JPH04330210A - Structure for pressing seedling of rush transplanter - Google Patents

Abstract

PURPOSE:To surely lower and transfer seedlings and sense the seedling supply period by installing a pressing plate for pressing the seedlings downward and providing a sensor operable when the pressing plate approaches the lower end part of the seedling carrier. CONSTITUTION:A pressing plate 13 is loosely fitted in a pair of left and right guide rods 14 and 14 installed in the direction parallel to the rush seedling transfer of the seedling carrier 4 and the back of seedlings is pushed with a pressure under which the pressing plate tends to lower by its own weight. A sensor 15 such as a limit switch is installed in an installing bracket (14A) of the guide rods 14. Thereby, the sensor is operated when the pressing plate approaches the lower end of the seedling carrier and an alarm lamp, etc., are lit.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling holding structure for pressing down the seedlings mounted on a seedling stand in a rush transplanter so that an effective planting condition is always maintained.

0002

BACKGROUND OF THE INVENTION Recently, rice transplanters have come into practical use.

0003

[Problems to be Solved by the Invention] Since strawberry seedlings cannot be formed into a mat shape like rice seedlings, divided seedlings must be fed to a seedling stand of a transplanter. By the way, since the divided strawberry seedlings are light with no soil attached to their roots (washable seedlings), they are not easily washed due to the lowering effect of their own weight due to the slope attached to the seedling stand and the lower end of the seedling stand due to the vertical feeding device. There was a risk that the forceful downward feeding action alone would not lower the seedlings enough, or that the seedlings would fall over during the planting process, resulting in missing plants during the planting process. An object of the present invention is to realize a seedling holding structure that can prevent the above-mentioned disadvantages from occurring.

0004

[Means for Solving the Problems] To achieve the above-mentioned object, the present invention provides a method for attaching a holding plate to the rearmost part of a group of rice seedlings to prevent them from falling over. The amount of remaining seedlings is detected by a holding plate that is movable along a guide member arranged along the transfer direction of the rice seedlings and is moved downward at a predetermined position near the lower end of the seedling platform. The feature of this configuration is that it is equipped with sensors for Further, it is advantageous if the guide member is configured to be able to swing upward and open about a fulcrum provided at its lower end, and the sensor is attached to the guide member.

[0005]

[Function] In the structure of claim 1, since a presser plate is newly installed to press the seedlings downward, a pressing force acts separately in addition to the conventional conveying force, and the total force of these forces reliably transports the seedlings downward. In addition, since the pressing force is applied from the rearmost part of the loaded seedlings, the pressing force is applied to all the loaded seedlings, and there is no possibility that some parts of the loaded seedlings will not be completely lowered. Since a sensor is provided that is activated when the holding plate comes near the lower end of the seedling platform, it is possible to detect that there are few remaining seedlings on the seedling platform based on the activation of the sensor. In other words, it was possible to provide the holding plate with two functions: the function of pressing down on the seedlings and the function of detecting the time to replenish the seedlings. Also, claim 2
With the configuration, the guide member can be swung upward and opened.
When replenishing seedlings, the guide member does not interfere with the replenishment work, and since the sensor also swings upward together with the guide member, the sensor does not interfere with the replenishment work.

[0006]

[Effects of the Invention] Therefore, in the rice grass transplanting machine according to claim 1, the seedling holding structure that can reliably feed the seedlings vertically and prevent the risk of missing plants or disordered planting posture is provided. We were able to provide it as a rational device that can be used as a device. In addition to the above-mentioned effects, the rice rush transplanting machine according to the second aspect also has the advantage that the work of replenishing seedlings can be performed more easily.

[0007]

Embodiments Below, embodiments of the present invention will be explained based on the drawings. The strawberry seedling transplanter shown in FIG.
This includes a seedling stand 4 that moves back and forth horizontally at a constant stroke with respect to a transmission case 3 that also serves as a frame, and a seedling stand 4 that cuts and plants seedlings one by one from a seedling outlet 5 at its lower end. It is equipped with an attaching mechanism 6, a plurality of ground leveling floats 7, and the like. At the bottom of the seedling mounting table 4, there is a vertical feeding device 8 of an endless rotary belt type with a protrusion that vertically feeds the seedlings placed thereon by a predetermined amount toward the seedling take-out port 5 at the stroke end of horizontal movement.
Above the planting mechanism 6, there is a seedling holding mechanism 11 that includes a holding claw 10 that enters the lower end of the seedling prior to the operation of the planting claw 9, and pushes it out toward the seedling removal port 5 and holds it there.
is provided.

As shown in FIGS. 3 and 4, the opening width at the tip of the planting claw 9 is 13 to 15 mm, and the distance between the tip of the pushing tool 12 and the tip of the planting claw 9 in the retracted position is 1
They are each set to 0 to 15 mm.

Next, the seedling holding structure will be explained. Figure 1
As shown in FIG. 2, in order to prevent the seedlings mounted on the seedling platform 4 from falling down, a holding plate 13 is arranged parallel to the direction in which the seedlings are transferred on the seedling platform 4, and pushes the group of seedlings from the rear end. A pair of left and right guide rods (corresponding to guide members) 14, 14 are loosely fitted to each other, and are slidable along the guide rods 14, and are an integral part whose front ends are connected. 14 is configured to be able to swing upward and open about a left-right shaft-shaped fulcrum P provided at its lower end. In other words, the loaded seedlings are pushed back by the pressing force of the holding plate 13 trying to descend due to its own weight. The pair of guide rods 14 are integrally connected at their upper ends in a U-shape when viewed from above. A limit switch 15 consisting of a contact type microswitch is attached to a mounting bracket 14A of the guide rod 14 having a fulcrum P, and its contact piece 16 is projected onto the transfer path of the guide rod 14. That is, a sensor for detecting the amount of remaining seedlings is configured by a limit switch 15 that is activated by contacting the presser plate 13 that is moving downward, at a predetermined position near the lower end of the seedling platform 4. 15, it is possible to detect that the number of remaining seedlings is low and it is time to replenish the seedlings. It is effective if the operation of the limit switch 15 lights up a warning light on the control section (not shown). Lead wire 1 of limit switch 15
7 is wired in such a manner that it can be loosened from a stay 19 protruding from the support wall 18, considering that the limit switch 15 is also oscillatedly moved together with the guide rod 14. As a sensor for detecting the amount of remaining seedlings, in addition to the above-mentioned limit switch, various sensors such as an optical type or an electromagnetic type non-contact sensor can be used.

[0010]Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Side view of the planting device part

[Fig. 2] Partially cutaway rear view showing the structure of the guide rod support and the state in which the presser plate is attached.

[Figure 3] Plan view showing the planted nail part

[Figure 4] Side view showing the planted nail part

[Explanation of symbols]

4 Seedling stand 13 Presser plate 14 Guide member 15 Sensor P Fulcrum

Claims (2)

[Claims] Claim 1: In order to prevent the rice seedlings mounted on the seedling platform (4) from falling down, a holding plate (13) is installed to push the rice seedlings from the rear end of the group to prevent the rice seedlings on the seedling platform (4) from collapsing. The holding plate (13) is movable along a guide member (14) arranged along the transfer direction, and is moved downward to a predetermined position near the lower end of the seedling platform (4). )
The seedling holding structure of the rice grass transplanter is equipped with a sensor (15) for detecting the amount of remaining seedlings that is activated by the following. 2. The guide member (14) is configured to be able to swing upward and open about a fulcrum (P) provided at its lower end, and the sensor (15) is attached to the guide member (14). A seedling holding structure for a rice grass transplanter according to claim 1.