JPH05168391A - Weeding apparatus - Google Patents

Abstract

PURPOSE:To improve the work efficiency of weeding by spark discharge. CONSTITUTION:This apparatus is composed of discharging wires 24 stretched between crops at a definite height from the ground or water surface of the field and a portable high-voltage generation apparatus 21 having a high-voltage generation part 2 and a high-voltage electrode 19 connected to the high-voltage generation part 2. The electrode 19 can be contacted with or separated from the discharging wires 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weed removing device for removing weeds between ridges and plants of crops by spark discharge.

[0002]

2. Description of the Related Art Conventionally, weeding work for removing weeds from the furrows or between plants of crops in a field has been done by spraying pesticides (herbicides) and weeding work by manually extracting each weed. And mechanical weeding work is performed.

However, weeding by spraying pesticides poses a risk of environmental pollution and adversely affects the human body. Further, weeding by hand requires a great deal of time and labor, and weeding by machines grows. There is a risk of damaging the crops inside.

Therefore, in recent years, as disclosed in Japanese Patent Laid-Open No. 3-83534, a pulsed high voltage or a direct current high voltage is applied between a high voltage electrode and soil to cause spark discharge, and this spark is discharged. A weed removing device has been developed that kills and removes weeds by electric discharge.

[0005]

However, in the conventional weed removing device by spark discharge, when weeds are removed in a field where a crop is growing, the weeds are removed spot by spot, so that it is very difficult. It takes a lot of work and the work efficiency is low. Furthermore, workers who remove weeds walk along the ridges in the field, which may damage the crops.

[0006]

DISCLOSURE OF THE INVENTION According to the present invention, a discharge wire which is separated from a ground or a water surface in a field by a predetermined size and is arranged between crops, a high voltage generator and a high voltage generator connected to the discharge wire. And a portable high voltage generator having a high voltage electrode which is brought into contact with and separated from the discharge wire.

[0007]

When the high-voltage electrode is brought into contact with the discharge wire to generate a high voltage from the high-voltage generator, the high voltage is applied between the discharge wire and the ground or water surface, and the discharge wire discharges this discharge. Spark discharge is generated through the weeds close to the work wire, and the weeds are removed by the spark discharge. It should be noted that the worker who removes the weeds can move the high-voltage generator to the edge of the field without stepping into the field and contact the high-voltage electrode with the discharge wire, which improves the efficiency of the weed-removal work. It also prevents the crops from being damaged during the weed removal work.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. First, a trolley 1 that is run by being pushed by an operator is provided, and this trolley 1 is equipped with a high-voltage generating section 2. The high-voltage generating section 2 is, as shown in FIG. It is composed of a machine 3, a transformer 4 and a high voltage pulse generation circuit 5. The high voltage pulse generation circuit 5 includes a diode 6 connected to the transformer 4, a capacitor 8 connected in parallel to the diode 6 via a resistor 7, a charging terminal 9 and a rotation terminal for the capacitor 8. And a discharge terminal 12 connected in parallel to the capacitor 11. Further, the trolley 1 is provided with a needle-shaped grounding member 13 which can be inserted into and removed from the ground, and the grounding wire 14 of the high voltage generator 2 is connected to the needle-shaped grounding member 13. Power switches 15, 16 and 17 are provided between the AC generator 3 and the transformer 4, one power switch 15 is attached to the carriage 1, and two power switches 16 and 17 are It is attached to a grip of a high-voltage generating stick described later.

Next, an elongated pipe-shaped high-voltage generating stick 18 made of an insulating material such as vinyl chloride is used.
A high voltage electrode 19 is attached to the tip of the high voltage generating stick 18, and the high voltage electrode 19 and the high voltage generating section 2 are connected by a high voltage cable 20. Then, these high voltage generators 2
A portable high-voltage generator 21 including the high-voltage generating stick 18, the high-voltage electrode 19, and the high-voltage cable 20.
Is configured. The power switches 16 and 17 are attached to the grip portion 22 of the high-voltage generating stick 18.

Next, in the field where the crop 23 is cultivated, the discharge wires 24 are arranged in a grid pattern between the furrows and the stocks of the crop 23. The discharge wires 24 are erected in the field. It is supported at a position separated from the ground by a predetermined dimension by a large number of insulating pillars 25. In addition, the upright of the pillar 25 and the disposition of the discharge wire 24 are arranged in the crop 23.
Before the growth of the cultivar, it is performed according to the intervals between the ridges and the stock of the crop 23. Further, one discharge wire 24 is usually arranged between the crops 23, but a plurality of discharge wires 24 may be arranged when the crop 23 is widely planted. ..

In such a structure, first, a mechanism of spark discharge from the discharge wire 24 in a state where the high voltage electrode 19 is in contact with the discharge wire 24 will be described. When the power switches 15 to 17 are turned on, the AC voltage from the AC generator 3 is increased in voltage in the transformer 4, and the increased high voltage is rectified by the diode 6 of the high voltage pulse generation circuit 5 into DC, and the resistance 7 The capacitor 8 connected via is charged. When the voltage charged in the capacitor 8 reaches a predetermined voltage, the gap between the charging terminal 9 and the rotating terminal 10 is short-circuited to charge the capacitor 11, and when the voltage charged in the capacitor 11 reaches the predetermined voltage, the rotating terminal 10 Rotates to a position facing the discharge terminal 12. Then, this state is a state in which the spark wire can be discharged from the discharge wire 24 in contact with the high-voltage electrode 19, and the discharge wire 24 passes through the weeds 26 adjacent to the discharge wire 24. Spark discharge occurs. The electric field strength between the discharge wire 24 and the soil due to the spark discharge is set to, for example, 10 kV / cm or more, and the weed 2
In No. 6, the cells of leaves, stems and roots are destroyed and withered and removed. In addition, since the discharge current is diffused into the soil due to this spark discharge, the vicinity of the root of the weed 26 becomes a high electric field strength region and the soil is sterilized at the same time.

Next, a specific procedure of weed removal work by spark discharge will be described. Truck 1 for discharging wire 2
4 is moved to the edge of the field in which the high voltage generator 21 is grounded by pushing the needle-shaped grounding member 13 against the ground, and the main power switch mounted on the truck 1 is grounded. Turn on 15. Then, the operator grips the grip portion 22 and brings the high-voltage electrode 19 into contact with the discharge wire 24 to turn on the power switches 16 and 17. Then, the spark discharge is performed by the mechanism described above, and the weeds 26 between the furrows and the plants close to the discharge wire 24 are removed. Then, the weeds 26 adjacent to the discharge wire 24 arranged in a wide range are removed all at once, so that the working efficiency is greatly improved. Moreover, the weeds 26 can be removed without the operator having to step into the field.

Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those described with reference to FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted. In the present embodiment, a high voltage pulse generating circuit 28 including only one capacitor 27 is used instead of the high voltage pulse generating circuit 5. By turning on the power switches 15 to 17, the AC voltage from the AC generator 3 is increased in voltage in the transformer 4, and the increased high voltage is applied to the capacitor 2
7 and the capacitor 27 is charged.
Then, when the voltage charged in the capacitor 27 reaches a predetermined voltage, spark discharge is performed from the discharge wire 24 with which the high voltage electrode 19 is in contact.

[0014]

According to the present invention, the discharge wire, which is separated from the ground or the water surface in the field by a predetermined size as described above, is arranged between the crops, and is connected to the high voltage generating section and the high voltage generating section. Since a portable high voltage generator having a high voltage electrode that is brought into contact with and separated from the discharge wire is provided, when the high voltage electrode is brought into contact with the discharge wire and a high voltage is generated from the high voltage generator, Spark discharge is performed from the discharge wire through the weeds near the discharge wire, the weeds between the crops can be removed, and the discharge wire should be arranged in a wide range. By doing so, weeds can be removed at once in a wide range of fields, which can improve work efficiency.In addition, because workers can remove weeds without stepping into the field, crops are damaged during weeding. It has an effect and the like can be stopped.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a high voltage generator.

FIG. 3 is a front view showing an arrangement state of discharge wires in a field.

FIG. 4 is a circuit diagram showing a high voltage generator according to a second embodiment of the present invention.

[Explanation of symbols]

 2 High voltage generator 19 High voltage electrode 21 High voltage generator 23 Crop 24 Discharge wire

Front page continued (72) Inventor Hitoshi Ejima 1-1-1 Ishishiba, Matsumoto-shi, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto factory (72) Inventor Masaaki Nakazawa 1-1-1 Ishishiba, Matsumoto-shi, Nagano Ishibashima Shibaura Machinery Co., Ltd. Matsumoto factory

Claims (1)

[Claims] 1. A discharge wire which is separated from a ground or water surface in a field by a predetermined size and is arranged between crops, a high-voltage generator and a discharge wire connected to the high-voltage generator. A weed removing device, comprising a portable high voltage generating device having a high voltage electrode which is brought into contact with and separated from the weed removing device.