JPH04148633A - Apparatus for removing weed - Google Patents

Abstract

PURPOSE:To obtain the subject apparatus, having high safety and capable of removing weeds without using any agricultural chemical by installing a high- voltage electrode in the interior of a stick for generating a high voltage, providing the tip of the stick with a recessed part and projecting the tip of the high- voltage electrode from the bottom of the recessed part within a range to a place without reaching the tip of the stick. CONSTITUTION:In an apparatus 1 for removing weeds by applying a pulsed high voltage or DC high voltage across a high-voltage electrode 8 and soil to remove the weeds from lawn, etc., by spark discharge, the high-voltage electrode 8 is installed in the interior of a stick 2 composed of an insulator for generating the high voltage and the base end thereof is connected through a cable 18 to a high-voltage generator 6. The tip of the stick 2 for generating the high voltage is simultaneously provided with a recessed part 14 of an insulating material 12 hollowed to a prescribed depth and the tip of the high-voltage electrode 8 is projected from the bottom of the recessed part 14 within the range without reaching the tip of the stick 2 for generating the high voltage. Thereby, the body of an operator will not touch the high-voltage electrode 8 on the tip thereof and the safety is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a weed removal device for removing weeds from lawns and the like.

(Prior Art) Conventionally, in order to remove weeds from lawns and the like, methods such as spraying pesticides (herbicides) on the lawns and the like have been adopted.

However, pesticides are not desirable because they cause environmental pollution.To remove weeds without using pesticides,
For example, it is possible to pull out weeds one by one, but this has the problem of being extremely time-consuming and labor-intensive.

In order to deal with this problem, in recent years, methods have been used to remove weeds using electrical discharge.

This uses a weed removal device having a high voltage electrode, and applies a pulsed high voltage or direct current high voltage between the high voltage electrode and the soil to remove weeds by spark discharge.

(Problem to be Solved by the Invention) However, in conventional weed removal devices, the part (tip) of the high-voltage electrode that generates discharge is exposed to the outside, which may come into contact with the worker's body and cause injury. In addition to being dangerous, for example, if there are water droplets adhering to the surface of the weed removal device, there is a risk of electric shock to the operator through the water droplets.

In addition, it is necessary to ground the ground wire to the soil each time it is moved, which is time-consuming, and the shape of the discharge part (tip) of the high-voltage electrode cannot be changed to suit the weeds, making work difficult. There is a problem with poor quality.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a weed removal device with improved safety and workability.

(Means for Solving the Problem) In order to achieve the above object, a first weed removal device according to the present invention applies a pulsed high voltage or a direct current high voltage between a high voltage electrode and the soil. In a weed removal device that removes weeds by spark discharge, the high-voltage electrode is installed inside a high-voltage generation stick made of an insulator, and the high-voltage electrode is attached to the tip of the high-voltage generation stick at a predetermined depth. A concave portion is formed, and the tip of the high voltage electrode protrudes from the bottom of the concave portion within a range that does not reach the tip of the high voltage generating stick.

Further, a second weed removal device according to the present invention includes the first weed removal device.
According to the present invention, spark generating adapters having various shapes are replaceably attached to the recess provided at the tip of the high voltage generating stick.

A third weed removal device according to the present invention is a weed removal device in which weeds are removed by spark discharge by applying a pulsed high voltage or a direct current high voltage between a high voltage electrode and soil. An electrode is mounted inside a high voltage generating stick made of an insulating material, and a current shielding member made of a conductive material is provided near the tip of the high voltage generating stick.

Furthermore, a fourth weed removal device according to the present invention is a weed removal device that removes weeds by spark discharge by applying a pulsed high voltage or a direct current high voltage between a high voltage electrode and soil. The ground wire of the weed removal device is connected to a grounding shoe having a plurality of protrusions made of a conductive material on the bottom.

(Function) Therefore, in the first invention, since the tip of the high-voltage electrode is located in the recess so as to face the tip of the high-voltage generating stick from the bottom of the recess, the high-voltage electrode does not work. In addition, in the second invention, the shape of the part of the high-voltage electrode that generates discharge can be changed as appropriate to match the weeds by replacing the spark generation adapter. Therefore, work efficiency is improved.

In the third invention, electric shock is avoided because current due to discharge of the high voltage electrode flows into the current protection member.

Furthermore, in the fourth aspect of the invention, as the worker moves, the worker is grounded to the soil via the protrusion of the grounding shoe, thereby saving the effort of grounding the ground wire.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

An example of a weed removal device is shown in FIG. 1, and the weed removal device 1 basically consists of a high voltage starting stick 2 and a high voltage generator 6 placed on a trolley 4. There is.

As shown in detail in FIG. 2, the high-voltage generating stick 2 is a long and thin pipe-shaped stick made of an insulating material such as vinyl chloride, and has a high-voltage electrode 8 as described below inside. A buried cable 10 is attached. Further, a substantially cylindrical insulating material 12 is provided at the tip of the high voltage generating stick 2, and a recess 14 having a predetermined depth is formed in the insulating material 12. In addition, 16
18 is a band for shoulder straps, and 2 is a stick for high voltage generation.
This cable connects the high voltage generator 6 and the high voltage generator 6.

The high voltage electrode 8 is shaped like a long and thin rod, and its base end is connected to a high voltage generator 6 described below via a cable 18, and its tip end is inserted through the core of the insulating material 12. , protrudes from the bottom surface of the recess 14 of the insulating material 12 within a range that does not reach the tip of the high voltage generating stick 2.

As shown in detail in FIG. 3, the high voltage generator 6 includes, for example, a power source (generator) 20, a transformer 22, and a high voltage pulse generating circuit 24. In addition, 2
5 is a switch for driving the weed removal device l, and 27 is a ground wire.

In this high voltage generator 6, when a switch 25 is turned on, a high voltage is increased from a power source 20 through a transformer 20, and is rectified into direct current by a diode 26 of a high voltage pulse generating circuit 24, and a resistor 28 is turned on. The capacitor 30 is charged via the capacitor 30. The capacitor 30 then discharges the charged high voltage as a pulsed high voltage through the high voltage electrode 8. Note that the electric field strength between the high voltage electrode 8 and the soil 34 due to this discharge is set to be, for example, 10 kV/cm or more. Also, the ground wire 2 of this high voltage generator 6
7 is grounded to the soil 34 via a needle-shaped grounding member 32 provided in front of the truck 4.

An example of the use of the weed removing device 1 having such a configuration will be explained with reference to FIG. 4.

First, the needle-shaped grounding member 32 of the cart 4 is buried (inserted) into the soil 34 so that the grounding wire 27 of the weed removal device 1 is grounded to the soil 34, and the tip of the high voltage generation stick 2 is connected to a 3C11, for example. The robot approaches the weeds 36 protruding from the lawn (not shown) at a certain distance so as to face them. and,
Turn on switch 25. As a result, a spark discharge occurs through the weeds 36 between the tip of the high voltage electrode 8 of the high voltage generation stick 2 and the soil 34, and the cells of the leaves, stems and roots of the weeds 36 are destroyed. It is removed from the lawn because of the In addition, since the discharge current is diffused into the soil 34 by such discharge, the vicinity of the roots of the weeds 36 becomes a high electric field intensity region, and the soil is sterilized at the same time.

As described above, in this weed removal device 1, the recess 1 is arranged such that the tip of the high voltage electrode 8 faces the tip of the high voltage generating stick 2 from the bottom of the recess 14 of the insulating material 12.
4, the tip of the high voltage electrode 8 is protected within the recess 14 and does not come into contact with the worker's body, thereby preventing injury.

Next, an embodiment of the weed removal device according to the second invention will be described.

The feature of the weed removal device according to the second invention is that, as shown in FIG. For example, spark generating adapters 42 and 44 having the shapes shown in FIGS. 5(a) and 5(b) are replaceably mounted. The rest of the structure is the same as that of the weed removal device according to the first invention described above, so the explanation thereof will be omitted below.

The spark generation adapter 42.44 consists of a threaded portion 46.48 provided with a threaded groove, and a spark generation terminal 50°52 whose base end is inserted into the threaded portion 46.48. The spark generating terminal 5o is formed into a wide knife shape,
The other spark generating terminal 52 is formed into a long needle shape that projects forward.

The spark generating adapter 42, 44 has a threaded portion 4.
6.48 is screwed into the recess 14 of the insulating material 12, and its base is connected to the tip of the high voltage electrode 8.

However, by appropriately replacing the spark generation adapters 42 and 44 of the lever according to the shape of the weeds to be removed, the discharge area of the high voltage electrode 8, etc. can be varied, improving the workability of weed removal. . Note that the shape of the spark generation terminal of the spark generation adapter is not limited to the above-mentioned shape, but may be arbitrarily set as appropriate.

Next, an embodiment of the weed removal device according to the third invention will be described.

The feature of the weed removal device according to the third invention is that, as shown in FIG. 2, a ring-shaped electricity shielding member 54 is provided near the tip of the high voltage generating stick 2. The rest of the structure is the same as that of the weed removal device according to the first invention described above, so the explanation thereof will be omitted below.

The electricity shielding member 54 is made of a conductive material, and is connected to the ground wire 27 of the weed removal device 1 via an electric wire 56 arranged in the high voltage generation stick 2, and is grounded to the soil. It looks like this.

The current protection member 54 is provided to prevent the high voltage discharged from the high voltage electrode 8 from causing an electric shock to the operator. That is, even if water droplets or the like adhere to the surface of the high voltage generation stick 2, the current due to the high voltage discharged from the high voltage electrode 8 flows into the current shielding member 54, and therefore does not reach the operator's hand. , electric shock is avoided.

Next, an embodiment of the weed removal device according to the fourth invention will be described.

The feature of the weed removal device according to the fourth invention is that, as shown in FIG.
A grounding shaft 58 described below without being connected to the needle-like grounding member 32
The reason is that it is connected to. The rest of the structure is the same as that of the weed removal device according to the first invention described above, so the explanation thereof will be omitted below.

The grounding shaft 58 is boot-shaped and has a conductive plate 6 at its bottom.
A protrusion 62 made of a plurality of conductors is provided through the conductor. The ground wire 27 of the high voltage generator 6 is connected to this conductive plate 60, and the ground wire 27 of the high voltage generator 6 and each protrusion 62 are electrically connected through the conductive plate 60. There is.

That is, when the worker wears this grounding shaft 58,
As the worker moves, each protrusion 62 of the grounding shaft 58 sticks into the soil 34, thereby grounding the ground wire 27 of the high voltage generator 6 to the soil 34. This eliminates the need for the worker to ground the ground wire 27 of the high voltage generator 6 to the soil 34 every time the worker moves, improving work efficiency for the worker.

(Effects of the Invention) As described above, according to the first invention, since the tip of the high voltage electrode is surrounded within the recess, the tip of the high voltage electrode does not touch the body of the worker. There is no danger and safety is improved.

Further, according to the second invention, since the replaceable spark generation adapter is attached to the tip of the high voltage starting stick, the discharge area etc. can be changed as appropriate, and weeds can be removed. This makes it possible to improve work efficiency.

According to the third aspect of the invention, since the electric shock member is provided near the tip of the high voltage generation stick, the current caused by the discharge of the high voltage electrode flows into the electric shock member, thereby avoiding electric shock to the worker. As with the first invention, safety is improved.

Furthermore, according to the fourth invention, since the ground wire of the weed removal device is connected to the protrusion provided on the grounding shaft worn by the worker, the ground wire is grounded to the soil as the worker moves. This eliminates the conventional effort of having to ground the ground wire every time the machine is moved, increasing work efficiency.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the weed removal device, Figure 2 is a detailed diagram of the high voltage generation stick, Figure 3 is a circuit diagram of the high voltage generation device, and Figure 4 is a diagram explaining an example of how the weed removal device is used. , FIG. 5 is a plan view of the spark generation adapter, and FIG. 6 is an explanatory diagram of the grounding shaft. l... Weed removal device, 2... High voltage starting stick, 4... Trolley, 6... High voltage generator, 840.
High voltage electrode, 14... recess, 27... earth wire, 3
4...Soil, 36...Weed, 42.44...Spark generation adapter, 54...Electricity shielding member, 58...Grounding shaft, 62...Protrusion. Figure 3 Figure 5 (b)

Claims (1)

[Claims] 1. A weed removal device that removes weeds by spark discharge by applying a pulsed high voltage or a direct current high voltage between a high voltage electrode and the soil, wherein the high voltage electrode is formed of an insulating material. At the same time, a recessed portion having a predetermined depth is formed at the tip of the high voltage generation stick, and the tip of the high voltage generation stick is inserted from the bottom of the recess. A weed removal device characterized in that the tip of the high voltage electrode protrudes within a range that does not reach . 2. The weed removal device according to claim 1, wherein spark generating adapters having various shapes are replaceably attached to the recess provided at the tip of the high voltage generating stick. 3. In a weed removal device that removes weeds by spark discharge by applying a pulsed high voltage or a direct current high voltage between a high voltage electrode and soil, the high voltage electrode is made of an insulating material for high voltage generation. 1. A weed removal device, characterized in that a current-preventing member made of a conductive material is attached to the inside of the stick and is provided near the tip of the high-voltage generating stick. 4. In a weed removal device that removes weeds by spark discharge by applying a pulsed high voltage or a direct current high voltage between a high voltage electrode and the soil, the ground wire of the weed removal device is connected to a conductor at the bottom. A weed removal device characterized in that it is connected to a grounding shoe provided with a plurality of protrusions consisting of: