JP3330766B2 - Non-constant traverse feeder for seedling table - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traverse speed of a seedling table in a planting section of a rice transplanter.

[0002]

2. Description of the Related Art In a planting section of a rice transplanter, a seedling table is reciprocated in a horizontal direction, a certain amount of seedling is cut out from a seedling opening at the lower end of the seedling table by a planting claw, and the seedling is conveyed downward. Planted in the field. Conventionally, the lateral movement of the seedling pedestal was at a constant speed, but in recent years, with the development of gear processing technology, non-circular gears can be used, and the lateral feed drive of the seedling pedestal, that is, the planting mission A non-circular gear is placed in the case to make the lateral movement speed of the seedling mounting table uneven, and when cutting with the planting claw, the lateral movement speed of the seedling mounting table is made as slow as possible to reduce the planting posture. It has been configured to be stable.

[0003]

Thus, the lateral feeding speed of the seedling mounting table is made non-uniform so that the lateral feeding speed becomes the minimum when the planting claw removes the seedling from the seedling mounting table. In other words, the seedling picking was ensured, and in other cases, the seedling mounting table was quickly traversed so as to move to the next seedling picking / planting as soon as possible.

However, considering the relationship between the lateral feed speed and the acceleration of the seedling mounting table and the positional relationship of the seedlings, the lateral feed speed is synchronized with the rotation of the planting claws as shown in FIG. Therefore, the position of the highest speed is a position where the speed changes from acceleration to deceleration, and the position of the lowest speed is a position where the speed changes from deceleration to acceleration. In other words, setting the traverse speed to the minimum speed when picking up seedlings means that the seedlings are accelerated immediately after picking up the seedlings, cut out the seedlings from the seedling opening and transport them downward, and when passing the seedling guide, In the upper seedling opening, the next seedling to be picked is sent, and the lateral feed speed of the seedling mounting table is accelerated and increased, and the leaves grasped by the planting claw pass through the leaves The next seedling to be picked up quickly rubs against the seedling conveyed downward, and the seedling to be planted is pulled, sometimes disturbing the planting posture.

[0005]

The present invention uses the following means in order to solve the above problems. That is, in a configuration in which the lateral feeding speed of the seedling table in the planting section of the rice transplanter is made to be non-uniform in accordance with the rotation of the planting claw, the lateral movement of the seedling table before the planting claw splits the seedling. The maximum position of the feed speed is set, the minimum position of the lateral feed speed is set at a substantially intermediate position from the seedling division to the start of planting, and a deceleration section is set between the two positions. Set so that the amount of deceleration of the traverse speed of the platform becomes the maximum and the average speed,
Further, when the tip of the planting claw passes through a seedling guide extending downward from the seedling opening, the lateral feeding speed of the seedling mounting table is set to be the minimum speed.

[0006]

By using such a means, when cutting a seedling from a seedling mat by a planting claw at a seedling opening of a seedling mounting table, the lateral feed speed of the seedling mounting table is reduced to an average speed. The degree of deceleration at the time (minus acceleration) is large, that is, the braking force is large, but since the planting claws are located between the cut seedling and the next seedling, the effect of rubbing is small and the seedling removal is stable . Even after that, the stem portions of the cut seedlings are rubbed, but the stalk portion has a small lateral spread and little friction, so that the rubbing effect is small. Then, since the lateral feed speed becomes the lowest speed and the acceleration is small until the cut seedling reaches the lower end of the seedling guide, the friction between the cut seedling and the next seedling at the seedling opening is relatively small. It is suppressed and the catch is small. After that, the lateral feed speed increases and the acceleration increases, but since the top of the cut seedling leaves through the seedling opening, the effect of rubbing is reduced, and the seedling is planted.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention; 1 is a side sectional view of a portion of a planting section of a rice transplanter, FIG. 2 is a side view of a planting transmission case and a planting transmission case, FIG. 3 is a front sectional view of a planting transmission case, and FIG. FIG. 5 is a side view showing the lateral feed speed ratio of the seedling mounting table to the rotation position of the nail, and FIG. 5 is a diagram showing the relationship between the lateral feed speed of the seedling mounting table and the acceleration.

The configuration of the planting section B of the rice transplanter will be described with reference to FIGS. In the rice transplanter, a planting portion B is attached to a rear portion of a traveling vehicle body, and power is transmitted to a planting transmission case M of the planting portion from a power take-off shaft on the traveling vehicle body side. This power is used to drive the lateral transport of the seedling mounting table 12, the transport driving of the seedling feed belt 13 disposed at the lower end of the seedling mounting table 12, and the plurality of powers projecting rearward from the planting mission case M. The rotary case 19 disposed at the rear end thereof is driven to rotate through the planting transmission case 18 to drive the planting claw 20 disposed at the tip of the rotary case 19 so as to plant seedlings in the field. I have to. In addition, a float 22 is suspended from the lowermost part of the planting portion so as to be able to move up and down.

The input shaft 1 projects forward from the center of the front end of the planting transmission case M. In the planting transmission case M, a bevel gear 1a is provided at the end of the input shaft 1 and meshes with a bevel gear 2a of a transmission shaft 2 which is suspended in the left-right direction. Transmission shaft 2
, A sprocket 2b and a non-circular gear 2c are fixedly mounted. From the sprocket 2b, a chain is wound around a sprocket 4a fixedly mounted on the planting drive output shaft 4 for transmission.

On the other hand, the non-circular gear 2c meshes with a non-circular driven gear 3a fixed to a traverse transmission shaft 3 mounted in parallel with the transmission shaft 2 to move the traverse transmission shaft 3 to be described later. Rotational drive is possible with a gradual increase or decrease to achieve speed. Within the planting transmission case M, the transverse feed shaft 3
On the other side, a plurality of transmission gears 10a, 10b, 10c.
10d is loosely fitted, and a groove 3b is formed in the outer peripheral portion of the lateral feed shaft 3 in the axial direction, and the shifter 5 is slidably fitted therein. 5 is
The shifter 5 is slid by manual operation of the shift gears 10a, 10b, 10
By fitting one of c.10d from the inside, it is configured to be able to rotate integrally with the transverse feed shaft 3 via the shifter 5. In the present embodiment, four speed change gears 10a, 10b, 10c, and 10d are provided so that the speed can be changed in four stages, but the speed is not limited.

Each transmission gear 10a, 10b, 10c, 10
d meshes with driven gears 17a, 17b, 17c, 17d fixed to the other side in the planting transmission case M of the traverse shaft 6 mounted in parallel with the traverse transmission shaft 3. Transmission gear 10a with which the shifter 5 is in contact
The driven gear 17a meshed with 10b, 10c, 10d
17b, 17c, and 17d are driven, and the transverse feed shaft 6 is configured to rotate. In the planting transmission case M, a sprocket 6a is fixedly mounted on one side of the lateral feed shaft 6, and the sprocket 6a is also used to vertically extend the shaft in the planting mission case M. The vertical feed shaft 7 is linked to the horizontal feed shaft 6 by winding a chain around a sprocket 7b fixed to the shaft 7.

The transverse feed mechanism is shown in FIGS.
It is also possible to configure as follows. That is, the transmission shaft 2 has a sprocket 2b and a plurality of non-circular gears 2c.
Are fixed, and the non-circular gears 2c are fixed.
Are engaged with non-circular driven gears 3a, 3a,... Which are loosely fitted to a transverse feed shaft 3 which is mounted in parallel with the transmission shaft 2.
The non-circular gears 2c have the same shape, and the non-circular driven gears 3a have the same gear ratio. The gears can be produced in large quantities by press working or the like. Like that. And
The non-circular driven gears 3a, 3a,... Have circular transmission gears 10a, 10b, 10c.
10d are fixed in parallel on the side surfaces one by one,
A pair of the non-circular driven gear and the transmission gear 10 is freely rotatably fitted to the transverse feed transmission shaft 3.

A driven gear 17a, 17b, 17c, 17d of a perfect circle is fixedly mounted on one side in the planting transmission case M on a transverse feed shaft 6 mounted in parallel with the transverse feed shaft 3.
The transmission gears 10a, 10b, 10c, and 10d are in mesh with each other. Further, the non-circular gear 2c of the transmission shaft 2
.. 2c: a groove 2 on the outer peripheral portion of the outer fitting portion in the axial direction.
d is slidably fitted into the groove 2d, and the shifter 5 is slidably fitted into one of the non-circular gears 2c. The non-circular driven gear 3a is rotated from the non-circular gear 2c, and one of the transmission gears 10 fixed to the non-circular driven gear 3a is simultaneously rotated, and the rotation speed is unequal. Driven. Power is transmitted to a driven gear 17 meshed with the transmission gear 10, and the transverse feed shaft 6 is configured to rotate.

The non-circular gear 2c and the non-circular driven gear 3a
The engagement position is such that the planting claw 20 is positioned at a predetermined position (for example, a seedling collecting position), the seedling mounting table 12 is also aligned with the position of the seedling opening 11a (actually, the punch mark position of the gear), and the non-circular gear 2c, The non-circular driven gear 3a, the transmission gear 10, and the driven gear 17 are assembled. In the former case, the position of the non-circular gear and the regular circular gear were separated, and the timing was adjusted by the regular circular gear, so an error occurred during assembly, and the timing of the lateral feed and the rotation of the planting claw was easily shifted, but the latter In the embodiment, since the non-circular gear and the perfect circular gear are paired, errors are less likely to occur.

A helical groove (not shown) is reciprocally formed in a portion of the lateral feed shaft 6 protruding from the planted transmission case M, and a sliding member receiver is slidably slidably formed on the groove. It is fitted and connected to the seedling mounting table 12 via the connecting member in the sliding child receiver. Therefore, when the transverse feed shaft 6 rotates, the sliding child receiver slides back and forth along the groove, and the seedling mounting table 12 slides back and forth on the guide rail 11.

On the other hand, on the shaft of the vertical feed shaft 7 outside the planting transmission case M, there are provided vertical feed cams 7a.
As shown in FIG. 2, a driven cam attached via a one-way clutch to a transport shaft 14 for rotating a seedling feed belt 13 of the seedling mounting table 12, as shown in FIG. 15 are arranged so that the front end faces. Therefore, when the vertical feed shaft 7 is driven to rotate in synchronization with the rotation of the horizontal feed shaft 6, when the slide receiver on the horizontal feed shaft 6 reaches the sliding left and right end position, the vertical feed cam 7a is driven. The guide rail 11 is brought into contact with the cam 15, rotates the driven cam 15, drives the seedling feed belt 13, lowers the seedling mat set thereon by a fixed amount, and places the lower end of the seedling mounting table 12. Send it up. The planting claw 2 is disposed at the rear end of the planting transmission case 18 from the planting output shaft 4.
The rotation is transmitted to the rotary case 19 to which the 0 is attached, and the planting claw 20 is rotated.

The guide rail 11 is provided with a seedling opening 11a for each planting strip.
A seedling guide 11b is provided vertically for stabilizing the seedlings conveyed at 0, and the planting claws 20 grasp the seedlings located on the seedling opening 11a and plant the seedlings in the seedling guide 11b. The tips of the claws 20 are guided, and the seedlings are conveyed downward and released and planted in the field. The seedling mounting table 12 is moved laterally.
The seedling mat placed on the guide rail 11 is slid laterally, and the seedling to be split next is fed into the seedling opening 11a.
In this manner, the seedlings placed on the guide rails 11 are sequentially sent to the seedling placement table 11a by the seedling placement table 11a, and when the seedling placement table 12 reaches the end position of the lateral movement, the seedlings placed on the guide rails 11 are removed. All the seedlings for the width of one seedling mat have been planted. At this time, the seedling mat is driven downward by driving the seedling feeding belt 13 and the lower end thereof is placed on the guide rail 11. Planting is performed by moving the table 12 to the opposite side. By repeating this, the planting operation is performed.

Next, the timing of the lateral feed speed of the seedling mounting table 12, which is a main part of the present invention, will be described. As mentioned above,
The lateral feed speed of the seedling table 12 is not uniform, but this does not interfere with the lateral feed of the seedling mat when the planting claws 20 do not pass through the seedling opening 11a. While the lateral feeding is accelerated, when the planting claw 20 cuts and transports the seedling from the seedling mounting table 12, the divided seedling and the next seedling to be fed are rubbed at the seedling opening 11a.
When the divided seedlings pass through the seedling opening 11a of the seedling mounting base 12, it is necessary to reduce the lateral feed speed so that the seedlings to be planted can be accurately planted in the field without disturbing the posture.

Therefore, the lateral feed speed of the seedling table 12 at each position where the planting claw 20 is rotating is set as shown in FIGS. That is, in this embodiment, the average value of the traverse speed ratio is set to 1.0, the maximum speed is set to 1.5, and the minimum speed is set to about 0.5. FIG. 5 shows the traverse speed V and the acceleration A
Shows the relationship. In the case of a rotary planting device, planting is performed twice while one planting claw rotates once, so that the position H at which the planting claw reaches the maximum speed is set before the tip of the planting claw 20 passes through the seedling opening 11a. The position L where the plant is located at the substantially rising end and before the planting position is set, and the position L where the speed is the lowest is approximately the middle position when the tip of the planting claw 20 is completed with the planting opening 11a and the planting,
That is, it is set at a position passing through the middle part of the seedling guide 11b and in the middle of ascending after planting, and a position having an average speed is P, and a seedling picking position P1 and P2 after passing the lower end of the seedling guide 11b are set.
And P3 after passing the planting position and P4 before the rising end.

By setting the maximum speed position H, the minimum speed position L, and the average speed position P, the tip of the planting claw 20 reaches the seedling opening 11a and takes the seedlings from the seedling mounting table 12. The horizontal movement speed of the mounting table 12 is a process in which the speed is reduced from the maximum speed to an average speed and is being reduced, and the negative acceleration is large. However, at this position, the planting claws 20 are located between the divided seedling and the next seedling sent to the seedling opening 11a, so that the divided seedling itself has little effect of rubbing.

After that, the negative acceleration decreases, the lateral feed speed becomes the minimum speed, and the acceleration (plus) until reaching the lower end of the seedling guide 11b is small. Next, seedling opening 11a
Rubbing occurs with the seedlings sent to the plant, but it is relatively light and the catch is small. After that, the lateral feed speed becomes faster and the acceleration also increases, but the cut seedlings are only the leaves at the upper end and pass through the seedling opening quickly (completion of the seedlings), so the rubbing effect Be insignificant. Then, the seedlings are planted. From this time to the upper end of the rotation trajectory, regardless of the traversing speed, the seedlings collected by the planting claws 20 provided on the other side of the rotary case 19 are planted in the same manner as described above. It is related to the seedling feeding speed of the mounting table 12. Incidentally, the positional relationship of the speed ratio of the traverse speed is determined by the shapes of the non-circular gear 2c and the non-circular driven gear 3a.

[0022]

The present invention is configured as described above.
The following effects are obtained. That is, as in claim 1, the lateral feed speed of the seedling mounting table is reduced from the maximum speed position to divide the seedlings, and the seedling collection is completed before the acceleration becomes large after reaching the minimum speed. When the seedlings are divided by the planting claws and conveyed downward, the braking force of the lateral feed speed of the seedling mounting table is maximized, the seedlings can be divided stably, and the seedlings are separated and hip breakage is reduced. The attachment posture was improved.

Further, since the lateral feeding speed of the seedling mounting table at the seedling opening is set to the average speed in the deceleration process, the force at which the divided seedlings are bitten obliquely by the planting claws. Is relatively large, the rubbing force with the next seedling reaching the seedling opening is small at the initial stage, and the posture of the cut seedling is not disturbed.

Also, when the tip of the planting claw passes through the seedling guide extending downward from the seedling opening, the lateral feeding speed of the seedling mounting table is set to the minimum speed and the acceleration is also reduced. In the divided seedlings that pass, the force of the next seedling to be pushed in the lateral direction is reduced, the rubbing force is also reduced, the force that disturbs the posture of the seedling is suppressed, and the planting posture can be improved.

[Brief description of the drawings]

FIG. 1 is a side view, partly in section, of a planting section of a rice transplanter.

FIG. 2 is a side view of a planting transmission case and a planting transmission case.

FIG. 3 is a front sectional view of a planting mission case.

FIG. 4 is a side view showing a lateral feed speed ratio of a seedling mounting table to a rotation position of a planting claw.

FIG. 5 is a diagram showing a relationship between a lateral feed speed and an acceleration of a seedling mounting table.

FIG. 6 is a front sectional view showing another embodiment of the planting mission case.

FIG. 7 is a side view of the non-circular gear.

[Explanation of symbols]

 Reference Signs List 11 Guide rail 11a Seedling opening 11b Seedling guide 12 Seedling platform 20 Planting claw

Claims (4)

(57) [Claims] In a configuration in which the lateral feed speed of a seedling mounting table in a planting section of a rice transplanter is made to be non-uniform in accordance with the rotation of a planting claw, a seedling is mounted before the planting claw performs seedling division. Setting the maximum position of the lateral feed speed of the stand, setting the minimum position of the lateral feed speed at a substantially intermediate position from the seedling division to the start of planting, and setting a deceleration section between both positions. Table unequal speed traverse device. 2. The apparatus according to claim 1, wherein when the seedlings are divided by the planting claw, the amount of reduction in the lateral feed speed of the seedling table is set to be maximum. Non-constant speed traversing device for seedling table. 3. The non-constant-speed lateral feeding device for a seedling table according to claim 1, wherein the seedling table is set to have an average lateral feeding speed when dividing the seedlings by the planting claws. Non-constant speed traverse device for seedling table. 4. The apparatus according to claim 1, wherein when the tip of the planting claw passes through a seedling guide extending downward from a seedling opening, the lateral feeding speed of the seedling table is set to a minimum. A non-constant speed traversing device for a seedling table, wherein the device is set to have a speed.