seedlings and rolling seedlings are The occurrence is suppressed.

Contrary to the above, the height of the tip of the planting depth adjusting arm 87 on the left and right sides may be adjusted to be lower than that on the center side. In addition, when planting work is performed on a flat cultivator, there is no problem that the left and right ends of the strip become floating seedlings. In this case, three pipes 38L, 38C,
38R may be adjusted so that the phases match. The operation of adjusting the phases of the three pipes 38L, 38C, 38R can be performed when the rice transplanter is shipped, or can be sequentially performed before the planting operation according to the condition of the cultivator.

In this embodiment, the connecting members 88, 88,.
Although the configuration is such that an arc-shaped long hole is provided, the invention is not limited to the configuration having an arc-shaped long hole. For example, a hole having a diameter larger than the diameter of the bolt 90 is formed, and the bolt 90 is inserted and fixed there. You may comprise so that it can be performed. That is, the left and right pipes 3
8L / 38R may be attached to the center pipe 38C so that the phase difference can be changed.
However, the present invention is not limited to the above-described configuration having an arc-shaped long hole.

Next, the support structure of the planting depth adjusting shaft 38, which is another essential part of the present invention, will be described. FIG.
FIG. 4 is a partial cross-sectional side view showing a state where the planting depth adjusting shaft is supported by a connecting pipe.

That is, as in the prior art, the planting center case 2
Instead of supporting the planting depth adjusting shaft 38 by a supporting member fixed to 0, as shown in FIG. 10, a supporting member 96 is connected to a connecting pipe 95 connecting the planting center case 20 and the chain case 21. The planting depth adjusting shaft 38 is supported by the supporting member 96. In this embodiment, a substantially “U” -shaped support member 96 is provided below the flat plate member 97 that is integrally fixed to the connection pipe 95.

With this configuration, it is not necessary to provide a screw boss or the like for attaching a support member to the planting center case 20, and the structure of the planting center case 20 can be simplified.

[0025]

The present invention is configured as described above.
The following effects are obtained. That is, as shown in claim 1, the base ends of a plurality of arms are fixedly mounted on a planting depth adjusting shaft which is horizontally supported so as to be rotatable in the left-right horizontal direction, and a plurality of floats are provided at the ends of the arms. The planting part of a rice transplanter that pivots at the rear and changes the height of the rear fulcrum of the float by rotating the planting depth adjusting shaft to change the planting depth, wherein the planting depth adjusting shaft is Since a plurality of shaft members are connected in a straight line, long parts are not required, bending and distortion can be reduced, and the precision of the parts can be improved. Such costs can be reduced.

According to a second aspect of the present invention, in the planting section of the rice transplanter according to the first aspect, the shaft member constituting the planting depth adjusting shaft is shifted in phase with respect to another adjacent shaft member. Because it was possible to connect, it is possible to adjust the left and right ends of the planting part to the deep planting side, whereby the unevenness of the tillage is severe and the rolling control device can not respond and the planting part Even if it is inclined, it is possible to prevent floating seedlings and rolling seedlings by adjusting the strips on both ends to the deep planting side in advance.

According to a third aspect of the present invention, a chain case is attached from a planting center case via a connecting pipe, and a plurality of arms are mounted on a planting depth adjusting shaft which is horizontally supported so as to be rotatable horizontally in the left-right direction. At the planting portion of a rice transplanter having a base end fixed and a plurality of floats pivotally supported at the distal end of the arm, the connecting pipe supports the planting depth adjusting shaft via a supporting member. Therefore, there is no need to provide a mounting screw boss in the planting center case, and a simple configuration can be achieved. In addition, there is no fear that oil leakage will occur when the joint is fastened together with the housing of the planting center case as in the related art.

[Brief description of the drawings]

FIG. 1 is a side view showing the overall configuration of a rice transplanter provided with a planting section according to one embodiment of the present invention.

FIG. 2 is a plan view showing a configuration in which a rear part of a float is suspended from a main planting section.

FIG. 3 is a side view showing a configuration near a center float.

FIG. 4 is a side view showing a configuration near a second side float.

FIG. 5 is a perspective view showing a configuration of a planting depth adjusting shaft.

FIG. 6 is an exploded perspective view showing a structure for connecting a shaft member (pipe) constituting a planting depth adjusting shaft.

7 is an enlarged perspective view showing a state where a shaft member (pipe) is connected and fixed from the state of FIG. 6;

FIG. 8 is an enlarged perspective view showing a state where the right and left pipes are connected and fixed with a phase shifted from the center pipe.

FIG. 9 is a perspective view showing the relationship between the height of the rotation fulcrum at the rear portion of the float when the pipes on the left and right sides are connected and fixed while being shifted in phase from the center pipe.

FIG. 10 is a partial cross-sectional side view showing a state where the planting depth adjusting shaft is supported by a connecting pipe.

[Explanation of symbols]

A Rice transplanter 4 Planting part 17 Planting claw 20 Center case 21 Chain case 38 Planting depth adjusting shaft 38L / 38C / 38R Shaft member (left pipe / center pipe / right pipe) 34/35/35 'float 87 Arm (planting depth adjustment arm) 95 Connecting pipe 96 Support member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoichiro Nishi 1-32 Chayacho, Kita-ku, Osaka-shi, Osaka Inside Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Yuichi Kato 1-32, Chaya-cho, Kita-ku, Osaka-shi, Osaka No. Within Yanmar Agricultural Machinery Co., Ltd. (72) Inventor Satoshi Maekawa 1-32 Chayacho, Kita-ku, Osaka City, Osaka Prefecture F-term within the Yanmar Agricultural Machinery Co., Ltd. 2B063 AA10 AB01 BB08 BB50

Claims (3)

[Claims] 1. A base end of a plurality of arms is fixedly mounted on a planting depth adjusting shaft which is horizontally supported so as to be rotatable in the left-right horizontal direction, and a rear end of a plurality of floats is pivotally supported at a tip of the arm. Then, by changing the height of the rear fulcrum of the float by the rotation of the planting depth adjusting shaft, in the planting portion of the rice transplanter to change the planting depth, the planting depth adjusting shaft, a plurality of A planting part for a rice transplanter, wherein shaft members are connected in a straight line. 2. The planting portion of a rice transplanter according to claim 1, wherein the shaft member constituting the planting depth adjusting shaft can be connected to another adjacent shaft member with a phase shift. The planting section of a rice transplanter characterized by the following. 3. A chain case is attached from a planting center case via a connecting pipe, and base ends of a plurality of arms are fixedly mounted on a planting depth adjusting shaft which is horizontally supported so as to be rotatable in the left-right horizontal direction. And, in the planting portion of the rice transplanter having a configuration in which the rear portions of the plurality of floats are pivotally supported at the tip of the arm, the planting depth adjusting shaft is supported on the connecting pipe via a supporting member. Planting department of rice transplanter.