JPH03216107A - Planting device of transplanter - Google Patents

Abstract

PURPOSE:To equip even a transplanter of walking type with a rotary type planting device by using a proper unequal radius gear in a gear row in a rotary case and making a gyration radius of the rotary case smaller than that of a transplanting lever. CONSTITUTION:A proper unequal gear is used in a gear row in a rotary case 20, the gear row lining a sun gear 26, counter gears 34a and 34b and a planetary gear 33 is properly bent, the gyration radius of the rotary case is made smaller than that of a planting lever 21, a locus of the tip end of the planting lever has an approximately crescent state and a shape of crossing in a form of letter 8 and the rotary case can be compacted.

Description

[Detailed Description of the Invention] (1) [Industrial Application Field] The present invention is provided with a seedling stand for holding seedlings for transplantation and a planting device for planting an appropriate amount of seedlings on the cutting stand. In addition, it relates to a planting device in a transplanting machine such as a walking rice transplanter. [Prior Art] As a planting device for a transplanter, there are two types: a swinging crank type in which a crank drives a planting rod with transplanting claws that hold seedlings, and a gear mechanism to drive a planting rod attached to a rotating case. For example, most walking-type rice transplanters use the swinging crank type, while many riding-type rice transplanters use the rotary type. The reason for this is due to the structural differences between riding and walking types. In other words, in the riding type, the seedling platform is installed at an angle with the front side facing upward in the direction of movement of the aircraft, and the seedlings are taken out from the back of the platform, so the seedling platform is installed at a constant speed. In order for the seedling held by the transplanted nail to be inserted into the field almost perpendicularly, the trajectory of the tip of the transplanted nail should be elliptical. On the other hand, in the walk-behind type, the seedling stand is slanted so that the front side is lower, and it is used for cultivating seedlings. Since the seedlings are taken out from the front side of the stand, in order for the seedlings to be inserted almost perpendicularly into the field, the path of the tip of the transplanted nail should be approximately crescent-shaped, concave forward, and It must be a complex shape that crosses in a figure eight. Traditionally, a swinging crank type was considered the most suitable for this purpose. [Problems to be Solved by the Invention] However, the swinging crank type planting device is inferior to the rotary type in its smooth operation, making it difficult to expand to higher speeds, and producing large amounts of noise and vibration. There was a problem. Therefore, an object of the present invention is to enable a rotary-type planting device to be employed in a transplanting machine, such as a walk-behind rice transplanter, which is conventionally provided with a swing-crank-type planting device.

[Means for Solving the Problems] In order to solve the above problems, the present invention has the following configuration. That is, in the planting device of the transplanter according to the present invention, the base side is fixed to the planting rod having the transplanting claws that clamp the seedling, and the planting rod drive shaft that drives the planting rod, and the distal side has A rotary case is provided in which a socket rod mounting shaft to which the socket rod is attached is rotatably supported, and within the rotating case, a sun gear attached to the socket rod drive shaft and a shaft mounted on the socket rod are provided. A planetary gear attached to a mounting shaft, a first counter gear that meshes with the sun gear, and a second counter gear that is integral with the first counter gear and mesh with the planetary gear are provided. unequal diameter gears are used in which the distance from the rotation center to each tooth is not constant, and each gear is set so that the position where the long diameter part of the sun gear meshes with the counter first gear is located below the rotation center of the sun gear. It is characterized by the gear phase being set. [Function] By using appropriate unequal diameter gears in the gear train in the rotating case, the gear train following the sun gear, counter gear, and planetary gear can be appropriately bent. As a result, the rotation radius of the rotating case becomes smaller than the rotation radius of the implantable rod, and it becomes possible to make the locus of the tip of the implantable rod into a predetermined shape that is approximately crescent-shaped and crosses in a figure-eight shape. ,
The rotating case can be made more compact. In addition, since the position where the long diameter part of the sun gear meshes with the first counter gear is located below the rotation center of the sun gear, the moving speed of the tip of the implanted rod is slow at the top of the trajectory and faster at the bottom. , it is possible to receive seedlings from the nursery bed using the planting rod and to transplant the seedlings into the field. [Example] The example shown in the drawings will be described below. Figures 6 and 7 show a walking rice transplanter as an embodiment of the present invention, and this walking rice transplanter 1 has a transmission case 2, an engine 3, a hydraulic unit 4, etc. arranged at the front of the machine. A chain case 6.6 is provided rearward so as to be rotatable up and down at the tip of rotating cylinder parts 5, 5 protruding from the sides of the transmission case 2, and a running wheel 7 is provided at the rear end of the chain case. , 7 are attached. On the back of the mission case 2, there is a main frame 9 extending rearward.
The base of is fixedly connected. The main frame 9 is curved obliquely upward at the middle part, and a seedling stand 10 is provided at an angle along the rear part 9a of the main frame so that the front part is at the lower side. A transmission case 11 of the planting section is provided at the lower front position of the seedling stand 10, and planting devices 12, . . . for the number of planting rows (4 in the embodiment) are attached to this. The seedling stand 10 is supported by a support frame l3 attached to the main frame 9 and rails 14 so as to be slidable left and right. The upper surface of the seedling platform 1O is divided into seedling sections 10a, . . . for the number of planting rows divided into equal parts, and a belt is used to send the seedlings on the platform downward for each seedling platform 10a, . . . A type of seedling feeding device 15, . . . is provided. Further, a receiving plate l7 is fixedly provided at the lower part of the seedling platform 10, and seedling take-out ports 18, . It has been done. As shown in FIGS. 1 and 2, the planting device l2 of this rice transplanter includes a rotating case 20 containing a built-in gear train, and a planting rod 21 attached to the rotating case. The rotating case 20 has a substantially triangular shape when viewed from the side, and is fixedly attached with a key 24 to a horizontal implantable rod drive shaft 23 inserted into one corner of the triangle. The implantable rod drive shaft 23 is a rotating shaft that protrudes from the transmission case l1. A sun gear 26, which is freely rotatable with respect to the shaft and is integrated with the transmission case 11 via a fixed metal 25, is loosely fitted into the inserted portion of the implantable rod drive shaft 23 into the rotating case 20. Note that the fixed metal 25 and the sun gear 26 are non-rotatably engaged with each other by respective claws 25a and 26a. At some of the other corners of the rotating case 20, a stud attachment shaft 28 and a counter shaft 29 are provided. The implantable rod attachment shaft 28 is rotatably supported by bearings 30 and 31, and one end thereof protrudes from the rotating case 20. A planet gear 33 is attached to the implantable rod attachment shaft 28, and a counter gear 34 is attached to the counter shaft 29. The counter gear 34 consists of a first gear 34a and a second gear 34b that are integral with each other.
meshes with the sun gear 26, and the second gear 34b engages with the planetary gear 3.
It meshes with 3. Each of these gears 26, 33.34a,
34b are circular gears of the same diameter, each of which is appropriately eccentric with respect to the shaft to which it is attached. A line connecting the center O1 of the implantable rod drive shaft 23 and the center 02 of the counter shaft 29, and a line connecting the center 02 of the counter shaft 29 and the center 03 of the implantable rod mounting shaft 28.
Since the lines connecting them cross each other, a phase shift (180'10) is provided between the first counter gear 34a and the second counter gear 34b. In the illustrated example, θ=
68627'33''. Also, Taiyo Gya 26
When the maximum diameter portion of is engaged with the counter first gear 34a (
(shown by a chain line in FIG. 1), the engagement point is set to be located below the center Ox of the implantable rod drive shaft 23. In addition, gears 26, 33, 34a, 34b
The gears do not necessarily have to be circular eccentric gears, and in some cases, gears with unequal diameters in which the distances from the center of rotation to each rip are not constant may be used, as shown in FIG. 3, for example. Furthermore, the shapes of each gear 26, 33.34a, 34b may be different.

The implanted rod 2l has a pair of implanted claws 40. 40 and one extruded body 41, which is fixedly attached to the protrusion of the implantation rod attachment shaft 28 with a cotter pin 42. A cylindrical shaft 45 that fits into the square hole 44 of the rotating case 20 is rotatably fitted to the planting rod mounting shaft 28, and the seedling pusher 4l is driven to the end of the cylindrical shaft on the planting rod side. A cam 46 is formed for this purpose. A cam follower 49 supported by a shaft 48 is in contact with the outer peripheral surface of the cam 46, and a swinging arm 50 integrated with the cam follower swings as appropriate.
The seedling pusher 41 is designed to protrude and retreat intermittently. Note that the swing arm 50 is urged in a predetermined direction by a spring 5l. When the implantation rod drive shaft 23 rotates in a predetermined direction, the entire rotating case 20 rotates in a certain direction (direction A), and the implantation rod 21 moves up and down so that the tips of the implantation claws 40 and 40 draw a trajectory P. Do exercise. As shown in the figure, the locus P has an overall crescent shape with a convex rearward shape, and the locus P intersects at the bottom in a figure 8 shape. And at point P+ a pair of transplanted nails 40.4
0 clamps the seedlings supplied to the seedling outlet 28 and plants them in the field at point p2. Further, at point p3, the seedling extruder 4l protrudes into the space between the transplanted claws 40 and 40, and the seedling lifted up while being held by the transplanted claws is forcibly released from the transplanted claws. Taiyo Gya 26,
Since the gear train following the counter gear 34 and the planetary gear 33 is bent, the rotation radius R of the rotating case 20. is the implanted rod 2
The rotation radius R2 is smaller than the rotation radius R2 of 1, and the above-mentioned predetermined locus P can be obtained, and the rotation case 20 is compact, and the entire planting device is miniaturized. Further, when the maximum diameter portion of the sun gear 26 engages with the first counter gear 34a, the engagement point is set to be located below the center Ox of the implanted rod drive vehicle 23, so that the implanted claw 40 The moving speed of the tip of .40 is slow at the top of the trajectory P,
The speed is faster at the lower part, so that the seedlings can be reliably clamped at the germ removal port 28, and the clamped seedlings can be quickly planted in a good condition in the field.

Next, FIGS. 4 and 5 show a different embodiment, and this planting device 12' has a different configuration of the gear train in the rotating case 20'' compared to the previous embodiment 12. That is, the rotation A socket rod drive shaft 23' is provided in the center of the case 20'', and a socket rod mounting shaft 28' and a counter shaft 29' are provided on both sides of the shaft, and these axes are aligned on the same straight line (θ=0
0). The sun gear 26' that is loosely fitted on the stud drive shaft 23' and the first counter gear 34a' that meshes with the sun gear 26' have a relatively small diameter and the same diameter as the planetary gear 3.
3' and the counter second gear 34b' that meshes therewith have a relatively large diameter and the same diameter. Note that the implantable rod drive shaft 23' is fixed to the transmission case 11, the implantable rod mounting shaft 28' is rotatably supported, and the first counter gear 34a' and the second counter gear 34b'. This embodiment is similar to the previous embodiment in that it is integrally formed. The implantable rod 2l is the same as that of the previous embodiment, and the implantable rod mounting shaft 28'
It is fixedly attached to. In addition, this planting device 1
2' also, when the maximum diameter part of the sun gear 26' meshes with the first counter gear 34a', the meshing point is located lower than the center 01' of the implanted rod drive shaft 23'. It is set. The trajectory P' of the tip of the transplanted nail by the planting device M12' substantially coincides with the trajectory P described above. In this planting device 12', the sun gear 26', counter gear 34, and planetary gear 33' are lined up on the same straight line, but this is different from the conventional rotary type planting device in which each gear is arranged in sequence. Instead, the bending of the gear train that continues from the sun gear 26′ to the untag gear 34′ to the planetary gear 33′ is made larger than in the previous embodiment, and θ10″
That is. This embodiment 12' also has the same effect as the previous embodiment 12. [Effects of the Invention] As explained above, the planting device of the transplanter according to the present invention is a rotary type in which the planting rod is driven by a gear mechanism, and by appropriately configuring the gear train in the rotating case, , the rotation radius of the rotating case can be made smaller than the rotation radius of the planting rod, and the ideal trajectory of the tip of the planting rod in the figure 8 shape required especially for walk-behind rice transplanters. is now available. Additionally, the rotating case has been made more compact, making it possible to shorten the dimensions of the planting device, especially in the front-back direction. In this way, it is possible to adopt a rotary-type planting device to a walking rice transplanter, and it is expected that the performance of the walking rice transplanter will be improved in terms of vibration reduction and high-speed response.

[Brief explanation of drawings]

Fig. 1 is a partially sectional side view of one embodiment of the planting device according to the present invention, Fig. 2 is an expanded sectional view thereof, and Fig. 3(a).
(b) is an explanatory diagram showing the shape of the gear, FIG. 4 is a partially sectional side view of a different embodiment, and FIG. 5 is an expanded sectional view thereof. Furthermore, Fig. 6 is a side view of the walking rice transplanter, and Fig. 7 is its plan view. 1...Walking rice transplanter (transplanter), 1
0... Seedling stand, 1l... Transmission case, 12.12'
...Planting device, 20.20'...Rotating case, 21
... implantable rod, 23, 23' ... implantable rod drive shaft, 26
．． 26' sun gear, 28. 28'...Socket rod mounting shaft, 33.33'...Planetary gear, 34.
34'...Counter gear, 34a, 34a---Counter first gear, 34b, 34b''...Counter second gear.

Claims (1)

[Claims] (1) A planting rod that has a transplanting claw that holds the seedling, the base side is fixed to the planting rod drive shaft that drives the planting rod, and the planting rod is attached to the tip side. and a rotating case in which a shaft is rotatably supported, and inside the rotating case,
A sun gear attached to the implantable rod drive shaft, a planetary gear attached to the implantable rod mounting shaft, a counter first gear that meshes with the sun gear, and a planetary gear that is integrated with the counter first gear. A counter second gear that meshes with the gear is provided, and these gears include gears with unequal diameters in which the distance from the rotation center to each tooth is not constant, and furthermore, the long diameter part of the sun gear is connected to the counter first gear. A planting device for a transplanter, characterized in that the phase of each gear is set so that the position where it meshes with the sun gear is located below the rotation center of the sun gear.