KR20040009929A - Blade for weeder - Google Patents

Blade for weeder Download PDF

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Publication number
KR20040009929A
KR20040009929A KR1020020044305A KR20020044305A KR20040009929A KR 20040009929 A KR20040009929 A KR 20040009929A KR 1020020044305 A KR1020020044305 A KR 1020020044305A KR 20020044305 A KR20020044305 A KR 20020044305A KR 20040009929 A KR20040009929 A KR 20040009929A
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KR
South Korea
Prior art keywords
blade
brush cutter
cutter blade
polycarbonate
edge
Prior art date
Application number
KR1020020044305A
Other languages
Korean (ko)
Inventor
백인동
Original Assignee
백인동
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 백인동 filed Critical 백인동
Priority to KR1020020044305A priority Critical patent/KR20040009929A/en
Publication of KR20040009929A publication Critical patent/KR20040009929A/en

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/02Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having reciprocating cutters
    • A01D34/13Cutting apparatus
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01BSOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B39/00Other machines specially adapted for working soil on which crops are growing
    • A01B39/12Other machines specially adapted for working soil on which crops are growing for special purposes, e.g. for special culture
    • A01B39/18Other machines specially adapted for working soil on which crops are growing for special purposes, e.g. for special culture for weeding

Abstract

PURPOSE: A brush cutter blade is provided to enhance flexibility, elasticity, impact resistance and endurance of the brush cutter blade and thus, to improve productivity and life span of the brush cutter. CONSTITUTION: The brush cutter blade(2) is made of polycarbonate or specifically polycarbonate of bisphenol A, which has excellent physical properties including impact resistance, dimensional stability and good strength and stiffness over a wide service temperatures. To reinforce the brush cutter blade(2) during a molding process, a reinforcing material(4) is formed on the outer surface of the blade(2). Cutting edges(6,8) of the blade(2) are formed in both directions. An edge(6) is formed horizontally, and the other edge(8) is inclined, so a user selects an appropriate edge in dependence of work applications.

Description

예초기용 칼{Blade for weeder}Blade for Weeder {Blade for weeder}

본 발명은 폴리카보네이트로 제작되는 예초기용 칼에 관한 것이다.The present invention relates to a lawnmower knife made of polycarbonate.

예초기는 잡초제거는 물론 과수 가지치기나 간벌사업 등 다용도로 이용되는 것으로서, 그 칼은 일반 칼과 같이 금속제로 제작된다.The mower is used for various purposes such as weed removal, fruit pruning and thinning business. The knife is made of metal like a general knife.

그러나 금속재 칼은 고가의 특수 재질로서 재료비가 많이 소요되고, 또 철판을 원하는 형태로 프레싱가공하고 중앙에는 결합공을 천공하며 그라인딩으로 날을 세운 다음 열처리하여 완제품을 얻도록 하는 복잡한 공정으로 제작되므로 생산성이 저하되며, 열처리과정에서 크랙이 발생될 우려가 있어 불량률이 높고 또 이로 인하여 현미경을 통한 정밀검사 후 합격품에 한하여 출하되어야 하나 대부분의 업체는 영세하여 검사가 제대로 이루어지지 못하고 있는 실정이라 크랙에 의한 불량제품의 판매로 사용과정에서 약한 충격에도 쉽게 부러져 안전사고를 유발시키게 된다.However, metal knives are expensive and special materials, which require a lot of material costs, and are manufactured in a complex process that presses steel plates in the desired shape, drills the joining holes in the center, sets the blades by grinding, and then heat-treats to obtain finished products. It is lowered, and there is a risk of cracking during the heat treatment process, so the defect rate is high and because of this, it should be shipped only after the inspection through a microscope. However, most companies are small and are not properly inspected. The sale of defective products easily breaks down in the process of use and causes a safety accident.

또한 무거운 무게로 인하여 고속회전시 벨런스를 유지할 수가 없어 강한 진동이 발생하게 될 뿐 아니라 장시간 작업이 어려우며, 이러한 칼의 무게와 언벨런스로 인한 진동시 힘이 약한 엔진에 무리를 주어 과부하가 발생되므로 엔진의 고장 발생율이 매우 높고 또 사용 수명을 단축시키게 된다.In addition, due to the heavy weight, it is not possible to maintain the balance at high speeds, which causes not only strong vibration, but also difficult work for a long time, and overload occurs due to overload due to the weak force of the engine due to the weight and unbalance of the knife. The failure rate of the battery is very high and the service life is shortened.

또한 작업시 날이 무디어지게 되면 사용수명을 다하게 되므로 수명이 매우 짧고, 특히 작업 중 고속회전하는 칼이 돌이나 지면 등과 부딪히게 되면 금속제가 갖는 재질의 특성상 쉽게 부러질 뿐 아니라, 부러진 날카로운 파편은 그 속도에 무게가 더해 지게 되므로 파편으로 인하여 작업자에게 위해가 가해질 경우 치명적인 상처를 주게 되는 등의 많은 문제점들이 지적되고 있는 것이다.In addition, if the blade becomes dull during operation, the service life is very short, so the service life is very short.In particular, if the knife that rotates at high speed hits a stone or the ground, it is easily broken due to the nature of the material of the metal. As the weight is added to the speed, many problems are pointed out, such as causing a fatal injury to the worker due to debris.

이에 본 발명은 제작시 간단히 사출성형하여 제작이 완료되므로 생산성이 매우 높고 무게가 가볍고 또 심한 진동 우려가 없어 장시간 작업이 가능할 뿐 아니라 엔진의 과부하 우려가 없고, 날이 무디어지게 되면 간단히 날을 세워서 사용하면 되며, 특히 휨성 내지는 탄성으로 인하여 쉽게 부러질 우려가 없고 부러진다 하더라도 그 파편의 무게가 가벼워 작업자에게 큰 상처를 줄 우려가 없는 예초기용 칼의 재질에 대한 용도발명을 제공하고자 한다.Therefore, the present invention can be produced by simply injection molding at the time of manufacture, so the productivity is very high, the weight is light, and there is no fear of severe vibration, so it is possible to work for a long time, and there is no fear of overload of the engine. In particular, there is no fear of breaking easily due to flexibility or elasticity, and even if broken, the weight of the debris is light, so that the purpose of the invention for the material of the lawn mower knife does not have to be a serious injury.

도 1 : 본 발명 일실시 예의 사시도1: perspective view of one embodiment of the present invention

도 2 : 본 발명 도1의 A-A'선 단면도2 is a cross-sectional view taken along the line AA 'of the present invention.

도 3 : 본 발명 타실시 예의 사시도3 is a perspective view of another embodiment of the present invention

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

(2)--칼(4)--보강편(2)-Knife (4)-Reinforcement

(6)(8)--날(6) (8)-day

본 발명은 플라스틱으로서 비스페놀 A가 원료인 폴리카보네이트로 예초기용 칼(2)을 구성하고자 한다.The present invention intends to construct a knife 2 for mowing with polycarbonate from which bisphenol A is a raw material as plastic.

폴리카보네이트는 내충격성과 단열성, 채광성, 시공성, 곡면성형성, 내후성, 자기소화성 등이 우수한 물성을 지니고 있으며, 주로 건축분야의 천정이나 캐노피, 건축물의 연결통로, 건물채광판, 지붕재, 고층아파트의 창호 및 안전유리, 방탄 및 방음벽, 실내칸막이 등으로 이용되고 있다.Polycarbonate has excellent properties such as impact resistance, heat insulation, skylighting, construction, curvature formation, weather resistance, and self-extinguishing.It is mainly used in ceilings, canopies, building connecting passages, building skylights, roofing materials, and high-rise apartments. It is used for windows and safety glass, bulletproof and soundproof walls, and interior partitions.

이러한 폴리카보네이트를 포함한 합성수지는 이재껏 재질자체에 대한 불신으로 절단용 칼의 재료로서 이용된 사실이 없고 문헌을 통하여도 보고된 바 없다.Synthetic resins containing such polycarbonates have never been used as materials for cutting knives because of their distrust in the materials themselves and have not been reported in the literature.

이에 본 발명자는 폴리카보네이트가 갖는 특성 중 내충격성과 내구성 및 사출성형으로 간단히 제작할 수 있는 점 등에 주목하여 용도발명을 하고자 한 것으로서, 시제품을 제작하여 예초기용 칼(2)로서의 적합성 여부를 사각도로 검토하였다.Therefore, the inventors of the present invention intend to use the invention by paying attention to the characteristics of polycarbonate, such as impact resistance, durability, and injection molding, which can be easily produced. The prototype was manufactured and examined for its suitability as a lawnmower knife (2). .

즉 폴리카보네이트는 일반 합성수지와 같이 사출 성형으로 원하는 형태로 제작할 수가 있으며, 사출 성형 과정에서는 별도의 추가공정 없이도 보강을 요할 경우 외면에 보강편(4)을 형성해 줄 수가 있고, 날(6)(8)을 세워줄 수도 있어 생산성 향상을 기대할 수가 있다.That is, polycarbonate can be produced in a desired shape by injection molding like general synthetic resin, and in the injection molding process, a reinforcing piece 4 can be formed on the outer surface when reinforcing is required without additional processing, and blades 6 and 8 ), You can expect to improve productivity.

또한 사출성형시에는 기존 금속재 예초기용 칼에 비해 더욱 복잡하고 다양한 형상으로 제작할 수가 있어 형상을 특정할 필요는 없다.In addition, it is not necessary to specify the shape during injection molding because it can be manufactured in a more complicated and diverse shape than the conventional metal lawn mower.

날(6)(8)을 형성함에 있어서도 양방향에 날을 형성하되 일방향에 갖는 날(6)은 수평면 상에 형성하고, 타방향에 갖는 날(8)은 경사면 상에 형성하여 작업용도에 따라 양 날을 선택적으로 이용할 수 있도록 하는 것이 바람직하다 할 것이다.In forming the blades 6 and 8, the blades are formed in both directions, but the blades 6 in one direction are formed on the horizontal plane, and the blades 8 in the other direction are formed on the inclined plane. It would be desirable to make the blade available selectively.

폴리카보네이트는 일반 합성수지와 같이 금속에 비해 가볍고 또 내충격성은 일반 유리의 250배이고 아크릴의 30배로서, 날(6)(8)의 큰 손상 없이 직경이 약 1cm의 잔가지 까지도 쉽게 절단할 수가 있어 예초기용 칼로서 요구되는 충분한 강도를 지닐 수 있는 것을 확인하였다.Polycarbonate is lighter than metal and impact resistance is 250 times that of ordinary glass and 30 times of acrylic like general synthetic resin, and it can easily cut twigs of about 1cm in diameter without major damage to blades (6) (8). It was confirmed that it could have sufficient strength required as a knife.

또한 무게가 가벼워진 만큼 취급이 용이하고 또 고속 회전시에도 벨런스를 유지할 수가 있어 진동발생이 거의 없어 장시간 작업이 가능하며 엔진의 과부하 우려를 없애줄 수가 있다.In addition, as the weight is light, it is easy to handle and maintains the balance even at high speed, so there is almost no vibration, so it is possible to work for a long time and eliminate the concern of overload of the engine.

작업 중 날(6)(8)이 무디어지게 되면 미리 준비한 칼이나 낫 등으로 날을 날카롭게 깎아서 세워주면 되므로 사용수명을 연장시켜 줄 수가 있다.If the blades (6) and (8) become dull during the work, the blades can be sharpened and cut with a knife or sickle prepared in advance so that the service life can be extended.

또한 고속회전시 돌이나 지면등과 부딪히게 되더라도 합성수지의 재질자체가 갖는 고유의 휨성 내지는 탄성으로 잘 부러지지 않아 부주의에 의한 수명단축 우려를 그만큼 줄일 수 있게 된다.In addition, even when bumped with stones or ground during high-speed rotation, the inherent bending property or elasticity of the synthetic resin itself is not easily broken, thereby reducing the risk of inadvertent shortening of life.

또한 큰 충격으로 칼이 부러져 파편이 작업자를 위해할 경우에도 파편의 무게가 가볍기 때문에 무거운 금속재 파편에 비해 작업자에 미치는 위해정도를 현저히 줄여 줄 수가 있게 된다.In addition, even when the knife is broken due to a large impact and the fragments are for the worker, the weight of the fragment is lighter, which can significantly reduce the degree of harm to the worker compared to the heavy metal fragments.

이와 같이 본 발명은 금속제에 비해 가격이 저렴한 폴리카보네이트를 사출 성형하여 제조하므로서 생산성이 매우 높으면서 재료비는 적게 소요되며 무게가 가볍고 또 이로 인하여 고속회전시 벨런스가 유지되므로 장시간 작업이 가능함은 물론 엔진의 과부하를 방지해 줄 수가 있고, 사용 중 날이 무디어지게 되면 칼이나낫 등으로 날을 세워 주면 되므로 사용수명이 연장되고, 돌이나 지면 등과 부딪혀 충격이 가해지게 되더라도 합성수지 고유의 휨성 내지는 탄성으로 인하여 잘 부러지지 않을 뿐 아니라 부러질 경우에도 파편의 무게가 가벼워 자칫 작업자에게 가해질 수 있는 위해정도를 그만큼 줄여줄 수가 있는 등 유용한 발명인 것이다.As described above, the present invention is manufactured by injection molding polycarbonate, which is inexpensive compared to metal, so that the productivity is very high, the material cost is low, and the weight is light. If the blade becomes dull during use, the blade can be erected with a knife or sickle to extend the service life, and even if the impact is applied to the stone or the ground, it will not break easily due to the inherent bendability or elasticity of the resin. Not only that, even if broken, the weight of the debris is a useful invention, such as to reduce the degree of harm that can be inflicted on the worker.

Claims (1)

통상의 예초기용 칼에 있어서, 칼(2)을 폴리카보네이트로 구성하여서 된 예초기용 칼In a conventional knife for mowing, a knife for mowing the blade 2 made of polycarbonate
KR1020020044305A 2002-07-26 2002-07-26 Blade for weeder KR20040009929A (en)

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Application Number Priority Date Filing Date Title
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02268617A (en) * 1989-04-07 1990-11-02 Kiyoshi Fujii Rotary edge for bush cutter
US5033259A (en) * 1987-01-23 1991-07-23 Adcock Paul R Blade for rotary lawnmowers and the like
US5167109A (en) * 1991-12-24 1992-12-01 Meinerding Wesley C Rotary mower blade

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5033259A (en) * 1987-01-23 1991-07-23 Adcock Paul R Blade for rotary lawnmowers and the like
JPH02268617A (en) * 1989-04-07 1990-11-02 Kiyoshi Fujii Rotary edge for bush cutter
US5167109A (en) * 1991-12-24 1992-12-01 Meinerding Wesley C Rotary mower blade

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