JPH02265407A - Structure for housing reserve seedling of rice transplanter - Google Patents

Abstract

PURPOSE:To reduce loss of shape and prevent a missing plant from occurring by providing a structure with a controlling means for operating a driving actuator when a stroke end detecting sensor performs detaching operation and changing over a reserve seedling housing device to a state for supplying seedlings. CONSTITUTION:If abnormal operation in which a sensor 16 for the amount of residual seedlings performs detecting operation in the course of a transverse movement of a seedling carrier, an output thereof attains a low level to output a high-level signal from a NOR circuit 27 in reaching the stroke end. The first timer circuit 28 maintains a high-level output for a prescribed time from the time of the stroke end to operate an electromagnetic solenoid 14 for a prescribed time. On the other band, the second timer circuit 20 keeps a high level for a prescribed time from the time of the stroke end. Seedlings are supplied just after the operation time of the electromagnetic solenoid 14 and the sensor 16 for the amount of the residual seedlings attains an undetecting state. Thereby, a high level output is outputted from an AND circuit 33 only for a prescribed time to instantaneously drive a buzzer 37 and a lamp 38.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is equipped with a seedling stand in an inclined position that reciprocates from side to side with a constant stroke on which seedlings are placed. A seedling remaining amount sensor is provided in the middle of the seedling placement section to detect when the amount of seedlings has decreased, and a seedling remaining amount sensor is provided above the seedling placement section to be engaged with a locking member provided on the seedling placement side. A seedling loading state in which the preliminary seedlings are placed and held by the driver, and a seedling feeding state in which the locking member releases the locking state and swings downward by the operation of the drive actuator. A rice planting device is provided, and after the sensing operation of the remaining amount of seedlings sensor, the drive actuator is operated to switch the preliminary seedling accommodating device in the seedling placement state to the seedling supplying state. Regarding the preliminary seedling storage structure of the machine.

[Conventional technology]

As a conventional preliminary seedling storage device, there is one having a structure previously filed by the present applicant (Japanese Patent Application No. 52198/1983). In other words, as soon as the seedling remaining amount sensor detects that the remaining amount of seedlings has decreased, an electromagnetic solenoid, which is an example of the driving actuator, is activated to supply spare seedlings onto the seedling platform.

[Problem to be solved by the invention]

The conventional structure described above is designed to automatically supply spare seedlings when the number of seedlings placed on the seedling stand decreases, thereby enabling continuous planting work over a long period of time. However, if the seedling remaining amount sensor always detects the seedlings when it reaches the end of the stroke of the seedling stand where the seedlings are vertically fed, no problem will occur. The remaining amount sensor does not always operate to detect the stroke depth, and may operate during the horizontal movement of the seedling stand depending on the situation of the seedlings on the floor. In this case, when planting, the preliminary seedling slides down from above with the lower edge of the seedling cut halfway down and collides with the top of the seedling, so the seedling may lose its shape during planting. There is. the result,
It has drawbacks such as unevenness on the lower edge, which may lead to insufficient seedling yield and plant dropout.

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

[Means to solve the problem]

A feature of the present invention is that, in the preliminary seedling storage structure of the rice transplanter described at the beginning, a stroke end detection sensor is provided to detect when the seedling platform has reached the stroke end, and after the seedling remaining quantity sensor operates to detect , a control means is provided for operating the drive actuator to switch the preliminary seedling storage device to a seedling supply state when the stroke end detection sensor detects and operates, and the operation and effect thereof are as follows. .

[For production]

In other words, even if the seedling remaining amount sensor activates during the horizontal movement of the seedling platform, the drive actuator does not operate immediately, and only after the seedling platform reaches the stroke end and the stroke end detection sensor is activated. , the drive actuator is actuated to supply the reserve seedlings.

〔Effect of the invention〕

Therefore, when planting, the seedlings are supplied from the upper side with the entire cutting area on the lower end side of the seedlings being planted and the lower edge is in a substantially straight line, reducing the risk of the seedlings losing their shape. . As a result, it has become possible to prevent plant defects from occurring in the middle of rows during planting.

〔Example〕

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

FIG. 9 shows a riding type rice transplanter according to the present invention. This rice transplanter is constructed by connecting a six-row seedling planting device (2) to the rear of a riding-type traveling body via a link mechanism (1) that can be driven up and down.

The seedling planting device (2) has a seedling platform (3) that is tilted downward at the rear.
), a planting mechanism (4) and a ground float (5) arranged for each row at the rear and lower part of the seedling platform (3), and the seedling platform (3) also serves as a planting frame. It is attached to the transmission case (6) so that it can be driven to reciprocate from side to side with a constant stroke, and the lower part of the seedling platform (3) locks onto the seedlings and slides when the seedling platform (3) moves laterally. Two endless belt vertical feed mechanisms (7) with protrusions are provided on each row to prevent the seedlings from falling and maintain their position, and to feed the seedlings downward every step corresponding to the amount of one plant planted at the end of the stroke.

As shown in FIG. 3, each of the planting mechanisms (4) has a rotating case (8) that rotates around a horizontal axis attached to the rear part of the planting transmission case (6), and It consists of a planting claw (9) that cuts out and plants the seedlings from the lower end of the placed seedlings while drawing an elliptical trajectory at both ends, and a fertilization device (10) is installed above the planting mechanism (4). It has been done.

A preliminary seedling accommodating device (11) is provided above the seedling platform (3), and this preliminary seedling accommodating device (11) is located above and holds the seedlings in a position substantially parallel to the seedling platform (3). It is configured to be able to freely switch and swing between a seedling loading position where the seedlings are placed and held and a seedling supplying position where the rear end is in contact with the seedling loading stand (3). To explain in detail, as shown in FIGS. 3 to 5, the seedling stand (
Side walls (13) are erected from the partitions (12) between the rows in 3) over substantially the entire length of the preliminary seedling storage device (11), and the side walls on both sides are installed at the front end of the preliminary seedling storage device (11). (13
).

It is pivotally connected to (13) so as to be swingable around the horizontal axis (Xl). A rear end portion of the preliminary seedling storage device (11) is attached to a locking member (15) that can swing in and out by the operation of an electromagnetic solenoid (14) as a drive actuator fixedly attached to the side wall (13). is locked to maintain the seedling placement state, and at the same time, the locking with the locking member (15) is released so that the preliminary seedling storage device (11) swings downward by its own weight to enter the seedling supplying state. It is configured so that

and the seedling vertical feeding mechanism (7) in the seedling platform (3).
At the center in the horizontal direction and in the center position in the vertical feeding direction, the seedling mounting surface (3a) is projected upwardly from the seedling mounting surface (3a) of the seedling mounting table (3) due to the non-detection state and the weight of the seedlings. A remaining amount of seedlings sensor (16) is provided that can be switched freely between a detection state in which the seedlings move downward and retreat. When the remaining seedling sensor (16) detects that there are few remaining seedlings on the seedling platform (3), the electromagnetic solenoid (14) is actuated, and the preliminary seedling storage device (11) is placed on the seedling tray. It is linked to switch from the seedling supply position to the seedling supply position.

Next, the locking member (15) and the electromagnetic solenoid (14
) mounting structure will be explained. As shown in FIGS. 6 to 8, a substantially box-shaped mounting member (20) is attached to a support frame (19) fixed to the upper rear end side of each of the side walls (13) and suspended horizontally. An electromagnetic solenoid (14) is installed inside, and the locking member (15) is supported so as to be swingable around the horizontal axis (Xt). That is, the locking member (15
) is pivotally supported by inserting a pivot pin (21) into an insertion hole formed laterally in the middle of the longitudinal direction, and the upper surface of one end is in contact with the movable piece (14a) of the electromagnetic solenoid (14). A spare seedling storage device (11) is installed on the top surface of the other end.
The notch (22) at the tip of the plate is configured to be placed and locked. Further, the locking member (15) is attached to the preliminary seedling storage device (
11) is biased by a helical spring (23) in a direction opposite to the rotational direction in which the load is applied.

Locking notch (22) on the side of the preliminary seedling storage device (11)
is biased toward the locking member (15) by a spring (24) and is regulated in position at a predetermined position, and the mounting and locking surface (15a) of the locking member (15) is aligned with the notch. It is formed to be inclined relative to the lower surface of (22). In this way, consideration is given so that the distance (11) from the pivot axis (X2) of the locking member (15) to the point of application on which the load of the preliminary seedling is applied is always constant, and the pivot axis ( The distance (l,) from X2) to the point of contact with the electromagnetic solenoid (14) is set larger than the distance (11) to reduce the load on the electromagnetic solenoid (14). .Furthermore, the preliminary seedling storage device (1
The swing fulcrum (Xl) of 1) is provided at a position shifted downward from the upper end of the preliminary seedling, so as to reduce the load applied to the notch (22).

Inside the planting transmission case (6), there is a stroke end detection sensor (25a) that detects when the seedling platform (3) has reached the left and right stroke ends.

(25b) is provided, and when the stroke end detection sensors (25a) and (25b) are activated after the remaining seedling amount sensor (16) detects that there are few remaining seedlings, an electromagnetic solenoid (14) is provided. A control means is provided for automatically supplying spare seedlings by activating the control means. Moreover, when the seedling platform (3) reaches the right stroke end, the control means operates only the three right-hand electromagnetic solenoids (14) groups out of the six provisions, and when the seedling platform (3) reaches the left-hand stroke end, Control is performed so that only the three groups of electromagnetic solenoids (14) on the left side are operated, and all six groups of electromagnetic solenoids (14) are activated.
It is designed to prevent excessive current from flowing when the two actuators operate at the same time. The details will be explained below.

FIG. 1 shows a control block diagram.

In other words, each row is provided with a control section (26), and each of the control sections (26) for the three right rows is provided with a seedling remaining quantity sensor (26) for the three right rows.
16) output and the right stroke end detection sensor (2
The output of 5a) is given, and the control section (26) for the three items on the left
Similarly, the outputs of the seedling remaining amount sensor (16) and the left stroke end detection sensor (25b) of the corresponding row are respectively given. Since each of the control sections (26) has the same configuration, the configuration of one control section (26) will be explained below.

In other words, it includes a NOR circuit (27) to which the outputs of both sensors (16), (25a) or (25b) are given, and the output of the NOR circuit (27) is fed to the first timer circuit (28) and the second timer circuit. (29) is given.

The output side of the first timer circuit (28) is the amplifier circuit (3).
0) and the electromagnetic solenoid (1) via the drive circuit (31).
4). On the other hand, the second timer circuit (29)
The output side of the sensor (16) and the output of the remaining seedling amount sensor (16) are
32) provided through an AND circuit (33). The seedling remaining amount sensor (16) is configured to be in an open state when there are many seedlings, and output is at a low level when detection is activated.
5a) and (25b) are configured to switch to low level when the detection is activated. And each control section (26)
The output side of the OR circuit (34) is connected to the buzzer (3) via the amplifier circuit (30) and the drive circuit (36).
7) and a lamp (38).

Next, the control operation will be explained.

FIG. 2 shows a timing chart showing the operation.

Figure 2 (a) shows the stroke end detection sensor (25a)
Alternatively, the output of (25b) is shown, and FIG. 2 (b) shows the output of the remaining seedling amount sensor (16). When the seedling remaining amount sensor (16) detects and operates at the time (T1) during the horizontal movement of the seedling platform (3), its output becomes a low level, and when it reaches the stroke end (T2), the above-mentioned Noah circuit (27) outputs a high level signal (Fig. 2 (c)). The first timer circuit (28) maintains a high level output for about 0.5 seconds from the stroke end point (T2) (Fig. 2 (d)),
Activate the electromagnetic solenoid (14) for about 0.5 seconds. On the other hand, the second timer circuit (29) operates at the stroke end point (
Maintain the high level for about 20 seconds from T2) (see Figure 2 (
Ho)).

Then, the electromagnetic solenoid (14) is actuated (T3
) Immediately after seedlings are supplied, the remaining seedling amount sensor (16) goes into a non-detecting state (see Figure 2 (a) and (f)), so the AND circuit (33) remains at a high level for only 0.5 seconds. Figure 2 (g)), buzzer (37) and lamp (38)
is driven instantaneously (only for about 0.5 seconds).

The above-mentioned operation is normal, but in any row, the seedling remaining amount sensor (16) is in the seedling presence state (that is, high level output state) even though the electromagnetic solenoid (14) is activated. If the abnormal operation occurs, it will occur as shown in Figure 2 (
As shown by the dotted line in (G), one input of the AND circuit (33) remains at a high level even after the activation time (T, ) of the electromagnetic solenoid (14), so the buzzer (37)
The lamp (38) continues to operate for approximately 20 seconds to alert the operator that an abnormality has occurred.

In this way, the automatic supply of spare seedlings is always performed only at the end of the stroke of the seedling table (3), so that it is possible to prevent the seedlings from collapsing due to the impact caused by the supply of seedlings.

The power supply switch (SW) for the seedlings and each control unit (26) is connected to the planting operation clutch lever (39) on the aircraft side.
The switch (SW) is turned on in conjunction with the operation to the planting work area, and each control section (26) is configured to operate only when necessary, in order to reduce power consumption. .

[Another example]

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

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 drawings]

The drawings show an embodiment of the preliminary seedling storage structure of the rice transplanter according to the present invention, and FIG. 1 is a control block diagram, FIG. 2 is a timing chart, FIG. 3 is a side view of the rear of the rice transplanter, and FIG. 5 is a vertical cross-sectional rear view of the preliminary seedling storage device, FIG. 6 is a vertical cross-sectional side view of the electromagnetic solenoid installation section, FIG. 7 is a plan view of the electromagnetic solenoid installation section, and FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7, and FIG. 9 is an overall side view of the rice transplanter. (3)... Seedling mounting stand, (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.

Claims (1)

[Claims] A seedling platform (3) is provided with an inclined position on which seedlings for planting are placed and moves back and forth in a constant stroke from side to side. A seedling remaining amount sensor (16) is provided to detect when the amount has decreased, and the seedling resting amount sensor (16) is provided above the seedling platform (3) and is locked to a locking member (15) provided on the side of the seedling platform (3). and a seedling supply state in which the locking member (15) releases the locking state and swings downward by actuation of the drive actuator (14). A reserve seedling accommodating device (11) is provided in a swingable manner, and after the detection operation of the remaining seedling amount sensor (16), the drive actuator (14) is operated to remove the reserve seedlings in the seedling placement state. The preliminary seedling storage structure of the rice transplanter is configured to switch the storage device (11) to the seedling supply state, and includes a stroke end detection sensor ( 25a) and (25b) are provided, and when the stroke end detection sensor (25a), (25b) operates after the remaining seedling amount sensor (16) detects it, the drive actuator (14) is actuated. A preliminary seedling accommodating structure for a rice transplanter, which is provided with a control means for switching the preliminary seedling accommodating device (11) to a seedling supply state.