JPH0681564B2 - Seedling structure of rice transplanter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a seedling stand of a rice transplanter, and more particularly to mounting of a vertical seedling feeding mechanism and a posture changing structure thereof.

[Conventional technology]

The seedling vertical feed mechanism in the current rice transplanters holds the seedlings so that they do not drop downward while the seedling stand is being driven horizontally, and when the seedling stand reaches the end of the horizontal feed stroke, the seedling is set downward only by the stroke. It has a feeding function, and there is a wide belt with a protrusion or a star wheel.

[Problems to be Solved by the Invention]

As mentioned above, it is necessary to have a protrusion that fits into the back of the seedling.
It is effective because the seedlings can be retained during horizontal feeding and vertical feeding at the stroke end of horizontal feeding can be reliably performed, but when the seedlings on the seedling stand are low, new seedlings are slid in from above the seedling stand. In the case where the seedlings are applied, for example, if the protrusions of the belt are exposed on the seedling surface, the seedlings may be caught by these protrusions and the seedlings may not be fed downward.

Therefore, the seedling vertical feeding mechanism can be switched between the first posture that is out of the seedling placing surface and the second posture that is pulled downward, and is attached to the seedling placing table while being biased toward the first posture side, The switching lever provided on the upper part of the stand and the posture switching portion of the vertical feeding mechanism are connected by a wire, and the seedling vertical feeding mechanism is pulled to the second posture side by pulling the wire by the switching lever. It has been proposed to make it easier to slide in from above.

However, in order for the seedling vertical feed mechanism to support the weight of the seedlings in the first posture, the biasing force toward the first posture must be set relatively strong, and the seedling stand itself is made of a light resin. Since the strength is comparatively low, if the wire is operated against the biasing force by the switching lever, the seedling stand may bend along the wire direction due to the reaction force from the biasing force. .

Here, the present invention has been made by paying attention to the above-mentioned situation, and an object thereof is to prevent the deflection phenomenon of the seedling stand during the posture changing operation of the seedling vertical feeding mechanism.

[Means for Solving the Problems]

A feature of the present invention is that, in a seedling rest structure of a rice transplanter such as an abnormality, it is possible to switch between a first posture in which the seedling rest surface is opened above and a second posture in which the seed posture is pulled downward, and the first posture. The seedling vertical feeding mechanism is attached to the seedling placing table while being urged to the side, and the inner wire of the release wire is erected and connected between the switching lever provided on the upper part of the seedling placing table and the posture changing part of the seedling longitudinal feeding mechanism. Then, the support frame is installed over the support parts on both ends of the outer wire of the release wire, with the support frame being inserted into the partition convex part of the seedling stand, and the seedling vertical feed mechanism is operated by operating the switching lever to the inner wire pulling side. Are linked so as to be operated to the second posture side, and the action and effect are as follows.

[Action]

With the configuration described above, when the switching lever is operated to the inner wire pulling side to operate the seedling vertical feeding mechanism to the second posture side, the reaction force from the posture switching portion of the seedling vertical feeding mechanism causes the outer wire ends of the outer wire to move. Even if the support parts come close to each other, they are supported by the support frame.

Further, since the support frame is arranged so as to enter the partitioning convex portion of the seedling stand, the support frame does not interfere with lateral feeding drive of the seedling stand.

〔The invention's effect〕

As described above, by effectively utilizing the partitioning protrusions of the existing seedling stand, the deflection phenomenon of the seedling stand can be prevented without interfering with the lateral feeding drive of the seedling stand. I was able to do it.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings using a riding type rice transplanter which is one of the rice transplanters.

As shown in FIG. 7, a planting case (31) is provided which is rotationally driven around the horizontal axis (P ₁ ) of the transmission case (14) extended rearward from the planting mission (1), The planting arms (2) are pivotally supported on both ends of the planting case (31),
A seedling planting device of a four-row planting type rice transplanter is configured by including a seedling stand (4) which is reciprocally laterally driven on the guide rail (3) of the planting mission (1).

The lateral feed drive structure of the seedling stand (4) will be described in detail. As shown in FIGS. 5 and 7, one lateral feed shaft (5) projects from the left and right of the planting mission (1). A support member (6) for the seedling stand (4) is connected to the left and right of the transverse feed shaft (5). A reinforcing member (7) is erected and connected across both upper ends of the support member (6) and is swingably connected around the horizontal axis (P ₂ ) at the lower end of the support member (6). An arm (8) is attached, and this connecting arm (8) is attached to the rear surface of the seedling stand (4). With the above-mentioned structure, the seedling placing table (4) is slid on the guide rail (3) by laterally driving the entire lateral feeding shaft (5) left and right.

Next, the structure of the longitudinal feeding of the mat-shaped seedlings (A) on the seedling placing table (4) will be described in detail. As shown in FIGS. One hexagonal shaft (15) is rotatably supported, and a pair of drive rollers (9) is provided for one planting row of the seedling stand (4). This drive roller (9) Is loosely fitted onto the hexagonal shaft (15). The pair of drive rollers (9) are connected to each other by a first connecting member (10) which is cylindrical and freely rotatable with respect to the hexagonal shaft (15), and the left and right two
The drive rollers (9) are connected to each other by a second connecting member (22) similar to the first connecting member (10) in the pair of planting members, and the drive roller (9) and the hexagonal shaft (15) are connected to the bracket ( It is rotatably supported on the back of the seedling stand (4) via 11). Further, a driven roller (12) and an auxiliary roller (23) are arranged above the drive roller (9), and a feed belt with a rubber protrusion as a seedling longitudinal feed mechanism (13) is wound around them. Is there.

Next, the structure for switching the feeding belt (13) between the first posture in which the feeding belt (13) is raised above the opening of the seedling placing surface and the second posture in which the feeding belt (13) is pulled downward will be described in detail, as shown in FIGS. 1 and 7. Horizontal axis of bracket (33) of seedling stand (4) (P ₅ )
A support arm serving as a posture switching unit (34) is pivotally supported around the support arm (34), and a driven roller (12) is rotatably supported at a lower end of the support arm (34) to ensure a sufficient initial tension. The driven roller (12) is lifted upward by the given spring (35).

On the other hand, the bracket (36) above the seedling stand (4)
With the horizontal axis (P ₆₎ swingably switching lever around (37) is pivotally supported in both ends both brackets of the outer wire (38a) of the release wire (38) (33), in (36) The inner wire (38) of the release wire (38)
b) is connected between the arm (34a) of the support arm (34) and the switching lever (37). And the first
As shown in FIG. 2 and FIG. 2, the support frame (39) is erected on both brackets (33) and (36) in a state that the support frame (39) is inserted into the partitioning protrusion (4a) of the seedling stand (4). As shown in FIGS. 1 and 3, the support frame (39) is attached to the upper bracket (36) by bolt connection, and is inserted into the lower bracket (33).

The state shown in FIG. 1 is the first posture in which the feed belt (13) is protruded upward from the opening of the seedling placing surface, and when the switching lever (37) is operated to swing upward, as shown in FIG. The inner wire (38b) is pulled toward the switching lever (37), and the driven roller (12) is pulled toward the left side in FIG. 4 by the support arm (34). When the driven roller (12) is pulled in this way, the driven roller (12) is pulled down by the tension of the feed belt (13), so the spring (35) is stretched and the spring (35) is attached. The supporting arm (34) tries to return to the state shown in FIG. 1 due to the force.

When the seedling stand (4) reaches the stroke end of the lateral feed, the hexagonal shaft (15) is rotated by a set angle. If the structure is described in detail, as shown in FIG. The first rotating shaft (17) is laid across (6), one end of the first rotating shaft (17) is extended to near the end of the seedling stand (4), and this extended side is The pipe member (24) fixed to the support member (6) is supported, and the support arm (25) is attached to the hexagonal shaft (15) from the pipe member (24).
Is erected.

A rod (19) is provided so as to extend from the first arm (17a) at the extension side end of the first rotation shaft (17) and the drive unit (18) of the hexagonal shaft (15). The drive part (18) is externally fitted to the hexagonal shaft (15) and internally has a one-way clutch which allows only the downward rotation of the hexagonal shaft (15) and the feed belt (13) to the seedling feeding side. Has been done.

As shown in the figure, crank arms (20) are provided on both sides of the planting mission (1), which are rotatably driven in conjunction with the lateral feed of the seedling stand (4). ) Reaches one stroke end of the lateral feed, the crank arm (20) causes the second arm (17) of the first rotating shaft (17).
It comes in contact with b) from below and pushes it up, so that the first rotating shaft (17), the first arm (17a), the rod (19), and the drive section (1
The hexagonal shaft (15) is rotated by a set angle via 8),
This rotational power is transmitted to the drive roller (9) via a vertical feed clutch (16) described later, and the mat belt (A) of the seedling stand (4) is moved downward (guide rail) by the feed belt (13). It is sent to (3) side).

Next, the vertical feed clutch (16) will be described in detail. As shown in FIG. 5, the shift member (2) is provided at the center of the hexagonal shaft (15).
1) is attached integrally with the hexagonal shaft (15) and is slidable in the axial direction, and when the shift member (21) is positioned in the center as shown in FIG. 5, the shift member (21 ) Engages with both the occlusal portions (9a) of the left and right drive rollers (9), and all the drive rollers (9) rotate together with the hexagonal shaft (15). And the shift member (21)
When the slide member is operated to the right or left, the shift member (21) is separated from the occlusal portion (9a) of the other drive roller (9), and the shift member (21) is engaged with the two strips on the side in which the shift member (21) is engaged. The drive roller (9) rotates together with the hexagonal shaft (15),
The other two drive rollers (9) are stopped. Further, as shown in FIG. 6, the occlusal portion (9a) is attached to the drive roller (9) by an oval fitting structure in which both sides of the cylinder are cut out.

Next, the operation structure of the longitudinal feed clutch (16) will be described in detail. As shown in FIG. 5, the actuation of the right-side two-row or left-side two-row planting case (31) and planting arm (2) is stopped. Changeover lever (2) for operating each clutch (not shown)
6) and a balance arm (28) swingably around the shaft core (P ₃ ) in the lever guide (27) of the switching lever (26). On the other hand, the shift arm (29) that slides the shift member (21) in the vertical feed clutch (16) is swingably supported around the axis (P ₄ ), and the arm of the balance arm (28) ( A pair of wires (30a) and (30b) are laid across 28a) and the shift arm (29), and a neutral return spring (32) is attached to the shift arm (29).

With the above structure, if the switching lever (26) is engaged and fixed at the central position of the lever guide (27), the switching lever (26) is engaged in the concave portion (28b) of the balance arm (28) and the balance. The arm (28) will also be fixed in the neutral state, and the vertical feed clutch (16) will be in the state as shown in FIG. It will be sent.

Then, when the switching lever (26) is engaged and fixed at, for example, the (R-OFF) position, the right side two-row planting case (31) and the planting arm (2) stop, and the switching lever (26).
Causes the balance arm (28) to swing and one wire (30a) to be pulled, so that the shift member (21) of the vertical feed clutch (16) is on the right side with two stops (left side in FIG. 5).
The slide operation is performed.

It should 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 seedling stand structure of the rice transplanter according to the present invention, and FIG. 1 shows the association between the feed belt and the switching lever in the first posture in which the feed belt is above the opening of the seedling placement surface. FIG. 2 is a vertical sectional side view showing the structure, FIG. 2 is a cross-sectional arrow view from the II-II direction in FIG. 1, FIG. 3 is an enlarged view showing the connecting structure of the support frame and the lower bracket, and FIG. FIG. 5 is a vertical cross-sectional side view of the vicinity of the feed belt showing a state in which the feed belt is pulled downward from the state shown in the figure, and FIG. 5 is a transverse feed structure of the seedling stand, a drive structure with the feed bell, and a vertical feed clutch. FIG. 6 is a cross-sectional plan view showing the structure of FIG. 6, FIG. 6 is a sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is an overall side view of the seedling planting device. (4) ...... Seedling support, (4a) ...... Seedling support partition projections, (13) ...... Seedling vertical feed mechanism, (34) ...... Seedling vertical feed mechanism posture switching unit, (38) ...... Release wire, (38a) ...
Outer wire of release wire, (38b) Inner wire of release wire, (33), (36) Supports at both ends of outer wire, (37) Switching lever, (3
9) …… Support frame.

Claims (1)

[Claims] 1. A seedling longitudinal feed mechanism (13) which can be switched between a first posture in which the seedlings are placed above the opening of the placing surface and a second posture in which the seedlings are pulled downward and which is biased toward the first posture. ) Is attached to the seedling stand (4), and a release wire (37) is provided between the switching lever (37) provided on the upper part of the seedling stand (4) and the posture switching section (34) of the vertical seedling feeding mechanism (13). The inner wire (38b) of 38) is erected and connected, and the release wire (38)
Support parts (33), (36) at both ends of the outer wire (38a) of
Spanning the support frame (39) into the partition projection (4a) of the seedling stand (4), and operating the switching lever (37) toward the inner wire (38b) pulling side. The seedling stand structure of the rice transplanter is linked so that the seedling vertical feed mechanism (13) is operated by the second posture.