JPH06253632A - Seedling planter for rice transplanter - Google Patents

Abstract

PURPOSE:To miniaturize and reduce the weight of a rotating case pivoted on a machine body in changing a motional locus at the tips of seedling diving pawls in each planting body attached to the rotating case into the shape of an elliptical closed loop long in the vertical directions with the first and second gear trains installed in the rotating case. CONSTITUTION:The second gear train of gears 13 and 14 is arranged in a part on the side opposite to a machine body on both the right and left sides of the first gear train of gears 5 and 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting device for splitting seedlings from a seedling mat on a seedling mounting table in a rice transplanter and then planting the seedlings in a field.

[0002]

2. Description of the Related Art Conventionally, a seedling planting apparatus of this type is disclosed in Japanese Patent Publication No. 49-27762.
While connecting the base end of the plant with a seedling dividing claw at the tip to the fuselage side via a fan link, the middle part of the plant is attached to the tip of the crank fixed to the claw shaft that is rotationally driven by the engine. By pivotally connecting and constructing the plant by the rotation of the crank so that the tip of the seedling dividing claw draws a closed loop trajectory, the seedling is not damaged when splitting it from the seedling mat and After the seedlings were planted on the seedlings, the seedling-splitting nails quickly escaped from the seedlings after planting to stabilize the seedlings' planting posture.

However, this plant has a problem that the planting body swings up and down, so that the planting plant vibrates greatly and the planting speed is slow. Therefore, in order to reduce the vibration and increase the planting speed, a so-called rotary seedling planting device in which a plurality of planting bodies provided with seedling dividing claws are attached to a rotating case is, for example, , Shokoku Sho49-
It is proposed in Japanese Patent No. 17806 and Japanese Patent Laid-Open No. 49-17807.

[0004]

However, in this rotary type seedling planting device, each planting body is swung so that the tip of the seedling dividing claw draws a locus of an elliptical closed loop whose vertical direction is long. A mechanism for
This swinging motion is configured to be performed by a crank mechanism. With this cranking mechanism, the movement is unsmooth and the speed fluctuation during swinging motion is large, so the posture of planting seedlings in a field scene is high. Is unstable, vibration cannot be sufficiently reduced, and there is a problem that durability is low.

The present invention is directed to solving the above-mentioned conventional problems in a rotary type seedling planting device, and another object thereof is to increase the size and weight of the rotating case. It is something that has been done so.

[0006]

To achieve this object, the present invention incorporates a non-rotating sun gear in the central portion of a rotary shaft that projects substantially horizontally from the portion of the machine body near the seedling mounting table. A hollow rotating case is attached, and a plurality of planting shafts are axially supported on the outer peripheral portion of the rotating case in parallel with the rotating shaft.
One end of each planting shaft penetrates a side plate opposite to the machine body of the left and right side surface plates of the rotating case to project in a direction opposite to the machine body, and the projecting end is provided with a seedling dividing claw. In the seedling planting device, wherein the seedling dividing claw is mounted with the seedling dividing claws facing toward the seedling mounting table side, in the rotating case, at a position approximately midway between each of the planting shafts and the rotating shaft, an intermediate portion is formed. A shaft is axially supported in parallel with the rotation shaft, and on each of the intermediate shafts, a first intermediate gear that meshes with the sun gear, and a second intermediate gear that rotates integrally with the first intermediate gear. The second intermediate gear is meshed with the interlocking gear on each of the planting shafts, while the first gear train of the sun gear and the first intermediate gear and the second intermediate gear and the interlocking gear are provided. At least one of the second gear trains is connected to each of the plant gears. Only constitutes a non-constant speed gear train so that the tip of the seedling split nail draws a moving path of the long oval closed loop in the vertical direction in the rod, further, the first gear train and the second
A configuration in which the second intermediate gear and the interlocking gear in the second gear train of the gear train are arranged on the left and right sides of the sun gear and the first intermediate gear in the first gear train on the opposite side to the machine body. I chose

[0007]

Embodiments of the present invention will now be described with reference to the drawings. In the drawings, reference numeral 1 indicates a transmission case in the body of a rice transplanter, and a boss body 2 horizontally projects laterally on the side surface of the transmission case 1. Into the boss body 2, a rotary shaft 3 which is rotationally driven by power transmission from an engine (not shown) mounted on the body of the rice transplanter is inserted, and the rotary shaft 3 from the boss body 2 is inserted. An oval-shaped and hollow rotating body case 4 is fitted to the projecting end, and the rotating case 4 is configured to rotate in the right direction of arrow A in a side view.

At the center of the rotating case 4,
A non-rotating sun gear 5, which is rotatably fitted to the boss body 2 and is rotatable with respect to the rotating case 4, is disposed. The sun gear 5 has an appropriate rotation phase with respect to the transmission case 1. It is non-rotatably locked by adjusting means (not shown). At both left and right ends of the rotating case 4, the supporting shaft 6 is rotatably supported by the rotating case 4 such that the supporting shaft 6 is parallel to the rotating shaft 3 at positions where the distance L from the rotating shaft 3 is equal. A hollow planting shaft 7 is rotatably fitted on the shaft 6, and one end of each planting shaft 7 is attached to a side plate 4a of the left and right side plates 4a, 4b of the rotating case 4 opposite to the transmission case 1. A planting body 8 having a seedling dividing claw 9 at the projecting end,
The seedling dividing claws 9 of the planting body 8 are attached at the base end portion 8a of the planting body 8 so that the seedling dividing claws 9 face the seedling placing table 10, while the rotary shaft 4 and the rotary shaft 3 are installed in the rotating case 4. At an intermediate position, an intermediate shaft 11 is rotatably supported in parallel with the rotary shaft 3 and the planting shaft 7, and the sun gear 5 is constantly meshed with the sun gear 5 on the intermediate shaft 11. The first intermediate gear 12 having the same number of teeth is fitted to the intermediate shaft 11 so that the intermediate shaft 11 rotates once per one rotation of the rotating case 4.

On the other hand, the second intermediate gear 13 having the same number of teeth as the first intermediate gear 12 is fitted on the intermediate shaft 11, while the second intermediate gear 13 having the same number of teeth as the first intermediate gear 12 is fitted on the intermediate shaft 11. 2 An interlocking gear 14 having the same number of teeth as that of the intermediate gear 13 and constantly meshing with the intermediate gear 13 is fitted so that the planting shaft 7 becomes the intermediate shaft 1.
It is configured to rotate once per one rotation. In this case, the second intermediate gear 13 and the interlocking gear 14 meshing with the second intermediate gear 13 are disposed on the left and right sides of the sun gear 5 and the first intermediate gear 12 on the side opposite to the transmission case 1. .

The second intermediate gear 13 and the interlocking gear 14 are eccentric with the centers (0) of these gears eccentric from the rotation centers of their respective shafts 11 and 7 by an appropriate dimension (e). It is configured as a gear. In this configuration, when the rotating case 4 revolves in the right direction of the arrow A by the rotating shaft 3, the first intermediate gear 12 meshing with the sun gear 5 that cannot rotate with respect to the transmission case 1 revolves around the rotating case 4. Along with this, the rotation angle of the revolution is the same as the rotation angle in the right direction of arrow B. In this first intermediate gear 12,
The planting shaft 7, which is interlocked via the second intermediate gear 13 and the interlocking gear 14, is rotated by the first intermediate gear 12 to rotate the arrow C.
Since it revolves in the left direction, that is, in the direction opposite to the revolving direction of the rotating case 4, the planting body 8 attached to this planting shaft 7 turns around the rotating shaft 3 with the seedling table 10 still facing. During this turning movement, when the side facing the seedling placing table 10 is lowered from top to bottom, the tip 9a of the seedling dividing claw 9 removes seedlings from the seedling mat on the seedling placing table 10. After splitting only the plant, it is planted in the field scene 15 in the vicinity of the lower limit of its descending, and thereafter rises above the field scene 15.

In this case, when the second intermediate gear 13 that rotates simultaneously with the first intermediate gear 12 and the interlocking gear 14 that meshes with the second intermediate gear 13 are not eccentric gears, the planting shaft 7 moves to the left of the arrow C. Since the rotation angle of rotation is the same as the rotation angle of the revolution of the rotating case 4 in the right direction of the arrow A, the planting body 8 with the seedling dividing claw 9 attached to the planting shaft 7 is attached.
Is rotated in the opposite direction to the direction of revolution of the rotating case 4 by a delayed rotation by the same rotation angle, so that each planting body 8 faces the seedling table 10, and
Since the swivel motion is performed while maintaining a fixed posture with respect to the seedling mounting table 10, the closed loop of the motion locus at the tip 9a of the seedling dividing claw 9 has a radius from the rotation axis 3 to the planting axis 7. It only makes a circle.

However, since the second intermediate gear 13 and the interlocking gear 14 are formed as eccentric gears as described above, the planting shaft 7 rotates leftward as the rotating case 4 revolves rightward. During the one rotation, the eccentric type gears 13 and 14 are rotated at a non-constant speed, which is faster or slower than the rotation speed of the rotating case 4 due to the diameter difference between the gears 13 and 14.

Therefore, as shown in FIG. 5, when the rotation speed of the non-uniform rotation of the planting shaft 7 to the left with respect to the revolution of the rotating case 4 slows down, the planting scene of the planting body 8 is shown. The time when the rotation speed becomes faster among the non-constant rotation of the planting shaft 7 to the left, the time when the planting shaft 7 descends so as to approach 15 and the time when the planting shaft 7 rises so as to approach the ascent limit of the planting body 8 respectively. By setting so that each planting body 8 descends so as to approach the field scene 15, it delays to the left of the revolution of the rotating case 4 to the left and rotates its posture downwards to the upper limit. When approaching, it moves to the left more than the revolution of the rotating case 4 and freely swings around to rotate its posture so as to change its posture upward.
The closed loop of the locus of movement of the tip 9a of the seedling dividing claw 9 is a closed loop curve 16 which is elongated in the vertical direction and is elongated as shown by the chain double-dashed line in FIG.

In the above embodiment, the second intermediate gear 1 is used.
3 and the interlocking gear 14 meshing with the gear 3 are eccentric gears, so that the gear trains of both gears 13 and 14 are configured as a non-constant speed gear train for transmitting non-constant speed rotation to the planting shaft 7. However, instead of using the eccentric gears as the second intermediate gears 13 and the interlocking gears 14, the gear trains of both gears 13 and 14 are planted with the elliptical gears. It is also possible to configure a non-constant speed gear train for transmitting non-constant speed rotation to 7.

Further, instead of forming the second intermediate gear 13 and the interlocking gear 14 as eccentric gears or elliptical gears, the sun gear 5 and the first intermediate gear 1 meshing with the sun gear 5 are formed.
By configuring 2 as an eccentric gear or an elliptical gear,
The gear train of both gears 5 and 12 may be configured as a non-constant speed gear train for transmitting non-constant speed rotation to the planting shaft 7.

Furthermore, the number of the planting bodies 8 is not limited to the two in the above-mentioned embodiment, and it is also possible to arbitrarily make a plurality of three or more plants in the circumferential direction, and the planting bodies 8 are directed to the field scene 15. The timing at which the posture of the planting body 8 is changed upward when descending can be arbitrarily set by adjusting the rotational phase position of the sun gear 5 with respect to the transmission case 1. Further, as shown in FIG. 1 or 5, the attachment base end portion 8a of the planting body 8 to the planting shaft 7 is appropriately arranged in the direction of the rotating case 4 rather than the tip 9a of the seedling dividing claw as shown in FIG. If it is configured to be displaced by the dimension (S), the tip 9a of the seedling dividing claw can be prevented from colliding with the base end 8a of the planting body 8, and the distance L from the rotary shaft 3 to the planting shaft 7 can be reduced. Since the length can be shortened, the rotating case 4 can be downsized.

[0017]

As described above, according to the present invention, in the rotary type seedling planting apparatus, at least one of the two gear trains provided in the rotating case is replaced with a non-constant speed gear train. By configuring, each planted body with a seedling split nail is to swing so that the tip of the seedling split nail in each planted body draws a locus of an elliptical closed loop that is long in the vertical direction. Since the movement is smoother and the rotation fluctuation is smaller than that of the conventional rotary type seedling planting apparatus that swings by a crank mechanism,
In addition to being able to stabilize the posture of planting the seedlings in the field, it is possible to greatly reduce vibration and also to greatly improve durability.

By the way, when the first gear train and the second gear train are provided in the rotating case, the second intermediate gear and the interlocking gear in the second gear train are replaced by the sun gear and the first intermediate gear in the first gear train. If the second intermediate gear interferes with the support portion of the sun gear and the like on both sides of the gear on the side of the machine body, the second intermediate gear interferes with the support of the sun gear and so on, so that the distance from the rotating shaft to the intermediate shaft is large, and In addition to having to increase the distance from the intermediate axis to the planting axis,
Since the length of the planting shaft becomes long, the thickness dimension of the rotating case must be increased, and therefore, the rotating case becomes large in size and heavy in weight.

On the other hand, according to the present invention, the second intermediate gear and the interlocking gear in the second gear train are arranged on the left and right sides of the sun gear and the first intermediate gear in the first gear train on the side opposite to the machine body. With this arrangement, it is possible to avoid the second intermediate gear from interfering with the support portion of the sun gear, etc., so that the distance from the rotary shaft to the intermediate shaft is reduced by this amount, and by extension, from the intermediate shaft. Since the distance to the planting shaft can be made small and the length of the planting shaft can be shortened in addition to this, the thickness dimension of the rotating case can be made small, so that the rotating case can be made compact and lightweight.

[Brief description of drawings]

FIG. 1 is a front view of a seedling planting device according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a diagram showing a rotating state of an eccentric gear mechanism.

[Explanation of symbols]

 1 transmission case 3 rotating shaft 4 rotating case 5 sun gear 7 planting shaft 8 planting body 9 seedling dividing claw 9a tip of seedling dividing claw 11 intermediate shaft 12 first intermediate gear 13 second intermediate shaft 14 interlocking gear 16 movement trajectory

Claims (1)

[Claims] 1. A hollow rotary case having a non-rotating sun gear built in at the center is attached to a rotary shaft which projects from the vicinity of the seedling mounting table of the machine body in a substantially horizontal direction, and the outer peripheral portion of the rotary case is attached. A plurality of planting shafts are rotatably supported in parallel with the rotary shaft, and one end of each planting shaft is penetrated through a side plate opposite to the machine body of the left and right side plates of the rotary case to face the machine body. In the direction of, in the projecting end, a planting body provided with a seedling dividing claw, the seedling dividing claw mounted in a posture toward the seedling mounting table side, in the rotating case, A first intermediate gear that meshes with the sun gear on each of the intermediate shafts, the intermediate shaft being axially supported in parallel with the rotary shaft at a position approximately midway between each of the planting shafts and the rotary shafts. , A second intermediate gear that rotates integrally with the first intermediate gear is provided. An intermediate gear, while in mesh with interlocking gear in each planting shaft, wherein said sun gear first
At least one of the first gear train with the intermediate gear and the second gear train with the second intermediate gear and the interlocking gear is provided with a tip of the seedling dividing claws in each planting rod in the vertical direction. The non-uniform velocity gear train is configured to draw a long elliptical closed loop motion locus, and further, the second intermediate gear and the interlocking gear in the second gear train of the first gear train and the second gear train are A seedling planting device for a rice transplanter, wherein the sun gear and the first intermediate gear in the first gear train are arranged on the left and right sides opposite to the body.