JPH0728588B2 - 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 for detecting that the seedling amount has decreased is provided in the middle part of the placing part, and it is also retained above the seedling placing table by a locking member provided on the seedling placing table side for preliminary operation. The preliminary seedling accommodation device is swingably switchable between a seedling placing state in which the seedlings are placed and held and a seedling supplying state in which the locking member releases the locked state and swings downward by the operation of a drive actuator. Of the seedling planting machine arranged to switch the spare seedling accommodation device in the seedling mounting state to the seedling supply state by operating the drive actuator after detecting and operating the remaining seedling amount sensor. Spare seedling accommodation structure.

[Conventional technology]

As the conventional preliminary accommodation device, there is one having a structure previously filed by the present applicant (Japanese Patent Application No. 63-52198). That is, as soon as the seedling remaining amount sensor detects that the seedling remaining amount is low, the electromagnetic solenoid, which is an example of the drive actuator, is activated to supply the preliminary seedling onto the seedling mounting table.

[Problems to be Solved by the Invention]

The above-mentioned conventional structure is designed so that when the amount of seedlings placed on the seedling placing table becomes small, the preliminary seedlings are automatically supplied to enable continuous planting work for a long time. However, there is no problem if the seedling remaining amount sensor operates only when it reaches the stroke end of the seedling mounting table where seedlings are vertically fed. The remaining amount 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 portion of the planting seedlings in a state where the lower end edge of the planting seedlings is cut out to an intermediate portion, and thus the planting seedlings may be deformed. As a result, there were drawbacks such as unevenness at the bottom edge, which could lead to insufficient seedling removal and lack of stock.

The present invention aims to solve the above-mentioned problems.

[Means for Solving the Problems]

A feature of the present invention is, in the preliminary seedling accommodation structure of the seedling planting machine described at the beginning, a stroke end detection sensor for detecting that the seedling mounting table has reached the stroke end is provided, and the seedling remaining amount sensor is operated to detect. After that, when the stroke end detection sensor detects and operates, the drive actuator is operated to provide a control means for switching the preliminary seedling accommodation device to the seedling supply state, and the action and effect are as follows. is there.

[Work]

That is, even when the seedling remaining amount sensor is detected 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 the stroke end detection sensor operates. The drive actuator operates to supply the preliminary seedlings.

〔The invention's effect〕

Therefore, the 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 possibility that the shape is deformed. As a result, it became possible to prevent shortages during the planting process.

〔Example〕

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

FIG. 9 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 a rear portion 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 table (3) in a backward descending posture, a planting mechanism (4) and a grounding float (4) arranged for each row behind and below the seedling table (3). 5) and the like, the seedling 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 at the bottom of the seedling table (3), Endless belt type seedlings with protrusions that lock onto the placed seedlings to prevent them from sliding down and hold the position when the seedling placing table (3) moves laterally, and at the end of the stroke, extend downward by an amount equivalent to the planting amount per plant. Two vertical feed mechanisms (7) are provided for each line.

As shown in FIG. 3, in each of the planting mechanisms (4), a rotary case (8) that rotates around the horizontal axis is attached to the rear of the planting transmission case (6), and the case (8) is attached. It is configured by attaching planting claws (9) for cutting and planting seedlings from the lower end of the placed seedlings on both ends of the plant while drawing an elliptical locus, and equipped with a fertilizer application device (10) above this planting mechanism (4). I am doing it.

A preliminary seedling accommodation device (11) is provided above the seedling placing table (3), and the preliminary seedling accommodation device (11) is located above and has a posture substantially parallel to the seedling placing table (3). The seedling placing position for holding and holding the seedling and the seedling supplying position where the rear end contacts the seedling placing table (3) are configured to be switchable and swingable. More specifically, as shown in FIG. 3 to FIG. 5, the side wall (13) from each partition (12) between the rows of the seedling placing table (3) is connected to the side wall (13) of substantially the entire length of the preliminary seedling accommodation device (11). And the side walls (13), (1) on both sides at the front end of the preliminary seedling accommodation device (11).
It is pivotally connected to 3) so that it can swing around the horizontal axis (X ₁ ). The rear end portion of the preliminary seedling accommodation device (11) is attached to a locking member (15) that can be swung back and forth by the operation of an electromagnetic solenoid (14) as a drive actuator that is fixedly attached to the side wall (13). To maintain the seedling placement state, and release the engagement with the locking member (15) so that the preliminary seedling storage device (11) swings downward by its own weight to enter the seedling supply state. It is configured to be.

And, the seedling vertical feed mechanism (7) on the seedling mounting table (3)
In the middle of the lateral direction of the seedling and at the central position in the vertical feed direction, the seedling placing surface (3a) is projected by the non-detecting state protruding upward from the seedling placing surface (3a) of the seedling placing table (3) and the seedling placing surface (3a). A seedling remaining amount sensor (16) is provided which can be switched between a state of detecting a downward movement and a state of detection. When the seedling remaining amount sensor (16) detects that the remaining seedlings on the seedling placing table (3) are running low, the electromagnetic solenoid (14) is activated to operate the preliminary seedling accommodation device (1).
1) is linked from the seedling placement position to the seedling supply position.

Next, a mounting structure of the locking member (15) and the electromagnetic solenoid (14) will be described. As shown in FIGS. 6 to 8, the support frame (19) is fixed to the upper side of the rear end of each of the side walls (13) and hangs over the support frame (19). An electromagnetic solenoid (14) is provided inside, and the locking member (15) is swingably supported around a horizontal axis (X ₂ ). That is, the locking member (15) is pivotally supported by inserting the pivot pin (21) into an insertion hole formed laterally in the middle of the longitudinal direction, and the upper surface of one end of the engaging member (15) is a movable piece of the electromagnetic solenoid (14). (14a), and a notch (22) at the tip of the preliminary seedling accommodation device (11) is placed and locked on the upper surface of the other end. Further, the locking member (15) is biased by a spiral spring (23) in a direction opposite to the rotational direction in which the load of the preliminary seedling accommodation device (11) is applied.

The locking notch (22) on the side of the preliminary seedling accommodation device (11) is
The spring (24) urges it toward the locking member (15) and regulates the position at a predetermined position, and the mounting locking surface (15a) of the locking member (15) has the notch (22). 2) is formed so as to be inclined relative to the lower surface. In this way, it is considered that the distance (l ₁ ) from the rocking shaft core (X ₂ ) of the locking member (15) to the point of action on which the load of the preliminary seedling is applied is always constant, and the rocking shaft is set the distance from the core (X ₂₎ to abutment point between the electromagnetic solenoid (14) to (l ₂₎ in greater than the distance (l _1), an electromagnetic solenoid (1
Consideration is given to reduce the load on 4). or,
The swinging fulcrum (X ₁ ) of the preliminary seedling accommodation device (11) is provided at a position displaced downward from the upper end of the preliminary seedling so as to reduce the load applied to the notch (22).

Stroke end detection sensors (25a), (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),
After the seedling remaining amount sensor (16) detects that the seedling is running low, the stroke end detection sensor (25
When a) and (25b) are activated, the electromagnetic solenoid (14)
There is provided a control means for activating the above to automatically supply the preliminary seedlings. Moreover, when the seedling table (3) reaches the right stroke end, the control means activates only the electromagnetic solenoids (14) group of the right three articles out of the six articles and reaches the left stroke end. , Electromagnetic solenoids for the left three rows (1
4) It is controlled to operate only the group, and it is considered to prevent an excessive current from flowing by simultaneously operating all 6 electromagnetic solenoids (14). This will be described in detail below.

A control block diagram is shown in FIG.

That is, each row is equipped with a control unit (26), and each of the right side control sections (26) has a right side 3 row seedling residual amount sensor (16).
And the output of the right side stroke end detection sensor (25a) are given to the left side stroke end detection sensor (25b) and the left side stroke end detection sensor (25b) in the same way to the control section (26) for the left side three rows. ) Output is given respectively. Since the control units (26) have the same configuration, the configuration of one control unit (26) will be described below.

That is, both sensors (16), (25a) or (25b)
With the NOR circuit (27) that gives the output of
The output of the NOR circuit (27) is the first timer circuit (28) and the second
It is given to the timer circuit (29). 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). On the other hand, the output side of the second timer circuit (29) and the 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 is activated, and the stroke end detection sensors (25a) and (25b) are activated when the detection is activated. It is configured to switch to a low level. Then, each control unit (2
An OR circuit (34) to which the output of the AND circuit (33) of 6) is input is provided, and the output side of this OR circuit (34) is provided with a buzzer (37) via an amplifier circuit (30) and a drive circuit (36). ) And lamp (38).

Next, the control operation will be described.

FIG. 2 shows a timing chart showing the operation.
FIG. 2 (a) shows the output of the stroke end detection sensor (25a) or (25b), and FIG. 2 (b) shows the output of the seedling remaining amount sensor (16). When the seedling remaining amount sensor (16) detects and operates at a point (T ₁ ) during the lateral movement of the seedling mounting table (3), its output becomes low level, and when the stroke end (T ₂ ) is reached, 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 time of the stroke end (T ₂ ), and actuates the electromagnetic solenoid (14) for about 0.5 seconds (FIG. 2 (d)). On the other hand, the second timer circuit (2
In 9), the high level is maintained for about 20 seconds from the stroke end time (T ₂ ) (Fig. 2 (e)). Then, the seedlings are supplied immediately after the operation time (T ₃ ) of the electromagnetic solenoid (14), and the seedling remaining amount sensor (16) is in the non-detection state (see FIGS. 2 (d) and 2 (f)). The AND circuit (33) outputs a high level only for 0.5 seconds (Fig. 2 (g)), and drives the buzzer (37) and the lamp (38) momentarily (only for about 0.5 seconds).

The above-mentioned 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) despite the electromagnetic solenoid (14) being activated. If it becomes an abnormal operation that does not happen, it will be shown in Fig. 2 (g).
As shown by the dotted line in FIG. 3, since one input of the AND circuit (33) maintains the high level even after the operation time (T ₃ ) of the electromagnetic solenoid (14), the buzzer (37) and the lamp (38) are maintained. Will continue to operate for about 20 seconds, and 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.

Seedling, the power supply switch (SW) for each control unit (26) is linked to the planting work clutch lever (39) on the machine side, and the switch (SW) is turned on in accordance with the operation to the planting work area. The control section (26) is turned on to operate only when necessary, and it is considered to reduce power consumption.

[Another embodiment]

As the drive actuator, various drive mechanisms such as a hydraulic drive mechanism may be used.

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 a preliminary seedling accommodating 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 the rear portion of the rice transplanter, and Fig. 4 is FIG. 5 is a side view of the lower portion of the preliminary seedling accommodation device, FIG. 5 is a longitudinal rear view of the preliminary seedling accommodation device, FIG. 6 is a longitudinal side view of the electromagnetic solenoid arrangement portion, and FIG. 7 is a plan view of the electromagnetic solenoid arrangement portion. FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. 7, and FIG. 9 is an overall side view of the rice transplanter. (3) …… seedling mounting table, (3a) …… seedling mounting surface, (11) …… spare seedling storage device, (14) …… electromagnetic solenoid, (15) ……
Locking member, (16) …… Seedling remaining amount sensor, (25a), (25b)
...... Stroke end detection sensor.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masamin Fukuda 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Sakai Works (72) Inventor Takeshi Mukai 64, Ishizukitamachi, Sakai City, Osaka Kubota Iron Works Co., Ltd. Sakai Factory (72) Inventor Yosuke Matsushita 64 Ishizukita-cho, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Sakai Factory (56) Reference JP 62-48313 (JP, A) JP 56-99705 (JP) , A)

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 part (3a) of the seedling placing table (3) is in the middle. 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 be switched to a supply state, and after the seedling residual amount sensor (16) is detected, the drive actuator (4) is operated,
A preliminary seedling accommodation structure of a seedling planting machine configured to switch the preliminary seedling accommodation device (11) in the seedling placing state to the seedling supplying state, wherein the seedling placing table (3) is at a stroke end. Stroke end detection sensors (25a) and (25b) are provided to detect that the stroke end detection sensors (25a) and (25b) are activated after the seedling remaining amount sensor (16) is activated. A preliminary seedling accommodation structure for a seedling planting machine, which is provided with a control means for operating the drive actuator (14) to switch the preliminary seedling accommodation device (11) to a seedling supplying state.