JP2576107B2 - Transplant machine - Google Patents

Description

The present invention relates to a transplanter such as a rice transplanter.

[Problems to be solved by conventional technology and invention]

Conventionally, while providing a seedling mounting table for placing the seedlings and reciprocating right and left, and providing a transplanting device for dividing the seedlings one by one from the seedlings that move laterally with the seedling mounting table and transplanting them to the soil,
There is a transplanter in which the seedling stage moves at a constant speed and the transplanting device rotates at a constant speed. In this conventional transplanter, the transplanter divides seedlings one by one from seedlings that are moving in the left and right direction. It is desirable to minimize the amount of movement. However, since the amount of movement of the seedling table for each division of the seedling of the transplanting apparatus is set in accordance with the seeding amount, the form of the seedling, or the method of transplantation, the amount of movement of the seedling table is arbitrarily adjusted. I can't.

Therefore, as shown in JP-A-61-212213,
There has been a configuration in which the moving speed of the seedling mounting table is reduced only when the seedlings are divided, so that the moving amount of the seedlings in the left-right direction at the time of dividing the seedlings is reduced, and the division of the seedlings is improved. However, since the seedling placing table reciprocating right and left is intermittently moved at a low speed, a problem arises that the sliding contact portion between the seedling placing table and its supporting portion is easily worn.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention provides a seedling mounting table 12 on which seedlings are placed and reciprocates left and right, and separates seedlings one by one from the seedlings which move laterally with the seedling mounting table 12 left and right. In a transplanting machine provided with a transplanting device 13 for transplanting into soil, an input shaft 16 that is driven by the power of a prime mover and is driven and rotated.
A reciprocating mechanism for reciprocating the seedling mounting table 12 left and right, a transmission mechanism for transmitting power to the transplanting device 13, and an angular speed transmission mechanism for changing the angular speed of the driving rotation of the transplanting device 13.
48, a power branching portion for transmitting power by branching into a reciprocating mechanism of the seedling mounting table 12 and a transmission mechanism to the transplanting device 13 on the lower side of transmission from the input shaft 16; The angular velocity transmission mechanism 48 is provided on the transmission path on the transmission mechanism side to the transplanting apparatus 13 on the transmission lower side from the part, and the angular velocity transmission mechanism 48 is provided when the transplanting apparatus 13 divides the seedling. The transplanting machine is characterized in that the angular velocity of the drive rotation of is set to be high.

[Functions and Effects of the Invention]

The transplanter according to the present invention has a smaller amount of lateral movement of the seedling when the transplanter divides the seedling, compared to a conventional device in which the seedling mounting table and the transplanter are driven at a constant speed. The division of the seedlings is improved, and the transplanting performance is improved. In addition, when the moving speed of the seedling mounting table during the splitting of the seedlings is configured to be low in order to reduce the amount of movement of the seedlings in the left-right direction during the splitting of the seedlings, the sliding contact between the seedling mounting base and its support is worn. However, according to the present invention, the problem can be avoided.

〔Example〕

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

1 is a passenger towing vehicle, a pair of left and right driving front wheels 2 for steering,
A control frame 5 is erected on the upper front side of a vehicle body 4 having a pair of left and right driving rear wheels 3, 3, a handle 6 is provided on the upper portion, and a cockpit 7 is provided on the rear side of the control frame 5. An integral step 8 is provided around the entire operation frame 5 and the operation seat 7.

Reference numeral 9 denotes a transplanter, and an elevating link mechanism 10 is provided at the rear of the towing vehicle 1.
Is mounted via. The transplanter 10 is provided on a front upper portion of a transplant transmission case 11 also serving as a machine frame so as to reciprocate right and left a seedling mounting table 12 having a front side inclined upward.
At the rear, a transplanting device 13 for dividing and transplanting the seedlings from the seedling mounting table 12 is provided, and a lower leveling float 14a at the center and left and right leveling floats 14b, 14b are mounted at a lower portion. The transplanter 10 is a double-row type transplanter having a plurality of the transplanting devices 15 at predetermined intervals in the left-right direction.

The power transmission mechanism of the transplanter 10 will be described. An input shaft 16 is transmitted by a pair of bevel gears 18 and 19 transmitted from a PTO shaft of the towing vehicle 1 via a propeller shaft 17. Reference numeral 20 denotes a lead cam shaft having an endless lead groove formed in the outer periphery. Reference numeral 21 denotes a lead metal, which is inserted into the lead cam shaft 20 and has a lead claw 22 which engages with the lead groove. 23 is a moving shaft, which is the lead metal
The seedling rest 12 is attached to the left and right front ends of the transplanting case 11.

Reference numeral 24 denotes a transmission, which includes the input shaft 16 and the lead cam shaft 20.
The transmission gears 28 and 29 integral with a shifter 27 in which an eccentric pin 26 engages with an inner end surface of a rotation shaft 25 which is interposed between the The gearshift 2
Gears 30 and 31 fixed to the lead camshaft 20 are provided at 8 and 29 so as to be selectively engageable, so that the rotation of the lead camshaft 20 can be shifted.

Reference numeral 32 denotes a transplant transmission shaft, on which sprockets 33, 33 are fixed on both left and right sides. Reference numerals 34, 34 denote drive shafts of the implanting device 15, to which sprockets 36, 36 driven by the sprockets 33, 33 via chains 35, 35 are mounted. The drive shaft 34 is provided so as to be decelerated and transmitted to the transmission shaft 32 by half.

Numerals 37, 37 are wedge-fitted to the tip of the drive shaft 34. Numeral 38 denotes a sun eccentric gear, which is fitted to the drive shaft 34, is integrally fixed to the transplant case 11, and is eccentric with respect to the drive shaft 34. Reference numeral 39 denotes a counter eccentric gear that meshes with the sun eccentric gear 38. 40 is an eccentric gear for driving the implanting device, and the counter eccentric gear is
A transplant tool 42 is mounted on a transplant tool mounting shaft 41 which is engaged with the gear 39 and fastens the gear 40. The transplant tool 42 has a configuration in which a transplant nail 43 is fixed to the tip of the transplant tool case 42a, and a seedling pushing fork 44 is provided on the back surface of the nail 43. The fork 44 is moved up and down by the rotating case 37.
Is fixed to a vertical sliding shaft 47 connected to a lever 46 which is rotated by a cam 45 which rotates integrally therewith.

Reference numeral 48 denotes an angular speed change mechanism.
49 and 50, which are interposed between the input shaft 16 and the transplant transmission shaft 37, so that the rotation of the transplant transmission shaft 32 becomes high speed or low speed within one rotation. I have. Then, the transplant nail 43 of the transplant tool 42 attached to the rotating case 37
When the seedlings are divided from the seedling mounting table 12, the rotating case
37 is set to rotate at high speed and to rotate at low speed when transplanting seedlings into the soil.

Reference numeral 51 in the figure denotes an operating shaft of a seedling vertical transfer belt 52 stretched on a seedling mounting table.

According to the configuration of the above example, the seedlings are mounted on the seedling mounting table 12, and the transplanter 15 is lowered so that the leveling floats 14a, 14b, 14b are in contact with the soil surface of the paddy field, and the towing vehicle 1 is propelled. Meanwhile, the input shaft 16 in the transplant case 11 is driven and rotated from the towing vehicle 1 side via the propeller shaft 17.

Then, the lead camshaft 20 is shifted from the input shaft 16 to the transmission
24 is transmitted through the speed reducer, and the lead metal 22 is
Is reciprocated right and left, and the seedling mounting table 12 is reciprocated right and left by the moving shaft 23.

On the other hand, the implant transmission shaft 32 is driven from the input shaft 16 via a pair of elliptical gears 49 and 50, and the implantation drive shaft 34 is driven and rotated from the shaft 32 via the chain 35, and the rotating case 37 is driven and rotated. Is done. The rotation of the rotating case 37 causes the internal planetary eccentric counter gear 39 and the planetary eccentric gear 40 to rotate around the eccentric sun gear 38, and the implant mounting shaft 41 rotates in reverse at the same rotational speed as the rotating case 37. At the same time, since the rotational angular velocity changes due to the transmission of the eccentric gear, the implant 42 fixed to the mounting shaft 41 makes a swinging motion.
Accordingly, the distal end of the transplant nail 43 draws and operates a closed loop-shaped transplant locus P which is slightly longer in the vertical direction.

Then, the transplanting nail 43 divides the seedlings for one plant from the seedling mounting table 12 and lowers the leveling floats 14a, 14b, 14b.
Transplant on soil leveled with. In this case, the rotating case
37 is transmitted by the elliptical gears 49 and 50 as the angular speed transmission mechanism 48, when dividing the seedling,
Moves slowly in the forward and backward direction when transplanting the seedlings into the soil, because the seedlings 12 move down and move left and right at high speed. In addition, the pulling of the seedlings is reduced and the transplanting posture can be improved.

It should be noted that the angular speed transmission mechanism 48 is not limited to the illustrated example, but if it is configured so that the angular speed shift setting can be changed between the input shaft 16 and the transplantation transmission shaft 32,
Adjustment can be made for changes in the transplanting posture due to the hardness of the soil surface. That is, as shown in FIG. 6, the sprung claw 54 attached to the shifter operating body 53 inserted into the transmission shaft 32 is inserted into the key groove 55.
, And a plurality of driven elliptical gears 56, 57... Rotatably fitted to the transmission shaft 32 are selectively rotated integrally with the shaft 32, and are wedge-fitted to the input shaft 16. , So that the rotational speed change position of the rotating case 37 can be changed by meshing with the driving elliptical gears 58, 59,.
Preferably, the speed of the rotating case 37 at the time of seedling transplantation may be set to be slightly higher than the minimum speed. Also,
The operating lever 60 of the shifter operating body 53 can be linked to a well-known sensitivity adjusting mechanism capable of adjusting the sensitivity of a control mechanism for raising and lowering the transplanter 9 by making the soil surface soft and soft.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a side view, FIG. 2 is a plan view of a main part, FIG. 3 is an enlarged side view of a main part, and FIG. FIG. 5 is a side view of an essential part, and FIG. 6 is a sectional view of an essential part of another example. In the drawings, reference numeral 12 denotes a seedling mounting stand, 13 denotes a transplanting device, 16 denotes an input shaft, and 48 denotes an angular speed transmission mechanism.

Claims (1)

(57) [Claims] 1. A seedling mounting table 12 on which seedlings are placed and reciprocated right and left.
And a transplanter for dividing seedlings one by one from seedlings that move laterally with the seedling mounting table 12 and transplanting them to soil.
In the transplanting machine provided with 13, an input shaft 16 to which the power of the prime mover is transmitted and driven to rotate, a reciprocating mechanism for reciprocating the seedling mounting table 12 left and right, and a transmission mechanism for transmitting power to the transplanting device 13 And an angular speed change mechanism 48 for changing the angular speed of the driving rotation of the transplanting device 13, wherein the reciprocating mechanism of the seedling mounting table 12 and the transplanting device 13
A power branching portion for branching and transmitting power to the power transmission mechanism, and the angular velocity transmission mechanism 48 provided on a transmission path on the transmission mechanism side to the transplantation device 13 on the lower side of transmission from the power branching portion, Further, the transplanter is characterized in that the angular speed transmission mechanism 48 is set so that the angular velocity of the driving rotation of the transplanter 13 becomes high when the transplanter 13 divides the seedling.