JPH0571204B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a seedling planting device for splitting seedlings one by one from a seedling pine on a seedling platform in a rice transplanter and then planting the seedlings in a field. It is related to.

[Conventional technology]

Conventionally, this type of seedling planting device was developed by, for example,
As described in Publication No. 27762, the base end of a planting body with a seedling dividing claw at the tip is connected to the aircraft body via a fan link, and the midway part of the planting body is rotated by an engine. It is pivoted to the tip of a crank fixed to a driven nail shaft, and the rotation of the crank causes the planting body to be configured so that the tip of the seedling splitting nail draws a closed loop trajectory, thereby separating the seedlings from the seedling pine. The device does not damage the seedlings when dividing the seedlings, and after the seedlings are planted in the field, the seedling dividing claws quickly escape from the seedlings after planting, thereby stabilizing the planting posture of the seedlings.

However, this method had problems such as large vibrations because the planting body oscillated up and down, and the planting speed was slow.

Therefore, in order to reduce the vibration mentioned above and increase the planting speed, the rotating case is equipped with
For example, a so-called rotary seedling planting device equipped with a plurality of planting bodies equipped with seedling dividing claws was developed by Tokuko Showa.
This method has been proposed in JP-A No. 49-17806 and Japanese Patent Application Laid-open No. 49-17807.

[Problem to be solved by the invention]

However, this rotary seedling planting device requires a mechanism for swinging each planting body so that the tips of the seedling dividing claws draw vertically long elliptical closed loop motion loci. Conventionally, this swinging motion has been configured to be performed using a crank mechanism, but with this crank mechanism, the movement is unsmooth and the speed fluctuations are large during the swinging motion, so the seedlings are There were problems in that the planting posture was unstable, it was not possible to achieve a sufficient low vibration range, and the durability was low.

The present invention aims to solve the above-mentioned conventional problems in a rotary seedling planting device.

[Means to solve the problem]

In order to achieve this object, the present invention attaches a hollow rotating case with a non-rotating sun gear built in the center to a rotating shaft that projects horizontally from a part of the machine body near the seedling stand, and A plurality of planting shafts are pivotally supported on the outer periphery of the case in parallel with the rotating shaft, and a planting body equipped with a seedling dividing claw is attached to the end of each planting shaft protruding from the rotating case. In the seedling planting device, the seedling planting device is mounted in a position facing the seedling stand, and the rotating case includes an intermediate shaft parallel to the rotating shaft at a position approximately midway between each of the planting shafts and the rotating shaft. On each intermediate shaft,
a first intermediate gear that meshes with the sun gear;
A second intermediate gear that rotates integrally with the first intermediate gear is provided, and the second intermediate gear meshes with the interlocking gear on each of the planting shafts, while At least one of the first gear train and the second gear train of the second intermediate gear and the interlocking gear is connected to an elliptical closed loop in which the tips of the seedling dividing claws of each of the planting rods are long in the vertical direction. It is constructed as a non-uniform gear train so as to draw a motion trajectory.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a transmission case in the body of a rice transplanter, and a boss body 2 protrudes horizontally from the side surface of the transmission case 1. Inside,
A rotating shaft 3 that is rotationally driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter is inserted, and an oval-shaped and A hollow rotating case 4 is fitted, and the rotating case 4 is configured to be rotated in the right direction of arrow A when viewed from the side.

A non-rotating sun gear 5 is disposed at the center of the rotating case 4 and is rotatably fitted into the boss body 2 and rotatably relative to the rotating case 4. , with an appropriate rotational phase adjustment means (not shown) for the transmission case 1,
It is locked so that it cannot rotate.

At both left and right ends of the rotating case 4, a support shaft 6 is attached to the rotating shaft 3 at an equal distance from the rotating shaft 3.
A hollow planting shaft 7 is rotatably fitted onto the supporting shaft 6, and one end of each planting shaft 7 is connected to the outside of the rotating case 4. A planting body 8 having a seedling dividing claw 9 on the protruding end thereof is attached so that the seedling dividing claw 9 of the planting body 8 faces toward the seedling platform 10. The intermediate shaft 1 is located at the intermediate position between the rotating shaft 3 and the planting shaft 7.
1 is rotatably supported parallel to the rotating shaft 3 and the planting shaft 7, and on the intermediate shaft 11 is a first shaft which is always in mesh with the sun gear 5 and has the same number of teeth as the sun gear 5. The intermediate gear 12 is fitted onto the intermediate shaft 1.
1 rotates once per rotation of the rotating case 4.

On the other hand, a second intermediate gear 13 having the same number of teeth as the first intermediate gear 12 is fitted onto the intermediate shaft 11, and a second intermediate gear on the intermediate shaft 11 is fitted onto the planting shaft 7. An interlocking gear 14 having the same number of teeth as 13 and always meshing therewith is fitted so that the planting shaft 7 rotates once per revolution of the intermediate shaft 11.

The second intermediate gear 13 and the interlocking gear 14 are eccentric gears in which the center 0 of each gear is eccentric by an appropriate dimension e from the rotation center of the respective shafts 11 and 7. It is.

In this configuration, when the rotating case 4 revolves in the right direction of arrow A by its rotating shaft 3, the first intermediate gear 12 meshing with the sun gear 5, which cannot rotate with respect to the transmission case 1, rotates as the rotating case 4 revolves. , it rotates in the right direction of arrow B by the same rotation angle as that of its revolution. This first intermediate gear 12
Since the planting shaft 7 interlocked via the second intermediate gear 13 and the interlocking gear 14 rotates in the left direction of arrow C, that is, in the opposite direction to the revolution direction of the rotating case 4, due to the rotation of the first intermediate gear 12, The planting body 8 attached to the planting shaft 7 rotates around the rotating shaft 3 while facing the direction of the seedling platform 10.
When descending from top to bottom on the side facing 0, after dividing only one seedling from the seedling pine on the seedling stand 10 with the tip of the seedling dividing claw 9, the seedling is moved to the field scene 15 near the lower limit of descent. After planting, it rises above the field scene 15.

In this case, if the second intermediate gear 13 that rotates at the same time as the first intermediate gear 12 and the interlocking gear 14 that meshes therewith are not eccentric gears, the rotation of the planting shaft 7 in the left direction of the arrow C Since the angle is the same as the rotation angle of the rightward revolution of the arrow A in the rotating case 4, the planting body 8 with the seedling dividing claw 9 attached to the planting shaft 7 rotates as the rotating case 4 revolves. , by rotating with a delay of the same rotation angle in a direction opposite to its revolution direction, each planting body 8
Since it rotates while facing the direction of the seedling platform 10 and maintaining a constant posture with respect to the seedling platform 10, the trajectory of the movement at the tip of the seedling dividing claw 9 is a closed loop. is only in the shape of a circle whose radius is the distance from the rotation axis 3 to the planting axis 7.

However, the second intermediate gear 13 and the interlocking gear 1
By configuring 4 as an eccentric gear as described above, the leftward rotation of the planting shaft 7 accompanying the rightward revolution of the rotating case 4 is achieved by the eccentric gears during one rotation. Due to the diameter difference between the rotating cases 13 and 14, the rotating case 4 rotates at a non-uniform speed, which is faster or slower than the rotation speed.

Therefore, as shown in FIG. 5, the timing when the rotational speed of the non-uniform rotation of the planting shaft 7 to the left with respect to the revolution of the rotation case 4 becomes slow is determined by the field scene 15 of the planting body 8, as shown in FIG. The period when the rotation speed of the non-uniform rotation of the planting shaft 7 to the left becomes faster corresponds to the period when the planting body 8 rises as it approaches the upper limit of its rise. With this setting, when each planting body 8 descends to approach the field scene 15, it rotates to the left later than the revolution of the rotation case 4, changes its posture downward, and approaches the upper limit of its ascent. At this time, the rotation case 4 moves further to the left than the revolution of the rotation case 4, rotates on its own axis, and changes its posture upward, resulting in a swinging motion, so the movement of the tip of the seedling dividing claw 9 of each planting body 8 The closed loop of the trajectory is the first
As shown by the two-dot chain line in the figure, the result is an elliptical closed loop curve 16 elongated in the vertical direction.

In addition, in the embodiment, the second intermediate gear 13 and the interlocking gear 14 that mesh with the second intermediate gear 13 are configured as eccentric gears, so that the second gear train of these gears 13 and 14 is unequal to the planting shaft 7. In this case, the second intermediate gear 13 and the interlocking gear 14 are configured as elliptical gears instead of being eccentric gears. Therefore, the second gear train of both gears 13 and 14 may be configured as a non-uniform gear train for transmitting non-uniform rotation to the planting shaft 7.

Further, the second intermediate gear 13 and the interlocking gear 14
By configuring the sun gear 5 and the first intermediate gear 12 meshing therewith as eccentric gears or elliptical gears instead of configuring them as eccentric gears or elliptical gears. , 12 may be constructed as a non-uniform gear train for transmitting non-uniform rotation to the planting shaft 7.

Furthermore, the number of planting bodies 8 is not limited to two as in the above embodiment, but may be arbitrarily divided into three or more pieces equally divided in the circumferential direction. The timing when the planting body 8 changes its posture upward can be arbitrarily adjusted and set by adjusting the rotational phase position of the sun gear 5 with respect to the transmission case 1. If the attachment base to the seedling dividing claw 9 and the part to which the seedling dividing claw 9 is attached or the tip of the seedling dividing claw 9 are shifted by an appropriate dimension S in the axial direction of the rotating shaft 3 in the plan view of FIG. By narrowing the distance between the planting shafts 7, 7 while avoiding collision interference between the tips of the seedlings 9 and the base of the planting body 8, it is possible to downsize the seedling planting device.

[Action/effect of the invention]

As described above, the present invention provides a rotary seedling planting device in which at least one of the two gear trains provided in the rotating case is configured as a non-uniform speed gear train. Each planting body equipped with a seedling dividing claw is oscillated so that the tip of the seedling dividing claw in each planting body draws a vertically long elliptical closed-loop movement locus, so that the above-mentioned conventional rotation is not possible. Compared to type seedling transplanters that use a crank mechanism to make swing movements,
Since the movement is smooth and rotational fluctuations are small, it is possible to stabilize the planting posture of seedlings in relation to the field, and it is also possible to significantly reduce vibrations and greatly improve durability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is an enlarged cross-sectional view of FIG. 1, and FIG. 4 is a cross-sectional view of FIG. 3. ,
FIG. 5 is a diagram showing the rotational state of the eccentric gear. 1... Transmission case, 3... Rotating shaft, 4... Rotating case, 5... Sun gear, 7... Planting shaft, 8...
... Planting body, 9 ... Seedling dividing claw, 11 ... Intermediate axis,
12...First intermediate gear, 13...Second intermediate shaft, 1
4... Interlocking gear, 16... Motion trajectory.

Claims (1)

[Claims] 1. A hollow rotating case with a non-rotating sun gear built in the center is attached to the rotating shaft that protrudes horizontally from the part of the machine near the seedling stand, and multiple plants are planted around the outer periphery of the rotating case. The shafts are supported parallel to the rotating shaft, and a planting body equipped with seedling dividing claws is placed on the protruding end of each planting shaft from the rotating case, with the seedling dividing claws facing toward the seedling stand. In the seedling planting device, an intermediate shaft is supported in the rotating case in parallel with the rotating shaft at a position approximately intermediate between each of the planting shafts and the rotating shaft. A first intermediate gear that meshes with the sun gear and a second intermediate gear that rotates integrally with the first intermediate gear are provided on the top, and the second intermediate gear is connected to the interlocking gear on each of the planting shafts. while the first gear of the sun gear and the first intermediate gear mesh with each other.
At least one of the gear train and the second gear train of the second intermediate gear and the interlocking gear is moved in an elliptical closed loop in which the tips of the seedling dividing claws in each of the planting rods are long in the vertical direction. A seedling planting device for a rice transplanter characterized by being configured as a non-uniform speed gear train so as to draw a trajectory.