JP2588879B2 - Seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a seedling planting device.
The present invention relates to a seedling planting apparatus in which planting claws of a transplant tool draw a loop-shaped planting trajectory that is long in a vertical direction and plant seedlings in a field.

(Prior art)

As this type of prior art, as is apparent from Japanese Patent Application Laid-Open No. 61-5711, the outer peripheral side of the rotating case is rotated at the same rotational speed in the opposite direction to the rotating direction of the rotating case, and
The implant mounting shaft which is transmitted by the sun eccentric circular gear (or sun elliptical gear) and the planet eccentric circular gear (or planetary elliptical gear) in the rotating case so as to fluctuate its rotational bundle is projected. There is a seedling planting device in which a transplanting tool is attached to a shaft, and a planting claw of the transplanting tool draws a long planting locus in a vertical direction in a side view.

[Problems of the prior art]

However, in the conventional seedling planting apparatus, the sun eccentric circular gear and the planetary eccentric circular gear in the rotary case merely use the perfect circular gear eccentrically from its center to provide a rotation center, Inevitably, the meshing depth of these gears fluctuates greatly during their rotation, forcing them to rotate, causing large play and errors in their transmission, and high-speed rotation during seedling planting work. The mechanism was unsuitable, and the timing of planting seedlings in the field and the timing of taking out seedlings from the seedling mounting table fluctuated, making it impossible to plant seedlings accurately.

Further, in order to configure a transmission mechanism in which the rotational speed fluctuates with a line-symmetric gear such as the above-mentioned circular gear having a center or an elliptical gear having a focus, it is necessary to largely decenter the rotation center from the center and the focus. This is not possible because the play and error in the above transmission increase. Therefore, the planting claw of the planting claw can be formed only in a restricted shape, and it is difficult to draw an optimal trajectory on the theory of seedling planting action. The arc-shaped trajectory drawn below becomes wider, and during seedling planting work, if the signal speed of the aircraft is added, the planting claws will be considerably towed from entering the soil surface to falling out of the soil surface, Therefore, not only does the planting hole formed at the time of planting become large and the seedlings after planting do not take root well, but also in the rice fields where water is deep, the planted seedlings rise and cannot be planted properly. Therefore, a seedling planting device with high seedling planting accuracy cannot be obtained.

[Technical means for solving the problem]

The present invention solves the above-mentioned problem of the prior art by fixing a rotating case 29, which houses a gear transmission mechanism provided so that a planetary gear 33 rotates around a sun gear 31, to a drive shaft. A transplant tool 36 having a planting claw 39 is fixed to a transplant tool mounting shaft 34 that rotates integrally with the planetary gear 33, and the tip of the planting claw 39 forms a loop-like trajectory with the rotation of the rotating case 29. In the seedling planting apparatus which operates so as to take out one seedling per plant from the seedlings placed on the seedling mounting table 20 by turning and drawing P, the sun gear 31 and the planetary gear are operated.
In order to shorten the distance L in which the implantation claw 39 of the implant 36 moves in the soil at the time of planting, the angular speed of the implantation tool mounting shaft 34 is such that the implantation claw 39 protrudes below the soil surface. The present invention is directed to a seedling planting apparatus characterized in that the seedling plant is constituted by non-linear gears which are not line-symmetric and have continuous teeth in which the angular velocity of the transplant tool mounting shaft 34 fluctuates so that the speed is increased when the gears are fastened.

[Function and effect of the invention]

According to the present invention, the gear transmission mechanism of the sun gear 31 and the planetary gear 33 has an arrangement in which the angular velocity of the implant mounting shaft 34 is adjusted so as to reduce the distance L in which the implant claw 39 of the implant 36 moves in the soil during implantation. Nail 39
Since it is composed of non-circular gears that are not linearly symmetrical and consist of continuous teeth in which the angular velocity of the implant mounting shaft 34 fluctuates so that the gears become faster when protruding below the soil surface, During the rotation, the meshing depth fluctuates greatly and it is possible to prevent excessive rotation and excessive transmission play and error from occurring in the gear transmission, and even when rotating at high speed during seedling planting work,
There is little variation in the timing of planting seedlings in the field and the timing of taking out seedlings from the seedling mounting table 20, so that good seedlings can be planted. Furthermore, the distance L over which the planting claws 39 move on the soil surface during planting is short. Even if the transmission mechanism is configured such that the angular velocity of the implant mounting shaft 34 fluctuates, a gear transmission mechanism that does not increase transmission play or error can be obtained, and is therefore optimal in theory of seedling planting action. Can be drawn, and the planting holes formed by the planting claws 39 on the soil surface during planting are smaller than those of the conventional device, so that the planting posture is stable and In addition, the number of floating seedlings can be reduced even in a paddy field where water is deep, and a seedling planting device with high seeding planting accuracy that can appropriately solve the problems of the conventional example can be obtained.

〔Example〕

A riding type seedling transplanter according to an embodiment of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes a passenger towing vehicle, which is provided with a front transmission case 3 and a rear transmission case 4 below a flat steering step floor 2, and a front axle case on both left and right sides of a rear side of the front transmission case 3. A pair of left and right front wheels 5,5 are provided for transmission rotation, and transmission cases 6,6 are mounted on both left and right sides of a rear transmission case 4, and rear wheels 7,7 are provided. A handle 8 is provided upright on a frame body 8 on which a steering post is mounted. A cover 11 for covering an engine 10 is provided behind the handle 9, and a control seat 12 is mounted thereon.

Reference numerals 13 and 13 denote support columns, which are erected on the rear transmission case 4 on the left and right at predetermined intervals.

14 is a lifting link, the base side of a pair of left and right lower links 15a, 15a and a single upper link 15b is pivotally connected to the columns 13, 13 via pins, and the tip side is connected by a vertical link 16, The lifting link 14 is configured to be vertically turned by a hydraulic cylinder device 17.

Numeral 18 is a seedling planting machine, which is composed of a transmission case 19, a seedling mounting table 20 reciprocating left and right, a seedling planting device 21, and grading floats 22, 23, 23 at the center and sides, and the like. The right and left intermediate portions of 19 are freely rotatably mounted on a support 24 integral with the vertical link 16 via a support shaft 25. The transmission case 19 has a configuration in which the front ends of the sub transmission cases 19b, 19b are attached to the back of the main transmission case 19a and extended rearward.

Numeral 26 denotes a seedling receiving frame, which extends laterally along the lower end of the seedling mounting table 20, and into which seedlings placed in the seedling mounting table 20 can be split. ... is provided.

The seedling planting apparatus 21 includes the following members. That is, a drive shaft 28 protruding outward and laterally is provided on the vertical transmission case 19b so as to be driven and rotated by a transmission mechanism described later, and the distal end side of the drive shaft 28 is provided in a square shape. The rotating case 29 is attached to the drive shaft. The mounting of the rotating case 29 is configured such that the tip end side angular shaft portion 28a of the drive shaft 28 is fitted and the rotating case 29 is integrally rotated with the drive shaft 28. 30 is fixed metal,
The base is fastened to the transmission case 19b by bolts 30b, and the tip end extends into the rotating case 29 so as to surround the drive shaft 28. An engaging portion (claw) 30c is provided on the distal end side of the fixed metal 30. Reference numeral 31 denotes a non-circular sun gear. The boss of the gear 31 is externally fitted to the drive shaft 28, and an engagement portion (claw) 31a is provided on one side thereof. The engagement portion 30c of the fixed metal 30 is engaged so that the sun gear 31 does not rotate and fits in the rotating case 29. The pitch circle 31p of the sun gear 31 is not a perfect circle but a non-circular non-circular line composed of continuous teeth.

Reference numerals 32, 32 denote non-circular planetary intermediate gears which mesh with the sun gear 31 and are rotated with the rotation of the rotating case 29. As a matter of course, the pitch circle 32p of this gear is also non-circular.

Reference numeral 33 denotes a non-circular planetary gear, which is supported inside the tip side of the rotating case 29, meshes with the gear 32, and projects the shaft of the gear outwardly of the rotating case 29 to thereby attach a transplantation tool mounting shaft 34.
Is composed. Naturally, the pitch circle 33p of the gear 33 is not a perfect circle but a non-circle.

The implant mounting shaft 34 rotates in the reverse direction to the rotation direction of the rotating case 29, and the number of rotations is configured to be the same as that of the rotating case 29, and the non-circular gears 31, 32, 33 It is configured such that the angular velocity during one rotation changes by transmission. This variation in the angular velocity is caused by the fact that the planting claw 39 swings backward at a portion where the planting claw 39 provided on the transplanting tool 36 of the seedling planting device 21 rushes below the soil surface and is planted. The amount has been reduced. That is, the variation in the angular velocity of the implant mounting shaft 34 is set so that the distance L in which the planting claws 39 move on the soil surface at the time of planting becomes very short, and is therefore formed at the time of planting. The planting hole can be made smaller.

Reference numeral 35 denotes a cam mounting cylinder shaft, which is provided so as to cover the implanting device mounting shaft 34, and has a base end side fixed to the rotating case 29 so as to rotate integrally with the rotating case 29.

Numeral 36 denotes an implanting tool. The implanting instrument mounting shaft 34 penetrates through the hollow case of the implanting instrument 36, and the implanting instrument case is fixed to the distal end side of the implanting instrument via a metal 37 serving also as a cover. A shaft 35 extends into the hollow of the implant 36, and the shaft 35 has a cam body 38 of which a part of the outer periphery has a spiral shape attached.

Numeral 39 denotes an implant nail, which is fixed downward to the front end side of the implant case, and formed into a pair of left and right needle-like nails in the illustrated example. Numeral 40 denotes a seedling extruding nail, which is provided with an elevating shaft 41 which enters and exits at the lower part on the front end side of the transplant device case, and is fixed to the lower end of this protruding portion. The upper end of the elevating shaft 41 is elasticized by a spring 42 in the transplant device case. It is provided to be lowered.

The cam body 38 and the elevating shaft 41 are linked by a lever 43. Reference numeral 44 denotes a pivot pin of the lever 43.

Next, the power transmission between the seedling mounting table 20 and the drive shaft 28 will be described. The transmission in the transmission transmission case 46 extends from the output shaft 45 protruding and extending to the rear of the front transmission case 3 of the passenger towing vehicle 1. The transmission shaft 47 is projected backward through the transmission shaft 47, and an intermediate transmission shaft 48 having a universal joint is driven from the transmission shaft 47, and the transmission shaft 48
An input shaft 49 which drives various transmission shafts in the transmission case 19 and receives power from the transmission shaft 48 is provided so as to protrude into the transmission case 19 from the front. The input shaft 49 drives a first shaft 50 horizontally disposed in the transmission case 19 by a pair of bevel bevel gears 51 and 52. From the first shaft 50, the drive shaft 28 is connected to a sprocket 53 and a chain. The second shaft 56, which is transmitted via the sprocket 55, is transmitted via the peripheral speed changing transmission mechanism A. As an embodiment of the peripheral speed changing transmission mechanism A, a pair of eccentric gears 57 and 58 are used in the present embodiment.

The transmission in the rotating case 29 is as shown in the meshing state of the non-circular gears shown in FIG. 6, and FIG. 6 simultaneously shows a related drawing corresponding to the operating position of the implant 36.

That is, as shown in FIG.
As the gear 39 in the rotating case 29 engages with the implant mounting shaft as shown in the figure while 39 protrudes into the soil surface and then escapes from the soil surface,
If the rotation angular velocity of 34 becomes faster and the implant 36 is not rotated by the rotation case 29, it operates so as to be swung upwards and upwards. As shown in FIG. 6A, the rotational angular velocity of the implant mounting shaft 34 gradually decreases, and then the seedlings 20 are divided from the seedling mounting table 20 through the state shown in FIG. 6C. ing.

In the state shown in FIG. 6A, the eccentric gears 57 and 58 are engaged with each other as shown in FIG. 7, and the rotating case 29 is rotating at a low speed.

The transmission from the first shaft 50 to the lead cam shaft 59 for reciprocating the seedling mounting table 20 right and left is performed by selectively engaging the two sets of transmission gears 60, 61, 62, 63 so that the rotation speed of the lead cam shaft 59 can be arbitrarily set. The moving shaft 65 for connecting the seedling mounting table 20 to the lead metal 64 that fits into the lead cam shaft 59, engages the lead claw with the groove of the cam shaft 59, and reciprocates right and left. Installed.

Incidentally, 66 is a seedling feed drive shaft, which is provided rotatably so that both ends protrude to the left and right outside of the transmission case 19, and a rotating arm 67 with a roller is attached to the tip side,
The operation arm 70 of the ratchet mechanism 69 provided on the transmission shaft of the seedling transfer belt 68 stretched on the bottom surface of the seedling mounting table 20 engages when the seedling mounting table 20 moves to the lateral end, and Transfer belt
68 is configured to be driven and rotated.

Next, the operation of the above example will be described. When the seedling is placed on the seedling mounting table 20 and each part is driven by the engine 10, the passenger tractor 1 is propelled by the rotation of the front wheel 5 and the rear wheel 7, and the seedling planting machine is driven.
The 18 parts are leveled by floats 22, 23, and 23, which are partially towed by the load and towed, and power is transmitted from the front transmission case 3 side to the output shaft 45, the transmission, the transmission shaft 47, and the intermediate transmission shaft via the transmission shaft. 48, the first shaft in the transmission case 19 via the input shaft 49
50 is transmitted. Then, the second shaft 56 is transmitted from the first shaft 50 in the transmission case 19 via the peripheral speed changing transmission mechanism A, and the drive shaft 28 for driving the seedling planting apparatus 21 by the chain 54 from the second shaft 56. While being transmitted, the lead camshaft 59 is rotationally transmitted from the first shaft 50 via the speed change gear, and the lead metal 64,
The seedling table 20 is reciprocated right and left via the moving shaft 65. The rotation of the drive shaft 28 drives the rotating case 29, and the non-circular sun gear 31 in the case 29
32, the implant mounting shaft 34 is transmitted via the planetary gear 33, and the implant 36 swings during turning. That is, the planting trajectory P on the loop is drawn in the vertical direction in which the tip of the planting claw 39 of the implant 36 is shown. Then, when the planting claw 39 protrudes below the soil surface, the cam floor 43a integrally provided on the base side of the lever 43 just corresponds to the concave portion 38a of the cam body 38, and the elevating shaft 41 is pushed out by the spring 42. Then, the pushing claw 40 is lowered. By the operation of the transplanting tool 36, the seedlings for one plant are divided and held from the seedling dividing port 27 of the seedling receiving frame 26, transferred to the soil surface, and pushed out of the pushing nail 40.
Seedlings are planted.

In the operation of the implant 36, the rotation of the rotating case 29 to which the implant 36 is attached is decelerated while the implant 39 is protruding below the ground surface by the peripheral speed changing transmission mechanism A. The transmission gears 31, 32, and 33 in each rotation case 29 are formed as non-circular gears.
At the time of planting when the 39 enters below the soil surface, the rearward swing is reduced so that the distance L for the planting claw 39 to move rearward on the soil surface is extremely large. And the size of the planting hole of the plant formed at the time of planting can be reduced.

That is, the gear transmission mechanism between the sun gear 31 and the planetary gear 33 is:
In order to shorten the distance L in which the implantation claw 39 of the implant 36 moves in the soil at the time of implantation, the angular velocity of the implantation tool mounting shaft 34 is increased when the implantation claw 39 protrudes below the soil surface. Graft mounting shaft 34
Non-circular gears consisting of continuous teeth with varying angular speeds are not linearly symmetric, so each gear meshes during its rotation and the depth of engagement fluctuates greatly. Play and errors can be prevented,
Even if the seedlings are rotated at a high speed during the seedling planting operation, there is little variation in the timing of planting seedlings in the field and the timing of taking out seedlings from the seedling mounting table 20, so that good seedlings can be planted.
Even if a transmission mechanism in which the angular velocity of the implant mounting shaft 34 fluctuates so that the distance L that moves on the soil surface at the time of planting becomes shorter, a gear transmission mechanism that does not increase transmission play or error is obtained. Therefore, it is possible to draw the optimal trajectory on the theory of seedling planting action, the planting hole formed by the planting claw 39 on the soil surface during planting becomes small, and the planting posture is stabilized. As a result, the seedlings can be energized well after planting, and the number of floating seedlings can be reduced even in a paddy field where water is deep, so that good seedling planting work can be performed.

In the embodiment of the present invention, the rotation of the rotary case 29 is configured to change the angular velocity by the eccentric gears 57 and 58. Of course, it may be a gear.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall side view of a riding type seedling plant, FIG. 2 is an overall plan view of the riding type seedling plant, and FIG. FIG. 4 is a partial cross-sectional side view of the main part, FIG. 5 is a plan cross-sectional view of the main part, FIG.
(C) is a side view for explaining the action of simultaneously drawing the meshing set position of the non-circular gear and the position of the implant, and FIG. 7 is a side view showing the meshing state of the gears. In the figure, reference numeral 1 is a towing vehicle, 18 is a seedling planting machine, 20 is a seedling mounting table, 21 is a seedling planting device, 28 is a drive shaft, 29 is a rotating case,
31 is a sun gear, 32 is a planetary intermediate gear, 33 is a planetary gear, 34 is a transplant tool mounting shaft, 36 is a transplant tool, 39 is a planting claw, P is a loop-shaped locus of the planting claw tip, and L is a planting claw. Indicates the distance the claw moves on the soil surface.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-5711 (JP, A) JP-A-60-237904 (JP, A) JP-A 49-25297 (JP, B1) JP-A 42- 17762 (JP, B1) Automated Books (4) 1 Example mechanical, control (3) 127-P132 Taiga Publishing

Claims (1)

(57) [Claims] A rotating case (29) containing a gear transmission mechanism provided so that a planetary gear (33) turns around a sun gear (31).
Is fixed to a drive shaft 28, and a transplant tool 36 having a planting claw 39 is fixed to a transplanting tool mounting shaft 34 that rotates integrally with a planetary gear 33, and the tip of the planting claw 39 rotates the rotating case 29. In the seedling planting apparatus which operates so as to take out a seedling for each plant from the seedlings placed on the seedling mounting table 20 and to plant the seedlings in a field by turning and drawing a loop-like locus P with the The gear transmission mechanism between the gear 31 and the planetary gear 33 has an implant mounting shaft 34 for shortening the distance L in which the implant 39 of the implant 36 moves in the soil at the time of implantation.
The non-circular gears are not linearly symmetric and consist of continuous teeth in which the angular velocity of the implant mounting shaft 34 fluctuates so that the angular velocity of the implant 39 is protruding below the soil surface so that it becomes faster. Seedling planting equipment.