JPH0829018B2 - Pre-seedling storage structure for rice transplanter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is provided with a seedling placing table on which a seedling for planting is placed and which reciprocates left and right with a constant stroke. A seedling remaining amount sensor that detects that the seedling amount has decreased is provided in the middle of the placement surface, and a preliminary seedling is secured by locking the seedling mounting table side above the seedling mounting table. A preliminary seedling accommodation device is provided so as to be swingable by switching between a seedling placement state in which it is placed and held and a seedling supply state in which the locking member releases the locked state by the operation of the drive actuator and swings downward. The present invention relates to a preliminary seedling accommodation structure of a rice transplanter configured to operate a drive actuator after the detection operation of the remaining amount sensor to switch the preliminary seedling accommodation device in the seedling mounting state to a seedling supply state.

[Conventional technology]

As a conventional preliminary seedling storage device, there is one having a structure previously filed by the applicant (Japanese Patent Application No. 63-52198). That is, when the seedling remaining amount sensor detects that the seedling remaining amount is low, the drive actuator is activated immediately to supply the preliminary seedling onto the seedling mounting table.

[Problems to be Solved by the Invention]

The conventional structure is designed so that when the amount of seedlings placed on the seedling placing table becomes small, the preliminary seedlings can be automatically supplied quickly to enable continuous planting work for a long time. However, if the remaining seedling sensor detects and operates only when it reaches the stroke end of the seedling table where the seedlings are always fed vertically, no problem occurs. The quantity sensor does not always detect and operate at the stroke end, but may operate during the lateral movement of the seedling table depending on the condition of the seedling bed soil.

Then, the preliminary seedlings slide down from the upper side and collide with the upper part of the planting seedlings in a state where the lower end edge of the planting seedlings is cut out to an intermediate part, and thus the planting seedlings may be deformed. As a result, there was a risk that unevenness would occur at the bottom edge, resulting in a shortage of seedlings and missing plants.

Further, in the conventional structure, since the preliminary seedling is automatically supplied, for example, the seedling is not erroneously placed on the preliminary seedling accommodation device, or the preliminary seedling is placed and the drive actuator is operated. Nevertheless, there is a risk that the driver may continue the planting operation without noticing the seedlings that have not been supplied, and only some of the rows may have unplanted parts.

An object of the present invention is to eliminate the above problems.

[Means for solving the problem]

A feature of the present invention is that the preliminary seedling accommodation structure of the rice transplanter described at the beginning is configured as follows.

Providing a stroke end detection sensor that detects that the seedling mounting table has reached the stroke end, and after the seedling remaining amount sensor detects and operates, when the stroke end detection sensor detects and operates, it includes a control means that operates the drive actuator, There is provided an alarm means for emitting an alarm sound only when the seedling remaining amount sensor maintains the detection operation for a predetermined period after the drive actuator is operated.

[Operation] With the configuration according to the present invention, even when the seedling remaining amount sensor detects and operates during the lateral movement of the seedling mounting table, the drive actuator does not immediately operate, and the seedling mounting table reaches the stroke end and strokes. After the end detection sensor is activated, the drive actuator is activated to supply the preliminary seedling.

Then, when the drive actuator is activated and the preliminary seedling accommodation device is switched to the seedling supply state and operated, the seedling remaining amount sensor continues to detect that the seedling amount is small,
Since the alarm sound is generated for a predetermined period, the driver can confirm the abnormality.

〔The invention's effect〕

Therefore, seedlings are supplied from the upper side in a state where the planted cut-out region on the lower end side of the planting seedling is entirely planted and the lower end edge is substantially linear, so that there is less risk of the shape collapse. As a result, it became possible to prevent shortages during the planting process.

Moreover, although the spare seedling accommodation device has been switched to the seedling supply state, for example, when the seedlings are not caught and supplied, or when the spare seedlings are not placed by mistake,
The driver can confirm an abnormal situation where seedlings are not being supplied, and it is possible to prevent adverse effects such as the unplanted part of only some rows.

It may be possible to configure an alarm to be issued immediately when the seedling remaining amount sensor detects that the seedling remaining amount is low. Until the end, the audible alarm will continue to be emitted, and noise that is offensive to the driver will frequently occur.However, in the present invention, the audible alarm is emitted only when the abnormality occurs and only for a predetermined period. Such a problem does not occur.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 7 shows a riding type rice transplanter according to the present invention.
This rice transplanter is constructed by connecting a 6-row seedling planting device (2) to the rear part of a riding type traveling machine body through a link mechanism (1) which can be driven up and down.

The seedling planting device (2) comprises a seedling stand (3) in a backward descending posture, a planting mechanism (4) and a grounding float (5) arranged for each row below and behind the seedling stand (3). ) Etc. The seedling placing table (3) is attached to the planted transmission case (6) also serving as a frame so as to reciprocate left and right with a constant stroke, and the seedling placing table (3) is attached to the lower part of the seedling placing table (3). Endless belt type seedling vertical feed mechanism with protrusions that locks on the placed seedlings during horizontal movement to prevent slipping and keeps the position, and at the end of the stroke, feeds downward by an amount equivalent to the planting amount per plant (7) Two are provided for each article.

As shown in FIG. 3, each planting mechanism (4) is equipped with a rotary case (8) that rotates around a horizontal axis at the rear of the planting transmission case (6), and an ellipse is formed at both ends of the rotary case (8). It is constructed by attaching a planting claw (9) for taking out and planting seedlings from the lower end of the placed seedling while drawing a locus, and a fertilizer application device (10) is provided above the planting mechanism (4).

A spare seedling storage device (11) is provided above the seedling mounting table (3), and this spare seedling storage device (11) is located above and holds the seedlings in a posture substantially parallel to the seedling mounting base (3). The seedling placing position for placing and holding and the seedling supplying position where the rear end contacts the seedling placing table (3) are configured to be switchable and swingable. As shown in FIGS. 3, 4 and 5, side walls (13) are erected from the partition (12) between the rows of the seedling placing table (3) over substantially the entire length of the preliminary seedling accommodation device (11). The front end portion of the preliminary seedling accommodation device (11) is pivotally connected to the side walls (13) on both sides so as to be swingable around the horizontal axis (X ₁ ). The preliminary seedling accommodation device (1) is attached to the locking member (15) that can be swung back and forth by the operation of an electromagnetic solenoid (14) (corresponding to a drive actuator) fixedly attached to the side wall (13).
1) The rear end portion is locked to maintain the seedling placing state, the locking with the locking member (15) is released, and the preliminary seedling accommodation device (11) swings downward by its own weight, It is configured to supply seedlings.

And a non-detection state of projecting upward from the seedling placing surface (3a) of the seedling placing table (3) at the center of the seedling placing mechanism (7) in the lateral direction middle of the seedling placing mechanism (7) in the horizontal direction A seedling remaining amount sensor (16) is provided which can be switched between a detection state in which the seedling placement weight (3a) retreats below the seedling placement surface (3a). When the remaining seedling sensor (16) detects that the remaining seedlings on the seedling placing table (3) are running low, the electromagnetic solenoid (1
4) is operated, and the spare seedling storage device (11) is linked so as to switch from the seedling placement position to the seedling supply position.

A seedling holding stay (17) for preventing floating of the seedling is attached to the preliminary seedling accommodation device (11), and the seedling holding stay (17) is biased downward by a spring (18). It is designed in order to save the trouble of adjusting the height each time according to the situation of seedlings.

Next, a mounting structure of the locking member (15) and the electromagnetic solenoid (14) will be described. As shown in FIG. 6, a substantially box-shaped mounting member (20) is fixed to a support frame (19) which is horizontally fixed by being fixed to the upper rear end side of each side wall (13). An electromagnetic solenoid (14) is housed inside and a locking member (15) is swingably supported around a horizontal axis (X ₂ ). A pivot pin (21) is inserted into a laterally formed through hole in the middle of the longitudinal direction for pivotal support, and the upper surface of one end of the pivot member (21) engages with the contact portion (14a) of the electromagnetic solenoid (14) with a locking member (15). The notch (22) at the tip of the preliminary seedling accommodation device (11) is placed and locked on the upper surface of the other end of the locking member (15). Further, the locking member (15) is biased by the spiral spring (23) in the direction opposite to the rotational direction in which the load of the preliminary seedling accommodation device (11) is applied.

The notch (22) for locking on the side of the spare seedling accommodation device (11) is
The spring (24) is urged toward the locking member (15) side, and the position of the locking member (15) is regulated at a predetermined position.
The mounting locking surface (15a) is formed to be inclined relative to the lower surface of the notch (22).

Stroke end detection sensors (25a) and (25b) for detecting that the seedling mounting table (3) has reached the left and right stroke ends are provided in the planted transmission case (6), and the seedling remaining amount sensor ( When the stroke end detection sensors (25a) and (25b) detect and actuate after 16) detects that the seedlings are running low, a control means is provided to activate the electromagnetic solenoid (14) to automatically supply the preliminary seedlings. is there. Moreover, when the seedling mounting table (3) reaches the stroke end on the right side, the control means controls the electromagnetic solenoids (1
4) When only the group is activated and the stroke end on the left side is reached, control is performed so that only the electromagnetic solenoids (14) group for the left three articles are activated, and all six electromagnetic solenoids (14) are activated simultaneously to cause excessive current. Is taken into consideration to prevent it from flowing.

A control block diagram is shown in FIG. A control section (26) is provided for each article, and each of the control sections (26) for the three articles on the right side,
The output of the left side seedling remaining amount sensor (16) and the right side stroke end detection sensor (25a) are given, and the left side 3 row control unit (26) similarly applies the corresponding seedling remaining amount. Quantity sensor (16) and left stroke end detection sensor (25
The output of b) is given respectively. Since all the control units (26) have the same configuration, the configuration of the control unit (26) for one section will be described below.

It is provided with a NOR circuit (27) to which outputs of the seedling remaining amount sensor (16) and the stroke end detection sensors (25a) and (25b) are provided, and the output of the NOR circuit (27) is the first timer circuit (28) and the second. It is given to the timer circuit (29). Then, the output side of the first timer circuit (28) is connected to the electromagnetic solenoid (14) via the amplifier circuit (30) and the drive circuit (31).
Output side of second timer circuit (29) and seedling remaining amount sensor (16)
An AND circuit (33) whose output is given through an inverting circuit (32) is provided.

The seedling remaining amount sensor (16) is in an open state when there are many seedlings, and the output is set to a low level when the detection operation is performed. The stroke end detection sensors (25a), (2
5b) is configured to switch from high level to low level when detection is activated. Then, the OR circuit (34) to which the output of the AND circuit (33) of each control section (26) is input, respectively.
The output side of this OR circuit (34) is an amplifier circuit (30)
Also, it is connected to a buzzer (37) (corresponding to alarm means) and a lamp (38) via a drive circuit (36).

 Next, the control operation will be described.

FIG. 2 shows a timing chart showing the operation. Figure 2 (a) shows the stroke end detection sensor (25
The outputs of a) and (25b) are shown, and FIG. 2 (b) shows the output of the seedling residual quantity sensor (16). When the seedling remaining amount sensor (16) is activated at the time (T ₁ ) during the lateral movement of the seedling placing table (3),
When the output becomes low level and reaches the stroke end (T ₂ ), the NOR circuit (27) outputs a high level signal (Fig. 2 (c)). The first timer circuit (28) maintains the high level output for about 0.5 seconds from the stroke end time (T ₂ ) (Fig. 2 (D)), and operates the electromagnetic solenoid (14) for about 0.5 seconds.

On the other hand, the second timer circuit (29) is at the stroke end
From (T ₂ ), maintain the high level for about 20 seconds (Fig. 2 (e)). Then, when the electromagnetic solenoid (14) is activated (T
Immediately after ( ₃ ), seedlings are supplied and the remaining seedling sensor (16) goes into a non-detection state (see Fig. 2 (d) and (v)), so the AND circuit (33) stays at high level for 0.5 seconds only. Output (Fig. 2 (g)), and turn on the buzzer (37) and lamp (38) momentarily (approx.
Drive for 0.5 seconds only).

The above operation is the case when it is normal, but in any of the articles, the seedling remaining amount sensor (16) is in the seedling existence state (that is, the high level output state) even though the electromagnetic solenoid (14) is activated. If the abnormal condition does not occur, as shown by the dotted line in Fig. 2 (g), the high level is maintained even after one input of the AND circuit (33) has passed the operation time (T ₃ ) of the electromagnetic solenoid (14). Therefore, the buzzer (37) and the lamp (38) continue to operate for about 20 seconds, so that the operator can be alerted that an abnormality has occurred.

In this way, the automatic supply of the preliminary seedlings is always performed only at the stroke end of the seedling mounting table (3), and it is possible to prevent the seedling collapse due to the impact of the seedling supply.

Power supply switch (SW) for each controller (26)
Is linked to the planting work clutch lever (39) on the machine side, and turns on the power supply switch (SW) as the planting work area is operated, and each control unit (26) is activated only when necessary. It is designed to reduce the power consumption.

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 drawing shows an embodiment of a preliminary seedling accommodation structure of a rice transplanter according to the present invention, FIG. 1 is a control block diagram, FIG. 2 is a timing chart diagram, FIG. 3 is a side view of a seedling planting device of the rice transplanter, Fourth
The figure is a side view of the lower part of the preliminary seedling storage device, Fig. 5 is a vertical rear view of the preliminary seedling storage device, Fig. 6 is a vertical side view of the electromagnetic solenoid arrangement portion, and Fig. 7 is the entire side surface of the riding type rice transplanter. It is a figure. (3) …… Seedling stand, (3a) …… Seedling placement surface, (11) …… Spare seedling storage device, (14) …… Drive actuator, (15)
…… Locking member, (16) …… Seedling remaining amount sensor, (25a), (2
5b) …… Stroke end detection sensor, (37) …… Alarm means.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Hiroshi Okuda 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Sakai Works (72) Inventor Yoshiyuki Kojima 64, Ishizukitacho, Sakai City, Osaka Kubota Iron Works Co., Ltd. Sakai Factory

Claims (1)

[Claims] 1. A seedling placing table (3) for placing planting seedlings and reciprocating left and right with a constant stroke is provided, and the seedling placing surface (3a) of the seedling placing table (3) is on the way. A seedling remaining amount sensor (16) for detecting that the amount of seedlings has decreased is provided at the site, and a locking member (on the seedling mounting table (3) side above the seedling mounting table (3) ( The seedling placement state in which the preliminary seedlings are placed and held by being locked to 15) and the locking member (15) releases the locked state by the operation of the drive actuator (14) and swings downward. A spare seedling accommodation device (11) is provided so as to be swingable to switch to a supply state, and after the seedling remaining amount sensor (16) is detected, the drive actuator (14) is operated to set the seedling placement state. A preliminary seedling accommodation structure of a rice transplanter configured to switch the preliminary seedling accommodation device (11) in (1) to the seedling supply state, Stroke end detection sensors (25a) and (25b) are provided to detect that the mounting table (3) has reached the stroke end, and the stroke end detection sensor (25a) is provided after the seedling remaining amount sensor (16) has been activated. ), (25b), the control means for actuating the drive actuator (14) is provided, and the seedling remaining amount sensor (16) detects the seedling remaining amount sensor (16) for a predetermined period after the actuation of the drive actuator (14). A spare seedling storage structure for rice transplanters equipped with an alarm means (37) that emits an alarm sound only when the operation is maintained.