JPH0556740A - Weeding and sterilizing device - Google Patents

Abstract

PURPOSE:To improve safety of operation by attaching a stay formed of an insulating member to the end of a stick, simultaneously connecting the stay to an earth member and attaching a cover formed of an insulating member covering wheels to the top of the stick. CONSTITUTION:A high voltage electrode 16 connected to a high-voltage generator is attached to the end of a stick 15 formed of an insulating member and simultaneously the stay 21 is connected to an earth member of the high-voltage generator and a wheel 27 formed of an electrically conductive member are attached to the stay and simultaneously plural projections 29 formed of an electrically conductive member are provided in the periphery of the wheel 27 and a cover formed of an insulating member and used for covering the stay 21 and the wheels 27 is attached to the end of stick 150. Thereby sparking which is not desired by operators is prevented and stability of the operation is moreover improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weed removing and sterilizing apparatus for removing weeds from fields and lawns and sterilizing the soil.

[0002]

2. Description of the Related Art Heretofore, it has been customary to spray a lawn or the like with a herbicide to remove weeds from the lawn or the like, and to disinfect the soil, generally to spray a fungicide. Is.

However, spraying pesticides such as herbicides and fungicides is not preferable because it causes environmental pollution and has a risk of adversely affecting the human body. On the other hand, in order to remove weeds without using pesticides, it is sufficient to extract the weeds one by one, but this has a drawback that it requires a great deal of time and labor.

Therefore, in recent years, as disclosed in Japanese Patent Laid-Open No. 3-83534, a pulsed high voltage, a direct current high voltage or an alternating high voltage is applied between the high voltage electrode and the soil to generate a spark discharge. A weed removal and sterilization device was developed that kills and removes weeds by the spark discharge and sterilizes the soil by setting the soil near the roots of the spark-discharged weeds to a high electric field strength region. ing.

[0005]

However, Japanese Patent Laid-Open No. 3-8
In a weed removing and sterilizing apparatus in which a high voltage electrode is attached to the tip of a handle formed of an insulating member as disclosed in FIG. 1 of Japanese Patent No. 3534, the tip of the handle approaches or contacts a human body such as an operator. If you do, there is a risk of electric shock.

Although it is conceivable to provide an antistatic member at the tip of the handle in order to prevent electric shock, the provision of the antistatic member increases the weight of the handle and accumulates fatigue during long-term work. It will be.

[0007]

According to a first aspect of the present invention, there is provided a high voltage generator and a high voltage electrode connected to the high voltage generator, and a pulse is provided between the high voltage electrode and the soil. A weed removal sterilizer that removes weeds by spark discharge by applying a high voltage, a direct current high voltage, or an alternating high voltage, and sterilizes the soil by setting the soil near the roots of the weeds to a high electric field strength range. The high voltage electrode is attached to the tip of a stick formed by a member, the stay formed of a conductive member is attached to the tip of the stick, and the stay is connected to the ground member of the high voltage generator, and formed by a conductive member. Is attached to the stay, and a plurality of protrusions formed of a conductive member are provided on the outer periphery of the stay to insulate the stay and the wheel. The cover formed by wood attached to the distal end of the stick.

According to a second aspect of the present invention, in the first aspect of the present invention, the wheel is provided so as to be movable along the longitudinal direction of the stick, and the wheel is moved by a predetermined amount toward the side of the operator who holds the stick. A power switch for the high voltage generator that is turned on when the power is turned on is provided.

[0009]

According to the first aspect of the present invention, during the weed removing and sterilizing work performed while holding the stick and facing the weeds with the high-voltage electrode attached to the tip of the stick,
You can move the stick while rolling it while grounding the wheel attached to the tip of the stick,
The work effort is greatly reduced. In addition, since the stay and the wheel formed of a conductive member are arranged around the high-voltage electrode, and the stay is connected to the ground member of the high-voltage generator, the tip of the stick, the wheel, etc. come into contact with the human body. In that case, the electric current will flow to the ground member via the wheels and stays, preventing electric shock, and
Since the stay and the wheels are covered with the cover formed of the insulating member, the risk of the human body coming into contact with the wheels is greatly reduced. Also, even if the current during spark discharge flows to the stick due to water droplets adhering to the tip of the stick, the current will flow to the ground via the stay, wheels, or the grounding member connected to the stay. Therefore, the electric shock of the operator who holds the stick is prevented.

According to the second aspect of the present invention, when the high-voltage electrode attached to the tip of the stick is brought close to the weed that is going to perform spark discharge, and then a force is applied in a direction of bringing the tip of the stick close to the ground, When the wheels move to the side of the operator holding the stick and the high-voltage electrode approaches the ground, the power switch turns on and the spark discharge becomes possible when the wheels move by a certain amount. It is possible to prevent spark discharge from being carried out against the operator's will, unless a force is applied in the direction of bringing the tip of the stick closer to the ground in the state of being grounded.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the invention described in claim 1 will be described with reference to FIGS. A trolley 1 that is driven by being pushed by an operator is provided, and a high voltage generator 2 is mounted on the trolley 1. The high voltage generator 2 is mounted on the trolley 1.
As shown in FIG. 3, is composed of an AC generator 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 and a resistor 7 for the diode 6.
Capacitor 8 and capacitor 8 connected in parallel via
On the other hand, the capacitor 11 is connected in parallel via the charging terminal 9 and the rotating terminal 10, and the discharging terminal 12 is connected in parallel to the capacitor 11. Further, the trolley 1 is provided with a needle-shaped grounding member 13 which is a grounding member 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. ing.

Next, an elongated pipe-shaped stick 15 formed of an insulating material such as vinyl chloride is provided, and a cable 17 having a high voltage electrode 16 embedded therein is mounted inside the stick 15. At the base of the high-voltage electrode 16, an electric wire 19 arranged in a cable 18 connecting the dolly 1 and the stick 15 is provided.
Of the electric wire 19 is connected to the high voltage generator 2. In addition, the stick 13
A substantially cylindrical insulator 20 is fixed to the tip of the
The tip of the high voltage electrode 16 is inserted through the center of the insulator 20.

A stay 21 formed of a conductive member is fixed to the outer periphery of the stick 15 on the front end side. The stay 21 is opposed to the front end of the stay 21 at a position separated by 180 ° and is arranged in the longitudinal direction of the stick 15. A pair of long holes 22 is formed along the length. Further, a cover 23 which covers the stay 21 and a wheel described later and is formed of an insulating member is slidably attached along the longitudinal direction of the stick 15 on the outer periphery of the stick 15 on the tip end side. A spring 24 for urging the cover 23 toward the tip of the stick 15 is provided, and one end of the spring 24 abuts on a receiving portion 25 formed on the cover 23 and the spring 2
The other end of 4 is in contact with a stopper 26 of an insulating member fixed to the outer peripheral portion of the stick 15.

Next, a pair of wheels 27 formed of a conductive member are provided, and the axle 2 of these wheels 27 is provided.
One end of 8 is held at the tip of the cover 23,
The other end of 8 is slidably inserted into the slot 22. A plurality of protrusions 29 formed of a conductive member are provided on the outer peripheral portion of the wheel 26.

Further, an electric wire 30 which is inserted through the stick 15 and the cable 16 is provided, one end of the electric wire 30 is connected to the stay 21, and the other end of the electric wire 30 is connected to the needle-shaped ground member 13. It is connected. Further, the stick 1 is attached to the outer periphery of the stick 15.
A grip portion 31 for gripping 5 is provided, and this grip portion 31 is provided with two power switches 32 and 33 of the high voltage generator 2. Note that one power switch 32 is a main switch that is turned on from the start of work to the end of work, and the other power switch 33 is the grip switch 3
It is a safety switch that is turned on by being gripped by the operator's hand together with 1, and turned off by releasing the hand from the grip 31.

In such a structure, first, a mechanism of spark discharge from the high voltage electrode 16 will be described. When the power switches 32 and 33 are turned on, the AC voltage from the AC generator 6 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 the DC voltage. The capacitor 8 connected via is charged. When the voltage charged in the capacitor 8 reaches a predetermined voltage, the charging terminal 9 and the rotating terminal 1
The gap with 0 is short-circuited and the capacitor 11 is charged,
When the voltage charged in the capacitor 11 reaches a predetermined voltage, the rotary terminal 10 rotates to a position facing the discharge terminal 12. Then, this state is a state in which spark discharge can be performed from the high-voltage electrode 16, the tip end of the stick 15 is brought close to the ground, and the distance between the tip end of the high-voltage electrode 16 and the weed 34 is reduced. When the size becomes equal to or smaller than a predetermined value, the high voltage charged in the capacitor 11 is applied as a pulsed high voltage between the high voltage electrode 16 and the soil, and the weeds 34 are formed between the tip of the high voltage electrode 16 and the soil. A spark discharge is generated through. The electric field strength between the high voltage electrode 16 and the weed 34 due to this spark discharge is, for example, 10K.
It is set to be V / cm or more, and the spark discharge causes the weeds 34 to die by destroying the cells of leaves, stems, and roots, and removes them from the lawn. Further, since the discharge current is diffused into the soil due to this spark discharge, the vicinity of the root of the weed 34 becomes a high electric field strength region and the soil is sterilized at the same time.

Next, a specific procedure of the weed removing and sterilizing work by spark discharge will be described. After the carriage 1 is moved to the work area, the needle-shaped grounding member 13 is pierced into the ground to ground the high voltage generator 2. Then, the operator grips the grip 31 of the stick 15 and rolls the grounded wheel 27 so that the tip of the high-voltage electrode 16 faces the weed 34. In addition, when the height of the weeds 34 is small, when a force is applied in a direction of pressing the tip end of the stick 15 to the ground, the cover 23 is pushed up together with the wheels 27 against the biasing force of the spring 24 and is relatively high. The tip of the voltage electrode 16 approaches the weed 34,
The distance between the high voltage electrode 16 and the weed 34 is the distance at which spark discharge is possible. In this way, when the high-voltage electrode 16 is made to face the weed 34 with a predetermined size, and then the power switches 32 and 33 are turned on, the spark discharge is performed by the mechanism described above, and the weed 34 is removed and the soil is sterilized. Be done. Then, after the work for removing and sterilizing the weeds within a range in which the carriage 1 can be stopped is completed, the carriage 1 is
And the weed removal and sterilization work is repeated in the same manner.

Here, when the high voltage electrode 16 is moved to a position facing the weeds 34, the stick 15 is moved while rolling the wheel 27 which is grounded, so that the stick 15 can be used even if it is a heavy object. Labor is reduced. In addition, the stay 21 and the wheels 27 are attached to the tip of the stick 15.
Since the cover 23 of the insulating member that covers the
When the tip end side of the stick 15 is lifted during work, the risk that the wheels 27 or the like come into contact with the human body and receive an electric shock is reduced. Even if the tip of the wheel 27 or the stick 15 contacts the human body and a current flows, the current flows from the needle-shaped earth member 13 to the ground through the wheel 27, the stay 21, and the electric wire 30. Therefore, electric shock is prevented. Further, even when a current during spark discharge flows to the stick 15 due to water droplets attached to the tip of the stick 15, the current is connected to the stay 21, the wheel 27, or the stay 21. Since it flows to the ground through the grounding member 13, the electric shock of the operator holding the stick 15 is prevented.

Next, a second embodiment of the invention according to claim 1 will be described with reference to FIG. The same parts as those described in FIGS. 1 to 3 are designated by the same reference numerals, and the description thereof will be omitted (the same applies hereinafter). In this embodiment, a high voltage pulse generating circuit 36 including only one capacitor 35 is used in place of the high voltage pulse generating circuit 5. By turning on the power switches 32 and 33, the AC voltage from the AC generator 6 is increased in voltage in the transformer 4, and the increased high voltage is applied to the capacitor 35 and charged in the capacitor 35. Then, when the voltage charged in the capacitor 35 reaches a predetermined voltage, the high voltage electrode 16 becomes capable of spark discharge. Therefore, the high voltage electrode 16 is opposed to the weeds 34, the distance between them is set to a predetermined value or less, and the power switches 32 and 33 are turned on to charge the capacitor 35 and pulse the charged high voltage. High voltage is applied between the high voltage electrode 16 and the soil, and spark discharge is generated between the tip of the high voltage electrode 16 and the soil through the weeds 34.

Next, an embodiment of the invention described in claim 2 will be described with reference to FIG. In this embodiment, a power switch 37 that is turned on when the cover 23, together with the wheels 27, moves upward by a predetermined amount against the urging force of the spring 24 toward the operator's hand is provided near the cover 23. .. Therefore, the power switches 32 and 33 are turned on, and the high voltage electrode 16 is opposed to the weed 34, and then downward force is applied to the stick 15 to raise the cover 23 and the wheels 27 by a predetermined amount to turn on the power switch 37. If you do not do so, spark discharge will not occur. Therefore, it is possible to prevent the spark discharge from being performed against the operator's intention when the downward force is not applied to the stick 15, and the work safety is improved.

[0021]

As described in claim 1, since the wheel is attached to the tip of the stick, the stick can be moved while rolling the wheel so that the high voltage electrode faces the weeds. Therefore, since the movement of the stick can be performed with a small force, it is possible to significantly reduce the labor of the weed removal and sterilization work by the spark discharge.
When the stay formed by a conductive member and the wheel are arranged around the high-voltage electrode and the stay is connected to the ground member of the high-voltage generator, the tip of the stick, the wheel, or the like comes into contact with the human body. Since electric current flows to the ground member through the wheels and stays, it is possible to prevent electric shock. Moreover, since the stays and wheels are covered with an insulating member cover, there is a risk that the wheels, etc. may come into contact with the human body. It is possible to significantly reduce the electric shock and further prevent electric shock.Also, even if the current during spark discharge flows to the stick due to water droplets adhering to the tip of the stick, the current is not Wheels with protrusions, or
It is possible to prevent an electric shock of an operator who holds the stick because it flows to the ground through the grounding member connected to the stay, and, as in the invention according to claim 2, the wheels are moved in the longitudinal direction of the stick. A high-voltage generator is equipped with a power switch that is turned on when a wheel moves a predetermined amount to the side of a worker who holds a stick, so that the high-voltage electrode can be spark-discharged. The power switch will not turn on unless the wheels are moved by applying a force that pushes the stick against the ground, and it is possible to prevent spark discharge against the operator's will. At the same time, the work safety can be further improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a first embodiment of the invention according to claim 1.

FIG. 2 is a side view showing the entire weed removing and sterilizing apparatus.

FIG. 3 is a circuit diagram showing a high voltage generator.

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

FIG. 5 is a circuit diagram showing a high voltage generator according to an embodiment of the present invention.

[Explanation of symbols]

 2 High voltage generator 13 Ground member 15 Stick 16 High voltage electrode 21 Stay 23 Cover 27 Wheel 29 Protrusion 37 Power switch

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaaki Nakazawa, 1-1 1-1 Ishishiba, Matsumoto-shi, Nagano Ishikawajima Shibaura Machinery Co., Ltd. Matsumoto factory (72) Inventor Hitoshi Ejima 1-1-1 Ishishiba, Matsumoto-shi, Nagano Prefecture No. Ishikawajima Shibaura Machinery Co., Ltd.Matsumoto factory

Claims (2)

[Claims] 1. A high-voltage generator and a high-voltage electrode connected to the high-voltage generator, wherein a pulsed high voltage, a high DC voltage, or a high AC voltage is applied between the high-voltage electrode and the soil. In a weed removal sterilizer that sterilizes the soil by applying an electric field to the soil near the root of the weed while removing the weed by spark discharge, the high voltage is applied to the tip of the stick formed by the insulating member. An electrode is attached, a stay formed of a conductive member is attached to the tip of the stick, the stay is connected to a ground member of the high voltage generator, a wheel formed of a conductive member is attached to the stay, and the outer periphery of the wheel is attached. A plurality of protrusions formed of a conductive member on the portion, and a cover formed of an insulating member that covers the stay and the wheel is attached to the stick. Weed removing and sterilizing device characterized by being attached to the tip of the. 2. A power switch of a high voltage generator which is provided so as to be movable along a longitudinal direction of a stick, and which is turned on when the wheel is moved by a predetermined amount to a side of an operator who holds the stick. The weed removing and sterilizing apparatus according to claim 1, wherein the weed removing and sterilizing apparatus is provided.