JPH0224407Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention has a
This invention relates to a rice transplanter equipped with a crank-type link mechanism that drives planting claws in upward and downward circulation.

Generally, seedling planting work using a rice transplanter is carried out after filling the field with water, but there are cases where seedling planting work is carried out without filling the field with water. There was an inconvenience. In other words, since the planted seedlings are inserted into the mud surface by the planting claws, a space is formed in the mud around the culm of the planted seedlings along the trajectory of the planting claws. Moisture around the roots of the planted seedlings tends to evaporate upward from the space, which can cause the planted seedlings to wilt, and when water is poured in after planting, the planted seedlings resist the water flow. This may result in poor planting posture or floating seedlings.
In order to improve this problem, it was considered to install a soil holding arm on the machine body, but this soil holding arm is driven in front of the planting claw in synchronization with the planting claw so as not to interfere with the planted seedlings. In addition, because the planting claw drive mechanism of the rice transplanter with the configuration mentioned above is usually located further back than the planting claw, the soil holding arm can be connected from this drive mechanism. The structure is complicated in order to extract the driving force, and especially when the driving force of the soil presser arm is extracted from the crank arm, the rocking force of the crank arm swings the rod etc. that drives the soil presser arm, and it is difficult to plant. There is a problem in securing a space that allows the rod etc. to swing in a region where the mechanisms for driving the claws are concentrated, and there is also the problem that the structure becomes complicated.

The present invention was developed in view of the above-mentioned circumstances, and it is possible to improve the planting posture and state of planted seedlings by rationally and simply installing a soil holding arm in the rice transplanter having the above-mentioned configuration. The purpose is to maintain it well.

A feature of the present invention is that a soil presser arm that presses the soil against the roots of the planted seedlings is provided in the front part of the planting claw so as to be able to swing vertically, and this soil presser arm and the crank type link A swing link that swings back and forth in the mechanism is linked by a push-pull rod that operates back and forth, and its effects are as follows.

In other words, when seedlings are planted on a mud surface with little moisture in the mud, the soil holding arm presses down on the mud surface around the planted seedlings, causing the water around the roots of the planted seedlings to evaporate upward. This reduces the chance of planted seedlings wilting.
In addition, since the mud surface around the planted seedlings is pressed down, the planted seedlings are held in the mud, and even when water is poured into the field after planting, it is less likely that the planting posture will deteriorate or the seedlings will float up.

In particular, since the earth presser arm is driven by the front and rear push-pull rods connected to the swing link, the earth presser arm can be moved without making the structure too complicated or requiring a large space. It was possible to drive the machine, and it became possible to install a retainer arm without requiring major modifications.

Next, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, an engine 4 is mounted on the front part of a vehicle body frame 3 that includes a pair of left and right rear propulsion wheels 1 and a pair of left and right front propulsion wheels 2 for steering operation, and a bonnet 5 that covers the engine 4. At the front of the aircraft, there is also a boarding and operating section 7 where seats 6 are provided.
are placed in the center of the fuselage, and the bonnet 5
A transparent hood 8 made of synthetic resin is erected on the top of the boarding/driving unit 7, and a sunshade 9 is provided on the top of the boarding/driving unit 7 to cover the top surface of the boarding/driving unit 7.
It is attached to 0. Further, there is a front inclined seedling platform 11 on which pine-shaped seedlings W are placed and horizontally reciprocated with a constant stroke, and a plurality of seedlings taken out one by one from the lower end of the seedling platform 11 and planted on the mud surface. A seedling planting device A equipped with a planting claw 12 . . . and a plurality of floats 13 . The vehicles are connected to each other so that they can be raised and lowered to form a riding rice transplanter for planting multiple rows.

As shown in FIGS. 1 and 2, the seedling rest 11 is arranged so as to increase the amount of seedlings placed on the seedling rest 11.
The upper part 11a of the seedling rack 11 is configured to be expandable and retractable in the vertical direction of the seedling rack, and furthermore, when the amount of seedlings to be placed is increased, the upper part 11a of the seedling rack 11 is lowered as the number of seedlings decreases. The visibility to the rear of the machine from 7 is improved, and the seedlings can be easily placed on the seedling stand 11. The upper part 11a of the seedling stand 11 is provided with protrusions 11b that engage with the back surface of the placed seedlings W, as described above.
The structure is such that it descends as the temperature decreases.

Further, as shown in FIGS. 3 and 4, the planting claws 12 are located below the seedling stand 11 and below the float 13.
It is attached to the front end of a planting arm 18 that is driven by a crank arm 17 of a crankshaft 16 that protrudes from the side of a transmission case 15 that is arranged to be located above, and is attached to the front end of a planting arm 18 that is driven by a driving trajectory of a planting claw 12. By arranging the swinging link 19 that sets and adjusts the position between the rear end of the planting arm 18 and the rear end of the transmission case 15, the drive locus of the planting claw 12 can be extended to the length shown by S in the figure. It is set in a circle. The crankshaft 16, crank arm 17, and swing link 19 are collectively referred to as a crank mechanism B.

In addition, in the front part of the planting claw 12, a plurality of earth holding arms 20 are arranged in a cantilevered manner toward the rear, and are arranged so as to be swingable around the horizontal axis in the left-right direction of the machine. An arm 21 is fixedly attached to the pivot of the earth holding arm 20, and a rod 22 is disposed between the arm 21 and the swing link 19, so that the swing link 19 can be moved back and forth. The earth presser arm 20 is moved up and down by pushing and pulling the rod 22. The soil retaining arm 20 is made of a pair of left and right aguru materials with flattened tips, and swings downward at approximately the same time as the planting claws 12 plant the seedlings in the mud. It has the function of pressing down the mud surface on both the left and right sides of the seedling.

Further, to explain the movement of the earth presser arm 20 in detail, the push/pull rod 22 can be pushed/pull driven via a rod 22a pivotally connected to a swinging link 19 that swings back and forth, and a spring 23 at its tip. It consists of another rod 22b attached to. The rod 22b is pivotally connected to the arm 21 of a swing shaft 24 supported by the transmission case 15, and a pair of right and left earth holding arms 20 are attached to the swing shaft 24 in a cantilevered manner in a backward downward tilting position. are fixed by welding, and the rod 22a is tension-driven by the backward swinging of the swing link 19, and the spring 23 and the rod 22a are
(b) The earth presser arm 20 is driven and swung downward via the arm 21, and the downward oscillation is stopped at the position where the arm 21 abuts a stopper 25 protruding from the transmission case 15. The extra swinging motion of the swinging link 19 is absorbed by the spring 23, and the forward swinging of the swinging link 19 drives the earth presser arm 20 upwardly. There is.

The amount of downward swinging of the earth retainer arm 20, that is, the amount of earth retainer arm 20, can be adjusted by changing the threading depth of the bolt serving as the stopper 25.

Further, in the figure, 26 is a length adjustment mechanism for the rod 22a, and 27 is a long hole for adjusting the push/pull stroke amount of the rod 22.

[Brief explanation of drawings]

The drawings show an embodiment of the rice transplanter according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a longitudinal side view of the upper part of the seedling stand, Fig. 3 is a side view of the seedling planting device, and Fig. 4. is a rear view of the earth presser arm. 11... Seedling stand, 12... Planting claw, 19...
Swing link, 20... earth presser arm, 22... push/pull rod, B... link mechanism.

Claims (1)

[Scope of utility model registration request] A crank-type link mechanism B that drives the planting claws 12 in vertical circulation is provided at the lower rear side of the front-sloping seedling stand 11.
The rice transplanter is equipped with a soil holding arm 20 that presses soil against the roots of the planted seedlings in front of the planting claw 12, and is swingable up and down.
In this rice transplanter, this soil holding arm 20 and a swing link 19 that swings back and forth in the crank type link mechanism B are linked by a push/pull rod 22 that operates in the front and back direction.