JPH0763258B2 - Rice transplanter seedling supply device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is provided with a seedling feeding mechanism for feeding a mat-like seedling placed on a seedling stand to a seedling planting mechanism below by a predetermined amount. In addition, the present invention relates to a seedling supply device for rice transplanters, which is provided with a remaining amount sensor that detects that the remaining amount of mat-like seedlings has fallen below a set amount.

[Conventional technology]

As a seedling supply device for rice transplanters, for example, Shoukai 57-1008
As disclosed in Japanese Unexamined Patent Publication No. 33-33 and Japanese Utility Model Laid-Open No. 60-46825, there is one using a conveyor belt with protrusions as a seedling feeding mechanism.

In the seedling feeding device, when the mat-shaped seedlings on the seedling stand are consumed and the remaining amount becomes equal to or less than the set amount, the remaining amount sensor detects this as shown in the above-described conventional example structure, and the operator The operator will be informed by using an alarm device, etc., and the pilot will insert a spare seedling prepared for the aircraft from the upper end of the seedling stand to replenish it.

At this time, the tip (lower end) of the supplemented seedling may be caught by the projection at the start end (upper end) of the conveyor belt and may not be inserted properly. Therefore, as shown in the above-mentioned conventional example, a means for retracting the upper end side of the conveyor belt to the lower part of the seedling placing surface of the seedling placing table by operating the hand lever, and inserting the supplementary seedling without the above catch is proposed. It has been done.

[Problems to be Solved by the Invention]

However, in the conventional means as described above, it is necessary to operate the lever at the bottom every time the seedling is replenished and to retreat the conveyor belt below the surface of the seedling, so the operation is troublesome and the spare seedling is forgotten to operate. There were many times when I inserted.

Then, when the carrying belt is withdrawn and operated by knowing that the preliminary seedling is caught by the starting end of the projecting conveyor belt and cannot be inserted, the projection of the carrying belt may scrape the tip of the preliminary seedling greatly. There is a conveyor belt withdrawal means to facilitate the supplementary seedling supply, but the handling thereof requires caution.

The present invention has been made in view of such an actual situation, and provides a seedling supply device capable of smoothly and satisfactorily supplying preliminary seedlings without using the above-mentioned problem, in a case where a conveyor belt with protrusions is used as a seedling feeding mechanism. The purpose is to do.

[Means for Solving the Problems]

The feature of the present invention is that in the seedling feeding device of the rice transplanter having the above-mentioned configuration, the seedling feeding mechanism is automatically retracted to the lower side of the seedling stand based on the detection of the absence of seedling by the remaining amount sensor. Along with, based on the detection of the seedling presence of the remaining amount sensor by the seedling replenishment, provided with an automatic withdrawal means for automatically projecting the seedling feeding mechanism to the upper side of the seedling stand, further, the remaining amount sensor and the When the remaining amount sensor detects the presence of seedlings by the seedling replenishment between the automatic withdrawal means, the seedling feeding mechanism is moved upward and returned after a lapse of a set time required for the seedlings to be replenished to a predetermined position. Is provided with a drive circuit for outputting a command signal for the purpose, and its operation and effect are as follows.

[Work]

That is, when the remaining amount sensor detects that the amount of mat-like seedlings on the seedling placing table has become less than or equal to the set amount, the seedling feeding mechanism automatically retreats to the lower side of the seedling placing table. There is no locking material for the seedlings on the seedling mounting surface of the stand, and the supplemented seedlings can be supplied to the rear end position of the remaining seedlings very smoothly.

In addition, even when the remaining amount sensor detects the presence of seedlings during seedling replenishment, the seedling feeding mechanism is not immediately moved back to the upper side, so that the seedling feeding mechanism does not hinder the seedling feeding.

〔The invention's effect〕

Therefore, according to the present invention, prior to the seedling supply on the seedling stand, it is possible to smoothly supply seedlings without any troublesome work and without damaging the spare seedlings. became.

〔Example〕

As shown in FIG. 4, the seedling planting device (4) is movably connected to the rear portion of the riding type traveling body (1) via a link mechanism (3) which is rockably operated by a hydraulic cylinder (2). At the same time, the riding type rice transplanter is configured so that the power from the traveling machine body (1) is transmitted to the seedling planting device (4) via the PTO shaft (5).

The seedling planting device (4) is provided with a seedling planting mechanism (7) at the rear of the transmission case (6) also serving as a support frame, and a seedling stand () for mounting a mat-like seedling (W). 8)
And a grounding float (9) in the lower part, and a mat-shaped seedling (W) is formed in the lower middle part of the seedling stand (8).
A seedling feeding mechanism (10) for intermittently feeding the seedlings to the seedling planting mechanism (7). The seedling stand (8) is
By a drive mechanism (not shown) in the transmission case (6), it is laterally slid to the left and right with a constant stroke, and at the stroke end of the seedling stand (8), the seedling feeding mechanism (10) drives the mat-like seedlings (W). A predetermined amount corresponding to a single planting amount is fed toward the planting mechanism (7).

As shown in FIG. 1 and FIG. 3, the seedling feeding mechanism (10) conveys two rods with a projection (12) between a pair of upper and lower rollers (11a) and (11b) for each line. Belt (13a), (1
3b) is wound and stretched, and the lower roller (11
The drive shaft (14) is fitted into b) so that the rotary power can be transmitted, and the drive shaft (14) is configured to be intermittently rotationally driven by a drive system (not shown) as described above. 13
The driven support shaft (15), which supports the upper rollers (11a) of (a) and (13b) in an idle manner, is supported by a pair of left and right operation members (16) and (16) so as to be vertically movable. As shown in FIG. 1, by setting the driven support shaft (15) on the upper side, the projection (12) is provided over the entire area between the upper and lower rollers (11a), (11b).
Is in the normal seedling feeding state where the seeds project from the seedling stand (8),
As shown in FIG. 2, by displacing the driven shaft (15) downward, the projections (12) are located below the seedling stand (8) in many parts between the upper and lower rollers (11a), (11b). When the mat-shaped seedlings (W) on the seedling stand (8) are low and the seedlings are replenished because the remaining amount of matte seedlings (W) becomes small, the seedlings are caught on the starting end of the conveyor belt (13). To prevent this.

As shown in FIGS. 1 to 3, the remaining amount of mat-like seedlings (W) on the seedling stand (8) in the middle of the left and right conveyor belts (13a), (13b) has become less than the set amount. A remaining amount sensor (17) for detecting this is provided. The remaining amount sensor (17) is a limit switch (17a) supported by a support member (18) fixed to the lower surface of the seedling stand (8) and an upward projection from the opening (20) of the seedling stand (8). And a rocking detecting piece (17b) which is urged by a spring so as to move downward and rock under the weight of the seedling (W). In other words, if there is no seedling (W) in that part, the rocking detection piece (17b)
Oscillates upward due to the spring force, and the limit switch (17
The indicator lamp (22) provided in the operating part (21) of the traveling vehicle body (1) is configured so that a) is activated.
Lights up to inform the driver of this.

When the remaining amount sensor (17) detects that there is no seedling, the seedling feeding mechanism (10) is automatically retracted to the lower side of the seedling stand (8) based on the detection, When the remaining amount sensor (17) detects the presence of seedlings along with the replenishment, the seedling feeding mechanism (10) is automatically projected to the upper side of the seedling stand (8) based on the detection. An automatic access means (27) is provided. That is, as shown in FIG.
Operation members (16), (16) for supporting the driven shaft (15)
Is vertically pivoted around a horizontal axis (P ₁ ) on support brackets (23) and (23) mounted and fixed below the seedling stand (8), and is formed on the swing end side thereof. Long holes (24), (24)
Further, it is internally fitted and supported to receive the hexagonal driven shaft (15). Further, the support brackets (23), (23) are formed with engagement recesses (25) for restricting the vertical movement range of the driven support shaft (15). Then, the screw shaft (33) of the forward / reverse rotation motor (32) is screwed into the female screw member (34) pivotally attached to the operation members (16) and (16), and the operation is performed by the forward / reverse rotation motor (32). The members (16) and (16) are rockably operated so that the seedling feeding mechanism (10) can freely move in and out of the seedling placing table (8). Then, the female screw member (34) is screwed between the remaining amount sensor (17) and the forward / reverse rotation motor (32) in accordance with the detection operation of the remaining amount sensor (17) that there is no seedling. Axis (3
When the seedling feeding mechanism (10) is retracted to the lower side by screwing with respect to 3), seedlings are replenished and the remaining amount sensor (17) detects the presence of seedlings, after a predetermined time has elapsed That is, a drive circuit (35) is provided that outputs a command signal for moving and returning the seedling feeding mechanism (10) to the upper side after a set time required to replenish the seedlings to a predetermined position has elapsed.

[Another embodiment]

The automatic retracting means may be hydraulically driven.

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 the seedling feeding device of the rice transplanter according to the present invention. Fig. 1 is a side view of a main part in a state in which the seedling feeding mechanism is set upward, and Fig. 2 is the seedling feeding mechanism retracted downward. FIG. 3 is a side view of the main part of the state, FIG. 3 is a plan view of the seedling feeding mechanism, and FIG. 4 is a side view of the entire rice transplanter. (7) …… Seedling planting mechanism, (8) …… Seedling stand, (10)…
… Seedling planting mechanism, (17) …… Remaining amount sensor, (27) …… Automatic exit / withdrawal means, (35) …… Drive circuit, (W) …… Matt seedling.

Claims (1)

[Claims] 1. A seedling feeding mechanism (10) for feeding a mat-shaped seedling (W) placed on a seedling stand (8) toward a seedling planting mechanism (7) below by a predetermined amount. , A seedling supply device of a rice transplanter provided with a remaining amount sensor (17) for detecting that the remaining amount of mat-like seedlings (W) has fallen below a set amount, the seedling of the remaining amount sensor (17) Based on the detection of the absence, the seedling feeding mechanism (10) is automatically retracted to the lower side of the seedling stand (8) and the presence of the seedling is detected by the remaining amount sensor (17) by the seedling supply. On the basis of this, an automatic withdrawal means (27) for automatically projecting the seedling feeding mechanism (10) above the seedling stand (8) is provided, and further, the remaining amount sensor (17) and the automatic withdrawal It is necessary for the seedlings to be replenished to a predetermined position when the remaining amount sensor (17) detects the presence of the seedlings between the means (27) and the means (27). Wherein after the lapse extent set time seedling feeding mechanism (10) seedlings supply apparatus rice transplanter which is provided with a driving circuit (35) for outputting a command signal for moving back to the upper side.