JPS6211373Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the invention that
This invention relates to a seedling rest device equipped with a switch for detecting that the number of loaded seedlings has decreased to a certain amount or more by means of the elastic projection displacement of a wide seedling sensing piece elastically biased to project from the seedling resting surface side.

Generally, the pine-shaped seedlings placed on the seedling stand are
A large number of soft roots grow on the lower side of the soil part of the seedling bed, forming a cushion-like shape.

Therefore, in a system that uses a wide seedling sensing piece to detect when the number of mounted seedlings has decreased by a certain amount or more, the contact resistance caused by the roots prevents the seedling sensing piece from coming into contact with the soil of the seedling bed, which prevents the seedling from touching the seedling. It is difficult to determine the contact position of the sensing piece, and the seedling sensing piece is likely to move within the root layer due to vibrations of the machine, leading to a risk of malfunction.

Therefore, it may be possible to use a thin seedling sensing piece that scrapes through the soft roots and comes into contact with the soil of the seedling bed, but generally this seedling sensing piece is biased upward to detect the presence or absence of seedlings. Therefore, if the bed soil is soft, there is a risk that the seedling sensing piece may dig into the bed soil part too much, causing false detection or destroying the bed soil part of the seedlings.

By devising the shape of the seedling sensing piece, this invention allows for good sensing of seedlings regardless of the hardness or softness of the soil in the seedling bed, and also prevents lateral displacement of seedlings due to horizontal movement of the seedling stand. It is an object of the present invention to provide a seedling stand device that can effectively suppress the growth of seedlings.

The characteristic structure of this invention to achieve the above purpose is as follows:
The seedling contacting surface of the wide seedling sensing piece is provided with a protruding ridge having a width smaller than the width of the sensing piece and extending along or almost along the direction of sending out the seedlings. It has the following effects.

That is, by providing the protrusions on the wide seedling sensing piece, the protrusions push aside the soft roots and come into contact with the soil surface of the seedling bed. Therefore, there is little risk that the seedling sensing piece will malfunction due to body vibration or the like.

If the bed soil for the seedlings is soft, the wide surface of the seedling sensing piece will experience contact resistance from the roots, preventing the protrusions from digging into the bed soil more than necessary, leading to erroneous sensing. The occurrence of collapse in the soil part of the seedling bed is suppressed.

Furthermore, as mentioned above, by providing a protrusion on the wide seedling sensing piece, the protrusion digs into the soil of the seedling bed, and when the seedling tray changes direction at the end of the reciprocating horizontal movement. It can effectively suppress the inertial lateral movement of the loaded seedlings, and it acts as a seedling lateral displacement prevention function to prevent the seedlings from shifting laterally, thereby suppressing troubles such as a reduction in the amount of seedlings taken out and missing plants. can do.

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, at the rear of the traveling body A, which is equipped with a spare seedling rack device 2 on both the left and right sides of the engine bonnet 1, is a forward-leaning position that can freely reciprocate in the left and right directions. A 5-row planting device B has a seedling stand 3 and three ground floats 4 that can be vertically oscillated within a certain range using the rear end side as a fulcrum. It is connected and supported so that it can be raised, lowered and rolled freely via a hanging link mechanism 6, and a seedling take-out port 7 on the lower surface of each seedling resting part 3A of the seedling resting stand 3 is connected and supported.
The seedling resting part 3A is located near the seedling resting part 3A by elastically protruding wide seedling sensing pieces 8A, 8A which are biased to protrude elastically toward the seedling resting surface 3a, respectively, on the left and right sides of the seedling resting part 3A. The switches 8, 8 for detecting that the number of seedlings mounted on the seedlings 3A has decreased to a certain amount or more are installed with appropriate displacement in the seedling feeding direction, and both switches 8, 8 of each seedling loading section 3A are In the riding rice transplanter, a warning lamp 9 that lights up when the detection is activated is attached to a travel indicator 10 that is installed upright in the center of the front width of the engine bonnet 1, and each of the seedling sensing pieces 8A, 8A seedling contact surface 8a,
These seedling contact surfaces 8a, 8a are placed in the center of the width of 8a, respectively.
The protrusions 11, 11 are provided in a protruding manner and have a width smaller than that of the seedlings and are oriented along the direction of sending out the seedlings.

For seedlings with hard bed soil, the seedling sensing piece 8A has its narrow ridges 11 that scrape apart the cushion-like roots that are exposed in large quantities on the bottom of the bed soil of the seedling. Only the tips come into contact, and the presence of the seedlings is reliably detected, and the contact resistance is low, and the mounted seedlings slide on the seedling sensing piece 8A, so that the downward feeding of the seedlings is not hindered. In addition, for seedlings whose bed soil is soft, the protrusions 11 dig into the bed soil, but the wide surface of the seedling sensing piece 8A itself receives contact resistance from the roots, causing it to dig into the bed soil more than necessary. This prevents undue collapse of the soil floor.

Further, since the tip of the protrusion 11 linearly contacts or bites into the bottom surface of the seedbed soil portion, lateral displacement of the loaded seedlings due to inertial force or the like at the end of the lateral movement of the seedling platform 3 is suppressed.

Further, among the grounding floats 4, the grounding float 4 located at the center of the width of the aircraft body is configured to also serve as a grounding sensor for detecting changes in the grounding pressure of the sensor float 4. A hydraulic cylinder 13 installed between the traveling body A and the parallel quadruple link mechanism 5 is used to maintain the ground pressure constant or almost constant based on the vertical swing above a certain level. The planting device B is configured to be automatically controlled to drive up and down.

In addition, as shown in FIGS. 4 and 5, a pair of left and right ribs 12, 12 are fixed to the front lower surface of the sensor float 4 to guide the mud down to the lower surface of the float, and the grounding floats 4 on both the left and right sides ,4
Ribs 12, 12 and 12, 12 similar to those described above are also fixed to the lower front surface of the.

The preliminary seedling stand device 2 is constructed as follows.

That is, as shown in FIG. 6, a pair of front and rear main columns 14A, 14B are installed upright from the frame of the traveling body A.
Three preliminary seedling resting tables 16 on which the preliminary seedling supply boards 15 can be placed and supported are fixed at appropriate intervals in the vertical direction, and the Then, each of these spare seedling stands 1
L-shaped protrusions 17A that can be fitted into engagement holes 15a formed in the preliminary seedling supply plate 15 from below through through holes 16a formed in 6...
A locking member 17 having... is provided so as to be slidable between a locking position and an unlocking position in which the L-shaped protrusion 17A is disengaged downward from the engagement hole 15a of the spare seedling supply plate 15, An operating tool 19 linked to the locking member 17 via an L-shaped link 18 is attached to the rear column 14B so that it can be slid between a locking operation position and an unlocking operation position, and can be fixed thereto.

Incidentally, the protrusion 11 may be configured as shown in FIGS. 7A to 7C. That is, the one shown by A is one in which the upper end of the protrusion 11 is configured in a tapered shape,
The one shown by ``B'' has the protrusion 11 having a triangular cross section, and the one shown by ``C'' has protrusions 11, 11 fixed to both ends of the width of the seedling sensing piece 8A.

Further, the number of the switches 8 to be installed may be set appropriately.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the seedling rest device according to the present invention, in which FIG. 1 is an overall side view of the riding rice transplanter, FIG. 2 is an enlarged view of the main parts of the inclined seedling rest, and FIG. 4 and 5 are side views and bottom views of the float, FIG. 6 is a perspective view of the preliminary seedling rest device, and FIGS. 7A to 7C show other embodiments, respectively. FIG. 3 is an enlarged sectional view of the main parts shown. 3...Slanted seedling stand, 8...Switch, 8A...
...Seedling sensing piece, 11...projection.

Claims (1)

[Scope of Claim for Utility Model Registration] A wide seedling sensing piece 8A that is elastically protruded and biased toward the seedling placement surface near the seedling take-out port of the inclined seedling placement table 3 is elastically protruded and displaced, so that the loaded seedlings are In a seedling mounting stand device equipped with a switch 8 that detects when the amount has decreased to a certain level or more, a seedling contact surface of the wide seedling sensing piece 8A is provided with a seedling feeding plate having a width smaller than the width of the sensing piece and a seedling feeding device. A seedling stand device characterized by having protrusions 11 protruding along or substantially along the direction. The seedling rest device according to claim 1, wherein the protrusion 11 is provided at the center of the width of the seedling sensing piece 8A.