JPH0242910A - Rice transplanter seedling planting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for moving seedlings back and forth in the lateral direction, and removing the seedlings from the lower edge of the mat-like seedlings placed on the seedlings rest. A rice planting system that is equipped with a planting mechanism that cuts out each plant one by one and plants them in the field, and a vertical feeding mechanism that sends the mat-like seedlings placed on it downward by a predetermined amount each time the seedling platform reaches the end of its horizontal stroke. The present invention relates to a seedling planting device of a machine, and specifically relates to an improvement of a vertical feeding mechanism.

[Conventional technology]

As a conventional vertical feed mechanism, Utility Model 56-73227
To take the example shown in the publication, in the vertical feed mechanism of this reference, a contact piece that constantly rotates is provided on the transmission case that transmits power to the seedling planting system, and the seedling stand reaches the stroke end. For each, an arm that is swing-operated by contact with this abutment piece is provided in a state in which it is interlocked with a wheel for feeding seedlings.

[Problem to be solved by the invention]

However, in the structure of the above-mentioned reference, since the contact piece and the arm make contact to send the seedlings within a short time when the seedling stand reaches the stroph end, precision is required, and at the same time, The required amount of seedling feeding may not be achieved due to wear due to long-term use or due to increased backlash in the pivot portion.

Therefore, it is conceivable to configure a vertical feed mechanism by combining a switch that detects when the seedling stand has reached the stroke end and an electric motor, but it would be possible to obtain the same driving force as the conventional vertical feed mechanism. This would require a relatively large electric motor, and if the electric motor was used to feed the seedlings, a stepping motor would be used as the electric motor, and a dedicated control device would also be required, which would be difficult to implement. becomes.

In addition, the conventional vertical feeding mechanism feeds the seedlings by a predetermined amount only when the seedling tray reaches the stroke end. When feeding the mat-shaped seedlings to the bottom of the seedling stand, it may not be possible to feed the mat-like seedlings to the bottom of the seedling stand because the vertical feeding mechanism will block the feeding.

Through rational improvements, the present invention ensures the necessary amount of seedling feed even after long-term use, and even when the mat-shaped seedlings are fed by sliding them from the top of the seedling tray, the mat-shaped seedlings can be placed on the seedling tray. The purpose is to configure a vertical feed mechanism as simply as possible that can feed the table to the lower end of the table.

[Means to solve the problem]

A feature of the present invention is that a reciprocating actuator is provided to drive the vertical feeding mechanism, and each time the seedling tray reaches the stroke end, this actuator is operated reciprocally once, and the seedling tray is The actuator is provided with a control means capable of continuously reciprocating the actuator at a position before reaching the stroke end, and its functions and effects are as follows.

[For production]

If the above characteristics are configured as shown in FIGS. 1 and 2, for example, when the seedling stand (8) reaches the stroke end, the limit switch (29) is operated and the actuator (
16) will operate in one reciprocation.

In other words, since the vertical feed mechanism (12) is driven by one reciprocating operation of the reciprocating actuator (16), for example, even if the pressure of the hydraulic oil supplied to this actuator (14) is reduced, The feeding mechanism (12) will feed the seedlings by a predetermined amount.

Moreover, by continuous reciprocating operation of the actuator (14),
It becomes possible to send the mat-like seedlings (W) downward as much as necessary even when not in operation.

〔Effect of the invention〕

Therefore, by providing a reciprocating actuator and a control means, the required amount of seedling feeding can be ensured even after long-term use, and even when mat-shaped seedlings are fed by sliding them from the top of the seedling stand. A vertical feeding mechanism capable of feeding adult seedlings to the lower end of the seedling stand was constructed relatively easily.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

As shown in Fig. 5, a seedling planting device (A) is connected to the rear end of a traveling body (2) having a driver's seat (1) via a link mechanism (4) that moves up and down by the drive of a hydraulic cylinder (3). are connected to form a riding-type rice transplanter. .

The seedling planting device (A) consists of a transmission case (5) to which power is transmitted from the traveling body (2), three chain cases (6) to which power is transmitted from the transmission cases (5), and these chains. Case (6) A rotating case (7a) provided on each side member, a planting mechanism (7) having a planting arm (7b), a seedling stand for six rows (8), and three It consists of a soil leveling float (9) and a seedling stand (
8) is provided with a spare seedling supply device (B).

As shown in FIG. 2, at the left and right positions of the transmission case (5), there are movable frames (10 ) is arranged, the movable frame (10) and the seedling stand (8) are connected, and the seedling stand (8) is supported so as to be slidable laterally on the sliding rail (11). By doing so, the seedling stand (8) reciprocates in the lateral direction during work.

As shown in the figure, the seedling stand (8) has upper and lower wheels (1
2a) and (12b) are provided with a vertical feeding mechanism (12) formed by winding a belt with protrusions (12C), and a hexagonal shaft ( 13) via a ratchet mechanism (14), and a small single-acting cylinder (16).
By engaging the rack part (16b) of the piston (16a) of (an example of an actuator),
The vertical feed mechanism (12) is configured to feed the mat-shaped seedlings (W) placed on the seedling stand (8) downward by a predetermined amount by driving a single-acting cylinder (16).

Note that this single-acting cylinder (16) is provided one for each two-row planting system, so a total of three seedling stands (8) are provided, and the restoring operation is performed by the cylinder inside the cylinder. This is done using a coil spring (16c).

As shown in Figure 2, the spare seedling supply device (B) is integrally attached to the upper part of the seedling stand (8), and a maximum of three mat-shaped seedlings (W) are stored at each planting stage. Seedling scooping board (17
), it can be held in the vertical position, and is configured to automatically replenish seedlings during work.

To give an overview of this spare seedling supply device (B), the lowermost seedling holder (SO) has front and rear wheels (18a) that operate in synchronization with the vertical feeding mechanism (12).

A seedling feeding mechanism (18) consisting of (18b) and (18c) is provided, and a seedling holding part (Sl) in the middle stage is provided.
includes a first swinging member (19) supported swingably around a horizontal first axis (P,);
) is provided with a first solenoid (20) for regulating and releasing the downward swing of the upper seedling holder (S).
Similarly to the middle stage, 2) also includes a second swinging member (21) supported swingably around the second axis (P2), and a second member (2).
1) The second part that controls and releases the downward swing.
Solenoids (22) are provided, and the first and second swing members (19) and (21) support the mat-shaped seedlings (tll) together with the seedling scooping plate (17).

As shown in Fig. 2, a roller (23) is arranged between the upper part of the seedling stand (8) and the preliminary seedling supply device (B), and the wheel (23) at the upper part of the vertical feeding mechanism (12) 12a), the roller (23), and the wheel (18b) at the rear of the seedling feeding mechanism (18) are interlocked by a chain (24) wound around a sprocket provided in each. In addition, as shown in Fig. 3, the seedling scooping board (17) has
An opening (17a) is formed through which the bell (18c) of the seedling feeding mechanism (18) is inserted.

As shown in Fig. 2, the first switch, which can be turned ON by contact with the mat-shaped seedling (W), is located at a position overlapping the roller (23) and a position overlapping the vertical feed mechanism (12) when viewed from the side. (Svll) and a second switch (SW2), and as shown in FIG.
(an example of a control means), and this control means (26) is operated by a signal from a start switch (SWO), the first and second switches (SWI), and (Svll2). is formed.

Moreover, in this seedling planting device (A), the first and second switches (S
WI), (SW2) The distance between each detection position is set slightly larger than the -branch of the mat-like seedling (W).
Feeding of mat-shaped seedlings (W) to the seedling stand (8) before the start of work by the control means (26) is performed as follows.

In other words, when the start switch (SWO) is turned ON with the mat-shaped seedling (W) placed on the seedling holder (S,) as shown in Figure 4 (A), the solenoid valve (25
) continues to operate the seedling feeding mechanism (18) by continuous intermittent operation. Incidentally, this state is expressed as shown in FIG. 4 (b).

Next, as shown in Fig. 4 (c), when the mat-shaped seedling (W) reaches the position where the first switch (SWI) is switched to the FF state, the feeding operation is stopped and the seedling holder (So) Place the seedlings on the mat-shaped seedlings (W) on the seedling holder (SO).
) is placed artificially, the first switch (Sl'll
) detects that the seedling is placed, and the control means (26) operates the seedling feeding mechanism (18) again.

Next, as shown in Figure 4 (d), the mat-shaped seedlings (W) are
When the switch (SW2) is turned OH2, the feed operation is temporarily stopped and the operator presses the start switch (SpI[1).
By turning on the solenoid valve (25) again, the solenoid valve (25) is operated intermittently a preset number of times to send the mat-like seedling (W) downward by a distance (D) shown in FIG. 4(d) and then stop. The state in which the seedlings are sent in this way is shown in FIG. 4 (e), and when this state is reached, the seedling planting operation becomes possible.

By the way, during the seedling planting process, mat-shaped seedlings Q'l)
When the first switch (SWI) is switched to the OFF state as shown in FIG. 4(c) as the When the restriction is released by operation, the first swinging member (19) or the second swinging member (21) swings downward by its own weight, and the upper end of the mat-shaped seedling (W) of the seedling stand (8) The mat-shaped seedlings (1'i) can be automatically supplied from the preliminary seedling supply device (B) so that the mat-shaped seedlings (1'i) are in close contact with the seedlings.

In addition, in order to ensure that the mat-shaped seedlings (νj) from the seedling feeding mechanism (18) of the preliminary seedling supply device (B) are sent to the seedling stand (8), the seedling feeding mechanism is adjusted as shown in FIG. 4 (B). At a timing before the mat-shaped seedling (W) is separated from the belt of the mechanism (18), the bell of the vertical feeding mechanism (12) (12c)
The distance between the mat-like seedlings (W) is set so that the mat-like seedlings (W) come into contact with each other.

The vertical feeding mechanism (12) is originally operated every time the seedling platform (8) reaches the left and right stroke ends to feed the matted seedlings (1!I) downward. As shown in FIGS. 1 and 2, the structure for this purpose is a pin (27a) of a constantly rotating crank arm (27) placed on the left and right sides of the transmission case (5), and the movable frame (10). An arm (28) pivotally supported on the arm (28) and a limit switch (
29) and a one-shot multi-by-break (30) that outputs an ON signal for a preset time using the signal from this limit switch (29), and the seedling stand (8) is placed at the left and right stroke ends. When the pin (
Since the arm (28) swings due to the contact of the pie break (30), the solenoid valve (25)
) is operated so that pressure oil from the hydraulic pump (31) is sent to each single-acting cylinder (16).

In addition, in this vertical feed system, as shown in Figure 1, three single-acting cylinders (16) are provided in parallel by a branch of a single oil passage (33), so during operation, the pressure oil is under no load. The single-acting cylinder (16) on the lighter side of
) Even if there is a difference in the amount of seedlings removed, matted seedlings (W)
can be sent easily. Furthermore, a relief valve (34) provided in the oil path (33) from the hydraulic pump (31)
), the relief pressure of the mat-like seedling (W) is determined by the sliding rail (1
1) is set to such an extent that an excessive load is not applied to the mat-like seedling (W) even when it is in contact with the mat-like seedling (W).

[Another example]

In addition to the embodiments described above, the present invention also includes, for example, as shown in FIG. 6, a limit switch (29) for detecting the actuation timing of the vertical feed mechanism (12) is arranged so as to be in direct contact with the moving frame (10). It's okay.

Further, the present invention can be implemented in various ways, such as by constructing the actuator of the vertical feed mechanism with an electromagnetic solenoid, and by equipping the control means with a microprocessor, or with elements such as logic gates and comparators.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the seedling planting device of the rice transplanter according to the present invention, FIG. 1 is a diagram showing the control system and drive system of the vertical feed mechanism, and FIG. 2 is a diagram showing the seedling planting device and the preliminary seedling supply device. Partially cutaway side view, Figure 3 is a plan view of the seedling scooping board, Figures 4 (a) and (b)
, (c), (d), and (e) are side views showing the continuous operation of feeding seedlings before the start of work, Fig. 4 (f) is a side view showing the operation of replenishing seedlings during the work, and Fig. 5 6 is a side view of the rear part of the rice transplanter, and FIG. 6 is a plan view showing another embodiment of the arrangement of limit switches for vertical feed control. (7)... Planting mechanism, (8)... Seedling stand, (12)... Vertical feed mechanism, (16)...
... Actuator, (26) ... Control means, (W) ... Mat-shaped seedling.

Claims (1)

[Claims] While reciprocating the seedling platform (8) in the horizontal direction, seedlings are cut out one by one from the lower edge of the mat-shaped seedlings (W) placed on the seedling platform (8) and planted in the field. Attaching mechanism (7)
, and a rice transplanter comprising a vertical feed mechanism (12) that feeds the placed mat-like seedlings (W) downward by a predetermined amount every time the seedling table (8) reaches the stroke end in the horizontal direction. A seedling planting device, comprising a reciprocating actuator (16) for driving the vertical feed mechanism (12),
Every time the seedling stand (8) reaches the stroke end,
This actuator (16) is operated back and forth once, and
A seedling planting device for a rice transplanter comprising a control means (26) capable of continuously reciprocating an actuator (16) at a position before the seedling platform (8) reaches the stroke end.