JPH074B2 - Seedling planting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is used for a rotary type seedling planting device used for a rice transplanter and the like.

[Conventional technology]

As can be seen in JP-A-61-40829, a rotary type seedling planting device is used in place of the conventional crank type seedling planting device in order to reduce vibration and speed up seedling planting. Is starting to appear.

[Problems to be Solved by the Invention]

As shown in the above publication, the planting claw is provided so as to rotate integrally with the planetary gear, and when rotating around the sun gear, the unequal rotation of the sun gear and the planetary gear does not occur. It is configured such that the downward posture swings slightly in the front-rear direction in cooperation with the speed. That is, in this rotary system, since the swivel case to which the planting claw is attached is swung in the front-rear direction, the load is high, and there is a risk that the installation between the planetary gear side and the swivel case may become loose. The number of seedlings planted per strain may fluctuate.

Japanese Patent Laid-Open No. 60-66908 proposes a screw whose mounting angle between the shaft and the swivel case can be adjusted. However, in this product, the swivel case is fixed to the planetary gear side only by a screw adjusting portion. Since it is not fixed at a portion distant from the axis in the radial direction, there is a risk that the fixation between the axis and the swivel case may become loose due to uncertain fixing,
It has not been put to practical use at all.

[Means for solving the problem]

The present invention, in order to solve the above problems, a plurality of planetary gears 33, 33 is fixed to a drive shaft 28 a rotating case 29 provided so as to rotate around the sun gear 31 in a similar posture, Revolving shaft 34 that revolves together with each planetary gear 33
-Fix the mounting bodies 42, 42 to 34 by the side of the rotating case 29,
Swivel case 40 with planting claws 40b and 40b on each mounting body 42 and 42
The a and 40a are fixed around the swivel shafts 34 and 34 so that they can be rotated and adjusted, and the planting claws 40b and 40b swivel in the same posture as the rotating case 29 rotates, and are mounted on the seedling table 20. In the seedling planting device that operates so as to take seedlings one by one from the placed seedlings, swivel by turning screws 44, 44 between each mounting body 42, 42 and swivel case 40a, 40a An adjusting mechanism A for finely adjusting the relative positions of the shafts 34, 34 is provided, and the mounting bodies 42, 42 and the swivel cases 40a, 40a are arranged substantially along the plane of rotation of the rotary case 29. Mounting part 42c, 42c, 40d protruding in the vertical direction
-The seedling planting device is characterized in that it is provided with 40d and is fixed by the fixtures 43, 43 at least at two positions distant from the turning shaft 34 in the radial direction.

[Action effect]

The present invention relates to an adjusting mechanism A for finely adjusting the relative positions of the mounting bodies 42, 42 and the swivel cases 40a, 40a by rotating screws 44, 44 around the swivel shafts 34, 34. Because A is provided,
The position of each mounting body 42, 42 and each swivel case 40a, 40a can be set appropriately, and each mounting body 42, 42 and each swivel case 40a
40a is provided with mounting portions 42c, 42c, 40d, 40d projecting in a direction substantially along the plane of rotation of the rotating case 29, and fixing members 43, 43 are provided at least at two positions radially separated from the swivel shaft 34. Since they are fixed by means of, the fixing work of both is easy, the mounting is strong, and it is prevented from loosening on the way, and the problems of the conventional example can be solved appropriately.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, a seedling planting device 18 is attached to a rear end of a link 15 protruding rearward from the traveling vehicle body 1 to form a riding type rice transplanter.

The traveling vehicle body 1 is configured as follows. A front mission case 3 and a rear mission case 4 are provided in front of and behind the machine casing 2. A pair of front wheels 5 are arranged on both sides of the front mission case 3, and a pair of transmission cases 6 extend rearward from both sides of the rear mission case 4 so that rear wheels 7 can be attached to the rear ends of the respective cases. The front wheel 5 and the rear wheel 7 reach the front wheels 5 and the rear wheels 7 through the front mission cases 3 and 4, and these are rotated on the paddy field in the paddy field so that the traveling vehicle body 1 propels them. A prime mover 10 is covered with a hood 11, and a seat 12 is provided on the hood 11. The post 8 extends upward at the tip of the machine frame 2, and when the handle 9 on it is operated, the front wheels 5 are steered. The left and right posts 13 extend upward from the horizontal rod 14 connecting the pair of transmission cases 6, and the left ends of the upper link 15b and the pair of lower links 15a are rotatably mounted, and the rear ends of the respective links 15a, 15b. The mounting frame 16 (at the right end) can be moved up and down by a hydraulic cylinder 17.

The seedling planting device 18 is configured as follows. Transmission case 19
Is mounted on the mounting frame 16 by the rolling shaft 25. A seedling placing table 20 is provided on the transmission case 19 in a forward tilted manner, and five mat seedlings are placed side by side so that the seedling placing table 20 can be moved back and forth from side to side.

A seedling receiving frame 26 having an L-shaped cross section is provided at the lower end of the seedling mounting table 20 and is a transmission case 19
The end of the mat seedling, which is fixed to the seedling mounting table 20 and projects downward from the seedling mounting table 20, can be moved left and right on this. Five seedling intakes 27 are provided in the seedling receiving frame 26, and the planting claw 40 of the seedling planting device 21 is provided.
The b passes through the respective seedling inlets 27 from top to bottom so as to cut off the end of the mat seedlings. A central float 20 and a pair of side floats 23 are arranged below the transmission case 19, slide on the mud surface by the forward movement of the traveling vehicle body 1, and each of the planting claws 40b prepares the soil for planting the seedlings in advance. It is supposed to do. And this transmission case 19
Is made up of a front main transmission case 19a, three vertical cases 19b extending from the main transmission case 19a under the seedling receiving frame 26, and a tubular horizontal case 19c at the rear end of each vertical case 19b ( (Fig. 2).

The drive shafts 28 that rotate under the power of the prime mover 10 are laterally attached to the respective lateral cases 19c, and the central drive shafts 28
Are projected to the left side, the left and right drive shafts 28 are projected to both sides, and the rotating case 29 is fixed to the respective projecting ends. The following is the same or symmetric, so one of them will be described.

As shown in FIG. 3, the surface of the rotating case 29 on the side far from the lateral case 19c is fixed to the projecting end of the drive shaft 28, so that the two cases are
It is designed to be rotated by the power of. That is, the rotating case 29 is made of a light alloy in a monaca shape, and the metal 29a shown in FIG. 7 is inserted into the far side surface of the rotating case 29. The metal 29a and the drive shaft 28 are keyed together, and then a nut is used. It is tightened. The sun gear 31 is rotatably attached to the drive shaft 28 in the rotating case 29, and the claw 31a at the right end thereof is attached.
However, it is configured so as not to rotate by engaging with the claw 30a of the fixed metal 30 fixed to the lateral case 19c. A pair of planetary gears 33 are arranged symmetrically around the outer periphery of the rotating case 29, and the intermediate gears 32 mesh with the sun gear 31. The sun gear 31 and the planetary gear 33 have the same number of teeth, and when the rotating case 29 makes one revolution, the planetary gear 33 makes one revolution in the opposite direction. That is, when the rotating case 29 rotates around the axis of the drive shaft 28, the planetary gear 33
Turns around its axis while maintaining the same posture with respect to the ground. The sun gear 31 is provided such that its center of rotation a is eccentric with respect to the center b of the pitch circle, and the intermediate gear
The 32 and the planetary gear 33 are also eccentrically provided in the same manner and are always in mesh with each other. Therefore, since the center of the pitch circle of the sun gear 31 is eccentric with respect to the center of rotation, the non-uniform velocity motion is transmitted to the intermediate gear 32. This is transmitted to the planetary gear 33, and the planetary gear 33 swings once around its axis during one turn.

A pair of revolving shafts 34 fixed to the planetary gears 33 is a rotating case 29.
To the left, and a mounting body 42 is firmly fixed to the projecting end by a cotter 41. A pair of swivel cases 40a are rotatably attached to the swivel shafts 34 with downward facing planting claws 40b fixed to the ends thereof toward the seedling mounting table 20 side, and bolts 43 as a fixture. Are fastened and fixed to the respective mounting bodies 42. The swivel case 40a and the mounting body 42
The mounting portions 40d and 42c projecting in a direction substantially along the plane of rotation of the rotating case 29 are formed on the.
Is inserted into an arc-shaped elongated hole 42a centered on the swivel shaft 34 formed in the mounting portion 42c, and the mounting portion 40d of the swiveling case 40a is attached.
It is designed to be screwed into a female screw.

On the other hand, the protrusion 42b is provided on the mounting body 42 in the radial direction, and the screw 44 is screwed in the distal end portion thereof in the circumferential direction. When the head contacts the contact surface 40c of the swivel case 40a, loosens the bolt 43 and turns the screw 44, the lead of the screw 44 causes the head of the screw 44 to rotate the swivel case 40a by a small amount.
It is designed to be pushed and rotated in the direction of rotation (counterclockwise). Then, when the nut 45 is tightened, its position is held. In this way, with the screws 44, nuts 45, etc., the mounting body 42
An adjusting mechanism A for finely adjusting the turning of the turning case 40a around the turning shaft 34 is configured.

Therefore, when the bolt 43 is loosened, the swivel case 40a moves to the swivel shaft 34
This bolt is configured to be able to rotate a predetermined amount around this bolt.
If the bolt 43 is tightened after adjusting the position of the swivel case 40a with the adjusting mechanism A while loosening 43, the swivel case 40a
Is firmly fixed to the mounting body 42.

Then, the sun gear 31 is fixed to the fixed metal 30 so that the planting claw 40b has a slightly horizontal posture in which the tip is raised in the upper portion during turning and is in a vertical posture in which it is downward in the lower portion.
It is engaged and fixed to.

As shown in FIGS. 3 and 4, the pushing claw 48 fixed to the lower end of the push rod 47 is configured to move up and down at the lower abdomen of the planting claw 40b. A shaft 38 integral with the cam 39 extends rightward from the turning case 40a, and its end is fixed to the rotating case 29 by a claw c. That is, when the rotating case 29 rotates, the planetary gear 33 rotates with respect to the rotating case 29. Therefore, the swivel case 40a, which is integral with the planetary gear 33, is installed around the sun gear 31.
When turned, the cam 39 integrated with the rotating case 29 makes one rotation with respect to the turning case 40a. Then, this cam 39 is connected to the upper end of the push rod 47 by a lever 49 that swings around a pin 50, and when the planting kite claw 40a comes to the lower end, the right end of the lever 49 comes out from the protruding portion of the cam 39. The spring 51 pushes down the push rod 47 and the pushing claw 48 pushes down the seedling. When the planting claw 40a moves up to a predetermined position, the cam 39 pulls up the push rod 47.

As shown in FIG. 3 and FIG. 5, when the eccentric body 36 is fixed to each planetary gear 33, the resistance arm 35 is pressed by the spring 37, and the planting claw 40b passes through the seedling intake 27, respectively. The tooth shapes of the gears 31, 32, and 33 are in contact with each other on the same side, and the tip of the planting claw 40b is prevented from moving back and forth due to the backlash of the gears.

Next, the operation of the above example will be described. When the seedlings are placed on the seedling placing table 20 and each part is driven by the prime mover 10, the traveling vehicle body 1 moves the front wheels 5
And the rear wheels 7 are rotated to propel the 18 parts of the seedling planting device with the load partially received by the leveling floats 22, 23, and 23, and the power is transmitted from the front mission case 3 side through the transmission shaft. It is transmitted to the input shaft in the transmission case 19. In this way, power is transmitted from the input shaft in the transmission case 19 to the drive shaft 28 via an appropriate transmission route. Then, each rotating case 29 rotates, the intermediate gears 32, 32 are planet-rotated around the sun gear 31, and the planetary gears 33, 33 meshing with the sun gears 31 are also rotated.

Therefore, the orbiting shafts 34, 34 are rotated by the planetary gears 33, 33, but this rotation is rotated at the same rotational speed as the rotating case 29 due to fluctuations in the peripheral speed of rotation. The reason is that the sun gear 31, the intermediate gears 32 and 32, and the planet gears 33 and 33 are eccentric gears.
This is because it has the same number of teeth as 33.

Therefore, the swivel case 40a attached to the swivel shaft 34 via the mounting body 42 swings with respect to the rotary case 29, and the tip of the planting claw 40b attached to the swivel case 40a draws the planted portion. The locus becomes a closed loop with a long vertical direction.

Then, the planting claw 40b intervenes downward from above into the seedling dividing port 27 of the seedling receiving frame 26 on the side of the seedling mounting table 20 and divides and engages the seedlings for one strain that are fed out here. Move to. At this time, the upper surface of the seedling is received by the pushing claw 48. The seedlings brought to the soil surface in this way are pushed by a cam 39.
It is extruded into the soil and planted by the downward movement of the extrusion claw 48 provided at the tip of 47.

Next, a means for changing and adjusting the seedling division amount will be described.

When reducing the seedling division amount, first loosen the bolts 43 ・ 43. Next, loosen the rotation-preventing nut 45, rotate the screw 44, and push the contact surface 40c of the swivel case 40a with the head of the screw 44 to rotate the swivel case 40a around the shaft core with respect to the mounting body 42. It is rotated in the rotational direction of 29 so that the tip of the planting claw 40b is swung downward. And after adjustment,
Tighten the non-rotating nut 45 and secure them with bolts 43 and 43.

Next, when increasing the seedling division amount, loosen the bolts 43 and 43 and loosen the rotation-preventing nut 45, and then first increase the seedling division amount (in the direction opposite to the rotation direction of the rotating case 29). ) Turn the swivel case 40a excessively. After that, turn the screw 44 to push the contact surface 40c of the swivel case 40a with the head of the screw 44,
The swivel case 40a is rotated about the axis in the rotational direction of the rotary case 29 with respect to the mounting body 42, and the tip of the planting claw 40b is adjusted so as to swing downward. Then, after the adjustment, the rotation preventing nut 45 is tightened and the both are fixed by the bolts 43.

When resistance is applied to the planting claw 40b during seedling splitting and planting, rotation reaction force is applied to the swivel case 40a and the bolts 43, 43 loosen and the seedling splitting amount increases gradually. When this becomes extreme, the seedling receiving frame 26 is planted. Although a situation in which the claw 40b collides occurs, the adjustment after fixing as described above allows fine adjustment to be performed accurately and the screw 44 of the adjusting mechanism A to be rotated by the rotational reaction force of the rotating case 40a. It also functions as a stopper to prevent seedlings, and the planting work of appropriate seedlings can be performed without unexpectedly changing the seedling division amount even after long-term use.

[Brief description of drawings]

FIG. 1 is a side view of a rice transplanter according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is an enlarged sectional plan view of a part thereof, FIG. 4 is a side view thereof, and FIG. Part 1 is an open side view, FIG. 6 is a plan view of part 1, and FIG. 7 is a perspective view of a metal for the insert. Explanation of code 20 …… Seedling stand, 28 …… Drive shaft 29 …… Rotating case, 31 …… Sun gear 33 …… Planetary gear, 34 …… Swivel axis 40a …… Swivel case, 40b …… Planting claw 40d …… Mounting part, 42 …… Mounting body 42c …… Mounting part, 43 …… Fixing tool (bolt) 44 …… Screw, A …… Adjustment mechanism

Claims (1)

[Claims] 1. A rotary case 29, in which a plurality of planetary gears 33, 33 are provided so as to rotate around the sun gear 31 in the same posture, is fixed to a drive shaft 28, and each planetary gear 33, 33 The mounting bodies 42, 42 are fixed to the rotating shafts 29, 34 that rotate together as one unit, on the side of the rotating case 29, and the mounting claws 40b, 4 are attached to each mounting body 42, 42.
The swivel cases 40a and 40a having 0b are fixed around the swivel shafts 34 and 34 so as to be adjustable in rotation, and the planting claws 40b and 40b swivel in the same posture as the rotary case 29 rotates. Seedling stand
In the seedling planting device that operates to take seedlings one by one from the seedlings placed on 20, the rotation of screws 44, 44 between each mounting body 42, 42 and each swivel case 40a, 40a In addition to providing the adjusting mechanism A for finely adjusting the relative position of the turning shaft 34 and 34 around the turning shaft 34, 34, each mounting body 42, 42 and each turning case 40a, 40a.
Is provided with mounting portions 42c, 42c, 40d, 40d projecting in a direction substantially along the plane of rotation of the rotating case 29, and is fixed to the fixtures 43, 43 at least at two positions radially separated from the swivel shaft 34. Seedling planting device characterized by being fixed by fixing.