JPH0763257B2 - Rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a seedling retainer for preventing floating of seedlings on a seedling stand, and a seedling pressing member that acts on the bottom surface of the seedlings toward the seedling take-out port side. The present invention relates to a rice transplanter equipped with a rotating body with a protrusion to prevent the falling off of the rice seedling on the seedling stand.

[Conventional technology]

The rice transplanter is equipped with a seedling holder that holds down the seedlings so that the seedlings placed on the seedling stand do not float up from the seedling stand while the seedling stand is being driven laterally. The tool is configured to be switchable between an action posture during planting work for pressing down the seedling and an action release posture in which the seedling pressing tool is greatly lifted upward.

[Problems to be Solved by the Invention]

At the end of planting work of seedlings, when removing the seedlings remaining near the seedling take-out opening at the lower end of the seedling stand, lift the seedling retainer upward and take out the seedlings. However, in the vicinity of the seedling take-out port, the seedlings are prevented from falling toward the seedling take-out port side during lateral feeding of the seedling stand, and the seedlings are sent to the seedling take-out port side at the stroke end of the lateral feeding of the seedling take-off table. A rotating body with protrusions (wheels with protrusions, rubber belts, etc.) is provided, and the protrusions of this rotating body bite into the bottom surface of the seedlings. In some cases, it was difficult to easily remove the seedlings remaining near the outlet.

As a technique to solve this problem,
As shown in Japanese Patent Publication No. 7, a seedling retainer that prevents the seedlings from floating on the seedling stand, and a wheel with a protrusion that acts on the bottom surface of the seedlings to prevent the seedlings from slipping off toward the seedling ejection port side. The seedling holder and the wheel with protrusions are installed so that all the protrusions of the wheel with protrusions on the seedlings are released by the operation of changing the posture of the seedling holder toward the action release side of the seedling holder. A rice transplanter has been proposed which is linked with.

However, according to this technique, when the seedling retainer is operated to the seedling retainer release side (action release side), all the protrusions of the wheel with protrusions are released from the bite action, leaving the seedlings on the seedling stand. If you continue to plant seedlings by replenishing new seedlings in the state, the remaining seedlings may be crushed by the weight of the new seedlings, for example, the back of the remaining seedlings may bulge like a scale insect. However, there was a problem that it took time and effort to replenish the seedlings because the postures of the remaining seedlings had to be corrected.

The present invention was made in view of such a problem, and at the end of planting work of seedlings, it is possible to easily take out the seedlings remaining near the seedling take-out port, It is an object of the present invention to provide a rice transplanter that can smoothly supply seedlings when the seedlings are replenished by supplying new seedlings with the seedlings left on the stand.

[Means for Solving the Problems]

A feature of the present invention is that in a rice transplanter as described above, a pair of upper and lower rotating wheels arranged on the rear surface side of the seedling stand is wound around a belt having a large number of the protrusions to form the rotating body,
A support arm is provided on the rear side of the seedling stand so as to be swingable around a horizontal axis core located above the upper rotary wheel, and the horizontal axis is provided on the free end side of the swingable support arm. An engaging portion having flexibility so as to restrict the movement of the support shaft of the upper rotating wheel body in the direction along the arc around the core while allowing the support shaft to move in the direction along the radius of the arc. And a biasing force for biasing the support shaft of the upper rotary wheel body slidably engaged with and supported by the engaging portion, and for biasing the support shaft toward the side of the horizontal axis of the support arm. By providing a means, the protrusion of the surface of the belt on the seedling stand side bites into the bottom surface of the seedling, and from this acting posture, the upper rotating wheel swings downward around the lower rotating wheel. Then, the protrusions other than the protrusions located around the lower rotating ring can bite into the bottom surface of the seedling. The posture of the belt is configured to be freely switchable to the removed non-acting posture, and the posture of the belt is changed to the non-acting posture in accordance with the posture changing operation to the action releasing side of the seedling pressing tool. The seedling retainer and the swing mechanism are linked to each other, and the action and effect are as follows.

[Work]

With the configuration described above, if the seedling retainer is operated to the seedling retainer release side (action release side) at the end of the seedling planting work, the upper rotary wheel will be operated as the biasing means. It swings around the lower rotating ring body against the biasing force, and among the many protrusions of the belt, the protrusions other than the protrusions located around the lower rotating ring body are not bite into the seedling bottom. , The seedlings remaining on the seedling stand can be easily taken out.

In addition, if you continue to plant seedlings by supplying new seedlings with the seedlings left on the seedling stand, even if you operate the seedling retainer to the seedling retainer release side (action release side), Since the protrusions located around the lower rotating wheel can bite into the bottom surface of the seedling, and the protrusions that bite can support the remaining seedlings, the weight of the new seedlings causes the remaining seedlings to It is possible to prevent crushing and eliminate the posture correction work for the remaining seedlings.

If the seedling retainer is operated to the seedling retainer side (working side), the upper rotating wheel body is rotated around the lower rotating wheel body by the urging force of the urging means, which is opposite to the swinging direction at the time of the release. It is swung back in the direction.

As described above, in order to make the upper rotary wheel swingable around the lower rotary wheel, in the present invention, the upper rotary wheel engaged with the engagement portion on the free end side of the support arm. The support shaft of the body,
Since the pulling force is applied by the biasing means, the biasing means can not only return the upper rotary wheel body to the working side as described above, but also the upper rotary wheel body and the lower rotary wheel body. The belt wound around the belt can be tensioned to prevent the belt from loosening.

〔The invention's effect〕

Therefore, at the end of the planting work of the seedlings, it is possible to easily take out the seedlings remaining near the seedling take-out port, and at the same time, supply new seedlings with the seedlings left on the seedling stand. When continuing the planting work of seedlings, the work of supplying seedlings can be carried out smoothly, and furthermore, the looseness of the belt wound around the upper rotary wheel and the lower rotary wheel can be prevented to ensure reliability. You can now prevent the seedlings from slipping off.

〔Example〕

Hereinafter, a riding type rice transplanter which is an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 2, a planting arm (2) is rotatably driven at the rear of the planting mission case (1), a seedling stand (3) is slidably driven to reciprocate left and right, and a grounding and posture is maintained at the bottom. A seedling planting device is configured with a float (4) for use, and these seedling planting devices are connected to the rear part of the wheeled machine body via a four-link mechanism (5).

As shown in FIG. 1 and FIG. 2, the seedling stand (3) has a drive wheel (6) (lower rotating wheel on the lower side of the seedling stand (3) on the seedling take-out port (3a) side. An example), and a guide wheel (7) (an example of an upper rotating wheel body) is supported above this, and a conical projection serving as a rotating body (8) across both (6) and (7). The rubber belt with (8a) is wound.

A swing mechanism for vertically swinging the guide wheel (7) around the drive wheel (6) is provided for the guide wheel (7) and the drive wheel (6). As shown in the figure, the guide wheel (7) is rotatably attached to the support shaft (9) and the bracket (17) on the rear surface of the seedling stand (3).
Horizontal axis (P ₁₎ swingably supported T-shaped support arms (10) lower end engagement of the transverse axis (P ₁₎ formed to face the has been recessed groove around the The support shaft (9) is engaged with the portion (10a) from below, and the support shaft (9) is pulled upward by the biasing means (11) composed of a spring.

When the seedling stand (3) is laterally driven to the left or right, the drive wheel (6) is stopped, and the rubber belt (8) causes the seedling (A) to move to the lower seedling take-out port ( It is supported so that it does not fall toward 3a) side, and when the seedling stand (3) reaches the stroke end of lateral feed, the drive wheel (6) is driven to rotate by the set angle (clockwise in Fig. 1). The rubber belt (8) sends the seedling (A) to the seedling take-out port (3a) side.

On the other hand, the support shaft (12) is rotatably supported by the support portion (3c) provided below the partition portion (3b) for partitioning each row in the seedling stand (3), and this support is also provided. Axis (1
A rod-shaped seedling holder (13) for holding the seedling (A) of the seedling stand (3) from above is extended from 2). Then, a linking rod (15) is provided so as to span the arm (14) extended from the support shaft (12) and the support arm (10).

In the state shown by the solid line in FIG. 1, the rubber belt (8) is the seedling (A).
While contacting the bottom surface of the seedling, the seedling holder (13) holds the seedling (A).
In this state, the support arm (10) moves downward (clockwise in FIG. 1) when the seedling retainer (13) is lifted upward (clockwise in FIG. 1) from this state. The rubber belt (8) is pulled downward with the driving wheel (6) as a fulcrum.

Further, as shown in FIGS. 1 and 2, the seat (16) is rotatably supported about the longitudinal axis (P ₂ ) of the machine body within the range of 180 ° in the forward and backward directions, and the seat ( A wire (19) is wound around a support shaft (18) that rotatably supports 16),
The other end of the wire (19) is connected to the support arm (10). With the structure described above, when the seat (16) is turned rearward while the operator is seated, the wire (19) is pulled and the rubber belt (10) is pulled downward, and the seedling holder (13) is raised. It is lifted up to. In addition, the member (17
a) is a stopper that stops downward swing of the support arm (10) beyond the setting, and the spring (20) is the seat (16).
This is to accommodate the difference between the winding amount of the wire (19) and the swinging amount of the support arm (10) due to the rotation of.

[Another embodiment]

Only the rubber belt (8) may be lowered in conjunction with the rearward rotation of the seat (16).

It is to be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of the rice transplanter according to the present invention. Fig. 1 is a side view of a rubber belt and a seedling retainer in the seedling stand, and Fig. 2 is a side view of the rear half of the riding type rice transplanter. (3) …… Seedling stand, (3a) …… Seedling outlet, (6)…
… Lower rotating wheel, (7) …… Upper rotating wheel, (8)
...... Rotator with protrusions, (9) …… Support shaft, (10) ……
Support arm, (10a) …… engagement part, (11) …… biasing means, (13) …… seed presser, (A) …… seedling, (P ₁ ) ……
Horizontal axis.

Claims (1)

[Claims] 1. A seedling retainer (13) for preventing floating of the seedling (A) on the seedling stand (3), and a seedling take-out port which acts on the bottom surface of the seedling (A). A rice transplanter equipped with a rotating body (8) having a protrusion for preventing the falling off toward the (3a) side, which is provided on the rear side of the seedling stand (3). A belt having a large number of the projections is wound around a pair of rotating wheels (6) and (7) to form the rotating body (8), and an upper rotating wheel is provided on the back side of the seedling stand (3). A support arm (10) swingable about a horizontal axis core (P ₁ ) above the body (7) is provided, and the horizontal axis is provided on the free end side of the swingable support arm (10). While restricting the movement of the support shaft (9) of the upper rotating wheel body (7) in the direction along the arc around the core (P ₁ ), the support shaft (9 in the direction along the radial direction of the arc. )
Is provided with an engaging portion (10a) having flexibility to allow movement of
The support shaft (9) of the upper rotating wheel body (7) is slidably engaged with and supported by the engaging portion (10a), and
A urging means (11) for urging the support shaft (9) toward the side of the support arm (10) closer to the horizontal axis (P ₁ ) is provided so that the seedling support (3) side of the belt is provided. The action posture in which the surface protrusion bites into the bottom surface of the seedling (A), and from this action posture, the upper rotating wheel body (7) swings downward around the lower rotating wheel body (6), Of the protrusions other than the protrusions located around the rotating wheel body (6) of the seedling (A) in a non-acting position in which the bottom of the seedling (A) is released, and the posture of the belt can be switched. ) The rice transplanter in which the seedling retainer (13) and the swinging mechanism are linked so that the posture of the belt becomes the non-acting posture in accordance with the posture changing operation to the action releasing side.