JP3388557B2 - Rolling control device for planting part in transplanter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling control device for a planting part in a transplanter such as a riding type rice transplanter.

[0002]

BACKGROUND OF THE INVENTION Generally,
This kind of transplanting machine includes a machine in which a planting portion which is connected in a freely rolling manner is controlled in a rolling manner by means of a pair of left and right rolling ammunition. In this type, a rolling amount (rolling ammunition) that can be controlled is used. Since there is a limit to the effective range of the machine), there is a drawback that the planting part is largely inclined following the rolling of the traveling machine body in a field with large unevenness. Therefore, a rolling intermediate member is provided on the traveling body side and the planting portion side, and the rolling ammunition is interposed between the intermediate member and the planting portion side, while the intermediate member and the traveling body body side are provided. It is proposed that a forced rolling control mechanism that controls rolling of the intermediate member based on actuator drive is provided between the above and the above. That is, since it is possible to horizontally control the intermediate member that serves as the urging force reference point of the rolling ammunition, the following rolling control by the rolling ammunition can be performed.
It becomes possible to make it effective regardless of the rolling of the traveling machine body, and it is possible to improve the control accuracy by always maintaining the biasing forces of the left and right rolling ammunition in a good balance state. However, in the past, since the rolling ammunition was provided only between the intermediate member and the seedling mounting table provided on the planting section (which is laterally fed in synchronization with the planting timing),
This rolling ammunition is required to have both the function of regulating the rolling of the planting part due to the lateral feed of the seedling mounting table and the function of balancing the overall load of the planting part. It is extremely difficult to set the force, and since the force is set to be strong to balance the overall load of the planting part, a large moment acts on the intermediate member and
There was also the inconvenience of hindering the smooth rolling operation of R>.

[0003]

SUMMARY OF THE INVENTION The present invention was created with the object of providing a rolling control device for a planting part in a transplanter capable of eliminating these drawbacks in view of the above circumstances. There is a transplanting unit in which a planting unit provided with a seedling mounting table that is movable left and right with respect to the planting unit main body is connected to the traveling machine body so that it can be rolled freely, phase with respect to the traveling machine body side and the planting portion
Rolling can be freely performed, and its rolling fulcrum
So that it matches the rolling fulcrum of the planting part
A material is provided, and a forced rolling control mechanism for rolling-controlling the intermediate member based on actuator drive is provided between the intermediate member and the traveling body side, while the seedling mounting table is provided between the intermediate member and the seedling mounting table. A pair of left and right rolling ammunition is installed to regulate the rolling of the planting part due to the lateral movement of the platform, and a left and right pair that balances the entire load of the planting part is provided between the intermediate member and the body of the planting part. interposed Then share the balance bullets machine
In addition, the connecting position of the intermediate member of the rolling ammunition is
The upper part of the ring control mechanism connects the intermediate member of the balance ammunition
The position is characterized by being set under the forced rolling control mechanism . Further, the balance ammunition is characterized in that the rolling support portions of the intermediate member are arranged in a direction substantially orthogonal to each other in a side view. The present invention, by this configuration, simplifies the biasing force setting of the rolling ammunition and enables the biasing force setting capable of accurately balancing the unbalanced load of the seedling mounting table to contribute to the improvement of the precision of rolling control. It was made possible.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a riding type rice transplanter, and a rear part of the traveling machine body 1 is connected to a planting work section 3 via an elevating link mechanism 2 for hydraulically moving up and down. The planting work unit 3 is detachably connected to the rear end of the elevating link mechanism 2 and has a holder frame 4 integrally provided with a boss 4a facing the front and rear at the lower end, and the holder frame 4. A rolling support shaft 5 that is rotatably supported by a boss 4a of the rolling support shaft 5 through a bearing, and is integrally connected to the rear end of the rolling support shaft 5 and has seedling table support stays 6a on both left and right sides. Working part frame 6 provided, planter case 7 integrally assembled to working part frame 6, planter arm 8 arranged in parallel with planter case 7, upper end part of seedling table supporting stay 6a and planter case 7
The bottom of the planter case 7 and the planter case 7 in a forward tilted position, which is supported by the upper end portion of the plant so as to be able to reciprocate left and right through the slide piece S and is forcibly fed laterally in accordance with the scraping timing of the planter arm 8. The float 10 and the like are provided at predetermined intervals in the left-right direction. That is, the planting work unit 3 is supported rotatably on the holder frame 4 connected to the traveling machine body 1 via the elevating link mechanism 2 via the rolling support shaft 5, but the basic configuration described above is Both are conventional.

The elevator link mechanism 2 includes a single upper link 2a, a pair of left and right lower links 2b, and each link 2
The so-called three-point link mechanism is provided with a link holder (not shown) that connects the rear ends of a and 2b.
Then, in the state where the link holder is integrally connected to the holder frame 4, it swings up and down based on the expansion and contraction of the lift cylinder (not shown) connected to the upper link 2a or the lower link 2b, so that the planting work unit. 3 is moved up and down.

Reference numeral 12 denotes an intermediate frame provided between the holder frame 4 and the planting work portion 3, and a boss portion integrally formed at the lower end of the intermediate frame 12 in the front-rear direction. 12 a is rotatably fitted and supported on the boss portion 4 a of the holder frame 4. That is, the intermediate frame 1
2 is capable of rolling relative to the holder frame 4 and the planting work part 3, and the rolling fulcrum thereof coincides with the rolling fulcrum of the planting work part 3. Further, the intermediate frame 12 is composed of a frame body 12b in an upright posture, and a T-shaped frame portion 12c protruding forward from the upper end of the frame body 12b along the back side surface of the seedling stand 9. However, the intermediate frame 12 in a side view is arranged so as to be located between the seedling placing table support stay 6 a and the seedling placing table 9.

Reference numeral 13 is a rolling ammunition composed of a pair of left and right coil ammunition .
As described in 3, the forced rolling control mechanism described later
It is provided in a V shape between the T-shaped frame portion 12c of the intermediate frame 12 located on the upper side and the left and right ends of the seedling placing table 9. That is, the left and right rolling ammunition 13 expands and contracts reciprocally along with the lateral feeding of the seedling mounting table 9 to balance the unbalanced load of the seedling mounting table 9, and the lateral loading of the seedling mounting table 9 is performed based on this balance action. The rolling of the planting work unit 3 is restricted.

Reference numeral 14 is a balance bullet which is composed of a pair of left and right coil bullets . The balance bullet 14 is shown in FIG.
As shown, the forced rolling control mechanism described later
The frame body 12 of the intermediate frame 12 located on the lower side
Although it is provided in a V shape between b and the working unit frame 6, its urging force is set so as to balance the entire load of the planting working unit 3. That is, a so-called driven rolling control in which the planting work unit 3 is held by the rolling bullet 13 and the balance bullet 14 to allow a follower field-following action of the planting work unit 3 based on the buoyancy of the float 10. However, since the rolling ammunition 13 that balances the unbalanced load due to the lateral feeding of the seedling mounting table 9 and the balance ammunition 14 that balances the entire load of the planting work unit 3 are separately provided, It is possible to simplify the setting of the urging force of each ammunition 13, 14 and to set the optimum urging force corresponding to the load to be balanced.

By the way, the balance ammunition 14 is provided between an ammunition bracket 15 projecting laterally from an intermediate portion of the intermediate frame 12 and an ammunition bracket 16 projecting forward from both left and right sides of the working unit frame 6. The arranging direction is set such that the boss portion 12a of the intermediate frame 12 is orthogonal to the boss portion 12a in a side view, so that the biasing force of the balance ammunition 14 causes a moment to act on the intermediate frame 12. Can be avoided.

Reference numeral 17 denotes a motor with a speed reduction mechanism which is provided at a lateral position of the holder frame 4 via a base 18, and the pinion gear 1 for outputting the driving force of the motor 17 is provided.
The large-diameter gear portion 19a of the intermediate gear 19 meshes with the 7a, and the small-diameter gear portion 19b that rotates integrally with the large-diameter gear portion 19a is provided on the rack 20 that projects laterally from the intermediate frame 12. It meshes from above. That is, between the holder frame 4 and the intermediate frame 12, a forced rolling control mechanism for forcibly rolling the intermediate frame 12 in the left-right direction based on the drive of the motor 17 is formed. Is a front seedling table support stay 6a,
It is set in a space that is surrounded by the rear seedling stand 9 and the lower planter case 7 and has a substantially triangular shape in a side view. Therefore, the forced rolling control mechanism can be effectively protected from water, mud, obstacles, and the like. It is like this.

The base 18 is formed with a screw hole 18a for fixing the motor 17 with a screw, a shaft through hole 18b for penetrating the motor shaft, and the like. A gear assembling hole 18c for rotatably assembling 19 is machined. That is, since the motor 17 and the intermediate gear 19 are assembled to the base 18 in advance, the meshing depth adjustment (backlash adjustment) between the pinion gear 17a and the intermediate gear 19 is automatically performed at the dimension management stage during the hole machining. It is supposed to be done.

Further, a mounting piece 18e having a pair of upper and lower mounting holes 18d is bent and formed on one side edge of the base 18. Then, the base 18 is integrally attached to the side surface portion of the holder frame 4 by tightening the bolt 21 and the nut 21a which are inserted into the attachment hole 18e and the attachment hole 4b on the holder frame 4 side. The hole 18d is formed as a long hole that is long in the vertical direction. Therefore, when the bolt 21 is loosened, the base 18 can be slid vertically to adjust the meshing depth of the intermediate gear 19 and the rack 20. It is like this.

Reference numeral 22 denotes a cover body assembled to the base 18. The cover body 22 covers a front, rear, outer side and lower side of the base 18, and an upper opening of the cover body 22a. And an upper cover 22b which is detachably provided. And the cover body 2
The reference numeral 2 covers the forced rolling control mechanism composed of the motor 17, the intermediate gear 19 and the rack 20 to protect these parts from water, mud, obstacles and the like. The upper opening can be opened and closed based on the attachment / detachment of the upper cover 22b.

By the way, the rack 20 is formed in an arc shape centering on the rolling fulcrum of the intermediate frame 12, and meshing teeth 20a are formed on the outer peripheral side thereof to secure a meshing range with the intermediate gear 20. However, at both ends of the meshing range, the cut-up portion 20b is formed with no meshing teeth.
Are formed respectively. Therefore, when the meshing position of the intermediate gear 19 reaches the rounded-up portion 20b, the meshing with the intermediate gear 19 is rejected and the further forced rolling operation of the intermediate frame 12 is mechanically restricted. .

Reference numeral 23 denotes a pendulum type rolling detection sensor provided on the rear surface of the intermediate frame 12 via a sensor bracket 23a.
The rolling detection value of 3 is input to a control unit (not shown). Then, in the control section, the motor 17 is driven in the forward and reverse directions so that the input rolling detection value matches a predetermined set value (horizontal set value or tilt set value), and the intermediate frame 1 is controlled based on this motor control.
2 is subjected to forced rolling control (horizontal control or tilt control) in a fixed posture.

Reference numeral 24 is a stopper pin projecting rearward from the intermediate frame 12, and the stopper pin 24
Is loosely fitted into the recess 25 a of the stopper plate 25 that is provided integrally with the planter case 7 to form a rolling regulation mechanism of the planting work unit 3. That is, the stopper pin 24 allows the rolling of the planting work unit 3 if the rolling angle of the planting work unit 3 with respect to the intermediate frame 12 is within a predetermined angle, but the planting work unit 3 with respect to the intermediate frame 12 is allowed. When the relative rolling angle of (1) reaches a predetermined angle, the rolling contact of the recessed portion 25a is abutted on the left and right ends of the recessed portion 25a to restrict further rolling of the planting work portion 3.

26 is a T-shaped frame 1 of the intermediate frame 12.
In the hanging bracket protruding downward from 2c, the lower end portion of the hanging bracket 26 is slidably contacted with the front surface of a guide plate 27 provided at the upper end portion of the holder frame 4. That is, a tilting restraint mechanism that restrains the tilting of the intermediate frame 12 that receives the urging force of the rolling bullet 13 toward the rear on the basis of the contact of the hanging bracket 26 with the guide plate 27 is configured.

Further, a pair of left and right tubular members 26a are provided so as to project from the guide plate contact surface of the hanging bracket 26. A part of each tubular member 26a is exposed from the tip of the tubular member 26a and is guided. Ball 2 that abuts plate 27 so that it can roll freely
8 are accommodated. That is, the sliding resistance between the hanging bracket 26 and the guide plate 27 due to the rolling of the intermediate frame 12 is minimized.

A pair of left and right bent pieces 27a are formed at the left and right ends of the guide plate 27 so as to face each other with the lower end of the hanging bracket 26 interposed therebetween.
7a are provided with limit switches 29 that detect and operate based on contact with left and right contact pieces 26b formed on the hanging bracket 26. That is, the left and right limit switches 29 detect that the rolling angle of the intermediate frame 12 relative to the holder frame 4 has reached a predetermined angle, and output the detection signal to the control section to output the motor 17 to the controller. The limit is automatically stopped.

Reference numeral 30 designates a pair of left and right stopper brackets provided at predetermined positions (left and right lower link 2b intervals) at the left and right positions of the working section frame 6, the stopper brackets 30 projecting forward, and their projecting tips. Has
A stopper bolt 31 that faces the lower surface of the left and right lower links 2b is screwed so as to be able to move back and forth in the vertical direction. That is, when the lifting link mechanism 2 is hydraulically operated to raise the planting work unit 3, the left and right lower links 2b come into contact with the left and right stopper bolts 31, respectively, at the substantially upper limit position. The working unit 3 is forcibly returned to the parallel posture, and the rolling with respect to the traveling machine body 1 is locked.

Reference numeral 32 denotes a pair of left and right regulating plates provided on the left and right lower links 2b so as to be swingable back and forth. The regulating plates 32 are scraping amount adjusting levers 50 arranged around the lifting link mechanism 2. In order to avoid interference with the paste fertilizer supply pipe 51 or the like, the protrusion pin 33 protrudes from the lower link 2b to an empty space below, but the regulation pin 33 protrudes from the side surface of the stopper bracket 30 in the elongated hole 32a formed in the regulation plate 32. Are loosely engaged. Further, since the regulation pin 33 is located in the middle portion of the long hole 32a when the planting work section 3 has a normal planting height,
Even if the provisional planting work unit 3 rolls to the maximum within the allowable range of the stopper pin 24, it does not contact the lower end of the elongated hole 32a, but the planting exceeds a predetermined height H1 lower than the normal planting height. When the working unit 3 descends, the lower link 2
b together with the change of the relative angle between the planting work unit 3b
3 approaches the lower end of the slot 32a, and in this state,
Since the permissible dimension L (rolling permissible range) of the regulation pin 33 with respect to the long hole 32a is smaller than the permissible range of the stopper pin 24, the abutment of the regulation pin 33 with the regulation plate 32 causes the planting work unit 3 to move. The rolling tolerance is regulated. Furthermore, since the movement allowable dimension L becomes smaller as the planting work unit 3 descends,
The rolling regulation amount increases as the height H1 is lowered from the predetermined height H1, and only a slight rolling of the planting work unit 3 is allowed at the stage when the predetermined height H2 below the wheel ground contact surface height H0 is reached. It is like this. That is, the planting work unit 3 approaches the rear wheel 1a of the traveling machine body 1 as it descends due to the link characteristic of the lifting link mechanism 2, and therefore, in the state of descending beyond the predetermined height H1, the rear part of the rear wheel 1a is located. There is a risk that the float 10 located at will interfere with the rear wheel 1a as the planting work section 3 rolls, but the float 10 and the rear wheel 1a will be separated based on the rolling restriction by the restriction pin 33 and the restriction plate 32. It is designed to avoid interference. In addition, L1 is the allowable movement dimension in the height H1 state, and L2 (<L1) is the allowable movement dimension in the height H2 state.

In the embodiment of the present invention configured as described above, a rolling intermediate frame 12 is provided between the holder frame 4 and the planting work section 3, and the intermediate frame 12 and the seedling stand 9 are connected. In between, a rolling bullet 13 for rollingly controlling the planting work unit 3 is provided, while
A forced rolling control mechanism for forcibly rolling-controlling the intermediate frame 12 in a fixed posture is provided between the intermediate frame 12 and the holder frame 4. In between, a balance ammunition machine 14 for balancing the entire load of the planting work unit 3 is provided. That is, the rolling bullet 13
In addition, without providing both the unbalanced load balancing function of the seedling placing table 9 and the overall load balancing function of the planting work section 3, a dedicated ammo equipped with each function is separately provided, It is possible to simplify the setting of the biasing forces of the bullets 13 and 14, and to set the optimum biasing force corresponding to the load to be balanced, and as a result, it is possible to improve the accuracy in rolling control.

Moreover, since the urging force of the rolling ammunition 13 can be weakened, it is possible to prevent the urging force of the rolling ammunition 13 from exerting a large moment on the intermediate frame 12, and thus the smoothing of the intermediate frame 12 can be prevented. Rolling operation can be enabled.

Further, since the balance ammunition 14 is arranged in a direction orthogonal to the boss portion 12a of the intermediate frame 12, the biasing force of the balance ammunition 14 exerts a moment on the intermediate frame 12. Therefore, the rolling operation of the intermediate frame 12 can be smoothly performed, and the boss portion 12a need not be strengthened, which contributes to reduction in size and weight of the entire device.

[0025]

In summary, since the present invention is constructed as described above, rolling-free intermediate members are provided on the traveling machine body side and the planting section side, and between the intermediate member and the traveling machine body side. While a forced rolling control mechanism is installed in the plant, a pair of left and right rolling ammunition is installed between the intermediate member and the seedling stand to perform complex rolling control. Since a pair of left and right balance ammunition that balances the entire load of the planting part is provided between the part main body and the part main body, the rolling ammunition is a rolling part of the planting part accompanying the lateral movement of the seedling mounting table. Therefore, it is only necessary to have a function to regulate the rolling force. Therefore, it is possible to simplify the setting of the biasing force of the rolling ammunition, or to set the biasing force that can balance the uneven load of the seedling mounting table with high accuracy. And the control of rolling It is possible to contribute to the improvement.

Moreover, since the rolling bullet does not require a strong urging force to balance the entire load of the machine body, a large moment is applied to the intermediate member as in the conventional case where the urging force is set strongly. As a result, the rolling operation of the intermediate member can be smoothed.

Further, the arrangement direction of the balance ammunition is
When the rolling support portion of the intermediate member is set in a direction substantially orthogonal to the side view, it is possible to prevent the balance bullet from exerting a moment on the intermediate member, so that the rolling operation of the intermediate member can be made smoother. In addition, it is possible to reduce the size and weight of the rolling support portion as compared with the case where the rolling support portion is reinforced to withstand the moment.

[Brief description of drawings]

FIG. 1 is a side view of a riding-type rice transplanter.

FIG. 2 is a side view of a main part of a planting work unit.

FIG. 3 is a front view of a main part of the same.

FIG. 4 is an enlarged plan view of an essential part of the same.

FIG. 5 is a perspective view of a forced rolling control mechanism.

FIG. 6 is a front view showing the operation of the rolling regulation mechanism.

FIG. 7 is a side view of the same.

[Explanation of symbols]

1 traveling aircraft 2 Lifting link mechanism 3 Planting work department 4 holder frame 5 rolling spindle 6 Working unit frame 6a Seedling stand support stay 9 seedling stand 12 middle frame 12a Boss 13 rolling ammo 14 Balance ammo 17 motor 18 base 19 Intermediate gear 20 racks 32 regulation plate 33 Control pin

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor, Ryo Tsukahara               Shimane Prefecture Higashi-Izumo Town Higashi Izumo Town Oya 667               Ground 1 Mitsubishi Agricultural Machinery Co., Ltd.                (56) Reference JP-A-5-49318 (JP, A)                 JP-A-5-252806 (JP, A)                 58-115916 (JP, U)

Claims (2)

(57) [Claims] 1. A transplanter in which a planting section provided with a seedling table that is movable left and right with respect to a planting section main body is connected to a traveling machine body so as to be able to roll freely. , Relative to the traveling body side and the planting part side
Can be freely rolled, and its rolling fulcrum is planted.
An intermediate member is provided so as to coincide with a rolling fulcrum of the attached portion, and a forced rolling control mechanism for controlling rolling of the intermediate member based on actuator drive is provided between the intermediate member and the traveling body side. On the other hand, between the intermediate member and the seedling placing table, a pair of left and right rolling bullets that regulate the rolling of the planting section due to the lateral movement of the seedling placing table are provided, and the intermediate member and the planting section body are further provided. In between, a pair of left and right balance ammunition that balances the entire load of the planting part is provided ,
The connecting position of the intermediate member of the rolling ammunition is forced rolling.
At the upper part of the control mechanism, the intermediate member connection position of the balance ammunition
Is a rolling control device for a planting part in a transplanter, which is set below the forced rolling control mechanism . 2. The rolling control device for a planting part in a transplanter according to claim 1, wherein the rolling support part of the intermediate member is arranged in a direction substantially orthogonal to the side view when viewed from a side. .