JPH1098924A - Seedling planting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the planting mark of a field surface by a seedling planter small, to provide desired entire angular velocity change without using a non- circular gear for a gear constituted inside a rotary case and to facilitate the manufacture of the gear. SOLUTION: For this seedling planting device, the seedling planter 33 is turnably provided in the rotary case 32 driven and rotated by being supported by a machine body, a sun gear 34 fixed inside the rotary case 32 so as not to be rotated to the machine body, a first intermediate gear 35 engaged with the sun gear, a second intermediate gear 37 integrally rotated around an intermediate shaft 36 with the first intermediate gear 35 and a final gear 38 engaged with the second intermediate gear 37 are provided and the seedling planter 33 is integrally rotated with the final gear 38. In this case, first angular velocity change for which the turning angular velocity of the first intermediate gear 35 is changed to the turning angular velocity of the rotary case 32 and second angular velocity change for which the turning angular velocity of the final gear 38 is changed to the turning angular velocity of the second intermediate gear 37 are provided so as to be different.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling planting apparatus in which a seedling plant attached to a rotating case draws a loop trajectory to plant seedlings.

[0002]

2. Description of the Related Art Conventionally, there is a seedling planting device such as a rice planting machine provided with a seedling planting tool at an end of a rotating case driven and rotated. In the seedling planting apparatus, by reducing the amount of drag of the seedling planting tool into the soil to reduce planting traces in the field scene,
It is necessary to prevent the planted seedlings from falling or floating. For this purpose, it has been considered to make the operation trajectory of the tip of the seedling planting tool, that is, the planting trajectory, a long loop trajectory in the vertical direction.

[0003] In the rotating case, a sun gear fixed so as not to rotate with respect to the body, an intermediate gear meshing with the sun gear, and a seedling attaching tool meshing with the intermediate gear are finally rotated together with the seedling planting tool. And a non-circular gear is used for the sun gear, the intermediate gear, and the final gear, and the final gear, that is, the rotational angular velocity of the seedling tool is changed with respect to the rotational angular velocity of the rotating case. In some cases, the planting locus is elongated in the vertical direction.

Further, as disclosed in Japanese Patent Application Laid-Open No. 1-265808, a sun gear fixed so as not to rotate with respect to the body in a rotating case, a first intermediate gear meshing with the sun gear, and the first gear Seedling planting device provided with an intermediate gear, a second intermediate gear that rotates integrally around the intermediate shaft, and a final gear that meshes with the second intermediate gear, and a seedling planting tool provided so as to rotate integrally with the final gear. Wherein the rotation angular velocity of the first intermediate gear changes with respect to the rotation angular velocity of the rotary case, and the final gear rotation angular velocity changes with respect to the rotation angular velocity of the second intermediate gear. The configuration of a seedling planting apparatus using a non-circular gear for the sun gear, the first intermediate gear, the second intermediate gear, and the final gear is disclosed so that the second angular velocity change that changes with the second gear is substantially the same. Have been. With this configuration, the forward movement speed of the aircraft near the bottom dead center of the planting locus at which the seedling intrusion enters the soil and the backward movement speed of the tip of the seedling inoculation with respect to the aircraft are substantially equal. Fast
By reducing the amount of drag in the soil and the size of the planting trace in the field, the planted seedlings are prevented from falling or floating.

[0005]

However, the former configuration of the prior art described above is a non-circular type in which the three gears of the sun gear, the intermediate gear and the final gear are meshed sequentially. Even if a gear is used, there is a limit to the change in the rotational angular velocity of the final gear with respect to the rotational angular velocity of the rotating case, and therefore, there is also a limit in reducing the amount of the seedling plant dragging in the soil. There was a limit in reducing the planting trace in the field scene with the seedling planter.

In the latter configuration, since the first angular velocity change and the second angular velocity change are substantially the same, non-circular gears are provided for the sun gear, the first intermediate gear, the second intermediate gear, and the final gear. Without the use, it becomes impossible to make the forward movement speed of the body near the bottom dead center of the planting locus and the rearward movement speed of the tip of the seedling inoculation tool with respect to the body substantially constant, and It takes labor to manufacture gears.

[0007]

The present invention takes the following technical means to solve the above-mentioned problems. That is, the seedling attachment 3 is placed on the rotating case 32 which is supported by the body and driven and rotated.
A sun gear 34 fixed rotatably with respect to the body in the rotating case, and first intermediate gears 35 and 3 meshing with the sun gear 34 are provided rotatably.
5, the first intermediate gears 35, 35, second intermediate gears 37, 37 integrally rotating around the intermediate shafts 36, 36, and final gears 38, 38 meshing with the second intermediate gears 37, 37 are provided. The seedling attachments 33, 33 are connected to the final gears 38, 38.
In the seedling planting device provided to rotate integrally with the
The first angular speed change A in which the rotational angular speed of the first intermediate gears 35, 35 changes with respect to the rotational angular speed of the rotary case 32, and the rotational angular speed of the final gears 38, 38 are the second intermediate gear. The seedling planting device is characterized in that the second angular speed change B that changes with respect to the rotation angular speeds of the 37 and 37 is provided differently.

[0008]

According to the present invention, there is provided a seedling plant in which the first intermediate gear is fixed so as not to rotate with respect to the fuselage with the rotation of the rotating case supported by the fuselage. By rotating the first intermediate gear, the rotation angular velocity of the first intermediate gear is changed with respect to the rotation angular velocity of the rotating case (first angular velocity change). Then, the final gear is rotated from the second intermediate gear that rotates integrally with the first intermediate gear, and the rotational angular velocity of the final gear is changed with respect to the rotational angular velocity of the second intermediate gear (second angular velocity change). . Therefore, the seedling-planting tool, which rotates integrally with the final gear, plants the seedling in the field while rotating with respect to the rotating case. The seedling attachment changes the rotation angular velocity with respect to the rotation angular velocity of the rotating case by an overall angular velocity change which is a sum of the first angular velocity change and the second angular velocity change. The change and the second angular velocity change are transmitted in different states.

[0009]

According to the present invention, since the first angular velocity change and the second angular velocity change are different from each other, the irregular overall angular velocity change can be obtained. In addition to being able to reduce the size, the desired change in the overall angular velocity can be obtained without using a non-circular gear as the gear formed in the rotating case, and the manufacture of the gear is facilitated.

[0010]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a riding type rice transplanter 1 as an example of a seedling transplanter.
And a seedling planting section 3 of 6-row planting. Traveling car body 2
An engine 6, which is a driving source, is provided substantially at the center of the vehicle. The driving of the engine 6 drives the front wheels 4, 4 and the rear wheels 5, 5 via a traveling transmission case 7 and the like. 4, 5, 5 are driven, and the traveling vehicle body 2 travels. A cockpit 8 is provided above the engine 6.
A steering handle 9 is provided on the front side of the vehicle. An elevating link mechanism 10 is provided at a rear portion of the traveling vehicle body 2,
The seedling mounting part 3 is mounted via the lifting link mechanism 10, and is provided so as to be moved up and down by expansion and contraction of a hydraulic lifting cylinder 11. The power from the traveling vehicle body is transmitted to the seedling planting section 3 via the planting clutch case 12.

A stepped shift transmission lever 13 is provided in the step portion on the front side of the cockpit so that the operating speed of the seedling planting section 3 with respect to the traveling speed of the traveling vehicle body 2 can be shifted. ing. The inter-plant shift lever 13 allows the planting worker to set the interval between planted plants of seedlings to be transplanted to the field. Therefore, the inter-stock shift lever-1
As long as 3 is not operated, the seedling planting section 3 is operated at a speed proportional to the running speed.

The seedling planting section 3 is provided with a seedling mounting table 20, a planting transmission section 21, and a seedling planting device 22 for each row. A center float 23 and side floats 24, 24 on both sides are provided at the lower part of the seedling planting section 3.
The floats 23, 24, 24 are configured to slide on a field scene. The seedling planting unit 3 operates the seedling planting device 22 by the power from the planting transmission unit 21. The seedling mounting table 2
Reference numeral 0 denotes a seedling table support roller 26,..., And a lower part supported by a left-right moving guide plate 27 so as to be movable left and right. Therefore, the seedling mounting part 3 moves the seedling mounting table left and right moving rod 25 to which the seedling mounting table 20 is fixed to the right and left to move the seedling mounting table 20.
Is moved left and right, and a mat-shaped seedling is scraped off by the seedling planting device 22 one by one. The right and left moving guide plate 27 is provided with seedling scraping openings 27a for the seedling planting devices 22,. In addition, the seedling mounting table 20
Is a known configuration in which mat-shaped seedlings are sequentially transferred to the seedling planting device side along the seedling mounting table 20 by the seedling feeding belts 28,.

As shown in FIG. 3 and FIG.
Is a rotary casing that is driven from the seedling plant drive shaft 31 that is output from the end of the planting transmission frame 29 of the planting transmission section 21 and that rotates at a constant speed in proportion to the running speed of the body. And a seedling attachment 33, 33 attached to each end of the rotating case 32. The seedling attachments 33, 33 scrape the seedlings on the seedling scraping opening. The picked and scraped seedlings are planted in the field.
That is, the rotating case 32 is connected to the seedling plant drive shaft 3.
1, and a claw portion 34a of a sun gear 34 in a rotating case meshes with a sun gear fixing claw 29a fixed to the planting transmission frame 29 to rotate the sun gear 34. The first intermediate gear 35, which engages with the sun gear 34 by the rotation of the rotating case 32,
35 around the sun gear, the first intermediate gear 3
By driving the second intermediate gears 37, 37 integrally rotating about the intermediate shafts 36, 36 of the rotary case 32 with the last gears 35, 35, the final gears 38, 38 meshing with the second intermediate gears 37, 37 are rotated, The seedling attachments 33, 33 are integrally rotated by final gear rotation shafts 39, 39 which rotate integrally with the final gears 38, 38, and the seedling attachments are rotated with respect to the rotation position of the rotating case 32. The front and rear postures of 33, 33 are determined. The square shaft portion 39a of the final gear rotation shaft 39 is fitted into the square hole 33b of the seedling mounting case 33a of the seedling mounting device 33,
The seedling attachment 33 rotates integrally with the final gear 38. The first intermediate gears 35, 35, the intermediate shafts 36, 36, the second intermediate gears 37, 37, and the final gears 38, 38 are provided at symmetrical positions with respect to the sun gear 34, and the respective seedlings are provided. The front and rear postures of the implants 33 are determined.

The sun gear 34 and the first intermediate gears 35, 35 have the same number of teeth, and the first intermediate gears 35, 35 make one rotation per rotation of the rotating case 32. Similarly, the second intermediate gears 37, 37 and the final gears 38,
38 are the same number of teeth, and the final gear 3 per one rotation of the second intermediate gears 37, 37, ie, the first intermediate gears 35, 35.
8, 38 makes one rotation. Therefore, while the rotating case 32 makes one rotation, the seedling attachments 33, 33 make one rotation in the direction opposite to the rotation of the rotating case 32.

The seedling attaching tool 33 includes a separating claw 40 for scraping and separating a seedling on a mat by one strain, and a seedling extruding fork 41 for extruding the seedling separated by the separating claw 40 toward a field scene.
And is provided. The rotation of the rotating case 32 causes the seedling attachment 33 to draw a loop trajectory and pass through the seedling scraping opening 27a, so that the separation claw 40 scrapes and holds the seedling at the seedling scraping opening 27a. It is supposed to. The seedling pushing fork 41 is urged by a seedling pushing spring 42 toward the seedling pushing action side, and is rotated around a swing shaft 44 a by the rotation of a seedling pushing cam 43 which rotates with respect to the seedling attaching tool 33. The swinging seedling pushing arm 44 swings and engages with the tip of the arm, and slides and pushes against the seedling placement case 33a. still,
The seedling pushing cam 43 has a square shaft portion 43a that fits into the square hole 32a of the rotating case 32.
The seedling pushing cam 43 makes one rotation with respect to the seedling attachment 33 per rotation of the rotating case 32.

By the way, the sun gear 3 in the rotating case
4 and the first intermediate gear 35 are elliptical gears having the same shape, and the rotational angular velocity of the first intermediate gear 35 changes with respect to the rotational angular velocity of the rotating case 32 (hereinafter, the first angular velocity change A).
That. ). This first angular velocity change A appears in two cycles for one rotation of the rotating case 32, and the first intermediate gear 3
The rotation angular velocity of 5 is determined by the rotation position of the rotation case 32. Further, the second intermediate gear 37 and the final gear 3
Reference numeral 8 denotes an elliptical eccentric gear having the same shape, in which the rotation angular velocity of the final gear 38 changes with respect to the rotation angular velocity of the second intermediate gear 37 (hereinafter, referred to as a second angular velocity change B). This second angular velocity change B appears for one cycle per one rotation of the rotating case 32, and the rotation angular velocity of the final gear 38 becomes the second intermediate gear 37.
, That is, the rotational position of the rotating case 32. Therefore, as shown in FIG. 6, the first angular velocity change A and the second angular velocity change B are different.

As described above, as shown in FIG. 6, the change in the angular velocity of the seedling attachment 33 in the front-rear direction is represented by the total angular velocity change C, which is the sum of the first angular velocity change A and the second angular velocity change B.
Becomes The total angular velocity change C appears for one cycle per rotation of the rotating case 32. This overall angular velocity change C is irregular even though the sun gear 34, the first intermediate gear 35, the second intermediate gear 37, and the final gear 38 are formed into elliptical gears. It is possible to make the running speed of the body near the bottom dead center t of the planting trajectory T, that is, the planting trajectory T, and the backward moving speed of the tip of the seedling planting tool with respect to the body substantially constant. It is possible to make the vicinity of the bottom dead center t of the trajectory T nearly symmetrical in a side view, so that the amount of the seedling planting tool 33 dragging back and forth in the front-rear direction is reduced, and And prevent the planted seedlings from falling over or becoming floating seedlings. In addition, the gears for changing the posture of the seedling attachment 33 are all elliptical gears, so that the first angular velocity change A and the second angular velocity change B, that is, the angular velocity change of the gear transmission section are relatively smooth. And these gears 34, 35, 3
The manufacture of 7, 38 is easy.

Even if non-circular gears are used for the sun gear 34, the first intermediate gear 35, the second intermediate gear 37, and the final gear 38, the traveling speed of the airframe near the bottom dead center of the planting locus. It is possible to make the rearward movement speed of the tip of the seedling attaching tool with respect to the body substantially constant. Further, as shown in FIG. 8, the sun gear 34 and the second intermediate gear 37, and the first intermediate gear 35 and the final gear 38 in the rotating case shown in FIG. 8 is because the first angular velocity change A and the second angular velocity change B shown in FIG. 4 are interchanged, and the total angular velocity change C which is the sum of them is the same.

Therefore, as shown in FIG.
Is the minimum radius 37r of the second intermediate gear 37.
By setting the arrangement of the gears in the rotating case so as to be larger, the strength of the sun gear 34 having the drive shaft 31 of the seedling planting device having a larger diameter than the rotating shaft of the other gears as the rotating shaft. Can be kept. As shown in FIG. 8, the arrangement of the gears in the rotating case is set so that the maximum radius 38R of the final gear 38 'is smaller than the maximum radius 35R of the first intermediate gear 35'. The length of the seed case planting device 22 can be increased while suppressing the interference between the rotating case 32 and the field scene.

Although the above embodiment has been described with reference to a riding type rice transplanter, the present invention is not limited to a riding type rice transplanter. Similarly, although the above embodiment describes a six-row plantation configuration, the present invention is not limited to a six-row plantation configuration.

[Brief description of the drawings]

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

FIG. 2 is a plan view of a riding type rice transplanter.

FIG. 3 is a plan sectional view of the seedling planting apparatus.

FIG. 4 is a side sectional view of a rotating case.

FIG. 5 is a side sectional view of a seedling attachment.

FIG. 6 is a diagram showing a change in angular velocity.

FIG. 7 is a diagram showing a planting locus (a) a static locus (b) a dynamic locus

FIG. 8 is a side sectional view of a rotating case of another embodiment.

[Explanation of symbols]

29: Planting transmission frame, 32: Rotating case, 33, 3
3 ... seedling planting tool, 34 ... sun gear, 35, 35 ... first intermediate gear, 36, 36 ... intermediate shaft, 37, 37 ... second intermediate gear, 38, 38 ... final gear, A ... first angular velocity change , B ...
Second angular velocity change

Claims (1)

[Claims] 1. A seedling planting tool 33, 33 is rotatably provided on a rotating case 32 supported by the body and driven to rotate.
A sun gear 34 fixed so as not to rotate with respect to the body in the rotating case, first intermediate gears 35 and 35 meshing with the sun gear 34, the first intermediate gears 35 and 35, and intermediate shafts 36 and 36. Second intermediate gear 3 that rotates integrally around
And a final gear 38 meshing with the second intermediate gears 37, 37, and a seedling plant provided such that the seedling attachments 33, 33 rotate integrally with the final gears 38, 38. In the attachment device, the first angular speed change A in which the rotation angular speed of the first intermediate gears 35, 35 changes with respect to the rotation angular speed of the rotary case 32, and the rotation angular speed of the final gears 38, 38 are the same. A seedling planting apparatus characterized in that a second angular speed change B that changes with respect to the rotational angular speed of the second intermediate gears 37, 37 is provided differently.