JP2635220B2 - Rice transplanter seedling supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projecting belt for feeding a seedling placed on a seedling rest toward a lower seedling planting mechanism by a predetermined amount, and is wound around the back of the seedling rest. The present invention relates to a seedling supply device for a rice transplanter, which is extended and exposed from an opening formed in the seedling rest and provided with a seedling amount sensor for detecting that the remaining amount of the seedling has become a set amount or less. .

[0002]

2. Description of the Related Art Conventionally, as a seedling supply device for a rice transplanter of this kind, for example, as disclosed in JP-A-63-164804 and JP-A-1-202213, On the basis of the detection result, the lower end of the conveyor belt retreats to the lower side of the seedling placing table with the lower end of the conveyor belt centered around the rotation axis of the seedling, so that the lower end of the replenishment seedling does not catch on the protrusion of the conveyor belt. Is known that can be smoothly inserted and supplied.

[0003]

However, in the above-mentioned conventional structure, the transport belt for holding the position of the seedlings remaining on the seedling mounting table at the time of replenishing the seedlings, retreats downward. Therefore, since the position holding action for the remaining seedlings works only at the roller at the lower end of the conveyor belt, the remaining seedlings are likely to be unduly displaced. In particular, if the lower end row of the remaining seedlings is harvested to some extent and a gap is formed between the lower end of the remaining seedlings and the lower end receiving portion of the seedling rest, the remaining seedlings may slip down. was there.

[0004] Therefore, in the above-mentioned conventional structure, when the lower end of the supplied seedling comes in contact with the upper end of the remaining seedling when the seedling is replenished, the remaining seedling may slip downward or rise from the seedling rest. Malfunctions are more likely to occur,
There is a possibility that seedling removal by the seedling planting mechanism, and eventually planting failure, may occur. Further, as shown in FIG. 5, the transport belt 31 is fixed in position with respect to the seedling mounting table 32 to secure the position of the remaining seedlings and to facilitate the supply of the seedlings. A plurality of tension rollers 34,... Are provided in the middle of the conveyance operation range of the conveyance belt 31 and in a portion of the conveyance belt 31 on the lower side of the conveyance from the seedling quantity sensor 33 so as to sufficiently hold the remaining seedling Wa. It is conceivable to provide a tension roller, a guide, or the like in a portion of the belt 31 closer to the upstream side of the seedling amount sensor 33 than the seedling amount sensor 33 in order to weaken the resistance of the projection a of the conveyor belt 31 to the supply seedling Wa. Although sufficient retention can be ensured, the seedling quantity sensor 33
The protrusion a of the transport belt 31 on the more transport side is the seedling mounting surface A
Since it faces upwards, it also acts as a resistance to the replenished seedlings Wa, so that there is a large possibility that a gap is formed between the remaining seedlings Wa and the replenished seedlings Wb. There is a disadvantage that it takes time.

[0005] The present invention has been made in view of the above-described circumstances, and it is possible to maintain a sufficient position of a seedling remaining on a seedling mounting table at the time of replenishing seedlings, while maintaining a sufficient distance between the replenished seedlings and the remaining seedlings. It is an object of the present invention to provide a seedling supply device of a rice transplanter that can smoothly and easily insert and replenish replenishing seedlings without causing a gap.

[0006]

According to the present invention, there is provided a seedling supplying apparatus for a rice transplanter, comprising a conveying belt having a projection for feeding a seedling placed on a seedling mounting base by a predetermined amount toward a seedling lowering mechanism. Is wound around the back of the seedling rest to be exposed through an opening formed in the seedling rest, and a seedling quantity sensor for detecting that the remaining amount of the seedling is less than a set amount. In the seedling supply device of the rice transplanter provided with the above, the detection position of the seedling amount sensor is set at the middle of the conveying operation range of the conveyor belt, and the remaining amount of the seedling in the seedling amount sensor has become equal to or less than a set amount. Based on the detection result, stops so as to be able to hold the seedling lower side than the detection position of the seedling amount sensor on the conveyor belt, and is on the conveyance upper side than the detection position of the seedling amount sensor on the conveyor belt. Seedling transport and stop Wherein configuration that it is provided with an action state switching means for switching to a non-activated condition releasing the action. The operation and effect of this characteristic configuration are as follows.

[0007]

In other words, the detection position of the seedling amount sensor is set in the middle of the conveying action range of the conveyor belt, and based on the detection result that the remaining amount of the seedling has become less than the set amount by the seedling amount sensor, Stopped so that it could hold the seedlings on the lower side of the transport belt from the detection position of the seedling quantity sensor, and released the seedling transport and stop action on the upper side of the transport belt from the detection position of the seedling quantity sensor. Since the state can be switched to the state, the conveyor belt on the lower side of the conveyance from the detection position of the seedling amount sensor can be left exposed from the opening of the seedling mounting table, and the protrusion of the conveyance belt is engaged with the lower part of the remaining seedling. It can be stopped and maintained in the stopped position holding state. Thus, even if the seedlings are collected to some extent and a gap is formed between the lower end of the remaining seedlings and the lower end receiving portion of the seedling rest, the remaining seedlings do not slip down. Then, at this time, the replenished seedlings inserted from above the seedling rest stand abut on the upper end of the remaining seedlings without the protrusion of the transport belt on the transporting upper side from the detection position of the seedling quantity sensor becoming a resistance. It can be supplied smoothly up to the point.

[0008]

Therefore, the remaining seedlings at the time of replenishing the seedlings are held in a sufficient position by the projections on the lower side of the conveyance belt relative to the seedling quantity sensor, so that the lower end of the replenished seedlings contacts the upper end of the remaining seedlings. Even if the remaining seedlings are unduly misaligned, the replenished seedlings can be smoothly and easily inserted without receiving resistance from the projections of the conveyor belt until they contact the remaining seedlings. A gap was not created between the remaining seedlings and the replenished seedlings, and poor planting due to poor replenishment could be suppressed.

[0009]

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

As shown in FIG. 4, a plurality of seedling planting apparatuses 4 are connected to the rear part of the riding type traveling body 1 via a link mechanism 3 which is swingably operated by a hydraulic cylinder 2 so as to be movable up and down. The riding type rice transplanter is configured to transmit the power from the traveling machine body 1 to the seedling planting device 4.

The seedling planting apparatus 4 includes a seedling planting mechanism 6 at the rear of a transmission case 5 also serving as a support frame, and a plurality of pot seedlings W grown in a vertically and horizontally arranged pot.
7 for placing seedlings and ground float 8 at the bottom
It comprises. As shown in FIGS. 1 and 3, the seedling rest 7 for each strip is placed at the stroke end of the seedling rest 7, which is reciprocally slid at a constant stroke by a drive mechanism (not shown) in the transmission case 5. A transfer belt 9 with a projection for feeding out the pot seedling W placed on the seedling 7 toward the seedling planting mechanism 6 below by one pot is provided on an upper roller 10a and a lower roller 10
A pair of right and left windings are stretched over b. Then, the conveyor belt 9 is exposed from an opening 11 formed in the seedling rest 7. The transport belt 9 is provided with a lower roller 10.
The drive shaft 12 is driven by rotational power transmitted from a drive system (not shown) from the transmission case 5 to the drive shaft 12.

Upper roller 1 of the conveyor belt 9
As shown in FIG. 1, the seedling transfer operation surface of the transfer belt 9 is positioned between the lower roller 10 b and the lower roller 10 b at a substantially central position in the seedling transfer direction. A guide roller 13 for causing the seedling 7 to follow the seedling surface A is movably fixed. A pair of left and right brackets 15, 15 attached to the back of the seedling rest 7 are provided with driven shafts 14, which rotatably support upper rollers 10 a of a pair of right and left conveyor belts 9. It is stopped and inserted. The long holes 16 are formed along an arc centered on the rotation axis P of the guide roller 13 in a side view, and as shown in FIGS. However, it is possible to swing around the rotation axis P between a position where the belt seedling transfer surface is exposed from the seedling mounting surface A of the seedling mounting base 7 and a position where the belt seedling mounting surface retreats to the lower side, that is, the back side of the seedling mounting base 7. Make up. The driven support shaft 14 is linked to an operation lever 23 supported on the seedling rest 7 by a toggle mechanism so as to be able to switch between two positions and swinging. The operation lever 3 and the toggle mechanism convey the conveyance belt 9. The upper part can be switched to one of the two postures, and can be held in the switched posture. Here, the operation lever 16 and the toggle mechanism are retreated to the lower side of the seedling placing table 7 so that the upper side of the conveying belt 9 is set to the non-operating state in which the stopping operation for the conveying operation and the holding of the seedling is released. It constitutes the operation state switching means 22 which can be turned on. In the portion of the conveyor belt 9 below the guide roller 13 on the lower side of the conveyance, the seedling conveying surface is fixed in a posture exposed from the seedling placing surface A.

As shown in FIGS. 1 to 3, the seedling rest 7 for each strip is located at the center of the pair of left and right conveyor belts 9, 9 on the right and left sides, and slightly above the guide rollers 13. And a seedling quantity sensor 17 that can detect the presence or absence of the pot seedling W at that position. The seedling amount sensor 17 is spring-biased so as to protrude upward from the opening of the seedling pedestal 7, and is moved downward by the weight of the pot seedling W. And a swing detection piece 17b to be inserted. That is, when the remaining amount of the pot seedling W becomes smaller than the installation position of the seedling amount sensor 17, the swing detecting piece 17b is swung upward by the spring force to operate the limit switch 17a. As a result, the driving unit 19 of the traveling body 1
Is turned on, or an audio alarm device is operated to notify the driver of the decrease in seedling volume.

Therefore, according to the above configuration, the seedling amount sensor 1
When the detection operation of 7 is performed, the display lamp 20 or the voice alarm device performs the notification operation based on the detection result to urge the driver to replenish the seedlings. Then, when supplying the seedlings, the driver switches the operation lever 23 to switch the upper side of the conveyor belt 9 to the lower side of the seedling nest 7 so that the auxiliary belt 21 is replenished. The seedlings W are inserted into the seedling placing table 7 and supplied. At this time, the seedling amount sensor 1 of the conveyor belt 9
7 The pot seedlings W remaining on the lower side of the conveyance from the installation position are:
The replenishment seedling Wb inserted and replenished is held until the lower end of the replenishment seedling Wb and the upper end of the remaining seedling Wa are brought into contact with each other. The seedling placement surface A slides down.

The present invention may be implemented as follows. (A) An actuator and a control means are provided so that the conveyor belt, which is on the upper side of the conveyance, from the detection position of the seedling amount sensor is automatically retracted below the seedling mounting base based on the detection result of the seedling amount sensor. Configuration. (B) The detection position of the seedling amount sensor is set to be substantially the same as the reciprocating center position of the retreating upper side portion of the transport belt in the transport direction. (C) The guide roller 13 is configured to be position-adjustable in the seedling transfer direction so that the range in which the remaining seedling Wa in the conveyor belt 9 can be held can be changed. (D) Use a mat-shaped seedling as the seedling W.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view showing a seedling supply device in a normal use state.

FIG. 2 is a side view showing the seedling supply device when supplying seedlings.

FIG. 3 is a rear view showing the seedling supply device.

FIG. 4 is an overall side view showing a riding type rice transplanter.

FIG. 5 is a side view showing a seedling supply device as a comparative example.

[Explanation of symbols]

 6 Seedling plant 7 Seedling stand 9 Conveyor belt 11 Opening 17 Seedling quantity sensor 22 Working state switching means W Seedling

Claims (1)

(57) [Claims] 1. A seedling (W) placed on a seedling stand (7)
Is rolled around the back of the seedling rest (7), and a conveyor belt (9) having a projection for feeding the seedling toward the lower seedling planting mechanism (6) by a predetermined amount is stretched around the seedling rest (7). ), And is provided with a seedling quantity sensor (17) for detecting that the remaining amount of the seedling (W) has become equal to or less than a set amount. there, sets the detection position of the seedling weight sensor (17) in the middle of the transport working range in the conveyor belt (9), the seedlings amount
The remaining amount of the seedling (W) in the sensor (17) is equal to or less than a set amount.
Based on the detection result that the conveyor belt has fallen,
From the detection position of the seedling quantity sensor (17) in (9)
Is stopped so that the lower side of the transport can hold the seedlings.
Detection position of the seedling quantity sensor (17) at the default (9)
The transporting and stopping of the seedlings on the side of
Operation state switching means (22) for switching to an operation state is provided.
Seedling supply device for rice planting machine, characterized in that it is.