JPS6142335Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a rice transplanter that uses a rice transplanter that has a structure in which multiple planting rods rotate in the same phase, but which minimizes vibrations when the movable claws push out the seedlings. This relates to an attached device.

The planting rod in a rice transplanter generally moves up and down in a predetermined rotational trajectory, divides and clamps the seedlings near the top dead center of the rotational trajectory, and pushes the clamped seedlings into the mud at approximately the bottom dead center position. However, it is becoming easier to plant
The above rotation trajectory is not a perfect circular trajectory, but a deformed elliptical trajectory that is long in the vertical direction, so the seedling planting position,
That is, in the lower part of the rotation trajectory, the rotation speed of the planting rod suddenly decreases, and uneven rotation is likely to occur. In addition, even though the speed of the planting rod changes rapidly, the movable claw starts to move in the direction of pushing out the seedlings against the spring at exactly the same time, so the phase and planting time of each planting rod are the same. If so, the synergistic effect of these effects would cause considerable unevenness in the rotation of each planting rod, resulting in a jerky phenomenon, and increased vibration, contributing to a significant deterioration in planting performance. Furthermore, if the rotational speed is increased in order to improve work efficiency, the above-mentioned disadvantages will be doubled, resulting in a drawback that the planting accuracy will be adversely affected.

The present invention was developed to solve the above-mentioned drawbacks, and although each planting rod moves up and down in the same phase, the timing at which the movable claws push the seedlings into the mud is slightly shifted. By configuring it to do so, it is possible to temporally disperse the reaction and impact caused by the operation of the movable claws, and to prevent uneven rotation and vibration of the planting rod caused by concentrated operation of the movable claws as much as possible. , a rice transplanter that can reliably transport and plant separated seedlings to the planting position in the mud, thereby increasing the precision of planting, increasing the work speed, and greatly increasing efficiency. The purpose is to provide a seedling planting device.

To explain the structure of the present invention with reference to an embodiment shown in the drawings, in FIG. It is installed so that it can be raised and lowered and rolled.

Reference numeral 2 denotes a seedling stand, and the seedling stand 2 is installed via a stay 3 so as to be tilted forward and to be able to reciprocate from side to side. 4 is a float that slides on the rice field while supporting the planting area A by its buoyancy. Reference numeral 5 denotes a transmission case that constitutes a part of the body frame of the planting section A, and a transmission device is built inside, and the transmission case 5 rotates around a shaft 5a passing through both left and right rear sides of the transmission case 5. Planting rods 8 and 8' are attached to the left and right sides of the shaft 5a via a crank arm 6 and a swing arm 7 so as to be vertically movable. Also, the planting rod 8, 8'
A fixed claw 9 for separating and holding the seedlings and a movable claw 10 for pushing the clamped seedlings into the mud at the planting position are attached to the tip of the seedling. Due to the related movement of the crank arm 6 and the swing arm 7, the planting rods 8, 8' move up and down in a deformed elliptical trajectory P as shown in FIG. Seedlings are scraped off one by one from the pine seedlings (not shown) on the platform 2 and successively planted on the rice field. That is, a single transmission system within the transmission case 5 causes the left and right planting rods 8, 8' to move up and down in the same phase. 11 is movable claw 1
This operating rod 11 is attached through a sealing member 11a and a bush 11b so as to be able to move forward and backward in the direction of the arrow in FIG. It's encouraging. Reference numeral 13 denotes a swinging arm that is vertically swingably supported within the planting rods 8, 8' via a fulcrum shaft 13a, the tip of which engages with the upper recess 11c of the actuating rod 11, and the base end of which engages with the cam body 14. ,14'
It is in sliding contact with the outer peripheral surface of. Also, the cam body 14,1
4' is fixed to a transmission shaft 6a provided at the rotating tip side of the crank arm 6, and rotates in synchronization with the planting rods 8, 8'. and cam body 1
The outer peripheral surfaces of 4 and 14' are an eccentric part 14a and a perfectly circular part 14.
b and protrusions 14c and 14'c,
When the base end of the swing arm 7 comes into sliding contact with the protrusions 14c, 14'c of the cam bodies 14, 14', the tip of the arm rotates downward about the fulcrum shaft 13a, causing the operation rod 11 and movable pawl 10 to rotate downward. is pushed down against the spring 12 to push out the seedlings held by the fixed claws 9 into the mud, but in the present invention, the timing of pushing out the seedlings of each planting rod 8, 8' is slightly shifted. It is configured as follows.

That is, in this embodiment, the protrusions 14 of the cam bodies 14, 14' that are pivotally supported within the planting rods 8, 8', respectively.
c and 14'c are provided in a slightly phase-shifted state as shown in FIG.
8' rotation trajectory P near the bottom dead center a,
It is now possible to be sorted into category b.

In addition, in Fig. 1, the rotation locus P of the planting rods 8, 8'
The large number of points shown in FIG. 2 represent changes in the rotational speed of the planting rods 8, 8'.

Next, the operation of the present invention will be explained. During the planting rod work, the planting rods 8, 8' move up and down while drawing a modified elliptical locus P shown in FIG. Immediately after the planting rods 8, 8' start from the upward stroke to the downward stroke, the fixed claws 9 scrape off the pine seedlings (not shown) placed on the seedling stand 2 one by one. After the planted seedlings are held by the fixed claws 9 and carried to the planting position shown in the drawing, the actuating rod 11 moves the cam bodies 14, 1
4' and the swinging arm 13 against the spring 12, the movable claw 10 advances and descends, pushing out the clamped seedling into the mud and planting it.

In this case, as shown in Fig. 1, the tips of the planting rods 8, 8' move up and down not in a perfect circular trajectory but in a deformed elliptical trajectory P that is long in the vertical direction. Near the dead center, the rotational speed of the planting rods 8, 8' suddenly changes and becomes slow, and if the movable claws 10, 10 of the planting rods 8, 8' are operated at the same time at this point, the rotation will occur due to the reaction. This promotes unevenness and generates large vibrations, but in the present invention, the protrusions 14c, 14'c of the cam bodies 14, 14' corresponding to the pair of left and right planting rods 8, 8' rotated by a single transmission system. Third
As shown in the figure, since the phases are set to be slightly shifted, the seedling extrusion timing by the movable claws 10, 10 is distributed to front and back a, b of the bottom dead center of the trajectory P, and therefore the cam bodies 14, 14' The point at which the contact pressure becomes high is slightly shifted, and the impact caused by seedling extrusion is dispersed. As a result, the impact is halved, and rapid uneven rotation of the planting rods 8, 8' is prevented as much as possible, and large vibrations are also prevented from being exerted on the planting rods 8, 8'. It is possible to reliably plant the seedlings, and there is no occurrence of dropped seedlings, fallen seedlings, floating seedlings, etc., and the accuracy of planting can be greatly improved.

As described above, the present invention is a rice transplanter in which seedlings are planted by rotating a plurality of planting rods in the vertical direction in the same phase, in which the tip of each of the planting rods performs a splitting action to hold the seedlings. A fixed claw and a movable claw for pushing out seedlings are installed, and the movable claws on each planting rod are configured to operate at different timings for pushing out seedlings, so each planting rod can move up and down in the same phase. Although it rotates, it disperses the reaction and shock caused by the operation of the movable claw to push out the seedlings over time, and prevents as much as possible uneven rotation and vibration of the planting rod caused by the concentrated operation of the movable claw. This makes it possible to reliably transport the planted seedlings to the planting position in the mud and plant them, without causing the occurrence of dropped seedlings, tumbling seedlings, floating seedlings, etc., and greatly increasing the accuracy of planting. Not only is this possible, but by shifting the seedling extrusion timing of the movable claws in each planting rod, the rotational speed of the planting rod (and each part of the planting section) can be increased without aggravating the rotational unevenness and vibration described above. , can increase work speed and greatly improve efficiency,
Furthermore, in order to prevent uneven rotation of the planting rods, a special brake mechanism is not provided in the rotation drive section of the planting rods, and the seedling extrusion timing of each planting rod is simply slightly changed without providing any other parts. Since the intended purpose can be achieved, the aircraft does not become unnecessarily heavy or complicated, and has extremely useful practical effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
Fig. 1 is an overall side view of the present invention, Fig. 2 is a plan view of the main part, and Fig. 3 is a longitudinal sectional side view of the main part. In the figure, 8 and 8' are planting rods, 9 is a fixed claw, and 10 is a movable claw.

Claims (1)

[Scope of utility model registration request] In a rice transplanter in which seedlings are planted by rotating a plurality of planting rods in the vertical direction in the same phase, each of the planting rods has a fixed claw at the tip that performs a splitting action to hold the seedlings, and a seedling pushing action. 1. A seedling planting device for a rice transplanter, characterized in that a movable claw is attached to the rice transplanter, and the movable claws on each planting rod are configured to operate with staggered seedling extrusion timings.