JP5283023B2 - Mounting structure of flare mower blade - Google Patents

Mounting structure of flare mower blade Download PDF

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JP5283023B2
JP5283023B2 JP2011114235A JP2011114235A JP5283023B2 JP 5283023 B2 JP5283023 B2 JP 5283023B2 JP 2011114235 A JP2011114235 A JP 2011114235A JP 2011114235 A JP2011114235 A JP 2011114235A JP 5283023 B2 JP5283023 B2 JP 5283023B2
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cutting blade
holder
drive shaft
cutting
thin
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JP2012239439A (en
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潔 荻原
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オギハラ工業株式会社
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Abstract

<P>PROBLEM TO BE SOLVED: To easily detach and mount a plurality of cutting blades to attain quick cutting blade replacement work by detaching/mounting the cutting blade from/to a holder to perform cutting blade replacement work without carrying out detachment/mounting between the holder and a mounting part on the driving shaft side when replacing the cutting blade with a new cutting blade due to the damage and wear of the cutting blade. <P>SOLUTION: A cutting blade part 3 includes the holder 4 rotatably fitted in a swingable manner to the mounting part 2, and the cutting blades 5 for cutting trees and plants, and the holder and the cutting blades are provided to be freely inserted and detached in the direction of a rotation axis O of the driving shaft 1 by an inserting/detaching mechanism 6. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

本発明は、例えば、雑草の刈取りや牧草の刈取収穫、麦桿、取り残し野菜等の切断作業に用いられるフレールモア用刈刃の取付構造に関するものである。   The present invention relates to a mounting structure for a flare mower blade used for cutting weeds, pasture harvesting, wheat straw, leftover vegetables and the like.

従来、この種のフレールモア用刈刃の取付構造として、駆動軸の外周に複数個の取付部を所定位置に放射状に配設し、取付部に二個の刈刃を駆動軸の回転軸線と同方向の軸線をもつ取付ボルト及び取付ナットにより揺動自在に軸着した構造のものが知られている。   Conventionally, as a mounting structure for this type of flare mower, a plurality of mounting portions are radially arranged at predetermined positions on the outer periphery of the drive shaft, and two cutting blades are mounted on the mounting portion in the same manner as the rotation axis of the drive shaft. 2. Description of the Related Art A structure having a structure that is pivotably mounted by a mounting bolt and a mounting nut having a direction axis is known.

しかして、上記駆動軸を強制回転して刈刃を取付ボルトの軸線を中心として遠心力により起立揺動させ、この起立姿勢状態の複数個の刈刃により草木類を切断することになる。   Thus, the drive shaft is forcibly rotated to cause the cutting blade to stand up and swing by centrifugal force about the axis of the mounting bolt, and the plants are cut by the plurality of cutting blades in the standing posture state.

実開昭５８−７３４２６号公報Japanese Utility Model Publication No. 58-73426 実用新案登録第２５２１４３３号Utility model registration No.2522143

しかしながら上記従来構造の場合、駆動軸の外周に設けた取付部に対する刈刃の取付作業や損傷に伴う刈刃の交換作業において、上記取付ボルト及び取付ナットのスパナ等の手動工具による弛緩圧締を伴う着脱手作業が必要となり、着脱すべき刈刃は複数個存在することも相俟って大変労苦な作業となり、刈取作業性が低下することがあるという不都合を有している。   However, in the case of the above-described conventional structure, in the mounting operation of the cutting blade to the mounting portion provided on the outer periphery of the drive shaft and the replacement operation of the cutting blade due to damage, the mounting bolt and the mounting nut are tightened with a manual tool such as a spanner. The accompanying attaching / detaching manual operation is required, and the fact that there are a plurality of cutting blades to be attached / detached is a very laborious operation, and there is a disadvantage that the cutting workability may be lowered.

本発明はこれらの不都合を解決することを目的とするもので、本発明のうちで、請求項１記載の発明は、駆動軸の外周に複数個の取付部が所定位置に放射状に配設され、該各取付部に刈刃部が揺動自在に軸着され、該駆動軸を回動して複数個の刈刃部により草木類を切断するフレールモアにおいて、上記刈刃部は上記取付部に揺動自在に軸着されるホルダ及び草木類を切断する刈刃からなり、該ホルダと該刈刃とは挿脱機構により上記駆動軸の回転軸線方向に挿脱自在に設けられていることを特徴とするフレールモア用刈刃の取付構造にある。   The present invention aims to solve these disadvantages. Among the present inventions, the invention according to claim 1 is that a plurality of mounting portions are radially arranged at predetermined positions on the outer periphery of the drive shaft. In the flare mower in which the cutting blades are pivotally attached to the respective attachments, and the drive shaft is rotated to cut the vegetation with a plurality of cutting blades, the cutting blades are attached to the attachments. It is composed of a holder that is pivotably attached to the shaft and a cutting blade that cuts the vegetation, and the holder and the cutting blade are provided so as to be detachable in the rotational axis direction of the drive shaft by an insertion / removal mechanism. It is in the mounting structure of the cutting blade for flail mower which is the feature.

又、請求項２記載の発明は、上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び該駆動軸の半径方向に延びる対向一対の側杆部を形成し、該ホルダ及び該刈刃の各端杆部は該駆動軸の半径方向に鎖状に交差連繋可能に形成され、該刈刃の一方の側杆部に薄肉部を形成し、該ホルダの一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態において該刈刃の薄肉部の通過を許容する開口溝部を形成してなることを特徴とするものであり、又、請求項３記載の発明は、上記刈刃の一方の側杆部に形成される薄肉部は該側杆部一方面を山型凹面に形成してなり、上記ホルダの一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成してなることを特徴とするものである。   According to a second aspect of the present invention, as the insertion / removal mechanism, a connecting hole portion is formed in each of the holder and the cutting blade to extend in the rotational axis direction of the drive shaft, and the radial direction of the drive shaft A pair of opposing scissors extending to the holder, and the end scissors of the holder and the cutting blade are formed so as to be able to cross-link in the radial direction of the drive shaft, and one scissors of the cutting blade Forming a thin-walled portion on one side of the holder and forming an opening groove that allows passage of the thin-walled portion of the cutting blade in a crossed state of the holder and each side-hooked portion of the cutting blade. The invention according to claim 3 is characterized in that the thin wall portion formed on one scissor portion of the cutting blade is formed such that one side surface of the scissors portion is a chevron-shaped concave surface, A chevron-shaped convex surface is formed on each of the opposing inner surfaces of the opening groove formed on one side flange of the holder. It is intended to.

又、請求項４記載の発明は、上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び該駆動軸の半径方向に延びる対向一対の側杆部を形成し、該ホルダ及び該刈刃の各端杆部は該駆動軸の半径方向に鎖状に交差連繋可能に形成され、該ホルダの一方の側杆部に薄肉部を形成し、該刈刃の一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態において該ホルダの薄肉部の通過を許容する開口溝部を形成してなることを特徴とするものであり、又、請求項５記載の発明は、上記ホルダの一方の側杆部に形成される薄肉部は該側杆部一方面を山型凹面に形成してなり、上記刈刃の一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成してなることを特徴とするものである。   According to a fourth aspect of the present invention, as the insertion / removal mechanism, a connecting hole portion is formed in each of the holder and the cutting blade to extend in the rotational axis direction of the drive shaft, and the radial direction of the drive shaft A pair of opposing side flanges extending to the holder, and the end flanges of the holder and the cutting blade are formed so as to be capable of cross-linking in the radial direction of the drive shaft. Forming a thin-walled portion, and forming an opening groove that allows passage of the thin-walled portion of the holder in an intersecting state of the holder and each side-flank of the cutting blade on one side flange of the cutting blade. The invention according to claim 5 is characterized in that the thin wall portion formed on one side flange portion of the holder is formed such that one side surface of the side flange portion is a chevron-shaped concave surface. A convex convex surface is formed on each of the opposing inner surfaces of the opening groove formed on one side flange of the blade. It is an.

本発明は上述の如く、請求項１記載の発明にあっては、フレールモアの駆動軸の外周に複数個の取付部が所定位置に放射状に配設され、各取付部に刈刃部が揺動自在に軸着され、駆動軸を回動して複数個の刈刃部により草木類を切断することになり、この際、上記刈刃部は上記取付部に軸着されるホルダ及び草木類を切断する刈刃からなり、ホルダと刈刃とは挿脱機構により挿脱自在に設けられているから、例えば、刈刃の破損や損耗が生じ、新たな刈刃に交換する場合において、上記駆動軸側の取付部とホルダとの取外しや取付けをせずに、ホルダに対して刈刃を取外し、取付けることにより刈刃の交換作業を行うことができ、複数個の刈刃を容易に取外したり、取付けることができ、刈刃の交換作業を迅速に行うことができ、刈取作業性を高めることができ、かつ、ホルダと刈刃とは挿脱機構により上記駆動軸の回転軸線方向に挿脱自在であるから、高速回転して駆動軸の半径方向の遠心力を受ける刈刃の離脱を防ぐことができ、使用の安全性を高めることができる。   As described above, according to the first aspect of the present invention, a plurality of attachment portions are radially arranged at predetermined positions on the outer periphery of the drive shaft of the flare mower, and the cutting blade portion swings at each attachment portion. The shaft is freely attached, and the drive shaft is rotated to cut the vegetation with a plurality of cutting blade portions. At this time, the cutting blade portion attaches the holder and the vegetation attached to the mounting portion. Since the cutting blade is cut and the holder and the cutting blade are detachably provided by the insertion / removal mechanism, for example, when the cutting blade is damaged or worn and replaced with a new cutting blade, the above drive Without removing or attaching the shaft side mounting part to the holder, the cutting blade can be removed and attached to the holder to replace the cutting blade, and multiple cutting blades can be easily removed. Can be installed, the cutting blade can be replaced quickly, and the cutting workability Since the holder and the cutting blade can be inserted and removed in the direction of the rotational axis of the drive shaft by the insertion / removal mechanism, the cutting blade can be rotated at a high speed and receive the centrifugal force in the radial direction of the drive shaft. Can be prevented and the safety of use can be increased.

又、請求項２記載の発明にあっては、上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び駆動軸の半径方向に延びる対向一対の側杆部を形成し、ホルダ及び刈刃の各端杆部は駆動軸の半径方向に鎖状に交差連繋可能に形成され、刈刃の一方の側杆部に薄肉部を形成し、ホルダの一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態において刈刃の薄肉部の通過を許容する開口溝部を形成しているから、ホルダ及び上記刈刃の各側杆部の交差状態において、刈刃の側杆部に形成した薄肉部をホルダの側杆部に形成した開口溝部を介して連結穴部内に通過させ、薄肉部を通過させた後、刈刃をひねり回転してホルダ及び刈刃の各端杆部を駆動軸の半径方向に鎖状に交差連繋し、これにより、上記ホルダに対する刈刃の交換を容易に行うことができ、薄肉部及び開口溝部の存在により、高速回転する刈刃の離脱を防ぐことができ、使用の安全性を高めることができ、又、請求項３記載の発明にあっては、上記刈刃の一方の側杆部に形成される薄肉部は側杆部の一方面を山型凹面に形成してなり、上記ホルダの一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成しているから、先端側の反り部が逆向きに取付けられる刈刃の共通化を図ることができる。   According to a second aspect of the present invention, as the insertion / removal mechanism, a connecting hole portion is formed in the holder and the cutting blade, respectively, and an end flange portion and a driving shaft extending in the rotation axis direction of the driving shaft are provided. A pair of opposing scissors extending in the radial direction is formed, and the end scissors of the holder and the cutting blade are formed so as to be capable of cross-linking in a chain shape in the radial direction of the drive shaft. Forming an opening groove portion that allows passage of the thin portion of the cutting blade in the crossed state of the side flange portions of the holder and the cutting blade on one side flange portion of the holder. In the intersecting state of each side flange of the cutting blade, the thin wall portion formed on the side flange portion of the cutting blade was passed through the connecting groove portion through the opening groove portion formed on the side flange portion of the holder, and the thin wall portion was allowed to pass. After that, twist and rotate the cutting blade to chain each end collar of the holder and cutting blade in the radial direction of the drive shaft As a result, the cutting blade can be easily exchanged for the holder, and the existence of the thin wall portion and the opening groove portion can prevent the cutting blade that rotates at high speed from being removed, thereby improving the safety of use. Further, in the invention according to claim 3, the thin wall portion formed on one side flange portion of the cutting blade is formed by forming one surface of the side flange portion into a chevron-shaped concave surface, Since the chevron-shaped convex surface is formed on each of the opposed inner surfaces of the opening groove formed on one side flange of the holder, it is possible to share a cutting blade to which the warped portion on the tip side is attached in the opposite direction.

又、請求項４記載の発明にあっては、上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び駆動軸の半径方向に延びる対向一対の側杆部を形成し、ホルダ及び刈刃の各端杆部は駆動軸の半径方向に鎖状に交差連繋可能に形成され、ホルダの一方の側杆部に薄肉部を形成し、刈刃の一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態においてホルダの薄肉部の通過を許容する開口溝部を形成しているから、ホルダ及び上記刈刃の各側杆部の交差状態において、刈刃の側杆部に形成した開口溝部を介してホルダの側杆部に形成した薄肉部を連結穴部内に通過させ、薄肉部を通過させた後、刈刃をひねり回転してホルダ及び刈刃の各端杆部を駆動軸の半径方向に鎖状に交差連繋し、これにより、上記ホルダに対する刈刃の交換を容易に行うことができ、薄肉部及び開口溝部の存在により、高速回転する刈刃の離脱を防ぐことができ、使用の安全性を高めることができ、又、請求項５記載の発明にあっては、上記ホルダの一方の側杆部に形成される薄肉部は側杆部の一方面を山型凹面に形成してなり、上記刈刃の一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成しているから、先端側の反り部が逆向きに取付けられる刈刃の共通化を図ることができる。   According to a fourth aspect of the present invention, as the insertion / removal mechanism, a connecting hole portion is formed in the holder and the cutting blade, respectively, and an end flange portion and a driving shaft extending in the rotation axis direction of the driving shaft are provided. A pair of opposing side flanges extending in the radial direction are formed, and each end flange of the holder and the cutting blade is formed so as to be cross-connected in a chain shape in the radial direction of the drive shaft, and a thin wall portion is formed on one side flange of the holder And an opening groove that allows passage of the thin part of the holder in the crossed state of the holder and each side hook of the cutting blade is formed in one side hook of the cutting blade. In the crossed state of each side flange of the blade, after passing the thin wall portion formed in the side flange portion of the holder through the opening groove portion formed in the side flange portion of the cutting blade into the connecting hole portion and passing the thin wall portion Rotate the cutting blade to rotate the holder and the cutting edge of the cutting blade in the radial direction of the drive shaft Cross-linked, thereby making it easy to replace the cutting blade with respect to the holder, and the presence of the thin wall portion and the opening groove portion can prevent the cutting blade that rotates at high speed from being removed, thereby improving the safety of use. Further, in the invention according to claim 5, the thin wall portion formed on one side flange portion of the holder is formed by forming one surface of the side flange portion as a chevron-shaped concave surface. Since the chevron-shaped convex surface is formed on each of the opposed inner surfaces of the opening groove formed on one side flange of the blade, it is possible to share a cutting blade to which the warped portion on the tip side is attached in the opposite direction.

本発明の実施の第一形態例の斜視図である。1 is a perspective view of a first embodiment of the present invention. 本発明の実施の第一形態例の分解斜視図である。1 is an exploded perspective view of a first embodiment of the present invention. 本発明の実施の第一形態例の取付状態の正面図である。It is a front view of the attachment state of the first embodiment of the present invention. 本発明の実施の第一形態例の取付状態の平断面図である。It is a plane sectional view of the attachment state of the first embodiment of the present invention. 本発明の実施の第一形態例の取付状態の側断面図である。It is side sectional drawing of the attachment state of the example of 1st Embodiment of this invention. 本発明の実施の第一形態例の組み付け状態の斜視図である。It is a perspective view of the assembly state of the first embodiment of the present invention. 本発明の実施の第一形態例の組み付け状態の説明断面図である。It is explanatory sectional drawing of the assembly | attachment state of the example of 1st Embodiment of this invention. 本発明の実施の第一形態例の組み付け状態の説明断面図である。It is explanatory sectional drawing of the assembly | attachment state of the example of 1st Embodiment of this invention. 本発明の実施の第二形態例の斜視図である。It is a perspective view of the second embodiment of the present invention. 本発明の実施の第二形態例の分解斜視図である。It is a disassembled perspective view of the second embodiment of the present invention. 本発明の実施の第二形態例の取付状態の平断面図である。It is a plane sectional view of the attachment state of the second embodiment of the present invention. 本発明の実施の第二形態例の取付状態の側断面図である。It is a sectional side view of the attachment state of the 2nd embodiment of this invention. 本発明の実施の第二形態例の組み付け状態の斜視図である。It is a perspective view of the assembly state of the second embodiment of the present invention. 本発明の実施の第二形態例の組み付け状態の説明断面図である。It is explanatory sectional drawing of the assembly | attachment state of the 2nd example of embodiment of this invention. 本発明の実施の第二形態例の組み付け状態の説明断面図である。It is explanatory sectional drawing of the assembly | attachment state of the 2nd example of embodiment of this invention.

図１乃至図１５は本発明の実施の形態例を示し、図１乃至図８は請求項１、２及び３に対応する第一形態例、図９乃至図１５は請求項１、４及び５第二形態例である。   1 to 15 show an embodiment of the present invention, FIGS. 1 to 8 show a first embodiment corresponding to claims 1, 2 and 3, and FIGS. 9 to 15 show claims 1, 4 and 5. It is a 2nd form example.

図１乃至図８の第一形態例において、１は駆動軸であって、図示省略のフレールモアのフレームに回動自在に横架され、フレールモアの駆動源により回転軸線Ｏの廻りに駆動回転され、この駆動軸１の外周に複数個の取付部２・２・・が所定位置に放射状に配設され、各取付部２・２・・に刈刃部３・３・・が揺動自在に軸着され、駆動軸１を回動して複数個の刈刃部３・３・・により草木類を切断するように構成している。   In the first embodiment shown in FIGS. 1 to 8, reference numeral 1 denotes a drive shaft, which is rotatably mounted on a frame of a flare mower (not shown), and is driven and rotated around a rotation axis O by a flare mower drive source. A plurality of mounting portions 2, 2,... Are radially arranged at predetermined positions on the outer periphery of the drive shaft 1, and the cutting blade portions 3, 3,. It is configured to rotate the drive shaft 1 and cut the vegetation by a plurality of cutting blade portions 3.

この場合、図４、図５、図６の如く、上記刈刃部３は上記取付部２に揺動自在に軸着されるホルダ４及び草木類を切断する二個の刈刃５・５からなり、二個の刈刃５・５は同一形状に形成され、二個の同一形状の刈刃５・５は、取付部２への取付時において、先端側の反り部Ｓは逆向きに取付けられ、ホルダ４と二個の刈刃５・５とを挿脱機構６により上記駆動軸１の回転軸線Ｏ方向、すなわち、駆動軸１の回転軸線Ｏと平行な方向に挿脱自在に設けて構成されている。   In this case, as shown in FIGS. 4, 5, and 6, the cutting blade portion 3 includes a holder 4 that is pivotally attached to the mounting portion 2 and two cutting blades 5 and 5 that cut the plants. The two cutting blades 5 and 5 are formed in the same shape, and the two cutting blades 5 and 5 having the same shape are mounted with the warped portion S on the tip side in the opposite direction when mounted on the mounting portion 2. The holder 4 and the two cutting blades 5 and 5 are detachably provided by the insertion / removal mechanism 6 in the direction of the rotation axis O of the drive shaft 1, that is, in the direction parallel to the rotation axis O of the drive shaft 1. It is configured.

この場合、上記それぞれの取付部２は、上記駆動軸１の外周に一対の取付板２ａ・２ａを溶接により突設してなり、取付板２ａ・２ａに取付ボルト２ｂの軸受穴２ｃを形成し、取付ボルト２ｂに取付ナット２ｄを螺着し、ホルダ４に取付ボルト２ｂが遊挿される遊挿穴Ｑが形成され、取付ボルト２ｂの軸線の廻りにホルダ４を揺動自在に設けて構成している。   In this case, each of the mounting portions 2 is formed by projecting a pair of mounting plates 2a and 2a on the outer circumference of the drive shaft 1 by welding, and a bearing hole 2c of a mounting bolt 2b is formed in the mounting plates 2a and 2a. The mounting nut 2d is screwed onto the mounting bolt 2b, the loose insertion hole Q into which the mounting bolt 2b is loosely inserted is formed in the holder 4, and the holder 4 is swingably provided around the axis of the mounting bolt 2b. ing.

又、この場合、上記挿脱機構６として、図６、図７、図８の如く、上記ホルダ４及び上記刈刃５・５にそれぞれ連結穴部Ｋ・Ｍを形成して上記駆動軸１の回転軸線Ｏ方向に延びる端杆部４ａ・５ａ及び駆動軸１の半径方向に延びる対向一対の側杆部４ｂ・４ｂ・５ｂ・５ｂを形成し、ホルダ４及び刈刃５の各端杆部４ａ・５ａは駆動軸１の半径方向に鎖状に交差連繋可能に形成され、刈刃５の一方の側杆部５ｂに薄肉部Ｆを形成し、ホルダ４の一方の側杆部４ｂに上記ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態において刈刃５の薄肉部Ｆの通過を許容する開口溝部Ｅを形成して構成している。   In this case, as the insertion / removal mechanism 6, as shown in FIGS. 6, 7, and 8, connection holes K and M are formed in the holder 4 and the cutting blades 5 and 5, respectively. The end flanges 4a and 5a extending in the direction of the rotation axis O and a pair of opposed side flanges 4b, 4b, 5b and 5b extending in the radial direction of the drive shaft 1 are formed, and each end flange 4a of the holder 4 and the cutting blade 5 is formed. 5a is formed so as to be capable of cross-linking in a chain shape in the radial direction of the drive shaft 1, and a thin wall portion F is formed on one side flange portion 5b of the cutting blade 5, and the holder is mounted on one side flange portion 4b of the holder 4 4 and the side flanges 4b and 5b of the cutting blade 5 are formed by forming an opening groove E that allows the thin portion F of the cutting blade 5 to pass therethrough.

この場合、図６、図７、図８の如く、上記刈刃５の一方の側杆部５ｂに形成される薄肉部Ｆは側杆部５ｂの一方面をその側杆部５ｂに交差する方向に延びる山型凹面Ｆ１に形成してなり、上記ホルダ４の一方の側杆部４ｂに形成される開口溝部Ｅの対向内面にそれぞれ、その側杆部４ｂに交差する方向に延びる山型凸面Ｅ１・Ｅ１を形成し、具体的には、図７、図８の如く刈刃５の一方の側杆部５ｂの板厚をＴ、薄肉部Ｆの山型凹面Ｆ１の底面から外面までの薄肉厚をＤとし、開口溝部Ｅの対向内面の山型凸面Ｅ１・Ｅ１間の開口寸法をＧとして、板厚Ｔ＞開口寸法Ｇ＞薄肉厚Ｄの関係に形成している。 In this case, as shown in FIGS. 6, 7, and 8, the thin-walled portion F formed on one side flange 5 b of the cutting blade 5 crosses one side of the side flange 5 b with the side flange 5 b. It is formed into a mountain-type concave F 1 extending respectively in opposite inner surfaces of the opening groove E formed on one side rod section 4b of the holder 4, mountain-convex surface extending in a direction crossing to the side rod part 4b E 1 and E 1 are formed. Specifically, as shown in FIGS. 7 and 8, the thickness of one side flange portion 5b of the cutting blade 5 is T, and the outer surface from the bottom surface of the chevron-shaped concave surface F 1 of the thin portion F The thickness D is defined as D, the opening dimension between the convex surfaces E 1 and E 1 on the opposing inner surface of the opening groove E is defined as G, and the relationship of plate thickness T> opening dimension G> thin wall thickness D is formed.

この実施の第一形態例は上記構成であるから、図３、図４、図５の如く、フレールモアの駆動軸１の外周に複数個の取付部２が所定位置に放射状に配設され、各取付部２に刈刃部３が揺動自在に軸着され、駆動軸１を回動して複数個の刈刃部３により草木類を切断することになり、この際、図６の如く、上記刈刃部３は上記取付部２に軸着されるホルダ４及び草木類を切断する二個の刈刃５からなり、ホルダ４と刈刃５とは挿脱機構６により挿脱自在に設けられているから、例えば、刈刃５の破損や損耗が生じ、新たな刈刃５に交換する場合において、上記駆動軸１側の取付部２とホルダ４との取外しや取付けをせずに、ホルダ４に対して刈刃５を取外したり、取付けすことにより刈刃５の交換作業を行うことができ、複数個の刈刃５を容易に取付け、取外すことができ、刈刃５の交換作業を迅速に行うことができ、刈取作業性を高めることができ、かつ、ホルダ４と刈刃５・５とは挿脱機構６により上記駆動軸１の回転軸線Ｏ方向に挿脱自在であるから、高速回転して駆動軸１の半径方向の遠心力を受ける刈刃５・５の離脱を防ぐことができ、使用の安全性を高めることができる。   Since the first embodiment of the present embodiment has the above-described configuration, a plurality of mounting portions 2 are radially arranged at predetermined positions on the outer periphery of the drive shaft 1 of the flare mower as shown in FIGS. A cutting blade portion 3 is pivotally attached to the mounting portion 2 and the drive shaft 1 is rotated to cut vegetation with a plurality of cutting blade portions 3. At this time, as shown in FIG. The cutting blade portion 3 includes a holder 4 that is pivotally attached to the mounting portion 2 and two cutting blades 5 that cut the vegetation. The holder 4 and the cutting blade 5 are detachably provided by an insertion / removal mechanism 6. Therefore, for example, when the cutting blade 5 is damaged or worn out and is replaced with a new cutting blade 5, without removing or attaching the mounting portion 2 and the holder 4 on the drive shaft 1 side, The cutting blade 5 can be exchanged by removing or attaching the cutting blade 5 to the holder 4, and a plurality of cutting blades 5 can be easily obtained. It can be attached and detached, the cutting blade 5 can be exchanged quickly, the cutting workability can be improved, and the holder 4 and the cutting blades 5 and 5 are connected to the drive shaft by the insertion / removal mechanism 6. 1 can be inserted / removed in the direction of the rotation axis O, so that it is possible to prevent the cutting blades 5 and 5 receiving the centrifugal force in the radial direction of the drive shaft 1 from rotating at a high speed and to improve the safety of use. it can.

この場合、上記挿脱機構６として、上記ホルダ４及び上記刈刃５・５にそれぞれ連結穴部Ｋ・Ｍを形成して上記駆動軸１の回転軸線Ｏ方向に延びる端杆部４ａ・５ａ及び駆動軸１の半径方向に延びる対向一対の側杆部４ｂ・４ｂ・５ｂ・５ｂを形成し、ホルダ４及び刈刃５の各端杆部４ａ・５ａは駆動軸１の半径方向に鎖状に交差連繋可能に形成され、刈刃５の一方の側杆部５ｂに薄肉部Ｆを形成し、ホルダ４の一方の側杆部４ｂに上記ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態において刈刃５の薄肉部Ｆの通過を許容する開口溝部Ｅを形成して構成しているから、図６の如く、ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態において、図７の如く、刈刃５の側杆部５ｂに形成した薄肉部Ｆをホルダ４の側杆部４ｂに形成した開口溝部Ｅを介して連結穴部Ｋ内に通過させ、薄肉部Ｆを通過させた後、刈刃５をひねり回転してホルダ４及び刈刃５の各端杆部４ａ・５ａを駆動軸１の半径方向に鎖状に交差連繋し、他の刈刃５についても同様にして、図８の如く、刈刃５の側杆部５ｂに形成した薄肉部Ｆをホルダ４の側杆部４ｂに形成した開口溝部Ｅを介して連結穴部Ｋ内に通過させ、薄肉部Ｆを通過させた後、刈刃５をひねり回転してホルダ４及び刈刃５の各端杆部４ａ・５ａを駆動軸１の半径方向に鎖状に交差連繋し、これにより、上記ホルダ４に対する刈刃５の交換を容易に行うことができ、薄肉部Ｆ及び開口溝部Ｅの存在により、高速回転する刈刃５の離脱を防ぐことができ、使用の安全性を高めることができ、又、この場合、上記刈刃５の一方の側杆部５ｂに形成される薄肉部Ｆは側杆部５ｂの一方面を山型凹面Ｆ１に形成してなり、上記ホルダ４の一方の側杆部４ｂに形成される開口溝部Ｅの対向内面にそれぞれ山型凸面Ｅ１・Ｅ１を形成しているから、先端側の反り部Ｓが逆向きに取付けられる刈刃５・５の共通化を図ることができる。 In this case, as the insertion / removal mechanism 6, end holes 4a and 5a extending in the direction of the rotation axis O of the drive shaft 1 by forming connection holes K and M in the holder 4 and the cutting blades 5 and 5 respectively. A pair of opposed side flanges 4b, 4b, 5b and 5b extending in the radial direction of the drive shaft 1 are formed, and the end flanges 4a and 5a of the holder 4 and the cutting blade 5 are chained in the radial direction of the drive shaft 1. Formed so as to be cross-connected, a thin wall portion F is formed on one side flange portion 5b of the cutting blade 5, and each side flange portion 4b of the holder 4 and the cutting blade 5 is formed on one side flange portion 4b of the holder 4. Since the opening groove E that allows passage of the thin portion F of the cutting blade 5 in the crossing state of 5b is formed, as shown in FIG. 6, each side flange 4b, 5b of the holder 4 and the cutting blade 5 is formed. 7, the thin wall portion F formed on the side flange portion 5 b of the cutting blade 5 is replaced with the side flange portion 4 b of the holder 4 as shown in FIG. 7. After passing through the formed opening groove E into the connecting hole K and passing the thin part F, the cutting blade 5 is twisted and rotated to drive the holder 4 and the end flanges 4a and 5a of the cutting blade 5. Similarly to the other cutting blades 5, the thin wall portion F formed on the side flange portion 5 b of the cutting blade 5 is connected to the side flange portion of the holder 4 as shown in FIG. After passing through the connecting hole portion K through the opening groove portion E formed in 4b and passing the thin portion F, the cutting blade 5 is twisted to rotate, and the end flange portions 4a and 5a of the holder 4 and the cutting blade 5 are rotated. Are connected in a chain in the radial direction of the drive shaft 1 so that the cutting blade 5 can be easily exchanged for the holder 4 and the cutting which rotates at high speed due to the presence of the thin portion F and the opening groove E. The detachment of the blade 5 can be prevented, and the safety of use can be enhanced. In this case, one side of the cutting blade 5 is also provided. Thin portion F formed in part 5b will form one surface of the side rod portions 5b in a mountain-type concave F 1, the opposing inner surfaces of the opening groove E formed on one side rod section 4b of the holder 4 Since each of the mountain-shaped convex surfaces E 1 and E 1 is formed, the cutting blades 5 and 5 to which the warped portion S on the tip side is attached in the opposite direction can be shared.

又、この場合、具体的には、刈刃５の一方の側杆部５ｂの板厚をＴ、薄肉部Ｆの山型凹面Ｆ１の底面から外面までの薄肉厚をＤとし、開口溝部Ｅの対向内面の山型凸面Ｅ１・Ｅ１間の開口寸法をＧとして、板厚Ｔ＞開口寸法Ｇ＞薄肉厚Ｄの関係に形成されているから、刈刃５の離脱を確実に防ぐことができる。 Further, in this case, specifically, the thickness of one side rod portion 5b of the cutting blade 5 T, a thin thickness from the bottom surface of the mountain-shaped concave F 1 of the thin portion F to the outer surface is D, the opening groove E Since the opening dimension between the chevron convex surfaces E 1 and E 1 on the opposite inner surface of G is G, the thickness T> opening dimension G> thin wall thickness D is formed, so that the cutting blade 5 can be reliably prevented from being detached. Can do.

図９乃至図１５の第二形態例は、請求項１、４及び５に対応する別例構造であり、上記第一形態例と同一態様部分には同符号を付し、この場合、図９、図１０、図１３の如く、上記挿脱機構６として、ホルダ４の一方の側杆部４ｂに薄肉部Ｆを形成し、二個の刈刃５・５は同一形状に形成され、刈刃５の一方の側杆部５ｂに上記ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態においてホルダ４の薄肉部Ｆの通過を許容する開口溝部Ｅを形成して構成している。   The second embodiment shown in FIGS. 9 to 15 is another structure corresponding to claims 1, 4, and 5, and the same reference numerals are given to the same portions as the first embodiment, and in this case, FIG. As shown in FIGS. 10 and 13, as the insertion / removal mechanism 6, a thin wall portion F is formed on one side flange 4 b of the holder 4, and the two cutting blades 5, 5 are formed in the same shape. An opening groove E that allows passage of the thin portion F of the holder 4 in the crossed state of the side ridges 4b and 5b of the holder 4 and the cutting blade 5 is formed on one side ridge portion 5b of FIG. Yes.

この場合、図１３、図１４、図１５の如く、上記ホルダ４の一方の側杆部４ｂに形成される薄肉部Ｆは側杆部４ｂの一方面をその側杆部４ｂに交差する方向に延びる山型凹面Ｆ１に形成してなり、上記刈刃５の一方の側杆部５ｂに形成される開口溝部Ｅの対向内面にそれぞれ、その側杆部５ｂに交差する方向に延びる山型凸面Ｅ１・Ｅ１を形成し、具体的には、図１４、図１５の如く、ホルダ４の一方の側杆部４ｂの板厚（この場合、側杆部は丸棒状であるから直径に等しい）をＴ、薄肉部Ｆの山型凹面Ｆ１の底面から外面までの薄肉厚をＤとし、開口溝部Ｅの対向内面の山型凸面Ｅ１・Ｅ１間の開口寸法をＧとして、板厚Ｔ＞開口寸法Ｇ＞薄肉厚Ｄの関係に形成している。 In this case, as shown in FIG. 13, FIG. 14 and FIG. 15, the thin wall portion F formed on one side flange 4b of the holder 4 is in a direction intersecting one side of the side flange 4b with the side flange 4b. extend it to form the mountain-concave F 1, respectively on the opposing inner surfaces of the opening groove E formed on one side rod section 5b of the cutting blade 5, mountain-convex surface extending in a direction crossing to the side rod portion 5b E 1 and E 1 are formed. Specifically, as shown in FIG. 14 and FIG. 15, the thickness of one side flange 4b of the holder 4 (in this case, the side flange is round rod-shaped, so it is equal to the diameter) ) and T, a thin thickness from the bottom surface of the mountain-shaped concave F 1 of the thin portion F to the outer surface is D, the opening size between the mountain-shaped convex surface opposing the inner surface of the opening groove portion E E 1 · E 1 as G, thickness T> opening dimension G> thin wall thickness D.

この実施の第二形態例は上記構成であるから、上記第一形態例と同様に、上記駆動軸１側の取付部２と刈刃部３としてのホルダ４との取付けや取外しをせずに、図１３の如く、ホルダ４に対して刈刃５を取付け、取外すことにより刈刃５の交換作業を行うことができ、複数個の刈刃５を容易に取付け、取外すことができ、刈刃５の交換作業を迅速に行うことができ、刈取作業性を高めることができ、又、この場合、上記挿脱機構６として、上記ホルダ４及び上記刈刃５・５にそれぞれ連結穴部Ｋ・Ｍを形成して上記駆動軸１の回転軸線Ｏ方向に延びる端杆部４ａ・５ａ及び駆動軸１の半径方向に延びる対向一対の側杆部４ｂ・４ｂ・５ｂ・５ｂを形成し、ホルダ４及び刈刃５の各端杆部４ａ・５ａは駆動軸１の半径方向に鎖状に交差連繋可能に形成され、ホルダ４の一方の側杆部４ｂに薄肉部Ｆを形成し、二個の刈刃５・５は同一形状に形成され、刈刃５の一方の側杆部５ｂに上記ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態において刈刃５の薄肉部Ｆの通過を許容する開口溝部Ｅを形成して構成しているから、図１３の如く、ホルダ４及び上記刈刃５の各側杆部４ｂ・５ｂの交差状態において、図１４の如く、刈刃５の側杆部５ｂに形成した開口溝部Ｅを介してホルダ４の側杆部４ｂに形成した薄肉部Ｆを連結穴部Ｍ内に通過させ、薄肉部Ｆを通過させた後、刈刃５をひねり回転してホルダ４及び刈刃５の各端杆部４ａ・５ａを駆動軸１の半径方向に鎖状に交差連繋し、他の刈刃５についても同様にして、図１５の如く、刈刃５の側杆部５ｂに形成した開口溝部Ｅを介してホルダ４の側杆部４ｂに形成した薄肉部Ｆを連結穴部Ｍ内に通過させ、薄肉部Ｆを通過させた後、刈刃５をひねり回転してホルダ４及び刈刃５の各端杆部４ａ・５ａを駆動軸１の半径方向に鎖状に交差連繋し、これにより、上記ホルダ４に対する刈刃５の交換を容易に行うことができ、薄肉部Ｆ及び開口溝部Ｅの存在により、高速回転する刈刃５の離脱を防ぐことができ、使用の安全性を高めることができ、又、この場合、上記ホルダ４の一方の側杆部４ｂに形成される薄肉部Ｆは側杆部４ｂの一方面を山型凹面Ｆ１に形成してなり、上記刈刃５の一方の側杆部５ｂに形成される開口溝部Ｅの対向内面にそれぞれ山型凸面Ｅ１・Ｅ１を形成しているから、先端側の反り部Ｓが逆向きに取付けられる刈刃５・５の共通化を図ることができる。 Since the second embodiment of the present embodiment has the above-described configuration, it is not necessary to attach or remove the mounting portion 2 on the drive shaft 1 side and the holder 4 as the cutting blade portion 3 as in the first embodiment. As shown in FIG. 13, the cutting blade 5 can be replaced by attaching and removing the cutting blade 5 to and from the holder 4, and a plurality of cutting blades 5 can be easily attached and removed. 5 can be performed quickly, and cutting workability can be improved. In this case, as the insertion / removal mechanism 6, the holder 4 and the cutting blades 5 and 5 are connected to the connecting holes K. M is formed to form end flanges 4a and 5a extending in the direction of the rotation axis O of the drive shaft 1 and a pair of opposed side flanges 4b, 4b, 5b and 5b extending in the radial direction of the drive shaft 1, and the holder 4 And the end flanges 4a and 5a of the cutting blade 5 can be cross-linked in a chain shape in the radial direction of the drive shaft 1 The thin part F is formed on one side flange 4b of the holder 4, the two cutting blades 5 and 5 are formed in the same shape, and the holder 4 and the one side flange 5b of the cutting blade 5 are Since the opening groove E that allows the thin portion F of the cutting blade 5 to pass through is formed in the intersecting state of the side flanges 4b and 5b of the cutting blade 5, as shown in FIG. In the crossed state of the side flanges 4b and 5b of the cutting blade 5, as shown in FIG. 14, the thin portion formed on the side flange 4b of the holder 4 through the opening groove E formed on the side flange 5b of the cutting blade 5. After passing F through the connecting hole M and passing through the thin portion F, the cutting blade 5 is twisted to rotate the holder 4 and the end flanges 4a and 5a of the cutting blade 5 in the radial direction of the drive shaft 1. Similarly, the other cutting blades 5 are connected to each other in a chain shape, and the opening groove E formed on the side flange 5b of the cutting blade 5 as shown in FIG. Then, after passing the thin portion F formed in the side flange portion 4b of the holder 4 into the connecting hole portion M and passing the thin portion F, the cutting blade 5 is twisted and rotated, and each of the holder 4 and the cutting blade 5 is rotated. The end flanges 4a and 5a are cross-linked in the radial direction of the drive shaft 1 so that the cutting blade 5 can be easily exchanged for the holder 4 and the presence of the thin portion F and the opening groove E. Therefore, it is possible to prevent the cutting blade 5 that rotates at a high speed from being detached and to improve the safety of use. In this case, the thin portion F formed on the one side flange 4b of the holder 4 one surface of the rod portion 4b is formed in a mountain-type concave F 1 becomes in a respective one chevron convex E 1 · E 1 to the opposing inner surface of the opening groove E formed on the side rod portions 5b of the cutting blade 5 Since it is formed, the cutting blades 5 and 5 to which the warped portion S on the tip side can be mounted in the opposite direction can be shared. The

又、この場合、具体的には、ホルダ４の一方の側杆部４ｂの板厚をＴ、薄肉部Ｆの山型凹面Ｆ１の底面から外面までの薄肉厚をＤとし、開口溝部Ｅの対向内面の山型凸面Ｅ１・Ｅ１間の開口寸法をＧとして、板厚Ｔ＞開口寸法Ｇ＞薄肉厚Ｄの関係に形成されているから、刈刃５の離脱を確実に防ぐことができる。 Further, in this case, specifically, the one plate thickness of the side rod portions 4b of the holder 4 T, from the bottom of the mountain-shaped concave F 1 of the thin portion F a thin thickness to the outer surface is D, the opening groove E Since the opening dimension between the chevron convex surfaces E 1 and E 1 on the opposing inner surface is G, and the plate thickness T> the opening dimension G> the thin wall thickness D is formed, it is possible to reliably prevent the cutting blade 5 from being detached. it can.

尚、本発明は上記実施の形態例に限られるものではなく、駆動軸１、取付部２、刈刃部３、ホルダ４、刈刃５、挿脱機構６の構造や形状、数等は適宜変更して設計されるものである。   In addition, this invention is not restricted to the said embodiment, The structure, shape, number, etc. of the drive shaft 1, the attachment part 2, the cutting blade part 3, the holder 4, the cutting blade 5, and the insertion / removal mechanism 6 are suitably used. It is designed by changing.

以上、所期の目的を充分達成することができる。   As described above, the intended purpose can be sufficiently achieved.

Ｋ 連結穴部
Ｍ 連結穴部
Ｆ 薄肉部
Ｅ 開口溝部
Ｆ１ 山型凹面
Ｅ１ 山型凸面
１ 駆動軸
２ 取付部
３ 刈刃部
４ ホルダ
４ａ 端杆部
４ｂ 側杆部
５ 刈刃
５ａ 端杆部
５ｂ 側杆部
６ 挿脱機構 K connecting hole portion M connecting hole portion F thin wall portion E opening groove portion F 1 ridge shape concave surface E 1 ridge shape convex surface 1 drive shaft 2 mounting portion 3 cutting blade portion 4 holder 4a end flange portion 4b side flange portion 5 cutting blade 5a end rod Part 5b side flange part 6 insertion / removal mechanism

Claims (5)

駆動軸の外周に複数個の取付部が所定位置に放射状に配設され、該各取付部に刈刃部が揺動自在に軸着され、該駆動軸を回動して複数個の刈刃部により草木類を切断するフレールモアにおいて、上記刈刃部は上記取付部に揺動自在に軸着されるホルダ及び草木類を切断する刈刃からなり、該ホルダと該刈刃とは挿脱機構により上記駆動軸の回転軸線方向に挿脱自在に設けられていることを特徴とするフレールモア用刈刃の取付構造。   A plurality of attachment portions are radially arranged at predetermined positions on the outer periphery of the drive shaft, and a cutting blade portion is pivotally attached to each attachment portion, and a plurality of cutting blades are rotated by rotating the drive shaft. In the flare mower that cuts the vegetation by the part, the cutting blade part comprises a holder that is pivotally attached to the mounting part and a cutting blade that cuts the vegetation, and the holder and the cutting blade are inserted and removed. The flare mower cutting blade mounting structure is provided so as to be detachable in the direction of the rotational axis of the drive shaft. 上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び該駆動軸の半径方向に延びる対向一対の側杆部を形成し、該ホルダ及び該刈刃の各端杆部は該駆動軸の半径方向に鎖状に交差連繋可能に形成され、該刈刃の一方の側杆部に薄肉部を形成し、該ホルダの一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態において該刈刃の薄肉部の通過を許容する開口溝部を形成してなることを特徴とする請求項１記載のフレールモア用刈刃の取付構造。   As the insertion / removal mechanism, a connecting hole portion is formed in each of the holder and the cutting blade to form an end flange portion extending in the rotation axis direction of the drive shaft and a pair of opposed side flange portions extending in the radial direction of the drive shaft. The holder and each cutting edge of the cutting blade are formed so as to be capable of cross-linking in a chain shape in the radial direction of the drive shaft, and a thin wall is formed on one side hook of the cutting blade. The flare mower according to claim 1, wherein an opening groove portion is formed in one side flange portion to allow passage of a thin portion of the cutting blade in an intersecting state of the holder and each side flange portion of the cutting blade. Cutting blade mounting structure. 上記刈刃の一方の側杆部に形成される薄肉部は該側杆部一方面を山型凹面に形成してなり、上記ホルダの一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成してなることを特徴とする請求項２記載のフレールモア用刈刃の取付構造。   The thin-walled portion formed on one scissor portion of the cutting blade is formed by forming one side surface of the scissor portion as a chevron-shaped concave surface, and on the inner surface facing the opening groove formed on one scissor portion of the holder. 3. A mounting structure for a flare mower cutting blade according to claim 2, wherein each of them has an angled convex surface. 上記挿脱機構として、上記ホルダ及び上記刈刃にそれぞれ連結穴部を形成して上記駆動軸の回転軸線方向に延びる端杆部及び該駆動軸の半径方向に延びる対向一対の側杆部を形成し、該ホルダ及び該刈刃の各端杆部は該駆動軸の半径方向に鎖状に交差連繋可能に形成され、該ホルダの一方の側杆部に薄肉部を形成し、該刈刃の一方の側杆部に上記ホルダ及び上記刈刃の各側杆部の交差状態において該ホルダの薄肉部の通過を許容する開口溝部を形成してなることを特徴とする請求項１記載のフレールモア用刈刃の取付構造。   As the insertion / removal mechanism, a connecting hole portion is formed in each of the holder and the cutting blade to form an end flange portion extending in the rotation axis direction of the drive shaft and a pair of opposed side flange portions extending in the radial direction of the drive shaft. The holder and each edge of the cutting blade are formed to be capable of cross-linking in a chain shape in the radial direction of the drive shaft, and a thin portion is formed on one side flange of the holder. 2. The flare mower according to claim 1, wherein an opening groove that allows passage of the thin portion of the holder in an intersecting state of the holder and each side hook of the cutting blade is formed in one side hook. Cutting blade mounting structure. 上記ホルダの一方の側杆部に形成される薄肉部は該側杆部一方面を山型凹面に形成してなり、上記刈刃の一方の側杆部に形成される開口溝部の対向内面にそれぞれ山型凸面を形成してなることを特徴とする請求項４記載のフレールモア用刈刃の取付構造。   The thin wall portion formed on one side collar of the holder is formed with a chevron-shaped concave surface on one side of the side collar, and is formed on the opposing inner surface of the opening groove formed on one side collar of the cutting blade. The mounting structure for a flare mower cutting blade according to claim 4, wherein each has a mountain-shaped convex surface.
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