JP2003125614A - Automatic sowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sowing machine having high reliability and improved sowing efficiency, capable of accurately sowing at a prescribed sowing position with simple parts and producible at a low cost. SOLUTION: The automatic sowing machine for the automatic sowing on a relatively moving culture medium is provided with a groove for moving seeds in aligned state, a sensor attached to a part of the groove and detecting the quantity of the seeds, a seed supplying means to keep the quantity of the seeds in the groove constantly at the optimum level based on the signal transmitted from the sensor, a stopper attached to the tip end of the row of the moving seeds and selecting the seed to be sowed, a controlling means to apply a weak vibration to the groove at a vibration intensity to enable the motion of the seeds in aligned state, a counting means to count the vibration frequency of the controlling means and another controlling means to apply a strong vibration having an intensity to cause the jump of the seed over the stopper when the counted number reaches a prescribed sowing count.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic sowing apparatus capable of sowing seeds on a cultivated soil with high efficiency.
The present invention relates to a precision automatic sowing apparatus for sowing various types of seeds at accurate positions and in accurate quantities. 2. Description of the Related Art The above-mentioned sowing apparatus performs an operation of precisely sucking a seed from a seed dish with a thin suction needle to a tip of the seed dish and dropping the seed by pressurized air at a sowing position to accurately fix the seed. There is a vacuum automatic seeding device. [0003] In the seeding apparatus having the above-mentioned structure, foreign substances such as dust are easily clogged in the suction needles, and the cleaning operation is stopped after stopping the machine. There is a problem that monitoring is indispensable to prevent defects, and a solution is desired. An object of the present invention is to provide a high-performance precision automatic sowing apparatus for fundamentally removing troubles caused by suction needles and sowing various kinds of seeds accurately. [0005] In order to solve the above-mentioned problems, the seeding apparatus of the present invention arranges and moves seeds in an automatic sowing apparatus that automatically sows a relatively moving medium. A groove and a sensor for detecting the amount of seed are provided in a part of the groove, and a seed replenishing means is provided for always keeping an appropriate amount of seed in the groove based on a signal from the sensor. Providing a stopper for selecting seeds, a control means for giving a weak vibration of moderate strength to the seeds to align and move the grooves, a counting means for counting the frequency, and selected when the frequency reaches the seeding count An automatic sowing apparatus characterized by providing a control means for giving a strong vibration in which the seeds are sown beyond the stopper, so that there is no need for vacuum suction by a suction needle for selecting the seeds to be sown. No failure occurs at all. In addition, the seed handling part consists of a few simple parts,
Since the portion related to the operation of selectively sowing seeds is implemented by a highly reliable electronic circuit, the entire device is compact, easy to use, and economically enduring long-term use. [0006] The groove for aligning and moving the seeds may be determined in accordance with the sowing amount of the seeds. For example, when the seeding amount per seed is one, the grooves should be wide enough to align and move one seed. In addition, a cover can be provided above the groove in order to prevent the seeds inside from being vertically overlapped. [0007] The amount of seeds in the ditch must be accurately maintained so that the seeds are aligned and proceed without overlapping. For that purpose, a sensor for constantly detecting the amount of seed in the groove and a seed replenishing means for maintaining an appropriate amount are required. Then, the seeds that are aligned and advanced are stopped by the stopper at the end of the progress, stay there, and stop the entire alignment movement. The vibration required for this alignment movement may be weak, and varies depending on the seed, but is approximately 0.
It may be about 1 to 0.5 mm. Frequency is 20-100 per second
About times. For example, when sowing 5 seeds per second,
1 for every 10 counts for 50 weak vibrations per second
One strong vibration is given, and only one seed staying in front of the stopper jumps over the stopper due to the strong vibration, and is selectively sown. The magnitudes of the weak vibration and the strong vibration need to be accurately controlled, and are determined by the size and shape of the seed with respect to the groove and the stopper shape. Therefore, when sowing various kinds of seeds, the optimal control conditions for the seeds to be sown are stored in the electronic circuit storage device, and are arbitrarily called and accurately reproduced. 1 and 2 show a cross section of a sowing apparatus according to the present invention. Seeding points 13 on the relatively moving medium 12 are indicated by small holes in the figure. Seeds 2 aligned and moved on grooves 1 of the seeding device located above the medium
There is a low wall-shaped stopper 4 at the right end of the groove 1,
The seeds are stopped by the stopper 4 and stay in the state shown in FIG. In this state, the movement of the seed due to the weak vibration is stopped and only the weak vertical vibration is performed. Here, if the electromagnet 5 is energized for strong vibration, the suction plate 8 is strongly sucked and the groove 1 fixed to 8 is strongly lifted upward.
Since the groove is located at the lower right from the fulcrum 9 of the movement, the vibration of the groove has a vector of a small arrow pointing diagonally right upward, and the seed 3 jumps over the stopper 4 to the upper right and is sown selectively. The empty space from which the seed 3 has been removed is filled by the movement of the seed due to the next weak vibration. This operation is performed for each predetermined vibration count,
Sowing work is performed. In order to inoculate accurately at the seeding point in synchronization with the movement speed of the relative moving medium, see the timing at which the seed to be selectively sowed lands at the point,
The timing of the vibration must be adjusted. Depending on the cultivation situation, a plurality of seeds may be sown at the same point. In this case, when the number of seeds in the shoot reaches a predetermined number by the fixed chute 16, the guide cover 14, and the movable chute 15, the electromagnet 11 is energized. Then, the movable chute 15 opens the lower part to drop the seeds. Also in this case, the landing timing of the seed, the opening timing of the shoot,
It is necessary to precisely match the timing of the strong vibration. The groove can also be slightly tilted to the lower right to facilitate seed alignment. As described above, since the seeding operation is designed and executed with extremely high precision, it is necessary to manufacture each operation part with precision and light weight. The weight of the vibration-related parts used in the embodiment is about 8 grams. The groove cover 6 is provided so that the seeds 2 do not overlap with each other multiple times and to prevent the seeds 2 from jumping out due to strong vibration. The damper 10 is a vibration isolator made of rubber or the like provided to prevent excessive vibration of the groove, and is fixed to the frame 17. The seed sensor 7 is a sensitive sensor such as an optical sensor. Upon receiving this signal, an appropriate amount of seed is supplied into the hopper 18 by a seed supply device (not shown). It is very important to keep an appropriate amount of the seeds. If the amount is too large or too small, the alignment movement of the seeds in the groove is disturbed, and if the seeds at the retention position are insufficient, seeding defects will occur. FIG. 2 is a side view of the groove 1, the cover 6, the stopper 4, and the seed 3. If the cover 6 and the stopper 4 are changed according to the size of the seed, various seeds can be used in the same groove. be able to. A plurality of grooves are arranged in accordance with the number of pits to be seeded in front. FIG.
Are similarly arranged in accordance with the number of front arrays. And they work at the same time, sowing at the same time. FIG. 3 is a control block diagram. The conditions input by a switch, a keyboard and the like 19 of the seeding condition input section are stored in a storage device 20. The once-stored condition is called at any time by the seed type registration code, and the speed signal from the medium speed sensor 31 and the timing of sowing and vibration are calculated and processed by the computer 32.
2, 23 and 24. This digital output signal is converted into an analog signal by a digital / analog conversion and amplification circuit 25, and is further amplified to a required level to become an electromagnet excitation output 26 to operate the electromagnet. On the other hand, the seed amount is controlled by a seed amount sensor 27.
Is output from the seed replenishing device circuit 30 to the seed replenishing valve by the timing etc. setting circuit 28 and the excess / deficiency judging circuit 29 so as to keep the seed in an optimal amount. The seeds are supplied to the hopper 18 through a storage tank, a seed replenishing valve, and a pipe (not shown) as needed. The present invention is an automatic sowing apparatus capable of sowing seeds efficiently on a cultivated soil. It is possible to fundamentally remove troubles caused by suction needles in a conventional vacuum automatic sowing apparatus to improve work efficiency. The present invention can provide labor-saving labor, provide a high-precision, automatic automatic sowing apparatus for sowing various kinds of seeds accurately, and achieve great economic effects such as reducing waste of used seeds of agricultural crops and increasing yield.

[Brief description of the drawings] FIG. 1 is a schematic side view of a sowing apparatus. FIG. 2 is a vertical sectional front view of a main part of a sowing apparatus. FIG. 3 is a control block diagram. [Explanation of symbols] 1 groove 2 seeds 3 staying seeds 4 Stopper 5 Electromagnet 6 Cover 7 Seed sensor 8 Suction plate 9 fulcrum 10 Damper 11 Electromagnet 12 Medium 13 sowing points 14 Guide cover 15 Movable chute 16 Fixed chute 17 frames 18 Hopper 19 Operation data input section 20 Storage device 21 Weak vibration output circuit 22 Frequency counting circuit 23 Judgment counter 24 Strong vibration output circuit 25 Digital / analog conversion and amplification circuit 26 Electromagnet excitation output circuit 27 Seed quantity sensor 28 Timing setting circuit 29 Excess / insufficient judgment circuit 30 Seed supply device circuit 31 Medium speed sensor 32 Calculator

Claims (1)

Claims: 1. A groove for aligning and moving seeds in an automatic sowing apparatus for automatically sowing a relatively moving medium, and detecting the amount of seed in a part of the groove. Providing a sensor, providing seed replenishing means for always keeping an appropriate amount of seed in the groove based on the signal of the sensor, providing a stopper for selecting seeds to be sown at the tip of the alignment movement of the seeds, providing a moderate strength for the seeds to move. A control means for giving a weak vibration to the groove, a counting means for counting the frequency, and a strong vibration for which the selected seed is sown beyond the stopper when the frequency reaches the sowing count. An automatic sowing apparatus comprising a control unit.